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Modern pollen assemblages from surface lake sediments in northwestern China and their importance as indicators of vegetation and climate

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Science China Earth Sciences 2015年第9期58卷 1643-1655页

作者： QIN Feng ZHAO yan LI Quan cai MaoTang Key Laboratory of Land Surface Pattern and Simulation Institute of Geographic Sciences and Nature Resources ResearchChinese Academy of Sciences

The modern pollen assemblages of surface lake sediments and topsoils in northwestern China were studied to understand the relationship of modem pollen data with contemporary vegetation and climate, and the differences between the pollen assem- blages of surface lake sediments and topsoils. The results show that Chenopodiaceae and Artemisia are dominant elements in the pollen assemblages of northwestern China. Additionally, Ephedra, Cyperaceae, Asteraceae, Poaceae, Picea, Pinus, and Betula are also important pollen taxa. Both pollen assemblages and principal component analysis indicate that pollen data from surface lake sediments and topsoils can be used to differentiate the main vegetation types of this region （desert, steppe, mead- ow and forest）. However, differences exist between modern pollen assemblages of the two types of sediments due to the dif- ferent relevant source areas of pollen and degrees of pollen preservation. For example, the larger relevant source area of sur- face lake sediment results in a higher abundance of Betula in pollen assemblage from surface lake sediment, whereas the ten- dency to disintegrate thin-walled pollen types in topsoil leads to a higher proportion of resistant pollen, such as Asteraceae. Linear regression analysis indicates that the Artemisia/Chenopodiaceae （A/C） ratio in pollen assemblages of surface lake sedi- ments can be used to indicate humidity changes in the study area. However, the A/C ratio in topsoils should be used carefully. Our results suggest that pollen data from surface lake sediments would be better references for interpreting the fossil pollen assemblages of lake cores or lacustrine profiles.

关键词： modern pollen assemblage surface lake sediment topsoil vegetation climate northwestern China

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Bladder metastasis from epidermal growth factor receptor mutant lung cancer:A case report

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World Journal of Clinical Cases 2023年第14期11卷 3356-3361页

作者： cai-Bao Jin ling yang Department of Thoracic Oncology Hubei Cancer HospitalWuhan 430000Hubei ProvinceChina

BACKGROUND Bladder metastasis from lung cancer with epidermal growth factor receptor(EGFR)mutation is extremely ***,we report a case of bladder metastasis from lung adenocarcinoma with EGFR *** SUMMARY A 53-year-old female patient was diagnosed with advanced lung adenocarcinoma with EGFR exon 19 *** nodules on the bladder wall were found by regular examination of the pelvic cavity through computed tomography during targeted *** cystoscopy and histological examination of bladder biopsy tissues confirmed the bladder metastasis from lung *** addition,genetic analysis of the bladder metastasis revealed EGFR T790M *** patient achieved a good response to a third-generation EGFR tyrosine kinase *** During routine follow-up of lung cancer patients,imaging examination of the pelvic cavity should be performed to avoid missing bladder *** ultimate diagnosis of bladder metastasis sill depends on the pathological result of biopsy tissues.

关键词： Bladder metastasis Lung cancer EGFR mutation Tyrosine kinase inhibitor Histological examination Case report

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Biodegradation of phenol and m-cresol by mutated Candida tropicalis

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Journal of Environmental Sciences 2010年第4期22卷 621-626页

作者： yan Jiang Xun cai Di Wu Nanqi Ren State Key Laboratory of Urban Water Resource and Environment Harbin Institute of Technology Harbin 150090 China. Department of Chemical Engineering Daqing Oilfield Engineering Limited Company Daqing 163712 China School of Life Sciences and Chemistry Harbin University Harbin 150016 China

The phenol and m-cresol biodegradations were studied using the mutant strain CTM 2 obtained by the He-Ne laser irradiation on wild-type Candida tropicalis. The results showed that C. tropicalis exhibited the increased capacity of phenolic compounds degradation after laser irradiation. It could degrade 2600 mg/L phenol and 300 mg/L m-cresol by 5% inoculum concentration, respectively. In the dual-substrate biodegradation system, 0-500 mg/L phenol could accelerate m-cresol biodegradation, and 300 mg/L m-cresol could be completely utilized within 46 hr at the presence of 350 mg/L phenol. Besides, the maximum biodegradation of m-cresol could reach 350 mg/L with 80 mg/L phenol within 61 hr. Obviously, phenol, as a growth substrate, could promote CTM 2 to degrade m-cresol, and was always preferentially utilized as carbon source. Comparatively, low-concentration m-cresol could result in a great inhibition on phenol degradation. In addition, the kinetic behaviors of cell growth and substrate biodegradation were described by kinetic model proposed in our laboratory.

关键词： biodegradation the mutant strain CTM 2 phenol m-cresol kinetic

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Phenols/Al(C_(6)F_(5))_(3) Initiation Systems for Cationic Polymerizations of Isobutylene

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Chinese Journal of Polymer Science 2023年第5期41卷 713-719,I0008页

作者： ling cai Qi-Yuan Wang Xin-Li Liu Dong-Mei Cui State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China Department of Polymer Science and Engineering University of Science and Technology of ChinaHefei 230026China

We report herein the cationic polymerization of isobutylene(IB)under mild conditions is realized with a new binary initiation system generated by simply mixing a Lewis super acid Al(C_(6)F_(5))_(3) and a substituted phenol(RPhOH).Polymers with medium and/or high molecular weights(M_(W)=4.9×10^(4)-27.7×10^(4) g·mol^(-1))can be obtained in toluene and temperatures from-20℃to 0℃.NMR spectrum analysis and DFT sim ulation reveals the in situ generated acidic coordinating complex Ak(C_(6)F_(5))_(3)·RPhOH is the initiating active species,which fu rther tran sformed into the ion-pair[Al(C_(6)F_(5))_(3)ORPh]^(-)[PIB]^(+)of the active intermediates upon growing IB monomers where the counter anion[Al(C_(6)F_(5))_(3)R^(O)Ph]-coordinates to the macrocation via the phenoxy *** catalyst performances are the concert effects of the steric bulkiness and electronics of the counter anion on the coordinating strength to the macrocation,which is significant to the stability of the active species.

关键词： Cationic polymerization Phenols Lewis super acid Polyisobutylene

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Polyphyllin D induces G2/M Cell Cycle Arrest via Dysfunction of Cholesterol Biosynthesis in Liver Cancer Cells

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Biomedical and Environmental Sciences 2023年第1期36卷 94-98页

作者： CHEN yan yan REN cai Fang WEN Shi Yuan School of Medicine Jiangsu UniversityZhenjiang 212003JiangsuChina College of Basic Medical Sciences ShanxiMedical UniversityTaiyuan 030000ShanxiChina

Liver cancer is a frequently occurring malignancy with a poor prognosis and a high mortality rate and is the second leading cause of cancer-related deaths[1]. Many chemotherapeutic drugs are extensively used to treat liver cancer, such as doxorubicin and cisplatin. However, these drugs have shown poor treatment effects in clinical trials because of acquired resistance and the high heterogeneity of liver cancer[2]. Therefore.

关键词： drugs Liver cancer

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Networked collaborative pseudo-dynamic testing of a multi-span bridge based on NetSLab

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Earthquake Engineering and Engineering Vibration 2009年第3期8卷 387-397页

作者： cai Xinjiang Tian Shizhu Wang Dapeng Xiao yan School of Civil Engineering Harbin Institute of Technology Harbin 150090 China School of Civil Engineering Hunan University Changsha 410082 China Department of Civil Engineering University of Southern California Los Angeles California CA90089-2531 USA

Modem dynamic tests such as networked collaborative pseudo-dynamic testing （PDT） provide new tools to study the dynamic performance of large and complex structures. In this paper, several networked collaborative PDT systems established in China and abroad are introduced, including a detailed description of the first networked collaborative platform that involved the construction of a standardized demonstration procedure for networked collaborative PDT. The example is a multi-span bridge with RC piers retrofitted by FRP, and a networked structural laboratory （NetSLab） platform is used to link distributed laboratories located at several universities together. Substructure technology is also used in the testing. The characteristics, resource sharing and collaborative work of NetSLab are described, and the results illustrate that use of the NetSLab is feasible for studying the dynamic performance of multi-span bridge structures.

关键词： dynamic tests networked pseudo-dynamic testing multi-span bridges RC short piers FRP NetSLab

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Energy conversion characteristics of reciprocating piston quasi- isothermal compression systems using water sprays

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Science China(Technological Sciences) 2018年第2期61卷 285-298页

作者： jia guanwei cai maolin xu weiqing shi yan school of automation science and electrical engineering beihang universityBeijing 100191China pneumatic and thermodynamic energy storage and supply beijing key laboratory beihang universityBeijing 100191China

Air compressors are vital and have numerous industrial applications. Approximately 8% of the annual operating electricity consumption in industrial countries is constituted by due to the use of air compressors. Because the poor heat transfer to the environment in the rapid compression process, the compression is non-isothermal, the efficiency of compressors is restricted. To improve their efficiency and achieve isothermal compression, this study proposes energy conversion reciprocating piston quasiisothermal compression using a water spray. First, a mathematical model of a reciprocating piston compressor with water sprays was established. Through experimental investigation and simulations, the mathematical model was validated. The energy conversion characteristics of the reciprocating piston compressor were then studied. To reduce compression power and enhance compression efficiency, it was first discovered that the critical parameters were the input pressure of the driving chamber, water spray mass, and compression volume ratio, which were then evaluated thoroughly. The higher the inlet pressure of the driving chamber, the faster the air compression velocity. Additionally, the compression efficiency was elevated as the water spray mass was gradually increased for a given compression volume ratio. When the compression volume ratio was increased from 2 to 3,the compression power increased from 172.7 J/stroke to 294.2 J/stroke and the compression efficiency was enhanced from 37.3%(adiabatic) to 80.6%. This research and its performance analysis can be referred to during the parameter design optimisation of reciprocating piston quasi-isothermal compression systems using water sprays.

关键词： water spray cooling quasi-isothermal compression compression power compression efficiency

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A safe and effective surgical navigation technique in laparoscopic radical gastrectomy: Indocyanine green-mediated near-infrared fluorescent imaging

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Cancer Communications 2020年第6期40卷 270-272页

作者： yan Qian Shirong cai Divison of Gastrointestinal Surgery Center the First Affiliated Hospital of Sun Yat-sen UniversityGuangzhouGuangdong 510080P.R.China Gastric Cancer Center Sun Yat-sen UniversityGuangzhouGuangdong 510080P.R.China

In the past decades,gastric cancer(GC)is one of the most common cancers and causes of cancer-related deaths worldwide[1].China has the highest incidence of GC[2]and accounts for more than 40%of all new GC cases in the world[3].Radical lymphadenectomy serves as an important role in the staging and definitive management of GC[4,5].At present,laparoscopic radical gastrectomy has been shown to significantly improve the accuracy of tumor staging and long-term survival of GC patients[6].The retrieval of more lymph nodes(LNs)via lymphadenectomy is a current requirement for laparoscopic radical gastrectomy[5].Lymphadenectomy is usually performed according to the experience of ***,it is a substantial challenge for surgeons to efficiently and accurately acquire enough LNs without increasing the risk of complications as the vascular and lymphatic anatomy of stomach is extremely ***,surgeons are looking for more accurate strategies to perform adequate lymphadenectomy under laparoscopic guidance.

关键词： anatomy stomach radical

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Magnetic skyrmions in curved geometries

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Rare Metals 2022年第7期41卷 2184-2199页

作者： yan Liu Na cai Ming-Zhu Xin Shuang Wang College of Sciences Northeastern UniversityShenyang 110819China

In curved geometries,a lot of novel curvaturedriven effects are discovered due to the curvature-induced effective anisotropy and Dzyaloshinskii-Moriya *** effect also provides means to modify conventional results and launch new functionalities in study of magnetic *** skyrmions are particle-like spin textures with topological *** has been found in several magnetic materials and has been one of the research hotspots in magnetism and spintronics as the carriers of ***-Moriya interaction and anisotropy have significant effects on the formation and stability of magnetic *** magnetic skyrmions in curved geometries show some novel characteristics,and the study in this field may promote the development of magnetic *** article provides a review of the present state of the research on skyrmions in curved geometries including curved nanotracks,thin films with curved defect,nanotubes,spherical and hemispherical *** reviewmainly covers three aspects,the formation and stability of skyrmions,the shape and size of skyrmions,and the dynamical behaviors of skyrmions in curved geometries.

关键词： Magnetic skyrmions Curved geometries Nanotubes Nanospheres

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Molecular Simulation study of Alkyl Monolayers on Si(III) Surface

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Chinese Chemical Letters 2003年第2期14卷 213-216页

作者： Shi ling YUAN Zheng Ting cai Li XIAO 中国人民解放军85医院，上海200052

The structure of eight-carbon monolayers on the H-terminated Si(III) surface was investigated by molecular simulation method. The best substitution percent 50% for octene or octyne-derived monolayer can be obtained using molecular mechanics calculation. And the densely packed, well-ordered monolayer on Si(III) surface can be shown through energy minimization in the suitable-size simulation cell.

关键词： Alkyl monolayer Si(III) surface molecular simulation.

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