检索结果-南通市图书馆

serum Levels of Antioxidant Vitamins in relation to Coronary Artery Disease: A Case Control study of Koreans

在线全文

学校读者我要写书评

暂无评论

biomedical and Environmental sciences 1996年第2期9卷 229-235页

作者： KIM s. Y. LEE-KIM Y. C. KIM M. K. sUH J. Y. CHUNG E. J. CHO. s. Y. CHO. b. K. AND sUHI(Department of Food and Nutrition Cardiovascular Center Department of Preventive Medicine Yonsei University, seoul, Korea) Department of Food and Nutrition Yonsei University Seoul Korea.

With the changes in trends of disease pattern from infectious to chronic degenerative disease, cardiovascular disease has been considered as the major cause of death in *** studies have been done on the antioxidant effects of some vitamins in the prevention of chronic illness, but not many in relation to the cardiovascular ***, the relation between antioxidant vitamins, mainly α-tocopherol (α-T) and b-carotene (b-C), and coronary artery disease (CAD) such as angina pectoris and myocardial infarction has been investigated in this *** blood samples were obtained from the CAD patients who were angiographically diagnosed within a month (100 case group). Patients who had an experience of PTCA or CAbG were excluded from the study. Control subjects were healthy adults who had normal EKG values, no chest pain and no past history of cardiac disease (100 control group). All subjects were free of serum lipid lowering drugs. serum α-T and b-C were analysed using HPLC. In addition to antioxidant vitamins, serum lipids (total cholesterol, HDL, TG) were also measured. Each case and control was matched in terms of age and sex. And all the CAD risk factors such as blood pressure, smoking, alcohol, serum lipid profile and bMI were adjusted to determine pure effect(s) of α-T and b-C on the *** concentrations of both α-T and b-C were significantly lower in the CAD group than those in control group (Proup, mean values of α-T and b-C were 11.9±7.2 (μg/ml), 35.8±3.1 (μg/dl) respectively. As for the levels of b-C, it shows inverse relation with age, but not for the α-T Ievels. serum levels of both vitamins did not show any significant differences in terms of sex, but men have a tendency o higher levels of b-C,but lower levels of α-T

关键词： Case serum Levels of Antioxidant Vitamins in relation to Coronary Artery Disease A Case Control study of Koreans GsH

study of possibility of cell recognition in brain tumors

在线全文

学校读者我要写书评

暂无评论

Frontiers of Optoelectronics 2020年第4期13卷 371-380页

作者： Yulia s.MAKLYGINA Alexei s.sKObELTsIN Tatiana A.sAVELIEVA Galina V.PAVLOVA Ivan V.CHEKHONIN Olga I.GUrINA Anastasiya A.Chernysheva sergey A.Cherepanov Victor b.LOsCHENOV Prokhorov General Physics Institute of the russian Academy of sciences Moscow 119991.Russia National research Nuclear University MEPhI Moscow 115409Russia Institute of Gene biology Russian Academy of SciencesMoscow 119334Russia burdenko Neurosurgical Institute Moscow 125047Russia serbsky National Medical research Centre of Psychiatry and Narcology under the rF Ministry of Public Health Moscow 119034.Russia

The brain has an exceptionally high requirement for energy metabolism,with glucose serving as the exclusive energy ***,including glioblastoma,have a high glucose uptake and rely on aerobic glycolysis for energy *** alternation of high-efficiency oxidative phosphorylation to a low-efficiency aerobic glycolysis pathway(Warburg effect)provides macromolecules for biosynthesis and *** research indicates that the specific metabolism in the tumor tissue and nonnal brain tissue in the glioma allows the use of 5-aminolevulinic acid(5 ALA)-induced protoporphyrin IX(PpIX)and methylene blue(Mb)to monitor and correct the development of the *** focus is on the detection of the differences between tumor cells and tumorassociated macrophages/microglia using spectroscopic and microscopic methods,based on the fluorescent signals and the difference in the drug accumulation of photosensitizers(Pss).since 5 ALA has long been used effectively in the clinic for fluorescent surgical navigation,it was employed as an agent to identify the localization of tumor tissue and study its composition,particularly tumor and immune cells(macrophages),which have also been shown to actively accumulate ***,since PpIX is photodynamically active,it can be considered effective as the main target of tumor tissue for further successful photodynamic *** was employed to visualize resident microglia,which is important for their activation/deactivation to prevent the reprogramming of the immune cells by the ***,using two drugs,it is possible to prevent crosstalk between tumor cells and the immune cells of different geneses.

关键词： fluorescent diagnostics spectroscopic method video fluorescent method photosensitizer(Ps) brain microglia macrophages 5-aminolevulinic acid(5 ALA) methylene blue(Mb)

加州兰德斯7.3级地震远距离触发的地震活动

在线全文

学校读者我要写书评

暂无评论

世界地震译丛 1994年第4期25卷 15-23页

作者： D.P.Hill P.A.reasenberg A.Michacl W.JArabaz G.beroza D.brumbaugh J.N.Drune r.Castro s.Davis D.dePolo W.L.rllsworth J.Gombers s.Harmsen L.House s.M.Jackon M.J.s.Johnston r.Keller s.Malone L.Mungula s.nava J.C.Pechmann A.sanford r.W.simpson r.b.smith M.stickney A.Vudal s.Walter V.Wong J.Zollweg 张嘉延河北省地震局

1992年6月28日7.3级兰德斯地震在美国西部大部分地区触发了地震活动的异常迅速而广泛的增强.所触发的地震发生在距兰德斯主震1250km(震源尺度的17倍)处,范围局限于具有持久地震活动性的地区,并呈走滑到正断层机制.其中许多还是地热和近... 详细信息

1992年6月28日7.3级兰德斯地震在美国西部大部分地区触发了地震活动的异常迅速而广泛的增强.所触发的地震发生在距兰德斯主震1250km(震源尺度的17倍)处,范围局限于具有持久地震活动性的地区,并呈走滑到正断层机制.其中许多还是地热和近代火山活动场所.根据计算的地震弹性模型的静应力交化似乎很小,并不足以导致触发。最有可能的解释是,伴随主震地震波的大的动应交和地壳流体(或许还包括地壳岩浆)之间的非线性相互作用。

关键词：地震地震活动性远距离触发加州

在线全文

学校读者我要写书评

暂无评论

印度利用灌溉系统开发小水电站

国际水力发电 1992年第11期44卷 1-5页

作者： b·r·杰根 s·多赖·拉吉向世武

在印度卡纳塔克邦利用已建的灌溉工程和大型水电站开发小水电站发电，但国家和邦政府的法律阻碍了这些工程的顺利和快速实施，而且由于缺乏地方工业而过分地依赖外国公司。笔者认为，中国已摸索出这两个问题的解决办法，印度官方应该仿效。

关键词：印度中国地方工业外国公司政府国家灌溉系统小水电站大型水电站灌溉工程

Influence of local stiffeners and cutout shapes on the vibration and stability characteristics of quasi-isotropic laminates under hygro-thermo-mechanical loadings

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

Defence Technology（防务技术） 2022年第12期18卷 2107-2124页

作者： T.rajanna K.s.subash Chandra K.Venkata rao Department of Civil Engineering B.M.S College of EngineeringBengaluru560019India research scholar B.M.S College of EngineeringBengaluru560019India Department of Mechanical Engineering B.M.S Evening College of EngineeringBengaluru560019India Department of Mechanical Engineering Government PolytechnicBagepalli561207India

The perforated stiffened panel is generally found as a sub-component of sophisticated *** fundamental purpose of this panel is to withstand against buckling under complicated loading and environmental ***,an accurate knowledge of critical buckling behaviour of stiffened panels is very much essential for a reliable and lightweight structural *** this paper,the focus is on quasi-laminated panels with different cutout shapes of various sizes and their responses to hygrothermal environments under nonlinearly varying edge loads and is compared with the locally stiffened *** this,the modelling of the panel and stiffener is done by adopting nine-noded heterosis plate elements and three noded beam elements *** stiffener formulation is suitably modified in order to take the torsional effect also into consideration along with the effect of shear ***,the plate and the stiffener elements are treated separately,and then the displacement compatibility is maintained between them by using the transformation *** a given loading and geometric discontinuity,the stress distribution within the perforated panel is highly non-uniform in nature and hence a dynamic approach has been used to calculate buckling loads by adopting two sets of boundary conditions,one set for pre-buckling stress analysis and the second set for buckling *** different quasi-isotropic stacking sequences are deliberated in this work by varying different ply-orientation in each *** study also addresses the effect of various parameters such as nonlinear loads,hygro-thermal loads,cutout size and shapes,position of cutout,stiffener parameters,stacking sequences,thickness of plate and boundary conditions.

关键词： Locally stiffened panels buckling Vibration Cutouts Heterosis Hygrothermal environment

synthesis and characterization of rare earth metal doped tungsten trioxide photocatalyst for degradation of rhodamine b dye

在线全文

学校读者我要写书评

暂无评论

稀土学报:英文版 2023年第9期41卷 1302-1310,I0002页

作者： Pooja Nehra Amita Khatri Anil Kumar satyendra singh Pawan s.rana Department of Physics Deenbandhu Chhotu Ram University of Science and TechnologyMurthal1339SonipatHaryanaIndia special Centre for Nanoscience Jawaharlal Nehru University New Delhi10067India

Nowadays,it is concern for researchers that due to high recombination rate of photogenerated charge carriers in tungsten trioxide(WO_(3)) nanoparticles,the future applications are limited in the field of *** we attempt to synthesize tungsten trioxide nanoparticles with different doping concentrations of lanthanum i.e.2 wt%,4 wt%,6 wt% and 8 wt%.The synthesized samples were characterized by using various characterization techniques:X-ray diffraction(XrD),raman spectroscopy,Fourier transform infrared spectroscopy(FTIr),photoluminescence spectra(PL),transmission electron microscopy(TEM),energy dispersive X-ray(EDX) and UV-Vis ***_(3) retains its monoclinic structure even after doping which was confirmed by XrD *** helps to descry functional groups present in the *** size of nanoparticles was calculated by using *** confirms the absence of any impurity in the synthesized *** spectroscopy confirms the presence of a large number of imperfections induced in the lattice of WO_(3).The rate of recombination was analyzed by photoluminescence(PL) spectroscopy and is minimum in 4 wt% doping of *** optical bandgap was calculated using UV-Vis spectroscopy and becomes narrow along with the doping ***,it is found that doping of La in WO_(3) has considerably ameliorate the photocatalytic activity by reducing rate of recombination due to the trapping of electrons by defects introduced in the *** decolorization of rhodamine b(rhb) dye was performed and the values of c/c_0 and rate constant(k) confirm that the 4 wt% doping shows maximum degradation *** kinetic study for photodegradation of rhodamine b was done by using various kinetic models and results show that the reaction follows first order kinetics very ***,optimum doping of lanthanum increases the decolorization ability of WO_(3) towards rhb dye.

关键词： Photocatalytic activity WO_(3)nanoparticles rhodamine b dye rare earth doping Visible light

Geolocator study reveals east African migration route of Central European Common Terns

在线全文

学校读者我要写书评

暂无评论

Avian research 2020年第1期11卷 34-44页

作者： Jelena Kralj Milos Martinovic Luka Jurinovic Peter szinai szandra suto balint Preiszner Institute of Ornithology Croatian Academy of Sciences and ArtsGunduliceva 2410000 ZagrebCroatia Poultry Centre Croatian Veterinary InstituteHeinzelova 5510000 ZagrebCroatia balaton-felvideki National Park Directorate Csopak 8229Hungary Department of Limnology University of PannoniaVeszprem 8200Hungary balaton Limnological Institute MTA Centre for Ecological ResearchTihany 8237Hungary

background: The majority of European Common Terns(sterna hirundo) migrate south along the western coast of Europe and Africa, while birds from eastern regions are known to cross the Mediterranean sea from east to west or migrate along the eastern African coast. The migration route of north European terns wintering along the coast of western Africa was already described using geolocator data, while knowledge about movements of the European inland populations is based only on relatively scarce recoveries of ringed ***: We used light-level geolocators in inland Common Tern colonies in Hungary and Croatia to study their migration route and to identify wintering areas along with stopover sites. results revealed by geolocators were compared with recoveries of ringed ***: All tracked birds used the east African migration route with autumn stopovers at Lower Nile and in the southern part of the red sea, and short spring stopover in Israel. Terns wintered along Kenyan coasts and in the southern Mozambique Channel. Autumn migration lasted four times longer than spring ***: This is the first geolocator study that describes the east African migration route of the Common Tern. Important stopover sites were identified. More studies of inland populations are needed to better elucidate tern winter movements.

关键词： Inland population Light-level geolocators Mozambique Channel red sea sterna hirundo stopover sites Wintering area

Contribution of the Tourniquet in the Prevention of Haemorrhages during Myomectomies at the University Hospital of brazzaville

在线全文

学校读者我要写书评

暂无评论

Open Journal of Obstetrics and Gynecology 2018年第8期8卷 701-706页

作者： C. Itoua E. M. L. Eouani F. s. Okoko Ambeto N. s. b. Potokoué Mpia N. s. b. Potokoué Mpia P. s. Koko F. O. Atipo-Tsiba Galiba L. H. Iloki Obstetrics Gynaecology Department University Hospital of Brazzaville Brazzaville Congo Obstetrics Gynaecology Department Loandjili General Hospital Pointe Noire Congo Clinical Haematology Department University Hospital Brazzaville Brazzaville Congo

Objective: To check the effectiveness of tourniquet in the prevention of haemorrhage during myomectomies at the University Hospital of brazzaville. Patients and methods: Analytical cross-sectional study, conducted at the University Hospital of brazzaville from June 1, 2014 to June 30, 2016. recruitment was performed by randomly matching each case of myomectomy performed using a tourniquet with two cases of myomectomy without tourniquet (50 cases vs 100 witnesses). We used as a tourniquet, the surgical glove knotted and tightened sufficiently at the level of the isthmus of the uterus to temporarily occlude the uterine arteries to ensure haemostasis lasting no more than one hour. results: The mean age of the patients was similar in both groups (36, 1 ± 2.2 years vs 36.2 ± 1.9 years, P > 0.05). Menorrhagia was the most common indication of myomectomy in both groups (76% vs. 78% P > 0.05). The mean haemoglobin level of the patients before the myomectomies was 9.03 ± 1.10 g/dl vs 9, 75 ± 1.29 g/dl;P > 0.05. Intraoperative uterine features were similar in size (18 weeks gestation, 14 - 24) and number of myomas (5 vs 4, P > 0.05) in both groups. Polymyomectomy was more common in both groups (76% vs 73%, P > 0.05). blood loss was reduced in the tourniquet group (90.5 ± 4.6 ml vs 200.4 ± 5.6 ml;P 0.05), as well as the use of blood transfusion (8% vs 50%, P 0.05). Use of the number of sutures was reduced in the group with tourniquet (3 ± 0.2 vs 6 ± 0.2 P 0.05). The duration of the procedure was shorter in the group with tourniquet (51.5 ± 4 min vs 83 ± 7 min, P 0.05). Postoperative mean haemoglobin of patients was no different between the two groups (9.4 ± 0.7 g/dl vs 9.2 ± 0.5, P > 0.05). The overall cost of management was reduced in the group with tourniquet (190,680 ± 1450 F CFA vs 256,800 ± 2350 FCFA;P 0.05). Conclusion: The use of tourniquet during myomectomies significantly reduces blood loss and the use of blood transfusion. We also obtain the notorious reduction in th

关键词： Tourniquet Myoma Myomectomies Prevention Haemorrhage Cost brazzaville Congo

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

Denosumab治疗绝经后妇女低骨密度

世界核心医学期刊文摘（妇产科学分册） 2006年第8期2卷 1-2页

作者： Mc Clung M.r. Michael Lewiecki E. Cohen s.b. 马超 Oregon Osteoporosis Center 5050 NE Hoyt St Portland OR 97213 United States Dr.

background: receptor activator of nuclear factor- κ b ligand (rANKL) is essential for osteoclast differentiation, activation, and survival. The fully human monoclonal antibody denosumab (formerly known as AMG 162)- binds rANKL with high affinity and specificity and inhibits rANKL action. Methods: The efficacy and safety of subcutaneously administered denosumab were evaluated over a period of 12 months in 412 postmenopausal women with low bone mineral density (T score of- 1.8 to - 4.0 at the lumbar spine or- 1.8 to- 3.5 at the proximal femur). subjects were randomly assigned to receive denosumab either every three months (at a dose of 6, 14, or 30 mg) or every six months (at a dose of 14, 60, 100, or 210 mg), open- label oral alendronate once weekly (at a dose of 70 mg), or placebo. The primary end point was the percentage change from baseline in bone mineral density at the lumbar spine at 12 months. Changes in bone turnover were assessed by measurement of serum and urine telopeptides and bone-specific alkaline phosphatase. results: Denosumab treatment for 12 months resulted in an increase in bone mineral density at the lumbar spine of 3.0 to 6.7 percent (as compared with an increase of 4.6 percent with alendronate and a loss of 0.8 percent with placebo), at the total hip of 1.9 to 3.6 percent (as compared with an increase of 2.1 percent with alendronate and a loss of 0.6 percent with placebo), and at the distal third of the radius of 0.4 to 1.3 percent (as compared with decreases of 0.5 percent with alendronate and 2.0 percent with placebo). Near-maximal reductions in mean levels of serum C- telopeptide from baseline were evident three days after the administration of denosumab. The duration of the suppression of bone turnover appeared to be dose-dependent. Conclusions: In postmenopausal women with low bone mass, denosumab increased bone mineral density and decreased bone resorption. These preliminary data suggest that denosumab might be an effective treatment for o

关键词：骨密度 Denosumab 膦酸盐破骨细胞 rANKL 骨代谢骨质疏松人单克隆抗体安慰剂活