9,708,656 results match your criteria study


Georgian Med News 2021 Mar(312):31-36

I.M. Sechenov First State Medical University of the Ministry of Health of the Russian Federation (Sechenov University), Moscow, Russian Federation.

The goal of the study was to find ways to improve the quality of preoperative diagnosis of mucinous cystic liver neoplasms using such tumor markers as CA 19-9 and telomerase activity. We conducted a retrospective analysis and a prospective study that included the results of treatment of 80 patients with cystic neoplasm of the liver (31 with MCNL, 36 with multichamber non-parasitic cysts (NPC), 13 with stage II (WHO classification) echinococcus liver cysts. Our study showed the presence of telomerase activity in 29 (93. Read More

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Georgian Med News 2021 Mar(312):27-31

Bukovinian State Medical University, Chernivtsi, Ukraine.

Considering an increasing the incidence of diabetes mellitus, the aim of the study was to improve the results of treatment of patients with diabetic foot syndrome due to the proposed complex VAC-associated therapy. The use of this method within 5 days of treatment was increased the local blood flow of the wounds from 26-31 to 49-53 mm Hg (p<0.01), while in the comparison group the blood flow was at the level of 32-37 mm Hg. Read More

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Georgian Med News 2021 Mar(312):23-26

2Ivane Javakhishvili Tbilisi State University, Georgia.

The purpose was to study the features and results of redo laparoscopic antireflux surgery. For the period from 2008 to 2019, in Odessa Regional Hospital laparoscopic antireflux operations were performed in 1164 patients. 57 patients underwent laparoscopic reoperation during the study period based on the following indications: recurrence of hiatal hernia (n=37), recurrent reflux (n=4), dysphagia (n=8), severe pain (n=5), esophageal stricture (n=3). Read More

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Georgian Med News 2021 Mar(312):7-14

Federal State Autonomous Educational Institution of Higher Education I.M. Sechenov First Moscow State Medical University (Sechenov University) of the Ministry of Health of the Russian Federation.

The aim of the study was to study the effectiveness of complex treatment of decompensated chronic venous insufficiency (CVI) using innovative techniques and proteolysis inhibitors with a wide spectrum of activity in patients with SARS-CoV-2 (COVID-19) in COVID hospital. This study was performed in the surgical department of COVID hospital on the basis of the Clinical Hospital No. 4 of the First Moscow State Medical University named I. Read More

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Follow-up of functional exercise capacity in patients with COVID-19: It is improved by telerehabilitation.

Respir Med 2021 Apr 30;183:106438. Epub 2021 Apr 30.

Service de Pneumologie, Cliniques Universitaires Saint-Luc, Brussels, Belgium; Institut de Recherche Expérimentale et Clinique (IREC), Pôle de Pneumologie, ORL & Dermatologie, Université Catholique de Louvain, Brussels, Belgium; Secteur de Kinésithérapie et Ergothérapie, Cliniques Universitaires Saint-Luc, Brussels, Belgium. Electronic address:

Background: The impact of the COVID-19 pandemic on functional exercise capacity seemed quickly clinically evident. The objective of this study was to assess the functional exercise capacity of patients with severe COVID-19 and to evaluate the effect of a telerehabilitation program in the specific context of the COVID-19 pandemic.

Method: Patients hospitalized for severe or critical COVID-19 were recruited. Read More

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Engineering diacetylchitobiose deacetylase from Pyrococcus horikoshii towards an efficient glucosamine production.

Bioresour Technol 2021 May 1;334:125241. Epub 2021 May 1.

Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, Jiangnan University, Wuxi 214122, China; Science Center for Future Foods, Jiangnan University, Wuxi 214122, China. Electronic address:

In this study, semi-rational design based on site-directed saturation mutagenesis and surface charge modification was used to improve the catalytic efficiency of the diacetylchitobiose deacetylase derived from Pyrococcus horikoshii (PhDac). PhDac mutant M14, which was screened by site-directed saturation mutagenesis, showed a ~ 2.21 -fold enhanced catalytic efficiency (k/K) and the specific activity was improved by 70. Read More

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APE1 facilitates PD-L1-mediated progression of laryngeal and hypopharyngeal squamous cell carcinoma.

Int Immunopharmacol 2021 May 5;97:107675. Epub 2021 May 5.

Department of Otolaryngology Head and Neck Surgery, Shengjing Hospital of China Medical University, Shenyang 110004, Liaoning, China. Electronic address:

Laryngeal squamous cell carcinoma (LSCC) and hypopharyngeal squamous cell carcinoma (HSCC) seriously affect the life quality of patients. Nowadays, immunotherapy is widely used in the treatment of cancer. Tumor-infiltrating lymphocytes (TILs), programmed cell death 1 (PD-1) and its ligand programmed cell death ligand 1 (PD-L1) play key roles in the immunotherapy of cancer. Read More

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Monitoring the early aggregatory behaviour and size of Aβ in the absence & presence of metal ions using dynamic light scattering.

J Trace Elem Med Biol 2021 May 3;67:126766. Epub 2021 May 3.

The Birchall Centre, Lennard-Jones Laboratories, Keele University, Keele, Staffordshire, ST5 5BG, UK.

Background And Aim: Aβ is an amyloidogenic peptide found within senile plaques extracted from those who died with a diagnosis of Alzheimer's disease. The potent neurotoxicity of this peptide is related to its propensity to form aggregated conformations in vivo, a process that is influenced by the species and concentration of metal ions present within the local environment. This study examines the impact of different metals upon the early aggregatory behaviour and size of Aβ under simulated physiological conditions. Read More

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Impact of CO overpressure on yeast mitochondrial associated proteome during the "prise de mousse" of sparkling wine production.

Int J Food Microbiol 2021 May 4;348:109226. Epub 2021 May 4.

Department of Agricultural Chemistry, Edaphology and Microbiology, Severo Ochoa (C6) building, Agrifood Campus of International Excellence CeiA3, University of Cordoba, Ctra. N-IV-A mm 396, 14014 Cordoba, Spain. Electronic address:

The "prise de mousse" stage during sparkling wine elaboration by the traditional method (Champenoise) involves a second fermentation in a sealed bottle followed by a prolonged aging period, known to contribute significantly to the unique organoleptic properties of these wines. During this stage, CO overpressure, nutrient starvation and high ethanol concentrations are stress factors that affect yeast cells viability and metabolism. Since mitochondria are responsible for energy generation and are required for cell aging and response to numerous stresses, we hypothesized that these organelles may play an essential role during the prise de mousse. Read More

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New nitric oxide-releasing indomethacin derivatives with 1,3-thiazolidine-4-one scaffold: Design, synthesis, in silico and in vitro studies.

Biomed Pharmacother 2021 May 5;139:111678. Epub 2021 May 5.

Department of Pharmaceutical Chemistry, Faculty of Pharmacy, "Grigore T. Popa" University of Medicine and Pharmacy of Iași, 16 University Street, Iasi, Romania. Electronic address:

In this study we present design and synthesis of nineteen new nitric oxide-releasing indomethacin derivatives with 1,3-thiazolidine-4-one scaffold (NO-IND-TZDs) (6a-s), as a new safer and efficient multi-targets strategy for inflammatory diseases. The chemical structure of all synthesized derivatives (intermediaries and finals) was proved by NMR and mass spectroscopic analysis. In order to study the selectivity of NO-IND-TZDs for COX isoenzymes (COX-1 and COX-2) a molecular docking study was performed using AutoDock 4. Read More

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Moment estimation method of parameters in additive measurement error model.

Comput Methods Programs Biomed 2021 Apr 17;206:106090. Epub 2021 Apr 17.

Department of Mathematics, The Hong Kong University of Science and Technology, Hong Kong SAR, PR China.

Background: In nutritional epidemiology, covariates in some studies such as the EPIC are prone to measurement error. Estimation of unknown parameters in most measurement error models for food frequency questionnaire (FFQ) and nutrient biomarkers requires replicated measurements. But, the EPIC-InterAct Study did not collect replicated measurements for FFQ or 24-hour dietary recalls (24HR). Read More

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Incidence and risk factors associated with the development of epilepsy in patients with intracranial alveolar echinococcosis.

Epilepsy Res 2021 Apr 27;174:106643. Epub 2021 Apr 27.

Department of Neurology, West China Hospital, Sichuan University, No. 37 Guoxue Road, Chengdu, Sichuan, 610041, People's Republic of China. Electronic address:

Parasitic infection remains a critical health problem in Ganzi Tibetan Autonomous Prefecture of China. The association of epilepsy and intracranial alveolar echinococcosis (IAE) is still largely unclear. This study primarily aimed to assess both the incidence and possible risk factors of epilepsy in patients with IAE. Read More

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Automated detection of hippocampal sclerosis: Comparison of a composite MRI-based index with conventional MRI measures.

Epilepsy Res 2021 Apr 9;174:106638. Epub 2021 Apr 9.

Department of Radiology, Sanbo Brain Hospital, Capital Medical University, China. Electronic address:

Purpose: This study aims to compare the performance of an MRI-based composite index (HSI) with conventional MRI-based measures in hippocampal sclerosis (HS) detection and postoperative outcome estimation.

Methods: Seventy-two temporal lobe epilepsy (TLE) patients with pathologically confirmed HS and fifteen TLE patients without HS were included retrospectively. The T1-weighted and FLAIR images of these patients were processed with AccuBrain to quantify the hippocampal volume (HV) and the hippocampal FLAIR signal. Read More

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Platelet heterogeneity enhances blood clot volumetric contraction: An example of asynchrono-mechanical amplification.

Biomaterials 2021 Apr 23;274:120828. Epub 2021 Apr 23.

George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, 801 Ferst Drive, Atlanta, GA, 30332-0405, USA. Electronic address:

Physiological processes such as blood clotting and wound healing as well as pathologies such as fibroses and musculoskeletal contractures, all involve biological materials composed of a contracting cellular population within a fibrous matrix, yet how the microscale interactions among the cells and the matrix lead to the resultant emergent behavior at the macroscale tissue level remains poorly understood. Platelets, the anucleate cell fragments that do not divide nor synthesize extracellular matrix, represent an ideal model to study such systems. During blood clot contraction, microscopic platelets actively pull fibers to shrink the macroscale clot to less than 10% of its initial volume. Read More

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Use of virtual reality in the inpatient rehabilitation of COVID-19 patients.

Gen Hosp Psychiatry 2021 Apr 29;71:76-81. Epub 2021 Apr 29.

Department of Medicine, Weill Cornell Medicine, New York, NY; Division of Hospital Medicine, Ascension Saint Thomas Hospital West, Nashville, TN.

Introduction: Use of virtual reality (VR) in healthcare has expanded in recent years. The challenges faced by patients with prolonged COVID-19-related hospitalizations - social isolation, disability, neurologic sequelae, adjustment-related anxiety, depression, and stress - may be mitigated by the novel use of VR as one modality of a comprehensive rehabilitation plan. This descriptive study aimed to understand patient satisfaction and perceived benefit of virtual reality on a COVID-19 recovery unit, as well as the logistical and operational feasibility of providing VR content for patients and staff. Read More

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A method for measuring dynamic respiratory sinus arrhythmia (RSA) in infants and mothers.

Infant Behav Dev 2021 May 5;63:101569. Epub 2021 May 5.

Department of Psychological and Brain Sciences, Indiana University, United States.

The measurement of respiratory sinus arrythmia (RSA) in infants, children and adults is critical to the study of physiological regulation, and more recently, interpersonal physiological covariation, but it has been impeded by methods that limit its resolution to 30 s or longer. Recent analytical developments have suggested methods for studying dynamic RSA in adults, and we have extended this work to the study of infants and mothers. In the current paper, we describe a new analytical strategy for estimating RSA time series for infants and adults. Read More

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Fasting gallbladder volume is increased in patients with Parkinson's disease.

Parkinsonism Relat Disord 2021 Apr 30;87:56-60. Epub 2021 Apr 30.

Department of Nuclear Medicine and PET, Aarhus University Hospital, Palle Juul-Jensens Boulevard 165, J220, 8200, Aarhus N, Denmark.

Introduction: Autonomic denervation in patients with Parkinson's disease (PD) and isolated REM-sleep behavior disorder (iRBD) could impede gallbladder function leading to increased fasting gallbladder volume (fGBV) and higher risk of gallstones. We aimed to determine fGBV in patients with PD, iRBD, and healthy controls (HCs).

Methods: We included 189 subjects; 100 patients with PD, 21 with iRBD, and 68 HCs. Read More

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Comparison in detection of prodromal Parkinson's disease patients using original and updated MDS research criteria in two independent cohorts.

Parkinsonism Relat Disord 2021 Apr 30;87:48-55. Epub 2021 Apr 30.

Department of Neurology, P. J. Safarik University, Trieda SNP 1, 04011, Kosice, Slovak Republic; Department of Neurology, University Hospital L. Pasteur, Rastislavova 43, 04190, Kosice, Slovak Republic.

Introduction: MDS research criteria for prodromal Parkinson's disease (pPD) were published in 2015 and updated in 2019. We aimed to determine the difference in pPD patient detection rates in two cohorts recruited via gastrointestinal symptoms (PARCAS study) and the presence of a probable REM sleep behaviour disorder (PDBIOM study) using the original and updated criteria.

Methods: We evaluated all risk and prodromal markers, except genetic testing, plasma urate and physical inactivity, in both cohorts and DaT scan, diabetes mellitus type II and cognitive deficit in the PARCAS cohort. Read More

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Assessing multiproxy approaches (Sr/Ca, U/Ca, Li/Mg, and B/Mg) to reconstruct sea surface temperature from coral skeletons throughout the Great Barrier Reef.

Sci Total Environ 2021 Apr 29;786:147393. Epub 2021 Apr 29.

Australian Institute of Marine Science, PMB No 3, Townsville MC, Qld 4810, Australia.

Due to the increasing concerns of global warming and short instrumental records of sea surface temperature (SST), coral-based proxies, such as δO, Sr/Ca, U/Ca, and Li/Mg have been developed and applied to reconstruct SST in paleoclimate studies. However, these proxies are not universally applicable in different environments, because they are affected by coral physiology and various environmental factors. In this study, seven long-lived Porites corals were collected from the southern sector of the Great Barrier Reef (GBR) off the coast of Gladstone and the central sector of the GBR within the Whitsunday Islands in 2017 and 2018. Read More

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Microbial degradation of pyrene in holm oak (Quercus ilex) phyllosphere: Role of particulate matter in regulating bioaccessibility.

Sci Total Environ 2021 Apr 30;786:147431. Epub 2021 Apr 30.

Instituto de Recursos Naturales y Agrobiologıá de Sevilla (IRNAS-CSIC), E-41080 Seville, Spain.

In this study we first measured the mineralization of pyrene on leaves of urban holm oak (Quercus ilex) by autochthonous microorganisms and an inoculated PAH degrading bacterium (i.e., Mycobacterium gilvum), selected as a model phyllosphere species, as well as the leaf-water (K) and leaf-air (K) partition coefficients for this chemical. Read More

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Multiple drivers, interaction effects, and trade-offs of efficient and cleaner combustion of torrefied water hyacinth.

Sci Total Environ 2021 Apr 23;786:147278. Epub 2021 Apr 23.

School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China.

Developing cleaner and affordable alternatives to the sole reliance on fossil fuels has intensified efforts to improve the thermochemical conversion property of the second-generation lignocellulosic biomass. This study aimed to explore the effects of the two torrefaction temperatures (200 and 300 °C), the two reaction atmospheres (N/O and CO/O), and the three heating rates (5, 10, and 15 °C/min) on the combustion regime of water hyacinth (WH). Decomposition behaviors, reaction kinetics, thermodynamics, and mechanisms, evolved emissions and functional groups, and fuel microstructure properties were quantified. Read More

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Chitinase digestion for the analysis of microplastics in chitinaceous organisms using the terrestrial isopod Oniscus asellus L. as a model organism.

Sci Total Environ 2021 Apr 30;786:147455. Epub 2021 Apr 30.

NIVA Denmark Water Research, Njalsgade 76, 2300 Copenhagen S, Denmark; University of Copenhagen, Universitetsparken 4, Copenhagen Ø, Denmark; NIVA, Gaustadalléen 21, 0349 Oslo, Norway. Electronic address:

Chitinaceous organisms have been found to ingest microplastic; however, a standardised, validated, and time- and cost-efficient method for dissolving these organisms without affecting microplastic particles is still required. This study tested four protocols for dissolving organisms with a chitin exoskeleton: 1) potassium hydroxide (KOH) + chitinase, 2) Creon® + chitinase, 3) hydrogen peroxide (HO) + chitinase, and, 4) Nitric Acid (HNO) + hydrogen peroxide (HO). The effects on microplastics composed of eight different polymers were also tested. Read More

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Meta-transcriptomic profiling of functional variation of freshwater microbial communities induced by an antidepressant sertraline hydrochloride.

Sci Total Environ 2021 Apr 30;786:147434. Epub 2021 Apr 30.

College of Environment, Zhejiang University of Technology, Hangzhou 310014, PR China.

Sertraline hydrochloride (Ser-HCl) is an effective and commonly used antidepressant drug, which is also frequently detected in aquatic environments. Our previous research showed that Ser-HCl changes the community composition of aquatic microbiome, but the understanding of the expression of functional pathways in microbial communities is still incomplete; to address this knowledge gap, we used meta-transcriptomics analysis to evaluate the toxicity of Ser-HCl to natural aquatic microbial communities cultured in laboratory microcosms. Meta-transcriptomic results show that a 15-day exposure to 50 μg/L Ser-HCl significantly changed the functional expression activity of aquatic microbial communities. Read More

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Introducing intense rainfall and snowmelt variables to implement a process-related non-stationary shallow landslide susceptibility analysis.

Sci Total Environ 2021 Apr 27;786:147360. Epub 2021 Apr 27.

Dipartimento di Scienze della Terra "A. Desio", Università degli Studi di Milano, Milan, Italy.

The study objective was to derive a susceptibility model for shallow landslides that could include process-related non-stationary variables, to be adaptable to climate changes. We selected the territory of the Mont-Emilius and Mont-Cervin Mountain Communities (northern Italy) as the study area. To define summary variables related to landslide predisposing and triggering processes, we investigated the relationships between landslide occurrences and intense rainfall and snowmelt events (period 1991-2020). Read More

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Insecticide fipronil and its transformation products in human blood and urine: Assessment of human exposure in general population of China.

Sci Total Environ 2021 Apr 24;786:147342. Epub 2021 Apr 24.

Key Laboratory of Environment and Health (HUST), Ministry of Education & Ministry of Environmental Protection, and State Key Laboratory of Environmental Health (Incubation), School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430030, PR China. Electronic address:

Fipronil (FP) is widely used as a highly effective insecticide worldwide, thereby raising concern about environmental contamination and risk for human health. However, data on the occurrence of FP and its transformation products (FPs) in human blood and urine are limited. In this study, 39 pairs of serum, plasma, blood cells (BCs), and urine samples were collected from adults in Wuhan, central China (2020), in order to characterize the concentration profiles of FPs in different matrices. Read More

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LCA and economic study on the local oxygen supply in Central Europe during the COVID-19 pandemic.

Sci Total Environ 2021 Apr 29;786:147401. Epub 2021 Apr 29.

AGH University of Science and Technology, Faculty of Energy and Fuels, Department of Coal Chemistry and Environmental Sciences, Al. Mickiewicza 30, 30-059 Kraków, Poland. Electronic address:

Medical oxygen is the key to survival for COVID-19 patients. To meet the pandemic-driven oxygen demand spike, local hospitals began searching for a suitable medical oxygen delivery system. Among the studies published on the impact of COVID-19 on a range of aspects, including the global economy and the environment, no study has been conducted on the environmental impact of medical oxygen supply to hospitals under epidemic conditions. Read More

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Meta-analysis on the ecological impacts of widely spread non-indigenous species in the Baltic Sea.

Sci Total Environ 2021 Apr 28;786:147375. Epub 2021 Apr 28.

Finnish Environment Institute, Marine Research Center, Latokartanonkaari 11, 00790 Helsinki, Finland.

The introduction of non-indigenous species (NIS) is a major driver for global change in species biogeography, often associated with significant consequences for recipient ecosystems and services they provide for humans. Despite mandated by several high-level international legislative instruments, comprehensive quantitative evaluation on ecosystem impacts of marine NIS is scarce and lack a robust and data-driven assessment framework. The current study is aiming at fulfilling this gap, through quantitative assessment on the effects of the widespread NIS of the Baltic Sea on multiple ecosystem features and components including direct food-web effects. Read More

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Enhancement of perchloroethene dechlorination by a mixed dechlorinating culture via magnetic nanoparticle-mediated isolation method.

Sci Total Environ 2021 Apr 29;786:147421. Epub 2021 Apr 29.

Department of Environmental Engineering, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China; Zhejiang Provincial Key Laboratory for Water Pollution Control and Environmental Safety, Hangzhou 310058, China. Electronic address:

Highly enriched active dechlorinating cultures are important in advancing microbial remediation technology. This study attempted to enrich a rapid perchloroethene (PCE) dechlorinating culture via magnetic nanoparticle-mediated isolation (MMI). MMI is a novel method that can separate the fast-growing and slow-growing population in a microbial community without labelling. Read More

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Prediction of instantaneous real-world emissions from diesel light-duty vehicles based on an integrated artificial neural network and vehicle dynamics model.

Sci Total Environ 2021 Apr 27;786:147359. Epub 2021 Apr 27.

Department of Mechanical Engineering, Hanyang University, 222 Wangwimni-ro, Seongdong-gu, Seoul 04763, Republic of Korea. Electronic address:

This paper presents a road vehicle emission model that integrates an artificial neural network (ANN) model with a vehicle dynamics model to predict the instantaneous carbon dioxide (CO), nitrogen oxides (NOx) and total hydrocarbon (THC) emissions of diesel light-duty vehicles. Real-world measurement data were used to train a multi-layer feed-forward ANN model. The optimal combination of the various experimental variables was selected as the ANN input through a parametric study considering both practicality and accuracy. Read More

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Microplastics levels, size, morphology and composition in marine water, sediments and sand beaches. Case study of Tarragona coast (western Mediterranean).

Sci Total Environ 2021 Apr 30;786:147453. Epub 2021 Apr 30.

Environmental Engineering Laboratory, Departament d'Enginyeria Quimica, Universitat Rovira i Virgili, Av. Països Catalans 26, 43007 Tarragona, Catalonia, Spain.

Mediterranean Sea has been proposed as the sixth greatest accumulation zone for marine litter and the most affected regarding to microplastics (MPs). Tarragona (Catalonia, NE Spain) coastal region suffers high pressure due to urbanization, tourism, industrial harbour and petrochemical/plastic industries. The present study aims to quantify and characterize in size, morphology and composition the MPs present in sandy beaches, marine sediments, and surface seawaters of Tarragona coastal region. Read More

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