52,798 results match your criteria stress values

Direct Synthesis of Functional Thermoplastic Elastomer with Excellent Mechanical Properties by Scandium-Catalyzed Copolymerization of Ethylene and Fluorostyrenes.

Angew Chem Int Ed Engl 2021 Sep 24. Epub 2021 Sep 24.

Chinese Academy of Sciences, State Key Laboratory of Polymer Physics and Chemistry, Renmin Street 5625, 130022, Changchun, CHINA.

Synthesis of thermoplastic elastomers (TPEs) from ethylene and functionalized comonomers is of theoretical interest and practical importance. Herein, we report copolymerizations of ethylene (E) and ortho- / meta- / para- fluorostyrenes (S F = o FS/ m FS/ p FS) by using quinolyl methylene fluorenyl scandium complex (Flu-CH 2 -Qu)Sc(CH 2 SiMe 3 ) 2 . The copolymerizations proceed in a controlled fashion to afford copolymers composed of "soft" ethylene-fluorostyurene (E-S F ) random segments ( T g = -22. Read More

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September 2021

Cryopreserved Alginate-Encapsulated Islets Can Restore Euglycemia in a Diabetic Animal Model Better than Cryopreserved Non-encapsulated Islets.

Cell Med 2019 13;11:2155179019876641. Epub 2019 Sep 13.

Department of Surgery, University of California Irvine, Orange, CA, USA.

Islet transplantation has been shown to restore normoglycemia clinically. One of the current limitations to the widespread clinical use of islet transplantation is culturing and preserving more than 1 million islet equivalents in preparation for transplant. One possible solution is to bank frozen islets and use them when needed. Read More

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September 2019

Blood analysis of laboratory used for neuroscience research: Investigation of long-term and cumulative effects of implants, fluid control, and laboratory procedures.

eNeuro 2021 Sep 23. Epub 2021 Sep 23.

Brain Research Institute, Center for Cognitive Science, University of Bremen, 28334 Bremen, Germany.

The non-human primate (NHP) constitutes an extraordinarily important model in neuroscience research for understanding the neuronal underpinnings of perceptual, motor, cognitive, and executive functions of the primate brain, and to study the physiological causes, effects, and potential treatments of brain disorders. Due to their cognitive capabilities, NHPs receive special attention in Animal Welfare Regulations around the world, and their well-being is a benchmark for the evaluation, monitoring, and refinement of experimental procedures. As a consequence, many typical neuroscientific procedures are considered only mildly severe by animal welfare boards. Read More

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September 2021

Synthesis, characterization and stress-testing of a robust quillaja saponin stabilized oil-in-water phytocannabinoid nanoemulsion.

J Cannabis Res 2021 Sep 23;3(1):43. Epub 2021 Sep 23.

Department of Chemistry and Biochemistry, University of Windsor, 401 Sunset Ave., Windsor, ON, Canada.

Background: This study describes the design, optimization, and stress-testing of a novel phytocannabinoid nanoemulsion generated using high-pressure homogenization. [Formula: see text], a plant-derived commercial emulsifier containing quillaja saponin, was used to stabilize the lipid phase droplets in water. Stress-testing was performed on this nanoemulsion in order to evaluate its chemical and colloidal stability under the influence of different environmental factors, encompassing both physical and chemical stressors. Read More

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September 2021

Resting echocardiographic predictors for true-severe aortic stenosis in patients with low-gradient severe aortic stenosis: A dobutamine stress echocardiography study.

Echocardiography 2021 Sep 23. Epub 2021 Sep 23.

Department of Cardiology, New Tokyo Hospital, Chiba, Japan.

Objective: Dobutamine stress echocardiography (DSE) is not always feasible in patients with low-gradient severe aortic stenosis (LG-SAS), and there are limited data available on the resting echocardiographic predictors for true-severe aortic stenosis (TSAS). This study investigated resting echocardiographic predictors for TSAS.

Methods: Clinical data of 106 LG-SAS patients who underwent DSE were retrospectively analyzed. Read More

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September 2021

Association analysis and evaluation of genetic diversity in wheat genotypes using SSR markers.

Biol Futur 2021 Jun 10. Epub 2021 Jun 10.

Department of Plant Breeding, Arak Branch, Islamic Azad University, Arak, Iran.

A population of 105 wheat genotypes (including 94 hexaploid and 11 tetraploid genotypes) was used to determine genetic diversity. Samples were grown based on the randomized complete block design with three replications under salinity stress (120 mM NaCl (and control (10 mM NaCl (conditions. Morpho-physiological traits associated with tolerance of salinity at the seedling stage were recorded. Read More

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Temporal variations in glucose level, oxidative stress and antioxidant profile of Koi carps (Cyprinus carpio var koi) in response to hypoxic tolerance.

Proteek Dasgupta

Biol Futur 2021 Feb 2. Epub 2021 Feb 2.

Department of Zoology, Bangalore University, Jnana Bharathi Campus, Bengaluru, 560056, India.

Biochemical analyses were conducted temporally to understand the impact of prolonged hypoxic environment on gill and white muscle of juvenile Koi carps (Cyprinus carpio var koi). The 16-day study involved quantification of Glucose (GLU), oxidative stress (Lipid Peroxidation-LPO) and antioxidant profile (Catalase-CAT, Glutathione-GSH, Glutathione-S-Transferase-GST) every 96th hour to understand the physiological consequences of hypoxic environment compared to normoxia (Control). There was no mortality throughout the study period, however, fishes were physically exhausted and exhibited Aquatic Surface Respiration (ASR) after day 8. Read More

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February 2021

Cysteine-induced alterations in physicochemical parameters of oat (Avena sativa L. var. Scott and F-411) under drought stress.

Biol Futur 2019 Jan 16;70(1):16-24. Epub 2019 Nov 16.

Department of Botany, Government College University, Faisalabad, Pakistan.

Introduction: Drought is one of the major abiotic stresses that drastically reduces crop yield throughout the world. Being precursor of glutathione biosynthesis and involvement in other metabolic processes, cysteine (Cys) has been shown to alter growth and development in plants. In this context, we investigated Cys-induced physicochemical alterations in oat (Avena sativa L. Read More

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January 2019

Serum apelin-13 levels and total oxidant/antioxidant status of patients with Alzheimer's disease.

Aging Med (Milton) 2021 Sep 22;4(3):201-205. Epub 2021 Aug 22.

Department of Neurology Medical Park Hospital Istanbul Turkey.

Objective: We aimed to evaluate apelin-13 levels, total oxidant/antioxidant status in Alzheimer's disease (AD) and to investigate the relationship between these parameters.

Methods: Patients newly diagnosed with AD were enrolled in the study. The control group consisted of age- and gender-matched healthy individuals. Read More

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September 2021

Cacao ( L.) Response to Water Stress: Physiological Characterization and Antioxidant Gene Expression Profiling in Commercial Clones.

Front Plant Sci 2021 6;12:700855. Epub 2021 Sep 6.

Plant and Crop Biology, Department of Biology, Pontificia Universidad Javeriana, Bogotá, Colombia.

The increase in events associated with drought constraints plant growth and crop performance. Cacao ( L.) is sensitive to water deficit stress (DS), which limits productivity. Read More

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September 2021

Comparison of Newtonian and Non-newtonian Fluid Models in Blood Flow Simulation in Patients With Intracranial Arterial Stenosis.

Front Physiol 2021 6;12:718540. Epub 2021 Sep 6.

Department of Medicine and Therapeutics, The Chinese University of Hong Kong, Hong Kong, China.

Background: Newtonian fluid model has been commonly applied in simulating cerebral blood flow in intracranial atherosclerotic stenosis (ICAS) cases using computational fluid dynamics (CFD) modeling, while blood is a shear-thinning non-Newtonian fluid. We aimed to investigate the differences of cerebral hemodynamic metrics quantified in CFD models built with Newtonian and non-Newtonian fluid assumptions, in patients with ICAS.

Methods: We built a virtual artery model with an eccentric 75% stenosis and performed static CFD simulation. Read More

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September 2021

Hemodynamic analysis of hepatic arteries for the early evaluation of hepatic fibrosis in biliary atresia.

Comput Methods Programs Biomed 2021 Sep 19;211:106400. Epub 2021 Sep 19.

Department of Medical Imaging, Shanghai Children's Medical Center, Shanghai Jiao Tong University School of Medicine, 1678 Dongfang Road, Shanghai 200127, China. Electronic address:

Background And Objective: Hepatic fibrosis is the prominent characteristic of biliary atresia (BA), may even progress continually after Kasai procedure (KP). BA, as a devastating pediatric hepatic disease, mainly leads to newborn cholestasis, even liver cirrhosis, eventually hepatic failure. Earlier diagnosis of hepatic fibrosis, which used to be detected by liver biopsy commonly, is consistent with better outcomes of KP. Read More

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September 2021

Genomic and phenotypic analysis of heat and sanitizer resistance in from beef in relation to the locus of heat resistance.

Appl Environ Microbiol 2021 Sep 22:AEM0157421. Epub 2021 Sep 22.

Agriculture and Agri-Food Canada, 6000 C&E Trail, Lacombe, Alberta, Canada T4L 1W1.

The locus of heat resistance (LHR) can confer heat resistance to to various extents. This study investigated the phylogenetic relationships, and genomic and phenotypic characteristics of with or without LHR recovered from beef by direct plating or from enrichment broth at 42°C. LHR-positive isolates (n=24) were whole genome-sequenced by short- and long-reads. Read More

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September 2021

Rate pressure product, age predicted maximum heart rate or heart rate reserve. Which one better predicts cardiovascular events following exercise stress echocardiography?

Am J Cardiovasc Dis 2021 15;11(4):450-457. Epub 2021 Aug 15.

Cardiac Investigations Unit, Logan Hospital Meadowbrook, Yatala, Australia.

Background: Age-predicted maximum heart rate (APMHR) has been demonstrated to be a poor predictor of future cardiovascular (CV) events and is yet to be validated as a termination point during exercise testing. In contrast, maximum rate pressure product (MRPP) is recognized as a strong predictor of CV outcome with superior CV event prediction over APMHR. Heart rate reserve (HRR) has been shown to be a powerful predictor of CV mortality during exercise testing, however thus far, this is not confirmed for non-fatal CV events. Read More

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Physiological biomarkers of chronic stress: A systematic review.

Int J Health Sci (Qassim) 2021 Sep-Oct;15(5):46-59

Psychophysiology Research Lab, MAHQ Biological Research Centre, University of Karachi, Karachi, Pakistan.

Objective: The basic objective of this systematic review was to identify potential biomarkers for chronic stress.

Methods: A systematic review of studies linking biomarkers in people with chronic stress was conducted using PRISMA guidelines. The last 40 years' studies were included in the systematic review with no age restrictions; animal studies were excluded from the study. Read More

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September 2021

Assessment of the marine ecotoxic state in the Moroccan coastal area Anza-Taghazout following the installation of two wastewater treatment plants: a multibiomarker study using Mytilus galloprovincialis.

Environ Sci Pollut Res Int 2021 Sep 21. Epub 2021 Sep 21.

Department of Biology, Faculty of Sciences, Abdelmalek Essadi University, Tetouan, Morocco.

The aim of the present study is the first to evaluate the ecotoxic state of the marine environment in Anza-Taghazout coasts (Morocco) after installation of two wastewater treatment plants using a natural population of marine bivalves Mytilus galloprovincialis. These coasts are exposed to many discharges generating, thus, different sources of pollutants. These pollutants can modulate the physiological responses of marine bivalves to environmental stress. Read More

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September 2021

Anticancer Effects of Vitis vinifera L. Mediated Biosynthesized Silver Nanoparticles and Cotreatment with 5 Fluorouracil on HT-29 Cell Line.

Biol Trace Elem Res 2021 Sep 21. Epub 2021 Sep 21.

Department of Health and Biomedical Sciences, Burdur Mehmet Akif Ersoy University, Burdur, Turkey.

The aim of this study was to evaluate the anticancer effects of biosynthesized silver nanoparticles (Vv-AgNPs) from grape (Vitis vinifera L.) seed aqueous extract, alone or in combination with 5-Fluorouracil (5-FU) on HT-29 cell line. Vv-AgNPs were characterized by techniques such as UV-vis spectrophotometer (surface plasmon peak 454 nm), scanning electron microscopy (SEM), and energy-dispersive X-ray spectroscopy (EDX). Read More

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September 2021

Changes in the fatty acid composition of pine needle lipids under the aluminum smelter emissions.

Ecotoxicology 2021 Sep 21. Epub 2021 Sep 21.

Laboratory of Ecosystems Bioindication, Siberian Instititue of Plant Physiology and Biochemistry Siberian Branch of the Russian Academy of Sciences, Lermontov str., 132, 664033, Irkutsk, Russia.

Changes in the fatty acid (FA) composition of total lipids of Pinus sylvestris needles at different pollution levels caused by emissions from a large aluminum smelter (BrAS) have been studied. In the needles of trees from unpolluted (background) territories, the FA spectrum is represented by 24 acids with prevalence of unsaturated FAs (71.6%). Read More

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September 2021

Emotional Impact on Health Personnel, Medical Students, and General Population Samples During the COVID-19 Pandemic in Lima, Peru.

Rev Colomb Psiquiatr (Engl Ed) 2021 Jul-Sep;50(3):189-198

Department of Neuropsychiatry, Cayetano Heredia Hospital, San Martin de Porres, Lima, Peru.

Background: The aim of the study is to compare the emotional effects of COVID-19 among three different groups, namely: health personnel, medical students, and a sample of the general population.

Methods: 375 participants were recruited for this study, of which 125 were medical students (preclinical studies, 59; clinical studies, 66), 125 were health personnel (COVID-19 frontline personnel, 59; personnel not related with COVID-19, 66), and 125 belonged to the general population. The PHQ-9, GAD-7, and CPDI scales were used to assess the emotional impact. Read More

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December 2020

Perceived Stress by Students of the Medical Sciences in Cuba Toward the COVID-19 Pandemic: Results of an Online Survey.

Rev Colomb Psiquiatr (Engl Ed) 2021 Jul-Sep;50(3):176-183

Facultad de Ciencias Médicas Dr. Ernesto Che Guevara de la Serna, Universidad de Ciencias Médicas de Pinar del Río, Pinar del Río, Cuba.

Introduction: The aims of this study were to determine the usefulness of the Modified (10-item) Scale of Perceived Stress related to COVID-19 (EEP-10-C, for its acronym in Spanish) and to identify the levels of stress perceived by students of medical sciences in Cuba due to the COVID-19 pandemic.

Methods: A cross-sectional study was conducted, with self-reported data of students from 14 Cuban universities of medical sciences (n=200), through an online survey. The EEP-10-C was used as an instrument to identify stress. Read More

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December 2020

Application of a scheimpflug-based biomechanical analyser and tomography in the early detection of subclinical keratoconus in chinese patients.

BMC Ophthalmol 2021 Sep 20;21(1):339. Epub 2021 Sep 20.

Department of Ophthalmology, Peking University Third Hospital, Beijing, China.

Background: In vivo corneal biomechanics evaluation has been used to help screen early keratoconus in recent years. This study is to evaluate the value of a Scheimpflug-based biomechanical analyser combined with tomography in detecting subclinical keratoconus by distinguishing normal eyes from frank keratoconus (KC) and forme frusta keratoconus (FFKC) eyes in Chinese patients.

Methods: Study design: diagnostic test. Read More

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September 2021

Sensing of oxidative stress biomarkers: The cardioprotective effect of taurine & grape seed extract against the poisoning induced by an agricultural pesticide aluminum phosphide.

Chemosphere 2021 Sep 14;287(Pt 3):132245. Epub 2021 Sep 14.

School of Physics, University of Electronic Science and Technology of China, Chengdu, 610054, China.

Aluminum phosphide is a well-known hazardous agent used as an agricultural pesticide to protect stored grains from insect damage. However, accidental consumption of a trivial amount of it caused irreversible damage to the human body or even death in acute cases. The present study used taurine and grape seed extract as a natural cardioprotective medicine against aluminum phosphide poisoning by decreasing oxidative stress. Read More

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September 2021

Medialized versus Lateralized Humeral Implant in Reverse Total Shoulder Arthroplasty: The Comparison of Outcomes in Pseudoparalysis with Massive Rotator Cuff Tear.

J Shoulder Elbow Surg 2021 Sep 17. Epub 2021 Sep 17.

Department of Orthopaedic Surgery, Myongji Hospital, 697-24 Hwajung-dong, Deokyang-gu, Goyang-si, Gyeonggi-do 412-270, Republic of Korea. Electronic address:

Background: With the increasing use of the lateralized humeral implants in reverse total shoulder arthroplasty (RTSA), it is still unclear whether or not this design will be as advantageous as the medialized humeral implants in the setting of pseudoparalysis (PP).

Methods: A total of 51 eligible RTSA cases for PP signs due to massive rotator cuff deficiency were selected for the retrospective review. Twenty-five patients were allocated to Group L in which the isolated humeral side lateralization was performed (neck-shaft angle of 145°), and 26 patients were allocated to Group M (neck-shaft angle of 155°). Read More

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September 2021

Lateralized Glenosphere Reverse Shoulder Arthroplasty: Inlay and Onlay Designs have Similar Clinical Outcomes in Patients with Glenohumeral Osteoarthritis.

J Shoulder Elbow Surg 2021 Sep 17. Epub 2021 Sep 17.

Department of Orthopaedic Surgery, The Johns Hopkins University, Baltimore, MD, USA. Electronic address:

Background: Whether or how the position of the humeral tray (inlay or onlay) in reverse shoulder arthroplasty (RSA) affects outcomes is unclear. Our goal was to compare the clinical and radiographic results of RSA systems with inlay versus onlay designs but with similar neck shaft angles (NSAs) and lateralized glenospheres.

Methods: We screened the institutional database at our tertiary academic center for patients who underwent primary RSA (with a lateralized glenosphere and a 135° NSA) from 2009 through 2017. Read More

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September 2021

CAFS: Cost-Aware Features Selection Method for Multimodal Stress Monitoring on Wearable Devices.

IEEE Trans Biomed Eng 2021 Sep 20;PP. Epub 2021 Sep 20.

Objective: Today, stress monitoring on wearable devices is challenged by the tension between high-detection accuracy and battery lifetime driven by multimodal data acquisition and processing. Limited research has addressed the classification cost on multimodal wearable sensors, particularly when the features are cost-dependent. Thus, we design a Cost-Aware Feature Selection (CAFS) methodology that trades-off between prediction-power and energy-cost for multimodal stress monitoring. Read More

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September 2021

The Effectiveness of Ischemia Modified Albumin in Determining Acute Cholecystitis and its Severity.

Clin Lab 2021 Sep;67(9)

Background: Acute cholecystitis (AC) is caused by chemical and bacterial inflammation of the gallbladder. The use of Tokyo guidelines is recommended in determining the diagnosis of AC and its clinical severity. In the early stages of AC, many cytokines are secreted due to the local inflammatory cell activation, leading to exacerbation of inflammation and organ failure. Read More

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September 2021

Revisiting the Women Workplace Culture Scale: Validation and Psychometric Properties of a Three-Factor Structure in an Iranian Study Sample.

Eur J Investig Health Psychol Educ 2020 Sep 21;10(3):915-934. Epub 2020 Sep 21.

Department of Psychology, Faculty of Humanities, University of Bojnord, Bojnord 9453155111, Iran.

This paper describes the validation process of the Persian version of the Women Workplace Culture Scale and provides information about the perception of this culture in an Iranian working environment. A 30-item Persian version of the Women Workplace Culture (WWC) Questionnaire was administered to women working in public departments of the city of Bojnord, Iran (N = 200). As a result of a theory- and data-driven bottom-up empirical approach, a reduced 10-item three-dimensional scale was achieved entailing (I) perceived societal barriers for career development, (II) perceived organizational barriers, and (III) sexual harassment. Read More

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September 2020

Effect of Hydrated Carbon 60 Fullerene on Frozen Ram Semen Quality.

Biopreserv Biobank 2021 Sep 20. Epub 2021 Sep 20.

Department of Reproduction and Artificial Insemination and Faculty of Veterinary Medicine, Fırat University, Elazığ, Turkey.

The aim of this study was to evaluate the effect of hydrated carbon 60 fullerene (CHyFn) on ram semen quality during cryopreservation. Three ejaculates from each of seven Akkaraman rams were collected using an artificial vagina during the nonbreeding season and pooled. Pooled semen samples were divided into 10 equal parts and diluted with tris + egg yolk extender not containing (control) and containing 100, 200, 400, and 800 nM and 1, 5, 10, 20, and 40 μM CHyFn at 37°C. Read More

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September 2021

Relationship between functional Nrf2 gene promoter polymorphism and sperm DNA damage in male infertility.

Syst Biol Reprod Med 2021 Sep 19:1-14. Epub 2021 Sep 19.

Department of Urology, School of Medicine, Ankara University, Ankara, Turkey.

This study examines the association of the -617 C > A polymorphism in the Nrf2 gene (rs6721961) with male infertility in a Turkish population and determines its functional role in spermatogenesis in correlation with the impact of different levels of DNA damage on the genotypes. A total of 100 infertile men and 100 healthy fertile men were included in the study. Nrf2 genotyping was performed with the PCR-based restriction fragment length gene polymorphism (RFLP-PCR) analysis. Read More

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September 2021

Stress-induced changes in effective connectivity during regulation of the emotional response to threat.

Brain Connect 2021 Sep 19. Epub 2021 Sep 19.

University of Alabama at Birmingham School of Social and Behavioral Sciences, 200297, CIRC 235H, Birmingham, Alabama, United States, 35294-1152;

Background: Stress-related disruption of emotion regulation appears to involve the prefrontal cortex (PFC) and amygdala. However, the interactions between brain regions that mediate stress-induced changes in emotion regulation remain unclear. The present study builds upon prior work that assessed stress-induced changes in the neurobehavioral response to threat by investigating effective connectivity between these brain regions. Read More

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September 2021