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not-yet-known not-yet-known not-yet-known...
Sertan Cengiz
Büşra ERDEM

Sertan Cengiz

and 4 more

July 16, 2024
The increasing demand for efficient juice extraction processes in response to rising global fruit product consumption underscores the importance of enzyme-mediated approaches, particularly utilizing pectinases, in enhancing extraction efficiency by breaking down plant cell wall components. This study focuses on investigating pectinase production from different Aspergillus spp. strains isolated from natural resources in Ankara, Turkey. By screening these strains, this research aims to broaden the spectrum of working conditions adaptable to diverse extraction processes. Emphasizing optimal performance in acidic environments and high temperatures prevalent in fruit juice extraction, the study isolates, and screens Aspergillus spp. strains, conducts pectinase assays, and identifies the most promising strain, Aspergillus brasiliensis, with substantial enzyme activity. Fermentation experiments further elucidate optimal conditions for enzyme production. Results reveal significant enzymatic activity under acidic and high-temperature conditions, with the chosen isolate exhibiting remarkable enzyme activity and specific activity at varying temperatures and nitrogen sources. This investigation highlights the potential of different strains and their enzymatic capabilities to propel innovation in various biotechnological domains, promising advancements in fruit processing and related industries.
Electrochemical Beckmann Rearrangement Mediated by DDQ
Ren-Yu Tian
Mohammad Haqmal

Ren-Yu Tian

and 5 more

July 16, 2024
Beckmann rearrangement, a classical reaction of introducing nitrogen to carbon skeleton compounds, is widely used in acadimia and industry. Herein, an electrochemical Beckmann rearrangement is reported, utilizing 2,3-dichloro-5,6-dicyano-1,4-benzoquinone (DDQ) as a mediator to prevent the over-electro-oxidation of products, which could afford amide in excellent yield.
Functionalized Ti3C2Tx assisted by natural phytic acid for high-power application in...
Jianjian Zhong
Zhen Wang

Jianjian Zhong

and 3 more

July 16, 2024
Two-dimensional transition metal carbides/nitrides (MXenes) have become a hotpot for energy storage, which possess desirable surface chemistry property and conductivity. However, MXenes presents a lower capacity and deteriorative cycle performance due to surface passivation and Van der Waals’ force. Herein, the self-oxidized PA@Ti3C2Tx materials are developed via the functionalization with phytic acid. The derived anatase TiO2 structure endows the material with stubborn lithium-ion migration pathway and satisfactory electrochemical reversibility. The self-sacrifice of outer Ti layers is confirmed by the evolution of lattice fringes extending from the inside to the outside, and the break of Ti-C bond provides the sites for the combination with phosphorus. The rapid charge transfer and reduced energy barrier induced by Ti-O-P bond also enhances the lithium-ion diffusion kinetics. The 1/2PA@Ti3C2Tx material shows promoted rate performance of 180.2 mAh g–1 at 3000 mA g–1. The assembled lithium-ion capacitor also acquires a superior energy density of 344.3 Wh kg–1 at the power density of 73.7 W kg–1, and maintains the energy density of 65.7 Wh kg–1 at the power density of 6836.3 W kg–1. This strategy of structure regulation via self-oxidation can effectively improve the high-power performance of MXenes in lithium-ion capacitors.
Trampling to biocrusts reduced soil microbial biomass and altered soil microbial comm...
Yanmei Liu
* HangyuYang

Yanmei Liu

and 4 more

July 16, 2024
Biocrusts occupy the surface of soils, house key microbes and non-vascular plants, and further provide other vital ecological functions in oligotrophic drylands. However, little is known about the impact of trampling on fragile biocrusts in temperate deserts, particularly changes to soil microbial communities. To examine this, fresh soils from three trampled intensities to biocrusts were sampled in vegetation areas of the Tennger Desert. Soil microbial biomass carbon and nitrogen, and microbial communities were studied using chloroform fumigation and Illumina sequencing, respectively. The results collected 2050 OTUs and 393 species of bacterial communities and 1124 OTUs and 135 species of fungal communities. Severe trampling of biocrusts resulted in a reduction in soil microbial biomass carbon and nitrogen, and soil microbial abundance and diversity; changed the relative abundance of microbial taxa; altered the soil microbial community structures of cyanobacteria-dominated crusts, and further affected microbial community functions. Reduced soil moisture and nutrients and enhanced pH were the factors which caused alteration in soil microbial communities after trampled biocrusts. In addition, there was a negative correlation between trampling intensity with soil nutrient content, soil microbial biomass carbon and nitrogen, and microbial abundance. After similar trampling intensity, later-succession moss-dominated crusts were significantly higher in soil nutrients, soil microbial biomass carbon and nitrogen, soil fungal abundance and diversity, and more distinctive microbial community structures compared to early-succession cyanobacteria-dominated crusts. This suggests that there is a positive correlation between biocrust tolerance to trampling and the successional stages of biocrusts. Therefore, severe trampling of biocrusts could modify biocrust fragile structures and functions, which in turn, altered soil microbial community compositions and structures, and discouraged their function, leading to a degradation process of surface soils in temperate desert ecosystems.
Wide frequency multiphase oscillator designed by coupling two identical ring voltage...
mohammad jafar hemmati
Sepehr Ebrahimi Mood

mohammad jafar hemmati

and 2 more

July 16, 2024
This work describes a novel wide tuning range ring voltage controlled oscillator (RVCO) for generating six-phase signals. The proposed circuit is realized by coupling two identical three-stage single-ended inverter based RVCOs. The coupling network injects the common mode signals from one RVCO to the other one and vice versa in cross-connected manner. Three-stage RVCOs used for coupling have been configured by modifying the conventional current-starved RVCO. The proposed six-phase RVCO is optimized using an improved version of Non-dominated Sorting Genetic Algorithm III (NSGAIII). In this algorithm, sigma scaling method is used to control the selection pressure and enhance the performance of the algorithm. The proposed RVCO oscillates at 4.3 GHz. The proposed oscillator can operate from 1.65 GHz to 4.62 GHz under the supply voltage of 1.5 V. This oscillator demonstrates a wide frequency tuning range of 95 %. The proposed RVCO has been designed in 0.18 µm standard CMOS technology and the chip area is 28 × 38.5 µm 2.
Effects of Soil and Water Conservation Practices and Slope Gradient on Selected Soil...
* Getachew Tadie
Getachw Dessalegn

* Getachew Tadie

and 1 more

July 16, 2024
Various soil and water conservation practices (SWCPs) have been implemented in Ethiopia, but their sustainable utilization remains below desired levels, leading to ongoing soil erosion issues. A study was carried out in Guna Begemider district, within the Guna watershed in North Western Ethiopia, to assess the impact of SWCPs and slope gradient on specific soil physicochemical properties. Comparing land that has been conserved using soil conservation practices to land that has not been conserved on the same slope. The effects of SWCP were once again studied on three different slope gradients: 5-10% for lower slope, 10-15% for middle slope, and 15-30% for upper slope, as well as two soil depths. The study followed a Randomized Complete Block Design (RCBD) with a total of 36 soil samples taken from 0-20 cm and 20-40 cm depths, replicated three times. The physical and chemical properties were examined at the laboratory services of Amhara Design and Supervision Work Enterprise. The results of the study showed that soil bulk density (BD), soil pH, soil organic matter (SOM), total nitrogen (N), available phosphorus (Av-P), cation exchange capacity (CEC), and exchangeable cations (Na+, K+, Ca2+, except Mg2+) were significantly different (P < 0.05), with the land conserved by soil conservation practices showing better conditions than the non-conserved control under the three slope gradients and the two soil depths. No significant difference was observed in terms of soil texture between the conserved and non-conserved lands, but there were significant differences among the slope gradient. The highest basic cations concentration and pH were found at the bottom (lower) slope position. Minimum organic matter was found in soils of lower sloping areas. Biological conservation practices, especially root branched grass species and nitrogen-fixing species, within the proper maintenance of conservation measures should be maximized.
PE-based High Throughput and Low Power Polar Encoder for 5G-NR PBCH Channel
Zhiyi Zeng
Haiyu Xiao

Zhiyi Zeng

and 5 more

July 16, 2024
In this paper, we propose a PE-based parallelism configurable polar encoder hardware architecture for emerging high-speed 5G communication system. This encoder architecture is applied to the 5G-NR PBCH channel polar encoder, implemented with functional modules such as CRC generation and interleaving, channel encoding, and rate matching as specified in the 3GPP protocol. Next, based on the united power format (UPF) low-power management technology, the PBCH polar encoder architecture is divided into different power domains based on their operating characteristics to reduce the power consumption. Experimental results show that the proposed polar encoder achieves throughput up to 30 Gbps. Based on TSMC 40 nm CMOS technology, by applying the proposed low-power methodology, the power consumption of the PBCH polar encoder at parallelisms of 8, 16, and 32 are 1.236 mW, 1.170 mW, and 1.084 mW, achieving power reductions of 24%, 29%, and 35% when comparing to non-low-power design, respectively.
Identifying cryptic mammals with non-invasive methods: an effective molecular species...
Amy Wong
Eduardo Eizirik

Amy Wong

and 9 more

July 16, 2024
Carnivores play a vital role in ecosystem health and are thus an important focus for conservation management. Non-invasive methods have gained traction for carnivore monitoring as they are often elusive and wide-ranging, making visual counts particularly difficult. Faecal mini-barcoding combines field collection of scats with genetic analysis for species identification. Here we assessed the applicability of a mini-barcode based on the mitochondrial ATP6 gene in southern Africa. We predicted amplification success based on in silico evaluation of 34 of the 42 terrestrial carnivore species existing in southern Africa, including the Congo clawless otter (Aonyx congicus) for which we contributed a mitochondrial assembly, and tested amplification success on available reference samples of 23 species. We expanded the existing ATP6 mini-barcode reference database by contributing additional sequences for 22 species including the Cape genet (Genetta tigrina) and the side-striped jackal (Lupulella adusta), for which no complete mini-barcode sequences were available on GenBank to date. We furthermore applied the ATP6 mini-barcode to a scat-based carnivore survey conducted in 2009 in a grassland habitat in Namibia, showing a 94.9% identification success. Six carnivore species were detected from157 samples and were predicted to account for 75% of species assemblage. Black-backed jackals (Canis mesomelas) contributed the majority of faecal samples (87.2%) and were distributed evenly throughout the area. Scat samples of the remaining species, including leopard (Panthera pardus), were distributed along the edge, in proximity to dense bushland.
Tropical cyclone migration mitigates the impact of climate change on cool-temperate a...
Jan Altman
Kirill Korznikov

Jan Altman

and 1 more

April 06, 2024
The poleward migration of tropical cyclones (TCs) inevitably triggers unprecedented ecological consequences for cool-temperate and boreal forests, including shifts in species distribution, global carbon dynamics, or forest policies. However, our current understanding of the impact of TCs’ expansion into new regions is limited and lacks attention by both, the media and research community, compared to TCs’ impact on (sub-)tropical forests. We suggest that TCs should not only be perceived as destructive weather phenomena but also as vehicle mitigating the impact of climate change on forest ecosystems via enabling the forest transition and reducing the negative impact of prolonged drought periods. Hence, it is vital to establish globally coherent long-term and large-scale research to capture unique ongoing (and currently overlooked) ecological processes induced by TC migration, which may lead to a complex unprecedented forest transition dynamic.
Drivers for implementing e-claim process of improved Community Health Fund from two d...
Furaha Mwakafwila J
Malale Tungu

Furaha Mwakafwila J

and 3 more

July 16, 2024
Background: In most Low and Middle-Income Countries (LMICs), enrolment in community-based health insurance (CBHI) is still low. In Sub-Saharan Africa enrolment rate is less than 10%. In 1996, Tanzania introduced Community Health Fund (CHF) which was modified in 2011 whereby the government came up with the improved community health fund (iCHF). The introduction of iCHF was intended to improve service delivery to the population where an electronic integrated management information system was introduced. Objective: This study was set to explore the drivers for implementing the e-claim process of improved Community Health Funds from two districts in Central Tanzania. Methods: An exploratory case study design using a qualitative approach was adopted to explore information on the drivers of the implementation of the iCHF electronic claim process in Mkalama and Iramba districts in Singida region. In-depth interviews were used to collect data from the Eighteen (18) participants including regional health managers, district health managers, Information Technology (IT) officers, facility in charge and iCHF focal persons from dispensaries, health centres and hospitals. Data were analyzed using a thematic content analysis. Results: The drivers for implementing the iCHF e-claim process were adherence to supervision directives and government policy, resource management and client satisfaction but the e-claim system does not attract Health Community Workers (HCWs) to comply with the iCHF e-claim process Conclusion: The iCHF e-claim process is inadequately implemented and does not attract Health care workers (HCWs) due
Gut microecology of four sympatric desert rodents varies by diet
Dongyang Chu
Shuai Yuan

Dongyang Chu

and 9 more

July 16, 2024
The gut microbiome can be one pathway by which a host rapidly acclimates and adapts to its ecological environment. Exploring how the microbiome has evolved to differ between hosts with different diets provides insights into the profound interactions between hosts and microbes within these systems. In this study, we used DNA metabarcoding techniques and macrogenomic prediction techniques to study the gut microbes of four desert rodent species with different feeding strategies in the same habitat. One species is herbivorous (Spermophilus alashanicus), one is seed-eating (Phodopus roborovskii), another is omnivorous (Dipus sagitta), and the last (Orientallactaga sibirica) has a diet with a relatively high proportion of meat. Diets rich in plants and insects can be challenging to digest due to the abundance of indigestible fiber and stable chitin, respectively. Out of the species studied, the herbivorous Spermophilus alashanicus has the highest density of UCG-005 genes and the highest predicted abundance of genes related to digestive complexity. The composition of Phodopus roborovskii’s microbiome has the highest variation between individuals, yet Phodopus roborovskii has the highest predicted abundance of genes associated with simple sugars—reflecting this species’ potential adaptability to the fiber within plant seeds and its constraints brought about by its smaller body size. The most insectivorous species, Orientallactaga sibirica, exhibits the highest predicted abundance of genes related to chitin degradation. This study has enhanced our understanding of the gut microbiota in the intestines of rodents as they adapt to various dietary strategies.
Development and validation of a prognostic model for COVID in-hospital mortality in M...
Diego Yahir Arriaga-Izabal
Adrian Canizalez-Roman

Diego Yahir Arriaga-Izabal

and 1 more

July 16, 2024
A document by Diego Yahir Arriaga-Izabal. Click on the document to view its contents.
Aetiology of pelvic neuropathies in women: a scoping review
Robert de Leeuw
Emma Don

Robert de Leeuw

and 6 more

July 16, 2024
Background: Many women suffer from undiagnosed pelvic pain, potentially due to pelvic neuropathies, but are often treated symptomatically without addressing underlying causes. Pelvic neuropathies can cause severe symptoms, affecting quality of life and psychological well-being. Objectives: To provide an overview of all known aetiologies of pelvic neuropathies. Search Strategy: Database searches of PubMed, Embase.com, and Web of Science (Core Collection), as well as citations and reference lists published up to November 13, 2023. Selection criteria: For inclusion, the study needed to describe an aetiology of a located pelvic neuropathy that can occur in women. Excluded studies were those describing idiopathic neuropathy, reviews, and opinion articles. Main results: In total, 306 studies were included (268 case reports and series, 38 cohort studies), describing 2413 patients. Aetiologies of the included studies were divided into five categories and their subcategories, namely: iatrogenic (n=1094 patients, 45%), nerve invasion - mainly endometriosis (n=614 patients, 25%), pregnancy and birth (n=93 patients, 4%), trauma (n=202 patients, 8%), and compression (n=409 patients, 17%). Pelvic neuropathies were mainly described in the sciatic, femoral, obturator, lumbosacral roots, pudendal, lateral femoral cutaneous, and Ilioinguinal nerve. Conclusions: The vast majority of all described pelvic neuropathies were seen after surgery in the lower abdomen or pelvis. The second largest group of patients exhibited neuropathy caused by deep endometriosis of the sacral plexus and/or sciatic nerve. The five categories from this paper can assist clinicians in diagnosing and treating neuropathic pelvic pain. Funding: This study was not funded.
Ecological Impacts of Single-Axis Photovoltaic Solar Energy with Periodic Mowing on M...
Yudi Li
A Armstrong

Yudi Li

and 4 more

July 16, 2024
Large, ground-mounted photovoltaic solar farms (GPVs) are expanding worldwide to support climate change mitigation and the transition towards a low-carbon economy. Few studies have explored the ecological impacts of tracking GPVs and maintenance activities for utility-scale operations on microclimate and vegetation patterns. Here, we explored the ecological impacts of a single-axis, tracking GPV and regular mowing in the Great Central Valley of California, United States. First, we developed an experimental framework of five unique “micro-patches” that characterize the heterogeneity of the dynamic microclimate and vegetation zones created by a single-axis, tracking GPV. Across these five micro-patch types, we evaluated nine above- and below-ground microclimate variables and 16 vegetation properties. We found that the micro-patches under PV panels reduced photosynthetic active radiation and wind speed by 90% and 46%, respectively, compared to open spaces along the facility perimeter. In contrast, soil surfaces in the open spaces were warmer and experienced faster soil moisture loss than micro-patches near or within array footprints during drought seasons. We found no significant difference in air temperature, relative humidity, and vapor pressure deficit across all micro-patches daily. We identified 37 plant species, of which 86% were exotic. Fully exposed to higher incoming solar radiation, plant communities in the open spaces experienced senescence the earliest compared to other micro-patches. We discuss the implications of our results for managing single-axis, tracking GPVs, particularly activities seeking to achieve enhanced control of the noxious weeds and other ecologically beneficial outcomes.
Identification the Disturbances of Inertially Stabilized Platform and Control System...
Yang Liu
Zhendong Zhang

Yang Liu

and 3 more

July 16, 2024
In this study,we focus on a vehicle-mounted inertially stabilized platform for optical imaging systems,solve two key issues in control system design:how to design a system that meets the requirements of pointing accuracy and analyse whether the system has realizability.We propose a series of methods for disturbance identification,controller design,and control system realizability analysis. First, we analyse the disturbances in typical use cases, about the composition of the signals, and the impact on the pointing accuracy, and propose performance indices for control systems that satisfy the pointing accuracy requirement. Second, we design a series of experiments to identify disturbances,and through kinematics modeling,direct measurement,indirect measurement and equivalents,we confirm the magnitude of the disturbances.Third, we propose design constraints on the robust performance of the stabilization and the track loops of an inertially stabilized platform,as well as an unreliable modeling index.Based on these constraints,we can analyse the realizability of the system during the design phase of a project and optimize mechanical structure, tracker, and controller. Finally, we use the identification results of the disturbances as the input for simulation, select a 10th-order modal model of an azimuth gimbal,and design control systems that satisfy pointing accuracy index.
Insulin Resistance vs Dysregulation -- A Distinction without a Difference
Eleanor Kellon

Eleanor Kellon

July 16, 2024
Insulin Resistance vs Dysregulation – A Distinction without a DifferenceEleanor M. Kellon, VMDEquine Cushing’s and Insulin Resistance Group, Inc.2307 Rural Road, Tempe, AZ 85282, USAdrkellon@gmail.comIn 2014, the term insulin dysregulation was introduced in an article by Frank and Tadros, published in EVE. It purported to cover all causes of “excessive insulin response to oral sugars, fasting hyperinsulinemia and insulin resistance” 1 . This was precipitated by interest in the enteroinsular axis and whether incretins might play a role in the excessive response to oral sugars, as well as decreased insulin clearance contributing to hyperinsulinemia. The paper also mentioned the stress response to illness, sepsis and injury as causing hyperinsulinemia but this is well recognized to be a physiological insulin resistance response to preserve glucose for critical tissues like heart and brain. Similarly, the hyperinsulinemia of pregnancy was recognized as a physiological response to allow ample access of the glucose to the fetus. The hyperinsulinemia of PPID is also recognized to be a combination of genetic predisposition and insulin resistance in response to the POMC hormones. This leaves only incretins and reduced insulin clearance as possible causes of hyperinsulinemia without insulin resistance.Higher insulin response to oral than intravenous glucose is a well recognized physiological response in all species, including the horse. Interest in incretins traces back to a 2001 study which determined higher insulin response to oral glucose than intravenous in both horses and Shetland ponies. There was one pony in the study with an exaggerated insulin response and higher GIP incretin (glucose-dependent insulinotropic polypeptide). However, that pony also had elevated absorption of glucose and insulinresistance status was unknown. In a 2016 study 2 , 31 ponies previously identified as hyperinsulinemic were evaluated to determine their active GLP-1 (glucagon-like peptide-1 incretin) and insulin responses to feeding glucose and compare that to the response to intravenous glucose. In phase one of the trial, 22 ponies determined to have hyperinsulinemic responses to oral feeding were subjected to a CGIT (combined insulin-glucose tolerance test). Only 15 of the 22 were determined to be IR by CGIT criteria. However, it has been shown that the diagnostic sensitivity of the insulin phase of CGIT is only 28.5%3 . In phase two, 9 other ponies were utilized. Those that had previously been identified as high responders to oral glucose were found to have the same insulin response to intravenous glucose as the normal ponies. However, they were also found to absorb more glucose orally than the normal ponies i.e., higher AUC glucose. AUC insulin following the oral tests was not correlated with AUC GIP but was correlated with AUC active GLP-1 while total GLP-1 did not change. Given the increased glucose absorption in those ponies, elevated GLP-1 is not an unexpected finding but rather was a normal and appropriate physiologic response to the enhanced glucose absorption, as was the higher insulin – not a dysregulation.Four studies since then have looked for a correlation between elevated levels of GLP-1 or GIP and a hyperinsulinemic response to oral carbohydrates in both normal and hyperinsulinemic horses but failed to find a significant difference. Most notably, one study 4 found the 75 minute insulin response to oral glucose was negatively correlated to GLP-1 and adiponectin levels were positively correlated to GLP-1, the exact opposite of what would be expected if exaggerated incretin responses could cause hyperinsulinemia without insulin resistance or could lead to insulin resistance.To further add to the confusion, both a GLP-1 mimetic and GLP-1 receptor antagonist have been reported to decrease the insulin response to a meal. Interestingly, in the case of the mimetic, the reduced insulin response was due to an increase in whole body insulin sensitivity, again directly contradicting the idea that incretins could cause hyperinsulinemia without there being insulin resistance.As for reduced insulin clearance, one study has documented reduced insulin clearance in horses with metabolic syndrome and hyperinsulinemia. This is a well-recognized component of human insulin resistance in metabolic syndrome and type 2 diabetes mellitus. The reduced insulin clearance helps spare the beta cells and compensate for cellular insulin resistance by maintaining higher circulating insulin levels and is thus an adaptive physiological response, not a dysregulation. There are no studies in any species documenting reduced insulin clearance without concurrent insulin resistance.In contrast, since the 2005 publication of insulin sensitivity quintiles using minimal model analysis of FSIGT (frequently sampled intravenous glucose tolerance test) data, over 40 articles have been formally published describing diagnosis of insulin resistance by intravenous response to glucose, insulin or their combination in various protocols, sometitmes with greater sensitivity than oral testing.It appears possible, but by no means proven, that some animals, particularly ponies, may over-absorb glucose, possibly under the influence of GLP-2, leading to exaggerated GLP-1 and insulin responses to meals and that this repeated exposure to high levels of insulin would lead to insulin resistance. However, even if this is shown to be true, it is not the insulin response that is dysregulated but rather glucose absorption. The GLP-1 and insulin responses to the enhanced glucose load are appropriate and physiological. The end result is likely insulin resistance from repeated exposure to high levels of insulin, as also described by Frank and Tadros, and could be considered an early stage of insulin resistance. They certainly wouldn’t be treated any differently than an animal with insulin resistance confirmed by intravenous testing.By creating an artificial distinction between horses and all other species with insulin resistance there is the potential to reduce interest in collaboration and funding. It also encourages avenues of research which are unlikely to ever benefit the horse or increase understanding of equine insulin resistance. The term insulin dysregulation should be abandoned as the other proposed mechanisms for hyperinsulemia have either not been proven, lead to insulin resistance or are known to be an inherent physiological response to insulin resistance.References:1. N. Frank and E.M. Tadros, Insulin dysregulation, Equine Vet J 46 (2014), pp. 103-112.2. M.A. de Laat, J.M. McGree and M.N. Sillence, Equine hyperinsulinemia: investigation of the enteroinsular axis during insulin dysregulation,Am J Physiol Endocrinol Metab 310 (2016), pp. E61-72.3. L.K. Dunbar, K.A. Mielnicki, K.A. Dembek, R.E. Toribio and T.A. Burns, Evaluation of Four Diagnostic Tests for Insulin Dysregulation in Adult Light-Breed Horses, J Vet Intern Med 30 (2016), pp. 885-891.4. N. Frank and D.M. Walsh, Repeatability of Oral Sugar Test Results, Glucagon-Like Peptide-1 Measurements, and Serum High-Molecular-Weight Adiponectin Concentrations in Horses, J Vet Intern Med 31 (2017), pp. 1178-1187.5. K.H. Treiber, D.S. Kronfeld, T.M. Hess, R.C. Boston and P.A. Harris, Use of proxies and reference quintiles obtained from minimal model analysis for determination of insulin sensitivity and pancreatic beta-cell responsiveness in horses, Am J Vet Res 66 (2005), pp. 2114-2121.
A climate envelope model for the projection of forest carbon storage on a global scal...
Diego Bengochea Paz
Alba Marquez-Torres

Diego Bengochea Paz

and 6 more

July 16, 2024
not-yet-known not-yet-known not-yet-known unknown Projecting how climate change will reshape global patterns of forest carbon storage is paramount to investigate the future of the global carbon cycle. Advances in machine learning and the proliferation of remote-sensing missions have stimulated the development of statistical models for the estimation of carbon storage on a global scale. However, existing models present two major limitations. First, they are not suitable for forecasting because they are trained on variables that cannot be projected. Second, they are based on large numbers of predictors, which hinders the interpretability and explainability of their results from a biological and ecological perspective. In this manuscript, we present a machine learning model for the global mapping of potential Aboveground Biomass Density that overcomes the above mentioned limitations. On the one hand, our model is based exclusively on bioclimatic variables and is therefore suitable for forecasting and interpretable from a biological perspective. On the other hand, we calibrated our model with a state-of-the-art predictor selection process to identify the optimal subset of predictors for the maximization of model accuracy. We found that a minimal model based solely on four bioclimatic variables performed the best. Furthermore, our model reproduces field measurements from experimental forest plots equally well than a state-of-the-art model trained on $190$ predictors. In conclusion, we provide a simple and computationally cheap model that can be coupled with climate projections to investigate how climate change will reshape carbon storage on a global scale.
A Case of Perinephric Pancreatic Pseudocyst Secondary to Pancreatitis
Mallick Zohaibuddin
Wasim Ahmed Memon

Mallick Zohaibuddin

and 9 more

July 16, 2024
1 INTRODUCTIONPancreatitis is associated with a range of local and systemic complications (1,2). However, fistula formation is noted in only a very small proportion of patients with acute pancreatitis (3). These fistulas are generally a result of disruption of the pancreatic duct, which may be due to several etiologies such as trauma, surgical trauma, pancreatic resection, or those causing pancreatitis (4). Pancreatic duct disruption results in fluid leakage, which causes erosion and formation of pathways, the locations of which depend on the anatomic location of the duct disruption (4). Management of pancreatic fistulas includes medical and nutritional optimization, surgical interventions, endoscopic treatments, and catheter drainage (3, 5-7).Pseudocysts associated with acute pancreatitis are loculated fluid collections that are rich in amylase and usually develop within 2 weeks of onset of pancreatitis (8). They may be intra- or extra-pancreatic, are inflammatory, and lack a true epithelial lining. Just like pancreatic fistulae, pancreatic pseudocysts generally develop secondary to disruption of the pancreatic duct, and resolve spontaneously unless they develop complications (8). The management of pancreatic pseudocysts includes but is not limited to, percutaneous, endoscopic, and surgical drainage among others (9-11).Among these complications, pancreatic pseudocyst stands as a rare but significant entity. A pancreatic pseudocyst represents an abnormal fluid collection originating from the pancreas and can arise as a consequence of acute or chronic pancreatitis and remains relatively uncommon in clinical practice.The clinical presentation of pancreatic pseudocyst may include abdominal pain, fever, and biochemical abnormalities indicative of pancreatic injury.In this report, we present a case of pancreatic pseudocyst formation secondary to pancreatitis in a 42-year-old male, highlighting the clinical presentation, diagnostic evaluation, therapeutic interventions, and outcomes. Through this case, we aim to underscore the importance of early recognition and appropriate management of pancreatic pseudocysts to prevent complications and optimize patient outcomes.
Linearity of Millimeter-Wave Graded-Channel GaN HEMTs under Quadrature Amplitude Modu...
Jeong Moon
Joel Wong

Jeong Moon

and 5 more

July 16, 2024
We report large-signal linearity and power-added-efficiency of high-speed graded-channel GaN-based HEMTs at 30 GHz under 64-QAM and 256-QAM at 6V or less operations. These graded-channel GaN HEMTs show the fT of 160 GHz and exhibit a peak power-added-efficiency of 55% at 30 GHz. Under the 64-QAM and 256-QAM, the error-vector-magnitude (EVM) of less than 5 % was measured at the average output power of 16 dBm, about 3 dB backed off from the saturated output power.
Prediction of influenza A virus-human protein-protein interactions using XGBoost with...
Binghua Li
Xin Li

Binghua Li

and 4 more

July 16, 2024
Influenza A virus (IAV) has the characteristics of high infectivity and high pathogenicity, which makes IAV infection a serious public health threat. Identifying protein-protein interactions (PPIs) between IAV and human proteins is beneficial for understanding the mechanism of viral infection and designing antiviral drugs. In this paper, we developed a sequence-based machine learning method for predicting PPI. First, we applied a new negative sample construction method to establish a high-quality IAV-human PPI dataset. Then we used conjoint triad (CT) and moran autocorrelation (Moran) to encode biologically relevant features. The joint consideration utilizing the complementary information between contiguous and discontinuous amino acids provides a more comprehensive description of PPI information. After comparing different machine learning models, the eXtreme Gradient Boosting (XGBoost) model was determined as the final model for the prediction. The model achieved an accuracy of 96.89%, precision of 98.79%, recall of 94.85%, F1-score of 96.78%. Finally, we successfully identified 3,269 potential target proteins. The Gene Ontology (GO) and pathway analysis showed that these genes were highly associated with IAV infection. The analysis of the PPI network further revealed that the predicted proteins were classified as core proteins within the human protein interaction network. This study may encourage the identification of potential targets for the discovery of more effective anti-influenza drugs.
A comparison of outlier detection methods for species distribution data, from geograp...
Jayme Lewthwaite
Shannon Brownlee

Jayme Lewthwaite

and 2 more

July 16, 2024
The rapid increase in the availability of occurrence data has led to a rapid increase in the analyses that make use of these data. Because these data often aggregate many surveying efforts including community science data and historic museum records, plenty of errors end up in aggregate databases such as GBIF. Data cleaning pipelines have mainly focused on the most common types of errors, such as erroneous coordinates, dates, and taxonomic names. However, other errors exist which are harder to identify. For example, data points that occur outside of known species ranges or outside plausible distributions. In order to identify these errors, a strong collaboration between data analyzers and taxon experts is needed, as these data points often need to be painstakingly identified one-by-one. To ensure the reliability of the data, this often needs to be repeated whenever new data becomes available. Given the continuous (and often exponential) increase in data each year, finding ways to expedite the identification of these outliers is imperative. The rapid advancement of machine learning tools may be an invaluable approach to harness for this task. Using a manually-cleaned set of 147 butterfly species with labeled true outliers, we compared the ability of multiple methods (which varied from using simple regional checklists and ecoregions to neural networks) to identify these true outliers. Since we used real species data, we also evaluated distribution properties that may affect classification. Because these outliers tend to be relatively rare, classifiers and neural networks tended to perform worse than simple filtering based on ecoregion. We identified ways to improve classification accuracy, such as subsampling, yet even after these improvements simple filters still outperform more complex models. While previous studies have used simulated data to test methods for outliers, we found that real observational data is more unbalanced than previously simulated.
Unveiling Robust Dihydroxyacetone Production Using Post N2-annealed BiVO4 Photoanode
Yeji Lee
Yeseul Jo

Yeji Lee

and 2 more

July 16, 2024
Photoelectrochemical conversion of glycerol into high-value dihydroxyacetone offers a sustainable approach via BiVO4, which manifests highly photoactive properties, but poor charge transport ability. Herein, we fabricated N2-annealed BiVO¬4 through a simple spin-coating method and N2 annealing process. The effect of N2 treatment did not significantly impact the surficial catalytic efficiency, while the bulk efficiency was increased, resulting from changes in oxygen vacancy concentration and carrier density. Owing to simultaneous improvement in bulk electron-hole separation efficiency, N2-annealed BiVO4 at 150 ℃ exhibited an enhanced photoelectrochemical dihydroxyacetone production rate of 160 mmol m-2 h-1 at 1.0 V vs. RHE, which was about more than 2 times higher than pristine BiVO4. This work not only makes biodiesel production more profitable and sustainable but also achieves advanced production of dihydroxyacetone.
First-Time Seizure Revealing Late-Onset Fahr’s Disease from Ethiopia: A Case Report a...
Adugna Lamessa
Tamirat Woyimo

Adugna Lamessa

and 3 more

July 16, 2024
First-Time Seizure Revealing Late-Onset Fahr’s Disease: A Case Report and Brief Literature ReviewAdugna Lamessa1*, Kenna Tesfaye1, Tamirat Godebo Woyimo1, Ermias Habte Gebremichael11Department of Internal Medicine, Jimma University, Ethiopia.Corresponding author*: Adugna Lamessa, +251-917-656-780, Email; adgnalem@gmail.com
Incidence and Trends of Anaphylaxis Among Inpatients from 2003 to 2023 in Wuhan, Chin...
Le Li
Nan Huang

Le Li

and 6 more

July 16, 2024
Background: The incidence of a disease can help health professionals to identify risk factors and health-care policymakers to develop corresponding policies. The realization of both purposes depends on comprehensive studies, especially studies done on a large scale. However, comprehensive studies on the incidence of anaphylaxis among inpatients in China are still notably scarce. Hence we aim to explore the incidence and clinical characteristics of anaphylaxis among inpatients over a 21-year span in Wuhan, China. Methods: We retrieved data on anaphylaxis cases from the Data Platform Application Portal (DPAP) across three medical centers of Tongji Hospital, Wuhan, China from January 1, 2003, to December 31, 2023. Results: The data encompassed a total of 362 anaphylaxis patients from 2,139,272 inpatients. Among them 204 (56.4%) were male, and the median age was 45 years old. Over the past two decades, the incidence rate of anaphylaxis at Tongji Hospital was 16.92 per 100,000 individuals. After adjusting for gender and age, the annual standardized incidence rate was 234.53 per 100,000 individuals. The incidence rate of anaphylaxis among the inpatients revealed a relatively stable but slowly rising trend over the 21-year observation period. As for the triggers of anaphylaxis, drugs were responsible for 73.6% of triggers, with antibiotics accounting for the majority of these cases (38.4%). Drug triggers also showed age-specific features: chemotherapy (17.9%) had the highest proportions among children aged 0-3 years; blood products were more prevalent in school-age children. 13.5% of the cases had an unknown cause. In anaphylaxis cases, despite that only 36.0% received epinephrine treatment, the application of epinephrine still showed an ascending trend. Moreover, the mortality rate for anaphylaxis was relatively low (1.6%), displaying a consistent downward trend. Conclusion: Our study provides insights into the incidence of anaphylaxis among inpatients in Wuhan over a 21-year period. Drugs are the most common triggers for anaphylaxis, and the use of epinephrine in anaphylaxis management is far from optimal.
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