检索结果-南通市图书馆

Multinuclear MR and MRI study of lithium-ion cells using a variable field magnet and a fixed frequency RF probe

在线全文

学校读者我要写书评

暂无评论

Magnetic Resonance Letters 2024年第1期4卷 10-20页

作者： Andrés Ramírez Aguilera Florin Marica Kevin j.Sanders Md Al Raihan C.Adam Dyker gillian R.goward bruce *** UNB MRI Centre Department of PhysicsUniversity of New BrunswickFrederictonNew BrunswickE3B 5A3Canada Department of Chemistry McMaster UniversityHamiltonOntarioL8S 4L8Canada Department of Chemistry University of New BrunswickFrederictonNew BrunswickE3B 5A3Canada

An exploratory multinuclear magnetic resonance(MR)and magnetic resonance imaging(MRI)study was performed on lithium-ion battery cells with ^(7)Li,^(19)F,and ^(1)H measurements.A variable field superconducting magnet with a fixed frequency parallel-plate radiofrequency(RF)probe was employed in the *** magnetic field was changed to set the resonance frequency of each nucleus to the fixed RF probe frequency of 33.7 *** cartridge-like lithium-ion cells,with graphite anodes and LiNi_(0.5)Mn_(0.3)Co_(0.2)O_(2)(NMC)cathodes,were *** cell was pristine,and one was charged to a cell voltage of 4.2 *** results presented demonstrate the great potential of the variable field magnet approach in multinuclear measurement of lithium-ion *** methods open the door for developing faster and simpler methods for detecting,quantifying,and interpreting MR and MRI data from lithium-ion and other batteries.

关键词： Multinuclear MR/MRI Variable field magnet Lithium-ion battery Parallel-plate rf probe

generation of Eco-Friendly and Disease-Resistant Channel Catfish(Ictalurus punctatus)Harboring the Alligator Cathelicidin gene via CRISPR/Cas9 Engineering

在线全文

学校读者我要写书评

暂无评论

Engineering 2024年第8期39卷 273-286页

作者： jinhai Wang Baofeng Su De Xing Timothy j.bruce Shangjia Li Logan Bern Mei Shang Andrew johnson Rhoda Mae C.Simora Michael Coogan Darshika U.Hettiarachchi Wenwen Wang Tasnuba Hasin jacob Al-Armanazi Cuiyu Lu Rex A.Dunham School of Fisheries Aquacultureand Aquatic SciencesAuburn UniversityAuburnAL 36849USA

As a precise and versatile tool for genome manipulation,the clustered regularly interspaced short palindromic repeats(CRISPR)/CRISPR-associated protein 9(Cas9)platform holds promise for modifying fish traits of *** the aim of reducing transgene introgression and controlling reproduction,upscaled disease resistance and reproductive intervention in catfish species have been studied to lower the potential environmental risks of the introgression of escapees as transgenic *** advantage of the CRISPR/Cas9-mediated system,we succeeded in integrating the cathelicidin gene(As-Cath)from an alligator(Alligator sinensis)into the target luteinizing hormone(lh)locus of channel catfish(Ictalurus punctatus)using two delivery systems assisted by double-stranded DNA(dsDNA)and single-stranded oligodeoxynucleotides(ssODNs),*** this study,high knock in(KI)efficiency(22.38%,64/286)but low ontarget events was achieved using the ssODN strategy,whereas adopting a dsDNA as the donor template led to an efficient on-target KI(10.80%,23/213).The on-target KI of As-Cath was instrumental in establishing the lh knockout(LH^(–)_As-Cath^(+))catfish line,which displayed heightened disease resistance and reduced fecundity compared with the wild-type(WT)sibling ***,administration of human chorionic gonadotropin(HCg)and luteinizing hormone-releasing hormone analogue(LHRHa)can restore the reproduction of the transgenic fish ***,we replaced the lh gene with an alligator cathelicidin transgene and then administered hormone therapy to move towards complete reproductive control of diseaseresistant transgenic catfish in an environmentally responsible *** strategy not only effectively improves consumer-valued traits but also guards against unwanted introgression,providing a breakthrough in aquaculture genetics to confine fish reproduction and prevent the establishment of transgenic or domestic genotypes in the natural environment.

关键词： genome editing ssODN dsDNA Antimicrobial peptide Reproductive confinement Aquaculture

Performance enhancement of futuristic airplanes by nature inspired biomimetic fish scale arrays--A design approach

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Biomimetic Intelligence & Robotics 2022年第2期2卷 32-47页

作者： ganesh Natarajan S bruce Ralphin Rose j Department of Mechanical Engineering Anna University Regional Campus TirunelveliTamilnaduIndia

Biomimetics has an immense potential to drive the next generation of technologies forward by propounding competent solutions from *** decades,the nonsmooth topography of most living creatures has been critical to their existence and *** to human-made smooth surfaces,when adapted for fluid flow applications,nonsmooth surfaces can enhance the overall aerodynamic performance by reducing the drag ***,the bioinspired scale structure of fish has been identified as a key biomimetic derivative for improving the aerodynamic efficiency in various cross-domain *** study investigates the aerodynamics of a fish scale array(FSA)NACA 0021 model at a specific Reynolds number(Re)of approximately 2.46×105 that is meant for laminar flow conditions using Computational Fluid Dynamics(CFD)tools and a subsonic wind tunnel facility.A 3D printed biomimetic FSA film is developed and affixed on the NACA 0021 wing profile for the experimental investigation,followed by flow visualization through the smoke tunnel *** proved qualitatively under specific aerodynamic conditions,the creation of velocity streaks has a major role in the drag reduction *** obtain a clear perspective of flow across the overlapping fish scale structures,the results are focused on the central and overlapping regions of the FSA *** experiment has proved the existence of a combined formation of low and high velocity streaks in central and overlapping *** FSA 0021 model showed a maximum drag reduction of 9.57%,which was attributed to the streak formation phenomenon observed in the overlapping FSA configuration.

关键词： Biomimetics Aerodynamics Fish scale arrays Drag reduction Bioinspired design

Analysis of Bio-inspired Fishbone Based Corrugated Rib for Adaptive Camber Morphing

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

journal of Bionic Engineering 2023年第3期20卷 1083-1102页

作者： R.jini Raj j.bruce Ralphin Rose A.Vasudevan Department of Mechanical Engineering Anna University Regional CampusTirunelveli627007India Saveetha School of Engineering SIMATSChennai600124India

Bioinspired active camber morphing is an innovative solution for the aerodynamic performance enhancement of flight vehicles such as Micro Aerial Vehicles(MAVs)and Unmanned Aerial Vehicles(UAVs).In the present article,a bio-inspired Fish Bone Active Camber(FishBAC)corrugated rib design concept with and without a spine for an Unmanned Aerial Vehicle(UAV)is *** wing model is composed of multiple corrugated ribs and a splitted spar for connecting each *** rib geometry is subjected to static structural analysis using ANSYS Finite Element Analysis(FEA)module under the unit load *** deformation modes are first extracted from the solution of the wind tunnel test and the elastically deformed NACA 4412 profile will be used to perform Fluid-Structure Interaction(FSI)studies as a partly coupled *** corrugated rib with spine design is a stable structure as inspired from nature species that can withstand elastic and inertial *** fluid dynamics(CFD)simulation is performed to compute the coefficient of lift(Cl),coefficient of drag(Cd)at different Angle of Attack(AoA)for a modified NACA 4412 airfoil and the pressure loads acting on the deformed shape is *** Cl obtained for the modified airfoil at lower AoA is about 60–80%higher and the maximum Cl(Clmax)is 62%higher than the baseline *** Cd of modified airfoil is reduced about 20%at the AoAα=3°as compared with the baseline *** proposed corrugated rib structure has been successfully 3D printed with Polylactic Acid plus(PLA+)material and the wind tunnel testing is done to validate the Cl,Cd values obtained through CFD simulations and the results are presented.

关键词： Bioinspired design Active morphing Fish bone Wind tunnel CFD

Adding Value to Crop Production Systems by Integrating Forage Cover Crop grazing

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

American journal of Plant Sciences 2024年第3期15卷 180-192页

作者： Robert B. Mitchell Daren D. Redfearn Kenneth P. Vogel Terry j. Klopfenstein galen Erickson P. Stephen Baenziger bruce E. Anderson Mary E. Drewnoski jay Parsons Steven D. Masterson Marty R. Schmer Virginia L. jin USDA-ARS Wheat Sorghum and Forage Research Unit University of Nebraska-Lincoln Lincoln NE USA Department of Agronomy and Horticulture University of Nebraska-Lincoln Lincoln NE USA Department of Animal Science University of Nebraska-Lincoln Lincoln NE USA Department of Agricultural Economics University of Nebraska-Lincoln Lincoln NE USA USDA-ARS Agroecosystem Management Research Unit University of Nebraska-Lincoln Lincoln NE USA

In addition to their value as cereal grains, wheat (Triticum aestivum L.) and triticale (× Triticosecale Wittmack) are important cool-season annual forages and cover crops. Yearling steer (Bos taurus) performance was compared in the spring following autumn establishment as for age cover crops after soybean [glycine max (L.) Merr.] grain harvest. Replicated pastures (0.4 ha) were no-till seeded in three consecutive years into soybean stubble in autumn, fertilized, and grazed the following spring near Ithaca, NE, USA. Each pasture (n = 3) was continuously stocked in spring with four yearling steers (380 ± 38 kg) for 17, 32, and 28 d in 2005, 2006, and 2007, respectively. In 2005, average daily gain (ADg) for steers grazing triticale exceeded the ADg for wheat by 0.31 kghd-1d-1. In 2006, wheat ADg exceeded that for triticale by 0.12 kghd-1d-1. In 2007, steers grazing wheat lost weight, while steers grazing triticale gained 0.20 kghd-1d-1. Based on the 3-year average animal gains valued at $1.32 kg-1, mean net return ($ ha-1 yr-1) was $62.15 for triticale and $22.55 for wheat. Since these grazed cover crops provide ecosystem services in addition to forage, grazing could be viewed as a mechanism for recovering costs and adds additional value to the system. Based on this 3-year grazing trial, triticale was superior to wheat and likely will provide the most stable beef yearling performance across years with variable weather for the western Cornbelt USA.

关键词： Cover crops Soybean Triticale Wheat

A numerical optimization of high altitude testing facility for wind tunnel experiments

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese journal of Aeronautics 2015年第3期28卷 636-648页

作者： j.bruce Ralphin Rose g.R.jinu C.j.Brindha Department of Aeronautical Engineering Regional Centre of Anna University Department of Mechanical Engineering University College of EngineeringNagercoil Department of Aeronautical Engineering The Raajas Engineering College

Abstract High altitude test facilities are required to test the high area ratio nozzles operating at the upper stages of rocket in the nozzle full flow conditions. It is typically achieved by creating the ambient pressure equal or less than the nozzle exit pressure. On average, air/gN2 is used as active gas for ejector system that is stored in the high pressure cylinders. The wind tunnel facilities are used for conducting aerodynamic simulation experiments at/under various flow velocities and operating conditions. However, constructing both of these facilities require more laboratory space and expensive instruments. Because of this demerit, a novel scheme is implemented for conducting wind tunnel experiments by using the existing infrastructure available in the high altitude testing （HAT） facility. This article presents the details about the methods implemented for suitably modifying the sub-scale HAT facility to conduct wind tunnel experiments. Hence, the design of nozzle for required area ratio A/A＊, realization of test section and the optimized configuration are focused in the present analysis. Specific insights into various rocket models including high thrust cryogenic engines and their holding mechanisms to conduct wind tunnel experiments in the HAT facility are analyzed. A detailed CFD analysis is done to propose this conversion without affecting the existing functional requirements of the HAT facility.

关键词： CFD Enclosed free-jet section ground testing High altitude testing (HAT)facility Optimization

The acceleration of a high-charge electron bunch to 10 geV in a 10-cm nanoparticle-assisted wakefield accelerator

在线全文

学校读者我要写书评

暂无评论

Matter and Radiation at Extremes 2024年第1期9卷 15-24页

作者： Constantin Aniculaesei Thanh Ha Samuel Yoffe Lance Labun Stephen Milton Edward McCary Michael M.Spinks Hernan j.Quevedo Ou Z.Labun Ritwik Sain Andrea Hannasch Rafal Zgadzaj Isabella Pagano jose A.Franco-Altamirano Martin L.Ringuette Erhart gaul Scott V.Luedtke ganesh Tiwari Bernhard Ersfeld Enrico Brunetti Hartmut Ruhl Todd Ditmire Sandra bruce Michael E.Donovan Michael C.Downer Dino A.jaroszynski Bjorn Manuel Hegelich University of Texas at Austin AustinTexas 78712USA SUPA Department of Physics University of StrathclydeGlasgowScotland G4 ONGUnited Kingdom Tau Systems Inc.AustinTexas 78701USA Lawrence Livermore National Laboratory LivermoreCalifornia 94550USA Los Alamos National Laboratory Los AlamosNew Mexico 87545USA Brookhaven National Laboratory UptonNew York 11973USA Ludwig-Maximilians-Universität MunichGermany

An intense laser pulse focused onto a plasma can excite nonlinear plasma *** appropriate conditions,electrons from the background plasma are trapped in the plasma wave and accelerated to ultra-relativistic *** scheme is called a laser wakefield *** this work,we present results from a laser wakefield acceleration experiment using a petawatt-class laser to excite the wakefields as well as nanoparticles to assist the injection of electrons into the accelerating phase of the *** find that a 10-cm-long,nanoparticle-assisted laser wakefield accelerator can generate 340 pC,10±1.86 geV electron bunches with a 3.4 geV rms convolved energy spread and a 0.9 mrad rms *** can also produce bunches with lower energies in the 4–6 geV range.

关键词： acceleration nanoparticle charge

The parallel-plate resonator:An RF probe for MR and MRI studies over a wide frequency range

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Magnetic Resonance Letters 2023年第4期3卷 306-318页

作者： Andres Ramírez Aguilera Kevin j.Sanders gillian R.goward bruce *** UNB MRI Centre Department of PhysicsUniversity of New BrunswickFrederictonNew BrunswickE3B 5A3Canada Department of Chemistry McMaster UniversityHamiltonOntarioL8S 4L8Canada

We explore the use of the parallel-plate resonator for the study of thin cuboid samples over a wide range of magnetic resonance *** parallel-plate resonator functions at frequencies from tens to hundreds of *** parallel-plate resonators are presented and discussed in a frequency range from 8 to 500 *** resonance experiments were performed on both horizontal and vertical bore magnet systems with lithium and hydrogen ***-plate radiofrequency(RF)probes are easy to build and easy to *** and simulations showed good sensitivity of the parallel-plate RF probe geometry with a small decrease in sensitivity at higher frequencies.

关键词： Parallel-plate resonator Optimization Magnetic resonance/magnetic resonance imaging(MR/MRI) Batteries

NON-INVASIVE MEASUREMENT OF DEEP TISSUE TEMPERATURE CHANgES CAUSED BY APOPTOSIS DURINg BREAST CANCER NEOADjUVANT CHEMOTHERAPY:A CASE STUDY

在线全文

学校读者我要写书评

暂无评论

journal of Innovative Optical Health Sciences 2011年第4期4卷 361-372页

作者： SO HYUN CHUNg RITA MEHTA bruce j.TROMBERg A.g.YODH Department of Physics and Astronomy University of Pennsylvania 209 S.33rd StPhiladelphiaPA 19104USA Department of Medicine UC Irvine Healthcare 101 The City Drive SouthOrangeCA 92868USA Beckman Laser Institute Department of Biomedical Engineering University of CaliforniaIrvine1002 Health Sciences Rd IrvineCA 92612USA

Treatment-induced apoptosis of cancer cells is one goal of cancer ***,more heat is generated by mitochondria during apoptosis,especially the uncoupled apoptotic state,^(1,2) compared to the resting *** this case study,we explore these thermal effects by longitudinally measuring temperature variations in a breast lesion of a pathological complete responder during neoadjuvant chemotherapy(NAC).Diffuse Optical Spectroscopic Imaging(DOSI)was employed to derive absolute deep tissue temperature using subtle spectral features of the water peak at 975 nm.^(3)A significant temperature increase was observed in time windows during the anthracycline and cyclophosphamide(AC)regimen but not in the paclitaxel and bevacizumab *** concentration changes generally did not follow temperature,suggesting the measured temperature increases were likely due to mitochondrial uncoupling rather than a direct vascular effect.A simultaneous increase of tissue oxygen saturation with temperature was observed,suggesting that oxidative stress also contributes to *** preliminary,this study indicates longitudinal DOSI tissue temperature monitoring provides information that can improve our understanding of the mechanisms of tissue response during NAC.

关键词： Deep tissue temperature Diffuse Optical Spectroscopic Imaging apoptosis neoadjuvant chemotherapy breast cancer Bound Water Index NIR water absorption spectrum