746,977 results match your criteria study studied

Comparative Cytogenetic Analysis of Three Eumeninae Species (Hymenoptera, Vespidae).

Cytogenet Genome Res 2021 May 12:1-10. Epub 2021 May 12.

Laboratório de Citogenética de Insetos, Departamento de Biologia Geral, Universidade Federal de Viçosa, Viçosa, Brazil.

Eumeninae represents the largest subfamily within Vespidae, with 3,600 species described. Of these, only 18 have been cytogenetically analysed. In the present study, we used both classical and molecular techniques to characterise and compare the karyotypes of 3 Eumeninae species, namely, Ancistrocerus sp. Read More

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Soybean residue based biochar prepared by ball milling assisted alkali activation to activate peroxydisulfate for the degradation of tetracycline.

J Colloid Interface Sci 2021 Apr 19;599:631-641. Epub 2021 Apr 19.

College of Environmental Science and Engineering, Hunan University, Lushan South Road, Yuelu District, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Lushan South Road, Yuelu District, Changsha 410082, PR China. Electronic address:

The advanced oxidation process (AOPs) has caused great concern in recent years. Among them, biochar has been widely studied as a catalyst for advanced oxidation process because of its low price and low environmental risk. In this study, a novel ball milling assisted KOH activation biochar (MKBC) was prepared and applied in peroxydisulfate (PDS) activation to degrade tetracycline hydrochloride (TC-H). Read More

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Is severe head injury associated with functional (psychogenic) seizures?

Seizure 2021 May 1;89:38-40. Epub 2021 May 1.

Epilepsy Research Center, Shiraz University of Medical Sciences, Shiraz, Iran.

Objectives: The aim of the current study was to compare the frequency of significant head injuries in three groups of people with seizures [idiopathic generalized epilepsies (IGE) vs. temporal lobe epilepsy (TLE) vs. functional seizures (FS)]. Read More

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De novo Transcriptome Assembly of Angelica dahurica and Characterization of Coumarin Biosynthesis Pathway Genes.

Gene 2021 May 9:145713. Epub 2021 May 9.

Anhui University of Chinese Medicine and Anhui Academy of Chinese Medicine, Hefei 230038, China; Synergetic Innovation Center of Anhui Authentic Chinese Medicine Quality Improvement, Hefei 230012, China. Electronic address:

Angelica dahurica (Hoffm.) Benth. & Hook. Read More

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Non-human primates as a model for human development.

Stem Cell Reports 2021 May;16(5):1093-1103

Institute for the Advanced Study of Human Biology (WPI-ASHBi), Kyoto University, Yoshida-Konoe-cho, Sakyo-ku, Kyoto 606-8501, Japan; Research Center for Animal Life Science, Shiga University of Medical Science, Seta-Tsukinowa-cho, Otsu, Shiga 520-2192, Japan. Electronic address:

Human development has been studied for over a century, but the molecular mechanisms underlying human embryogenesis remain largely unknown due to technical difficulties and ethical issues. Accordingly, mice have been used as a model for mammalian development and studied extensively to infer human biology based on the conservation of fundamental processes between the two species. As research has progressed, however, species-specific differences in characteristics between rodents and primates have become apparent. Read More

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microRNA-132 as a negative regulator in NF-κB signaling pathway via targeting IL-1β in miiuy croaker.

Dev Comp Immunol 2021 May 9:104113. Epub 2021 May 9.

Laboratory of Fish Molecular Immunology, College of Fisheries and Life Science, Shanghai Ocean University, Shanghai, China; Laboratory of Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China; Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources (Shanghai Ocean University), Ministry of Education, Shanghai, China; National Pathogen Collection Center for Aquatic Animals, Shanghai Ocean University, Shanghai, China. Electronic address:

The innate immune system is the first line of defense against the invasion of pathogens. It can make a rapid immune response to the invading pathogenic microorganisms, thereby eliminating the invading pathogens and protecting the body from harm. microRNAs are a family of small non-coding ribonucleic acid molecules, which are important and multifunctional regulator of immune response. Read More

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Cultured human uveal melanocytes express/secrete CXCL1 and CXCL2 constitutively and increased by lipopolysaccharide via activation of Toll-like receptor 4.

Curr Eye Res 2021 May 12. Epub 2021 May 12.

Institute of Medicine, Chung Shan Medical University, Taichung, Taiwan.

Purpose: Lipopolysaccharide (LPS) can activate Toll-like receptor 4 (TLR4) and increase the expression of CXCL1 and CXCL2, the potent neutrophils chemoattractants, in various cell types. These effects have not been previously reported in the uveal melanocytes. This study was designed to investigate the effects of LPS on the activation of TLR4 and expression of CXCL1/CXCL2 in cultured human uveal melanocytes and the relevant signal pathways. Read More

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Infrared thermal imaging monitoring on hands when performing repetitive tasks: An experimental study.

PLoS One 2021 12;16(5):e0250733. Epub 2021 May 12.

Faculty of Chemical Sciences and Engineering, Autonomous University of Baja California, Tijuana, Mexico.

The monitoring of infrared thermal images is reported to analyze changes in skin temperature in the hand fingers when repetitive work is performed to know which finger has a greater risk of injury, besides, the recovery time is analyzed regarding the initial temperature and its relationship with age, sex, weight, height if practice sports, and Body Mass Index (BMI) per individual. For the above, an experimental test was carried out for 10 minutes on a repetitive operation that takes place in the telecommunications industry and 39 subjects participated in which an infrared thermal image of the dorsal and palmar part of both hands was taken in periods of 5 minutes after the 10-minute test has elapsed. The results show that none of the participants recovered their initial temperature after 10 minutes of the experimental test. Read More

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Measuring quality of hepatitis B care in a remote Australian Aboriginal community; opportunities for improvement.

Intern Med J 2021 May 12. Epub 2021 May 12.

Hepatology and Liver Transplantation Medicine Unit, Flinders Medical Centre, Bedford Park, South Australia, Australia.

Background: Chronic hepatitis B (CHB) infection remains a significant public health issue for Indigenous Australians, in particular for remote communities.

Aim: This study aimed to evaluate the spectrum of hepatitis B virus (HBV) care provided to a remote Aboriginal community. Measures studied included screening, seroprevalence, vaccination rates and efficacy, and HCC risk and surveillance adherence. Read More

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Do governance indicators interact with technological innovation and income inequality in mitigating CO emissions in Belt and Road Initiative countries?

Environ Sci Pollut Res Int 2021 May 12. Epub 2021 May 12.

School of Economics, Nankai University, Tianjin, China.

Environmental degradation is being studied by linking with various factors depending upon the interest of researchers. Our interest is in investigating how income inequality and innovation affect the role of governance in mitigating CO emissions in Belt and Road Initiative (BRI) countries because no previous study provides any thoughtful insight into this. We also included Gini and technological innovation in our model to check the interaction effect with governance. Read More

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Long-wavelength UVA enhances UVB-induced cell death in cultured keratinocytes: DSB formation and suppressed survival pathway.

Photochem Photobiol Sci 2021 May 12. Epub 2021 May 12.

National Institute of Occupational Safety and Health, Kawasaki, Japan.

Solar UV radiation consists of both UVA and UVB. The wavelength-specific molecular responses to UV radiation have been studied, but the interaction between UVA and UVB has not been well understood. In this study, we found that long-wavelength UVA, UVA1, augmented UVB-induced cell death, and examined the underlying mechanisms. Read More

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Characithecium spp. (Monogenea: Dactylogyridae) from Astyanax bimaculatus (Characiformes: Characidae) in Northeast Brazil, with Description of a New Species.

Acta Parasitol 2021 May 12. Epub 2021 May 12.

Department of Biological Sciences, Regional University of Cariri (Urca), Rua Coronel Antônio Luiz, n° 1,161, Crato, Ceará, 63105-000, Brazil.

Purpose: To date, seven species of Characithecium Mendonza-Franco, Reina and Torchin, 2009 (Monogenea, Dactylogyridae) are valid, parasitizing mainly fishes of the family Characidae (Characiformes) in the Neotropical region. During a parasitological study of fishes in the Batateiras River and Carás stream, Ceará state, Brazil, two species of Characithecium were collected from the gills of Astyanax bimaculatus Linnaeus, 1758 (Characidae). The purpose of the present study is to describe a new species of monogenean of the genus Characithecium and report Characithecium costaricensis Mendoza-Franco, Reina and Torchin, 2009 in A. Read More

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Nutritional Predictors of Wound Infection in Patients with Lower Extremity Soft Tissue Sarcoma.

Ann Surg Oncol 2021 May 12. Epub 2021 May 12.

Department of Orthopaedic Surgery, Division Musculoskeletal Oncology, Massachusetts General Hospital, Boston, MA, USA.

Background: Soft tissue sarcoma (STS) frequently requires high-risk surgery that predisposes patients to complex wounds. Past studies have identified a variety of tumor characteristics as risk factors for wound infection (WI); however, physiologic characteristics have not yet been studied in this population. Thus, the objective of this study is to identify any nutritional indicators and physiologic characteristics associated with the development of WI. Read More

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The influence of patellofemoral stabilisation surgery on joint congruity: an MRI surface mapping study.

Eur J Orthop Surg Traumatol 2021 May 12. Epub 2021 May 12.

Avon Orthopaedic Centre, Southmead Hospital, Bristol, UK.

Background: In the unstable patellofemoral joint (PFJ), the patella will articulate in an abnormal manner, producing an uneven distribution of forces. It is hypothesised that incongruency of the PFJ, even without clinical instability, may lead to degenerative changes. The aim of this study was to record the change in joint contact area of the PFJ after stabilisation surgery using an established and validated MRI mapping technique. Read More

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Non-dynamic graciloplasty is an effective treatment for patients with passive fecal incontinence.

Tech Coloproctol 2021 May 12. Epub 2021 May 12.

Department of Surgery, Groene Hart Ziekenhuis, Bleulandweg 10, 2803 HH, Gouda, The Netherlands.

Background: Fecal incontinence is a multifactorial problem and its etiology is complex. Various therapies are available and different success rates have been described. The aim of this study was to assess the effectiveness and safety of non-dynamic graciloplasty in patients with passive fecal incontinence. Read More

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Preoperative REM sleep is associated with complication development after colorectal surgery.

Surg Endosc 2021 May 12. Epub 2021 May 12.

Department of Surgery, University of Virginia Health System, Charlottesville, USA.

Background: While total sleep duration and rapid eye movement (REM) sleep duration have been associated with long-term mortality in non-surgical cohorts, the impact of preoperative sleep on postoperative outcomes has not been well studied.

Methods: In this secondary analysis of a prospective observational cohort study, patients who recorded at least 1 sleep episode using a consumer wearable device in the 7 days before elective colorectal surgery were included. 30-day postoperative outcomes among those who did and did not receive at least 6 h of total sleep, as well as those who did and did not receive at least 1 h of rapid eye movement (REM) sleep, were compared. Read More

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Total Arsenic Concentrations in Sea Turtle Tissues from the Mediterranean Coast of Spain.

Bull Environ Contam Toxicol 2021 May 12. Epub 2021 May 12.

Fisheries and Aquaculture Service (CARM), 30100, Murcia, Spain.

In this work we studied total arsenic concentrations in liver, muscle and kidney of 49 individuals of two sea turtle species (loggerhead sea turtles, n = 45; leatherback turtles, n = 4) stranded in Murcia (South-eastern Spain) coastline between 2009 and 2018. In accordance with the literature, muscle was the tissue with the highest concentrations in both species, followed by liver and kidney. Although differences in arsenic concentrations were not statistically significant between the study species, loggerhead sea turtles showed concentrations two or three times higher than those of leatherback turtles, which we attribute to differences on feeding behavior and habitat preferences. Read More

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Association of Left Ventricular Systolic Dysfunction Among Carriers of Truncating Variants in Filamin C With Frequent Ventricular Arrhythmia and End-stage Heart Failure.

JAMA Cardiol 2021 May 12. Epub 2021 May 12.

Heart Failure and Heart Transplantation Unit, Virgen del Rocio University Hospital, Sevilla, Spain.

Importance: Truncating variants in the gene encoding filamin C (FLNCtv) are associated with arrhythmogenic and dilated cardiomyopathies with a reportedly high risk of ventricular arrhythmia.

Objective: To determine the frequency of and risk factors associated with adverse events among FLNCtv carriers compared with individuals carrying TTN truncating variants (TTNtv).

Design, Setting, And Participants: This cohort study recruited 167 consecutive FLNCtv carriers and a control cohort of 244 patients with TTNtv matched for left ventricular ejection fraction (LVEF) from 19 European cardiomyopathy referral units between 1990 and 2018. Read More

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Measurement of the conformational switching of azobenzenes from the macro- to attomolar scale in self-assembled 2D and 3D nanostructures.

Phys Chem Chem Phys 2021 May 12. Epub 2021 May 12.

Institute of Organic Synthesis and Photoreactivity (ISOF) - (CNR), via Gobetti 101, 40129 Bologna, Italy. and Department of Industrial and Materials Science, Chalmers University of Technology, Hörsalvägen 7, 41296 Gothenburg, Sweden.

It is important, but challenging, to measure the (photo)induced switching of molecules in different chemical environments, from solution through thin layers to solid bulk crystals. We compare the cis-trans conformational switching of commercial azobenzene molecules in different liquid and solid environments: polar solutions, liquid polymers, 2D nanostructures and 3D crystals. We achieve this goal by using complementary techniques: optical absorption spectroscopy, femtosecond transient absorption spectroscopy, Kelvin probe force microscopy and reflectance spectroscopy, supported by density functional theory calculations. Read More

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Evaluation of change in pterygium induced keratometric astigmatism in patients following pterygium excision with autologous graft surgery.

Nepal J Ophthalmol 2020 Jul;12(24):191-200

Rajshree Medical Research Institute and Hospital, Bareilly (UP), India.

Pterygium is a common surface disorder of the eye that may cause change in visual acuity of patients by inducing astigmatic refractive error. Surgical excision with grafting is considered the most effective recommended treatment for pterygium. The objective of this study was to evaluate the outcomes of pterygium excision with autologous graft surgery on keratometric astigmatism and visual acuity. Read More

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IL1A and IL1B gene polymorphisms and keratoconus susceptibility: evidence from an updated meta-analysis.

Ophthalmic Genet 2021 May 12:1-11. Epub 2021 May 12.

Cellular and Molecular Research Center, Resistant Tuberculosis Institute, Zahedan University of Medical Sciences, Zahedan, Iran.

: Several single-nucleotide polymorphisms (SNPs) in genes have been associated with KTCN. However, the results of these studies were not conclusive. This meta-analysis association study is aimed to quantitatively estimate the association of ( and (), and () polymorphisms with KTCN susceptibility. Read More

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Impact of Patient Socioeconomic Disparities on Time to Tympanostomy Tube Placement.

Ann Otol Rhinol Laryngol 2021 May 12:34894211015741. Epub 2021 May 12.

UPMC Children's Hospital of Pittsburgh, Division of Pediatric Otolaryngology, Pittsburgh, PA, USA.

Objectives: Extensive literature exists documenting disparities in access to healthcare for patients with lower socioeconomic status (SES). The objective of this study was to examine access disparities and differences in surgical wait times in children with the most common pediatric otolaryngologic surgery, tympanostomy tubes (TT).

Methods: A retrospective cohort study was performed at a tertiary children's hospital. Read More

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Stereotactic Radiosurgery for Differentiated Thyroid Cancer Brain Metastases: An International, Multicenter Study.

Thyroid 2021 May 11. Epub 2021 May 11.

Department of Neurosurgery, University of Virginia, Charlottesville, Virginia, USA.

Brain metastases (BM) from differentiated thyroid cancer are rare. Stereotactic radiosurgery (SRS) is commonly used for the treatment of BMs; however, the experience with SRS for thyroid cancer BMs remains limited. The goal of this international, multi-centered study was to evaluate the efficacy and safety of SRS for thyroid cancer BMs. Read More

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Factores asociados a retrasos de tiempo desde el electrocardiograma diagnóstico hasta el paso de guía en el infarto agudo de miocardio con elevación del segmento ST transferido para angioplastia primaria.

Emergencias 2021 Jun;33(3):195-202

Hospital Universitario Josep Trueta, Girona, España. Departamento de Ciencias Médicas, Facultad de Medicina, Universidad de Girona, Girona, España. Biomedical Research Institute, Girona (IdIBGi). ICS, Girona, España. Centro de Investigación Biomédica en Red Enfermedades Cardiovasculares (CIBER CV), España.

Objectives: To identify predictors of primary angioplasty delay in patients with ST-elevation myocardial infarction (STEMI) transported from out-of-hospital sites or from hospitals without percutaneous coronary intervention (PCI) suites.

Material And Methods: Retrospective cohort study of cases between 2008 and 2018 in a university hospital receiving patients diagnosed with STEMI who required a PCI. We performed linear and multivariate regression analyses to identify factors that predicted delay in interpreting a diagnostic electrocardiogram (ECG) until the guidewire passed the lesion (diagnosis-guidewire-crossing time). Read More

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Brain activity in well-controlled perinatally HIV-infected young adults: a fMRI pilot study.

Rev Neurol 2021 May;72(10):343-351

Hospital Universitario 12 de Octubre, Madrid, España.

Introduction And Aim: Perinatal transmission of human immunodeficiency virus (PHIV) is considered a chronic disease that has highlighted several cognitive deficits. From birth to early adulthood, cognition is known to play a fundamental role. However, although neurocognitive processes associated with PHIV have been extensively described by psychometric testing, data is scarce on neural activity from functional magnetic resonance imaging (fMRI) which provides in vivo physiological information. Read More

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The Microstructure and Reasonable Management of the Arachnoid During the Infrafloccular Approach for Microvascular Decompression of the Facial Nerve.

Turk Neurosurg 2020 Oct 30. Epub 2020 Oct 30.

The Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an City, Department of Neurosurgery, Shaanxi Province, The People's Republic of China.

Aim: Arachnoid dissection is a basic step during facial nerve microvascular decompression (MVD). However, the literature focusing on the arachnoid microstructure in this region is scarce, and there are different views on how to handle the arachnoid around the cochlea nerve in order to protect the cochlea nerve. To provide a valuable reference for minimal invasion during facial nerve MVD, the arachnoid microstructure during the infrafloccular approach was studied in this paper. Read More

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October 2020


Rev Paul Pediatr 2021 5;39:e2020087. Epub 2021 May 5.

Pediatrics Departament, Universidade Federal de São Paulo, São Paulo, SP, Brazil.

Objective: To identify the effects of vitamin D supplementation during pregnancy on newborns and infants.

Data Sources: The present study is an integrative review of literature based on clinical trials published in journals indexed in the PubMed and Web of Science databases. Two searches were carried out, starting with the association (and) of the health term "vitamin D" with "pregnancy". Read More

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Breast imaging hindered during covid-19 pandemic, in Brazil.

Rev Saude Publica 2021 10;55. Epub 2021 May 10.

Hospital São Luiz. Matter Group Assistência Médica. São Paulo, SP, Brasil.

Objective: To report the decrease in breast imaging after covid-19 pandemic, obtaining the number of mammograms performed in 2019 and 2020. Additionally, to investigate if there was an increase in the proportion of women undergoing mammography for diagnostic purposes, with palpable lesions.

Method: This is a cross-sectional study, based on the number of mammograms performed by the Brazilian public health services, provided by DATASUS, an open access database. Read More

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Effect of electron-phonon coupling on the transport properties of monolayers of ZrS, BiI and PbI: a thermoelectric perspective.

Phys Chem Chem Phys 2021 May 12. Epub 2021 May 12.

Department of Physics, Indian Institute of Science Education and Research, Pune, Maharashtra 411008, India. and Centre for Energy Sciences, Indian Institute of Science Education and Research, Pune, Maharashtra 411008, India.

Thermoelectric materials are used for the conversion of waste heat to electrical energy. The transport coefficients that determine their thermoelectric properties depend on the band structure and the relaxation time of the charge carriers. Both of these are significantly affected by electron-phonon coupling. Read More

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Mechanisms of methyl formate production during electron-induced processing of methanol-carbon monoxide ices.

Phys Chem Chem Phys 2021 May 12. Epub 2021 May 12.

Universität Bremen, Fachbereich 2 (Chemie/Biologie), Institut für Angewandte und Physikalische Chemie, Leobener Straße 5, D-28359 Bremen, Germany.

The formation of methyl formate (CH3OCHO) upon electron irradiation of mixed ices of carbon monoxide (CO) and methanol (CH3OH) has been monitored by post-irradiation thermal desorption spectrometry (TDS). The energy dependence of the product yields obtained with electron energies between 3 and 18 eV was studied. These energies are characteristic of secondary electrons that are released in vast numbers under the effect of ionizing radiation. Read More

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