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1Two Novel Antifungal Saponins from Tibetan Herbal Medicine Clematis tangutica显示文摘Antifungal assay-guided isolation of the ethanol extract of the aerial parts of Clematis tangutica yielded two novel triterpene saponins. Their structures were determined to be 3-O-a-L-arabinopyranosyl hederagenin 28-O-a-L-rhamnopyranosyl ester (1) and 3-O-b-D- glucopyranosyl(14)-a-L-arabinopyranosyl hederagenin 28-O-a-L-rhamnopyranosyl ester (2) on the basis of spectral data and chemical reactions.Zhi Zhi DU, Na ZHU, Yue Mao SHEN* Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650204 2003Chinese Chemical Letters2003,14,7:20
2Expression of p57^(kip2), Rb protein and PCNA and their relationships with clinicopathology in human pancreatic cancer显示文摘AIM: To investigate the effects of inhibiting factor of cellcycle regulation p57kip2, retinoblastinoma protein (Rb protein)and proliferating cell nuclear antigen (PCNA) in the genesisand progression of human pancreatic cancer.METHODS: The expression of p57kip2, Rb protein and PCNAin tumor tissues and adjacent tissues of 32 patients withpancreatic cancer was detected with SP immunohistochemicaltechnique.RESULTS: p57kip2 protein positive-expression rate in tumortissues of pancreatic cancer was 46.9 %, which was lowerthan that in adjacent pancreatic tissues (75.0 %) (x2=5.317,P<0.05), p57kip2 protein positive-expression correlatedsignificantly with tumor cell differentiation (well-differentiationversus moderate or low-differentiation, P<0.05) but did notcorrelate significantly with lymph node metastasis (lymph nodemetastasis versus non-lymph node metastasis, P>0.05); Rbgene protein positive-expression rate in tumor tissues was50.0 %, which was also lower than that in adjacent pancreatictissues (78.1%) (x2=5.497, P<0.05); PCNA positive-expression rate was 71.9 %, being higher than that inadjacent pancreatic tissues (43.8 %) (x2=5.189, P<0.05),PCNA positive-expression also correlated significantly withtumor cell differentiation and lymph node metastasis (well-differentiation versus moderate or low- differentiation, lymphnode metastasis versus non-lymph node metastasis, P<0.05).Rb protein positive-expression rate in the tumor tissues ofp57kip2 protein positive-expression group was 53.3 %; andRb protein positive-expression rate in the tumor tissues ofp57kip2 protein negative-expression group was 47.1%. Therewas no significant relationship between the two groups(r=0.16507, P>0.05).CONCLUSION: The decreased expression of p57kip2, Rbprotein or over-expression of PCNA protein might contributeto the genesis or progression of pancreatic cancer, p57kip2,Rb protein and PCNA may play an important role in genesisand progression of pancreatic cancer.Hui Yue Yan-Li Na Xin-Li Feng Shu-Ren Ma Fu-Lin Song Bo Yang Department of Gastroenterology and Pathology, General Hospital of Shenyang Military Region, Shenyang 110016, Liaoning Province, China 2003World Journal of Gastroenterology2003,9,2:15
3Liver transplantation in China: problems and their solutions显示文摘BACKGROUND: The past decade has witnessed the rapid development of liver transplantation in China. The 1-year survival of liver transplant patients comes to 80% in many leading medical centers and the number of liver transplanta- tion is increasing. However, liver transplantation in China is facing several challenges including recipient with hepato- cellular carcinoma (HCC), recurrence of HCC and hepati- tis B, long-term postoperative care, the bridge to liver transplantation, and shortage of liver donor. This review was to understand the status of and problems in liver trans- plantation in China. DATA RESOURCES: An English-language literature search using MEDLINE (1990-2003) on liver transplantation and other related reports and review articles in Chinese from major transplant centers in China. RESULTS: HCC is one of the main indications for liver transplantation in China but different centers adopted dif- ferent criteria for selection of patients. Hepatitis B virus re- infection is a vital problem after liver transplantation in HBV-related patients. More and more attention was fo- cused on long-term postoperative care and donor shortage. Artificial liver support system has been applied in patients waiting for a graft in many centers. CONCLUSIONS: HCC remains to be one of the main indi- cations for liver transplantation in China; combined hepati- tis B immune globulin and lamivudine is considered effec- tive to prevent hepatitis B virus reinfection. Apart from long-term postoperative care for the improvement of the survival rate, early steroid withdrawal is feasible in liver transplantation. Living donor liver transplantation, split liv- er transplantation, and marginal donor transplantation can deal with donor shortage to some extent. Artificial liver as- sist system serves as a bridge to liver transplantation.Jian Wu and Shu-Sen Zheng Hangzhou, China Department of Hepatobiliary Surgery, First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310003 , Chi- na 2004Hepatobiliary & Pancreatic Diseases International2004,3,2:15
4Endoscopic management of biliary complications after orthotopic liver transplantation显示文摘BACKGROUND: Biliary complications are a serious problem in patients after liver transplantation and often require reoperation. This study was conducted to summarize the endoscopic diagnosis and management of biliary complications after orthotopic liver transplantation (OLT). METHODS: From December 2000 to November 2003, twelve endoscopic retrograde cholangiopancreatographies(ERCPs) were performed in 7 patients after OLT at Digestive Endoscopic Center of Changhai Hospital in Shanghai, China. The therapeutic maneuvers included endoscopic sphincterotomy (EST), biliary stent placement, balloon and basket extraction, irrigation, and nasobiliary tube placement. A retrospective study was made to determine the types of biliary tract complications after OLT. The success of ERCP and therapeutic maneuvers was also evaluated. RESULTS: Biliary tract complications including biliary stricture, biliary leak, biliary sludge, and stump leak of the cyst duct were treated respectively by endoscopic sphincterotomy with sludge extraction, stricture dilation or endoscopic retrograde biliary drainage. Two of the 3 patients with proximal common bile duct stricture were successfully treated with ERCP and stent placement. Four patients with anastomotic stricture and/without bile leak were treated successfully by dilation and stent placement or endoscopic nosobiliary drainage. No severe ERCP-related complications occurred. CONCLUSIONS: ERCP is an effective and accurate approach for the diagnosis of biliary tract complications after OLT, and placement of a stent is a safe initial treatment for biliary complications after liver transplantation.Yun-Sheng Qin, Zhao-Shen Li, Zhen-Xing Sun, Ren-Pei Wu, Na Wang and Yin-Zhen Yao Department of Hepatobiliary Surgery, First Affiliated Hospital, Zhejiang University, School of Medicine, Hangzhou 310003, China Department of Gastroenterology, Changhai Hospital, Second Military Medical University, Shanghai 200433, China 2006Hepatobiliary & Pancreatic Diseases International2006,5,1:11
5Catalytic oxidation of soot particulates over MnO_x-CeO_2 oxides prepared by complexation-combustion method显示文摘MnOx-CeO2 oxides prepared by complexation-combustion method were used for soot oxidation. The highest conversion rate of soot was obtained on a MnOx-CeO2 oxide prepared under mild acid condition of pH = 4, where the oxidation temperature corresponding to maximum activity was decreased more than 150℃ compared with that of un-catalytic soot oxidation. The structure and property of the catalysts were investigated by X-ray powder diffraction (XRD) and temperature programmed reduction (TPR). The results indicated that there were at least two kinds of Mn species present in MnOx-CeO2 catalysts, i.e. Mn ions within CeO2 lattice and high dispersion MnOx on the surface of CeO2. The presence of Mn ions in the CeO2 lattice improved the oxygen vacancy due to the charge difference, and the CeO2 considerably decreased the reduction temperature of MnOx. The capability to activate oxygen through the oxygen exchange between O2 in gas phase and lattice oxygen species in MnOx-CeO2 oxide contributed to the high catalytic activity for the reaction.Wenjuan Shan, Na Ma, Jiali Yang, Xiaowei Dong, Chang Liu, Lingling Wei Institute of Chemistry for Functionalized Materials, College of Chemistry and Chemical Engineering, Liaoning Normal University, Dalian 116029, Liaoning, China 2010Journal of Natural Gas Chemistry2010,19,1:11
6Upregulation of Divalent Metal Transporter 1 (DMT1) Is Involved in Amyloid Precursor Protein Processing and Aβ Generation显示文摘The amyloid beta precursor protein (APP) and its pathogenic byproduct β-amyloid peptide (Aβ) play central roles in the pathogenesis of Alzheimer’s disease (AD). Reduction inWei Zheng , 1, Na Xin , 1, Zhi-Hong Chi , Jie Zhang , Bo-Lu Zhao , Jia-Yi Li , Zhan-You Wang , 2 Key Laboratory of Cell Biology, Ministry of Public Health of China, Laboratory of Cell Engineering, China Medical University, Shenyang, PR China State Key laboratory of Brain and Cognitive Sciences, Institute of Biophysics, Academia Sinica, Beijing, PR China Department of Experimental Medical Science, Lund University, Sweden 2009生物物理学报2009,25,S1:8
7The input/removal rates of size-fractionated ^210Po in the Jiulongjiang estuary and its implications显示文摘The geochemical behaviors of dissolved (<0.4 mm), low molecular weight (<10 kDa) and colloidal (10 kDa- 0.4 mm) 210Po in surface waters from the Jiulongjiang estuary were examined and the input/removal rates of different 210Po species were estimated. Both dissolved and low molecular weight 210Po were considerably removed during estuarine mixing. However, colloidal 210Po was removed only at low salinity regions (S <15) but had input behavior at high salin-ity surface waters (S >15). The input/removal rates of three species indicate that 210Po was removed rapidly in the Jiu-longjiang estuary. The discrepancy of input/removal rates between 210Po species suggests different geochemical be-havior and a dynamic transformation between 210Po species. Low molecular weight 210Po may be more appropriate for characterizing the 210Po behavior in estuary zone than the traditional dissolved 210Po.YANG Weifeng, CHEN Min, HUANG Yipu, QIU Yusheng, ZHANG Lei, XING Na & LI Yanping Department of Oceanography, Xiamen University, Xiamen 361005, China Correspondence should be addressed to Huang Yipu (e-mail: yphuang@ jingxina.xmu.edu.cn) 2003Chinese Science Bulletin2003,48,21:8
8Comparison of the SchirmerⅠtest with and without topical anesthesia for diagnosing dry eye显示文摘·AIM:To determine the value of Schirmer Ⅰtest (SⅠt) without anesthesia and with topical anesthesia for diagnosing dry eye (DE). ·METHODS:Totally 220 eyes in 110 patients, male (44) and female (66), (39.56±12.67) years old diagnosed with DE were examined. SⅠt without anesthesia was performed firstly, and 15 minutes later, it was applied again in the same person after topical anesthesia with 0.5% proparacaine hydrochloride eye drops. The wetting strips counted <10mm per 5 minutes were defined positive, while ≤5mm per 5 minutes were defined strong positive. ·RESULTS:The wetting length in SⅠt after topical anesthesia was significantly lower than that in SⅠt without anesthesia(P < 0.001). The positive rate and strong positive rate of SⅠt after topical anesthesia were significantly higher than that of SⅠt without anesthesia (P <0.001). The positive rate and strong positive rate of SⅠt without anesthesia and the strong positive rate of SⅠt after topical anesthesia in patients with aqueous-deficiency dry eye (ADDE) were significantly higher than those in total patients whereas those in patients with evaporative dry eye (EDE) were significantly lower than those in total patients (P <0.001). ·CONCLUSION:SⅠt after topical anesthesia with 0.5% proparacaine hydrochloride eye drops is more objective and reliable than that without anesthesia in reflecting the status of DE, and its diagnostic value in patients with ADDE was even higher, making itself a meaningful evidence for the diagnosis and treatment of DE.Na Li, Xin-Guo Deng, Mei-Feng He State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou 510060, Guangdong Province, China 2012International Journal of Ophthalmology(English edition)2012,5,4:7
9Evaluation of germ-cell kinetics in infertile patients with proliferating cell nuclear antigen proliferating index显示文摘To explore the usefulness of proliferating cell nuclear antigen proliferating index (PCNA PI) in the pathological diagnosis and treatment of male infertility. Methods: Testicular biopsy specimen obtained from 48 cases of male infertility and 2 normal controls were fixed and embedded. The sections were stained with anti-PCNA monoclonal antibodies or haematoxylin/eosin. Proliferating index (PI), expressed as the percentage of germ-cell nuclei positively stained with PCNA antibody, was assessed from more than 20 seminiferous tubules or 600 germ-cells. Results: The infertile patients were divided into 4 groups: Group 1, normal spermatogenesis ( 14 cases); Group 2, hypospermatogenesis (16 cases); Group 3, germinal arrest (10 cases); Group 4, Sertoli cell only syndrome (8 cases). The PCNA PI of normal control testis was 86.5% (mean value). Group 3 had a significantly lower PCNA PI (29.8%) than normal testis; Group 1 and 2 had similar Pis (82.3% and 82.3%, respectively) as the control testis. PI of the negative control (Group 4) was 0 as no germ-cells were found. Conclusion: PCNA PI is useful for assessing germ-cell kinetics, especially for pathological diagnosis of germinal arrest which is difficult to differentiate by routine HE staining technique. In germinal arrest, there is a significantly lowered PCNA PI, which is an indication of DNA synthesis deterioration, suggesting the use of therapies be different from those for hypospermatogenesis.Li ZENG, Xiang-Tian KONG, Jin-Wei SU, Tong-Li XIA Yan-Qun NA Ying-Lu GUO Institute of Urology,Peking University, Beijing 100034, China 2001Asian Journal of Andrology2001,3,1:7
10The Production of Organic-Inorganic Compound Film-Coated Urea and the Characteristics of Its Nutrient Release显示文摘The effect of different concentrations of natural macromolecular compound on the characteristics of nutrient release in the membrane materials of organic-inorganic compound film-coated urea was discussed, and the optimal concentrations for better nutrient release was proposed. The characteristics of nutrient release of film-coated urea were evaluated by soil column leaching experiment. Organic-inorganic compound film-coated urea showed good characteristics of nutrient release, which could be well simulated by Logistic curve. The two parameters in this curve, a and r, can be used to present nutrient release of film-coated urea, and followed the order of B > C > A and C < B < A, respectively, indicating that the release was stronger with the increasing concentration of natural macromolecular compound in the membrane, which implied better controllability of nutrient release. The concentration of 5% of natural macromolecular compound showed better characteristic of nutrient release and can be utilized as a membrane material combined with inorganic mineral powders to develop film-coated slow-release fertilizer.ZOU Hong-tao, WANG Yao-sheng, SONG Hao-wen, HAN Yan-yu, YU Na, ZHANG Yu-ling, DANG Xiu-li, HUANG Yi and ZHANG Yu-long College of Land and Environmental Sciences, Shenyang Agricultural University/Liaoning Key Laboratory of Agricultural Resources and Environment/Northeast Key Laboratory of Soil and Environment, Ministry of Agriculture, Shenyang 110161, P.R.China 2009Agricultural Sciences in China2009,8,6:6
11Two New Oleanene-Type Triterpenoid Saponins from Pueraria peduncularis显示文摘From the radix of Pueraria peduncularis Grab., two new oleanene-type triterpenoid saponins named pedunsaponins B (2) and C (3) were isolated. Their structures were determined as 3-O-(6-O-methyl)-β-D-glucuronopyranosyl -3β.15a-diol-12-oleanene-16-one (2) and 3-O-β- Dglucopyranosyl-(1 -3)-β-D-glucuronopyranosyl-3β. 15a-diol- 12-oleancne- 16-one (3) on the basis of spectroscopic evidence and chemical reactions.Na Ll~1 Zhi Da MIN~1 Hou Ming WU~2 (1 Department of Natural Products Chemistry, China Pharmaceutical University, Nanjing 210009 2 State Key.Laboratory of Bio-organic and Natural Products Chemistry. Shanghai Institute of Organic Chemistry. Chinese Academy 2000Chinese Chemical Letters2000,11,4:5
12Influence of norcantharidin on proliferation,proliferation-related gene proteins prolifera-ting cell nuclear antigen and Ki-67 of human gallbladder carcinoma GBC-SD cells显示文摘BACKGROUND: Gallbladder carcinoma is a highly lethal and aggressive disease with early metastasis, strong invasion and poor prognosis. Most patients with this disease are at the advanced and un-resectable stage and should be consi- dered for palliative treatment such as chemotherapy and ra- diotherapy. Unfortunately, reports of chemotherapy and radiotherapy for gallbladder carcinoma are disappointing. We investigated the influence of norcantharidin (NCTD) on proliferation, proliferation-related gene proteins PCNA and Ki-67 of human gallbladder carcinoma GBC-SD cells in vitro. METHODS: GBC-SD cell lines of human gallbladder carci- noma were cultured by the cell culture technique. The ex- periment was divided into NCTD group and control group. The tetrazolium-based colorimetric assay was used to evaluate cell growth. The streptavidin-biotin complex method was used to determine the expressions of prolifera- tion-related gene proteins PCNA and Ki-67 of human gall- bladder carcinoma GBC-SD cells. RESULTS: NCTD inhibited the growth and proliferation of GBC-SD cells from 10 mg/L or after 6 hours in a dose- and time-dependent manner, with the IC50 value of 56.18 μg/ ml at 48 hours. After treatment with NCTD, the expression of PCNA (0.932 ±0.031 vs. 0.318 ±0.023, P<0.001) and Ki-67 (0.964 ±0.092 vs. 0.297 ±0.018, P<0.001) proteins were decreased significantly. CONCLUSION: NCTD inhibits the proliferation of human gallbladder carcinoma GBC-SD cells in vitro and the expres- sion of their proliferation-related gene proteins PCNA and Ki-67.Yue-Zu Fan, Jin-Ye Fu, Ze-Ming Zhao and Cun-Qiu Chen Shanghai, China Department of Surgery, Tongji Hospital of Tongji U- mversity, Shanghai 200065, China Department of Surgery, Pudong People’ s Hospital, Shanghai 201200 , Chi- na 2004Hepatobiliary & Pancreatic Diseases International2004,3,4:5
13Generality and characteristics of genetic and epigenetic changes in newly synthesized allotetraploid wheat lines显示文摘Previous studies have shown rapid and extensive genomic instability associated with early stages of allopolyploidization in wheat.However,these studies are based on either a few pre-selected genomic loci or genome-wide analysis of a single plant individual for a given cross combination,thus making the extent and generality of the changes uncertain.To further study the generality and characteristics of allopolyploidization-induced genomic instability in wheat,we investigated genetic and epigenetic changes from a genome-wide perspective(by using the AFLP and MSAP markers) in four sets of newly synthesized allotetraploid wheat lines with various genome constitutions,each containing three randomly chosen individual plants at the same generation.We document that although general chromosomal stability was characteristic of all four sets of allotetraploid wheat lines,genetic and epigenetic changes at the molecular level occurred in all these plants,with both kinds of changes classifiable into two distinct categories,i.e.,stochastic and directed.The abundant type of genetic change is loss of parental bands while the prevalent cytosine methylation pattern alteration is hypermethylation at the CHG sites.Our results have extended previous studies regarding allopolyploidization-induced genomic dynamics in wheat by demonstrating the generality of both genetic and epigenetic changes associated with multiple nascent allotetraploid wheat lines,and providing novel insights into the characteristics of the two kinds of induced genomic instabilities.Bao Qi 1,Xiaofang Zhong 1,Bo Zhu,Na Zhao,Liying Xu,Huakun Zhang,Xiaoming Yu,Bao Liu Key Laboratory of Molecular Epigenetics of MOE and Institute of Genetics & Cytology,Northeast Normal University,Changchun 130024,China 2010Journal of Genetics and Genomics2010,37,11:5
14Tolerance of Physocypria kraepelini (Crustacean, Ostracoda) to water-borne ammonia, phosphate and pH value显示文摘This study evaluated the median lethal concentration (LC50) and safe concentration of water-borne ammonia, phosphate and pH value on Physocypria kraepelini, a freshwater Ostracoda with a static renewal test system. The results indicated that the LC50 values of ammonia for P. kraepelini were 1026.71, 859.98, 771.79 and 583.82 mg/L at 24, 48, 72 and 96 h exposure, respectively, and the safe concentration range of ammonia for the long-term survival of P. kraepelini was less than 58.38 mg/L. The safe range of pH value for the survival of P. kraepelini was from 6.59 to 7.61. P. kraepelini has a high tolerance to ammonia, phosphate and pH value which are the main environmental factors in the serious eutrophication water.YU Na, CHEN Shimei, LI Erchao, CHEN Jiayan, CHEN Liqiao School of Life Science, East China Normal University, Shanghai 200062, China 2009Journal of Environmental Sciences2009,21,11:4
15Effect of acute alcoholism on hepatic enzymes and oxidation/antioxidation in rats显示文摘BACKGROUND: Around the world more and more people suffer from acute alcoholism. The purpose of this study was to determine hepatic enzymes and oxidation/antioxidation in rats with acute alcoholism. METHODS: Rats were randomly divided into three groups; control, low-dose alcohol, and high-dose alcohol. Each al- cohol group ( n = 12) was intravenously infused with etha- nol at a dose of 0.3 or 0.7 g/kg body weight respectively. The control group (n =11) was intravenously infused with normal saline at a dose of 0.5 g/kg body weight. Blood was collected for detection of hepatic enzymes and index of oxidation/antioxidation. RESULTS: The ratio of AST to ALT was 2.44±0.46, 2.57± 0.60 and 3.03 ±0.46 in the three groups, and the difference was significant between the control and high-dose alcohol groups (P^0.05). No significant changes were observed in the levels of serum alanine aminotransferase (ALT), aspar- tate aminotransferase (AST), total protein (Tp), albumin (Alb), alkaline phosphatase (ALP), cholinesterase (ChE), total bilirubin (TB), C-reactive protein (CRP) and amy- lase. The levels of serum nitric oxide (NO) in the 3 groups were 39.2 ±73.25 mol/L, 42.30 ±4.60 mol/L and 47.86± 4.66 mol/L, and significant difference was seen between the control group and the high-dose alcohol group (P < 0.01). No significant difference was found in the levels of serum superoxide dismutase (SOD), glutathione (GSH), malondiethylaldehyde (MDA), and CRP in the 3 groups. CONCLUSION: The ratio of AST to ALT appears to be a useful index for acute alcohol intoxication. NO is involved in the mechanism of acute alcohol intoxication.You-Ming Li, Shao-Hua Chen, Chao-Hui Yu, Yu Zhang and Gen-Yun Xu Hangzhou, China Department of Digestive Medicine, First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310003 . Chi- na 2004Hepatobiliary & Pancreatic Diseases International2004,3,2:3
16Construction of sperm-specific lactate dehydrogenase DNA vaccine and experimental study of its immuno-contraceptive effect on mice显示文摘Lactate dehydrogenase C4 (LDHC4) is a key enzyme for sperm metabolism. It is distributed specifically in testis and is highly immunogenic. In this study, two DNA vaccines pVAX1-hLDHC and pVAX1-mLDHC were constructed by inserting coding sequences of human and mice LDHC4 into the eukaryotic ex-pression vector pVAX1. The production of LDHC4 specific antibodies was induced in the sera of vac-cinated mice and the reproductive tract secretions of vaccinated female mice through immunization by mucosal surface instillation. Furthermore, the antibody titer increased with the times of immunization. In the mating experiment, the number of newborns of the vaccinated mice reduced significantly and some immunized female mice even lost the ability to bear any offsprings, suggesting that the difference between the immunized and control mice was statistically significant. Sperm agglutination analysis indicated that both the antisera from immunized mice and the reproductive tract secretions of vacci-nated female mice could agglutinate normal sperms. Results of immunohistochemistry showed that the antibodies present in the sera of immunized mice and the reproductive tract secretions of vaccinated female mice could specifically react with LDHC4 antigen, which mainly locates in the cytoplasm, acrosome membrane externa and acrosome capsule of the sperm. Taken together, our results indicated that the constructed contraceptive DNA vaccines did yield immunocontraceptive effects on mice and this would enable clinical trials in near future.CHEN Yong*, ZHANG Duo*, XIN Na, XIONG YongZhong, CHEN Ping, LI Bo, TU XiangDong & LAN FengHua Research Laboratory of Medical Genetics, PLA Institute of Technology for Birth Control, Fetal Health and Child Growth, Fuzhou General Hospital of Nanjing Military Region, Fuzhou 350025, China 2008Science China(Life Sciences)2008,51,4:3
17Challenges in the diagnosis and treatment of transsexualism in contemporary China显示文摘According to the International Classification of Diseases10th Edition(ICD-10),[1]transsexualism refers to thecondition where an individual desires to live and to beaccepted as someone of the gender which is oppositetheir biological sex.It is usually accompanied withdiscomfort or distress about their anatomic sex.In somecases,individuals with this condition modify their bodyfeatures using laser or plastic surgeries toNa LIU Zheng LU Shanghai Mental Health Center, Shanghai Jiao Tong University School of Medicine Department of Psychiatry, Tongji University, Tongji Hospital 2014上海精神医学2014,26,1:3
18Color 3D Reverse Engineering显示文摘This paper presents a principle and a method of col or 3D laser scanning measurement. Based on the fundamental monochrome 3D measureme nt study, color information capture, color texture mapping, coordinate computati on and other techniques are performed to achieve color 3D measurement. The syste m is designed and composed of a line laser light emitter, one color CCD camera, a motor-driven rotary filter, a circuit card and a computer. Two steps in captu ring object’s images in the measurement process: First, the color CCD camera ta kes the color picture of the object to be used for texture mapping in post proce ssing. Secondly, the monochrome data of the object is taken. The laser light emi tter is started; the light plane and the surface of the object intersect to form an undulate line, which forms an image on the CCD sensor. After the optic- electronics transformation, the electronic signals are captured and send to the computer. A new color 3D measurement model was derived, and a rapid calibra ting method to measure the system parameters was proposed--optical plane equat ion calibrating method. A calibrating drone was designed and built. 3D color sca nning system not only provides an object’s individual point information in the 3D coordinate, in the mean time, it provides the color information of each indiv idual point. This paper also advances a multi-frame auto-merging method, i.e. several frames of color 3D digital images measured are merged quickly according to their curvature characteristics and RGB information. Initial matching and fin e tune of the registration are completely performed by the computer; initial mat ching is via user interface in helping computer to find the transformation matri x. The transformation matrix is found according to the geometric characteristics chosen by hand. After the initial transformation matrix is found, fine tune of the registration is preformed to do the optimum adjustment to achieve a complete color textured 3D model. The system can be broadly used in the fields of produc t design, mold manufacture, multimedia, game development, animation, medical eng ineering, antique digitization, etc.XU Zhi-qin 1, YE Sheng-hua 1, FAN Guang-zhao 2 (1. School of Precision Instrument and Opto-electronics Engineering, N ational Key Lab of Measurement Technology and Instrument, EMC, Tianjin University, Tianjin, China 2. Department of Mechanical Engineering, National Taiwan University, Taiwan, Chi na) 2002厦门大学学报(自然科学版)2002,41,S1:3
19A New Compound from the Root of Salvia przewalskii Maxim显示文摘Neo-przewaquinone A was isolated from the root of Salvia przewalskii Maxim. The structure elucidation and 1H, 13C NMR assignments were achieved by spectroscopic method.Wan Sheng CHEN*, Zhao Yang TAO, Wei Dong ZHANG, Lian Na SUN School of Pharmacy, Second Military Medical University, Shanghai 200433 2003Chinese Chemical Letters2003,14,7:3
20A General Introduction of the Main Similarities and Differences between the Three Translation Models显示文摘This study focuses on the three translation models,the Jerome model,the Horace model,the Schleiermacher model.The study intends to compare the three models,there are some similarities and differences between the three models.By analyzing two kinds of the translation strategies,literal translation and free translation,this study argues that different source texts need different translation strategies.Translators should know the proper translation strategies and rich knowledge.Honghe University,School of Foreign Languages Na Mengjiao 2011科技信息2011,,8:3
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