64,092 results match your criteria characteristics papers


Virulence properties and pathogenicity of multidrug-resistant Vibrio harveyi associated with luminescent vibriosis in pacific white shrimp, Penaeus vannamei.

J Invertebr Pathol 2021 Apr 17:107594. Epub 2021 Apr 17.

Faculty of Fisheries and Food Science, Universiti Malaysia Terengganu, 21030 Kuala Nerus, Terengganu, Malaysia. Electronic address:

Global high demand for pacific white shrimp Penaeus vannamei has led to intensified cultivation and a wide range of disease problems, including bacterial diseases due to vibrios. Three presumptive luminescent Vibrio harveyi strains (Vh5, Vh8 and Vh10) were isolated from the hepatopancreas (Vh5) and haemolymph (Vh8 and Vh10) of diseased growout pacific white shrimp from a farm in Setiu, Terengganu, Malaysia, using Vibrio harveyi agar (VHA) differential medium. All three strains were identified as V. Read More

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β-elemonic acid inhibits growth and triggers apoptosis in human castration-resistant prostate cancer cells through the suppression of JAK2/STAT3/MCL-1 and NF-ĸB signal pathways.

Chem Biol Interact 2021 Apr 17:109477. Epub 2021 Apr 17.

School of Pharmaceutical Sciences, Nanjing Tech University, Nanjing 210009, People's Republic of China. Electronic address:

Castration-resistant prostate cancer (CRPC) has become a significant problem in the current treatment of prostate cancer (PCa) with the characteristics of high metastatic potential, resistance and easy recurrence. The abnormal activation of JAK2/STAT3/MCL-1 and NF-κB has been confirmed as the main reason for the development of CRPC. We previously found that β-elemonic acid (β-EA) as a natural triterpene has potential anti-inflammatory and anti-osteosarcoma effects with lower toxicity. Read More

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Proapoptotic and proautophagic activity of 20-hydroxyecdysone in breast cancer cells in vitro.

Chem Biol Interact 2021 Apr 17:109479. Epub 2021 Apr 17.

Department of Clinical Chemistry and Molecular Diagnostics, Poznan University of Medical Sciences, Przybyszewskiego Str 49, 60-355, Poznan, Poland.

The present study was designed to identify the biological activity of three ecdysones, i.e., 20-hydroxyecdysone (20-HE), ajugasterone C, and polypodine B isolated from Serratula coronata. Read More

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Responsible product design to mitigate excessive gambling: A scoping review and z-curve analysis of replicability.

PLoS One 2021 20;16(4):e0249926. Epub 2021 Apr 20.

Division on Addiction Cambridge Health Alliance, A Harvard Medical School Teaching Hospital, Malden, MA, United States of America.

Objectives: Systematic mapping of evaluations of tools and interventions that are intended to mitigate risks for gambling harm.

Design: Scoping Review and z-curve analysis (which estimates the average replicability of a body of literature).

Search Strategy: We searched 7 databases. Read More

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Clustered embedding using deep learning to analyze urban mobility based on complex transportation data.

PLoS One 2021 20;16(4):e0249318. Epub 2021 Apr 20.

Department of Computer Science, Yonsei University, Seoul, South Korea.

Urban mobility is a vital aspect of any city and often influences its physical shape as well as its level of economic and social development. A thorough analysis of mobility patterns in urban areas can provide various benefits, such as the prediction of traffic flow and public transportation usage. In particular, based on its exceptional ability to extract patterns from complex large-scale data, embedding based on deep learning is a promising method for analyzing the mobility patterns of urban residents. Read More

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An experimental assessment on the influence of high fuel injection pressure with ternary fuel (diesel-mahua methyl ester-pentanol) on performance, combustion, and emission characteristics of common rail direct injection diesel engine.

Environ Sci Pollut Res Int 2021 Apr 19. Epub 2021 Apr 19.

Department of Mechanical Engineering, GITAM University, Hyderabad, India.

Optimization of fuel injection strategies can maximize the utilization of ternary fuel by addressing the issues concerning fuel consumption, engine performance, and exhaust gas emission. In the midst of the pervasiveness of plant-based biofuel, this paper focused on maximizing the mahua oil biodiesel usage in a diesel engine having a common rail direct injection (CRDI) system without any engine modifications. The crude oil extracted from the seeds of Madhuca longifolia is known in India as mahua butter and has shown impressive fuel properties such as lower viscosity, flashpoint, boiling point, and comparable calorific value to diesel. Read More

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Co-authorship network analysis of Iranian researchers on osteoporosis.

Arch Osteoporos 2021 Apr 20;16(1):74. Epub 2021 Apr 20.

Osteoporosis Research Center, Endocrinology and Metabolism Clinical Sciences Institute, Tehran University of Medical Sciences, No. 10, Jalale-al-Ahmad Ave., Tehran, Iran.

Our purpose was to investigate the co-authorship network of Iranian researchers in the field of osteoporosis. We used 1328 documents retrieved from databases of PubMed, Scopus, and Web of Science in the analysis. The network had 183 authors in 13 clusters, low cohesion, and slow information flow between its members. Read More

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Lewis acidic zinc(II) salen-type Schiff-base complexes: sensing properties and responsive nanostructures.

Authors:
Santo Di Bella

Dalton Trans 2021 Apr 20. Epub 2021 Apr 20.

Dipartimento di Scienze Chimiche, Università di Catania, I-95125 Catania, Italy.

In this frontier article some peculiar characteristics of Zn(salen)-type Schiff-base complexes are reviewed. The paper is mainly focused on the most recent and relevant achievements on responsive supramolecular nanostructures and sensing properties, both of them related to the Lewis acidic character of the ZnII centre in these molecular species, providing an interpretation of these features. The sensing properties of Zn(salen)-type complexes mainly originate from optical spectroscopic changes associated with the formation of the adducts upon addition of a Lewis base (analyte), either by deaggregation of dimeric species or displacement of the solvent coordinated to the metal centre. Read More

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Dual-demodulation large-scope high-sensitivity refractive index sensor based on twin-core PCF.

Optoelectron Lett 2021 14;17(4):193-198. Epub 2021 Apr 14.

The Key Laboratory of Computer Vision and System of Ministry of Education, Tianjin Key Laboratory of Intelligence Computing and Novel Software Technology, Tianjin University of Technology, Tianjin, 300384 China.

In this paper, a refractive index (RI) sensor based on the twin-core photonic crystal fiber (TC-PCF) is presented. Introducing the rectangular array in the core area makes the PCF possible to obtain high birefringence and low confinement loss over the wavelength range from 0.6 µm to 1. Read More

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Artificial intelligence (AI) for medical imaging to combat coronavirus disease (COVID-19): a detailed review with direction for future research.

Artif Intell Rev 2021 Apr 15:1-31. Epub 2021 Apr 15.

Discipline of Business Analytics in Business School, The University of Sydney, Sydney, Australia.

Since early 2020, the whole world has been facing the deadly and highly contagious disease named coronavirus disease (COVID-19) and the World Health Organization declared the pandemic on 11 March 2020. Over 23 million positive cases of COVID-19 have been reported till late August 2020. Medical images such as chest X-rays and Computed Tomography scans are becoming one of the main leading clinical diagnosis tools in fighting against COVID-19, underpinned by Artificial Intelligence based techniques, resulting in rapid decision-making in saving lives. Read More

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Morphometric analysis of spike-wave complexes (SWCs) causing myoclonic seizures in children with idiopathic myoclonic epilepsies - A positive SWC component correlates with myoclonic intensity.

Brain Dev 2021 Apr 16. Epub 2021 Apr 16.

Department of Pediatrics, Tokyo Women's Medical University, 8-1 Kawada-Cho, Shinjuku-cu, Tokyo 162-8666, Japan.

Aim: To elucidate the morphological characteristics of spike-wave complexes (SWCs) causing myoclonic seizures (MS) in childhood-onset idiopathic myoclonic epilepsies.

Subjects And Methods: The subjects were 8 patients, including 4 with epilepsy with myoclonic-atonic seizures (EMAS), 3 with myoclonic epilepsy in infancy (MEI) and 1 with idiopathic unclassifiable myoclonic epilepsy. Morphometric parameters of the SWCs were compared between those with MS [SWC-MS (+)] and those without MS [SWC-MS (-)], and a correlation coefficient analysis was performed between the SWC parameters and the duration of myoclonic electromyogram (EMG) potentials. Read More

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Astragalus-mediated stimulation on antigen-presenting cells could result in higher IL-21 production from CXCR5 Tfh-like cells and better IL-21-mediated effector functions.

Hum Immunol 2021 Apr 16. Epub 2021 Apr 16.

Department of Special Clinic, Changhai Hospital, Naval Military Medical University, Shanghai, China. Electronic address:

T cells in renal cell carcinoma (RCC) patients display multiple features of impairment and exhaustion. Here, we hypothesize that Astragalus membranaceus, a herbal medicine commonly used to accompany chemotherapy, might have adjuvating effects on T cells from RCC patients. To investigate this, circulating T cells from healthy individuals and RCC patients were cocultured ex vivo with aqueous extract from Astragalus. Read More

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Effect of Different Iron Sources on Growth of Zeolitic Imidazolate Frameworks-8: For Efficient Oxygen Reduction Electrocatalysts.

J Nanosci Nanotechnol 2021 Oct;21(10):5319-5328

Shanghai Key Laboratory of Materials Protection and Advanced Materials in Electric Power, Shanghai University of Electric Power, Shanghai 200090, China.

Transition metal and nitrogen co-doped carbon-based catalysts (TM-N-C) have become the most promising catalysts for Pt/C due to their wide range of sources, low cost, high catalytic activity, excellent stability and strong resistance to poisoning, especially Fe-N-C metal-organic frameworks (MOFs), which are some of the most promising precursors for the preparation of Fe-N-C catalysts due to their inherent properties, such as their highly ordered three-dimensional framework structure, controlled porosity, and tuneable chemistry. Based on these, in this paper, different iron sources were added to synthesis a sort of zeolitic imidazole frameworks (ZIF-8). Then the imidazole salt in ZIF-8 was rearranged into high N-doped carbon by high-temperature pyrolysis to prepare the Fe-N-C catalyst. Read More

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October 2021

Physical Stability, Rheology, Thermal Conductivity and Optical and Corrosion Properties of a Graphene Quantum Dot Fluid.

J Nanosci Nanotechnol 2021 Oct;21(10):5312-5318

College of Mechanical and Energy Engineering, Tongji University, 200092, China.

Because of their unique and tunable photoluminescence properties, exceptional physicochemical properties, high photostability, biocompatibility and small size, Graphene quantum dots (GQDs) have received a lot of attention. However, insufficient investigations have been carried out on GQD fluids. In this paper, the properties of a prepared GQD fluid are studied experimentally, involving the physical stability, rheology, thermal conductivity, optical properties and corrosion characteristics. Read More

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October 2021

Immobilization of pectin, xyloglucan and other soluble plant polysaccharides on blotting membranes.

New Phytol 1993 Dec;125(4):695-706

University of Edinburgh, Science Faculty Electron Microscope Facility, Daniel Rutherford Building, The King's Buildings, Mayfield Road, Edinburgh EH9 3JH, U.K.

Soluble polysaccharides, of natural and synthetic origins, are immobilized by nylon, nitrocellulose, and polyvinylidene difluoride blotting membranes. Retention of an acid and a neutral polysaccharide, measured using radioactive pectin and xyloglucan-rich hemicellulose, exceeded 90% on some blotting membranes eluted in aqueous media. The two polysaccharides displayed different binding characteristics. Read More

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December 1993

Influence of the host on three sub-Arctic annual facultative root hemiparasites: II. Gas exchange characteristics and resource use-efficiency.

Authors:
W E Seel M C Press

New Phytol 1994 May;127(1):37-44

School of Biological Sciences, Williamson Building University of Manchester, Oxford Road, Manchester, M13 9PL, UK.

Light saturated rates of photosynthesis (A ), water use-efficiency (WUE) and photosynthetic nitrogen use-efficiency (PNUE) were measured for three sub-Arctic annual root hemiparasites (Rhinanthus minor L., Euphrasia frigida L. and Melampyrum sylvaticum L. Read More

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Embedded 3D printing of multi-layer, self-oscillating vocal fold models.

J Biomech 2021 Mar 20;121:110388. Epub 2021 Mar 20.

Department of Mechanical Engineering, Brigham Young University, Provo, UT 84602, USA. Electronic address:

The biomechanics of human voice production are commonly studied using benchtop silicone vocal fold models that mimic the vibration of their in vivo counterparts. These models often have multiple layers of differing stiffness that represent human vocal fold tissue layers and are fabricated using a multi-step casting process. The purpose of the present study is to introduce and demonstrate a process for fabricating functional multi-layer vocal fold models using an alternative approach, termed embedded 3D printing, that is a hybrid of casting and 3D printing. Read More

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Eco-friendly rice husk pre-treatment for preparing biogenic silica: Gluconic acid and citric acid comparative study.

Chemosphere 2021 Apr 9;279:130541. Epub 2021 Apr 9.

Graduate Institute of Environmental Engineering, National Central University, No. 300, Chung-Da Road., Chung-Li District, Tao-Yuan City, 32001, Taiwan. Electronic address:

Carboxylic acid leaching has been established eco-friendly pre-treatment method for producing biogenic silica (BSi) from rice husk. The most urgent issue is for carboxylic acid to promote new readily biodegradable acids and enhance carboxylic acid sustainability in BSi preparation. This research investigates gluconic acid (GA) applicability for biogenic silica preparation from rice husk compared with citric acid (CA). Read More

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Gene expression profiling of α-gustducin-expressing taste cells in mouse fungiform and circumvallate papillae.

Biochem Biophys Res Commun 2021 Apr 16;557:206-212. Epub 2021 Apr 16.

Section of Oral Neuroscience, Graduate School of Dental Science, Kyushu University, 3-1-1, Maidashi, Higashi-ku, Fukuoka-city, Fukuoka, 812-8582, Japan; Research and Development Center for Five-Sense Devices Taste and Odor Sensing, Kyushu University, 744, Nishi-ku, Fukuoka-city, Fukuoka, 819-0395, Japan. Electronic address:

Taste buds are complex sensory organs embedded in the epithelium of fungiform papillae (FP) and circumvallate papillae (CV). The sweet, bitter, and umami tastes are sensed by type II taste cells that express taste receptors (Tas1rs and Tas2rs) coupled with the taste G-protein α-gustducin. Recent studies revealed that the taste response profiles of α-gustducin-expressing cells are different between FP and CV, but which genes could generate such distinctive cell characteristics are still largely unknown. Read More

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Bio-nanocomposites of graphene with biopolymers; fabrication, properties, and applications.

Adv Colloid Interface Sci 2021 Apr 16;292:102416. Epub 2021 Apr 16.

Department of Food Materials and Process Design Engineering, Gorgan University of Agricultural Science and Natural Resources, Gorgan, Iran. Electronic address:

The unique properties of graphene and graphene oxide (GO) nanocomposites make them suitable for a wide range of medical, industrial, and agricultural applications. The addition of graphene or GO to a polymeric matrix can ameliorate its thermo-mechanical, electrical, and barrier characteristics. The present paper reviews the literature on graphene/GO-based bio-nanocomposites and examines the various fabrication methods, such as chemical vapor deposition, chemical synthesis, microwave synthesis, the solvothermal method, molecular beam epitaxy, and colloidal suspension. Read More

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Comparative genomic analysis of the genus Novosphingobium and the description of two novel species Novosphingobium aerophilum sp. nov. and Novosphingobium jiangmenense sp. nov.

Syst Appl Microbiol 2021 Mar 30;44(3):126202. Epub 2021 Mar 30.

Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, State Key Laboratory of Applied Microbiology Southern China, Guangdong Open Laboratory of Applied Microbiology, Guangdong Microbial Culture Collection Center (GDMCC), Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou 510070, P.R. China. Electronic address:

Members of the genus Novosphingobium are well known for their metabolically versatile and great application potential in pollution elimination. The three novel bacterial strains, designated 4Y4, 4Y9, and 1Y9A, were isolated from aquaculture water and characterized by using a polyphasic taxonomic approach. The 16S rRNA gene sequences phylogenetic analysis revealed that the three strains belonged to the genus Novosphingobium. Read More

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Stereoelectroencephalography-guided radiofrequency thermocoagulation for hypothalamic hamartoma: Electroclinical patterns and the relationship with surgical prognosis.

Epilepsy Behav 2021 Apr 16;118:107957. Epub 2021 Apr 16.

Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing, China; Department of Stereotactic and Functional Neurosurgery, Beijing Neurosurgical Institute, Beijing, China. Electronic address:

Background: Radiofrequency thermocoagulation (RFTC) guided by stereo-electroencephalography (SEEG) has been proved to be a safe method to reduce seizure frequency in patients with drug-resistant epilepsy. However, there are few reports addressing the value and safety of this procedure in hypothalamic hamartoma (HH).

Objective: To present the results of our experience using SEEG-guided RFTC in HH patients with drug-resistant epilepsy, and identify outcome predictors. Read More

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Assessing variability in the ratio of metal concentrations measured by DGT-type passive samplers and spot sampling in European seawaters.

Sci Total Environ 2021 Apr 9;783:147001. Epub 2021 Apr 9.

Lancaster University, Lancaster Environment Centre, Lancaster LA1 4YQ, United Kingdom.

The current study evaluates the effect of seawater physico-chemical characteristics on the relationship between the concentration of metals measured by Diffusive Gradients in Thin films (DGT) passive samplers (i.e., DGT-labile concentration) and the concentrations measured in discrete water samples. Read More

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A Systematic Review of the Social Network Strategy to Optimize HIV Testing in Key Populations to End the Epidemic in the United States.

AIDS Behav 2021 Apr 19. Epub 2021 Apr 19.

Center for Learning and Innovation, San Francisco Department of Public Health, 25 Van Ness, Suite 500, San Francisco, CA, 94102, USA.

The United States (U.S.) has a plan to end the HIV epidemic by 2030. Read More

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Effects of turbulence fluctuation intensity in bioreactor of sewage treatment on physical and chemical properties of biofilms.

Bioprocess Biosyst Eng 2021 Apr 19. Epub 2021 Apr 19.

Key Laboratory of Education Ministry of the Three Gorges Reservoir Region's Eco-Environment, Chongqing University, Chongqing, 400045, China.

The flow velocity plays an important role in the growth and characteristics of biofilm in the bioreactor as well as its treatment efficiency, which has been a hot research topic. In a sewage treatment bioreactor, the type of flow is usually turbulence. According to the methods of Reynolds decomposition, the flow velocity of turbulence consists of the time-mean velocity and fluctuation velocity, which usually exist simultaneously in real flow. Read More

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Echogenic Surface Enhancements for Improving Needle Visualization in Ultrasound: A PRISMA Systematic Review.

J Ultrasound Med 2021 Apr 18. Epub 2021 Apr 18.

Gastrounit, Herlev University Hospital, Herlev, Denmark.

Optimal visualization of needles in clinical ultrasound imaging is important and challenging, especially at steep angles. Improvement of visualization has been attempted with various techniques, for example, coatings and dimples. This systematic review summarizes enhancement techniques and identifies superior echogenic surface enhancements. Read More

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Test and vaccinate or remove: Methodology and preliminary results from a badger intervention research project.

Vet Rec 2021 Apr 19:e248. Epub 2021 Apr 19.

Enzootic Diseases and Animal Welfare Division, Department of Agriculture, Environment and Rural Affairs, Belfast, Northern Ireland, UK.

Background: In the British Isles, it is generally accepted that the Eurasian badger (Meles meles) plays a role in the maintenance of bovine tuberculosis (bTB) in cattle. Non-selective culling is the main intervention method deployed in controlling bTB in badgers along with smaller scale Bacillus Calmette-Guérin (BCG) vaccination areas. This paper describes the use of selective badger culling combined with vaccination in a research intervention trial. Read More

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Mental health services in primary care: Evidence for the feasibility of telehealth during the COVID-19 pandemic.

J Affect Disord Rep 2021 Apr 14:100146. Epub 2021 Apr 14.

Brown University Warren Alpert Medical School, Providence, RI United States.

Background: : This study examined the transition to telehealth services during the COVID-19 pandemic in terms of attendance rates, the provision of evidence-based interventions, and clinical outcomes.

Methods: : The feasibility of in-person versus telehealth visits for integrated primary care sessions was compared using chart review data. Data on patient characteristics, attendance, symptom severity and improvement, and evidence-based intervention use were collected for patients (N =173) from an integrated primary clinic that primarily serves a low-income, diverse sample of adults and children whose primary presenting problems are depression and anxiety. Read More

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What Constitutes Authorship in the Social Sciences?

Authors:
Gernot Pruschak

Front Res Metr Anal 2021 23;6:655350. Epub 2021 Mar 23.

Department for Business Decisions and Analytics, University of Vienna, Vienna, Austria.

Authorship represents a highly discussed topic in nowadays academia. The share of co-authored papers has increased substantially in recent years allowing scientists to specialize and focus on specific tasks. Arising from this, social scientific literature has especially discussed author orders and the distribution of publication and citation credits among co-authors in depth. Read More

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"," Mapping the 25 Year Evolution and Impact of North American Vascular Biology Organization Science Through Publications of its Founding and Current Members.

Front Res Metr Anal 2020 12;5:591090. Epub 2020 Nov 12.

Cyberinfrastructure for Network Science Center, Luddy School of Informatics, Computing, and Engineering, Indiana University, Bloomington, IN, United States.

Scholarly organizations bring together experts to move forward specific areas of scientific endeavor. More than 5,000 scholarly societies exist world-wide yet little is known about the composition, evolution, and collaboration of experts within these organizations. This study presents general methods to study the evolution of a biomedical organization and its impact over time. Read More

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November 2020