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1.
J Clin Exp Hepatol ; 14(6): 101446, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-38946865

RESUMO

Background: There is no accepted way to define difficult donor hepatectomy (DiffDH) during open right live donor hepatectomy (ORLDH). There are also no studies exploring association between DiffDH and early donor outcomes or reliable pre-operative predictors of DiffDH. Methods: Consecutive ORLDH performed over 18 months at a single center were included. Intraoperative parameters were used to develop an objective definition of DiffDH. The impact of DiffDH on early postoperative outcomes and achievement of textbook outcome (TO) was evaluated. Donor morphometry data on axial and coronal sections of donor computed tomography (CT) at the level of portal bifurcation were collected. Donor and graft factors predictive of DiffDH were evaluated using univariate and multivariate logistic regression. Results: One-hundred-eleven donors (male: 40.5%, age: 34 ± 9.5 years) underwent ORLDH during the study period. The difficulty score was constructed using five intraoperative parameters, i.e., operating time, transection time, estimated blood loss, need for intraoperative vasopressors, and need for Pringle maneuver. Donors were classified as DiffDH (score ≥ 2) or standard donor hepatectomy (StDH) (score <2). Twenty-nine donors (26%) were classified as DiffDH. DiffDH donors suffered greater all-cause morbidity (P = 0.004) but not major morbidity (Clavien-Dindo score >2; P = 0.651), more perioperative transfusion (P = 0.013), increased postoperative systemic inflammatory response syndrome (P = 0.034), delay in achieving full oral diet (P = 0.047), and a 70% reduced chance of achieving TO as compared to StDH (P = 0.007). On logistic regression analysis, increasing right lobe anteroposterior depth (RLdepth) was identified as an independent predictor of DiffDH (Odds ratio: 2.0 (95% confidence interval = 1.2, 3.3), P < 0.006). Receiver operating characteristic curve analysis identified an RLdepth of >14 cm as the best predictor of DiffDH (sensitivity:79%, specificity: 66%, area under curve = 0.803, P < 0.001). Conclusion: We report a novel definition of DiffDH and show that it is associated with worse postoperative outcomes, including a lesser chance of achieving TO. We also report that DiffDH can be predicted from readily available donor CT parameters.

2.
Mol Biol Rep ; 51(1): 791, 2024 Jul 11.
Artigo em Inglês | MEDLINE | ID: mdl-38990430

RESUMO

BACKGROUND: Heat stress is a detrimental abiotic stress that limits the development of many plant species and is linked to a variety of cellular and physiological problems. Heat stress affects membrane fluidity, which leads to negative effects on cell permeability and ion transport. Research reveals that heat stress causes severe damage to cells and leads to rapid accumulation of reactive oxygen species (ROS), which could cause programmed cell death. METHODS AND RESULTS: This current study aimed to validate the role of Triticum aestivum Salt Stress Root Protein (TaSSRP) in plants' tolerance to heat stress by modulating its expression in tobacco plants. The Relative Water Content (RWC), total chlorophyll content, and Membrane Stability Index (MSI) of the seven distinct transgenic lines (T0 - 2, T0 - 3, T0 - 6, T0 - 8, T0 - 9, T0 - 11, and T0 - 13), increased in response to heat stress. Despite the fact that the same tendency was detected in wild-type (WT) plants, changes in physio-biochemical parameters were greater in transgenic lines than in WT plants. The expression analysis revealed that the transgene TaSSRP expressed from 1.00 to 1.809 folds in different lines in the transgenic tobacco plants. The gene TaSSRP offered resistance to heat stress in Nicotiana tabacum, according to the results of the study. CONCLUSION: These findings could help to improve our knowledge and understanding of the mechanism underlying thermotolerance in wheat, and the novel identified gene TaSSRP could be used in generating wheat varieties with enhanced tolerance to heat stress.


Assuntos
Regulação da Expressão Gênica de Plantas , Resposta ao Choque Térmico , Nicotiana , Proteínas de Plantas , Plantas Geneticamente Modificadas , Triticum , Nicotiana/genética , Nicotiana/metabolismo , Triticum/genética , Triticum/metabolismo , Plantas Geneticamente Modificadas/genética , Proteínas de Plantas/genética , Proteínas de Plantas/metabolismo , Resposta ao Choque Térmico/genética , Espécies Reativas de Oxigênio/metabolismo , Raízes de Plantas/metabolismo , Raízes de Plantas/genética , Termotolerância/genética , Clorofila/metabolismo , Tolerância ao Sal/genética
3.
Mol Genet Genomics ; 299(1): 67, 2024 Jul 09.
Artigo em Inglês | MEDLINE | ID: mdl-38980527

RESUMO

India's rich diversity encompasses individuals from varied geographical, cultural, and ethnic backgrounds. In the field of population genetics, comprehending the genetic diversity across distinct populations plays a crucial role. This study presents significant findings from genetic data obtained from the Sikkimese population of India. Autosomal markers were crucial for evaluating forensic parameters, with a combined paternity index of 1 × 109. Notably, Penta E emerged as a distinguishing marker for individual identification in the Sikkim population. Fst genetic distance values revealed insights into genetic isolation among different groups, enhancing our understanding of population dynamics in the central Himalayan region. The NJ-based phylogenetic tree highlighted close genetic relationships, of the Sikkim population with the Nepalese population surrounding neighbouring Himalayan populations providing glimpses into common ancestry. In summary, this study contributes valuable data to population genetics and underscores the importance of genetic variation in comprehending population dynamics and forensic applications.


Assuntos
Variação Genética , Genética Populacional , Filogenia , Dinâmica Populacional , Humanos , Índia , Siquim , Masculino , Repetições de Microssatélites/genética , Etnicidade/genética , Feminino
4.
Arch Virol ; 169(7): 145, 2024 Jun 12.
Artigo em Inglês | MEDLINE | ID: mdl-38864875

RESUMO

Since 2020, African swine fever (ASF) has affected all pig breeds in Northeast India except Doom pigs, a unique indigenous breed from Assam and the closest relatives of Indian wild pigs. ASF outbreaks result in significant economic losses for pig farmers in the region. Based on sequencing and phylogenetic analysis of the B646L (p72) gene, it has been determined that ASFV genotype II is responsible for outbreaks in this region. Recent studies have shown that MYD88, LDHB, and IFIT1, which are important genes of the immune system, are involved in the pathogenesis of ASFV. The differential expression patterns of these genes in surviving ASFV-infected and healthy Doom breed pigs were compared to healthy controls at different stages of infection. The ability of Doom pigs to withstand common pig diseases, along with their genetic resemblance to wild pigs, make them ideal candidates for studying tolerance to ASFV infection. In the present study, we investigated the natural resistance to ASF in Doom pigs from an endemic area in Northeast India. The results of this study provide important molecular insights into the regulation of ASFV tolerance genes.


Assuntos
Vírus da Febre Suína Africana , Febre Suína Africana , Surtos de Doenças , Filogenia , Animais , Febre Suína Africana/virologia , Febre Suína Africana/epidemiologia , Febre Suína Africana/imunologia , Vírus da Febre Suína Africana/genética , Vírus da Febre Suína Africana/imunologia , Índia/epidemiologia , Suínos , Surtos de Doenças/veterinária , Genótipo , Fator 88 de Diferenciação Mieloide/genética , Resistência à Doença/genética
5.
Iran J Microbiol ; 16(2): 258-262, 2024 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-38854983

RESUMO

Background and Objectives: Malaria was the first ever reported case of transfusion transmitted infection (TTI). Transfusion transmissible malaria (TTM) can result in febrile transfusion reaction in the recipient. TTM can be fatal if the blood transfusion recipient is from vulnerable population i.e. pregnant women or young children. Therefore, the present study was done to estimate the seroprevalence of malaria parasitemia among blood donors in Garhwal region. Materials and Methods: Study subjects were healthy blood donors who had passed the screening criteria for blood donation. Donors with a history of malaria were temporarily deferred for 3 months following full recovery. Screening of the donated blood units for malaria parasite was done using immunochromatography based rapid diagnostic test. Thin smear examination was performed for malaria parasite species identification. Results: A total of 1984 blood donations were screened for TTI. The seroprevalence of HBV, HCV HIV and syphilis was 0.3% (n=6), 0.25% (n=5), 0% (n=0) and 0% (n=0) respectively. The seroprevalence of malaria parasite was 0.05% (n=1). Plasmodium vivax was identified upon thin smear examination. The donor reactive for malaria parasite was a replacement donor and gave no recent history of fever or any past history of malaria. Conclusion: Meticulous donor screening combined with rapid diagnostic tests for malaria parasite is the most practical strategy to prevent TTM in Garhwal region of India.

6.
J Fungi (Basel) ; 10(6)2024 Jun 07.
Artigo em Inglês | MEDLINE | ID: mdl-38921399

RESUMO

Over the past decade, there have been accumulating reports from researchers, farmers, and field extension personnel on the increasing incidence and spread of onion basal rot in India. Onion basal rot disease is mainly caused by Fusarium spp. This study aimed to validate the information on the active prevalence of F. falciforme and F. acutatum causing Fusarium basal rot (FBR) in Maharashtra. A survey was conducted, and the infected plants/bulbs were collected from fields of 38 locations comprising five districts of Maharashtra, namely, Nashik, Aurangabad, Solapur, Ahmednagar, and Pune, in 2023. This disease was prevalent in high-moisture and high-oil-temperature conditions and the symptoms were observed in most of the fields, with the FBR incidence ranging from 17 to 41%. The available data of basal rot incidence from 1998 to 2022 were analyzed, based on which the prevalence of FBR was 11-50%. Tissue from the infected samples of onion bulbs was used for the isolation. The identification was performed based on colony morphology and microscopic features and confirmed through molecular markers using ITS and Tef-1α gene primers. Of the ten Fusarium isolates collected from selected locations, six species were confirmed as F. acutatum and four as F. falciforme. The pathogenicity tests performed with onion seedlings and bulbs under moist conditions proved that both F. acutatum and F. falciforme independently could cause basal rot disease symptoms but with different degrees of virulence. Koch's postulates were confirmed by reisolating the same pathogens from the infected plants. Thus, the active prevalence of FBR was confirmed in Maharashtra and also, to the best of our knowledge, this is the first report of F. falciforme and F. acutatum causing basal rot of onion independently in Maharashtra, India.

7.
Soft Matter ; 20(25): 4972-4987, 2024 Jun 26.
Artigo em Inglês | MEDLINE | ID: mdl-38874504

RESUMO

Understanding the stability of thin liquid trilayer films is of direct relevance to applications such as multilayer coatings and polymer processing. The stability of trilayer films can also be used to provide insights into emulsion dynamics, such as the rupture of the thin film formed between two droplets during coalescence. Often, emulsions are laden with surfactants and other additives, which can be present in one or both phases as well as at the interfaces between the liquids. In experimental studies, complicating factors such as variations in droplet sizes, curvatures, and collision processes make it difficult to specifically isolate the influence of surfactant transport on droplet coalescence and film rupture. The present work addresses this issue by systematic consideration of a model problem involving a thin liquid trilayer film. Surfactant is soluble in either the outer layers or the inner layer, corresponding to surfactant soluble in the droplets or the continuous phase. Rupture of the inner layer is driven by van der Waals forces. Lubrication theory is applied to derive coupled nonlinear evolution equations describing the perturbations to the interface positions and the surfactant concentrations. Our findings reveal that surfactant better stabilizes the film when soluble in the inner layer, and the stabilizing effect is more pronounced when the outer layers are thicker. These findings are consistent with experimental observations involving emulsions, where emulsions tend to be more stable when surfactant is in the continuous phase rather than in the droplets, with the distinction being more pronounced when droplets are larger.

8.
Indian J Otolaryngol Head Neck Surg ; 76(3): 2675-2683, 2024 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-38883498

RESUMO

Otitis media is a common childhood disease in developing countries and is the most important cause of preventable hearing loss among Indian children. To study the knowledge, attitude, and practices regarding risk factors for otitis media among caretakers of children in Puducherry. This was a questionnaire based descriptive cross-sectional study conducted from April 2023 to June 2023. All the caregivers of children aged 2-12 years presented or diagnosed with otitis media under our inclusion criteria were interviewed. Overall, most caretakers displayed good knowledge (67%), positive attitude (62%) and good care-seeking practices (49%). There was a positive correlation with sociodemographic parameters. The odd's ratio for overcrowding was high (OR = 4, p = 0.042 for knowledge and attitude, OR = 3.929, p = 0.041 for practices). Higher score was seen among middle class with odd's ratio 1.417 for knowledge and attitude and 4.875 for practices (p = 0.041). Graduate parents had higher score with the odd's ratio that was statistically significant. Most of the caregivers had a good knowledge regarding symptoms of otitis media and an acceptable level of caregivers' attitude and care seeking practices. Higher scores were associated with overcrowding, socioeconomic status, parental education. Improvement in risk factors and providing health education will reduce prevalence of OM in children and thereby reduce preventable hearing loss in children. Supplementary Information: The online version contains supplementary material available at 10.1007/s12070-024-04551-9.

9.
Med Sci Educ ; 34(3): 705-713, 2024 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-38887400

RESUMO

Proficiency in surface anatomy knowledge plays a pivotal role in fostering complication-free and efficacious clinical practice across a wide spectrum of healthcare specialties. This comprehensive understanding and adept utilization of surface anatomy principles serve as the linchpin for deciphering normal anatomical structures within medical imaging and the aptitude to articulate the topographical attributes, visual characteristics, and interrelations of palpable anatomical entities. Despite the advent of advanced direct visualization techniques, such as ultrasound guidance, which assist in interventional procedures, clinicians have not relinquished the indispensable requirement for pertinent surface anatomy knowledge to ensure the successful and secure execution of procedures. Regrettably, evidence-based surface anatomy remains an underemphasized facet in the pedagogy of anatomical sciences. The current narrative review underscores the various methodologies employed in imparting surface anatomy education to students. However, it is noteworthy that no singular, unequivocal best practice has emerged for the teaching and acquisition of surface anatomy knowledge. Therefore, as custodians of anatomical education, there is a pressing need to innovate and amalgamate contemporary pedagogical approaches with state-of-the-art technologies to furnish students with evidence-based surface anatomy insights, thereby enhancing comprehension, retention, and the lasting utility of this essential domain of medical knowledge.

10.
MethodsX ; 12: 102754, 2024 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-38846433

RESUMO

Attention mechanism has recently gained immense importance in the natural language processing (NLP) world. This technique highlights parts of the input text that the NLP task (such as translation) must pay "attention" to. Inspired by this, some researchers have recently applied the NLP domain, deep-learning based, attention mechanism techniques to predictive maintenance. In contrast to the deep-learning based solutions, Industry 4.0 predictive maintenance solutions that often rely on edge-computing, demand lighter predictive models. With this objective, we have investigated the adaptation of a simpler, incredibly fast and compute-resource friendly, "Nadaraya-Watson estimator based" attention method. We develop a method to predict tool-wear of a milling machine using this attention mechanism and demonstrate, with the help of heat-maps, how the attention mechanism highlights regions that assist in predicting onset of tool-wear. We validate the effectiveness of this adaptation on the benchmark IEEEDataPort PHM Society dataset, by comparing against other comparatively "lighter" machine learning techniques - Bayesian Ridge, Gradient Boosting Regressor, SGD Regressor and Support Vector Regressor. Our experiments indicate that the proposed Nadaraya-Watson attention mechanism performed best with an MAE of 0.069, RMSE of 0.099 and R2 of 83.40 %, when compared to the next best technique Gradient Boosting Regressor with figures of 0.100, 0.138, 66.51 % respectively. Additionally, it produced a lighter and faster model as well.•We propose a Nadaraya-Watson estimator based "attention mechanism", applied to a predictive maintenance problem.•Unlike the deep-learning based attention mechanisms from the NLP domain, our method creates fast, light and high-performance models, suitable for edge computing devices and therefore supports the Industry 4.0 initiative.•Method validated on real tool-wear data of a milling machine.

11.
Cureus ; 16(4): e57785, 2024 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-38721174

RESUMO

INTRODUCTION: Reducing the healing period after surgical placement of dental implants can facilitate the loading of dental prostheses. AIM: The aim is to compare the osteogenic potential of unmodified titanium disks with titanium disks that were surface-modified or hydrogel-coated. MATERIALS AND METHODOLOGY: One hundred eight titanium disks (Ø6 × 2-mm) were divided into three groups: (1) unmodified titanium as control (Ti-C); (2) sandblasted and acid-etched (Ti-SLA), and (3) coated with tamarind kernel polysaccharide hydrogel grafted with acrylic acid (Ti-TKP-AA). The osteogenic potential and cytotoxic effect of various groups of titanium were compared using human osteoblasts Saos-2. The surface topography of the titanium disks and morphology of osteoblasts grown on disks were investigated by scanning electron microscopy (n = 3). Cell attachment to the disks and actin expression intensity were investigated by confocal imaging (n = 3). Cytotoxicity was quantified by cell viability assay (n = 9). Osteoblast maturation was determined by alkaline phosphatase assay (n = 9). Cell mineralization was quantified by Alizarin red staining (n = 9). One-way analysis of variance followed by Tukey's multiple comparisons test was used for intergroup comparisons (α= 0.05). RESULTS: The surface modifications on Ti-SLA and Ti-TKP-AA support better morphology and proliferation of osteoblasts than Ti-C (P< 0.001) and significantly higher levels of actin cytoskeleton accumulation (P< 0.0001). Ti-TKP-AA showed a significantly higher maturation rate than Ti-C (P< 0.001). Ti-TKP-AA showed > twofold increased mineralization than Ti-C and Ti-SLA (P< 0.001). CONCLUSIONS: TKP-AA hydrogel-coated titanium promotes faster osteoblast proliferation, maturation, and mineralization than SLA-treated or untreated titanium. These advantages can be explored for achieving early osseointegration and prosthetic loading of titanium dental implants.

12.
Cureus ; 16(4): e58473, 2024 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-38765326

RESUMO

The study of human cadavers is essential for teaching, advanced training, and research in medical and anatomical sciences. Medical institutions around the globe presently face a scarcity of cadaver supplies. For the majority of countries, unclaimed bodies are still the primary source of cadavers despite guidelines issued by the International Federation of Associations of Anatomists, which discourage the use of unclaimed bodies. This self-funded study aims to conduct a review of the existing national and international laws safeguarding the several rights of a deceased person. The study also reviewed the existing anatomy acts (and related acts) across various countries that facilitate cadaver supply for anatomy education and research. According to Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines, an online search for publications in four medical databases (PubMed, Scopus, Web of Sciences, and Google Scholar) was conducted from 1950 till 2022. A research review protocol was registered in PROSPERO prospectively (registration ID: CRD42023469534) using the Mesh terms like cadaver, anatomy education, dead person and rights, body donation program, unclaimed bodies, and anatomy acts. After the application of the eligibility criteria, 149 publications were shortlisted. After reviewing all the shortlisted articles, laws, and guidelines, using the data extraction checklist prepared by both authors, five international laws, three supreme court case decisions, two high court case decisions, four Indian penal Code Sections, and 22 anatomy acts were selected. Articles from other medical databases could not be reviewed, which was the limitation of this study. The anatomy/human tissue/tissue transplantation acts and advisories from regulatory bodies of individual African, Middle-Eastern, and European countries could not be retrieved. The review findings will emphasize the distinctions between India's anatomy acts and those of other developed nations, thereby broadening our perspective as we propose a model anatomy act for uniform implementation across the country to streamline the procurement of cadavers.

13.
Genes (Basel) ; 15(5)2024 04 28.
Artigo em Inglês | MEDLINE | ID: mdl-38790197

RESUMO

Currently, more than 55 million people around the world suffer from dementia, and Alzheimer's Disease and Related Dementias (ADRD) accounts for nearly 60-70% of all those cases. The spread of Alzheimer's Disease (AD) pathology and progressive neurodegeneration in the hippocampus and cerebral cortex is strongly correlated with cognitive decline in AD patients; however, the molecular underpinning of ADRD's causality is still unclear. Studies of postmortem AD brains and animal models of AD suggest that elevated endoplasmic reticulum (ER) stress may have a role in ADRD pathology through altered neurocellular homeostasis in brain regions associated with learning and memory. To study the ER stress-associated neurocellular response and its effects on neurocellular homeostasis and neurogenesis, we modeled an ER stress challenge using thapsigargin (TG), a specific inhibitor of sarco/endoplasmic reticulum Ca2+ ATPase (SERCA), in the induced pluripotent stem cell (iPSC)-derived neural stem cells (NSCs) of two individuals from our Mexican American Family Study (MAFS). High-content screening and transcriptomic analysis of the control and ER stress-challenged NSCs showed that the NSCs' ER stress response resulted in a significant decline in NSC self-renewal and an increase in apoptosis and cellular oxidative stress. A total of 2300 genes were significantly (moderated t statistics FDR-corrected p-value ≤ 0.05 and fold change absolute ≥ 2.0) differentially expressed (DE). The pathway enrichment and gene network analysis of DE genes suggests that all three unfolded protein response (UPR) pathways, protein kinase RNA-like ER kinase (PERK), activating transcription factor-6 (ATF-6), and inositol-requiring enzyme-1 (IRE1), were significantly activated and cooperatively regulated the NSCs' transcriptional response to ER stress. Our results show that IRE1/X-box binding protein 1 (XBP1) mediated transcriptional regulation of the E2F transcription factor 1 (E2F1) gene, and its downstream targets have a dominant role in inducing G1/S-phase cell cycle arrest in ER stress-challenged NSCs. The ER stress-challenged NSCs also showed the activation of C/EBP homologous protein (CHOP)-mediated apoptosis and the dysregulation of synaptic plasticity and neurotransmitter homeostasis-associated genes. Overall, our results suggest that the ER stress-associated attenuation of NSC self-renewal, increased apoptosis, and dysregulated synaptic plasticity and neurotransmitter homeostasis plausibly play a role in the causation of ADRD.


Assuntos
Doença de Alzheimer , Estresse do Retículo Endoplasmático , Humanos , Doença de Alzheimer/genética , Doença de Alzheimer/metabolismo , Doença de Alzheimer/patologia , Células-Tronco Neurais/metabolismo , Células-Tronco Neurais/patologia , Proteínas Serina-Treonina Quinases/genética , Proteínas Serina-Treonina Quinases/metabolismo , Endorribonucleases/genética , Endorribonucleases/metabolismo , Células-Tronco Pluripotentes Induzidas/metabolismo , Tapsigargina/farmacologia , Demência/genética , Demência/metabolismo , Demência/patologia , eIF-2 Quinase/genética , eIF-2 Quinase/metabolismo , Masculino , Fator 6 Ativador da Transcrição/metabolismo , Fator 6 Ativador da Transcrição/genética , Neurogênese , Proteína 1 de Ligação a X-Box/metabolismo , Proteína 1 de Ligação a X-Box/genética , Feminino , Resposta a Proteínas não Dobradas , Fator de Transcrição CHOP
14.
Soft Matter ; 20(23): 4567-4582, 2024 Jun 12.
Artigo em Inglês | MEDLINE | ID: mdl-38809054

RESUMO

Complex fluids including colloidal suspensions, microgels, and entangled wormlike micelles (WLMs) can develop heterogeneous flow regions under imposed steady shear. In some of these systems, the evolution to this flow state from rest is accompanied by flow reversal - when a portion of the fluid moves opposite to the imposed flow direction. Flow reversal was proposed to occur in shear startup when (1) the fluid has significant elasticity, and (2) the flow becomes heterogeneous immediately following the stress overshoot [McCauley et al., J. Rheol., 2023, 67, 661-681]. To verify this hypothesis, a new method is developed for measuring flow heterogeneity. Upon cessation of the imposed flow, elasticity and flow heterogeneity cause retraction of the fluid, which is quantified with particle tracking velocimetry. Flow is stopped at key times during shear startup in two systems: a gel-like WLM that exhibits flow reversal before heterogeneous flow and a viscoelastic, fluid-like WLM that does not. The degree of flow heterogeneity is inferred from the shape and magnitude of velocity profiles measured during retraction. Flow heterogeneity develops earlier in gel-like WLMs - supporting the proposed flow reversal criteria. For comparison, heterogeneous Couette flows described with the upper-convected Maxwell or Germann-Cook-Beris models are analyzed. These theoretical flow problems confirm that stark differences in rheological properties across the flow geometry can cause significant fluid retraction and reproduce key features of the experimentally observed retraction. This new method can be used to extract quantitative information about spatially heterogeneous flows in viscoelastic complex fluids, whether or not flow reversal occurs.

15.
ACS Appl Mater Interfaces ; 16(20): 26664-26673, 2024 May 22.
Artigo em Inglês | MEDLINE | ID: mdl-38739213

RESUMO

High-power impulse magnetron sputtering (HiPIMS) plus kick is a physical vapor deposition method that employs bipolar microsecond-scale voltage pulsing to precisely control the ion energy during sputter deposition. HiPIMS plus kick for AlN deposition is difficult since nitride deposition is challenged by low surface diffusion and high susceptibility to ion damage. In this current study, a systematic examination of the process parameters of HiPIMS plus kick was conducted. Under optimized main negative pulsing conditions, this study documented that a 25 V positive kick biasing for AlN deposition is ideal for optimizing a high quality film, as shown by X-ray diffraction and transmission electron microscopy as well as optimal thermal conductivity while increasing high speed deposition (25 nm/min) and obtaining ultrasmooth surfaces (rms roughness = 0.5 nm). HiPIMS plus kick was employed to deposit a single-texture 1 µm AlN film with a 7.4° rocking curve, indicating well oriented grains, which correlated with high thermal conductivity (121 W/m·K). The data are consistent with the optimal kick voltage enabling enhanced surface diffusion due to ion-substrate collisions without damaging the AlN grains.

16.
BMC Plant Biol ; 24(1): 411, 2024 May 17.
Artigo em Inglês | MEDLINE | ID: mdl-38760694

RESUMO

BACKGROUND: Wheat rusts are important biotic stresses, development of rust resistant cultivars through molecular approaches is both economical and sustainable. Extensive phenotyping of large mapping populations under diverse production conditions and high-density genotyping would be the ideal strategy to identify major genomic regions for rust resistance in wheat. The genome-wide association study (GWAS) population of 280 genotypes was genotyped using a 35 K Axiom single nucleotide polymorphism (SNP) array and phenotyped at eight, 10, and, 10 environments, respectively for stem/black rust (SR), stripe/yellow rust (YR), and leaf/brown rust (LR). RESULTS: Forty-one Bonferroni corrected marker-trait associations (MTAs) were identified, including 17 for SR and 24 for YR. Ten stable MTAs and their best combinations were also identified. For YR, AX-94990952 on 1A + AX-95203560 on 4A + AX-94723806 on 3D + AX-95172478 on 1A showed the best combination with an average co-efficient of infection (ACI) score of 1.36. Similarly, for SR, AX-94883961 on 7B + AX-94843704 on 1B and AX-94883961 on 7B + AX-94580041 on 3D + AX-94843704 on 1B showed the best combination with an ACI score of around 9.0. The genotype PBW827 have the best MTA combinations for both YR and SR resistance. In silico study identifies key prospective candidate genes that are located within MTA regions. Further, the expression analysis revealed that 18 transcripts were upregulated to the tune of more than 1.5 folds including 19.36 folds (TraesCS3D02G519600) and 7.23 folds (TraesCS2D02G038900) under stress conditions compared to the control conditions. Furthermore, highly expressed genes in silico under stress conditions were analyzed to find out the potential links to the rust phenotype, and all four genes were found to be associated with the rust phenotype. CONCLUSION: The identified novel MTAs, particularly stable and highly expressed MTAs are valuable for further validation and subsequent application in wheat rust resistance breeding. The genotypes with favorable MTA combinations can be used as prospective donors to develop elite cultivars with YR and SR resistance.


Assuntos
Basidiomycota , Resistência à Doença , Estudo de Associação Genômica Ampla , Doenças das Plantas , Polimorfismo de Nucleotídeo Único , Triticum , Triticum/genética , Triticum/microbiologia , Doenças das Plantas/microbiologia , Doenças das Plantas/genética , Resistência à Doença/genética , Basidiomycota/fisiologia , Fenótipo , Genes de Plantas , Genótipo , Puccinia/fisiologia , Locos de Características Quantitativas
17.
Soft Matter ; 20(16): 3529-3540, 2024 Apr 24.
Artigo em Inglês | MEDLINE | ID: mdl-38602343

RESUMO

Droplets on inclined substrates can depin and slide freely above a critical substrate inclination angle. Pinning can be caused by topographical defects on the substrate, and understanding the influence of defect geometry on the pinning-depinning transition is important for diverse applications such as fog harvesting, droplet-based microfluidic devices, self-cleaning surfaces, and inkjet printing. Here, we develop a lubrication-theory-based model to investigate the motion of droplets on inclined substrates with a single three-dimensional Gaussian-shaped defect that can be in the form of a bump or a dent. A precursor-film/disjoining-pressure approach is used to capture contact-line motion, and a nonlinear evolution equation is derived which describes droplet thickness as a function of the position along the substrate and time. The evolution equation is solved numerically using an alternating direction implicit finite-difference scheme to study how the defect geometry influences the critical inclination angle and the shape of a pinned droplet. It is found that the critical substrate inclination angle increases as the defect becomes taller/deeper or wider along the direction lateral to the droplet-sliding direction. However, the critical inclination angle decreases as the defect becomes wider along the sliding direction. Below the critical inclination angle, the advancing contact line of the droplet at the droplet centerline is pinned to the defect at the point having maximum negative slope. Simple scaling relations that reflect the influence of defect geometry on the droplet retention force arising from surface tension are able to account for many of the trends observed in the numerical simulations.

18.
Sci Rep ; 14(1): 9374, 2024 04 23.
Artigo em Inglês | MEDLINE | ID: mdl-38653777

RESUMO

Colletotrichum is an important plant pathogenic fungi that causes anthracnose/-twister disease in onion. This disease was prevalent in the monsoon season from August to November months and the symptoms were observed in most of the fields. This study aimed to investigate the pathogenicity and cumulative effect, if any of Colletotrichum gloeosporioides and Fusarium acutatum. The pot experiment was laid out to identify the cause responsible for inciting anthracnose-twister disease, whether the Colletotrichum or Fusarium or both, or the interaction of pathogens and GA3. The results of the pathogenicity test confirmed that C. gloeosporioides and F. acutatum are both pathogenic. C. gloeosporioides caused twisting symptoms independently, while F.acutatum independently caused only neck elongation. The independent application of GA3 did not produce any symptoms, however, increased the plant height. The combined treatment of C. gloeosporioides and F. acutatum caused twisting, which enhanced upon interaction with GA3 application giving synergistic effect. The acervuli were found in lesions infected with C. gloeosporioides after 8 days of inoculation on the neck and leaf blades. Symptoms were not observed in untreated control plants. Koch's postulates were confirmed by reisolating the same pathogens from the infected plants.


Assuntos
Colletotrichum , Fusarium , Cebolas , Doenças das Plantas , Colletotrichum/patogenicidade , Fusarium/patogenicidade , Doenças das Plantas/microbiologia , Cebolas/microbiologia
19.
Int J Biol Macromol ; 267(Pt 2): 131367, 2024 May.
Artigo em Inglês | MEDLINE | ID: mdl-38583837

RESUMO

Chitosan (CS)-based bio-nanocomposite food packaging films were prepared via solvent-casting method by incorporating a unique combination of additives and fillers, including polyvinyl alcohol (PVA), glycerol, Tween 80, castor oil (CO), and nano titanium dioxide (TiO2) in various proportions to enhance film properties. For a comprehensive analysis of the synthesized films, Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD), thermogravimetric analysis (TGA), tensile testing, field emission scanning electron microscopy (FESEM), energy dispersive X-ray spectroscopy (EDS), and UV-vis spectrophotometry were employed. Furthermore, the antimicrobial efficacy of the films against S. aureus, E. coli, and A. niger was examined to assess their potential to preserve food from foodborne pathogens. The results claimed that the inclusion of castor oil and TiO2 nanoparticles considerably improved antimicrobial properties, UV-vis light barrier properties, thermal stability, optical transparency, and mechanical strength of the films, while reducing their water solubility, moisture content, water vapor and oxygen permeability. Based on the overall analysis, CS/PVA/CO/TiO2-0.3 film can be selected as the optimal one for practical applications. Furthermore, the practical application of the optimum film was evaluated using white bread as a model food product. The modified film successfully extended the shelf life of bread to 10 days, surpassing the performance of commercial LDPE packaging (6 days), and showed promising attributes for applications in the food packaging sector. These films exhibit superior antimicrobial properties, improved mechanical strength, and extended shelf life for food products, marking a sustainable and efficient alternative to conventional plastic packaging in both scientific research and industrial applications.


Assuntos
Pão , Quitosana , Embalagem de Alimentos , Nanocompostos , Titânio , Titânio/química , Quitosana/química , Nanocompostos/química , Embalagem de Alimentos/métodos , Pão/análise , Nanopartículas/química , Conservação de Alimentos/métodos , Permeabilidade , Termogravimetria , Resistência à Tração , Antibacterianos/química , Antibacterianos/farmacologia , Escherichia coli/efeitos dos fármacos , Difração de Raios X
20.
Artigo em Inglês | MEDLINE | ID: mdl-38619066

RESUMO

BACKGROUND: The Psoas Minor (PMi) is the most unstable muscle of the psoas group of the posterior abdominal muscle. This muscle has a fusiform shape and consists of a short fusiform belly continuing distally as a long tendon inserted on the pecten pubis and the iliopectineal arch. The present study was conducted to obtain more detailed information about the muscle and to expand knowledge about its morphology and morphometry. MATERIALS AND METHODS: The posterior abdominal wall of 30 adult cadavers was dissected. Anatomical variabilities in origin, insertion, length, width, and muscle-to-cone ratio were measured when PMi was found. The data collected was interpreted descriptively. RESULTS: PMi was found in 12 cases, ten bilateral and two unilateral. The origin was constant in all cases and, except for three cases, extended into the iliac fascia and the iliopubic eminence. Morphometric analysis revealed that the average length of the proximal muscle belly and distal tendons was 4.52 ± 1.35 cm and 13.05 ± 0.90 cm, respectively. The mean width of the muscle belly was 1.71 ± 0.17 cm, and that of the tendon was 0.47 ± 0.10 cm. On average, the muscle belly occupied the proximal 33.71 ± 6.15% of the total musculotendinous unit. CONCLUSIONS: Findings confirm the inconsistency of PMi in the study population. Morphological variations became more evident as the tendon approached the insertion level. The muscle's distal attachment to the iliac fascia may partially control the position, mechanical stability of the underlying iliopsoas and this circumstantial function may be clinically related to iliopsoas inflammation and pathology. However, further studies recommended to determine biomechanical validity and clinical applicability of this vestigial muscle in human.

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