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Biomedical and Environmental Sciences 2022年第11期35卷 992-1000页

作者： liu Hong Lei liu ya Li SUN Fang yan LI Zong Chao TAN Hong Yu XU Ying Chun Key Laboratory of Carcinogenesis and Translational Research(Ministry of Education Beijing)Department of AnesthesiologyPeking University Cancer Hospital&InstituteBeijing 100142China Graduate School Capital Medical UniversityBeijing 100069China Department of Laboratory Medicine Peking Union Medical College HospitalPeking Union Medical CollegeBeijing 100730China Graduate School Peking Union Medical CollegeChinese Academy of Medical SciencesBeijing 100730China Beijing Key Laboratory for Mechanisms Research and Precision Diagnosis of Invasive Fungal Diseases(BZ0447) Beijing 100730China Infection Control Department Peking Union Medical College HospitalPeking Union Medical CollegeBeijing 100730China

Objective To investigate the baseline levels of microorganisms’growth on the hands of anesthesiologists and in the anesthesia environment at a cancer *** This study performed in nine operating rooms and among 25 anesthesiologists at a cancer *** of the hands of anesthesiologists and the anesthesia environment was performed at a ready-to-use operating room before patient contact began and after *** Microorganisms’growth results showed that 20%(5/25)of anesthesiologists’hands carried microorganisms(>10 CFU/cm^(2))before patient contact *** anesthesiologists performed hand hygiene better than did their male counterparts,with fewer CFUs(P=0.0069)and fewer species(P=0.0202).Our study also found that 55.6%(5/9)of ready-to-use operating rooms carried microorganisms(>5 CFU/cm^(2)).Microorganisms regrowth began quickly(1 hour)after disinfection,and increased gradually over time,reaching the threshold at 4 hours after *** aureus was isolated from the hands of 20%(5/25)of anesthesiologists and 33.3%(3/9)of operating *** Our study indicates that male anesthesiologists need to pay more attention to the standard operating procedures and effect evaluation of hand hygiene,daily cleaning rate of the operating room may be insufficient,and we would suggest that there should be a repeat cleaning every four hours.

关键词： Hand hygiene Anesthesiologists Contamination Anesthesia environments

A new cyclodipeptide from the cultures of Geotrichum candidum

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Chinese Chemical Letters 2007年第9期18卷 1081-1083页

作者： ya Nan liu Jing Hua Xue Na Feng Ping Wu Xing Zhong liu Xiao Yi Wei South China Botanical Garden Chinese Academy of Sciences Guangzhou 510650 China Institute of Microbiology Chinese Academy of Sciences Beijing 10080 China Graduate University of Chinese Academy of Sciences Beijing 100049 China

A new cyclodipeptide, cyclo(phenylalanyl-N-methyltyrosyl) 1, was isolated from the mycelial solid cultures of Geotrichum candidum. Its structure was elucidated by spectroscopic methods. The antifungal activity of the ... 详细信息

关键词： Cyclo(phenylalanyl-N-methyltyrosyl) Cyclodipeptide Geotrichum Geotrichum candidum Peronophythora litchi Antifungal activity

Efficient Scalar Multiplication for Elliptic Curves over Binary Fields

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Wuhan University Journal of Natural Sciences 2008年第6期13卷 717-720页

作者： GU Haihua GU Dawu liu ya School of Electronic lnforamation and Electrical Engineering Shanghai Jiao Tong University Shanghai 200240 China

Scalar multiplication [n]P is the kernel and the most time-consuming operation in elliptic curve cryptosystems. In order to improve scalar multiplication, in this paper, we propose a tripling algorithm using Lopez and Dahab projective coordinates, in which there are 3 field multiplications and 3 field squarings less than that in the Jacobian projective tripling algorithm. Furthermore, we map P to（φε^-1（P）, and compute [n]（φε^-1（P） on elliptic curve Eε, which is faster than computing [n]P on E, where φε is an isomorphism. Finally we calculate （φε（[n]φε^-1（P）） = [n]P. Combined with our efficient point tripling formula, this method leads scalar multiplication using double bases to achieve about 23% improvement, compared with Jacobian projective coordinates.

关键词： elliptic curve cryptosystem scalar multiplication double-base number system projective coordinates

Turbulence Modulations in the Boundary Layer of a Horizontal Particle-Laden Channel Flow

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Chinese Physics Letters 2010年第6期27卷 129-132页

作者： LI Jing liu Zhao-Hui WANG Han-Feng CHEN Sheng liu ya-Ming HAN Hai-Feng ZHENG Chu-Guang State Key Laboratory of Coal Combustion Huazhong University of Science and Technology Wuhan 430074

Turbulence modulations are experimentally investigated using particle image velocimetry （PIV） in the lower boundary layer of a fully developed horizontal channel flow. A simultaneous two-phase PIV measurement technique is adopted to acquire the turbulent statistics quantities and to examine the coherent structures in the near-wall region. Polythene beads with diameters of 60 μm are used as dispersed phases, and the PIV measurements have been performed at three mass loadings varying from 2.5 ×10^-4 to 5 × 10^-3. All the experiments are performed at a wall shear Reynolds number of Reτ = 430. The results show that the presence of the particles suppresses the coherent structures, with shorter streamwise extent of the quasistrearnwise structures, and then, the wall-normal velocity fluctuations and shear Reynolds stresses are both decreased in the near-core region. In addition, as a result of the particle wake, the turbulence intensity and shear Reynolds stress both increase in the vicinity of the wall. Due to the drag effects of the particles on the gas, the streamwise velocity gradients decrease in the outer region and increase in the viscous sublayer, meanwhile the thickness of the viscous sublayer also decreases. These results cause the peak values of the streamwise velocity fluctuations adjacent to the wall to increase, and the peak positions shift to the wall. This is the reason for decreasing the near-wall region and increasing the near-core region of the streamwise velocity fluctuations in appearance.

关键词： Uses Experimentation Measurement Walls Dispersants Stress Timing Time Shears Shearing

Complete colonic duplication presenting as hip fistula in an adult with pelvic malformation:A case report

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World Journal of Clinical Cases 2022年第30期10卷 11037-11043页

作者： Xuan Cai Jing-Tao Bi Zhi-Xue Zheng ya-Qi liu Department of General Surgery Beijing Jishuitan HospitalBeijing 100035China

BACKGROUND Alimentary tract duplication(ATD) is a rare congenital ***,a case of ATD with a complete colonic duplication isolated in the abdominal cavity with a fistula and multiple malformations is very *** characteristics show the variability of this disease and explain why it tends to be challenging to diagnose and *** SUMMARY A 25-year-old woman with a history of a fistula opening in her right hip since birth presented with the irregular discharge of foul fluid from the fistula and intermittent abdominal ***-enhanced computed tomography and magnetic resonance imaging findings revealed a duplicated tube isolated in her abdominal pelvic cavity along with a pelvic malformation and double *** foot radiographic examination showed pes *** surgery,the tube appeared to be an almost complete colonic structure and was verified to be connected to the *** of the involved tissue and fistula were removed,and the defect in the pelvic floor was closed by suturing after *** 8 mo,the postoperative follow-up has been *** ATD may be a differential diagnosis in sinus tract *** combined with open surgery is a viable treatment option.

关键词： Abdominal pain Colonic duplication Computed tomography Hip fistula Pelvic malformation Laparoscopy Case report

Swell Source Analysis of East China Sea Under the Influence of Typical Typhoon Scenarios

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China Ocean Engineering 2020年第2期34卷 210-222页

作者： yaN Jin TAO Ai-feng LIN Yi-nan PEI Ye liu ya-yi SU Jun-wei Key Laboratory of Coastal Disaster and Defence(Hohai University) Ministry of EducationNanjing 210098China College of Harbour Coastal and Offshore EngineeringHohai UniversityNanjing 210024China Xiamen Branch of PICC Property and Casualty Company Xiamen 361000China China Three Gorges New Energy Co Ltd.Jiangzhe CompanyYancheng 224000China

The characteristics of swells within the East China Sea have been reported by Tao et al.(2017),while the question of where the swells come from remains *** using the wave model WAVEWATCH III and the swell tracking method proposed by Hanson(2001),the spatial sources of the swells are investigated during four typical typhoon scenarios,which usually affect the wave environment in the East China Sea,including the Recurving type,the Northward type,the Westward type(striking the East China Sea)and the Westward type(over the South China Sea).The numerical results show that parts of the swells are from the North West Pacific with a long-distance *** moving paths of the swells are affected by the typhoon tracks,which result in various *** Westward type(over the South China Sea)makes one peak in the evolution *** landing process of the Westward type(striking the East China Sea)could result in swells with low *** swell energy depends on swell propagation distance,existence time and wind intensity of generation *** consistent fetch and forceful wind intensity make swell carry more energy.

关键词： swells East China Sea effect factor typhoon track

Immunization of Male Mice with a New Recombinant GnRH Fusion Protein Reduces the Testicular Function

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Agricultural Sciences in China 2009年第3期8卷 380-385页

作者： FANG Fu-gui yaNG ya-ping liu ya ZHANG Yun-hai TAO Yong WANG Suo-lu PU Yong ZHANG Xiao-rong Department of Animal Medicine College of Animal Science and Technology Anhui Agricultural University Hefei 230036 P.R.China Department of Animal Science College of Animal Science and Technology Anhui Agricultural University Hefei 230036 P.R.China

The objective of the present study was to evaluate the effect of an immunogenic maltose-binding protein-gonadotropin releasing hormone （GnRH-6-MBP） using genetic engineering. The synthetic mammalian tandem repeated GnRH hexamer gene was inserted into the expression plasmid pMAL-c2x. Recombinant GnRH-6-MBP protein was over- expressed in *** strain BL21. Amylose resin with affinity chromatograph was used to purify target protein. The reactiongenicity of fusion protein was identified by indirect enzyme linked immunosorbent assay （ELISA）, and the antigenicity and biological effects of GnRH-6-MBP were tested in mice. In the experiment, 20 male Kunming white mice of 20 d old were randomly divided into treatment and control group. Ten mice were immunized with 100 μg GnRH-6-MBP administered subcutaneously （s.c.） thrice at 2-week intervals with GnRH-6-MBP. Mice were sacrificed after 3 weeks following the booster injection, the testis was removed, weighed and measured, and the histological structure was observed. The reactiongenicity of fusion protein to GnRH antibody was much higher than the control. Active immunization against GnRH-6-MBP reduced remarkably （P 〈 0.01） the length and weight of the testis, and shortened the girth and width of the testis （P 〈 0.05）, and suppressed testicular spermatogenesis compared to the control mice. These results indicate that the recombinant GnRH-6-MBP acted as a strong immunogen and caused atrophy of the testis.

关键词： GnRH recombinant vaccine maltose-binding protein (MBP) immunocastration

Silicone Elastomer with High Elongation at Break Used in Digital Light Processing 3D Printing

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Chinese Journal of Polymer Science 2023年第11期41卷 1786-1795,I0010页

作者： Tian-Xin Yu ya-Yuan liu Fu-Yue Tian Nan-Ying Ning Bing Yu Ming Tian State Key Laboratory of Organic-Inorganic Composites Beijing University of Chemical TechnologyBeijing 100029China Beijing Advanced Innovation Center for Soft Matter Science and Engineering Beijing University of Chemical TechnologyBeijing 100029China Key Laboratory of Carbon Fiber and Functional Polymers Ministry of EducationBeijing University of Chemical TechnologyBeijing 100029China

3D printing silicone elastomer has demonstrated great potential in diverse areas such as medical devices,flexible electronics and soft *** is of great value to investigate how to improve the mechanical properties,including tensile strength and elongation at break of printed *** this work,a light curing system that can be applied in silicone elastomer 3D printing is explored,which is composed of vinyl terminated polysiloxane as the macromer and thiol containing polysiloxane as the crosslinking agent,and a chain extension reaction is also introduced into this light curing system via the addition of the chain extender dithiol molecules,and a light curing system accompanied with chain extension is designed and realized based on the thiol-ene click reaction *** reinforced with silica fillers,the obtained light curing system can endow the light curing silicone elastomer with better mechanical properties under the condition of a lower viscosity of the precursor,the tensile strength and elongation at break can reach 525.5 k Pa and 601%,*** light curing system provides a feasible method to solve the contradiction between the viscosity of the precursor and the mechanical properties of the light curing elastomer in the digital light processing(DLP)3D printing field.

关键词： Silicone elastomer Thiol-ene click chemistry Light curing 3D-printing Chain extender

Compensation Model for Shape Measuring of Cold Strip Rolling

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Journal of Iron and Steel Research International 2010年第6期17卷 21-26页

作者： YU Bing-qiang SUN ya-bo liu Hong-min YOU Lei PENG yan Engineering Research Center of Rolling Equipment and Complete Technology of Ministry of Education Yanshan University Qinhuangdao 066004 Hebei China

Some unavoidable factors in the process of cold strip shape measurement interfere with the shape meter, so the shape measuring results cannot reflect the true shape of the strip and the measuring precision is low. The influ- ences of the measuring error of the strip edges, the transverse temperature difference of the strip, the deflection of shape detection roller, and the shape of the strip coil on the shape measuring results were analyzed in detail, and the corresponding compensation models were established. The simulation calculation and analysis were carried out on a cold strip mill, and a number of disciplinarian cognitions were obtained.

关键词： cold strip rolling shape measuring compensation model