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Investigation on Bending and Creasing of Woven Fabrics under Low Curvature
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作者 Hu Jinlian.Shi FengjunThe Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong KongYu TongxiThe Hong Kong University of Science & Technology, Cleat Water Bay, Kowloon, Hong Kong. 《Journal of China Textile University(English Edition)》 EI CAS 1999年第2期26-31,共6页
Under the assumption of semi - circular form for a fabric bend, creasing of fabric strips and compression of fabric loops are analyzed by neglecting the structural complexity of the fabric. The relationship between th... Under the assumption of semi - circular form for a fabric bend, creasing of fabric strips and compression of fabric loops are analyzed by neglecting the structural complexity of the fabric. The relationship between the creasing force and deformation are deduced using an energy method and solutions are given for a linearly elastic material with constant internal frictional constraint. The agreements between the theoretical predictions and experimental results are very satisfactory. 展开更多
关键词 woven FABRIC BEND crease
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Configuration Synthesis and Analysis of Capture Origami Mechanism Based on Graph Theory
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作者 Hui Yang Chuanlu Zhu +3 位作者 Chuanyang Li Yan Wang Jiantao Yao Yongsheng Zhao 《Chinese Journal of Mechanical Engineering》 2025年第4期571-587,共17页
Origami mechanisms are extensively employed in various engineering applications due to their exceptional folding performance and deformability.The key to designing origami mechanisms lies in the design of the creases.... Origami mechanisms are extensively employed in various engineering applications due to their exceptional folding performance and deformability.The key to designing origami mechanisms lies in the design of the creases.The crease design is often derived from experience and inspiration,so it is crucial to have a systematic approach to crease design.In this paper,a novel synthesis approach based on graph theory is proposed,which effectively addresses the challenge of designing the creases in origami mechanisms.The essence of this method lies in the acquisition of the double symmetrical crease pattern through the directed graph product operation of two subgraphs.The crease pattern can be simplified by employing a technique that eliminates certain creases while preserving the non-isomorphism and symmetry of the pattern.An improved mixed-integer linear programming model is developed to achieve an automatic distribution of the peak_valley creases of the origami.The proposed method ultimately generates 12 unique double symmetrical crease patterns.The new method proposed in this paper,through systematic design,significantly improves the efficiency of mechanism design while opening up broad prospects for exploring new mechanism structures,thereby greatly expanding its application potential in cutting-edge fields such as aerospace engineering and intelligent robots. 展开更多
关键词 Configuration synthesis Crease design Origami mechanism Graph theory
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MOC Calls for Increasing Exports
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《China Chemical Reporter》 2009年第20期6-6,共6页
Recently the foreign trade department ofthe Ministry of Commerce(MOC)releaseda report claiming for spurring the exports.In the report,consumption,investmentand net exports drove China’s GDP to in-crease 4.7%,4.6% and... Recently the foreign trade department ofthe Ministry of Commerce(MOC)releaseda report claiming for spurring the exports.In the report,consumption,investmentand net exports drove China’s GDP to in-crease 4.7%,4.6% and 2.6% respectivelyin 2007,and their contributions were 4.2%,4.0% and 0.8% respectively in 2008. 展开更多
关键词 CONTRIBUTIONS crease DEPARTMENT RELEASED cording t
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Auricular dimensions in computed-tomography:Unveiling the relationship between ear dimensions,age,and sex using threedimensional volume rendering reconstructions
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作者 Bastian Schulz Michael Thali +1 位作者 Rahel Kubik-Huch Tilo Niemann 《World Journal of Radiology》 2024年第12期760-770,共11页
BACKGROUND The auricle,or auricula,defines the visible boundaries of the external ear and is essential in forensic investigations,including facial reconstruction and human remains identification.Beyond its forensic si... BACKGROUND The auricle,or auricula,defines the visible boundaries of the external ear and is essential in forensic investigations,including facial reconstruction and human remains identification.Beyond its forensic significance,auricular morphology attracts interest from various fields,such as medicine and industry.The size of the ears is culturally associated with health and longevity,while surgical techniques for ear reconstruction address both congenital and aesthetic concerns.AIM To determine whether known correlations with various measurements and observations regarding sex and age could also be established through computed tomography(CT).METHODS Computed tomography scans of the head from 342 females and 329 males aged 18 to 97 years(mean=60±19 years)were included in this study.Different auricular lengths,widths and perimeters were measured for both sides.Additionally,the preauricular area was assessed using three-dimensional volume rendering tech-nique images.RESULTS The measured auricular dimensions in centimeters are presented as mean values(right/left)for males(length 16.91±0.51/6.93±0.52;length 22.83±0.35/2.84±0.34;width 13.94±0.32/4.01±0.36;width 23.51±0.34/3.46±0.31;perimeter 17.66±1.25/17.71±1.28)and females(length 16.44±0.5/6.48±0.51;length 22.7±0.32/2.71±0.33;width 13.6±0.32/3.68±0.31;width 23.3±0.3/3.26±0.27;perimeter 16.36±1.2/16.46±1.2).A positive correlation with age was shown in all measurements,with the highest value for perimeter in both,males(r-value:right/left:0.49/0.47)and females(r-value:right/left:0.53/0.53).After confounding factors were excluded,the preauricular vertical line was first seen at 45 years.The mean age for males with preauricular vertical lines was 66.65±10.92 years(95%CI:63.99-69.3),while without vertical lines,it was 44.48±16.15 years(95%CI:41.21-47.74);for females,it was 70.18±12.44 years(95%CI:68.9-71.46)with and 47.87±17.09 years(95%CI:45.96-49.78)without vertical lines.CONCLUSION In this study,we pioneered the use of CT volumetric data to examine human auricle morphology and we achieved a precise 3D(pre-)auricular assessment.Sex-specific positive correlations between ear dimensions and age,as well as the mean age for the appearance of preauricular lines,were identified,providing valuable insights into the capabilities of modern CT devices. 展开更多
关键词 Auricular morphology Anterior tragal crease Aging Computed tomography Volume rendering technique Facial recognition
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中国转基因作物的环境安全评介与风险管理 被引量:10
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作者 吴孔明 刘海军 《华中农业大学学报》 CAS CSCD 北大核心 2014年第6期112-114,共3页
基因工程技术是21世纪最伟大的科学技术之一,基因工程技术的应用开启了一次全新的农业"绿色革命"。自1996年美国第一例商业化转基因作物诞生以来,全球转基因作物的种植快速平稳增长。转基因作物的种植具有巨大的潜在效益,但... 基因工程技术是21世纪最伟大的科学技术之一,基因工程技术的应用开启了一次全新的农业"绿色革命"。自1996年美国第一例商业化转基因作物诞生以来,全球转基因作物的种植快速平稳增长。转基因作物的种植具有巨大的潜在效益,但是其可能带来的环境风险已成为了人们关心和争论的焦点。转基因作物的安全性已然成为许多国家和政府不得不面对的主要议题之一。在过去的20年里。 展开更多
关键词 基因工程技术 环境风险 潜在效益 cotton PAPAYA 环境安全性 生产性试验 CROPS creased POPULATIONS
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FACTORS ANALYSIS ON IMPROVING THE PRODUCTIVITY OF THE NONFERROUS METALS INDUSTRY(2)
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作者 Productivity Research Group of the China National Nonferrous Metals Industry Corporation,Beijing 100814,China 《中国有色金属学会会刊:英文版》 CSCD 1993年第2期84-87,共4页
Our research and investigation proves thatthe growth rate of the productivity of thenonferrous metals industry is much lower thanthat of investment,and that the potential for in-creasing productivity iS very grear,in ... Our research and investigation proves thatthe growth rate of the productivity of thenonferrous metals industry is much lower thanthat of investment,and that the potential for in-creasing productivity iS very grear,in spite of thecompplicated influence of multiple weak joints re-strieting the increase of the productivity.To solvethese problems,following policies should 展开更多
关键词 SPITE PRODUCTIVITY creasing joints ADMINISTRATIVE HARDLY PLANNED SMELTING accounting nonferrous
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Wrinkling analysis of creased rectangular membrane
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作者 王长国 兰澜 谭惠丰 《Journal of Harbin Institute of Technology(New Series)》 EI CAS 2012年第3期88-94,共7页
In this paper,the wrinkle-crease interaction behavior of a rectangular membrane under edge tension is simulated.The creased membrane is modeled by using a Modified Two-Parameter model.In this model,two crease paramete... In this paper,the wrinkle-crease interaction behavior of a rectangular membrane under edge tension is simulated.The creased membrane is modeled by using a Modified Two-Parameter model.In this model,two crease parameters,i.e.the effective modulus of creased membrane and the residual stress from creasing,are computed by using MacNeal's method that was firstly applied directly in a flat membrane with the local crease.We have proposed a method to solve the wrinkling computing issue of the creased membrane by using a Direct Perturb-Force technique in our previous work.Based on our method,the effects of crease location on the wrinkle-crease interaction behavior can be evaluated accurately.These results will be of great benefit to the analysis and the control of the wrinkles in the membrane structures. 展开更多
关键词 MEMBRANE WRINKLING creasing
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Puppets Still Captivating Audiences
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《China & The World Cultural Exchange》 1993年第1期26-27,共2页
CHINESE puppet and shadowplays are said to date fromthe 11th century B.C.,reaching their peak of popularitybetween the 10th and 13th centu-ries.For thousands of years theyhave embodied the wit and artistryof Chinese a... CHINESE puppet and shadowplays are said to date fromthe 11th century B.C.,reaching their peak of popularitybetween the 10th and 13th centu-ries.For thousands of years theyhave embodied the wit and artistryof Chinese artists.Today’s 展开更多
关键词 COLORFUL STILL EMBODIED capture REACHING ancient Today creasing FICTION HANDS
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A STUDY ON THE PHYSICAL MECHANISM OF RESISTANCE OF MAIN POPLAR STRAINS AGAINST CRYPTORRHYNCHUS LAPATHIL.IN NORTH CHINA 被引量:1
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作者 Liu Jingquan Hou Aiju Ding Fujun Northeast Forestry University 《Journal of Northeast Forestry University》 SCIE CAS CSCD 1993年第1期91-106,共16页
The physical mechanism of resistance of poplar against Cryptorrhynchus lapathiL.is directly correlated with the morphological structure of bark,concerning the following 5aspects:1.It is correlated with whether surface... The physical mechanism of resistance of poplar against Cryptorrhynchus lapathiL.is directly correlated with the morphological structure of bark,concerning the following 5aspects:1.It is correlated with whether surface bark of larva transvered tunnel crack or not,ear-ly or late.Those that do not crack or crack late are susceptible strains while those that crack ear-ly are resistant strains.2.It is correlated with thickness of cork layer.Thick cork layer can in-crease resistance against pest while thin one is more susceptible to pest attack.3.It is related withage of tree.Trees at the age of 1-2 possess immunity to the pest,at 3-4 are relatively resistant,at5-8 are susceptible and over 9 are more resistant.4.It is also correlated with the rate of trees‘healing round the holes of larva tunnels.Those healing faster are resistant while those healingslower arc susceptible.5.It is related with the number of various scars on bark surface. 展开更多
关键词 POPLAR SUSCEPTIBLE TUNNELS crease faster concerning morphological cracking LARVAE immunity
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CLINICAL AND EXPERIMENTAL STUDIES OF JPYS IN REDUCING SIDE-EFFECTS OF CHEMOTHERAPY IN LATE-STAGE GASTRIC CANCER 被引量:1
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作者 余桂清 任德麟 +1 位作者 孙桂芝 张代钊 《Journal of Traditional Chinese Medicine》 SCIE CAS CSCD 1993年第1期31-37,共7页
This article reports a research project undertaken for more than 16 years by the Cancer Depart-ment of Guang An Men Hospital.Tonic Jian Pi Yi Shen (JPYS 健脾益肾),which nourishes thespleen and kidney,was used in combi... This article reports a research project undertaken for more than 16 years by the Cancer Depart-ment of Guang An Men Hospital.Tonic Jian Pi Yi Shen (JPYS 健脾益肾),which nourishes thespleen and kidney,was used in combination with chemotherapy in the treatment of late stage gas-tric cancer patients for the purpose of promoting completion of the chemotherapeutic course,im-proving the general condition,ameliorating the reaction in the digestive system,protectinghemopoiesis and strengthening immunocompetence.The results of lab experiments were found tocoincide with those of clinical application. 展开更多
关键词 COMPLETION DIGESTIVE SIDE 健脾益肾 promoting strengthening proving CHEMOTHERAPY counted creased
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Mechanism and Improvement of Straight Edge Seam Defect on Hot-rolled Plate Surfaces through Use of Chamfered Slabs 被引量:5
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作者 Hui ZHANG Peng HU Ming-lin WANG 《Journal of Iron and Steel Research International》 SCIE EI CAS CSCD 2016年第6期539-546,共8页
To improve the straight edge seam defect on hot-rolled steel plates,the deformation and temperature distribution of rectangular slabs and chamfered slabs during rolling in a pilot rolling experiment were analyzed in d... To improve the straight edge seam defect on hot-rolled steel plates,the deformation and temperature distribution of rectangular slabs and chamfered slabs during rolling in a pilot rolling experiment were analyzed in detail using the finite element method.The results showed that the crease formed on the lateral side near the edge of the plate as a result of uneven stress during broadside rolling.The creases rose to the surface with unrestricted spread and evolved into a straight edge seam during the subsequent straight rolling.To eliminate the straight edge seam defect,chamfered slabs were developed and investigated for rolling.The use of the chamfered slabs provided two advantages for rolling:the distribution of the temperature near the edge was ameliorated,and the deformation shape was improved by the chamfered shape.As a result,the risk of forming a straight edge seam defect was reduced by the use of a chamfered slab. 展开更多
关键词 straight rolled rolling eliminate subsequent corner rectangular defects crease tensile
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A New Catalyst in the Crease Recovery Finishing of Silk Fabrics with Epoxide 被引量:1
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作者 王建明 沈淦清 《Journal of Donghua University(English Edition)》 EI CAS 2004年第6期27-30,共4页
The paper here intends to discuss silk crease recovery finishing behavior with ED GE (ethylene diglycidal ether) in the presence of a new catalyst WSH. The results show that ED GE reacts with silk fibroin and forms cr... The paper here intends to discuss silk crease recovery finishing behavior with ED GE (ethylene diglycidal ether) in the presence of a new catalyst WSH. The results show that ED GE reacts with silk fibroin and forms cross linkages through ether bond. The formation of cross linking was examined by FITR spectroscopy, soluble time in acid solution and changes of amino acids. Handle of treated silk with catalyst WSH is better than that of silk treated with the traditional catalysts such as thiosulfates and thiocyanates. Finishing technique, physical properties of the finished silk fabrics and evaluation of cross linkages are discussed. 展开更多
关键词 Epoxide Catalyst Silk Crease RECOVERY FINISHING
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Wrinkle-crease interaction behavior simulation of a rectangular membrane under shearing 被引量:3
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作者 C.-G.Wang.H.-F.Tan.X.-D.He Center for Composite Materials,Harbin Institute of Technology,150080 Harbin,China Post-doctoral Research Center in Material Science and Engineering,Harbin Institute of Technology,150001 Harbin,China 《Acta Mechanica Sinica》 SCIE EI CAS CSCD 2011年第4期550-558,共9页
Wrinkling analysis of a rectangular membrane with a single crease under shearing is performed to understand the wrinkle-crease interaction behaviors. The crease is considered by introducing the residual stresses from ... Wrinkling analysis of a rectangular membrane with a single crease under shearing is performed to understand the wrinkle-crease interaction behaviors. The crease is considered by introducing the residual stresses from creasing and the effective modulus into the baseline configuration with assumed circular cross-sectional crease geometry. The wrinkling analysis of the creased membrane is then performed by using the direct perturb-force (DP) simulation technique which is based on our modified displacement components (MDC) method. Results reveal that the crease may influence the stress transfer path in the membrane and further change the wrinkling direction. The crease appears to improve the bending stiffness of the membrane which has an effective resistance on the wrinkling evolution. The effects of the crease orientation on wrinkle-crease interaction are studied toward the end of this paper. The results show that the wrinkling amplitude, wavelength, and direction increase as the crease orientation increases, and the wrinkling number decreases with the increasing crease orientation. These results will be of great benefit to the analysis and the control of the wrinkles in the membrane structures. 展开更多
关键词 Membrane structure - Wrinkle-crease interac-tion Membrane wrinkling Creased membrane
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Evaluation of hypoglycemic and hypolipidemic activity of methanol extract of Brassica oleracea 被引量:1
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作者 Tahira Assad Rafeeq.A.Khan Zeeshan Feroz 《Chinese Journal of Natural Medicines》 SCIE CAS CSCD 2014年第9期648-653,共6页
AIM: The hypoglycemic and hypolipidemic effects of the methanol extract of Brassica oleracea var. capitata(MEB) was evaluated in alloxan-induced diabetic rabbits. METHOD: The study was conducted on twenty-eight health... AIM: The hypoglycemic and hypolipidemic effects of the methanol extract of Brassica oleracea var. capitata(MEB) was evaluated in alloxan-induced diabetic rabbits. METHOD: The study was conducted on twenty-eight healthy white rabbits of either sex. All animals were equally divided into four groups. After confirmation of hyperglycemia, the animals of the treated and standard groups were administered MEB(500 mg·kg-1) and glibenclamide(10 mg·kg-1), respectively for 15 and 30 days. The animals of the normal and diabetic controls received normal saline 1 mL/day equivalent to the volume of doses given to the test and standard animals. Biochemical tests were performed at the end of dosing, i.e. the 16 th and 31 st days. RESULTS: The MEB revealed a decrease of 106.6 mg·dL-1 in fasting blood glucose as compared to diabetic control, which was almost comparable to glibenclamide; both of these changes were highly significant. The decrease in total cholesterol and low density lipoprotein was 94.3 and 96.5 mg·dL-1, respectively, whereas the high-density lipoprotein was increased by 26.7 mg·dL-1, as compared to diabetic control. All of the changes in lipid profile were statistically significant. CONCLUSION: These results suggest the potential of MEB as a hypoglycemic and hypolipidemic agent. 展开更多
关键词 methanol fasting confirmation comparable creased saline cholesterol antioxidant lipid approval
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Dyeing and printing industry:Scientific and technical progress,energy-saving and environmental protection have achieved balanced development Interview with Chen Zhihua,president of China Dyeing and Printing Association 被引量:1
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作者 Liang Long Xu Yuanyuan 《China Textile》 2016年第1期26-27,共2页
The general operation of dyeing and printing industry maintained a trend of slow stabilization during the 12th Five-Year Program period with obvious results in science and technology,management,energy conservation and... The general operation of dyeing and printing industry maintained a trend of slow stabilization during the 12th Five-Year Program period with obvious results in science and technology,management,energy conservation and environmental protection as well as the balanced development of the industries.Chen Zhihua,president of China Dyeing and Printing Association(CDPA),said that the dyeing and printing industry has in- 展开更多
关键词 PRINTING balanced PRESIDENT DYEING stabilization maintained pretreatment conservation creased elimination
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EFFECTS OF DIGITAL ACUPRESSURE ON THE CAPILLARY ARTERIOLAR FLOW IN CEREBRAL PlA MATER OF THE DOG
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作者 韩凤岳 王肇普 董旭京 《Journal of Traditional Chinese Medicine》 SCIE CAS CSCD 1989年第2期135-139,共5页
Effects of digital acupressure on the blood flowin the capillary arterioles of the cerebral pia matercovering the posterior sigmoidal gyrus in domesticdog(Canis familiaris)were observed.The speed ofblood flow was foun... Effects of digital acupressure on the blood flowin the capillary arterioles of the cerebral pia matercovering the posterior sigmoidal gyrus in domesticdog(Canis familiaris)were observed.The speed ofblood flow was found increased to 185% after con-tinuous digital acupressure for 20 minutes.The in-crease was most prominent 15 minutes after the acu-pressure was completed;the effect subsided in 30minutes.It was also found that in cases of low basalspeed of flow before digital acupressure,the increasein the speed of blood flow after acupressure was morepronounced. 展开更多
关键词 minutes GYRUS completed CAPILLARY crease markedly FRONTAL stimulation examining SENSORY
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QUESTIONS AND ANSWERS
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作者 杨秀娟 尹秀琨 《Journal of Traditional Chinese Medicine》 SCIE CAS CSCD 1997年第2期154-155,共2页
Houxi (SI 3) is an acupoint on the Small Intestine Channel of Hand-Taiyang, which is located, when a fist is clenched, on the ulnar side, proximal to the 5th metacarpophalangeal joint, at the end of the transverse cre... Houxi (SI 3) is an acupoint on the Small Intestine Channel of Hand-Taiyang, which is located, when a fist is clenched, on the ulnar side, proximal to the 5th metacarpophalangeal joint, at the end of the transverse crease and the junction of the red and white skin. The proper use of this point may bring about magical effect. 展开更多
关键词 ACUPOINT PROXIMAL junction crease manipulation SHOULDER NEEDLE transverse minutes stimulation
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EFFECT OF ACUPUNCTURE ANALGESIA ON SYNAPSFS OF NUCLEUS CENTRO—MEDIANUS OBSERVED WITH ELECTRO—MICROSCOPE
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作者 Luo Mingfu Wang Pingping Yang Youmi Institute of Acupuncture and Moxibustion,China Academy of Traditional Chinese Medicine.Beijing 100700 China 《World Journal of Acupuncture-Moxibustion》 1992年第3期35-37,共3页
The present study was aimed at the investigation of the ultrastructuralchanges of nucleus centromedianus(CM)of nuclei intralaminares under acupuncture analge-sia.The results of the observations on 18 healthy and adult... The present study was aimed at the investigation of the ultrastructuralchanges of nucleus centromedianus(CM)of nuclei intralaminares under acupuncture analge-sia.The results of the observations on 18 healthy and adult rats were as follows.1.Thesynapses of the CM belong mainly to the axodendricular synapses and also with some suc-cessive or juxtaposing synapses.2.The presynaptic sac contains a lot of round and clearvesicles,some granular vesicles also spread among clear vesicles in a few synapses.3.Theround clear synaptic vesicles of CM in the electroacupuncture analgesia(EA)group are de-creased significantly than that in the control group.It is suggested that CM plays a role inacupuncture analgesia. 展开更多
关键词 vesicles ANALGESIA SYNAPTIC acupuncture creased NUCLEI MICROSCOPE NUCLEUS GRANULAR aimed
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A review of studies of once-a-month oral contraceptives in China
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作者 孙亦彬 朱蓬弟 《生殖医学杂志》 CAS 1997年第S1期1-10,共10页
关键词 gregation contra disappear ESTROGEN CONTINUATION creased OVARY FIBRIN UTERUS thereafter
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China Gets Tough on Environmental Targets
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作者 Thomas Li 《China's Foreign Trade》 2014年第1期31-31,共1页
China promised to adopt"the strictest"environment and energy policies on December 25 as it has lagged behind in terms of four binding environmental tar-gets set for 2015,Xinhua News Agency reported.The four ... China promised to adopt"the strictest"environment and energy policies on December 25 as it has lagged behind in terms of four binding environmental tar-gets set for 2015,Xinhua News Agency reported.The four targets are for energy intensity,carbon dioxide emissions,rationalization of energy consumption and nitrogen oxide emissions。 展开更多
关键词 EMISSIONS adopt behind dioxide facilities creased
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