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基因工程大肠杆菌合成γ-聚谷氨酸

过程工程学报 2009年第4期9卷 791-795页

作者：马婕王丹李强邢建民刘会洲中国科学院过程工程研究所生化工程国家重点实验室北京100190 中国科学院研究生院北京100049

利用PCR方法,从自身不合成γ-聚谷氨酸(γ-PGA)的Bacillussubtilis168菌的基因组DNA中扩增出γ-PGA合成基因ywsC,ywtA和ywtB,测序并对该基因编码区进行序列分析,比对结果表明,扩增的ywsC,ywtA和ywtB与文献报道的相似度为100%.将3个基因... 详细信息

利用PCR方法,从自身不合成γ-聚谷氨酸(γ-PGA)的Bacillussubtilis168菌的基因组DNA中扩增出γ-PGA合成基因ywsC,ywtA和ywtB,测序并对该基因编码区进行序列分析,比对结果表明,扩增的ywsC,ywtA和ywtB与文献报道的相似度为100%.将3个基因连接到pTrcHisA载体后转化至***10及***21(DE3)宿主菌表达,结果宿主菌细胞均具备了γ-PGA生物合成能力,产量最高达到0.134g/L.

关键词： γ-聚谷氨酸枯草芽孢杆菌B.subtilis168 大肠杆菌TOP10 大肠杆菌BL21(DE3)

Physical Layer Security Scheme With AoI-Awareness for Industrial IoT Based on Covert Communications

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IEEE/CAA Journal of Automatica Sinica 2025年第1期 276-278页

作者： Yaping Li Zhi-Xin liu Jia-Wei Su Ya-zhou Yuan the Key Laboratory of Industrial Computer Control Engineering of Hebei Province Yanshan University

Dear Editor,Industrial Internet of things(IIoT) is a typical application of cyberphysical system(CPS). In the IIoT, wireless communication is an inevitable trend to replace the deployment-limited wired transmission for cases with large-scale and mobile devices. However, wireless communication gives rise to critical issues related to physical security, such as malicious detections and attacks [1].

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Persistent alterations in gray matter in COVID-19 patients experiencing sleep disturbances:a 3-month longitudinal study

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Neural Regeneration Research 2025年第10期20卷 3013-3024页

作者： Kaixuan zhou Gaoxiong Duan Ying liu Bei Peng Xiaoyan zhou Lixia Qin Lingyan Liang Yichen Wei Qingping Zhang Xiaocheng Li Haixia Qin Yinqi Lai Yian Lu Yan Zhang Jiazhu Huang Jinli Huang Yinfei Ouyang Bolin Bin Mingming Zhao Jun liu Jianrong Yang Demao Deng Guangxi Key Laboratory of Special Biomedicine School of MedicineGuangxi UniversityNanningGuangxi Zhuang Autonomous RegionChina Department of Radiology the People’s Hospital of Guangxi Zhuang Autonomous RegionGuangxi Academy of Medical SciencesNanningGuangxi Zhuang Autonomous RegionChina Department of Sleep Medicine the People’s Hospital of Guangxi Zhuang Autonomous RegionNanningGuangxi Zhuang Autonomous RegionChina Department of Radiology The Second Xiangya HospitalCentral South UniversityChangshaHunan ProvinceChina Guangxi Clinical Research Center for Sleep Medicine the People’s Hospital of Guangxi Zhuang Autonomous RegionNanningGuangxi Zhuang Autonomous RegionChina

Sleep disturbances are among the most prevalent neuropsychiatric symptoms in individuals who have recovered from severe acute respiratory syndrome coronavirus 2 *** studies have demonstrated abnormal brain structures in patients with sleep disturbances who have recovered from coronavirus disease 2019(COVID-19).However,neuroimaging studies on sleep disturbances caused by COVID-19 are scarce,and existing studies have primarily focused on the long-term effects of the virus,with minimal acute phase *** a result,little is known about the pathophysiology of sleep disturbances in the acute phase of *** address this issue,we designed a longitudinal study to investigate whether alterations in brain structure occur during the acute phase of infection,and verified the results using 3-month follow-up data.A total of 26 COVID-19 patients with sleep disturbances(aged 51.5±13.57 years,8 women and 18 men),27 COVID-19 patients without sleep disturbances(aged 47.33±15.98 years,9 women and 18 men),and 31 age-and gender-matched healthy controls(aged 49.19±17.51 years,9 women and 22 men)were included in this *** COVID-19 patients with sleep disturbances were included in a longitudinal *** found that COVID-19 patients with sleep disturbances exhibited brain structural changes in almost all brain *** cortical thicknesses of the left pars opercularis and left precuneus were significantly negatively correlated with Pittsburgh Sleep Quality Index ***,we observed changes in the volume of the hippocampus and its subfield regions in COVID-19 patients compared with the healthy *** 3-month follow-up data revealed indices of altered cerebral structure(cortical thickness,cortical grey matter volume,and cortical surface area)in the frontal-parietal cortex compared with the baseline in COVID-19 patients with sleep *** findings indicate that the sleep disturbances patients had altered morphology in the cortical an

关键词： brain structure cortical gray matter volume cortical surface area cortical thickness hippocampus magnetic resonance imaging Pittsburgh Sleep Quality Index severe acute respiratory syndrome coronavirus 2 infections sleep disturbances sub-cortical volume

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磷酸酯基超交联聚合物的制备及其光谱表征

光谱学与光谱分析 2023年第S1期43卷 21-22页

作者：蔡慧戎猛王丽邢慧芳吴霞杨良嵘刘会洲中国科学院过程工程研究所北京100190 中国科学院大学北京100049

我国稀土开采工业中存在大量浸矿尾液,从尾液中高效分离稀土具有重要意义。超交联聚合物是一类具有高比表面积、孔道结构性质可调且优异稳定性的多孔材料。通过外交联剂编织法合成了两种富含磷酸酯基团的超交联聚合物(P-DPP,P-DPPE),通... 详细信息

我国稀土开采工业中存在大量浸矿尾液,从尾液中高效分离稀土具有重要意义。超交联聚合物是一类具有高比表面积、孔道结构性质可调且优异稳定性的多孔材料。通过外交联剂编织法合成了两种富含磷酸酯基团的超交联聚合物(P-DPP,P-DPPE),通过磷酸酯基团与稀土的路易斯酸碱相互作用提高对稀土的选择性,并通过FTIR,ICP-OES和BET进行了表征。表征结果为研究该类聚合物用于尾矿稀土的分离提取奠定了基础。

关键词：超交联磷酸酯基红外光谱稀土分离

pH响应的包覆超顺磁性纳米颗粒的γ-聚谷氨酸二级结构研究

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光谱学与光谱分析 2009年第8期29卷 2148-2151页

作者：张菊花邢建民江洋洋高红帅刘会洲中国科学院过程工程研究所中国科学院绿色过程与工程重点实验室北京100190 中国科学院研究生院北京100049

用傅里叶红外光谱法(FTIR)定量研究了pH对包覆超顺磁性纳米颗粒的γ-聚谷氨酸(γ-PGA)二级结构变化的影响。结合傅里叶去卷积技术和二阶导数法对原始谱带(酰胺Ⅰ带)进行高斯拟合,计算了二级结构的相对百分含量。红外结果显示:pH变化影响... 详细信息

用傅里叶红外光谱法(FTIR)定量研究了pH对包覆超顺磁性纳米颗粒的γ-聚谷氨酸(γ-PGA)二级结构变化的影响。结合傅里叶去卷积技术和二阶导数法对原始谱带(酰胺Ⅰ带)进行高斯拟合,计算了二级结构的相对百分含量。红外结果显示:pH变化影响γ-PGA的二级结构。γ-聚谷氨酸磁性纳米微球中γ-PGA的β-折叠和β-转角的总含量很大,达65%以上,而α-螺旋和无规卷曲的含量则比较少。随着pH值的增大,β-折叠的含量逐渐减少相反β-转角的含量逐渐增大。γ-PGA二级结构变化与γ-聚谷氨酸磁性纳米微球在水溶液的稳定性有关。考察了γ-聚谷氨酸纳米微球的zeta电位随pH的变化。结果表明,pH为10.2时zeta电位出现极小值,其绝对值最大,颗粒稳定性最好。

关键词：傅里叶红外光谱法 γ-聚谷氨酸磁性纳米微球 pH zeta电位

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超交联聚合物封装硫及其红外拉曼光谱研究

光谱学与光谱分析 2020年第S1期40卷 17-18页

作者：徐自豪杨良嵘刘会洲中国科学院过程工程研究所中国科学院绿色过程与工程重点实验室北京100190 中国科学院大学化学工程学院北京100049

我国盐湖中储备有大量的铯,从盐湖卤水中高效分离铯具有重要意义。超交联聚合物是基于傅克烷基化反应制备的一类聚合物。制备了一种超交联聚合物并将硫封装在其孔道内,通过硫与铯的路易斯酸碱相互作用提高对铯的选择性。通过红外和拉曼... 详细信息

我国盐湖中储备有大量的铯,从盐湖卤水中高效分离铯具有重要意义。超交联聚合物是基于傅克烷基化反应制备的一类聚合物。制备了一种超交联聚合物并将硫封装在其孔道内,通过硫与铯的路易斯酸碱相互作用提高对铯的选择性。通过红外和拉曼光谱进行了表征。表征结果为研究该类固相萃取剂用于盐湖铯的分离提取奠定了基础。

关键词：超交联聚合物红外光谱拉曼光谱盐湖分离

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化工过程纳微结构界面预测与调控展望

过程工程学报 2008年第4期8卷 660-666页

作者：刘会洲郭晨常志东杨超李洪钟陈家镛中国科学院过程工程研究所绿色过程与工程重点实验室中国科学院过程工程研究所多相复杂系统国家重点实验室北京100190

对国内外化学化工过程中纳微结构界面的研究进行了综述.通过对一些典型实例的分析和讨论,指出纳微结构界面不仅是目前化学化工研究的热点,也是对化工过程传递规律新认识的基础.提出从分子结构出发,建立多种数学模型,从而有可能实现对化... 详细信息

对国内外化学化工过程中纳微结构界面的研究进行了综述.通过对一些典型实例的分析和讨论,指出纳微结构界面不仅是目前化学化工研究的热点,也是对化工过程传递规律新认识的基础.提出从分子结构出发,建立多种数学模型,从而有可能实现对化工过程中纳微结构界面的预测与调控.随着结构、界面与'三传一反'关系的理论与计算模型的确立,有可能建立过程工业装置设计、放大和调控的科学理论,化学工程科学将会进入一个新的里程.

关键词：化工过程纳微结构界面预测调控

GAS CHROMATOGRAPHIC-MASS SPECTROMETRIC ANALYSIS OF ANABOLIC STEROIDS IN HUMAN URINE

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Chinese Chemical Letters 1990年第2期1卷 143-146页

作者： Ji ZHANG Chun Sheng liu Tong hui zhou (Institute of Materia Medica,1 Xian Nong Tan Street,Beijing 100050,P.R.China)Yi Zhong ZHANG Chang Jiu ZHANG Li YE (+ National Research Institute of Sports Medicine,11 Tiyuguan Road,Beijing 100061)

A new GC/MS method for detection and identification of 19 anabolic steroids in human urine is *** procedure involves adsorption and isolation on a macroporous XAD-2 resin,enzymatic hydrolysis,alkaline extraction,derivatization,GC separation and MS detec- *** chromatographic-mass spectrometric data illustrate artifacts arising from enzymatic hydrolysis of steroid glucuronides and the structural characterization of their metabolites. Using this method,metabolic studies of these steroids in human urine were made after their ingestion by normal and healthy male *** method was proven to be suitable for large-scale routine analysis of anabolic steroids and was used successfully in passing the doping control test held by the Medical Commission of the International Olympic Committee.

关键词： GAS CHROMATOGRAPHIC-MASS SPECTROMETRIC ANALYSIS OF ANABOLIC STEROIDS IN HUMAN URINE der GC

Efficient large-area flexible organic photovoltaic modules on transparent thin silver electrodes

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Science China Chemistry 2025年

作者： Cong Xie Zedong Xiong Xinlu liu Wen Wang Yang liu Xueshi Jiang Xin Lu Lulu Sun Yinhua zhou Wuhan National Laboratory for Optoelectronics Huazhong University of Science and Technology Kunming Institute of Physics

Large-area flexible organic photovoltaic（OPV） modules are challenging to achieve high power conversion efficiency（PCE）.Electrical shunts or shortages generally occur in large-area OPV modules due to the ultrathin（100–200 nm） and soft active layers. Improving the surface smoothness of bottom transparent electrode will be able to suppress the shunts and shortages. In this work, we report a method to fabricate smooth and flexible transparent electrodes based on thin silver film, and further to fabricate efficient large-area flexible OPV modules. The fabricated thin silver transparent electrodes simultaneously have high conductivity, high optical transmittance, good mechanical flexibility and low surface roughness. Humidity exposure（h.e.）treatment on MoO3effectively facilitates the continuous growth of the thin transparent silver electrode. 6 nm silver film on MoO3（h.e.） on plastic substrate shows a transmittance up to 89%, a sheet resistance of 15 Ω/sq, and a low surface roughness with a rootmean-square value of 0.276 nm. Furthermore, 52-cm2flexible organic solar modules（15 subcells） showed a certified PCE of12.66%. Furthermore, a 1350 cm2flexible component assembled by 25 pieces of 52–55 cm2modules showed certified PCE of12.10% with an open-circuit voltage of 62.85 V.

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