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Effects of natural products on ischemic heart diseases and cardiovascular system

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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

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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

Facile hydrothermal synthesis of flower-like hematite microstructure with high photocatalytic properties

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Journal of Advanced Ceramics 2015年第1期4卷 61-64页

作者： Timur sh.ATABAEV Department of Physics and Astronomy Seoul National UniversityGwanak-guSeoul 151-747Republic of Korea

A flower-like hematite microstructure has been successfully prepared by a facile hydrothermal synthesis method without using any organic solvents or *** is revealed that the flower-like hematite microstructure consists of well-crystallized nanorods with the average diameter of about 100±15 nm and average length of about 900±100 nm growing from the centers.A possible growth mechanism of the flower-likeα-Fe_(2)O_(3)microstructure is proposed and *** photocatalytic properties of the synthesized flower-like hematite nanostructure are evaluated using the degradation of rhodamine B in aqueous solution.

关键词： hematite nanostructure hydrothermal synthesis

Transesterification catalyzed by samarium tri-2-propoxide

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Chinese Journal of Chemistry 1997年第1期15卷 90-93页

作者： Fu, XL Wu, sh Department of Chemistry Fudan University Shanghai 200433 Chino [*]Department of Chemistry Fudan University Shanghai 200433 Chino

A facile method for transesterification was reported. Under catalysis by samarium tri-2-propoxide the yields of transesterification are good to excellent, and this reaction has surprising selectivity and mildness due ... 详细信息

关键词： transesterification samarium tri-2-propoxide catalysis

Some studies of the interaction between two two-level atoms and SU(1,1) quantum systems

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Chinese Physics B 2018年第10期27卷 116-122页

作者： T M El-shahat M kh Ismail Faculty of Science Al-Azhar University. Assiut 71524 Egypt

Herein, we present an approach to look for the best phenomenon to measure quantum correlation. The system of two isolated qubits each interacting with a single-mode cavity was theoretically created to study the quantum correlation. Some of the phenomena, such as the quantum discord and concurrence, were generated through such a system. The influences of initial state purity, qubit motion, and detuning parameters were discussed for the phenomena. These parameters for a specific value show that the behavior of phenomena are analogous. It is interesting to mention that some values of detuning undergo a sudden death of phenomena, and the quantum discord still captures the qubits quantum correlation. We predict that the quantum discord may be a better measure of quantum correlation than concurrence.

关键词： an isolated atom with a cavity SU (1,1) quantum discord concurrence

The effect of rotation on plane waves in generalized thermo-microstretch elastic solid with one relaxation time for a mode-I crack problem

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Chinese Physics B 2011年第7期20卷 266-278页

作者： kh.Lotfy Mohamed I.A.Othman Department of Mathematics Faculty of ScienceZagazig UniversityP.O.Box 44519ZagazigEgypt Department of Mathematics Faculty of SciencealmithnabQassim UniversityP.O.Box 6666AlmithnabKingdom of Saudi Arabia

The present paper is aimed at studying the effect of rotation on the general model of the equations of the generalized thermo-microstretch for a homogeneous isotropic elastic half-space solid, whose surface is subjected to a Mode-I crack problem. The problem is studied in the context of the generalized thermoelasticity Lord shulman＇s （L-S） theory with one relaxation time, as well as with the classical dynamical coupled theory （CD）. The normal mode analysis is used to obtain the exact expressions for the displacement components, the force stresses, the temperature, the couple stresses and the microstress distribution. The variations of the considered variables through the horizontal distance are illustrated graphically. Comparisons of the results are made between the two theories with and without the rotation and the microstretch constants.

关键词： Lord-shulman's theory thermoelasticity microrotation microstretch

Numerical modeling of vibration fatigue of viscoelastic pipelines conveying pulsating fluid flow

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International Journal of Modeling, Simulation, and Scientific Computing 2020年第3期11卷 117-134页

作者： kh.M.Komilova Department of Higher Mathematics Tashkent Institute of Irrigation and Agricultural Mechanization Engineers Tashkent Uzbekistan

The effect of investigation results on viscoelastic properties of the material and bases on vibration fatigue of a pipeline conveying pulsating fluid flow is given in the paper.A mathematical model of viscoelastic pipeline vibrations based on the theory of beams was developed when a pulsating fluid flows through it.A computational algorithm has been developed to solve vibration problems of composite pipelines conveying pulsating *** and amplitude-time characteristics of vibrations of composite pipelines conveying pulsating fluid were studied at wide range of parameters variation of deformable systems and fluid flow.

关键词： Numerical simulation vibration pulsating fluid pipeline critical rate

Effects of Curing Conditions on Strength Development of High Strength Concrete

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China Ocean Engineering 1997年第1期12卷 99-108页

作者： Cai, YB Kwan, kh UNIV HONG KONG DEPT CIVIL & STRUCT ENGNHONG KONGHONG KONG

This paper presents the results of a series of studies on the influence of curing conditions on the strength development of high strength concrete. The 1-, 3-, 7-, 14- and 28-day strengths of four different mixes of Grade 75 similar to 80 concrete, with or without pulverized fuel ash and/or condensed silica fume, under five different curing regimes were investigated. It is revealed that the curing conditions have significant influence on both the short term and long term strength development of the concrete and that concrete mixes of the same grade but containing different mineral admixtures show distinct favour for a curing regime. These results will be helpful for evaluating suitable curing methods for high strength concrete with different mix proportions.

关键词： curing condition high strength concrete strength development mineral admixture mix proportion

高效可回收聚(4-乙烯基吡啶)高氯酸催化剂用于合成双香豆素和双吲哚(英文)

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催化学报 2014年第7期35卷 1017-1023页

作者： Farhad shirini Saeed Esmaeeli-ranjbar Mohadeseh Seddighi Department of Chemistry Faculty of Sciences University of Guilan Rasht 41335 Iran

Poly(4-vinylpyridinium) perchlorate has been used as an efficient solid acid catalyst for the synthesis of 3,3'-(arylmethylene)bis(4-hydroxycoumarins) and bis(indolyl)methanes, with the products being formed in excellent yields over very short reaction times under mild and environmentally friendly conditions. This catalyst can be reused several times without any appreciable loss in its activity.

关键词：固体酸催化剂乙烯基吡啶高氯酸根可再生合成羟基香豆素反应时间环境友好