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1.
Ann Med Surg (Lond) ; 86(7): 3909-3916, 2024 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-38989199

RESUMEN

Introduction: Chronic kidney disease (CKD) is a major health concern in Saudi Arabia. The prevalence of CKD and associated risk factors in Saudi Arabia's general population are not efficiently studied. The goal of this research is to determine the prevalence rate of CKD in the ASIR region and its associated epidemiological risk factors. Methodology: This is a cross-sectional study that used a comprehensive direct questionnaire to collect data on CKD prevalence and risk factors in the ASIR region of Saudi Arabia. The study was carried out in different age groups. Demographic characteristics, presence of CKD, and associated factors such as a history of acute kidney disease, obstructive sleep apnoea, family history, history of non-steroid anti-inflammatory drugs (NSAID), smoking status, comorbidities, and history of periodontal diseases were asked. The survey tool was validated through a pilot study, and a statistical p value of 0.05 was considered significant. Results: A total of 967 participants were included in the study, with a CKD prevalence rate of 1.9%. Sex, history of acute kidney disease, obstructive sleep apnoea, family history of kidney disease, smoking, diabetes, peptic ulcer disease, hypertension and hyperlipidemia were commonly found to be associated with CKD. A binary logistic regression model was carried out to assess the risk factors for CKD. Sex, history of acute kidney disease, family history of kidney disease, obstructive sleep apnoea, smoking status, peptic ulcer, diabetes, hypertension, hyperlipidemia, hypertension and diabetes, two or more comorbidities and NSAID use had an increased risk of CKD. Conclusion: Sex, history of acute kidney disease, obstructive sleep apnoea, family history, smoking, diabetes, hypertension, peptic ulcer, hyperlipidemia, multi-comorbidity, and use of NSAIDs are all associated with an increased risk of CKD. The prevalence of CKD in this study is comparatively lower when compared to other regions in Saudi Arabia.

3.
Biomedicines ; 12(6)2024 Jun 18.
Artículo en Inglés | MEDLINE | ID: mdl-38927560

RESUMEN

Apigenin is a powerful flavone compound found in numerous fruits and vegetables, and it offers numerous health-promoting benefits. Many studies have evidenced that this compound has a potential role as an anti-inflammatory and antioxidant compound, making it a promising candidate for reducing the risk of pathogenesis. It has also been found to positively affect various systems in the body, such as the respiratory, digestive, immune, and reproductive systems. Apigenin is effective in treating liver, lung, heart, kidney, neurological diseases, diabetes, and maintaining good oral and skin health. Multiple studies have reported that this compound is capable of suppressing various types of cancer through the induction of apoptosis and cell-cycle arrest, suppressing cell migration and invasion, reduction of inflammation, and inhibiting angiogenesis. When used in combination with other drugs, apigenin increases their efficacy, reduces the risk of side effects, and improves the response to chemotherapy. This review broadly analyzes apigenin's potential in disease management by modulating various biological activities. In addition, this review also described apigenin's interaction with other compounds or drugs and the potential role of nanoformulation in different pathogeneses. Further extensive research is needed to explore the mechanism of action, safety, and efficacy of this compound in disease prevention and treatment.

4.
Int J Nanomedicine ; 19: 5335-5363, 2024.
Artículo en Inglés | MEDLINE | ID: mdl-38859956

RESUMEN

The genome editing approach by clustered regularly interspaced short palindromic repeats (CRISPR)/associated protein 9 (CRISPR/Cas9) is a revolutionary advancement in genetic engineering. Owing to its simple design and powerful genome-editing capability, it offers a promising strategy for the treatment of different infectious, metabolic, and genetic diseases. The crystal structure of Streptococcus pyogenes Cas9 (SpCas9) in complex with sgRNA and its target DNA at 2.5 Å resolution reveals a groove accommodating sgRNA:DNA heteroduplex within a bilobate architecture with target recognition (REC) and nuclease (NUC) domains. The presence of a PAM is significantly required for target recognition, R-loop formation, and strand scission. Recently, the spatiotemporal control of CRISPR/Cas9 genome editing has been considerably improved by genetic, chemical, and physical regulatory strategies. The use of genetic modifiers anti-CRISPR proteins, cell-specific promoters, and histone acetyl transferases has uplifted the application of CRISPR/Cas9 as a future-generation genome editing tool. In addition, interventions by chemical control, small-molecule activators, oligonucleotide conjugates and bioresponsive delivery carriers have improved its application in other areas of biological fields. Furthermore, the intermediation of physical control by using heat-, light-, magnetism-, and ultrasound-responsive elements attached to this molecular tool has revolutionized genome editing further. These strategies significantly reduce CRISPR/Cas9's undesirable off-target effects. However, other undesirable effects still offer some challenges for comprehensive clinical translation using this genome-editing approach. In this review, we summarize recent advances in CRISPR/Cas9 structure, mechanistic action, and the role of small-molecule activators, inhibitors, promoters, and physical approaches. Finally, off-target measurement approaches, challenges, future prospects, and clinical applications are discussed.


Asunto(s)
Sistemas CRISPR-Cas , Edición Génica , Edición Génica/métodos , Humanos , Animales , Streptococcus pyogenes/genética , Proteína 9 Asociada a CRISPR/genética , Proteína 9 Asociada a CRISPR/química
5.
Biomolecules ; 14(6)2024 Jun 14.
Artículo en Inglés | MEDLINE | ID: mdl-38927099

RESUMEN

The antioxidant defense mechanisms play a critical role in mitigating the deleterious effects of reactive oxygen species (ROS). Catalase stands out as a paramount enzymatic antioxidant. It efficiently catalyzes the decomposition of hydrogen peroxide (H2O2) into water and oxygen, a potentially harmful byproduct of cellular metabolism. This reaction detoxifies H2O2 and prevents oxidative damage. Catalase has been extensively studied as a therapeutic antioxidant. Its applications range from direct supplementation in conditions characterized by oxidative stress to gene therapy approaches to enhance endogenous catalase activity. The enzyme's stability, bioavailability, and the specificity of its delivery to target tissues are significant hurdles. Furthermore, studies employing conventional catalase formulations often face issues related to enzyme purity, activity, and longevity in the biological milieu. Addressing these challenges necessitates rigorous scientific inquiry and well-designed clinical trials. Such trials must be underpinned by sound experimental designs, incorporating advanced catalase formulations or novel delivery systems that can overcome existing limitations. Enhancing catalase's stability, specificity, and longevity in vivo could unlock its full therapeutic potential. It is necessary to understand the role of catalase in disease-specific contexts, paving the way for precision antioxidant therapy that could significantly impact the treatment of diseases associated with oxidative stress.


Asunto(s)
Antioxidantes , Catalasa , Estrés Oxidativo , Catalasa/metabolismo , Catalasa/química , Humanos , Estrés Oxidativo/efectos de los fármacos , Animales , Antioxidantes/metabolismo , Especies Reactivas de Oxígeno/metabolismo , Peróxido de Hidrógeno/metabolismo , Terapia Genética/métodos
6.
Ann Med Surg (Lond) ; 86(5): 3146-3153, 2024 May.
Artículo en Inglés | MEDLINE | ID: mdl-38694303

RESUMEN

Introduction: Portal vein thrombosis (PVT) is a rare medical condition that obstructs blood flow in the portal vein, with cirrhosis as a common predisposing factor. However, its association with oral contraceptive pills (OCPs), particularly with progestins, remains inadequately explored. This case report aims to contribute to this understanding, focusing on the rare presentation of PVT-induced intestinal obstruction in a female on prolonged OCP therapy. Case presentation: A 45-year-old female presented with severe abdominal pain, vomiting, and constipation. Diagnosis revealed PVT-induced intestinal obstruction, an exceptionally rare occurrence in the context of prolonged OCP therapy. The patient's symptoms improved with conservative management, including rivaroxaban, highlighting the crucial role of early intervention. Discussion: This case brings attention to the limited literature exploring the link between OCPs and PVT. Despite the generally safe reputation of OCPs, they can induce pro-thrombotic conditions, emphasizing the need for heightened clinical awareness. In this case, the rarity of intestinal obstruction in PVT, compounded by the absence of common risk factors, underscores the diagnostic challenges associated with such presentations. Conclusion: PVT-induced intestinal obstruction in a patient on prolonged OCP therapy is exceptionally rare, emphasizing the necessity for multidisciplinary management. It provides crucial insights into suspecting, identifying, and treating this uncommon complication in non-cirrhotic individuals, contributing to the limited existing literature on the subject.

7.
Front Nutr ; 11: 1324793, 2024.
Artículo en Inglés | MEDLINE | ID: mdl-38633603

RESUMEN

Dietary fiber has an immense role in the gut microbiome by modulating juvenile growth, immune system maturation, glucose, and lipid metabolism. Lifestyle changes might disrupt gut microbiota symbiosis, leading to various chronic diseases with underlying inflammatory conditions, obesity, and its associated pathologies. An interventional study of 16 weeks examined the impact of psyllium husk fiber with and without lifestyle modification on gut health and sleep quality in people with central obesity (men = 60 and women = 60), those aged from 40 to 60 years, those having WC ≥ 90 cm (men) and WC ≥ 80 cm (women), and no history of any chronic disease or regular medication. The participants were subgrouped into three intervention groups, namely, the psyllium husk fiber (PSH) group, the lifestyle modification (LSM) group, and the LSM&PSH group and control group with equal gender bifurcation (men = 15 and women = 15). A 24-h dietary recall, gastrointestinal tract (GIT) symptoms, and sleep quality analysis data were collected on validated questionnaires. The analyses of variance and covariance were used for baseline and post-intervention, respectively. Student's t-test was applied for pre- and post-intervention changes on the variable of interest. The intervention effect on GIT health was highly significant (P < 0.001). The mean GIT scores of the LSM, PSH, and LSM&PSH groups were 2.99 ± 0.14, 2.49 ± 0.14, and 2.71 ± 0.14, respectively, compared to the mean GIT scores of the control group. No significant (P = 0.205) effect of either intervention was observed on sleep quality. The study concluded that psyllium husk fiber significantly improved the GIT symptoms, while no significant effect of the intervention was observed on sleep quality analysis.

9.
Molecules ; 29(5)2024 Feb 29.
Artículo en Inglés | MEDLINE | ID: mdl-38474604

RESUMEN

Luteolin, a flavonoid, is mainly found in various vegetables and fruits, including carrots, cabbages, onions, parsley, apples, broccoli, and peppers. Extensive research in vivo and in vitro has been performed to explore its role in disease prevention and treatment. Moreover, this compound possesses the ability to combat cancer by modulating cell-signaling pathways across various types of cancer. The studies have confirmed that luteolin can inhibit cancer-cell survival and proliferation, angiogenesis, invasion, metastasis, mTOR/PI3K/Akt, STAT3, Wnt/ß-catenin, and cell-cycle arrest, and induce apoptosis. Further, scientific evidence describes that this compound plays a vital role in the up/down-regulation of microRNAs (miRNAs) in cancer therapy. This review aims to outline the anti-cancer mechanisms of this compound and its molecular targets. However, a knowledge gap remains regarding the studies on its safety and efficacy and clinical trials. Therefore, it is essential to conduct more research based on safety, efficacy, and clinical trials to explore the beneficial role of this compound in disease management, including cancer.


Asunto(s)
Luteolina , Neoplasias , Humanos , Luteolina/farmacología , Flavonoides/farmacología , Fosfatidilinositol 3-Quinasas/metabolismo , Transducción de Señal , Neoplasias/tratamiento farmacológico , Inflamación/tratamiento farmacológico , Apoptosis , Proliferación Celular , Línea Celular Tumoral , Proteínas Proto-Oncogénicas c-akt/metabolismo
10.
Nat Med ; 30(4): 1023-1034, 2024 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-38504015

RESUMEN

Gastroesophageal cancer dynamics and drivers of clinical responses with immune checkpoint inhibitors (ICI) remain poorly understood. Potential synergistic activity of dual programmed cell death protein 1 (PD-1) and lymphocyte-activation gene 3 (LAG-3) inhibition may help improve immunotherapy responses for these tumors. We report a phase Ib trial that evaluated neoadjuvant nivolumab (Arm A, n = 16) or nivolumab-relatlimab (Arm B, n = 16) in combination with chemoradiotherapy in 32 patients with resectable stage II/stage III gastroesophageal cancer together with an in-depth evaluation of pathological, molecular and functional immune responses. Primary endpoint was safety; the secondary endpoint was feasibility; exploratory endpoints included pathological complete (pCR) and major pathological response (MPR), recurrence-free survival (RFS) and overall survival (OS). The study met its primary safety endpoint in Arm A, although Arm B required modification to mitigate toxicity. pCR and MPR rates were 40% and 53.5% for Arm A and 21.4% and 57.1% for Arm B. Most common adverse events were fatigue, nausea, thrombocytopenia and dermatitis. Overall, 2-year RFS and OS rates were 72.5% and 82.6%, respectively. Higher baseline programmed cell death ligand 1 (PD-L1) and LAG-3 expression were associated with deeper pathological responses. Exploratory analyses of circulating tumor DNA (ctDNA) showed that patients with undetectable ctDNA post-ICI induction, preoperatively and postoperatively had a significantly longer RFS and OS; ctDNA clearance was reflective of neoantigen-specific T cell responses. Our findings provide insights into the safety profile of combined PD-1 and LAG-3 blockade in gastroesophageal cancer and highlight the potential of ctDNA analysis to dynamically assess systemic tumor burden during neoadjuvant ICI that may open a therapeutic window for future intervention. ClinicalTrials.gov registration: NCT03044613 .


Asunto(s)
Anticuerpos Monoclonales Humanizados , Neoplasias Esofágicas , Neoplasias Gástricas , Humanos , Nivolumab/uso terapéutico , Receptor de Muerte Celular Programada 1 , Terapia Neoadyuvante , Neoplasias Esofágicas/tratamiento farmacológico , Neoplasias Esofágicas/genética , Unión Esofagogástrica , Protocolos de Quimioterapia Combinada Antineoplásica/efectos adversos
11.
Environ Sci Pollut Res Int ; 31(7): 10661-10672, 2024 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-38200195

RESUMEN

This study focuses on the removal of heavy metal ions, such as cadmium (Cd2+), lead (Pb2+), chromium (Cr6+), and zinc (Zn2+) from water. Metals, which are often present in water, can have various origins, i.e., industrial emissions, mining, melting, corrosion, municipal, industrial waste, and agrochemicals. These metals have the potential to cause adverse effects on human health. The study employed activated carbon derived from date palm waste as a means of removing heavy metals. The activated nanoparticles were characterized using various analytical techniques, including SEM, ICP, XRD, BET, Raman, and FTIR analysis. Batch studies were conducted to optimize the metal ion adsorption onto the activated carbon of date palm waste. The adsorption process was evaluated using isotherm models and reaction kinetics under various conditions, including contact time, dosage, pH, and initial concentration. The findings of this study revealed that the prepared activated carbon from date palm waste effectively removed up to 85% of Cr6+, Pb2+, Cd2+, and Zn2+ ions from water. This study highlights the potential of using agricultural waste, to produce effective adsorbents for heavy metal removal.


Asunto(s)
Metales Pesados , Phoeniceae , Contaminantes Químicos del Agua , Humanos , Cadmio/análisis , Carbón Orgánico/química , Plomo , Metales Pesados/análisis , Adsorción , Agua/química , Iones , Contaminantes Químicos del Agua/análisis , Concentración de Iones de Hidrógeno , Cinética
12.
Cureus ; 15(12): e50010, 2023 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-38077669

RESUMEN

Background The spleen is one of the most common solid organs injured in blunt abdominal trauma with significant mortality. The management of splenic injury has significantly changed over the last few decades, ranging from certain splenectomies to non-operative management (NOM). Although several retrospective studies have been published on the NOM of minor spleen injuries, few studies have analyzed the results of NOM for high-grade splenic injuries. The pertinent question that we attempt to answer is, "Is it possible to manage extensive splenic injuries non-operatively?". Objectives To study the feasibility of NOM for the American Association for the Surgery of Trauma (AAST) Grade 3, 4, and 5 splenic injuries and to assess the demographic profile and cases for AAST Grade 3, 4, and 5 splenic injuries. Methods and methodology We, retrospectively, studied patients admitted with AAST Grade 3, 4, and 5 splenic injuries from blunt abdominal trauma admitted at the Government Medical College, Thiruvananthapuram, India, between January 2014 and October 2020. Their demographics, grade of splenic injuries, associated injuries, and methods of management were collected, and statistical analysis was done. Results The study included 132 patients with AAST Grade 3, 4, and 5 splenic injuries. Fifty percent of patients had Grade 3 injuries, 39.4% had Grade 4 injuries, and 10.6% were found to have Grade 5 splenic injuries. Grade 3 and 4 injuries were mainly managed non-operatively, while Grade 5 injuries had a failure rate of nearly 65% when managed non-operatively. Additionally, 73.5% of splenic injuries were successfully managed non-operatively. A significant association was noted between the severity of injuries and the need for operative management (p<0.001). Meanwhile, 64.29% of the patients with Grade 5 splenic injuries ended up needing operative management, as opposed to 34.62% in Grade 4 and 12.12% in Grade 3 splenic injuries. Conclusion We suggest that NOM may be undertaken successfully in appropriately designed areas with close observation for hemodynamically stable patients with extra vigilance in the case of the elderly and those with associated injuries. There should be a low threshold for switching to operative management, especially in Grade 5 injuries.

13.
Biomedicines ; 11(12)2023 Dec 01.
Artículo en Inglés | MEDLINE | ID: mdl-38137424

RESUMEN

Cancer is a major public health concern worldwide in terms of mortality. The exact reason behind the development of cancer is not understood clearly, but it is evidenced that alcohol consumption, radiation, and exposure to chemicals are main players in this pathogenesis. The current mode of treatments such as surgery, chemotherapy, and radiotherapy are effective, but, still, cancer is a major problem leading to death and other side effects. However, safer and effective treatment modules are needed to overcome the adverse effects of current treatment modules. In this regard, natural compounds have been recognized to ameliorate diseases by exerting anti-inflammatory, anti-oxidative, and anti-tumor potential through several mechanisms. Mangiferin, a xanthone C-glucoside, is found in several plant species including Mangifera indica (mango), and its role in disease prevention has been confirmed through its antioxidant and anti-inflammatory properties. Furthermore, its anti-cancer-potential mechanism has been designated through modulation of cell signaling pathways such as inflammation, angiogenesis, PI3K/AKT, apoptosis, and cell cycle. This article extensively reviews the anticancer potential of mangiferin in different cancers through the modulation of cell signaling pathways. Moreover, the synergistic effects of this compound with some commonly used anti-cancer drugs against different cancer cells are discussed. More clinical trials should be performed to reconnoiter the anti-cancer potential of this compound in human cancer treatment. Further, understanding of mechanisms of action and the safety level of this compound can help to manage diseases, including cancer.

14.
J Pak Med Assoc ; 73(11): 2200-2204, 2023 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-38013528

RESUMEN

OBJECTIVE: To assess the tear film parameters in breastfeeding women. satisfaction. Methods: The observational study was conducted at the College of Applied Medical Sciences, Riyadh, Saudi Arabia, from December 15, 2021, to February 12, 2022, and comprised healthy women aged 18-40 years who had no ocular diseases. Breastfeeding women were in group A and non-breastfeeding women formed the control group B. Ocular surface disease index, phenol red thread, and tear ferning tests were used in that order to assess the tear film for all the subjects. A gap of 5 minutes was allowed between phenol red thread and tear ferning tests. Data was analysed using SPSS, version 22. RESULTS: Of the 50 subjects, 25(50%) were in group A with mean age 30.4±5.9 years having a mean breastfeeding period of 5.4±5.0 months. The remaining 25(50%) women were in group B with mean age 28.5±2.1 years. Significant differences were found between the groups for ocular surface disease index, phenol red thread, and tear ferning (p<0.05). Significant moderate correlation was found between tear ferning grades and breastfeeding duration (p<0.05). Conclusion: Breastfeeding was found to increase dry eye symptoms in women.


Asunto(s)
Síndromes de Ojo Seco , Laceraciones , Humanos , Femenino , Adulto Joven , Adulto , Masculino , Lactancia Materna , Fenolsulfonftaleína , Síndromes de Ojo Seco/epidemiología , Lágrimas
15.
Int J Nanomedicine ; 18: 5531-5559, 2023.
Artículo en Inglés | MEDLINE | ID: mdl-37795042

RESUMEN

The recent developments in the study of clustered regularly interspaced short palindromic repeats/associated protein 9 (CRISPR/Cas9) system have revolutionized the art of genome-editing and its applications for cellular differentiation and immune response behavior. This technology has further helped in understanding the mysteries of cancer progression and possible designing of novel antitumor immunotherapies. CRISPR/Cas9-based genome-editing is now often used to engineer universal T-cells, equipped with recombinant T-cell receptor (TCR) or chimeric antigen receptor (CAR). In addition, this technology is used in cytokine stimulation, antibody designing, natural killer (NK) cell transfer, and to overcome immune checkpoints. The innovative potential of CRISPR/Cas9 in preparing the building blocks of adoptive cell transfer (ACT) immunotherapy has opened a new window of antitumor immunotherapy and some of them have gained FDA approval. The manipulation of immunogenetic regulators has opened a new interface for designing, implementation and interpretation of CRISPR/Cas9-based screening in immuno-oncology. Several cancers like lymphoma, melanoma, lung, and liver malignancies have been treated with this strategy, once thought to be impossible. The safe and efficient delivery of CRISPR/Cas9 system within the immune cells for the genome-editing strategy is a challenging task which needs to be sorted out for efficient immunotherapy. Several targeting approaches like virus-mediated, electroporation, microinjection and nanoformulation-based methods have been used, but each procedure offers some limitations. Here, we elaborate the recent updates of cancer management through immunotherapy in partnership with CRISPR/Cas9 technology. Further, some innovative methods of targeting this genome-editing system within the immune system cells for reprogramming them, as a novel strategy of anticancer immunotherapy is elaborated. In addition, future prospects and clinical trials are also discussed.


Asunto(s)
Sistemas CRISPR-Cas , Neoplasias , Humanos , Sistemas CRISPR-Cas/genética , Edición Génica/métodos , Inmunoterapia Adoptiva , Linfocitos T , Neoplasias/genética , Neoplasias/terapia
16.
World J Surg ; 47(11): 2718-2723, 2023 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-37713128

RESUMEN

BACKGROUND: The anatomy of the transversus abdominis muscle and its aponeurosis is important in transversus abdominis release surgery. We studied the CT anatomy of the transversus abdominis muscle medial to the linea semilunaris at different levels in the abdomen and measured the thickness of this muscle. METHODS: In this retrospective study, we analysed 150 abdominal computed tomography at L1, L3, and L5 vertebral levels corresponding to subxiphoid, umbilical, and suprapubic regions, respectively. The patients were divided into three groups based on age and sex: women aged 15-20 years (nulliparous), women aged 30-60 years (multiparous), and men aged 15-60 years, with each group having 50 patients. We compared the thickness of the TA muscle at the L1 level between men and women and between nulliparous and multiparous women. RESULTS: Transversus abdominis muscle was consistently present medial to the linea semilunaris at L1 vertebral level in the subxiphoid region (150/150). At the L3 vertebral level in the mid-abdomen, only eight patients had the transversus abdominis muscle there (8/150, 5%). At the L5 vertebral level in the suprapubic region, no patient had the transversus abdominis muscle medial to the linea semilunaris. The mean thickness of the transversus abdominis muscle at the L1 level was 3.4 mm, and at the L3 level, it was 1.6 mm. There was no statistically significant difference in the transversus abdominis muscle thickness between the men and women; however, a significant difference was found between the nulliparous and multiparous women, with thinner TA muscle in later. CONCLUSION: There is good transversus abdominis muscle bulk medial to the linea semilunaris for doing transversus abdominis muscle division in the upper abdomen. However, as we move towards the mid-abdomen, we have TA aponeurosis or rarely TA muscle of little bulk.


Asunto(s)
Cavidad Abdominal , Pared Abdominal , Masculino , Humanos , Femenino , Estudios Retrospectivos , Músculos Abdominales/diagnóstico por imagen , Músculos Abdominales/cirugía , Pared Abdominal/cirugía , Tomografía Computarizada por Rayos X
17.
RSC Adv ; 13(37): 26134-26143, 2023 Aug 29.
Artículo en Inglés | MEDLINE | ID: mdl-37664211

RESUMEN

We investigated the physical behavior of SrMO3 (M = Hf and Pt) compounds, which are strontium-based oxide perovskites. We utilized the WIEN2k software to simulate and investigate their physical properties. The structural stability of SrHfO3 and SrPtO3 was verified using the Birch-Murnaghan equation of states for optimization. We also checked the elastic stability through the computation of elastic constants using the IRelast software. Our results indicate the stability of these compounds and showed their anisotropic, ductility, scratch-resistive, and plastic strain-resistant characteristics. Using the TB-mBJ potential approach, we determined that SrHfO3 is an insulator, whereas SrPtO3 is a metal in nature. The density of states computations was used to find the band structure as well as the contribution of different electronic states. Optical property research was conducted using the band gap energies of these substances. Our findings suggest that these crystals have low energy absorption and reflectivity of up to 65%, making them suitable for use in high-frequency UV devices. Specifically, SrHfO3 is more transparent before the energy point 2.80 eV, while the compound SrPtO3 after 6.50 eV to 12.0 eV and SrHfO3 from 12.0 and 14.0 eV. This study represents the first DFT-based investigation of these discussed crystals according to the best of our knowledge.

19.
Heliyon ; 9(8): e18672, 2023 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-37576213

RESUMEN

This work reported to investigate convective flow of non-Newtonian fluid effect on an exponentially stretchable surface. Effect of nanoparticle is considered in heat and mass equation. The transformation technique utilized on dimensionless equations is converted to non-dimensionless equations are solved thought numerical approach Bvp4c. Influence of approatiate analysis of velocities, heat and mass transport are scrutinized through figures. Furthermore, the comparative analysis of drag forces, Nusselt number and Sherwood number are evaluated over and done with tabulated values. It is give details that the temperature field strengthens with intensification in thermophoresis and random diffusions. Similarly, rises in thermophoresis effect parameter both temperature and concentration profile increasing.

20.
Surg Open Sci ; 14: 96-102, 2023 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-37577253

RESUMEN

Background: Acute Appendicitis (AA) is the most common abdominal surgical emergency. It requires proper management to decrease mortality and morbidity. Clinical scoring systems for diagnosing AA aimed to decrease the use of radiological scans and the rate of negative appendectomies (NA). We aim to assess the adult appendicitis score (AAS) in the diagnosis prediction of AA. Method: A retrospective study with 1303 cases of AA is performed. We compared the correlation of AAS and Alvarado scores to postoperative histopathology. Specificity, sensitivity, Positive Predictive Value (PPV), and Negative Predictive Value (NPV) were assessed. ROC was used. Results: AAS risk stratification was applied to the study population. Group I for a low probability, and groups II and III for an intermediate and high probability of AA. We found that 159 patients were matched in group I, 505, and 639 were in groups II and III of AAS, respectively. The correlation between Alvarado and AAS with HP was significant. AAS ≥ 16 presented sensitivity and specificity of 50 % and 75.47 %, respectively, with PPV of 97.96 % and NPV of 6.02 %, with an accuracy of 51.04 %. Regarding AAS ≥ 11, the sensitivity was 88.96 %, specificity was 39.62 %, PPV was 97.2 %, NPV was 13.21 %, and accuracy was 86.95 %. Conclusion: AAS is relatively more accurate than Alvarado's score, especially in selecting a safe candidate for discharge from an emergency. In addition, AAS is found to decrease the need for radiological images and NA rate more than Alvarado.

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