检索结果-南通市图书馆

棉花学报 2002年第S1期14卷 93-93页

As a result of long standing investigation onurgent problems of amphidiploid cotton speciesGossypium hirsutum genetics,for the first timegenetic determination of the most importanttraits has been established,and the uniquegenetic collection of homozygous isogenic lineshas been developed.A scientifically well-founded theory about combined types ofpolygene interaction in genetic determination oftracts in cotton,has been developed.

关键词：棉花纤维等基因系收集 determination of Gossypium hirsutum urgent problems

Synthesis and characterization of nanocarbon from waste batteries via an eco-friendly method

在线全文

学校读者我要写书评

暂无评论

Waste Disposal and Sustainable Energy 2024年第2期6卷 197-208页

作者： Maraim kh.Uoda Hussein Q.Hussein Rana R.Jalil Chemical Engineering Department College of EngineeringUniversity of BaghdadBaghdadIraq Thi.Qar Oil Company NassriyaIraq Petroleum Research and Development Center BaghdadIraq

The widespread use of disposable batteries to power common electronic devices is a major source of *** are growing environmental and health concerns due to the expansion of e-waste around the ***,developing a reli-able system for recycling old batteries has reached the top of the recycling priority *** current study presents a novel approach to synthesis carbon nanoparticles(CNPs)from spent batteries via an eco-friendly method that offers economical,environment-friendly,and nontoxic approaches in comparison to conventional chemical *** synthesized nano-particles were characterized by field emission scanning electron microscopy(FE-SEM),energy-dispersive X-ray(EDX),powder X-ray diffractometry(XRD),UV-VIS absorption analysis(UV),Fourier transform infrared spectroscopy(FT-IR),Atomic force microscope(AFM),and thermo-gravimetric analysis(TGA).The average diameter of the synthesized particles was 40.16 nm,and the particles tended to be aspherical in *** analysis also predicted the presence of pure carbon,with some contamination arrived at 15%(in weight).This is a novel study in which nanocarbons were synthesized in a brine(7600x10-6)from a target(CNPs>75 nm),which paves the way for future use of CNPs derived from spent batteries and helps the environment by decreasing the amount of electronic waste dumped in landfills.

关键词： Novel Zn-C battery Carbon nanoparticles Characterization Eco-friendly methods

Novel pressure and displacement sensors based on carbon nanotubes

维普期刊数据库评论

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 Physics B 2015年第1期24卷 560-563页

作者： kh.S.Karimov khaulah Sulaiman Zubair Ahmad khakim M.akhmedov A.Mateen GIK Institute of Engineering Sciences and Technology Topi District Swabi KPK 23640 Pakistan Physical Technical Institute of Academy of Sciences Rudaki Ave. 33 Dushanbe 734025 Tajikistan Low Dimensional Materials Research Centre (LDMRC) Department of Physics Faculty of Science University of Malaya 50603 Kuala Lumpur Malaysia Center for Innovative Development of Science and New Technologies of Academy of Sciences Rudaki Ave. 33 Dushanbe 734025 Tajikistan Faculty of Materials Science and Engineering Institute of Space Technology Islamabad 44000 Pakistan

We report newly designed pressure and displacement capacitive sensors based on a flexible paper–CNT *** carbon nanotube（CNT） powder was deposited on a thin paper substrate and was pressed at an elevated *** sheet resistance of the paper–CNT films was in the range of 2–4 kΩ/cm^2. The paper–CNT films were used to fabricate pressure and displacement sensors. The sensitivities of the pressure and the displacement sensors were found to be17.3 p F·m^2/k N and 0.93 10-3p F/μm, respectively. The experimental results were compared with the simulated data and they found good agreement with each other.

关键词： carbon nanotube sensors composite capacitance

The effect of a magnetic field on a 2D problem of fibre-reinforced thermoelasticity rotation under three theories

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2012年第6期21卷 264-275页

作者： kh.Lotfy Department of Mathematics Faculty of ScienceZagazig UniversityZagazigP.O.Box 44519Egypt Department of Mathematics Faculty of Science and ArtsAl-mithnabQassim UniversityP.O.Box 931Buridah 51931Al-mithnabKingdom of Saudi Arabia

In the present paper, we introduce the coupled theory （CD）, Lord-Schulman （LS） theory, and Green-Lindsay （GL） theory to study the influences of a magnetic field and rotation on a two-dimensional problem of fibre-reinforced thermoelasticity. The material is a homogeneous isotropic elastic half-space. The method applied here is to use normal mode analysis to solve a thermal shock problem. Some particular cases are also discussed in the context of the problem. Deformation of a body depends on the nature of the force applied as well as the type of boundary conditions. Numerical results for the temperature, displacement, and thermal stress components are given and illustrated graphically in the absence and the presence of the magnetic field and rotation.

关键词： Lord-Schulman theory Green-Lindsay theory coupled theory reinforcement rotation,magnetic field

Effect of High-Frequency Electric Field on Propagation of Electrostatic Wave in a Non-Uniform Relativistic Plasma Waveguide

在线全文

学校读者我要写书评

暂无评论

Plasma Science and Technology 2008年第3期10卷 278-283页

作者： kh.H.EL-SHORBAGY Plasma Physics and Nuclear Fusion Department Nuclear Research Center Atomic Energy Authority Cairo Egypt

The effect of a high frequency （HF） electric field on the propagation of electrostatic wave in a 2D non-uniform relativistic plasma waveguide is investigated. A variable separation method is applied to the two-fluid plasma model. An analytical study of the reflection of electrostatic wave propagation along a magnetized non-uniform relativistic plasma slab subjected to an intense HF electric field is presented and compared with the case of a non relativistic plasma. It is found that, when the frequency of the incident wave is close to the relativistic electron plasma frequency, the plasma is less reflective due to the presence of both an HF field and the effect of relativistic electrons. On the other hand, for a low-frequency incident wave the reflection coefficient is directly proportional to the amplitude of the HF field. Also, it is shown that the relativistic electron plasma leads to a decrease in the value of reflection coefficient in comparison with the case of the non relativistic plasma.

关键词： electrostatic wave relativistic plasma waveguide reflection coefficient separation method

THE DRAG EXERTED BY AN OBLATE ROTATING ATMOSPHERE ON AN ARTIFICIAL SATELLITE

在线全文

学校读者我要写书评

暂无评论

Applied Mathematics and Mechanics(English Edition) 2002年第9期23卷 1016-1028页

作者： kh.I.khalil National Research Institute of Astronomy and Geophsics-Helwan Cairo Egypt

A theory is formulated for the motion of an artificial satellite under the joint effects of Earth oblateness and atmospheric drag. The Hamilton ' s equations of motion are derived including the zonal harmonics of the geopotential up to J4 and the drag accelerations. The atmospheric model is an oblate rotating model in which the atmospheric rotation lags behind that of the Earth as the increasing distance from the Earth. The drag free problem is first solved via two canonical transformations to eliminate in succession the short and long period terms. An operator D is then defined and used to formulate the drag acceleration in terms of the double primed variables expressing the solution of the drag-free problem.

关键词： oblateness the Hamiltonian Lie transform

Abnormal liver function tests associated with severe rhabdomyolysis

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2020年第10期26卷 1020-1028页

作者： Andy kh Lim Department of General Medicine Monash Health Department of Medicine School of Clinical Sciences Monash University

Rhabdomyolysis is a syndrome of skeletal muscle injury with release of cellular constituents such as potassium,phosphate,urate and intracellular proteins such as myoglobin into the circulation,which may cause complications including acute kidney injury,electrolyte disturbance and cardiac *** liver function tests are frequently observed in cases of severe ***,there is an increase in serum aminotransferases,namely aspartate aminotransferase and alanine *** raises the question of liver injury and often triggers a pathway of investigation which may lead to a liver ***,muscle can also be a source of the increased aminotransferase *** review discusses the dilemma of finding abnormal liver function tests in the setting of muscle injury and the potential implications of such an *** delves into some of the clinical and experimental evidence for correlating muscle injury to raised aminotransferases,and discusses pathophysiological mechanisms such as oxidative stress which may cause actual liver *** aminotransferases lack tissue specificity to allow clinicians to distinguish primary liver injury from muscle *** review also explores potential approaches to improve the accuracy of our diagnostic tools,so that excessive or unnecessary liver investigations can be avoided.

关键词： Rhabdomyolysis Muscle Creatine kinase Liver function tests Alanine aminotransferase Aspartate aminotransferase Aminotransferases

Effects of natural products on ischemic heart diseases and cardiovascular system

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Acta Pharmacologica Sinica 2002年第12期23卷 89-98页

作者： Benny kh TAN,Matthew WHITEMAN Department of Pharmacology Department of Biochemistry Faculty of Medicine National University of Singapore Singapore

INTRODUCTION Ischemic heart diseases remain the leading causeof death in most developed countries as seen over thepast quarter-century. Reducing the mortality rate andprevention of myocardial infarction (MI) are of utmostimportance. The use of Western medicinal drugs forthe treatment of hypertension, congestive heart failureand post MI are widely accepted. Although some Tra-ditional Chinese Medicines have been used in mainland,Hong Kong, Taiwan of China in clinics and other Chi-nese communities worldwide for centuries, our under-

关键词： myocardial infarction herbal medicine antioxidants cardiovascular system Salvia miltiorrhiza

Larval feeding status regulates the transcript levels of genes encoding PTTH and allatoregulatory peptides in silkworm Bombyx mori

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Insect Science 2021年第3期28卷 680-691页

作者： Sanathoibi D.kh Bela Keshan Department of Zoology North-Eastern Hill UniversityShillongMeghalayaIndia

In Bombyx mori,two dorsolateral neurosecretory cells(NSCs)in each of thetwo brain lobes have been identified as prothoracicotropic hormone(PTTH)*** neuropeptide in insects stimulates the prothoracic gland for the synthesis andrelease of ecdysone,responsible for the molting ***(AT)and allatostatin(AST)are allatoregulatory neuropeptides that regulate juvenile hormone ***,by using RT-qPCR,we showed that in ***,nutritional stress modulates themRNA expression of AT and AST-C(allatostain type C)in the central nervous systemconsisting of the brain lobes and all the associated *** whole-mount in situhybridization,we showed that the feeding status of Bombyx larvae also influences the ex-pression of PTTH in the NSCs of the *** deprivation significantly decreased themRNA expression levels of PTTH in larvae at active or terminal growth ***,we showed that insulin modulates the expression level of ***,its action wasdependent on the feeding status of the *** feeding,the insulin decreased the PTTHexpression level,while at food deprivation,the insulin increased the PTTH *** data thus indicates that larval feeding status plays an important role in alteringthe mRNA expression levels of allatoregulatory peptide genes and PTTH.

关键词： allatotropin allatostatin feeding food deprivation prothoracicotropic hor-mone silkworm