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1.
Cureus ; 16(8): e68354, 2024 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-39359571

RESUMO

Immune thrombocytopenic purpura (ITP) is an autoimmune disorder characterized by a low platelet count, which can lead to increased bleeding and bruising. Systemic lupus erythematosus (SLE) is a chronic autoimmune disease that can affect multiple organ systems and often presents with various hematologic abnormalities, including thrombocytopenia. A 32-year-old woman presented to the emergency department with petechiae, extensive ecchymosis, rectal bleeding, generalized body aches, anorexia, and weakness. Despite showing no clinical features of SLE, laboratory findings revealed severe thrombocytopenia and anemia. Initial treatment with low-dose steroids showed no improvement, but a high-dose steroid regimen significantly increased her platelet count. Further investigations revealed elevated ANA and positive anti-dsDNA, leading to a diagnosis of isolated thrombocytopenia as the initial manifestation of SLE. The subsequent findings of elevated ANA and positive anti-dsDNA confirmed the diagnosis of SLE, with ITP as its initial manifestation. This case underscores the importance of considering underlying autoimmune diseases in patients presenting with isolated thrombocytopenia after ruling out other causes. Early recognition and appropriate treatment of autoimmune conditions like SLE can significantly improve patient outcomes, even when initial presentations are atypical.

2.
Curr Microbiol ; 81(11): 394, 2024 Oct 07.
Artigo em Inglês | MEDLINE | ID: mdl-39375258

RESUMO

Microbial lipases (MLs) are pivotal biocatalysts in lipid biotechnology due to their diverse enzymatic properties and substrate specificity, garnering significant research attention. This comprehensive review explores the significance of MLs in biocatalysis, providing insights into their structure, catalytic domain, and oxyanion hole. The catalytic mechanism is elucidated, highlighting the molecular processes driving their efficiency. The review delves into ML sources, spanning fungi, yeasts, bacteria, and actinomycetes, followed by a discussion on classification and characterization. Emphasizing the scattered findings in the literature, the paper consolidates the latest information on ML applications across various industries, from food and pharmaceuticals to biofuel production and the paper and pulp industry. The review captures the dynamic landscape of ML research, emphasizing their structure-function relationships and practical implications across diverse sectors.


Assuntos
Bactérias , Biocatálise , Fungos , Lipase , Lipase/química , Lipase/metabolismo , Lipase/genética , Bactérias/enzimologia , Bactérias/genética , Fungos/enzimologia , Fungos/química , Especificidade por Substrato , Domínio Catalítico , Proteínas de Bactérias/química , Proteínas de Bactérias/metabolismo , Proteínas de Bactérias/genética , Proteínas Fúngicas/química , Proteínas Fúngicas/metabolismo , Proteínas Fúngicas/genética
4.
BMC Med Educ ; 24(1): 789, 2024 Jul 23.
Artigo em Inglês | MEDLINE | ID: mdl-39044207

RESUMO

BACKGROUND: Smart phone technology including different instant messaging applications like, WhatsApp, can be used for the development of radiological skills, reporting, and performance. To determine the utility, attitude, and outcome of WhatsApp for augmenting education in FCPS radiology residency program. To assess the opinion of radiology residents regarding WhatsApp as a tool to enhance postgraduate training. METHODOLOGY: A mixed method (qualitative and quantitative) was conducted at Dow Institute of Radiology, Karachi, Pakistan. All FCPS Radiology residents were given a radiological case by principal investigator followed by residents' response in 24 h. Key findings were shared by the mentor. Before and after the intervention of WhatsApp, all residents were evaluated with written and radiological imaging reporting exam. For quantitative analysis, a closed ended questionnaire was used containing information about total number of messages, images, webpage links shared, level of contribution (active/non-active), and utility (contribution in education related topic only). A feedback form with Likert scale was also got filled by all residents. For qualitative research, semi structured interviews (SSIs) were conducted. RESULTS: Median number of total images shared were 293 (IQR 1002 images), messages shared 110 (IQR), webpages shared were 54 webpages (61 webpages) and total contents shared by participants was 243 (544 contents). Active contributors showed better performance in utility, competency of contents and attitude towards using social media as a medium for learning. Comparison of written and OSCE results showed better performance after the intervention. Feedback form with Likert scale revealed that students responded positively regarding the shared learning content. Thematic analysis showed 52 codes and 16 themes. CONCLUSION: In this research we have observed that WhatsApp is highly efficient and productive academic tool which can amplify postgraduate radiology education. Student's narrative reflects that residents have found the missing link which can take them to radiological professional excellence through targeted high-profile learning outside lecture hall in time and place convenient motivational environment. Once it will be blended with existing teaching strategy, it can prove to be a game changer.


Assuntos
Educação de Pós-Graduação em Medicina , Internato e Residência , Aplicativos Móveis , Radiologia , Humanos , Radiologia/educação , Envio de Mensagens de Texto , Paquistão , Feminino , Masculino , Inquéritos e Questionários , Competência Clínica , Avaliação Educacional
5.
J Pak Med Assoc ; 74(6): 1119-1123, 2024 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-38948983

RESUMO

Objective: To compare the perception of dental students and faculty members regarding the attributes of effective clinical teachers. METHODS: This cross-sectional study was conducted at the Dow University of Health Sciences, Karachi, from August 2021 to November 2021, and comprised of third and final year dental students and associated clinical faculty members from three dental colleges in the city. Data was collected using the modified version of a pre-validated questionnaire. Data was analysed using SPSS 25. RESULTS: Of the 200 students approached, 169(84.5%) responded; 135(79.9%) females and 34(20.1%) males with mean age 21.78±1.099 years (range: 19-26 years). Of the 59 teachers approached, 49(83%) responded; 33(67.3%) females and 16(32.7%) males with mean age 31.59±5.041 years (range: 23-49 years). The students found record-keeping a tiresome task 69(42%), while teachers regarded it essential for clinical development. Unlike teachers, the students were unable to identify the relevance of clinical objectives and they also did not appreciate teachers' involvement in clinical procedures. For other domains regarding personal traits, teaching methods and clinical skills, both groups had similar responses. Conclusion: There was generally a similarity of opinions among students and teachers regarding the essential qualities of effective dental clinical teaching.


Assuntos
Docentes de Odontologia , Estudantes de Odontologia , Humanos , Feminino , Masculino , Estudantes de Odontologia/psicologia , Estudantes de Odontologia/estatística & dados numéricos , Estudos Transversais , Adulto , Adulto Jovem , Paquistão , Educação em Odontologia/métodos , Pessoa de Meia-Idade , Inquéritos e Questionários , Competência Clínica , Ensino , Atitude do Pessoal de Saúde
6.
Int J Biol Macromol ; 276(Pt 2): 133875, 2024 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-39019366

RESUMO

A novel biodegradable film was fabricated by incorporating bacterial nanocellulose stabilized valerian root extract (VRE) Pickering emulsion into karaya gum with better antioxidant and antibacterial properties for lamb meat preservation. The valerian root extract Pickering emulsion (VPE) exhibited 98 ± 1.84 % encapsulating efficiency and excellent physical stability with an average particle size of 274.6 nm. The incorporation of VPE-5 into the film matrix increased its elongation at break (EAB), and improved water resistance and barrier properties against oxygen, water vapor, and UV light. Moreover, the antioxidant and anti-bacterial properties against S.aerous and E. coli were also improved based on VPE-5 concentration. The SEM images showed a uniform distribution of VPE-5 while FTIR and XRD revealed its compatibility with karaya gum, which improved its thermal stability. The active films showed a significant preservative effect by reducing the pH, total volatile basic nitrogen (TVB-N), thiobarbituric acid reactive substances (TBARS), and total viable count (TVC) value of lamb meat and maintained its texture and color during the storage period of 9 days at 4 °C. These results demonstrated the inclusion of VPE-5 into Karaya gum was a promising technique and offers a great potential application as a bioactive material in food packaging.


Assuntos
Celulose , Emulsões , Embalagem de Alimentos , Conservação de Alimentos , Goma de Karaya , Extratos Vegetais , Raízes de Plantas , Valeriana , Celulose/química , Extratos Vegetais/química , Extratos Vegetais/farmacologia , Conservação de Alimentos/métodos , Raízes de Plantas/química , Embalagem de Alimentos/métodos , Animais , Valeriana/química , Goma de Karaya/química , Antioxidantes/farmacologia , Antioxidantes/química , Antibacterianos/farmacologia , Antibacterianos/química , Ovinos , Carne Vermelha/análise , Carne Vermelha/microbiologia , Escherichia coli/efeitos dos fármacos
7.
Science ; 384(6700): eadn0886, 2024 Jun 07.
Artigo em Inglês | MEDLINE | ID: mdl-38843332

RESUMO

In addition to their intrinsic rewarding properties, opioids can also evoke aversive reactions that protect against misuse. Cellular mechanisms that govern the interplay between opioid reward and aversion are poorly understood. We used whole-brain activity mapping in mice to show that neurons in the dorsal peduncular nucleus (DPn) are highly responsive to the opioid oxycodone. Connectomic profiling revealed that DPn neurons innervate the parabrachial nucleus (PBn). Spatial and single-nuclei transcriptomics resolved a population of PBn-projecting pyramidal neurons in the DPn that express µ-opioid receptors (µORs). Disrupting µOR signaling in the DPn switched oxycodone from rewarding to aversive and exacerbated the severity of opioid withdrawal. These findings identify the DPn as a key substrate for the abuse liability of opioids.


Assuntos
Analgésicos Opioides , Aprendizagem da Esquiva , Transtornos Relacionados ao Uso de Opioides , Oxicodona , Núcleos Parabraquiais , Córtex Pré-Frontal , Receptores Opioides mu , Recompensa , Animais , Masculino , Camundongos , Analgésicos Opioides/farmacologia , Conectoma , Camundongos Endogâmicos C57BL , Neurônios/metabolismo , Neurônios/fisiologia , Transtornos Relacionados ao Uso de Opioides/metabolismo , Oxicodona/farmacologia , Núcleos Parabraquiais/metabolismo , Córtex Pré-Frontal/metabolismo , Córtex Pré-Frontal/efeitos dos fármacos , Córtex Pré-Frontal/fisiologia , Células Piramidais/metabolismo , Receptores Opioides mu/metabolismo , Receptores Opioides mu/genética , Síndrome de Abstinência a Substâncias/metabolismo , Transcriptoma
8.
Eur Heart J Case Rep ; 8(2): ytae047, 2024 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-38328598

RESUMO

Background: Sinus of Valsalva aneurysm (SVA) is a rare but potentially life-threatening condition. Acute myocardial infarction (MI) is a rare consequence of aneurysmal dilatation of one or more sinuses of Valsalva. We present a case of an unruptured and partially thrombosed left SVA, presenting as anterior MI and congestive heart failure. Case summary: A 55-year-old gentleman was admitted with pulmonary oedema and a late presenting ST-elevation MI with Q wave. After initial treatment on furosemide infusion, a coronary angiography showed significant stenosis in both his left main stem (LMS) and left anterior descending artery (LAD). This is likely a result of external compression, potentially from the enlarged left sinus of Valsalva. A subsequent transthoracic echocardiogram and transoesophageal echocardiogram (TOE) confirmed large SVA involving the left coronary cusp measured 9.9 cm compressing both LMS and LAD. Discussion: Left SVAs are rare and frequently asymptomatic, typically being identified incidentally. Due to the close proximity of the left coronary system, they can present with myocardial ischaemia due to extrinsic compression of the coronary system. We were able to perform a comprehensive multi-modality assessment of left SVA, which helped establish this unusual diagnosis and guide management. Transthoracic echocardiogram and TOE helped assess the SVA and demonstrated the thrombus in situ, aortic valve insufficiency, and cardiac function. The computed tomography scan aided in accurately defining the extent of the aneurysm and the extent of compression of the left coronary system and cardiac magnetic resonance scan was able to demonstrate viability in LAD and circumflex territory.

9.
Circ Cardiovasc Interv ; 17(3): e013367, 2024 03.
Artigo em Inglês | MEDLINE | ID: mdl-38410944

RESUMO

INTRODUCTION: Percutaneous coronary intervention for complex coronary disease is associated with a high risk of cardiogenic shock. This can cause harm and limit the quality of revascularization achieved, especially when left ventricular function is impaired at the outset. Elective percutaneous left ventricular unloading is increasingly used to mitigate adverse events in patients undergoing high-risk percutaneous coronary intervention, but this strategy has fiscal and clinical costs and is not supported by robust evidence. METHODS: CHIP-BCIS3 (Controlled Trial of High-Risk Coronary Intervention With Percutaneous Left Ventricular Unloading) is a prospective, multicenter, open-label randomized controlled trial that aims to determine whether a strategy of elective percutaneous left ventricular unloading is superior to standard care (no planned mechanical circulatory support) in patients undergoing nonemergent high-risk percutaneous coronary intervention. Patients are eligible for recruitment if they have severe left ventricular systolic dysfunction, extensive coronary artery disease, and are due to undergo complex percutaneous coronary intervention (to the left main stem with calcium modification or to a chronic total occlusion with a retrograde approach). Cardiogenic shock and acute ST-segment-elevation myocardial infarction are exclusions. The primary outcome is a hierarchical composite of all-cause death, stroke, spontaneous myocardial infarction, cardiovascular hospitalization, and periprocedural myocardial infarction, analyzed using the win ratio. Secondary outcomes include completeness of revascularization, major bleeding, vascular complications, health economic analyses, and health-related quality of life. A sample size of 250 patients will have in excess of 80% power to detect a hazard ratio of 0.62 at a minimum of 12 months, assuming 150 patients experience an event across all follow-up. CONCLUSIONS: To date, 169 patients have been recruited from 21 National Health Service hospitals in the United Kingdom, with recruitment expected to complete in 2024. REGISTRATION: URL: https://www.clinicaltrials.gov; Unique identifier: NCT05003817.


Assuntos
Doença da Artéria Coronariana , Infarto do Miocárdio , Intervenção Coronária Percutânea , Humanos , Doença da Artéria Coronariana/diagnóstico por imagem , Doença da Artéria Coronariana/terapia , Infarto do Miocárdio/etiologia , Intervenção Coronária Percutânea/efeitos adversos , Estudos Prospectivos , Qualidade de Vida , Choque Cardiogênico/diagnóstico , Choque Cardiogênico/terapia , Choque Cardiogênico/etiologia , Medicina Estatal , Resultado do Tratamento , Ensaios Clínicos Controlados Aleatórios como Assunto , Estudos Multicêntricos como Assunto
10.
Heart ; 110(7): 500-507, 2024 Mar 12.
Artigo em Inglês | MEDLINE | ID: mdl-38103913

RESUMO

OBJECTIVE: To investigate whether a very early invasive strategy (IS)±revascularisation improves clinical outcomes compared with standard care IS in higher risk patients with non-ST-elevation acute coronary syndrome (NSTE-ACS). METHODS: Multicentre, randomised, controlled, pragmatic strategy trial of higher risk patients with NSTE-ACS, defined by Global Registry of Acute Coronary Events 2.0 score of ≥118, or ≥90 with at least one additional high-risk feature. Participants were randomly assigned to very early IS±revascularisation (<90 min from randomisation) or standard care IS±revascularisation (<72 hours). The primary outcome was a composite of all-cause mortality, new myocardial infarction or hospitalisation for heart failure at 12 months. RESULTS: The trial was discontinued early by the funder due to slow recruitment during the COVID-19 pandemic. 425 patients were randomised, of whom 413 underwent an IS: 204 to very early IS (median time from randomisation: 1.5 hours (IQR: 0.9-2.0)) and 209 to standard care IS (median: 44.0 hours (IQR: 22.9-72.6)). At 12 months, there was no significant difference in the primary outcome between the early IS (5.9%) and standard IS (6.7%) groups (OR 0.93, 95% CI 0.42 to 2.09; p=0.86). The incidence of stroke and major bleeding was similar. The length of hospital stay was reduced with a very early IS (3.9 days (SD 6.5) vs 6.3 days (SD 7.6), p<0.01). CONCLUSIONS: A strategy of very early IS did not improve clinical outcomes compared with a standard care IS in higher risk patients with NSTE-ACS. However, the primary outcome rate was low and the trial was underpowered to detect such a difference. TRIAL REGISTRATION NUMBER: NCT03707314.


Assuntos
Síndrome Coronariana Aguda , Infarto do Miocárdio sem Supradesnível do Segmento ST , Intervenção Coronária Percutânea , Humanos , Síndrome Coronariana Aguda/diagnóstico , Pandemias , Resultado do Tratamento , Angiografia Coronária , Intervenção Coronária Percutânea/efeitos adversos
11.
Nanoscale Adv ; 5(24): 6967-6978, 2023 Dec 05.
Artigo em Inglês | MEDLINE | ID: mdl-38059016

RESUMO

Background and objective: Nanomaterials play significant roles in numerous industrial and engineering applications, like nuclear plants, paper production, thermal power plants, glass fibres, manufacturing of medicines, medical instruments, micro-electronics and polymer sheet extrusion. In view of such important applications, in this study, we discuss the magnetohydrodynamic flow of a nanofluid over an inclined surface by employing the Darcy-Forchheimer model. The Buongiorno model is applied to understand the various important aspects of the nanofluid. Radiation, magnetic field, dissipation and entropy generation in a chemically reactive flow are also discussed. Methodology: The governing nonlinear expressions were transformed into a dimensionless system through adequate transformations. The obtained non-dimensional systems were computed by the NDSolve approach. Results: Physical illustrations for the flow, temperature, concentration and entropy rate via emerging variables were examined. Here an enhancement in velocity was seen for the mixed convection variable, while opposite impacts on flow and temperature were noticed through the Hartman number. A higher Eckert number was obtained with a rise in temperature, while a decrease in concentration was noticed for the thermophoresis variable. An augmentation in the entropy rate was detected for radiation, while the thermal transport rate was boosted by thermophoresis.

12.
Nanoscale Adv ; 5(22): 6135-6147, 2023 Nov 07.
Artigo em Inglês | MEDLINE | ID: mdl-37941941

RESUMO

Objective: Nanoliquid flows are widely utilized in industrial, petroleum, engineering, and pharmaceutical applications including electric cooling, drug delivery, nuclear reactor cooling, solar collectors, heat exchangers, magnetohydrodynamic power generators, aerospace, porous media, thermal storage systems, and many others. Darcy-Forchheimer magnetized hybrid nanoliquid subjected to a stretchable cylinder was addressed, and the Cattaneo-Christov heat flux analysis was considered. Herein, disulfido (dithioxo) molybdenum (MoS4) and cobalt ferrite (CoFe2O4) were considered as nanoparticles, and engine oil as a conventional liquid. The thermal relationship of heat generation and radiation was discussed, and the influence of the entropy rate was addressed. Methodology: Governing expressions were transformed into dimensionless forms. Simulation by the ND-solve technique was implemented. Conclusions: Features for the entropy rate, liquid flow, and temperature against emerging variables for nanoliquid (MoS4/engine oil) and hybrid nanoliquid (MoS4 + CoFe2O4/engine oil) were explored. The numerical results of the coefficient of skin friction and thermal transport rate for nanoliquid (MoS4/engine oil) and hybrid nanoliquid (MoS4 + CoFe2O4/engine oil) were examined. Reduction in velocity clearly occurred through a magnetic field, whereas the reverse impact held for the entropy rate. The thermal field and entropy rate against the curvature parameter were enhanced. A decrease in liquid flow occurred for higher porosity variables. An enhancement in the entropy rate was witnessed for radiation and porosity parameters. Higher radiation and thermal relaxation time variables resulted in enhancement of the thermal transport rate.

13.
Vet Med (Praha) ; 68(7): 271-280, 2023 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-37982055

RESUMO

The present study aims to evaluate the prevalence and antimicrobial sensitivity of Staphylococcus aureus associated with bovine mastitis to selected antibiotics and plant extracts. In the current study, 140 milk samples were collected from cows and buffaloes. Among the 140 samples, 93 samples were positive for sub-clinical mastitis based on the California Mastitis Test (CMT). Out of the total positive samples, 45 were confirmed for S. aureus on a Mannitol salt agar media. The antimicrobial susceptibility test revealed that 44.82% of the isolates were resistant to cefoxitin (oxacillin) confirming methicillin-resistant S. aureus (MRSA) with a higher percentage (51.61%) in the buffalo than in the cow samples. Furthermore, the PCR assay confirmed the presence of the mecA gene in all the MRSA isolates. Among the seven tested antibiotics, sulfamethoxazole + trimethoprim showed high efficacy (71.1%) against methicillin-susceptible S. aureus isolates (MSSA). Oxytetracycline and sulfamethoxazole + trimethoprim showed 20% efficacy against MRSA followed by enrofloxacin (10%). On the other hand, the tested samples from Pistacia chinensis revealed that the ethyl acetate extract of bark showed a maximum zone of inhibition of 21.3 mm against MSSA and MRSA isolates at 3 000 µg/disc. Moreover, the methanol extract of Cotoneaster microphyllus formed a 12.3 mm and 9.1 mm zone of inhibition against the MSSA and MRSA isolates, respectively.

14.
Molecules ; 28(22)2023 Nov 20.
Artigo em Inglês | MEDLINE | ID: mdl-38005395

RESUMO

Pathogens cause infections and millions of deaths globally, while antipathogens are drugs or treatments designed to combat them. To date, multifunctional nanomaterials (NMs), such as organic, inorganic, and nanocomposites, have attracted significant attention by transforming antipathogen livelihoods. They are very small in size so can quickly pass through the walls of bacterial, fungal, or parasitic cells and viral particles to perform their antipathogenic activity. They are more reactive and have a high band gap, making them more effective than traditional medications. Moreover, due to some pathogen's resistance to currently available medications, the antipathogen performance of NMs is becoming crucial. Additionally, due to their prospective properties and administration methods, NMs are eventually chosen for cutting-edge applications and therapies, including drug administration and diagnostic tools for antipathogens. Herein, NMs have significant characteristics that can facilitate identifying and eliminating pathogens in real-time. This mini-review analyzes multifunctional NMs as antimicrobial tools and investigates their mode of action. We also discussed the challenges that need to be solved for the utilization of NMs as antipathogens.


Assuntos
Anti-Infecciosos , Nanoestruturas , Humanos , Animais , Gado , Estudos Prospectivos , Anti-Infecciosos/farmacologia
15.
Foods ; 12(22)2023 Nov 18.
Artigo em Inglês | MEDLINE | ID: mdl-38002226

RESUMO

Essential oils, consisting of volatile compounds, are derived from various plant parts and possess antibacterial and antioxidant properties. Certain essential oils are utilized for medicinal purposes and can serve as natural preservatives in food products, replacing synthetic ones. This review describes how essential oils can promote the performance of bioactive films and preserve food through their antioxidant and antibacterial properties. Further, this article emphasizes the antibacterial efficacy of essential oil composite films for food preservation and analyzes their manufacturing processes. These films could be an attractive delivery strategy for improving phenolic stability in foods and the shelf-life of consumable food items. Moreover, this article presents an overview of current knowledge of the extraction of essential oils, their effects on bioactive films and food preservation, as well as the benefits and drawbacks of using them to preserve food products.

16.
Water Sci Technol ; 88(7): 1847-1862, 2023 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-37831000

RESUMO

The current research work was carried out to simulate monthly streamflow historical record using Soil and Water Assessment Tool (SWAT) and Artificial Neural Network (ANN) at the Astore Basin, Gilgit-Baltistan, Pakistan. The performance of SWAT and ANN models was assessed during calibration (1985-2005) and validation (2006-2010) periods via statistical indicators such as coefficient of determination (R2), Nash-Sutcliffe efficiency (NSE), percent bias (PBIAS), and root-mean-square error (RMSE). R2, NSE, PBIAS, and RMSE values for SWAT (ANN with Architecture (2,27,1)) models during calibration are 0.80 (0.88), 0.73 (0.82), 15.7 (0.008), and 79.81 (70.34), respectively, while during validation, the corresponding values are 0.71 (0.86), 0.66 (0.95), 17.3 (0.10), and 106.26 (75.92). The results implied that the ANN model is superior to the SWAT model based on the statistical performance indicators. The SWAT results demonstrated an underestimation of the high flow and overestimation of the low flow. Comparatively, the ANN model performed very well in estimating the general and extreme flow conditions. The findings of this research highlighted its potential as a valuable tool for accurate streamflow forecasting and decision-making. The current study recommends that additional machine learning models may be compared with the SWAT model output to improve monthly streamflow predictions in the Astore Basin.


Assuntos
Solo , Água , Rios , Redes Neurais de Computação , Movimentos da Água
17.
SAGE Open Med ; 11: 20503121231206932, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-37900968

RESUMO

Objectives: Smoking is a potent risk factor for coronary artery disease, but there is controversy about its protective nature in terms of prognosis in ST-elevation acute coronary syndrome patients undergoing primary percutaneous coronary intervention. So, the main objective of this study is to unfold this controversy in a South Asian population in terms of clinical angiographic parameters and its in-hospital outcomes. Methods: In this study, we included 1756 consecutive patients diagnosed with ST-elevation acute coronary syndrome undergoing primary percutaneous coronary intervention. Patients were classified into smokers and non-smokers, and the in-hospital mortality rate was compared. Multivariable logistic regression analysis was performed to evaluate the paradoxical role of smoking. Results: Smokers were younger (53.78 ± 11.16 years vs 56.43 ± 11.17 years; p < 0.001) and more frequently men (98.7% vs 69.9%; p < 0.001) and had less diabetes (19.6% vs 44.8%; p < 0.001) and hypertension (38.5% vs 64.9%; p < 0.001). Smokers presented less frequently in Killip III (5.6% vs 8.1%; p < 0.001) and Killip IV (2.5% vs 4.8%; p < 0.001). Smokers mostly had single vessel disease (41.7% vs 34.4%; p = 0.013), whereas non-smokers had the multi-vessel disease and frequently presented with total occlusion of the culprit vessel (64.6% vs 58.8%; p = 0.040). Smokers have significantly lesser mortality (1.8% vs 4.3%; p = 0.009) compared to non-smokers with an odds ratio of 0.41 (95% confidence interval (CI): 0.21-0.82, p = 0.011); however, adjusted odds ratio on multivariable analysis was 0.67 (95% CI: 0.31-1.41, p = 0.290). Conclusions: The paradoxical protective role of smoking is the confounding effect of mainly younger age, less coronary artery disease burden, lower prevalence of diabetes and hypertension, and lower Killip III/IV at presentation.

18.
Nanoscale Adv ; 5(18): 4863-4872, 2023 Sep 12.
Artigo em Inglês | MEDLINE | ID: mdl-37705799

RESUMO

Here, the magnetohydrodynamic bioconvective flow of a non-Newtonian nanomaterial over a stretched sheet is scrutinized. The characteristics of convective conditions are analyzed. Irreversibility analysis in the presence of gyrotactic micro-organisms is discussed. Energy expression is assisted with thermal radiation, heat generation and ohmic heating. Buongiorno's model is employed to discuss the characteristics of the nanoliquid through thermophoresis and random diffusions. Nonlinear expressions of the given model are transformed through adequate transformations. The obtained expressions have been computed by the Newton built in-shooting technique. Results of influential variables for velocity, concentration, microorganism field, temperature and entropy rate are graphically studied. Clearly, velocity reduction is witnessed for the bioconvection Rayleigh number and magnetic variable. A higher heat generation variable leads to augmentation of temperature. An increase in the magnetic variable results in entropy and temperature enhancement. A higher Peclet number results in microorganism field reduction. Temperature distribution rises for radiation and the thermal Biot number. A higher solutal Biot number intensifies the concentration. The entropy rate for radiation and diffusion variables is enhanced.

19.
Nanoscale Adv ; 5(18): 4819-4832, 2023 Sep 12.
Artigo em Inglês | MEDLINE | ID: mdl-37705803

RESUMO

Here, the hydromagnetic entropy optimized flow of a hybrid (Pb + Fe2O3/C2H6O2) nanoliquid by a curved stretchable surface is addressed. The Darcy-Forchheimer model is utilized for porous space. Lead (Pb) and ferric oxide (Fe2O3) are considered the nanoparticles and ethylene glycol (C2H6O2) as the base liquid. Thermal expression consists of dissipation and ohmic heating. Entropy generation is under consideration. The Cattaneo-Christov heat flux impact is discussed. Non-dimensional partial expressions by adequate transformations have been reduced to ordinary differential systems. The ND-solve technique is implemented for numerical solutions of dimensionless systems. Graphical illustrations of velocity, thermal field and entropy against influential variables for both nanoliquid (Pb/C2H6O2) and hybrid nanoliquid (Pb + Fe2O3/C2H6O2) are presented. Graphical illustrations of velocity, thermal field and entropy against sundry variables for both nanoliquid (Pb/C2H6O2) and hybrid nanoliquid (Pb + Fe2O3/C2H6O2) are presented. Influences of sundry variables on the Nusselt number and drag force for both nanoliquid (Pb/C2H6O2) and hybrid nanoliquid (Pb + Fe2O3/C2H6O2) are examined. A higher thermal relaxation time tends to intensify the heat transport rate and temperature. An increment in the magnetic variable leads to an enhancement of the entropy and thermal field. An improvement in liquid flow is seen for volume fraction variables. Velocity against the porosity variable and Forchheimer number is reduced. The Brinkman number leads to maximization of entropy generation.

20.
BMC Cardiovasc Disord ; 23(1): 406, 2023 08 18.
Artigo em Inglês | MEDLINE | ID: mdl-37596526

RESUMO

BACKGROUND: Acute hyperglycemia is considered an independent prognosticator of both in-hospital and long-term outcomes in patients with acute coronary syndrome (ACS). This study aimed To analyze the incidence of acute hyperglycemia and its impact on the adverse in-hospital outcome in patients with STE-ACS undergoing primary percutaneous coronary intervention (PCI). METHODS: In this study, we enrolled patients presenting with STE-ACS and undergoing primary PCI at a tertiary care cardiac center. Acute hyperglycemia was defined as random plasma glucose (RBS) > 200 mg/dl at the time of presentation to the emergency room. RESULTS: Of the 4470 patients, 78.8% were males, and the mean age was 55.52 ± 11 years. In total, 39.4% (1759) were found to have acute hyperglycemia, and of these, 59% (1037) were already diagnosed with diabetes. Patients with acute hyperglycemia were observed to have a higher incidence of heart failure (8.2% vs. 5.5%; p < 0.001), contrast-induced nephropathy (10.9% vs. 7.4%; p < 0.001), and in-hospital mortality (5.7% vs. 2.5%; p < 0.001). On multivariable analysis, acute hyperglycemia was found to be an independent predictor of mortality with an adjusted odds ratio of 1.81 [1.28-2.55]. Multi-vessel disease (1.73 [1.17-2.56]), pre-procedure left ventricular end-diastolic pressure (LVEDP) (1.02 [1.0-1.03]), and Killip class III/IV (4.55 [3.09-6.71]) were found to be the additional independent predictors of in-hospital mortality. CONCLUSIONS: Acute hyperglycemia, regardless of diabetic status, is an independent predictor of in-hospital mortality among patients with STE-ACS undergoing primary PCI. Acute hyperglycemia, along with other significant predictors such as multi-vessel involvement, LVEDP, and Killip class III/IV, can be considered for the risk stratification of these patients.


Assuntos
Síndrome Coronariana Aguda , Hiperglicemia , Intervenção Coronária Percutânea , Adulto , Idoso , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Síndrome Coronariana Aguda/diagnóstico por imagem , Síndrome Coronariana Aguda/terapia , Coração , Hiperglicemia/diagnóstico , Hiperglicemia/epidemiologia , Intervenção Coronária Percutânea/efeitos adversos , Centros de Atenção Terciária
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