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Membranes for gas separation: Influence of thermodynamic factors in membrane synthesi...
Shweta Negi
Suresh Akkihebbal

Shweta Negi

and 1 more

January 14, 2023
In this study, Cloud point experiments and Flory Huggins’s theory for polymer solutions are used to construct ternary phase diagrams for systems of Water/Solvent(s)/Polysulfone. The different solvents used are NMP, THF, and their mixtures, with Ethanol being optionally used as a nonsolvent additive. The ability of the F-H theory to predict the binodal phase boundaries with reasonable accuracy for both pure solvent and solvent mixtures is established. The binodal curve was distinct for each solvent and influences the precipitation path followed in phase inversion. The effect of this on the membrane structure was studied using scanning electron microscopy, and in turn, the influence of structure on membrane performance was studied in a permeation cell at a feed pressure of 3 bar. Membranes cast with a mixture of NMP-THF with EtOH as a nonsolvent showed the best performance with CO2 permeance of 7.07 GPU and CO2/CH4 selectivity of 20.77.
Hyperspectral imaging and machine learning for monitoring grapevine photosynthesis
Prakriti Sharma

Prakriti Sharma

and 1 more

January 14, 2023
ORCiD: https://orcid.org/0000-0003-4699-3733 Rootstocks are gaining importance in viticulture as a strategy to combat abiotic challenges, as well as enhancing scion physiology and attributes. Therefore, understanding how the rootstock affects photosynthesis is insightful for genetic improvement of either genotype in the grafted grapevines. Photosynthetic parameters such as maximum rate of carboxylation of RuBP (Vcmax) and the maximum rate of electron transport driving RuBP regeneration (Jmax) has been identified as ideal targets for breeding and genetic studies. However, techniques used to measure these photosynthetic parameters are time consuming and subjective to leaf level which is complex to implement at field scale. Hyperspectral remote sensing uses the optical properties of the entire vine to predict photosynthetic capacity at canopy level. In this study, estimates of Vcmax and Jmax were assessed using different machine learning models: PLS (Partial least Squares), LR (Least Angle Regression), LASSO (Least Absolute Shrinkage and Selection Operator), PCR (Principle Component Regression) based on leaf reflectance metrics obtained with hyperspectral wavelength ranging from 400 to 1000nm. Prediction models were developed for six different rootstock genotypes with common scion Marquette considering three different sampling dates carried out in Brookings, South Dakota in 2021. Preliminary results indicate that each rootstock has distinctly different Vcmax and Jmax profiles across the season. From the model assessment, PLS was found to have robust prediction of Vcmax with R2 of 0.53 and for Jmax with R2 of 0.63. Multiple year trials will be used to validate precise and rapid quantification of photosynthesis using hyperspectral remote sensing.
Hydrogen-bonded Organic Frameworks (HOFs) Prompted High-Performance Room-Temperature...
Qing-Qing Xia
Jia-Lin Yu

Qing-Qing Xia

and 6 more

January 14, 2023
Remarkable efforts have been made for room-temperature phosphorescence (RTP) materials, however, achieving desirable RTP materials in a simple and efficient way has always been the focus of researchers. Here, we reported a high-performance RTP platform based on hydrogen-bonded organic frameworks (HOFs), by simply and efficiently in-situ encapsulating phosphor into HOFs materials, the obtained host guest materials based on HOFs not only exhibited a phosphorescent lifetime of up to 4.91 ms, but also resisted water and oxygen quenching agents to maintain phosphorescence in aqueous solution. Besides, attractive triplet-to-singlet Förster resonance energy transfer (TS-FRET) platform could be easily fabricated by embedding acceptor into the HOFs-based host guest materials. Furthermore, the proposed HOFs-based RTP materials could be facilely processed into luminescent film. Such HOFs-based RTP strategy are expected to act as a facile and versatile strategy to prepare outstanding RTP materials.
Rare occurrence of Combined hepatocellular cholangiocellular carcinoma in duck in Ind...
Diksha kandpal
Rakshita Sharma

Diksha kandpal

and 3 more

January 14, 2023
Combined hepatocellular cholangiocellular carcinomas are the rarest form of primary hepatic tumors in avian species. Many reports of cHCC-CCA have been reported in animals with minimum reports in avian family. The present article deals with the occurrence of cHCC-CCA in duck reported to Veterinary pathology department, LUVAS. Grossly the duck was emaciated with presence of blood in the abdominal cavity, pale enlarged liver yellow to green raised firm nodules of varying sizes. Histopathological examination confirmed mixed hepatic tumor as both hepatocellular and cholangiocellular carcinoma lesions were evident. Increased proliferation of the bile duct along with fatty change in hepatocytes with altered cytoplasm-nuclei ration, anisokaryosis, anisocytosis, binucleation and presence of mitotic figures. Special staining revealed presence of thick fibrous capsule separating the tumor masses. To our knowledge this is the first case of occurrence of combined hepatocellular cholangiocellular carcinoma in duck in India.
Source-Sink Regulated Senescence in Commercial Maize Germplasm
Mark Gee

Mark Gee

January 14, 2023
Source-Sink Regulated Senescence in Commercial Maize Germplasm
Root Exudate Profiling in Sorghum
Marie De Gracia Coquerel

Marie De Gracia Coquerel

and 3 more

January 14, 2023
Root exudation refers to the processes by which plants release compounds called root exudates into the soil. These exudates are primarily carbon-containing compounds that interact with microbial communities in the rhizosphere. Microbial consumption of exudates reduces the concentration of the exudated compounds in the soil, causing the plant to exude more of those compounds. Currently, there is limited understanding of the interaction between plant-root exudation mechanisms and the surrounding microbial communities. Among the Sorghum Association Panel (SAP), an established and genetically characterized sorghum diversity panel, we observed a spectrum of root colors (tan, yellow, red, purple-brown, black) identical to the range of observed sorghum seed colors. Previous studies examining differentially expressed metabolites between colorful seeds showed that flavonoids and anthocyanins were higher in dark seeds than white seeds. Root color is genotype-dependent and consistent over time. We hypothesized that the observed color diversity of sorghum roots was due to differential metabolite profiles in the root exudates across genotypes. We designed an experiment to collect exudates from 15 genotypes (n=60). After three weeks of growth, sorghum roots were washed and submerged in ultrapure water for 24 hours. The hydroponic solution was filtered and incubated with methanol. The whole root system was also ground after exudation. The root exudate solutions and the ground-up roots underwent either HILIC and RPLC analysis to separate and detect polar and hydrophobic metabolites. Through metabolite profiling of root exudates, we aim to identify sorghum genotypes that more efficiently allocate carbon below ground via their root systems.
Dependence of fast changes in global and local precipitation on the geographical loca...
Andrew Williams

Andrew I.L. Williams

and 3 more

January 13, 2023
A document by Andrew Williams. Click on the document to view its contents.
Leveraging morphometric, biochemical, and spectral data to predict yields of high-can...
Maylin J Murdock

Maylin J Murdock

and 4 more

January 14, 2023
Hemp (Cannabis sativa L. <0.3% THC) is a versatile crop cultivated for grain, fiber, and cannabinoids used for health and wellness purposes. Following the passage of the 2018 Farm Bill, which removed hemp from the controlled substances list, there is potential for expanded hemp acreage and a concomitant need to breed cultivars with suitable agronomic performance in US growing regions. Understanding the relationships between morphological, biochemical, and spectral traits with respect to yield will allow for high-throughput phenotyping and advanced breeding efforts. For five years, the Cornell Hemp research team has evaluated high-cannabinoid hemp cultivars in replicated field trials, with populations originating from both commercial sources and the Cornell Hemp Breeding Program. These field trials evaluated plants for phenotypic traits, including plant height, morphology, flowering time, cannabinoid concentration, and total biomass yield. We have also determined key morphometric measurements that are correlated with end-of-season biomass yield. Also, both floral and foliar cannabinoid samples were correlated with end-of-season whole plant biomass cannabinoid concentration. To improve phenotyping efficiency, an unmanned aerial vehicle (UAV)-based multispectral system was deployed to characterize morphological and biochemical traits over time. These datasets are being used to develop high-throughput phenotyping methods to predict biomass yield, and in the future cannabinoid concentration and flowering time.
Fabrication of oxygen carrying microparticles functionalized with liver ECM-proteins...
Nic Leipzig
Mona Mansouri

Nic Leipzig

and 3 more

January 13, 2023
Oxygen and extracellular matrix (ECM)-derived biopolymers play vital roles in regulating many cellular functions in both the healthy and diseased liver. This study reveals the importance of synergistically tuning the internal microenvironment to enhance oxygen availability alongside phenotypic ECM ligand presentation to promote native metabolic functions of human liver three-dimensional (3D) cell aggregates. First, fluorinated (PFC) chitosan microparticles (MPs) were generated with a microfluidic chip, then their oxygen transport properties were studied using a custom ruthenium-based oxygen sensing approach. Next, to allow for integrin engagements the surfaces of these MPs were functionalized using liver ECM proteins including fibronectin, laminin-111, laminin-511, and laminin-521. These MPs were used to assemble heterogeneous composite spheroids composed of human hepatocytes and human hepatic stellate cells. After in vitro culture, liver-specific functions and cell adhesion patterns were compared between groups and cells showed enhanced liver phenotypic responses in response to laminin-511 and 521 as evidenced via enhanced E-cadherin and vinculin expression as well as albumin and urea secretion. Furthermore, hepatocytes and stellate cells arranged in more phenotypic arrangements when cocultured with laminin-511 and 521 modified MPs providing clear evidence that specific ECM proteins have distinctive roles in the phenotypic regulation of liver cells in engineering 3D spheroids. This study advances efforts to create more physiologically relevant organ models allowing for well-defined conditions and phenotypic cell signaling which together improve the relevance of 3D spheroid and organoid models.
A case of Primary Mediastinal large B cell Lymphoma Presenting as Constrictive Perica...
Yuwei Fu
Liehuo Cai

Yuwei Fu

and 4 more

January 13, 2023
INTRODUCTION A 54-year-old female patient was transferred to our hospital because of progressive aggravation of chest tightness and suffocation for more than 1 month. ECG suggested an incomplete right bundle branch block. Cardiac ultrasound showed that the pericardial visceral layer was thickened unevenly and the echo was enhanced. The thickness of left ventricular apex was about 12mm, the left ventricular lateral wall was about 10mm, and the right ventricular lateral wall was about 11mm (Figure [1](#fig-cap-0001)). The pericardial visceral layer and the wall layer at the left ventricular lateral wall and the lateral posterior wall adhered to each other, resulting in reduced myocardial motion and the angle between left atrium and left ventricular posterior wall became smaller (Movie 1-2). Massive amount of hydropericardium can be seen in the pericardial cavity. The liquid depth of the right atrium is 20mm, the liquid depth of the right ventricular side wall is 22mm, and the band-like cellulose exudation can be seen between the right ventricular side wall and the pericardium (Movies 3). Tissue Doppler showed that the velocity e ‘of the mitral annulus on the ventricular septal side was 8.1cm/s, and the velocity e’ of the mitral annulus on the left ventricular lateral wall side was 3.5cm/s (Figure [2](#fig-cap-0002)-3). At the same time, a hypoechoic mass in the anterior mediastinum surrounding the ascending aorta and pulmonary artery can be scanned. Color Doppler flow imaging indicates that there is no blood flow signal inside the mass (Figure [4](#fig-cap-0003)-5). It is considered as a solid space occupying lesion in the mediastinum, with the exception of constrictive pericarditis caused by lymphoma pericardial infiltration, pericardial effusion (large amount), partial reduction of left ventricular wall motion and left ventricular diastolic function. PET-CT showed that there were irregular lumpy and flaky soft tissue density foci in the middle and upper mediastinum, which locally surrounded the blood vessels and trachea; The pericardium is unevenly thickened, the glucose metabolism is significantly increased (SUVmax 25.0), and the pericardium can see fluid density lesions. It is considered that this is the involvement of lymphoma as well (Figure [6](#fig-cap-0004)). Ultrasound in the neck suggested that the right supraclavicular lymph node was enlarged, and a lymph node puncture was performed to eventually diagnose primary mediastinal large B cell lymphoma (Figure 7-8). After one cycle of treatment with the first-line RCHOP regimen (metoclopramide 600mg D1, cyclophosphamide 1.16g D2, vincristine 2mg D2, pirarubicin 77mg D2, prednisone 100mg d2-6, q21d), the reexamination of cardiac ultrasound showed that the thickening of the pericardial viscera was less than before, the left ventricular wall motion of the lateral and posterior wall recovered significantly (Movie 4-5). Tissue Doppler showed that the velocity e ‘of the mitral annulus on the ventricular septal side was 7.8cm/s, the velocity e’ of the mitral annulus on the left ventricular side wall was 6.6cm/s(Figure [9](#fig-cap-0006)-10), and the pericardial effusion disappeared(Figure [11](#fig-cap-0007)).
Impact of Physician Performed Point of Care Ultrasound (POCUS) During first Outpatien...
Tasneem Naqvi
Raed Aladham

Tasneem Naqvi

and 2 more

January 13, 2023
A document by Tasneem Naqvi. Click on the document to view its contents.
Drone-imagery phenotyping using deep learning approaches to estimate plant maturity a...
Leonardo Volpato

Leonardo Volpato

and 1 more

January 14, 2023
A dry beans (Phaseolus vulgaris L.) cultivar must fit the environment in which it will be grown. Therefore, days to maturity (DM) is the most important physiological component affecting yield and grain quality outcomes. Additionally, dry bean stand count (SC) at early growth stages estimation provides useful information for agronomic decision-making and can measure root rot loss due to damping-off. The visual inspection to determine the accurate maturity date and the final number of emerged plants is labor-intensive, time-demanding, and tedious. Therefore, there is an increasing demand for alternative approaches to estimating DM and SC in a high-throughput phenotyping mode (HTP). In this study, we developed a Deep Learning (DL) HTP pipeline to capture the sequential behavior of time series data for estimating DM and to identify target plants in the early growth stage for SC estimation using field dry bean data obtained from aerial RGB images at the plot-level. A state-of-the-art hybrid model combining Convolutional Neural Networks (CNN) and Long Short-Term Memory (LSTM) was used to extract DM features and capture the sequential behavior of time series data. Faster R-CNN object detection method was deployed to SC. The DL model to estimate DM was tested on five different environments across years, and SC was done comparing different ground sample resolutions in two trials. Results suggest the effectiveness of the CNN-LSTM and Faster R-CNN models employed compared to traditional methods. Furthermore, this study highlighted the technical parameters that can influence the DL model results in the breeding program decision-making.
Deep learning for maize mutants: Phenotyping individual plants using UAS images
Piyush Pandey

Piyush Pandey

and 2 more

January 14, 2023
Using Unoccupied Aerial Systems (UASs) to collect image data for field phenotyping enables the coverage of large spatial scales, but the extraction of phenotypes at the level of an individual plant remains a challenge. Phenotypes are generally extracted at the plot level after manual delineation of the plots in an orthomosaic image. However, this approach is impractical when individual plant phenotypes are of interest, such as in mutant screenings, heterozygous population trials, and other cases where individual plants in a plot or a landscape may be very diverse. For mutant studies in particular, UASs have had limited utility since one typically wants to identify individual plants with outlier phenotypes. Current mutant population screenings require scientists to walk through the field on a regular basis to manually identify and record plants of interest. If UAS software could be designed to identify these plants, much larger studies could be conducted with lower labor costs. Here, we use deep Convolutional Neural Network (CNN) models to detect individual maize plants in raw UAS images followed by the extraction of individual phenotypes. The predictions from the CNN models are used to identify plants in the orthomosaic image to derive information on plot location. For the extraction of phenotypes, plant pixels are segmented from the background and traits including color-based indices and canopy coverage are calculated. Individual plant height is derived from the corresponding Digital Surface Model (DSM). This project will contribute to a more efficient approach for the phenotyping of individual plants using UAS images.
Behçet syndrome: The disturbed balance between anti- (CLEC12A, CLC) and  pro-inflamma...
Ali Kemal Oguz

Ali Kemal Oguz

and 4 more

January 18, 2023
AbstractBehçet syndrome (BS) is a chronic, multisystemic inflammatory condition with unanswered questions regarding its pathogenesis and rational therapeutics. A microarray-based comparative transcriptomic analysis was performed to elucidate the molecular mechanisms of BS and identify any potential therapeutic targets. Twenty-nine BS patients (B) and 15 age and sex-matched control subjects (C) were recruited. Patients were grouped as mucocutaneous (M), ocular (O), and vascular (V) according to their clinical phenotypes. GeneChip Human Genome U133 Plus 2.0 arrays were used for expression profiling on peripheral blood samples of the patients and the control subjects. Following documentation of the differentially expressed gene (DEG) sets, the data were further evaluated with bioinformatics analysis, visualization, and enrichment tools. Validation of the microarray data was performed using qRT-PCR. When P <0.05 and fold change >2.0 were chosen, the following numbers of DEGs were obtained; B vs. C: 28, M vs. C: 20, O vs. C: 8, V vs. C: 555, M vs. O: 6, M vs. V: 324, O vs. V: 142. Venn diagram analysis indicated only two genes, CLEC12A and IFI27, in the intersection of M vs. C and O vs. C and V vs. C. Another noteworthy gene appeared as CLC in the DEG sets. Cluster analyses successfully clustered distinct clinical phenotypes of BS. While innate immunity-related processes were enriched in the M group, adaptive immunity-specific processes were significantly enriched in the O and V groups. Distinct clinical phenotypes of BS patients displayed distinct expression profiles. In Turkish BS patients, expression differences regarding the genes CLEC12A, IFI27, and CLC seemed to be operative in the disease pathogenesis. Based on these findings, future research should consider the immunogenetic heterogeneity of BS clinical phenotypes. Two anti-inflammatory genes, namely CLEC12A and CLC, may be valuable as therapeutic targets and may also help design an experimental model in BS.IntroductionBehçet syndrome (BS) is a chronic, multisystemic inflammatory condition characterized by a relapsing and remitting course.1Initially defined by Dr. Hulusi Behçet as a “triple symptom complex” including oral and genital ulcers and uveitis, BS may present with diverse mucocutaneous, ocular, musculoskeletal, gastrointestinal, pulmonary, cardiovascular, and central nervous system manifestations, which are primarily vasculitic in origin.2,3Even though more than eight decades have passed since its definition, there are essential questions regarding BS that still need to be answered. The etiopathogenesis of the condition and its rational therapeutics are among these questions waiting for an answer. Three important properties of BS, namely (1) the divergent and sometimes paradoxical immunological findings observed in the studies, (2) the occurrence of diverse clinical features among different ethnic groups, and (3) the distinct clinical phenotype clusters within the syndrome, complicate the clarification of a sound, shared, and comprehensive etiopathogenesis for BS.4,5 Elucidating the disease mechanisms of BS at the molecular level may enable the scientific community to find the answers to the questions mentioned above, including the pathogenesis of BS, and may help develop novel, effective, and safer treatment approaches for the syndrome.Previously, by borrowing the microarray data (Gene Expression Omnibus [GEO] data repository, GEO accession GSE17114) of the study by Xavier et al.6, our group has demonstrated the presence of significant differences in gene expression and disease pathways between mucocutaneous, ocular, and vascular BS groups in a Portuguese BS patient population.5 Additionally, in the same study, four functional gene groups, namely (1) negative regulators of inflammation (CD69 , CLEC12A ,TNFAIP3 ), (2) neutrophil granule proteins (LTF ,OLFM4 , AZU1 , MMP8 , DEFA4 , CAMP ), (3) antigen processing and presentation proteins (CTSS ,ERAP1 ), and (4) regulators of immune response (LGALS2 ,BCL10 , ITCH , CEACAM8 , CD36 , IL8 ,CCL4 , EREG , NFKBIZ , CCR2 , CD180 ,KLRC4 , NFAT5 ) were shown to be potentially instrumental in BS immunopathogenesis.5In our present study, we performed a microarray-based comparative genome-wide expression analysis in Turkish BS patients and a sex and age-matched healthy control group. We aimed (1) to elucidate the molecular disease mechanisms in Turkish BS patients, (2) to document any discrepancies between BS clinical phenotypes/patient subgroups regarding these disease mechanisms, and (3) to identify any potential therapeutic targets for BS.
Temporal Assessment of Drought Stress Progression through Large-Scale Machine- Learni...
Jinyoung Barnaby

Jinyoung Barnaby

and 2 more

January 14, 2023
ORCiD: [0000-0001-6507-9985 of Jinyoung Y. Barnaby], [0000-0001-9082-6583 of Scott E. Warnke] Precise assessment of large mapping populations, comprising a few thousand plants including replications (a prerequisite step for breeding) is time-consuming and labor-intensive. Furthermore, phenotyping results tend to be variable and subjective depending on who is doing the scoring. One way to overcome these limitations is by collecting more data in the form of digital images, and precisely evaluating phenotypic variation in stress severity as well as temporal progression of stress symptoms within the population through machine learning methods. 230,400 images representing temporal progression of drought stress symptoms of interspecific turfgrass hybrid mapping population were processed using Python OpenCV and NumPy packages for noise removal, edge-preserving smoothing, color space conversion, contrast enhancement, and identification mapping. Then machine learning-based algorithms and models were developed not only to quantify stress severity but also to monitor temporal progression rate of stress symptoms. Hierarchical clustering was then performed to assess genotypic variation in stress progression. Such machine learning-based high-throughput digital phenotyping platforms can significantly increase the success of quantitative trait locus mapping and candidate gene identification to develop potential molecular markers that will assist in a faster characterization of germplasm to ultimately breed for stress resilient cultivars.
Gas-Phase Formation of Grignard-type Organolanthanide(III) Ions RLnCl3-: the Influenc...
Meixian Yang
Zhixin Xiong

Meixian Yang

and 4 more

January 13, 2023
Rationale: The fundamental understanding of Grignard-type organolanthanides(III) is still in its infancy. Decarboxylation of metal carboxylate ions is a powerful method to obtain organometallic ions which are well suited for gas-phase investigation by using ESI-MS in combination with DFT calculations. Methods: (RCO2)LnCl3- (R = CH3, Ln = La-Lu except Pm; Ln = La, R = CH3CH2, CH2CH, CHC, C6H5 and C6H11) ions were produced via ESI of LnCl3 and RCO2H/RCO2Na in methanol. Collision-induced dissociation (CID) was employed to examine whether RLnCl3- can be obtained via decarboxylation of (RCO2)LnCl3-. With the aid of DFT calculations, the influences of Ln and R on the formation of RLnCl3- can be uncovered. Results: When R was fixed as methyl, CID of (CH3CO2)LnCl3- (Ln = La-Lu except Pm) all gave (CH3)LnCl3- and LnCl3·- with a variation in the relative intensity ratio of (CH3)LnCl3-/LnCl3·-. The trend is following as (CH3)EuCl3-/EuCl3·- < (CH3)YbCl3-/YbCl3·- ≈ (CH3)SmCl3-/SmCl3·- < other (CH3)LnCl3-/LnCl3·-, which generally complies with the trend of Ln(III)/Ln(II) reduction potentials. When Ln was fixed as La and R groups were varied as CH3CH2, CH2CH, CHC, C6H5 and C6H11, the fragmentation behaviors of these (RCO2)LaCl3- are diverse. Except for (C6H11CO2)LaCl3-, the rest four (RCO2)LaCl3- ions all underwent decarboxylation to give RLaCl3-. The relative intensities of RLaCl3- compared to (RCO2)LaCl3- decrease as follow: CHC > CH2CH > C6H5 > CH3 > CH3CH2 >> C6H11 (not visible). Conclusion: A series of Grignard-type organolanthanide(III) ions RLnCl3- (R = CH3, Ln = La-Lu except Pm; Ln = La, R = CH3CH2, CH2CH, CHC and C6H5) were generated from (RCO2)LnCl3- via CO2 loss while (C6H5)LaCl3- not. The experimental and theoretical results suggest that the reduction potentials of Ln(III)/Ln(II) couples as well as the bulkiness and hybridization of hydrocarbyl groups play crucial roles in promoting or limiting the formation of RLnCl3- via decarboxylation.
Consensus survey on the management of children with chemotherapy-induced febrile neut...
François Dubos
Aude Givone

François Dubos

and 5 more

January 13, 2023
Purpose: To identify national consensus criteria for the management of children with chemotherapy-induced febrile neutropenia (FN) and for evidence-based step-down treatment approaches for patients classified as having a low risk of severe infection. Methods: In August 2018, a five-section, 38-item survey was e-mailed to all pediatric hematology and oncology units in France. The five sections contained statements on possible consensus criteria for (i) the definition of FN, (ii) the initial management of children with FN, (iii) the conditions required for initiating step-down therapy in low-risk patients, (iv) the management strategy for low-risk patients, and (v) antibiotic treatment on discharge. Consensus was defined as 75% of “somewhat agree” + “strongly agree” answers. Results: Sixty-five physicians, all specialists in pediatric onco-hematology, from 18 centers completed the survey questionnaire (participation rate: 58%). A consensus was reached on 22 of the 38 statements, including the definition of FN, the criteria for step-down therapy in children at low risk of severe infection, and the initial care of patients with FN. There was no consensus on the type and duration of antibiotic therapy on discharge for patients at low risk of severe infection. Conclusion: A consensus has been reached on the criteria for initiating evidence-based step-down treatment of children with FN and a low risk of severe infection. The lack of consensus on the step-down antimicrobial regimen means that the post-discharge antibiotic treatment can be defined according to local preferences.
Impact of Diagnostic and End-Induction Curie Scores with Tandem Autologous Transplant...
Keri Streby
Meg Parisi

Keri Streby

and 13 more

January 13, 2023
BACKGROUND: Diagnostic mIBG (meta-iodobenzylguanidine) scans are an integral component of response assessment in children with high-risk neuroblastoma. The role of end of induction (EOI) Curie Scores (CS) was previously described in patients undergoing a single autologous hematopoietic cell transplant (AHCT) as consolidation therapy. OBJECTIVE: We now examine the prognostic significance of CS in patients randomized to tandem AHCT on the Children’s Oncology Group (COG) trial ANBL0532. STUDY DESIGN: A retrospective analysis of mIBG scans obtained from patients enrolled in COG ANBL0532 was performed. Evaluable patients had mIBG-avid, International Neuroblastoma Staging System (INSS) stage 4 disease, did not progress during induction therapy, consented to consolidation randomization, and received a tandem AHCT (n=80). Optimal CS cut points maximized the outcome difference (≤ vs >CS cut-off) according to the Youden index. RESULTS: For recipients of tandem AHCT, the optimal cut point at diagnosis was CS=12, with superior EFS from study enrollment for patients with CS<12 (3-year EFS 74.2±7.9%) vs CS>12 (59.2±7.1%) (p=0.002). At EOI, the optimal cut point was CS=0, with superior end-induction EFS for patients with CS=0 (72.9±6.4%) vs CS>0 (46.5±9.1%) (p=0.002). CONCLUSION: In the setting of tandem transplantation for children with high-risk neuroblastoma, Curie scores at diagnosis and end-induction may identify a more favorable patient group. Patients treated with tandem AHCT who exhibited a CS<12 at diagnosis or CS=0 at EOI had superior EFS compared to those with CS above these cut points.
Association between Antihypertensive Medication Class and Diastolic Orthostatic Hyper...
Maria D. Jackson
Latoya Smith

Maria D. Jackson

and 3 more

January 13, 2023
In the Caribbean there is limited data on orthostatic hypertension (OHT) in elderly hypertensive patients with atherosclerotic disease who are at risk for cardiovascular events. We examined the association of antihypertensive classes of drugs with diastolic OHT in patients 60 year and older with hypertension and hyperlipidemia attending public primary care facilities. Methods: Cross-sectional study of hypertensive hyperlipidemic older patients (n=400) to determine orthostatic changes in blood pressure based on seated to standing measurements. OHT was defined as an increase in systolic blood pressure of ≥ 20mmHg and/or increase in diastolic blood pressure of ≥ 10mmHg upon orthostasis at 3 minutes. Patients were categorized based on their orthostatic blood pressure response: orthostatic normotensive (n=200) and blood pressure dysregulated (n=200) of which 168 were diastolic OHT. Multivariable logistic regression models were used to examine associations of antihypertensive classes and diastolic OHT. Results: Renin-angiotensin-aldosterone-system (RAAS) blockers were the most commonly prescribed (79.3%), followed by diuretics (DIUs) (61.6%), dihydropyridine calcium channel blockers (dCCBs) (53.8%) and beta-blockers (BBs) (19.3%). Most normotensive (76.0%) and diastolic OHT (75.0%) patients were prescribed two or more antihypertensive medications. Pharmaceutical prescription of triple combination RAAS blockers+dCCBs+DIUs (OR, 0.55; 95% CI, 0.31–0.99) or RAAS blockers+dCCBs+BBs (OR, 0.23; 95% CI, 0.06–0.92) showed a protective effect of diastolic OHT in analyses adjusted for age, gender, sitting diastolic blood pressure and comorbidities. Conclusion: Our study suggests prescription of triple combination antihypertensive drugs of RAAS blockers+dCCBs+DIUs or RAAS blockers+dCCBs+BBs may reduce the likelihood of diastolic OHT.
The successes and pitfalls: Deep learning effectiveness in a Chernobyl field camera t...
Rachel Maile
Matthew Duggan

Rachel Maile

and 2 more

September 01, 2022
Camera traps have become in-situ sensors for collecting information on animal abundance and occupancy estimates. When deployed over a large landscape, camera traps have become ideal for measuring the health of ecosystems, particularly in unstable habitats where it can be dangerous or even impossible to observe using conventional methods. However, manual processing of imagery is extremely time and labor intensive. Because of the associated expense, many studies have started to employ machine learning tools, such as convolutional neural networks (CNNs). One drawback is that for the majority of networks a large number of images (millions) are needed to devise an effective identification or classification model. This study examines specific factors pertinent to camera trap placement in the field that may influence the accuracy metrics of a deep learning model that has been trained with a small set of images. False negatives and false positives may occur due to a variety of environmental factors that make it difficult for even a human observer to classify, including local weather patterns and daylight. We transfer-trained a CNN to detect 16 different object classes (14 animal species, humans, and fires) across 9,576 images taken from camera traps placed in the Chernobyl Exclusion Zone. After analyzing wind speed, cloud cover, temperature, and image contrast, there was a significant positive association between CNN success and temperature. Furthermore, we found that the model was more successful when images were taken during the day as well as when precipitation was not present. We show that external variables at camera trap locations have a noticeable effect on CNN accuracy. Qualitative site-specific factors can confuse quantitative classification algorithms such as CNNs. This study suggests that further exploration into the causes of error in classification modeling is necessary given the unique challenges posed by the analysis of camera trap imagery.
Sesame Allergy in Children: New Insights in Diagnosis and Management
Sarah Saf
Magnus Borres

MD, MSc Sarah Saf

and 2 more

January 13, 2023
Sesame is a potentially potent allergen that can trigger skin, gastrointestinal, and respiratory tract symptoms, and anaphylaxis. Only 20% to 30% of sesame-allergic children develop tolerance. The prevalence of sesame allergy depends on local diets and ranges from 0.1% to 0.9%. A high risk of accidental exposure to sesame has resulted in mandatory food labeling in many countries. More than half of patients with sesame allergy are also allergic to peanut/tree nuts. Serum specific IgE testing with a quantitative Ses i 1 component can be performed safely and has higher clinical specificity and better positive predictive value for oral food challenge (OFC) than whole sesame extract or skin prick testing (SPT). Compared with SPT or OFC, in vitro Ses i 1 testing requires no special techniques and carries no risk of reactions. Diagnosis of suspected sesame allergy begins with a thorough history and physical examination. A positive sesame extract test (≥0.1 kU A/L) should prompt further testing. In patients with a high probability of reacting, results of component testing may facilitate a decision about performing an OFC. In a Japanese study of OFC and Ses i 1, there was a 5% probability of a positive OFC with Ses i 1 sIgE levels <0.13 kU A/L, and a 50% probability of a positive OFC with levels >32.0 kU A/L. Most patients could safely consume sesame if sIgE levels were <0.13 kU A/L. Ses i 1 testing can be used to guide appropriate management (avoidance, emergency medication, and oral immunotherapy).
Trajectory tracking control based on prescribed performance and fractional-order stat...
Shuyi Shao
Liwen Wang

Shuyi Shao

and 3 more

January 13, 2023
The tracking control problem of trajectory planning is studied in this paper based on prescribed performance method (PPM) for the small-scale unmanned autonomous helicopter (UAH) with wind-gust disturbances (WGDs) and unmeasurable states. For the purpose, the nonlinear model with flapping dynamics is established, and the transformation performance function is used to ensure that the errors of trajectory tracking satisfy the corresponding performance. The fractional-order observers are investigated to estimate the longitudinal and lateral flapping angles that are treated as unmeasurable states, and estimate the WGDs, respectively. Based on PPM and the designed observers, the fractional-order theory-based backstepping trajectory tracking control scheme is developed for the UAH system, and the three-dimensional trajectory is planned by the improved wolf pack algorithm. Then the stability of the entire system is proven through strict theoretical analysis. Finally, the simulation analysis on the UAH are presented to demonstrate the efficiency of the designed method.
Histological characterization of the human scapholunate ligament
Miguel Alaminos
Jesús Chato-Astrain

Miguel Alaminos

and 6 more

January 13, 2023
The scapholunate interosseous ligament (SLIL) plays a fundamental role in stabilizing the wrist bones, and its disruption is a frequent cause of wrist arthrosis and disfunction. Traditionally, this structure is considered to be a variety of fibrocartilaginous tissue and consists of three regions: dorsal, membranous and palmar. Despite its functional relevance, the exact composition of the human SLIL is not well understood. In the present work, we have analyzed the human SLIL and control tissues from the human hand using an array of histological, histochemical and immunohistochemical methods to characterize each region of this structure. Results reveal that the SLIL is heterogeneous, and each region can be subdivided in two zones that are histologically different to the other zones. Analysis of collagen and elastic fibers, collagens types I, III and IV, proteoglycans, glycoproteins and versican confirmed that the different regions can be subdivided in two zones that have their own structure and composition. The first part of the dorsal region (zone D1) resembles the control tendons and ligaments, whereas the rest of the SLIL are more similar to the control articular cartilage, especially the first part of the membranous region (zone M1). Cells showing a chondrocyte-like phenotype as determined by S100 were more abundant in M1, whereas the zone containing more CD73-positive stem cells was D2. These results confirm the heterogeneity of the human SLIL and could contribute to explain why certain zones of this structure are more prone to structural damage and why other zones have specific regeneration potential.
Delirium in hospitalized elderly patients with non-severe SARS-CoV-2 infection: an ob...
Guanghui An
Zhihua Mi

Guanghui An

and 7 more

January 13, 2023
Objective Delirium has been reported in all the course of COVID-19, especially in aged patient with severe SARS-CoV-2 infection, but there are few studies on these millions of patients with none-severe omicron infection. To study the incidence of delirium and its factors in hospitalized elderly patients with non-severe Omicron infection,we reported this single-center observational study. Methods Patients tested positive for SARS-CoV-2 infection at the hospital were included. We used the 3-min diagnostic Confusion Assessment Method for delirium diagnosis. We collected the demographic data, medical history, number of vaccine doses against COVID-19, the first laboratory tests and chest computed tomogram, days to the outcome, and medications to treat COVID-19. Results The data of 311 patients were analyzed, of whom 73 (23.47%) patients were diagnosed with delirium. The five parameters identified as independent factors for delirium were age, body mass index, total protein, albumin-to-globulin ratio, and platelet-large cell ratio. These parameters were used to create a risk prediction model, which showed good predictive accuracy. A decision curve analysis was made, using this model, patients could benefit from the treatment with the incidence from 0.15 to 0.5. Conclusion we found that delirium is frequently seen in elderly patients with non-severe Omicron infection. Age, body mass index, total protein, albumin-to-globulin ratio, and platelet-large cell ratio were identified as independent factors for delirium. These factors are good for delirium, and early detection and preventive action may be taken based on them.
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