2,048 results match your criteria connectors

Manipulating the soil microbiomes during a community recovery process with plant beneficial species for the suppression of Fusarium wilt of watermelon.

AMB Express 2021 Jun 12;11(1):87. Epub 2021 Jun 12.

Jiangsu Provincial Key Lab for Solid Organic Waste Utilization, National Engineering Research Center for Organic-Based Fertilizers, Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization, Nanjing Agricultural University, Nanjing, 210095, China.

Fusarium wilt is a devastating disease which impacts watermelon production. Soil fumigation using dazomet followed by biological organic fertilizer was applied to suppress the Fusarium wilt disease. We propose that fumigation suppresses the soil indigenous community, especially the soil-borne pathogens, while the utilization of bio-organic fertilizer facilitates the recovery of the soil microbiome to a beneficial, suppressive state through the introduction of plant growth-promoting microorganisms. Read More

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Long-term observation of periodontal condition following placement of removable partial dentures with rigid retainers and major connector in patients with/without diabetes: A retrospective study.

J Prosthodont Res 2021 Jun 10. Epub 2021 Jun 10.

Department of Removable Partial Prosthodontics, Graduate School, Tokyo Medical and Dental University (TMDU), Tokyo.

Purpose: This retrospective study evaluated the periodontal tissues of the abutment teeth of removable partial dentures (RPDs) with rigid retainers and major connectors in patients with and without type 2 diabetes mellitus (T2D).

Methods: A total of 313 patients who had been treated with RPDs, including rigid retainers and major connectors, were divided into two groups: T2D and non-T2D. The periodontal parameters and radiographic bone heights of the abutment teeth were evaluated at baseline and at a 5-year examination during supportive periodontal therapy (SPT). Read More

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Molecular diffusion analysis of dynamic blood flow and plasma separation driven by self-powered microfluidic devices.

Biomicrofluidics 2021 May 21;15(3):034106. Epub 2021 May 21.

Department of Physics, North Dakota State University, Fargo, North Dakota 58108, USA.

Integration of microfluidic devices with pressure-driven, self-powered fluid flow propulsion methods has provided a very effective solution for on-chip, droplet blood testing applications. However, precise understanding of the physical process governing fluid dynamics in polydimethylsiloxane (PDMS)-based microfluidic devices remains unclear. Here, we propose a pressure-driven diffusion model using Fick's law and the ideal gas law, the results of which agree well with the experimental fluid dynamics observed in our vacuum pocket-assisted, self-powered microfluidic devices. Read More

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On-Line Remaining Useful Life Estimation of Power Connectors Focused on Predictive Maintenance.

Sensors (Basel) 2021 May 27;21(11). Epub 2021 May 27.

Electronics Engineering Department, Universitat Politècnica de Catalunya, 08222 Terrassa, Spain.

Connections are critical elements in power systems, exhibiting higher failure probability. Power connectors are considered secondary simple devices in power systems despite their key role, since a failure in one such element can lead to major issues. Thus, it is of vital interest to develop predictive maintenance approaches to minimize these issues. Read More

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Experimental Study on Timber-Lightweight Concrete Composite Beams with Ductile Bolt Connectors.

Materials (Basel) 2021 May 18;14(10). Epub 2021 May 18.

College of Civil Engineering, Nanjing Forestry University, Nanjing 210037, China.

A timber-lightweight-concrete (TLC) composite beam connected with a ductile connector in which the ductile connector is made of a stainless-steel bolt anchored with nuts at both ends was proposed. The push-out results and bending performance of the TLC composite specimens were investigated by experimental testing. The push-out results of the shear specimens show that shear-slip curves exhibit good ductility and that their failure can be attributed to bolt buckling accompanied by lightweight concrete cracking. Read More

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Experimental Investigation on the Static Performance of Stud Connectors in Steel-HSFRC Composite Beams.

Materials (Basel) 2021 May 22;14(11). Epub 2021 May 22.

State Key Laboratory of Mechanical Behaviour and System Safety of Traffic Engineering Structures, Shijiazhuang Tiedao University, Shijiazhuang 050043, China.

In this research, high strength fiber reinforced concrete (HSFRC) was used to replace the normal strength concrete (NSC) in steel-concrete composite beams to improve their working performance, which might change the static performance of stud connectors. Firstly, push-out tests were conducted to investigation on the static performance of stud connectors in steel-HSFRC composite beams and compared with steel-NSC composite beams. Studs of 8 sizes, 13 mm, 16 mm, 19 mm and 22 mm in diameter and 80 mm and 120 mm in height were adopted to study the influence of stud dimension. Read More

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Design of Kinematic Connectors for Microstructured Materials Produced by Additive Manufacturing.

Polymers (Basel) 2021 May 6;13(9). Epub 2021 May 6.

Institute for Polymers and Composites-IPC, School of Engineering, University of Minho, 4800-058 Guimarães, Portugal.

The main characteristic of materials with a functional gradient is the progressive composition or the structure variation across its geometry. This results in the properties variation in one or more specific directions, according to the functional application requirements. Cellular structure flexibility in tailoring properties is employed frequently to design functionally-graded materials. Read More

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Sensing Applications in Aircrafts Using Polymer Optical Fibres.

Sensors (Basel) 2021 May 21;21(11). Epub 2021 May 21.

Electronics Technology Department, Universidad Carlos III de Madrid, E-28911 Leganés, Spain.

We report on recent advances in the use of inexpensive polymer optical fibres (POFs) for sensing applications in avionics. The sensors analysed in this manuscript take advantage of the unique properties of polymers, such as high flexibility, elasticity, and sensitivity, and they range from strain, elongation, and vibration interrogators to level and temperature meters, leading to cost-effective techniques for structural health monitoring in aircraft structures. We also highlight recent power-supply methods using Power-over-POF in order to feed sensors remotely, and we discuss the constraints imposed by connectors on the performance of POF networks in aircrafts. Read More

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Microbial co-occurrence network and its key microorganisms in soil with permanent application of composted tannery sludge.

Sci Total Environ 2021 May 23;789:147945. Epub 2021 May 23.

Department of Agricultural Engineering and Soil Science, Federal University of Piauí, Brazil. Electronic address:

Soil microbial communities act on important environmental processes, being sensitive to the application of wastes, mainly those potential contaminants, such as tannery sludge. Due to the microbiome complexity, graph-theoretical approaches have been applied to represent model microbial communities interactions and identify important taxa, mainly in contaminated soils. Herein, we performed network and statistical analyses into microbial 16S rRNA gene sequencing data from soil samples with the application of different levels of composted tannery sludge (CTS) to assess the most connected nodes and the nodes that act as bridges to identify key microbes within each community. Read More

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Investigating the Microchannel Architectures Inside the Subchondral Bone in Relation to Estimated Hip Reaction Forces on the Human Femoral Head.

Calcif Tissue Int 2021 May 22. Epub 2021 May 22.

Department of Trauma Surgery, Orthopaedic Surgery and Plastic Surgery, University Medical Center Göttingen, Göttingen, Germany.

The interplay between articular cartilage (AC) and subchondral bone (SB) plays a pivotal role in cartilage homeostasis and functionality. As direct connective pathways between the two are poorly understood, we examined the location-dependent characteristics of the 3D microchannel network within the SB that connects the basal cartilage layer to the bone marrow (i.e. Read More

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Numerical modeling of bare and polymer-covered braided stents using torsional and tensile springs connectors.

J Biomech 2021 Apr 27;123:110459. Epub 2021 Apr 27.

Centre Internacional de Métodes Numérics en Enginerya, CIMNE, Barcelona, Spain; Universitat Politécnica de Catalunya, UPC, Barcelona, Spain.

Computational modeling of braided stents using the finite element (FE) method has become an essential tool in the design and development of these medical devices. One of the most challenging issues in such a task is representing in an accurate manner the interaction between the interlacing wires. With the goal of achieving a compromise between accuracy and computational affordability, we propose a new approach consisting in using 1D FE formulations equipped with torsional springs at the crossover points of the wires. Read More

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Cobalt-based metal-organic frameworks for the photocatalytic reduction of carbon dioxide.

Nanoscale 2021 May;13(20):9075-9090

Anhui Province Key Laboratory of Wetland Ecosystem Protection and Restoration, School of Resource and Environmental Engineering, Anhui University, Hefei 230601, China.

Metal-organic frameworks (MOFs) are porous materials composed of metal centers and organic connectors. They are formed by complexation reactions and exhibit characteristics of both polymers and coordination compounds. They exhibit numerous advantageous features, including a large specific surface area, adjustable pore size/shape, and modifiable pore wall functional groups. Read More

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Structure elucidation of the elusive Enzyme I monomer reveals the molecular mechanisms linking oligomerization and enzymatic activity.

Proc Natl Acad Sci U S A 2021 May;118(20)

Department of Chemistry, Iowa State University, Ames, IA 50011;

Enzyme I (EI) is a phosphotransferase enzyme responsible for converting phosphoenolpyruvate (PEP) into pyruvate. This reaction initiates a five-step phosphorylation cascade in the bacterial phosphotransferase (PTS) transduction pathway. Under physiological conditions, EI exists in an equilibrium between a functional dimer and an inactive monomer. Read More

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The lure of the Lüer connector: Non-Lüer connectors in regional anaesthesia.

Acta Anaesthesiol Scand 2021 May 8. Epub 2021 May 8.

Department of Anaesthesia and Perioperative Medicine, Royal Brisbane and Women's Hospital, The University of Queensland, Brisbane, QLD, Australia.

Health service professionals do not have perfect vigilance. There will always be the possibility that a serious untoward incident can occur due to crossover injections of medication being administered via the wrong route. The universality of the Lüer connector made it very easy to connect several medical devices for different therapeutic uses. Read More

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Diversity patterns and drivers of soil microbial communities in urban and suburban park soils of Shanghai, China.

PeerJ 2021 15;9:e11231. Epub 2021 Apr 15.

Key Laboratory of National Forestry and Grassland Administration on Ecological Landscaping of Challenging Urban Sites, Shanghai Academy of Landscape Architecture Science and Planning, Shanghai, China.

Background: The rapid expansion of urbanization leads to significant losses of soil ecological functions. Microbes directly participate in key soil processes and play crucial roles in maintaining soil functions. However, we still have a limited understanding of underlying mechanisms shaping microbial communities and the interactions among microbial taxa in park soils. Read More

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Evaluating a Novel Hemodialysis Central Venous Catheter Cap in Reducing Bloodstream Infections: A Quality Improvement Initiative.

Int J Nephrol Renovasc Dis 2021 28;14:125-131. Epub 2021 Apr 28.

Clinical Research, Mattoo & Bhat Medical Associates, P.C., College Point, New York, USA.

Purpose: Central line-associated bloodstream infection (CLABSI) is the second leading cause of death in hemodialysis patients. Patients dialyzed via central venous catheters (CVCs) are more susceptible to vascular access-related bloodstream infection (VRBSI), sepsis, and mortality when compared to patients with other dialysis accesses.

Patients And Methods: A retrospective observational data analysis was conducted from 13 outpatient dialysis clinics in the United States to compare novel chlorhexidine-coated end caps to standard needlefree connectors for differences in CLABSI rates when utilizing CVCs for hemodialysis. Read More

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Progressive Cellular Architecture in Microscale Gas Chromatography for Broad Chemical Analyses.

Sensors (Basel) 2021 Apr 29;21(9). Epub 2021 Apr 29.

Center for Wireless Integrated MicroSensing and Systems (WIMS2), University of Michigan, Ann Arbor, MI 48109, USA.

Gas chromatography is widely used to identify and quantify volatile organic compounds for applications ranging from environmental monitoring to homeland security. We investigate a new architecture for microfabricated gas chromatography systems that can significantly improve the range, speed, and efficiency of such systems. By using a cellular approach, it performs a partial separation of analytes even as the sampling is being performed. Read More

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Effects of Co Addition on the Microstructure and Properties of Elastic Cu-Ni-Si-Based Alloys for Electrical Connectors.

Materials (Basel) 2021 Apr 16;14(8). Epub 2021 Apr 16.

State Key Laboratory of Nonferrous Metals and Processes, GRIMAT Group Co., Ltd., Beijing 100088, China.

The properties and microstructure evolution of quaternary Cu-Ni-Co-Si alloys with different Ni/Co mass ratios were investigated. The microstructure and morphological characteristics of the precipitates were analyzed by using electron backscatter diffraction (EBSD), transmission electron microscopy (TEM) and high-resolution transmission electron microscopy (HRTEM). The mechanical properties and conductivity of the alloys were significantly improved after the addition of Co. Read More

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Hybrid Multisite Silicon Neural Probe with Integrated Flexible Connector for Interchangeable Packaging.

Sensors (Basel) 2021 Apr 8;21(8). Epub 2021 Apr 8.

Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, 4710-057 Braga, Portugal.

Multisite neural probes are a fundamental tool to study brain function. Hybrid silicon/polymer neural probes combine rigid silicon and flexible polymer parts into one single device and allow, for example, the precise integration of complex probe geometries, such as multishank designs, with flexible biocompatible cabling. Despite these advantages and benefiting from highly reproducible fabrication methods on both silicon and polymer substrates, they have not been widely available. Read More

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TetrODrive: an open-source microdrive for combined electrophysiology and optophysiology.

J Neural Eng 2021 04 26;18(4). Epub 2021 Apr 26.

Systems Physiology of Learning, Leibniz Institute for Neurobiology, Magdeburg, Germany.

. In tetrode recordings, the cell types of the recorded units are difficult to determine based on electrophysiological characteristics alone. Optotagging, the use of optogenetic stimulation to precisely identify cells, is a method to overcome this challenge. Read More

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[Advances in computer aided design and computer aided manufacturing of removable partial denture].

Zhonghua Kou Qiang Yi Xue Za Zhi 2021 May 9;56(5):485-490. Epub 2021 May 9.

Center of Digital Dentistry, Faculty of Prosthodontics, Peking University School and Hospital of Stomatology & National Center of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Laboratory for Digital and Material Technology of Stomatology & Research Center of Engineering and Technology for Computerized Dentistry Ministry of Health & Beijing Key Laboratory of Digital Stomatology, Beijing 100081, China.

Computer aided design, numerically controlled milling, additive manufacturing and other digital technologies have been widely used in clinical practice of prosthodontics. The application of these technologies not only changed the design and manufacturing workflow of removable partial denture (RPD), but also improved the production efficiency of dentures, and changed the design and manufacturing concept of dentures. A large number of researches on computer aided design and computer aided manufacturing (CAD/CAM) of RPD have emerged in recent years, including researches on the properties of selective laser melting metal powder and other new dental materials, the innovative design of retainers, connectors, artificial teeth and other denture components, high precision manufacturing of the RPD framework, denture base and artificial teeth, quantitative laboratory evaluations of the accuracy, adaption and mechanical properties of RPD with new structures and made of new materials, clinical evaluations of RPD and others. Read More

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Iliac Screw Fixation Revisited: Improved Clinical and Radiologic Outcomes Using a Modified Iliac Screw Fixation Technique.

Clin Spine Surg 2021 Apr 23. Epub 2021 Apr 23.

Swedish Neuroscience Institute, Swedish Medical Center Seattle Science Foundation, Seattle, WA Department of Trauma Surgery, BG University Hospital Bergmannsheil, Ruhr University Bochum, Bochum, Germany Hansjörg Wyss Hip and Pelvic Center, Swedish Hospital, Seattle, WA Riverside University Health System Medical Center, Moreno Valley, CA Department of Neurosurgery, Heidelberg University Hospital, Heidelberg, Germany Spectrum Research Inc, Tacoma, WA.

Study Design: A retrospective study.

Objective: To describe the modified iliac screw (mILS) technique and compare it to other spinopelvic fixation techniques in terms of wound healing complications, hardware prominence, and failure.

Summary Of Background Data: The traditional entry point of an iliac screw often causes postoperative gluteal pain from the prominent screw head. Read More

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Design, synthesis and evaluation of cholinesterase hybrid inhibitors using a natural steroidal alkaloid as precursor.

Bioorg Chem 2021 Jun 8;111:104893. Epub 2021 Apr 8.

IMBIV-CONICET, Departamento de Química Orgánica, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Ciudad Universitaria, X5000HUA Córdoba, Argentina. Electronic address:

To date, Alzheimer's disease is the most alarming neurodegenerative disorder worldwide. This illness is multifactorial in nature and cholinesterase inhibitors have been the ones used in clinical treatments. In this context, many of these drugs selectively inhibit the acetylcholinesterase enzyme interacting in both the active site and the peripheric anionic site. Read More

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Rapid Blood Transfusion: The Importance of Hemodilution and Needleless Connectors.

Cureus 2021 Mar 19;13(3):e13999. Epub 2021 Mar 19.

Anesthesiology, Stanford University Medical Center, Stanford, USA.

Introduction:  Large-bore cannulas are critical to administering IV fluids and blood products during resuscitation and treatment of hemorrhage. Although catheter flow rates for crystalloid solutions are well defined, rapid administration of blood products is poorly characterized. In this in vitro study, we examined the effects of hemodilution and needleless connectors on red blood cell (RBC) flow rates. Read More

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Coupling fluid flow to hydrogel fluidic devices with reversible "pop-it" connections.

Lab Chip 2021 05;21(10):2050-2058

Center for Biofilm Engineering, Montana State University, 214 Roberts Hall, Bozeman, MT 59717, USA. and Chemical and Biological Engineering Department, Montana State University, 214 Roberts Hall, Bozeman, MT 59717, USA.

Hydrogels are soft, water-based polymer gels that are increasingly used to fabricate free-standing fluidic devices for tissue and biological engineering applications. For many of these applications, pressurized liquid must be driven through the hydrogel device. To couple pressurized liquid to a hydrogel device, a common approach is to insert tubing into a hole in the gel; however, this usually results in leakage and expulsion of the tubing, and other options for coupling pressurized liquid to hydrogels remain limited. Read More

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Metabolic Profiling of Suprachiasmatic Nucleus Reveals Multifaceted Effects in an Alzheimer's Disease Mouse Model.

J Alzheimers Dis 2021 ;81(2):797-808

Institute of Medical Physics and Biophysics, University of Leipzig, Leipzig, Germany.

Background: Circadian rhythm disturbance is commonly observed in Alzheimer's disease (AD). In mammals, these rhythms are orchestrated by the superchiasmatic nucleus (SCN). Our previous study in the Tg2576 AD mouse model suggests that inflammatory responses, most likely manifested by low GABA production, may be one of the underlying perpetrators for the changes in circadian rhythmicity and sleep disturbance in AD. Read More

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January 2021

Development of a multiparametric (bio)sensing platform for continuous monitoring of stress metabolites.

Talanta 2021 Jul 15;229:122275. Epub 2021 Mar 15.

Univ. Grenoble Alpes, CEA, LETI, DTBS, L2CB, 38000, Grenoble, France. Electronic address:

There is a growing need for real-time monitoring of metabolic products that could reflect cell damages over extended periods. In this paper, we report the design and development of an original multiparametric (bio)sensing platform that is tailored for the real-time monitoring of cell metabolites derived from cell cultures. Most attractive features of our developed electrochemical (bio)sensing platform are its easy manufacturing process, that enables seamless scale-up, modular and versatile approach, and low cost. Read More

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Screw-loaded compression device for auricular keloid.

J Prosthet Dent 2021 Apr 3. Epub 2021 Apr 3.

Junior Resident, Department of Prosthodontics, Government Dental College, Thiruvananthapuram, Kerala, India.

Pressure therapy is widely used in the management of keloid mass and for preventing postexcision recurrence of earlobe keloid. Although various types of compression devices are available, the pressure applied by these devices is uncontrolled and associated with the risk of pressure necrosis. This article presents a novel design for a compression device with threaded connectors to control the amount and direction of the pressure applied on the keloid mass. Read More

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Simple-structure low-loss multi-core fiber LC connector using an align-by-contact method.

Opt Express 2021 Mar;29(6):9157-9164

We present a novel single-MCF connector without any additional or high-precision parts not found on a standard single-SMF connector. The proposed connector realizes rotational fiber alignment and ferrule floating simultaneously by employing a standard MU ferrule with a straight flange edge and a modified LC housing with a tapered hole that can make contact with the ferrule flange. Fabricated connectors achieved an average loss of 0. Read More

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Reusable snorkel masks adapted as particulate respirators.

PLoS One 2021 5;16(4):e0249201. Epub 2021 Apr 5.

National Heart and Lung Institute, Imperial College London, London, United Kingdom.

Introduction: During viral pandemics, filtering facepiece (FFP) masks together with eye protection form the essential components of personal protective equipment (PPE) for healthcare workers. There remain concerns regarding insufficient global supply and imperfect protection offered by currently available PPE strategies. A range of full-face snorkel masks were adapted to accept high grade medical respiratory filters using bespoke-designed 3D-printed connectors. Read More

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