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Nickel-nitrogen-carbon (Ni-N-C) electrocatalysts toward CO2 electroreduction: Advance...
Qingqing Pang
Xizheng Fan

Qingqing Pang

and 9 more

November 01, 2023
Electrocatalytic reduction of CO2 into high energy-density fuels and value-added chemicals under mild conditions can promote the sustainable cycle of carbon and decrease current energy and environmental problems. Constructing electrocatalyst with high activity, selectivity, stability and low cost is really matter to realize industrial application of electrocatalytic CO2 reduction (ECR). Metal-nitrogen-carbon (M-N-C) electrocatalysts, especially Ni-N-C, display excellent performance, such as nearly 100% CO selectivity, high current density, outstanding tolerance, etc., which is considered to possess broad application prospects. Based on the current research status, starting from the mechanism of ECR and the existence form of Ni active species, the latest research progress of Ni-N-C electrocatalysts in CO2 electroreduction is systematically summarized. An overview is emphatically interpreted on the regulatory strategies for activity optimization over Ni-N-C, including N coordination modulation, vacancy defects construction, morphology design, surface modification, heteroatom activation, bimetallic cooperation. Finally, some urgent problems and future prospects on designing Ni-N-C catalyst for ECR are discussed. This review aims to provide the guidance for the design and development of Ni-N-C catalyst with practical application.
Modulating the Electrolyte Inner Solvation Structure via Low Polarity Cosolvent for L...
Yongchao Kang
Feng Zhang

Yongchao Kang

and 8 more

November 01, 2023
Aqueous zinc-ion batteries (AZIBs) are regarded as the promising candidates for large-scale energy storage systems owing to low cost and high safety; however, their applications are restricted by their poor low-temperature performance. Herein, a low-temperature electrolyte for low-temperature AZIBs is designed by introducing low-polarity diglyme (DGM) into an aqueous solution of Zn(ClO4)2. The DGM disrupts the hydrogen-bonding network of water and lowers the freezing point of the electrolyte to -105 °C. The designed electrolyte achieves ionic conductivity up to 16.18 mS cm-1 at -45 °C. The DGM and ClO4- reconfigure the solvated structure of Zn2+, which is more favorable for the desolvation of Zn2+ at low temperatures. In addition, the DGM effectively suppresses the dendrites, hydrogen evolution reaction, and by-products of the zinc anode, improving the cycle stability of the battery. At -20 °C, a Zn||Zn symmetrical cell is cycled for 4,500 h at 1 mA cm-2 and 1 mA h cm-2, and a Zn|| polyaniline (PANI) battery achieves an ultra-long cycle life of 10,000 times. This study sheds light on the future design of electrolytes with high ionic conductivity and easy desolvation at low temperatures for rechargeable batteries.
Study and Characterization of BaFe12O19-PVDF Materials Prepared by Co-Precipitation f...
Syahrul Humaidi
Muhammadin  Hamid

Syahrul Humaidi

and 2 more

November 01, 2023
Supercapacitors are an interesting energy storage technology to be studied. This research uses mesoporous BaFe12O19 particles and Polyvinylidene fluoride (PVDF) polymers that have been synthesized as materials to obtain supercapacitors that have high performance. The synthesis carried out using the co-precipitation chemical method with a calcination process at 200oC and has a variation in the composition of BaFe12O19-PVDF material with a mass ratio of barium chloride: natural iron sand: PVDF, namely 6:4:0, 4:4:2, 3:4:3, 2:4:4, 0:4:6. Then characterization was carried out including: morphological properties and particle size using scanning electron microscopy (SEM), and energy diffraction X-ray (EDX). Furthermore, to determine the structure of the material using X-ray diffraction (XRD) and Fourier-transform infrared (FT-IR). The electrochemical properties of the material were investigated using cyclic voltammetry (CV) and galvanostatic charge/discharge (GCD). The result of the fabricated material is that the grains have been distributed with the average particle size of each sample ranging from 180-185 nm. Then has the highest peak in crystals with miller index (114) and (311). Furthermore, it has the main functional groups, namely Ba-O and C=C with wave numbers 1640.00 cm-1 and 1632.00 cm-1. And finally has the highest specific capacitance value of 1.77 F/g with an area of 0.51255 mVA, then the highest energy density at a value of 8.608 Wh/kg and the highest power density value at a value of 195.940 W/kg. The optimum composition obtained is 2:4:4 which can be applied as a candidate electrode for supercapacitors.
Environmental and landscape genomics of Picea sitchensis (Sitka spruce) reveals clust...
Tomas Byrne
Niall Farrelly

Tomas Byrne

and 5 more

October 30, 2023
Picea sitchensis (Sitka spruce) occupies a large number of host environments across the Pacific Northwest, stretching from California to Alaska. Populations have become locally adapted to their environmental niche rather than undergoing speciation and these local adaptions can be discovered and utilised for breeding programs. These local adaptions may contain traits which can confer increased resilience against climate change. Here we employed Genome Wide Association Studies (GWAS), Genotype Environment Analysis (GEA) and Canonical correlation analysis to discover adaptive loci. A total of 593 adaptive loci were discovered from the GEA. The GWAS found eight loci involved with height and one with diameter at breast height. The canonical correlation analysis allowed for the discovery of positive and negative correlated loci with traits or environmental variables. We discovered 121 loci positively correlated with environmental values and 10 loci positively correlated with phenotypic traits. We discovered one cluster of adaptive loci involved with snowy winter conditions and two clusters showing adaptation to southern locations characterised with milder conditions. The allelic distribution of positive and negatively correlated loci involved with height showed a north south divide with loci positively correlated with height being distributed below a latitude of 50oN. This shows adaptations for height are generally found south of the 50th latitude. We have discovered signs of local adaptation, with Minor Allele Frequency (MAF) differing between northern and southern populations.
Human fragmentation effects are genetically detectable after 6 years in the island-en...
Wen-Ting Jin
Shao-Jun Ling

Wen-Ting Jin

and 5 more

November 01, 2023
Anthropogenic disturbances have long been acknowledged to be one of the primary threats to biodiversity worldwide, while little is still understood about how human-built infrastructure affects the gene flows and phylogeographic structure of plants. Such information is helpful for the conservation and restoration of human-disturbed ecosystems. Here we studied effects of a big river with a huge reservoir and two expressways on an island-endemic Primulina heterotricha (Gesneriaceae) on Hainan Island, China, one of the key parts of the glob ally important Indo-Burma biodiversity hotspot. By applying comparative phylogeography using one nuclear ribosomal DNA and two chloroplast DNA sequences, we estimated the levels of genetic diversity and differentiation in 176 and 117 individuals collected, respectively, before (in 2016) and after (in 2022) the construction of two expressways in Hainan Island, from the same eight populations of P. heterotricha. We found that Primulina heterotricha significantly increased nuclear genetic differentiation during the period 2016–2022, which coincides with the opening of the two expressways. Also notably, the sharing of ribotypes among the three groups of populations separated by the expressway network almost disappeared for the same period. Moreover, the changes in the significance of genetic barriers before and after road construction suggest that geographic isolation caused by both the reservoir and the expressways is key for understanding the present phylogeographical patterns of P. heterotricha. We provide direct evidence that anthropogenic infrastructures such as reservoirs and expressways have been capable of increasing genetic differentiation and, thus, modifying the phylogeographical pattern of P. heterotricha, in just a six-year period (or two generations of the study plant). To mitigate such negative pressure, we suggest establishing ecological corridors to enhance gene exchange between the two sides of the anthropogenic barriers.
Potassium stimulates fruit sugar accumulation by increasing carbon flow in Citrus
Kongjie Wu
Cheng-Xiao hu

Kongjie Wu

and 9 more

November 01, 2023
Soluble sugar is a key factor of flavor quality in citrus. Potassium (K) is known as a quality element, which plays key roles in improving sugar accumulation and fruit quality, but the mechanisms are largely unknown. This study aims to elucidate how K improves sugar accumulation by regulating carbon flow between source and sink in Newhall navel orange ( Citrus sinensis). The results demonstrated that appropriate K concentration improved fruit quality and sugar accumulations in citrus, and 1.5% of K concentration in pulp was the optimal concentration for fruit quality. K increased strength of sink and source, as supported by the increased fruit growth rate, gene expressions related to sugar metabolism and sugar transport in fruit, and photosynthesis, gene expressions of sugar metabolism in leaf, respectively, which contributed to increasing sugars accumulation. Further study indicated that K improved carbon flow from source to sink by boosting symplastic and apoplastic loading of phloem, as supported by the increased CF signal intensities, plasmodesmata densities, and the expressions of CsSUT1 and CsSUT2 in leaf at early and mid stages of fruit development, finally increasing sugar accumulation in fruit. Conclusively, K stimulates fruit sugar accumulation by increasing carbon flow in Newhall navel orange.
Inside-out: synergising leaf biochemical traits with stomatal-regulated water fluxes...
Robert S Caine
Muhammad S. Khan

Robert S. Caine

and 4 more

November 01, 2023
With continued global warming, plants are forecast to increasingly experience abiotic stress(es). Stomata on leaf surfaces are the gatekeepers to plant interiors, regulating gaseous exchanges that are crucial for both photosynthesis and outward water release. To optimise future productivity, accurate modelling of how stomata govern plant-environment interactions will be crucial. Here, we synergise optical and thermal imaging data to enhance transpiration modelling during water and/or nitrogen stress. By utilising hyperspectral data and partial least squares regression analysis of six plant traits and fluxes in wheat ( Triticum aestivum), we have developed a new spectral vegetation index; the combined nitrogen and drought index (CNDI), which can be used to detect both water stress and/or nitrogen deficiency. Upon full stomatal closure during drought, CNDI reduces as leaf biochemistry changes unfold, and during a combined stress experiment (drought and nitrogen deficiency), this is reflected in CNDI showing a strong relationship with leaf relative water content ( r2 = 0.70). By incorporating CNDI transformed with a sigmoid function into thermal-based transpiration modelling, we have increased the accuracy of modelling water fluxes during abiotic stress. If employed using future remote sensing technologies, our findings have the potential to markedly improve agricultural water usage and yields.
Ulcerative colitis associated mononeuritis multiplex in 75-year-old patient: rare cas...
omid pourbagherian
Mehdi Jafarpour

omid pourbagherian

and 4 more

November 01, 2023
IntroductionInflammatory bowel disease (IBD) refers to a collection of chronic, idiopathic inflammatory/autoimmune disorders of the gastrointestinal tract characterized by relapsing and remitting episodes(1). The two main types of IBD are Crohn’s disease and ulcerative colitis which lead to a various type of debilitating symptoms such as abdominal pain, rectal bleeding, weight loss, and diarrhea. The precise mechanisms underlying IBD pathogenesis remain unclear but are thought to involve a dysfunctional interplay between host genetics, the intestinal immune system, and environmental factors(2). Current evidence suggests IBD results from an aberrant immune response directed against commensal gut bacteria in genetically susceptible individuals(3). Multiple genetic loci have been implicated in IBD risk, including genes involved in epithelial barrier function, microbial sensing, and immunoregulation. However, genetics alone cannot explain IBD’s rising incidence, highlighting the likely contribution of environmental risk factors like diet, smoking, medications, stress, and the microbiome. Ongoing research aims to better delineate the complex immunopathogenesis of IBD in order to identify improved diagnostic markers, prognostic indicators, and therapeutic targets(4). Moreover, Individuals diagnosed with IBD frequently encounter an array of difficulties that extend beyond the gastrointestinal system. One such challenge is the emergence of mononeuritis multiplex. This association between ulcerative colitis and mononeuritis multiplex underscores the intricate and multifaceted nature of these autoimmune disorders. The occurrence of symptoms of one condition in individuals afflicted by the other warrants careful examination by medical specialists. This necessitates a thorough investigation into the underlying reasons and the implementation of preventive measures. In this case report, we will report a patient who has encountered ulcerative colitis related to mononeuritis multiplex.
Early-onset neurodevelopmental disorder due to biallelic mutations in NRROS: a case r...
kobra sheidaee
Ali Abbaskhanian

kobra sheidaee

and 2 more

November 01, 2023
IntroductionNegative regulator of reactive oxygen species (NRROS) gene (previously known as Lrrc33) produces a protein that functions as a general negative regulator of ROS production in phagocytes. ROS produced by phagocytes are essential for host defense but excessive ROS can cause collateral tissue damage during inflammatory processes and therefore needs to be tightly regulated. The predicted structure of NRROS contains a signal sequence, 21 putative leucine-rich repeat domains, a transmembrane domain, and a short cytoplasmic domain. NRROS is preferentially expressed in immune organs such as lymph nodes, thymus and spleen. Among leukocytes, myeloid cell subsets including macrophages, neutrophils and dendritic cells has the highest NRROS expression.(1)Microglia are specified phagocytes in the CNS parenchyma. They are vital in maintaining CNS homeostasis. Additionally, they control clearance of cellular debris and uptake of glutamate and other neurotransmitters. Defects in microglial function have been accompanying with neuroinflammation and disorders such as Alzheimer’s disease, Parkinson’s disease and amyotrophic lateral sclerosis (ALS). In addition to microglia in the CNS parenchyma, nonparenchymal perivascular macrophages (PVMs), subdural meningeal macrophages (MMs) and choroid plexus macrophages (CPMs) exist throughout the CNS at steady state.(2, 3)Canonical macrophage developmental factors such as PU.1, IL-34, CSFR1 and IRF8 have roles in microglial function and expansion. TGF-β and Sall1 were lately identified as unique factors that are essential for microglia development. NRROS is highly expressed in CNS-resident macrophages, containing microglia and PVMs. Loss of NRROS results in astrogliosis, defects in motor function and reduced lifespan. Mechanistically, NRROS expression is essential in microglia for differentiation during early embryonic development. In one study, it was shown that the CNS of NRROS-deficient mice lacks normal microglia and is instead populated by PVM-like cells (PLCs). These neurological phenotypes resulting from NRROS deficiency in mice were not associated with classical signs of neurodegeneration, neuroinflammation or increased ROS production as observed in the ALS model. Instead, NRROS deficiency resulted in a complete loss of CD11bhiCD45lo microglia with concomitant emergence of PLCs (PVM-like cells) in the CNS.(4)
Simultaneous anterior and inferior ST elevation myocardial infarction secondary to an...
Salvador Guzmán-Castro
Elias Noel Andrade-Cuellar

Salvador Guzmán-Castro

and 3 more

November 01, 2023
A 40-year-old male with a history of smoking, which had ceased 10 years ago, was evaluated for typical precordial pain of 10 hours of evolution. EKG showed ST elevation on anterior an inferior leads. Coronary angiography performed after 14 hours showed coronary ectasia with aneurysms in the anterior descending and right
Topographical features in micro and nano scale scratch tracks on CNx coatings
A S Bhattacharyya

A S Bhattacharyya

November 08, 2023
A document by A S Bhattacharyya. Click on the document to view its contents.
A Case of Subarachnoid Haemorrhage in a 16 y/o female with joint hypermobility treate...
Usman Ahmed
Haroon Shabbir

Usman Ahmed

and 4 more

November 08, 2023
Key Clinical Message:Subarachnoid Haemorrhage (SAH) represents a critical medical emergency that can result from either a traumatic head injury or the spontaneous rupture of an aneurysm. Timely diagnosis and carefully planned interventions are of paramount importance in managing this condition to enhance clinical outcomes. Additionally, it is crucial for healthcare professionals to be well-informed about the associated risk factors and potential complications that may arise during the course of this emergency. We present the case of a 16-year-old female patient who developed subarachnoid haemorrhage due to the rupture of a berry aneurysm. Both clinical and imaging diagnostics confirmed the presence of a ruptured berry aneurysm and subarachnoid bleeding. Subsequently, the patient underwent successful endovascular coiling, leading to her recovery.While extensive literature underscores the effectiveness of endovascular coiling in treating ruptured aneurysms, its utilization is less common in the developing world. This can be attributed to limited resources and inadequate training of physicians in this specific procedure. Given the widespread occurrence of subarachnoid haemorrhage, it is imperative that healthcare systems in developing countries are adequately equipped to offer minimally invasive treatments that can improve clinical outcomes. Furthermore, our case report highlights a significant clinical association between connective tissue disorders and the occurrence of ruptured berry aneurysms. This underscores the need for further research into this particular association.
Proof-of-concept of a robotic-driven photogrammetric scanner for intra-operative knee...
Álvaro Bertelsen
Amaia Iribar-Zabala

Álvaro Bertelsen

and 5 more

November 01, 2023
This work present a proof-of-concept of a robotic-driven intra-operative scanner designed for knee cartilage lesion repair, part of a system for direct in vivo bioprinting. The proposed system is based on a photogrammetric pipeline, which reconstructs the cartilage and lesion surfaces from sets of photographs acquired by a robotic-handled endoscope, and produces 3D grafts for further printing path planning. A validation on a synthetic phantom is presented, showing that —despite the cartilage smooth and featureless surface— the current prototype can accurately reconstruct osteochondral lesions and their surroundings with mean error values of 0.199 ± 0.096 mm but with noticeable concentration on areas with poor lighting or low photographic coverage. The system can also accurately generate grafts for bioprinting, although with a slight tendency to underestimate the actual lesion sizes, producing grafts with coverage errors of -12.2 ± 3.7, -7.9 ± 4.9 and -15.2 ± 3.4 % for the medio-lateral, antero-posterior and craneo-caudal directions respectively. Improvements in lighting and acquisition for enhancing reconstruction accuracy are planned as future work, as well as integration into a complete bioprinting pipeline and validation with ex vivo phantoms.
Sliding indents of hard coatings: analysis of failure morphologies and intermediate f...
A S Bhattacharyya

A S Bhattacharyya

November 08, 2023
Sliding tests both in micro and nano level were done on hard coatings developed on silicon substrates and 304SS substrates using magnetron sputtering. Different types of failure morphologies manifested themselves and were found to be a function of substrate, indenter, loading nature apert from the coating. Linear profiles of the failed segments along with analysis of the scratch track were done which provided a qualitative depiction of adhesive, wear and abrasive properties of the coatings useful for their heavy duty and microelectronic applications
Wu Lien-teh: Pioneer of Modern Medicine in China
Yiren Qin

Yiren Qin

November 08, 2023
Wu Lien-teh: Pioneer of Modern Medicine in China Yiren Qin**Black Family Stem Cell Institute, Icahn School of Medicine at Mount Sinai,New York, NY 10029E-mail: yirenqin@hotmail.comWu Lien-teh was born in 1879 on the island of Penang in Malaya (four days before Einstein). He hailed from Taishan, Guangdong. In 1896, at the age of 17, Dr. Wu excelled and was awarded the Queen’s Scholarship by Queen Victoria to study at the University of Cambridge in London. During his research, he successively studied at St. Mary’s Hospital in the UK, the Liverpool School of Tropical Medicine, the Hygiene Institute at the University of Halle in Germany, and the Pasteur Institute in France. He was mentored by Nobel laureates Professor Elie Metchnikoff and Professor Frederick Gowland Hopkins. Dr. Wu pursued his studies abroad for seven years, earning a total of five degrees from the University of Cambridge: Bachelor of Medicine, Bachelor of Arts, Master of Surgery, Master of Arts, and Doctor of Medicine. He obtained his doctorate at the young age of 24. He was also the first Chinese person in the world to be awarded a doctorate from the University of Cambridge.In 1907, Dr. Wu was invited by Yuan Shikai to return to China and serve as the Vice President of the Tianjin Military Medical School.In 1910, after the outbreak of the Great Manchurian Plague, Dr. Wu was appointed to the critical position of Chief Medical Officer. In less than four months, he managed to bring this deadly infectious disease, which had left both the Russians and Japanese helpless and claimed over 60,000 lives, to a complete halt. This extraordinary feat, a century-defining epidemic, astounded the world and saved millions of lives. Dr. Wu Lien-teh, who led this epidemic prevention effort, became renowned worldwide.Dr. Wu immediately confirmed that the plague was bubonic plague, and the culprit was the muskrat. Additionally, he boldly speculated that this plague was not transmitted from rats to humans in the usual way, but rather from person to person. This was because it spread through the respiratory tract and presented symptoms such as fever, coughing, and pulmonary infection. He first introduced the concept of pneumonic plague. At that time, although there was some understanding of bubonic plague, it was believed that it was transmitted from rats to humans, and those who contracted it would not further spread it to others. In other words, human-to-human transmission was not considered possible. Therefore, when Kitasato Shibasaburo, a Japanese scientist known as the ”Oriental Pasteur,” who first discovered the plague bacillus in the world, sent people to dissect thousands of rats in Harbin, they did not find the plague bacillus and denied that it was bubonic plague. On the other hand, Gérald Mesny, a well-known French doctor with experience in combating the plague, believed that it was spread by rats and that human-to-human transmission was not possible. This is what we now know as glandular plague. He even claimed that he was more qualified than Dr. Wu Lien-teh and demanded that Dr. Wu relinquish full authority over epidemic prevention in Northeast China and let him take sole command. However, Gérald Mesny did not take proper precautions, directly contacted patients, and succumbed to the plague in less than three days. The final outcome told us that Dr. Wu Lien-teh’s speculation and measures for pulmonary plague were correct. Because of his astounding achievements, an International Plague Conference, attended by representatives from Japan, the United Kingdom, the United States, Russia, Germany, France, Italy, the Netherlands, Austria, Mexico, and China, was held in Shenyang. Dr. Wu Lien-teh served as the chairman of the conference, and the Japanese scientist Kitasato Shibasaburo, who discovered the plague bacillus, humbly took the position of vice chairman. This conference was the first international academic conference ever held in Chinese history. Dr. Wu took full charge, and it had a profound impact on the development of modern medicine and life sciences in China.During the first major outbreak of pulmonary plague in the Three Eastern Provinces (1910-1911), Dr. Wu Lien-teh harbored the idea of conducting in-depth research on this highly infectious disease and writing a dedicated treatise. However, the conditions were not ripe for it that year. In April 1911, at the International Plague Conference held in Fengtian, Dr. Wu Lien-teh first proposed the ”pulmonary plague” theory, which was recognized by experts from various countries in attendance. In July 1911, Dr. Wu Lien-teh led assistants Chen Sibang and Dr. Cang, along with Russian experts including Professor Saburov, to form a Sino-Russian joint inspection team to investigate the prevalence of plague among tarabagans on the Sino-Russian border. The results of this investigation were compiled by Dr. Wu Lien-teh into a report titled ”Investigation into the Relationship of Tarabagan (Mongolia Marmot) to Plague,” which was published in the internationally renowned journal ”The Lancet” (Lancet, 1913, 185, 529).Dr. Wu Lien-teh remained stationed at the border, successfully preventing the Shanxi plague of 1918 (which claimed around 16,000 lives) and the second major outbreak of plague in Northeast China (resulting in around 9,300 deaths). During his second campaign against the plague, he did not hold an official position, and therefore, lacked the authority to mobilize manpower or resources. He wasn’t a high-ranking official and didn’t have access to funds. What he relied on was his unparalleled medical skills honed over a decade.Due to his astonishing achievements, Dr. Wu Lien-teh gained global renown. The Northeast Anti-epidemic Bureau, established by Dr. Wu, became the world’s premier institution for researching epidemics. It not only held an international leading position in disease prevention but also achieved a world-leading level in scientific research. The collection of samples from pulmonary plague patients and specimens of wild rodents was exceptionally comprehensive, making it unique in the world at that time. The epidemiological data gathered on the prevalence of plague was unmatched by any other research institution. Therefore, the Northeast Anti-epidemic Bureau consistently held a leading position in the world in various aspects of plague, including its prevalence, monitoring, diagnosis, and animal experiments. Additionally, it made outstanding contributions to the prevention, control, and treatment of cholera, also holding a world-leading position in this field. At that time, many renowned scholars from abroad sought to further their studies and work under his guidance, including Yonghan Chen from the University of Cambridge, an Austrian from the University of Vienna named Borlase, Sibong Chen from the University of Cambridge, Ronald, a Briton from the University of Edinburgh, Ruiheng Liu, a graduate of Harvard University, and later the first Chinese dean of Peking Union Medical College, among others.While at the Northeast Anti-epidemic Bureau, Dr. Wu Lien-teh conducted groundbreaking research in the field of bacteriology by designing and successfully conducting ”Tarabagan Plague Inhalation Experiments”. These experiments confirmed that the Tarabagan plague could be transmitted through respiration, marking a significant advancement in the field. Building on a series of experimental studies, Dr. Wu Lien-teh completed ”A Treatise on Pneumonic Plague” (Geneva: League of Nations, Health Organization, 1926), a 480-page theoretical monograph on plague. This work established the theory of ”pneumonic plague” and laid the foundation for the classification of various types of plague, including bubonic plague, pneumonic plague, and septicemic plague. This treatise is hailed as a milestone in the theory of plague prevention and control.The establishment of the theory of pneumonic plague brought international recognition to its author. As a result, Dr. Wu Lien-teh was nominated as a candidate for the Nobel Prize in Physiology or Medicine in 1935. However, Dr. Wu himself remained indifferent to this recognition and did not utter a word about it. His children were also unaware of it. In 2007, the Singapore National Television — Asia News Television (Channel NewsAsia) planned to produce a three-part documentary series titled ”Dr. Wu Lien-teh: Plague Fighter,” with Ms. Wang Li-feng, the Vice President of International News at the channel, serving as the planner and scriptwriter. During the research process, they discovered the original documents recommending Dr. Wu Lien-teh as a Nobel Prize candidate. Dr. Wu’s daughter, Wu Yu-ling, was exceptionally excited upon learning about this and described the document as being unveiled for the first time.In his later years, Liang Qichao commented on Dr. Wu Lien-teh, saying, ”In the past fifty years of scientific endeavors, among the scholars who could meet the world on equal terms, there is only Dr. Wu Lien-teh!”Dr. Wu Lien-teh was later referred to by posterity as the ”Triple Scholar,” signifying the first Chinese to obtain a doctorate from the University of Cambridge, an imperial medical licentiate personally conferred by the emperor, and a plague fighter honored by the League of Nations Health Organization. This was the epitome of an extraordinary national figure.Even when summoned by three successive heads of state, Prince Regent of the Qing Dynasty, Yuan Shikai, and Chiang Kai-shek, to serve as Minister of Health, Dr. Wu declined. He opted instead for the position of Director-General of National Ports Quarantine.Dr. Wu Lien-teh discovered that many epidemics, including cholera and plague, were entering through the customs. At that time, the quarantine authority at the ports was in the hands of foreigners. Dr. Wu advocated for reclaiming control. The foreigners used to say that China had no scientists, but now when they looked at Dr. Wu Lien-teh, the internationally renowned plague fighter, they had no choice but to concede it to China. Dr. Wu Lien-teh personally drafted the country’s first port quarantine regulations, known as the ”Port Quarantine Regulations.” This was later hailed as the precursor of independent quarantine in China.The first to be reclaimed was the largest quarantine station in the country - the Shanghai Quarantine Station. Dr. Wu himself took up the post of director. He gradually regained control over quarantine authority at various ports. He delved into major ports to oversee and inspect quarantine work, train quarantine personnel, conduct scientific research, and enhance medical equipment and transportation. In the seven years from its establishment to the eve of the Anti-Japanese War, the management office had set up 20 service stations, quarantine hospitals, and laboratories at various ports, with over 2,000 beds. This formed a nationwide network. When infectious diseases spread, quarantine hospitals in various port cities actively participated in isolating and treating patients. This was especially significant in areas without infectious disease hospitals. In just seven years, Dr. Wu elevated China’s quarantine standards to an international level, making it a first-class quarantine institution in Southeast Asia. The success of China’s current port quarantine efforts, in terms of sovereignty, unified command, and operational capacity, is inseparable from Dr. Wu Lien-teh’s unwavering and diligent efforts.Later, he not only prevented two major outbreaks of cholera in Harbin but also, while overseeing customs quarantine in Shanghai, averted the largest cholera epidemic in China. Moreover, the death rate from cholera was much lower in China compared to countries like England, America, France, and Japan at the time. It can be said that Wu Lien-teh’s research and prevention efforts against epidemics were of the highest standard in the world at that time.As a leading figure in the Chinese medical community, Dr. Wu Lien-teh collaborated with the Rockefeller Foundation to establish Peking Union Medical College, which is now known as China Union Medical University. This institution played a crucial role in training a large number of medical professionals in China. Dr. Wu was also the first to propose the creation of the China Medical Association. Alongside Yan Fuqing and others, he co-founded the association and served as its first and second president. He initiated the publication of the Chinese Medical Journal and became its first editor-in-chief.Dr. Wu personally spearheaded the establishment of the most modern hospital in China at the time - Beijing Central Hospital, which is now known as Peking University People’s Hospital. He served as the first hospital director for four years. In total, Dr. Wu led the establishment of 20 quarantine stations, hospitals, and research institutes, providing a total of 2,387 beds. In addition to the Beijing Central Hospital, other significant establishments included epidemic hospitals set up in various parts of Northeast China in 1912, the Northeast Army Hospital, commissioned by Zhang Zuolin, which was the largest in the country at the time, and quarantine hospitals established at various ports under the management of the National Quarantine Service after 1930. In 1926, he also founded the Binjiang Medical Specialized School, which was later renamed Harbin Medical University in 1938.Furthermore, after graduating from the University of Cambridge, Dr. Wu Lien-teh consistently stood at the forefront of the anti-drug movement. Whether in his birthplace of Malaysia and Singapore, or in China, the United Kingdom, the United States, and other countries, he staunchly advocated for drug prohibition. He can be considered a pioneer of modern drug prohibition. In this endeavor, he invested a significant amount of effort and dedication, determined to eradicate drugs from the countries he visited. However, despite his utmost efforts during his lifetime, the proliferation of drugs remained a matter of great regret and frustration for him.Dr. Wu Lien-teh, together with Wang Ji-min, co-authored a book in English titled ”History of Chinese Medicine.” This book broke through the ethnic biases of Western scholars, allowing people to witness the glorious era of Chinese medicine. It filled the gap in which Chinese scholars had not previously introduced the history of Chinese medicine to the world in English. The book objectively presents the development of medicine in China, thus advancing the study of Chinese medical history. As a pioneering work, it has had a significant impact on the international history of medicine and is still considered a reference book in the field. Especially with regards to the development of modern medicine in China, including primary source materials on the research of plague and cholera conducted by the Northeast Anti-Epidemic Plague Bureau, as well as a wealth of data from the port quarantine, it has become essential reading for future generations studying the history of modern medicine in China. Due to this contribution, Dr. Wu was appointed as a Corresponding Fellow of the International Academy of the History of Science, and to this day, there are fewer than ten Chinese individuals who hold this title in the International Academy of the History of Science.The methods of isolation, disinfection, and wearing masks that are currently employed during epidemic outbreaks all draw from the strategies used by Dr. Wu Lien-teh to combat the Great Epidemic of Northeast China. It’s also worth noting that the rotating dining table we use today was invented by Dr. Wu Lien-teh. His contributions have had a lasting impact on public health practices worldwide.Before Dr. Wu Lien-teh passed away, he wrote his autobiography in English, titled ”Plague Fighter: The Autobiography of a Modern Chinese Physician.” It was published by Cambridge University Press and gained worldwide renown. His autobiography can be found in major libraries in the United States and the United Kingdom, but curiously, not in major libraries in China. It’s worth noting that all of Dr. Wu Lien-teh’s research and work took place on Chinese soil. Over the course of 30 years, from the age of 28 to 58, he devoted the best years of his life to China, benefiting the Chinese people. When I introduce Dr. Wu Lien-teh to people, most of them say, ”Is Dr. Wu Lien-teh Chinese, or is he a Chinese expatriate? There are so many Chinese expatriates like him, such as Yang Zhenning, Ding Zhongxing, and even more recently, Nobel laureate Qian Yongjian, etc.” (I posted many students’ replies on DXY). I feel deeply saddened when I hear such remarks, because Dr. Wu Lien-teh is so internationally renowned. In his autobiography published by Cambridge, he clearly states that he is a Chinese. The title of his book is ”Plague Fighter: The Autobiography of a Modern Chinese Physician.” Yet, we have revoked Dr. Wu Lien-teh’s Chinese citizenship. I believe that today’s university and graduate students, in addition to mastering their professional knowledge, really need to enhance their humanistic cultivation. Many outstanding students aspire to go abroad and hope that the country will invest in them, but they may not think about what they can contribute to our beloved motherland and the hardworking Chinese people. Of course, Yang Zhenning, Ding Zhongxing, Qian Yongjian, and others are all very great, but what sets Dr. Wu Lien-teh apart from them is that he dedicated all his contributions to us Chinese people, truly benefiting the Chinese people. The person the Chinese people truly appreciate is Dr. Wu Lien-teh. Without Dr. Wu Lien-teh’s efforts to take control of the ports in Northeast China and stop the rat-borne plague that could have devastated the land of China, we really don’t know what China would be like now. Just look at the current global panic caused by the outbreak of swine flu in Mexico. We can see that the truly frightening thing in today’s world is a major epidemic. Dr. Wu Lien-teh was an international authority in this field. In an era without antibiotics, when people had little understanding of modern medical knowledge, Dr. Wu Lien-teh not only eradicated the Great Epidemic of Northeast China, which claimed the lives of nearly 60,000 Chinese people, in less than four months, but he also effectively prevented major cholera outbreaks multiple times. I believe Dr. Wu Lien-teh’s contributions to the Chinese people are truly immense. It’s a great pity that very few Chinese people know his name, including fellow medical professionals and students who work in the same field as Dr. Wu. Every time I think about this, my emotions are truly hard to calm.On January 21, 1960, at No. 39 Lorong Kinta, Penang, a humble yet extraordinary retired physician passed away. Dr. Wu Lien-teh, aged 81, departed with serenity and composure. Very few of the people in the homeland he once served knew of him. Despite his strong confidence in New China and his early decision to donate his residence in Beijing to the nation for use by the Chinese Medical Association, he chose to live out his days as a simple physician, foregoing the accolades he rightfully deserved.In 1983, in the ”Dictionary of Epidemiology” edited by the renowned epidemiologist Last, the only Chinese name mentioned is Wu Lien-teh.Today, Wu Lien-teh does not live on in the hearts of us Chinese. Very few people know who he is, and those who do have only a vague knowledge about him. Wu Lien-Teh: “The Old China, to which the author had devoted the best part of his life, from the later days of the Manchu Dynasty through the formative years of the Chinese Republic until the collapse of the Kuomintang regime, is still fresh in the minds of many, and it is hoped that the ascendency of the new Chines People’s Government may result in the continued happiness and prospersity of that great country, which in the course of its 4000-5000 years of history has seen so many triumphs and vicissitudes before achieving its present status in this everchanging world.” 
Analysis and evaluation of seed kernel oil content and fatty acid components of Acer...
Minhao Han
Liping Yan

Minhao Han

and 5 more

October 31, 2023
In order to screen out the high-oil Acer truncatum germplasm resources so as to improve the yield and value of seed oil, this experiment was carried out by analyzing and evaluating a total of 70 samples from natural populations of A. truncatum in nine Central Plains of China, the results were subjected to nested ANOVA and correlation analyses, as well as a comprehensive evaluation of the various groups using principal component analysis and the affiliation function method. The findings demonstrated that the 70 samples ranged in seed kernel oil content from 14.43% to 50.11% (average 33.11%), and that the major fatty acid fractions had coefficients of variation that ranged from 24.13% to 33.40%, with differences between them being significant. According to correlation analysis, latitude, temperature, and precipitation had a greater impact on the seed kernel oil content than they did on the relative content of fatty acid fractions. Altitude, temperature, and precipitation were the primary causes of changes in the content of fatty acid fractions. The principal component analysis reduced the nine indexes to two principal components with a cumulative contribution rate of 84.29%, and ranked them according to the comprehensive evaluation value obtained from the principal component analysis and the transformation of the affiliation function. The analysis screened out the ten germplasm samples with the highest comprehensive quality and the three samples with the highest comprehensive evaluation value.
The role of pacemaker in the prevention of atrial fibrillation in patients with sick...
Fuat Polat
Barış Yaylak

Fuat Polat

and 5 more

October 31, 2023
Objective: This retrospective study examined the relationship between atrial pacing parameters and atrial fibrillation (AF) occurrence in patients with sick sinus syndrome (SSS) who received dual-chamber pacemakers. Methods: Sixty SSS patients who underwent dual pacemaker implantation were studied. Demographics, clinical data, and device information were collected, and patients were followed for up to 2 years post-implantation. Statistical analyses assessed the association between atrial pacing parameters and AF development. Receiver operating characteristic (ROC) analysis identified potential predictors of AF, focusing on atrial pacing frequency and mode switch episodes. Results: Higher atrial pacing frequency significantly reduced AF risk at all time points (p<0.001), while lower pacing rates did not correlate with AF incidence. The number of atrial premature beats and mode switch episodes showed significant correlations with AF occurrence in the early post-implantation period but lost significance over time. Multivariable Cox regression analysis indicated that the number of atrial premature beats had no significant effect on AF development. However, an inverse relationship was observed between atrial pacing frequency and AF occurrence in the first and third months post-implantation. Conclusion: Maintaining a higher atrial pacing frequency emerges as a valuable strategy to reduce AF risk in dual-chamber pacemaker recipients with SSS. Notably, atrial premature beats and mode-switching episodes primarily influenced AF risk during the early post-implantation phase. This underscores the importance of monitoring and optimizing atrial pacing parameters, especially in the initial stages following pacemaker implantation, for effective AF management in SSS patients.
Preclinical Diagnosis of Schizophrenia using EEG Time-Frequency Analysis During Motor...
Tamilarasi K
SENTHIL KUMAR G

TAMILARASI K

and 1 more

October 31, 2023
Schizophrenia is a severe mental illness that impairs the way a person perceives reality related to behavior, emotions, and thinking (cognition). Patients experience auditory hallucinations, delusion, and sleep deprivation. Although the Diagnostic and Statistical Manual (DSM) IV version helps in diagnosis, the lack of clinical tools available leads to delayed diagnosis. To ease preclinical diagnosis, this study conducted two tests, namely Motor Function Test (MFT) and Verbal Fluency Test (VFT). The neural activity of the brain during these two tests is captured by an Electroencephalogram (EEG). However, EEG signals are not widely used for clinical analysis, as the signals are blurred during acquisition, random, and shortcoming of the signal processing algorithm. Hence, in this paper, we propose a Preclinical Diagnosis of Schizophrenia using Multi-SynchroSqueezing Transform (MSST) (PDS-M) to analyze the blurred EEG signal with Time-frequency analysis. PDS-M produces a sharper signal and achieves perfect signal reconstruction. The mono component of MSST in each mode is termed intermediate frequency and it is used as the feature (such as lack of emotion, hallucinations, or disorganized thinking) for discriminating schizophrenic subjects from normal ones. The results show that the MFT is better than the VFT for preclinical study and this study also suggests that MSST is more suitable for time-frequency analysis of EEG signal since all the three modes’ multi-components are different from normal having a low p-value of p=0, p=0, and p=0.008, respectively, where p is the probability of data having occurred under the null hypothesis of a statistical test
Crustal Imaging with Noisy Teleseismic Receiver Functions Using Sparse Radon Transfor...
Ziqi Zhang
Tolulope Olugboji

Ziqi Zhang

and 1 more

November 08, 2023
A document by Ziqi Zhang. Click on the document to view its contents.
Combustion characteristics and flame stability of propane-air mixtures in flow tube r...
Christopher Brown
Junjie Chen

Christopher Brown

and 1 more

November 08, 2023
The characteristics of catalytically stabilized combustion in micro-scale heat-recirculating systems remain poorly understood and warrant further study due to extremely complex interactions not only between kinetics and transport but also between heterogeneous and homogeneous reactions. This study is focused mainly upon the essential combustion characteristics of propane-air mixtures in flow tube reactors with a heat-recirculating structure. Computational fluid dynamics simulations are performed to gain a greater understanding of the mechanisms of flame stabilization. The essential factors affecting flame stability and combustion characteristics are determined in order to obtain design insights. The results indicate that both chemical and thermal environments are improved with the catalytically stabilized combustion method and the heat-recirculating structure. The design incorporates the best features of both catalytic combustion and thermal flame methods. The system is essentially free of mass transfer limitations. The flow velocity, wall thermal conductivity, equivalence ratio, exterior heat losses are important factors in determining the performance of the system. Stable operation of the system is limited to a relatively wide flow regime, and the flow velocity is critical to achieving flame stability. There is an optimum wall thermal conductivity in terms of flame stability. The system with a moderate wall thermal conductivity will be most robust against the surrounding conditions. Excess enthalpy combustion can occur in an efficient and rapid manner, resulting from the injection of free radicals and heat produced by the catalytic reaction. Blowout shifts homogeneous combustion downstream significantly without substantially reducing the reaction rate.Keywords: Combustion characteristics; Flame stability; Heat recirculation; Catalytic combustion; Homogeneous combustion; Computational fluid dynamics
Numerical approximation method for hybrid non-linear Caputo fractional differential e...
Khaled Ben Amara
Maria Isabel Berenguer

Khaled Ben Amara

and 1 more

October 31, 2023
We address the problem of existence, uniqueness and approximation of the solution of a large class of fractional integral differential equations with boundary conditions. Based on fixed point techniques with Boyd-Wong type conditions, the existence and uniqueness of the solution is investigated. This, together with the use of certain types of biorthogonal systems, allows us to propose a method to approximate the solution which is tested with several examples.
Axillary lymph node metastasis from squamous cell lung cancer: an unusual site of met...
Ayat   Aljuba
Balqis   Shawer

Ayat Aljuba

and 5 more

October 31, 2023
Axillary lymph node metastasis from squamous cell lung cancer: an unusual site of metastatic spread: A case report 
Experiments On The Acquisition Of Scalar Quantity Implicatures: A Systematic Review
Anna Teresa Porrini
Luca Surian

Anna Teresa Porrini

and 1 more

October 31, 2023
The present study is a systematic review of experimental data on the acquisi-tion of scalar implicatures. It aims to provide an overview of available exper-imental evidence and an assessment of the various factors affecting children’s performance. This research also provides a demonstration of how useful sys-tematic reviewing can be as a methodology to analyse data in the field of ex-perimental linguistics. Only peer-reviewed, empirical articles published in English were included using the PRISMA method for systematic reviews, and the data from 44 references were analysed. The results show that children’s performance improves as they grow older, but that while above-chance per-formance is detected already at 3 years of age for ad-hoc scalar implicatures, lexical scales remain difficult for children at least until age 5. Importantly, the task used also appears to be a significant factor in children’s performance: judgment tasks are more difficult for children than tasks that do not require meta-linguistic skills.
Digital Pixel Based Event Vision Sensor with Simultaneous Event and Intensity Outputs
Wen Tianye
Jian Lu

Wen Tianye

and 3 more

October 31, 2023
In this letter, we report the design of a low-power event-based vision sensor (EVS) digital pixel in a 3D-stacked 45-nm backside illumination CMOS process. The design uses in-pixel analog-to-digital converters and memory to store digitized light intensities. By using a bit comparator to compare digital intensity values of the same pixel in the time domain, the high-fidelity event stream and intensity information from the same pixel can be generated simultaneously. The power consumption of the proposed digital EVS pixel can be as low as 10 nW/pixel. The EVS sensor can achieve a maximum event rate of 260 Meps.
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