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RAPD variation within and among four populations of Paris polyphylla
多叶重楼遗传多样性的RAPD分析

ZHANG Jin-Yu,YU Hong,ZHANG Shi-Gang,DING Chang-Chun Laboratory of Ecological Genetics,College of Life Science,Yunnan University,Kunming Inmol Laboratory of Biotechnology of Yunnan,Kunming Agricultural Quality,Standard,Testing for Technology Institute,Yunnan Academy of Agricultural Sciences,Kunming,
张金渝
,虞泓,张时刚,丁长春

生物多样性 , 2004,
Abstract: The randomly amplified polymorphic DNA (RAPD) technique was applied to assess the genetic diversity and structure of four populations of two varieties of Paris polyphylla. As a control, a population of P. cronquistii was compared with the four P. polyphylla populations to determine their phylogenetic relationships. Using 16 random primers, a total of 246 RAPD polymorphic loci were detected. At the population level, the percentage of polymorphic loci (PPB) of two populations of P. polyphylla var. yunnanensis was 57.4% and 54.67%, while Shannon information index (I) was 0.3080 and 0.2830, respectively. The PPB of two P. polyphylla var. chinensis populations was 56.33% and 57.75%, while Shannon information index (I) were 0.3080 and 0.3293, respectively. At the variety level, the PPB, I and Gst values of P. polyphylla var. yunnanensis were 75.14%, 0.3922, and 0.3085, respectively, while those of P. polyphylla var. chinensis was 80.31%, 0.3992, and 0.3726, respectively. At the species level, the PPB was 92.05%, and Gst was 0.5151. The UPGMA dendrogram showed that the two varieties of P. polyphylla are more related to each other than to P. cronquistii, which supports the previous treatment of P. polyphylla var. yunnanensis and P. polyphylla var. chinensis as two varieties within P. polyphylla based on gross morphology.
STUDIES ON THE ACCUMULATION OF HEAVY METALS AND THEIR EFFECT ON THE GROWTH AND METABOLISM IN EDIBLE FUNGI
重金属在食用菌中的富集及对其生长代谢的影响

SHI QIAO-QIN,LIN LIN,CHEN ZHE-CHAO,CHEN SHONG-SHENG,XIE BI-FENG,WU SONG-GANGInstitute of Microbial Engineering,Fujian Normal University,Fuzhou CHEN JING-YI,KE YI-LONG,LI XING-MINGFujian Institute of Testing Technology,Fuzhou,
施巧琴
,林琳,陈哲超,陈松生,谢必峰,吴松刚,陈静仪,柯毅龙,李贤明,林园

菌物学报 , 1991,
Abstract: The absorption and accumulation of heavy metals in edible fungi and the effects of heavy metals on the growth and the metabolism of edible fungi were investiga- ted.The results showed that Lentinus edodes,Pleurotus membrancens,Flammulina velueipes and Auricularia auricula accumulate Hg,As,Ni,Cd,Cu,Zn,Pb to various degrees.Among the heavy metals tested,Hg was highly accmulated by edible fungi.But the accumulation of Pb was weak.The examination of edible fungi from different producing areas in Fujian pro- vince indicated that the content of heavy metals in the fruiting bodies of all edible fungi were below the hygienical standards. Heavy metals mentioned above were harmful to the growth and yield of edible fungi,es- pecially Hg and As.They could activate Vitamin C oxidase and inhibit cellulase.
DESULFURIZATION OF CAST IRON BY ELECTROLYZING SLAG

Northeast Institute of Technology,The Institute of Foundry Practice,

金属学报 , 1959,
Abstract: In the present communication, a method for desulfurizing cast iron by electrolyzing slag wasdescribed. Experimental results obtained with this method warranted the following conclusions: (1) Among the various methods used for desulfurization of cast iron, the method describedin the present communication is the most effective and cheap one, especially for cast iron withsulfur content higher than one percent. (2) The percentage of sulfur reduction increases with the basicity (CaO/SiO_2) of the slag.For example, for slag with basicity of 0.5, the percentage of sulfur reduction is 72; while for slagwith basicity of 1.4, the percentage of sulfur reduction is 97.5. (3) The initial sulfur and carbon content of cast iron has an obvious effect on the processof desulfurization. As the sulfur and carbon content increases, the process of desulfurization pro-ceeds more completely. (4) There is a critical current density of the cathode (molten cast iron). At the criticalpoint, the percentage of sulfur reduction is the highest. As the current density exceeds the criticalvalue, the percentage of desulfurization decreases. (5) The percentage of desulfurization increases with the voltage of electrolysis. (6) If it is possible to prolong the process of electrolysis, the percentage of sulfur reductionincreases with the time of electrolysis. The mechanism of desulfurization by electrolyzing slag was also briefly discussed.
MATHEMATICAL MODELING OF INITIAL SOLIDIFICATION IN CONTIN UOUS CASTING
SOgibayashi Chiba Institute of Technology,

金属学报(英文版) , 1999,
Abstract: Many mathematical modelshavebeen developed sofar, butthereisstill much tobe donefor mathematical modelingin thefield of initialsolidification. This paper reviewsthe mecha nism of irregular solidification and mathematical modeling of irregular solidification andlongitudinalcrackformation. Main responsiblefactorsforirregularsolidification areconsid eredtobe nucleationofsolid phaseonthe moldsurfaceandshelldeflection duetothermalcon traction ofshell. Someofrecent worksonshellirregularity andcrackformation arepresented including a new model of shell irregularity, in which heat flow and shell deflection are linked in the calculation, and a strain model which takes account of frictional forcein the transverse direction. In orderto develop a quantitative modelto predictlongitudinalcrack, fartherstudy willbeexpected in revising and linkingthese models.
SYMMETRICAL SISF IN DEFORMED Ni_3Al AND ITS FORMATION MECHANISM
YAN Wen Xi′an Institute of Technology,Xi′an,China
金属学报(英文版) , 1992,
Abstract: The symmetrical superlattice intrinsic stacking faults(SISFs)formed on {111} planes are the predominant crystal defects in polycrystalline Ni_3AI after slight deformation at room temper- ature.The formation of this kind of SISF is resulted from the dipoles which are distributed on the neighboring {111} planes after reorientation,dissociation and annihilation under applied stress.
1997/98 BCIT Distance Education Survey Executive Summary
British Columbia Institute of Technology BCIT-CANADA
The Turkish Online Journal of Distance Education , 2002,
Abstract:
EVALUATION OF PERMEABILITY STABILITY OF SEVERAL AMORPHOUS FERROMAGNETIC ALLOYS
几种非晶态铁磁合金的磁导率稳定性的估计

ZHANG Yanzhong Shanghai Iron,Steel Research Institute ZHANG Yanzhong senior engineer,Steel Research Institute,Shanghai Measuring,Testing Centre,Shanghai Iron and,
张延忠

金属学报 , 1989,
Abstract: 本文根据非晶态铁磁合金的磁导率衰减动力学的实验数据得到的经验公式,利用平均激活能和频率因子的实验值估计了预退火的非晶合金Fe_(76)Si_(10)B_(14),Fe_(40)Ni_(38)Mo_4B_(18)和(Fe_(0.1)Ni_(0.35)Co_(0.55))_(78)Si_8B_(14)的起始磁导率的相对稳定程度。计算结果表明,虽然不能实质上消除磁导率的不稳定性,但是大约在不超过100℃的温度范围内,磁导率相对稳定程度对实际应用是足够的。换句话说,在相当长时间内,磁导率衰减相当小。
SYMMETRICAL SUPERLATTICE INTRINSJC STACKING FAULTS IN DEFORMEDPOLYCRYSTALLINE Ni_3 Al AND THEIR FORMATION MECHANISM
形变Ni3Al多晶体中的对称型堆垛层错及其形成机理

YAN Wen Xi''''an Institute of Technology Correspondent associate professor,xi''''an Institute of Technology,
严文

金属学报 , 1991,
Abstract: TEM analysis and computer simulation of the symmetrical superlattice intrinsic stacking faults (SISFs) in slightly deformed polycrystalline Ni_3Al at room temperature are presented. The symmetrical SISFs are important components of the crystal defects in deformed Ni_3Al alloys; the formation mechanism of the symmetrical SISF can be resulted from the reorientation, dissociation and annihilation of a dipole on {111} plane under applied shear stress.
TRACKING OBSERVATION ON SUBSURFACE CRACKING IN GCr15 BEARING STEEL UNDER ROLLING CONTACT FATIGUE
GCr15轴承钢接触疲劳次表面裂纹的跟踪观察

CHEN Longqing Zhengzhou Institute of Technology,CHEN Qing Luoyang Institute of Technology,
陈隆庆
,陈箐

金属学报 , 1991,
Abstract: Based on the sequent tracking observation on spalling of GCr15 bearing steel under rolling contact fatigue, an expression for estimating the propagation of subsurface cracks was derived. The rolling contact fatigue life was found to be markedly related the subsurface crack propagation angle. A new explanation of reason why the rolling contact fatigue life can be prolonged by residual compressive stress and retained austenite was advanced.
CHANGE OF BORIDE IN Fe_(70)Cr_(18)Mo_2SiB_9 WITH THERMAL TREATMENT
LIN Yijian HU Jian YOU Yunlong JING Chunyong YU Quanqin Shanghai Iron,Steel Research Institute,Shanghai,China LIN Yijian Measuring,Testing Centre,Shanghai Iron,Steel Research Institute,Shanghai,China,
LIN Yijian HU Jian YOU Yunlong JING Chunyong YU Quanqin Shanghai Iron and Steel Research Institute
,Shanghai,China LIN Yijian Measuring and Testing Centre,Shanghai Iron and Steel Research Institute,Shanghai,China

金属学报(英文版) , 1990,
Abstract: The formation of borides M_3B_2 M_2B_2 and M_(23)B_6 may be carried out from the melt-quenchedFe_(70)Cr_(18)Mo_2SiB_9 during 700—1150℃ annealing.As the temperature raising,the M_2B,themajority being Fe_2B.may be gradually replaced by Cr_2B via the co-existence between Fe_2Band Cr_2B.The Cr_2B may be formed by trans formation of Fe_2B through the atomic substitu-tion and structural adjustment.The thin slice of remaining Fe_2B is sandwiched between(100)faces of(Cr,Fe)_2B as stacking fault.The M_2B_2 is virtually composed of theMo_(1+x)(Fe,Cr)_(2-x)B_2 where x(0≤x≤1)increases with the increase of temperature.
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