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Growth and Physiological Characteristics of Plantlets of Spathiphyllum‘Sensation’in Rooting Phase as Affected by Sucrose-free Medium and Diffusive Ventilation

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Growth and Physiological Characteristics of Plantlets of Spa...

热处理条件对氧化石墨结构和导电性能的影响(英文)

作者： Feixiong Liao Biqing Wang Fangni xu (Floricultural Research institute,Guangdong academy of Agricultural Science,guangzhou,510640 china) Zhiyuan Yang Guoping Wang (College of Horticulture,South china Agricultural University,guangzhou,510640 china)

Regenerated shoots of Spathiphyllum‘sensation’were transferred in rooting medium with sucrose or sucrose-free inthe vessels capped with Polypropylene film as the closed or with polypropylene film embedding a round gas-permeable membraneas diffusive *** shoots could survive and grow normally on the sucrose-free medium,the fresh weight increment,dryweight percentage and the number of new leaves of plantlets as growth indexes were improved with the diffusive *** the plantlets had a sensitive response to the diffusive ventilation,and the plants produced more roots with initiating to root 3-5days *** concentration was at a low level of about 80 mol·mul during the photo period and CO supplement was limitedin the vessels with the *** content and photosynthesis rate of leaves with the ventilation were higher than with *** plantlets cultured under the diffusive ventilation grew better with a lower rate of death and aberrance as transplanted in-to the peat substrates in the greenhouse.

关键词： Micropropagation Photoautotrophic growth Environmental control Foliage plant CO2 Chlorophyll content

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新型炭材料 2004年第2期19卷 92-96页

作者：肖敏杜续生孟跃中龚克成中山大学理工学院广东广州510275 中国科学院广州化学研究所广东广州510650 华南理工大学材料学院广东广州510641

　氧化石墨是石墨的氧化产物,由于它的碳层表面引入了很多极性功能团,使得很多分子都能够嵌入其层间形成纳米复合物,但也正是这些功能团使得它散失了石墨良好的导电性。为了考察氧化石墨受热处理后还原的可能性,通过X 射线衍射、扫描电... 详细信息

　氧化石墨是石墨的氧化产物,由于它的碳层表面引入了很多极性功能团,使得很多分子都能够嵌入其层间形成纳米复合物,但也正是这些功能团使得它散失了石墨良好的导电性。为了考察氧化石墨受热处理后还原的可能性,通过X 射线衍射、扫描电镜、红外光谱分析以及元素分析等手段研究了氧化石墨在不同热处理条件下的结构变化。研究发现热处理时的升温速度对氧化石墨的结构影响很大,快速升温时,氧化石墨迅速分解,发生膨胀形成类似于膨胀石墨的含有丰富的50nm至5μm左右孔洞的一种结构;而当缓慢升温时,氧化石墨随着热处理温度的升高,逐渐恢复成类似于石墨的结构,同时电导率也随热处理温度的升高而提高,当热处理温度高于180℃时,电导率大于1S/cm。这些结果表明利用氧化石墨作为前驱体,通过先制备聚合物/氧化石墨纳米复合物后经热处理来得到导电性的聚合物/碳纳米复合材料是可行的。

关键词：热处理条件氧化石墨结构导电性能热解

改进NSGA-III求解高维多目标绿色柔性作业车间调度问题

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系统仿真学报 2024年第10期36卷 2314-2329页

作者：徐宜刚陈勇王宸彭运贤湖北汽车工业学院机械工程学院湖北十堰442000 中国工程科技十堰产业技术研究院湖北十堰442000 上海大学上海市智能制造与机器人重点实验室上海200072 东风专用汽车有限公司湖北十堰442000

为解决NSGA-III在求解上述模型存在初始解质量差与局部搜索效率低的问题,提出一种改进的NSGA-III(NSGA-III-TV)。基于MSOS编码,分别对OS和MS染色体采取不同混合初始化策略以提高初始解质量;基于关键路径,采用改进N6邻域结构进行邻域搜索... 详细信息

为解决NSGA-III在求解上述模型存在初始解质量差与局部搜索效率低的问题,提出一种改进的NSGA-III(NSGA-III-TV)。基于MSOS编码,分别对OS和MS染色体采取不同混合初始化策略以提高初始解质量;基于关键路径,采用改进N6邻域结构进行邻域搜索,有效缩短完工时间并降低搜索盲目性,同时采用3种有效变异算子扩大算法搜索空间,提高后期收敛能力。结果表明:NSGA-III-TV在求解高维多目标柔性作业车间调度问题上具有较好的性能以及实用性,为企业生产制造车间的智能绿色转型升级提供了有力支持。

关键词：绿色柔性作业车间调度高维多目标优化关键路径变邻域搜索

OSCILLATION CRITERIA FOR CERTAIN EVEN ORDER NEUTRAL DIFFERENTIAL EQUATIONS

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Annals of Differential Equations 2010年第3期26卷 259-266页

作者： Xianyong Huang (Dept. of Math., Guangdong institute of Education, guangzhou 510303)Zhiting xu (School of Mathematical sciences, South china Normal University, guangzhou 510631)

Using the generalized Riccati technique and the averaging technique, we establish several oscillation criteria for certain even order neutral differential equation. The results obtained in this paper extend and improv... 详细信息

关键词： even order neutral differential equation oscillation generalized partial Riccati transformation integral averaging technique

Possible Effect of 30K Proteins in Embryonic Development of Silkworm Bombyx mori

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Acta Biochimica et Biophysica Sinica 2005年第5期37卷 355-361页

作者： Bo-Xiong ZHONG~1 Jian-Ke LI~(1.2) Jian-Rong LIN~3 Jian-She LIANG~4 Song-Kun SU~1 Hai-Sheng xu~1 Hai-Yan YAN~1 Ping-Bo ZHANG~5 Hiroshi FUJII~5 1 Laboratory of Molecular Biology of Silkworm and Honeybee, Department of Bioresource Science, College of Animal Science,Zhejiang University, Hangzhau 310029, china 2 institute of Apicultural Research, chinese academy of Agricultural Science, Beijing 100093, china 3 Department of Sericulture, South china Agricultural University.guangzhou 510642, china 4 Biochemistry Co. Ltd. of Zhejiang University, Hangzhou 310029. china 5 Faculty of Agriculture,Kyushu University, Fukuoka 812-81. Japan Laboratory of Molecular Biology of Silkworm and Honeybee Department of Bioresource Science College of Animal Science Zhejiang UniversityHangzhou 310029 China institute of Agicultural Research Chinese Academy of Agricultural ScienceBeijing 100093 China Department of Sericulture South China Agricultural UniversityGuangzhou 510642 China Biochemistry Co. Ltd. of Zhejiang UniversityHangzhou 310029 China Faculty of Agriculture Kyushu UniversityFukuoka 812-81 Japan

The silkworm Bombyx mori possesses a 30K protein family of 3×10～4 Da,the biologicalfunctions of which have not been fully *** relationship between the 30K protein family and theembryonic development of temperature sensitive sex-linked mutant strain of silkworm was investigated bytwo dimensional polyacrylamide gel electrophoresis(2D-PAGE)and Matrix assisted laser desorption ionization-time of flight mass spectrometry(MALDI-TOF MS).The results show that protein spots 1-5 of the 30Kprotein family,mainly existing in normal strain,are possibly related to embryonic *** earlyconsumption of a 30K protein named 6G1-30K-1 and the accumulation of 30K proteins named 6G1-30K-3and 6G1-30K-4 are likely caused by the destruction of physiological balance in normal embryonic development,which may lead to lower hatchability of the temperature sensitive *** results suggest that reasonablemetabolism of 30K proteins is a prerequisite for the embryo's normal development.

关键词： silkworm Bombyx mori 30K protein embryonic development 2D-PAGE MALDI-TOF MS

Prepartion and identification of activity of anti-HPV-6b/11E1 universal ribozyme——Rz1198 in vitro

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Asian Journal of Andrology 1999年第4期1卷 195-201页

作者： De-Zhong LIU You-Xin JIN Hua HOU Yang-Zhong HUANG Guang-Cai YANG Qian xu State Key Laboratory of Molecular Biology, Shanghai institute of Biochemistry, chinese academy of sciences, Shanghai 200031, china Department of Biochmeistry, First Military Medical University, guangzhou 510515, china State Key Laboratory of Molecular Biology Shanghai Institute of Biochemistry Chinese Academy of Sciences Shanghai 200031 China Department of Biochemistry First Military Medical University Guangzhou 510515 China

Aim: To study the preparation and cleavage activity of Rz1196 directed against HPV-6bE1 and HPV-11E1 (HPV-6b/11E1) transcripts in vitro. Methods: HPV-6b/11E1 gene fragments were cloned into T-vector under the control ofT7 promoter, ～(32)P-labeted HPV-6b/11E1 transcripts as target-RNAs were transcribed in vitro and purified by ***1198 gene designed as a universal ribozyme for both HPV-6b/11E1 transcripts was cloned into vector p1.5 between5'-cis-Rz and 3'-cis-Rz. a2P-labeled Rzl198 transcript was gel-purified, incubated with target-RNAs at different condi-tions and autoradiographed after denaturing gel-electrophoresis. Results: Rz1198 was active at 37℃. The optimaltemperature was 50℃. For HPV-6bE1, k_m = 12.2 nmol/L, k_cat = 0.18 min～(-1); For HPV-11E1, k_m= 14.7 nmol/L,k_cat =0.14 min～(-1). All these revealed that the design of Rz1198 was correct. It could be a universal ribozyme for thetwo substrates--HPV-6bE1 and HPV-11E1 transcripts. Conclusion: Rz1198 prepared in vitro possesses the perfectspecific catalytic cleavage activity. It leads to the expectation that, in the future, it will be possible to develop a newnucleic acid drug from Rz1198 which can efficiently inhibit the replication of HPV-6b/11 DNA in vivo. (Asian J An-drol 1999 Dec; 1: 195-201)

关键词： ribozyme HPV-6b/11 genetic transcription cleavage identification of activity

Combinatorial Optimization of Physics Parameterization Schemes for Typhoon Simulation Based on a Simple Genetic Algorithm(SGA)

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Journal of Meteorological Research 2024年第1期38卷 10-26页

作者： Zebin LU Jianjun xu Zhiqiang CHEN Jinyi YANG Jeremy Cheuk-Hin LEUNG Daosheng xu Banglin ZHANG china Meteorological Administration–Guangdong Ocean University Joint Laboratory for Marine Meteorology South China Sea Institute of Marine MeteorologyGuangdong Ocean UniversityZhanjiang 524088 College of Ocean and Meteorology Guangdong Ocean UniversityZhanjiang 524088 guangzhou institute of Tropical and Marine Meteorology/Guangdong Provincial Key Laboratory of Regional Numerical Weather Prediction China Meteorological AdministrationGuangzhou 510640 Shenzhen institute of Guangdong Ocean University Shenzhen 518120 College of Atmospheric Science Lanzhou UniversityLanzhou 730000

Each physical process in a numerical weather prediction(NWP)system may have many different parameterization *** studies have shown that the performance of different physical parameterization schemes varies with the weather situation to be ***,it is necessary to select a suitable combination of physical parameterization schemes according to the variation of weather ***,it is rather difficult to identify an optimal combination among millions of possible parameterization scheme *** study applied a simple genetic algorithm(SGA)to optimizing the combination of parameterization schemes in NWP models for typhoon *** feasibility of SGA was verified with the simulation of Typhoon Mujigae(2015)by using the Weather Research and Forecasting(WRF)model and Typhoon Higos(2020)by using the Coupled Ocean–Atmosphere–Wave–Sediment Transport(COAWST)modeling *** results show that SGA can efficiently obtain the optimal combination of *** Typhoon Mujigae(2015),the optimal combination can be found from the 1,304,576 possible combinations by running only 488 *** results can be obtained for Typhoon Higos(2020).Compared to the default combination proposed by the COAWST model system,the optimal combination scheme significantly improves the simulation of typhoon track and *** study provides a feasible way to search for the optimal combinations of physical parameterization schemes in WRF and COAWST for more accurate typhoon *** can help provide references for future development of NWP models,and for analyzing the coordination and adaptability of different physical process parameterization schemes under specific weather backgrounds.

关键词： simple genetic algorithm(SGA) combinatorial optimization typhoon forecast numerical weather prediction(NWP)

Microdiamonds and their classification in eclogites from Dabie and Su-Lu regions, central eastern china

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Microdiamonds and their classification in eclogites from Dab...

Acetic acid-and furfural-based adaptive evolution of Saccharomyces cerevisiae strains for improving stress tolerance and lignocellulosic ethanol production

2004年全国岩石学与地球动力学研讨会

作者： Shutong xu, Yican LIU, Guanbao CHEN~1, Shouyuan JI, Pei NI, Wansheng XIAO (1. Anhui institute of Geology, 19# Ningguo Road Hefei, 230001 china 2. Laboratory of Continental Dynamics of Ministry of Land and Resources of china, Beijing 100037 3. Department of Earth sciences, Nanjing University, Hankou Road, china, 210008 4. guangzhou institute of geochemistry, chinese academy of sciences, guangzhou, china 510640)

＜正＞ Since the first occurrence of microdiamond from Dabie Mountains reported in 1992, more than ten microdiamond crystals were found in 2003 and 2004 respectively. In the present paper, five in situ microdiamonds in thin-sections of eclogites and two free grains recovered from crushed eclogites are reported. Two larger free microdiamonds are 200-700 μm in size;the in situ microdiamonds are 30-180 μm across. Most the in situ microdiamonds are inclusions in garnets, but some larger ones are intergranular. All the newly found microdiaminds are perfectly confirmed by Raman spectroscopy. The most important is the microdiamonds from northern Dabie Mountains, where has been so far treated as a low-pressure terrane by some international geologists. In contrast, it is now proved to be not only the UHP terrane but also the deepest subducted terrane among the UHP terranes by the extra evidence of cpx exsolution in garnets. Two free and two in situ microdiamonds are identified by Infrared spectroscopy to be the mixture of laA and laB types, which differ from the synthetic diamond by lack of single Nitrogen atoms in the crystal lattice. It means that no synthetic diamonds are involved. It is in concordance with the evidence from the microdiamond with zonal structure and inclusion of minor microdiamonds, which can only be found in the naturally formed microdiamonds.

关键词： Microdiamond Raman & Infrared spectroscopy Dabie Mountains Su-Lu region

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chinese Journal of Chemical Engineering 2024年第8期72卷 26-33页

作者： Omama Rehman Youduo Wu Quan Zhang Jin Guo Cuihuan Sun Huipeng Gao Yaqing xu Rui xu Ayesha Shahid Chuang xue State Key Laboratory of Fine Chemicals Frontiers Science Centre for Smart Materials Oriented Chemical EngineeringEngineering Research Center of Application and Transformation for Synthetic BiologySchool of BioengineeringDalian University of TechnologyDalian 116024China Ningbo institute of Dalian University of Technology Ningbo 315016China SINOPEC Dalian Research institute of Petroleum and Petrochemicals Co. Ltd.Dalian 116041China Microbial Research institute of Liaoning Province Chaoyang 122000China Yunnan Provincial Rural Energy Engineering Key Laboratory Kunming 650600China US-Pak Center for Advanced Studies in Agriculture and Food Security University of AgricultureFaisalabadPakistan

Acetic acid and furfural are known as prevalent inhibitors deriving from pretreatment during lignocellulosic ethanol *** negatively impact cell growth,glucose uptake and ethanol biosynthesis of Saccharomyces cerevisiae *** of industrial *** strains with high tolerance towards these inhibitors is thus critical for efficient lignocellulosic ethanol *** this study,the acetic acid or furfural tolerance of different *** strains could be significantly enhanced after adaptive evolution via serial cultivation for 40 generations under stress *** acetic acid-based adaptive strain SPSC01-TA9 produced 30.5 g·L^(-1)ethanol with a yield of 0.46 g·g^(-1)in the presence of 9 g·L^(-1)acetic acid,while the acetic acid/furfural-based adaptive strain SPSC01-TAF94 produced more ethanol of 36.2 g·L^(-1)with increased yield up to 0.49 g·g^(-1)in the presence of both 9 g·L^(-1)acetic acid and 4 g·L^(-1)*** improvements were also observed during non-detoxified corn stover hydrolysate culture by SPSC01-TAF94,which achieved ethanol production and yield of 29.1 g·L^(-1)and 0.49 g·g^(-1),respectively,the growth and fermentation efficiency of acetic acid/furfural-based adaptive strain in hydrolysate was 95%higher than those of wildtype strains,indicating the acetic acid-and furfural-based adaptive evolution strategy could be an effective approach for improving lignocellulosic ethanol *** adapted strains developed in this study with enhanced tolerance against acetic acid and furfural could be potentially contribute to economically feasible and sustainable lignocellulosic biorefinery.

关键词： Saccharomyces cerevisiae Lignocellulosic ethanol production Adaptive evolution Acetic acid Furfural