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Isolation of cellulase producing microbes from the intestine of Ctenopharyngodon idellus （ Grass Carp） and their cellulase enzymatic activity analysis

Isolation of cellulase producing microbes from the intestine...

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2.05水产科技论坛

作者： WANG Chao-yuan, HAO Bo , HE Li ( College of Life sciences, South Central university for Nationalities, Wuhan, 430074,{2. Key laboratory of Freshwater Fish Germplasm Resource and Biotechnology, CAFS, Jingzhou, Hubei 434000,{2. . school of Life science and technology, Huazhong Agriculture university, Wuhan, Hubei 430074,{2.)

＜正＞Cellulose is the most abundant and broad organic material on the earth. Because of the lacking of {2., not only the kind of precious resource is not made full use but also most of them are .abandoned and then became one of the pollution of the environment. In order to make full use of cellulose, experiments were carried out to sieve the strain of cellulolytic microbes. 50 bacterial strains were isolated from the enteron of Ctenopharyngodon idellus by an elective medium including sodium carboxymethyl cellulose and 33 strains with some distinct zone of clearing in cellulose medium from the group of strains were obtained. On this basis, with filter paper and absorbent cotton as substrate and the concentration of glucose measured by the colorimetry of DNS, we measured FPase, CMCase and absorbent cotton enzyme activity of liquid culture filtrates. After calculation, we selected 6 strains with high cellu-lase activity. Among them, X2. X4 and X5 showed high FPase producing ability and X3, X5 and X6 showed strong CMCase producing ability. All the 6 strains of microbes were obtained from the middle part and the rear part of the intestine of grass carp. These strains should be stable habitants in the grass carp intestine. Different strains showed different ability to produce cellulase, which may suggest that they collaborate with each other in the grass carp intestine to digest cellulase. Aerobic microbes are the main source of cellulase producing microbes.

关键词： cellulase producing microbes grass carp isolation cellulase activity

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Preparation and Characterization of Urea-gypsum by Solid-phase Ball Milling

Preparation and Characterization of Urea-gypsum by Solid-pha...

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2.11 IEEE International Conference on Waste Recycling,Ecology and Environment(ICWREE 2.11)

作者： Yuequan DENG1 Chunfeng XU2. Faqing DONG1 Peng FU1 Jianghong HE1 1 school of material and Engineering Southwest {2. of science and technology Mianyang china 2.Water Quality Inspection Center Mianyang Water (Group) Co mpany Limited M ianyang Ch ina No. 2.6 Changhong Road Mianyang City Sichuan Pro. 62.002

Urea-gypsum was prepared by solid-phase ball milling from g ypsum and urea as the material. The technological conditions were optimized by the orthogonal design;the dynamic characteristics of solid phase reaction were studied by Kissinger equation, and the urea-gypsum was characterized by XRD, FTIR, S EM and TG-DSC. The results showed that the optimum technical conditions are as follows: reaction temperature 55 ℃ , reaction time 40 min, ball-feed ratio 6:1, rotational speed 600 r min-1, and in this condition the average conversion of reaction can reach 89.38%;the relationship between the reaction rate constant KK and temperature T can be described by the formula as KK=1.5×109exp[（71.70×103）/RT];urea-gypsum prepared by solid-phase ball milling of platelike structure belongs to triclinic, and the characteristic abs orptions of IR are the stretching vibrations of N-H, C=O, C-N, S-O and deformation vibration of N-H, and the decomposition temperature of urea-gypsum is 2.0-2.0 ℃ .This paper provides a preparation for urea-gypsum with high efficiency and energy saving effective, which could improve the nitrogen use efficiency effective, reduce the agricultural nitrogen emission, and increase the crops yield, and this also open up a new technology for large-scale utilization of industrial waste such as phosphog ypsum and desulphogypsum.

关键词： urea-gypsum solid-phase ball milling preparation characterization

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双重电流片和日冕瞬变

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Chinese Journal of Astronomy and Astrophysics 1986年第4期 312-316页

作者：胡友秋王延群中国科学技术大学地球和空间科学系

当背景磁场在日冕中存在零磁场线时,反向新磁通量的喷发将会产生双重电流片,包括零场区附近的磁场受到挤压而形成的横向电流片和新喷发场、原背景场之间形成的拱形电流片、本文用一对线偶极子来模拟背景场,用一对线磁荷来模拟反向喷发场... 详细信息

当背景磁场在日冕中存在零磁场线时,反向新磁通量的喷发将会产生双重电流片,包括零场区附近的磁场受到挤压而形成的横向电流片和新喷发场、原背景场之间形成的拱形电流片、本文用一对线偶极子来模拟背景场,用一对线磁荷来模拟反向喷发场,讨论了上述双重电流片的形成和演变过程。在电流片形成过程中,物质将向电流片集中。拱形电流片物质主要来自过渡层和光球层,并通过辐射损失进一步冷却,形成低温日珥环;横向电流片的物质则全部来自日冕,从而形成高温日冕环。以上结果可用来解释1984年4月14日观测到的日冕瞬变。

关键词：日地空间太阳磁场电流片

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Precise isotopic measurements of sub-nanogram Nd of standard reference material by thermal ionization mass spectrometry using the NdO+ technique

Precise isotopic measurements of sub-nanogram Nd of standard...

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中国科学院地质与地球物理研究所2.07学术年会

作者： Chao-Feng Li~(a,b,c),Fukun Chen~(a,c,*),Xiang-Hui Li~(a,b) a State Key laboratory of Lithospheric Evolution,Institute of Geology and Geophysics,Chinese Academy of sciences,Beijing 10002.,{2. b school of earth sciences,Graduate university of Chinese Academy of sciences,Beijing 100039,{2. c laboratory for Radiogenic Isotope Geochemistry,Institute of Geology and Geophysics,Chinese Academy of sciences,Beijing 10002.,{2.

The Sm-Nd isotopic system,one of the important techniques for dating and geochemical tracing,has been widely used in *** and accurate measurements of Nd isotopic ratios are more difficult to achieve for microsamples that contain less than 50ng Nd,when routine Nd technique is applied on thermal ionization mass spectrometer(TIMS).Compared to Nd technique,the NdO technique,owing to more efficient ionization,is a better choice for high precision measurements of Nd isotopic ratios of micro- or low-content *** study presents measurement results of sub-nanogram size samples of standard reference solution and rock-powder using NdO technique on the latest TIMS (GV product IsoProbe-T).Sixteen rock-powder references and four reference solutions were measured both by NdO and Nd techniques for an evaluation of accuracy and precision of measurements obtained by the NdO *** show that analytical precision and reproducibility of NdO measurements of sub-nanogram Nd is comparable with those obtained by the Nd measurements of samples containing 2.0 ng *** precision of the Nd/Nd ratios achieved with both techniques is better than 0.003%.Our results show that the microsample NdO technique is a very promising method for high resolution Sm-Nd geochronology and isotopic tracing.

关键词： NdO+ technique Chromatography Sub-nanogram sample Isobaric interference

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Parameters Identification Applied to Large space Robotic Manipulators

Parameters Identification Applied to Large Space Robotic Man...

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Mechanical Engineering and material science—2.12.International Conference on Mechanical Engineering and material science(MEMS 2.12.

作者： Jingting Sun State Key laboratory of Robotics and System Harbin Institute of technology Harbin {2. Shicai Shi State Key laboratory of Robotics and System Harbin Institute of technology Harbin {2. Fei Zhang tate Key laboratory of Robotics and System Harbin Institute of technology Harbin {2. Xuefei Wang State Key laboratory of Robotics and System Harbin Institute of technology Harbin {2. Hong Liu State Key laboratory of Robotics and System Harbin Institute of technology Harbin {2.

The dynamic parameter of the large space manipulator is the foundation of the design of the control box,the accuracy of the parameters is key to the feature of the *** a dynamic model of the flexible robotic manipulator is built,and some identification researches are carried *** on the model,first the off-line identification is carried out,the stiffness and the friction parameters are *** the manipulator work under the condition of strong radiation,high temperature switch,micro gravity space environment,some dynamic parameter can change,so a modified RLS method is introduced,with the forgetting factor taking into account,some on-line identification are carried *** the experiments are carried out on the HIT large space manipulator and the on-line result are convergent to a stable value close to the off-line result.

关键词： component Manipulator joint dynamic model off-line parameter identification on-line parameter identification

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稀土配合物在有机电致发光器件中的应用

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中国科学：化学 2018年第8期48卷 866-873页

作者：陈凯周亮段羽张洪杰长春理工大学理学院长春130022 中国科学院长春应用化学研究所稀土资源利用国家重点实验室长春130022

作为一类特殊的发光材料,稀土配合物是全彩平板显示器件中理想的发光材料之一,具有独特的优势和重要的地位,因而最早引起了研究人员的广泛关注.本文综述了近年来新型稀土铕、铽配合物的设计合成与基于稀土铕、铽配合物电致发光器件的设... 详细信息

作为一类特殊的发光材料,稀土配合物是全彩平板显示器件中理想的发光材料之一,具有独特的优势和重要的地位,因而最早引起了研究人员的广泛关注.本文综述了近年来新型稀土铕、铽配合物的设计合成与基于稀土铕、铽配合物电致发光器件的设计优化,总结了优化稀土配合物电致发光性能的几种常用途径,进而着重介绍了稀土铕、铽、钆配合物作为敏化剂在有机电致发光器件中的新应用.研究结果表明,稀土配合物作为敏化剂的应用能够实现稀土配合物与过渡金属配合物的优势互补,大幅提高了有机电致发光器件的综合性能,为新型高性能有机电致发光器件的设计与优化提供了新思路.

关键词：稀土配合物电致发光敏化剂

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Pure Electric Bus Crashworthiness Analysis

Pure Electric Bus Crashworthiness Analysis

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Mechanical Engineering and material science—2.12.International Conference on Mechanical Engineering and material science(MEMS 2.12.

作者： Wen-wei Wang National Engineering laboratory for Electric Vehicles Beijing Institute of technology Beijing 100081 {2. Cheng-jun Zhou National Engineering laboratory for Electric Vehicles Beijing Institute of technology Beijing 100081 {2. Jiao-yang Chen National Engineering laboratory for Electric Vehicles Beijing Institute of technology Beijing 100081 {2.

This paper has analyzed the basic theory and material constitutive relation of crashworthiness *** finite element model for vehicle side crash has been built and the side crash simulation with an initial velocity of 50km/h has been *** the structure deformations analysis of each part,the side crash impacts on passenger living space and battery have been predicted and the crashworthiness of the pure electric bus body structure has been tested.

关键词： pure electric bus crashworthiness side crash

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The Image Denoising Method for MEMS Based Uncooled Infrared Imaging System

The Image Denoising Method for MEMS Based Uncooled Infrared ...

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2.10亚洲光电子会议红外、毫米波和太赫兹技术分会场

作者： Huishi Zhu~a,Yuejin Zhao~a,Liquan Dong~(a*),Xiaohua Liu~a,Xiaomei Yu~b,Cheng Gong~a,Mei Hui~a a school of Optoelectronics,Beijing Institute of technology,Beijing,100081,{2. b National Key laboratory of Nano/Micro Fabrication technology,Institute of Microelectronics, Peking university,Beijing,100871,{2.

The uncooled infrared imaging based on MEMS has more and more broad space for development in recent *** uncooled thermal detector array was designed and set up using bi-material micro-cantilever structures,which can bend with the temperature *** effective image points of objects' infrared images which are read out by an optical method from this thermal detector array are *** this reason,the output image should be filtered based on the gray mean value of square window,***,each point of image can be decided to assign zero or restore the initial gray,according to the threshold of gray value summation of the filtered image's single direction template. Comprehensive two directions' data that is in horizontal and vertical,the final result is *** experimental results demonstrate,this algorithm can remove noise well without losing the details of objects' effective image points.

关键词： MEMS Image Denoising Optical Readout Template Threshold

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Experiment Study on Calcination -Digestion- Classification of Rare-earth Containing Phosphorus Ore

Experiment Study on Calcination -Digestion- Classification o...

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2.04年国际稀土研究应用研讨会

作者： ZHANG Qin ZHANG Jie WANG Jing( Guizhou university Of technology Guiyang 550003 {2.)

＜正＞Rare-earth element becomes the key element to develop high and new technique industry due to the special electronic construction. It has extensive applied forture in information, biology, new material, new energy, {2. and ocean 6 new technology clusters. Guizhou province owns very extensive rare-earth *** Xinhua phosphorus ore is enormous rare-earth phosphorus ore deposits,its content is millionton. How to develop Zhijin rare-earth resources economically and validly in Guizhou is an important lesson. It is important to promote the development of district economy , accelerate the development of rare-earth resources efficiently in Guizhou.

关键词： Rare-earth Phosphorus Ore Calcination -Digestion-De-Sliming Separation Zhijin In Guizhou

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基于ANSYS的工程结构仿真实验研究

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实验技术与管理 2010年第4期27卷 67-70页

作者：王建祥苏枋李双喜于建军新疆农业大学水利与土木工程学院新疆乌鲁木齐830052 新疆农业大学教务处新疆乌鲁木齐830052 河北科技师范学院土木建筑系河北秦皇岛066004

针对实验教学设备的不足,介绍了仿真实验的诸多优点：能够弥补实验室硬件条件的局限,可以节约大量的人力、物力和财力,同样的实验可以重复做多次,且缩尺模型实验不具有＂失真＂效应等。根据仿真实验的思路,利用ANSYS软件对L形短肢剪力... 详细信息

针对实验教学设备的不足,介绍了仿真实验的诸多优点：能够弥补实验室硬件条件的局限,可以节约大量的人力、物力和财力,同样的实验可以重复做多次,且缩尺模型实验不具有＂失真＂效应等。根据仿真实验的思路,利用ANSYS软件对L形短肢剪力墙进行了承载能力分析。仿真实验不仅拓宽了实验教学的空间,而且为学生创新能力和科研能力的培养提供了有利的平台。

关键词：工程结构仿真实验 ANSYS软件

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