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Search Results: 1 - 10 of 498014 matches for " <br>李学德 "
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PAEONIA IN XINJIANG,CHINA
新疆的芍药属

Hong De-yuan Pan Kai-yu,<br>洪,
植物分类学报 , 1994,
Abstract: The present paper deals with the genus Paeania in Xinjiang, whose taxonomy has been confused. Based on the field observation, population sampling and the examination of herbarium specimens, a taxonomical revision is made in this paper. Two species are recognized , i. e. Paeania. anamala L. and P. sinjiangensis K. Y. Pan. P. altaica K. M. Dai et T. H. Ying is reduced to P. sinjiangensis and P. hybrida (= P. anamala var. intermedia) is reduced to P. anamala. The diagnostic characters of the two species are described and illustrated, and a map of their distribution in Xinjiang is presented. A key to these two species is provided here. 1. Roots straight, not thickened; sepals all caudate, less frequently one or very rarely two non-caudate ................................................ 1. P. sinjiangensis K. Y. Pan. 2. Roots fusiform or tuberous; inner three sepals non-caudate, less frequently one of them caudate ........................................................................ 2. P. anomala L.
Heterosis of colored hybrid cotton by using Cytoplasmic Male-sterility (CMS).
细胞质雄性不育彩色棉杂种优势的表现

LI Yue you,WANG Xue de,<br>悦有,
浙江大学学报(农业与生命科学版) , 2002,
Abstract: 利用棕色棉细胞质雄性不育系和恢复系配制的 19个杂种 F1表现出显著的杂种优势 ,平均单株铃数和皮棉产量比棕色棉对照品系 G0 0 8分别增加 3.9个和增产 15 .2 % ,其中 9个组合的增产幅度为 15 .6%~ 4 8.1% .尤其是 ZJ12× ZJ0 2组合的皮棉产量较常规推广良种“中棉所 12号”增产 4 .1% .在纤维品质上 ,与棕色棉对照相比 ,有 8个组合的纤维长度显著增长 2 .6~ 4 .8mm,幅度为 10 .5 %~19.4 % ;比强度增加 0 .1~ 2 .9c N/ tex,其中 4个组合的增幅为 10 .8%~ 16.5 % ;马克隆值低 0 .5~ 1.7,降幅为 2 6.0 %~ 34 .0 % .在浙江大学农业试验站的制种田 ,不育系分别与保持系、恢复系按 2∶ 1比例间隔种植 ,昆虫自然传粉 ,能得到高的异交率 .不育系的繁种产量和杂种的制种产量分别为 194 8.5 kg/hm2和 12 82 .5 kg/ hm2 ,杂种 F1的皮棉产量与亲本相比超亲优势达 36.1% .表明利用棉花细胞质雄性不育的杂种优势在改良彩色棉产量和品质上有显著作用
Study on extraction and quantification of fiber pigment matter in colored cotton
彩色棉纤维色素提取和测定方法的研究

WANG Xue de,LI Yue you,<br>王,悦有
浙江大学学报(农业与生命科学版) , 2002,
Abstract: Pigment matter in mature fibers of brown or green cotton was extracted by organic solvent (ethanol, aether and dimethylbenzene), acid and alkaline solution, and HNO 3/ethanol. The comparison of three extraction methods showed that pigment matter in colored fiber cells could be effectively extracted out only by HNO 3/ ethanol distillation. There was a maximum absorbance peak at 412 nm for fiber pigment solutions from HNO 3/ ethanol distillation. Absorbance readings of sample solutions at this wavelength were associated with fiber color and its intensity, for brown or green fibers increased with fiber color deepening (0.063 4 0.990 0) and for white fibers only had a negligible quantity (0.007 2). Therefor, it was suggested that the HNO 3/ethanol distillation method for extraction and quantification of fiber pigment be in favor of comparison of the color intensity for colored cotton varieties. When brown or green fibers were treated with acid or alkaline solutions, fiber color not only changed with pH value and but also restored to original color at pH7. There was a negative relationship between pigment and cellulose content in colored fibers.
Observation of ultrastructure of colored cotton fiber
彩色棉纤维的超微结构观察

LI Yue you,WANG Xue de,<br>悦有,
浙江大学学报(农业与生命科学版) , 2002,
Abstract: Electron microscopic examination of white, brown and green fiber revealed that each of these three types of fiber cells was composed of primary wall, secondary wall and lumen from outside to inside The white fiber cell hadn't been found any deep dyed matter in wall and lumen The green fiber cell had numerous concentric osmiophilic rings around the lumen, whereas white and brown fibers had no these rings It was supposed that these rings be formed day by day during green pigment deposition The brown fiber cell not only had a large lumen deposited by plenty of deep dyed substance, but also had a fork structure which grew up to a branch from the main lumen of fiber cell After measured the quality of colored fiber, it was very unluckily that the colored fibers had comparatively poorer quality than the whiter fiber, which might be related to lower cellulose content and pigment matter accumulation in colored fibers
Study on characteristics of colored cotton fiber development
彩色棉纤维发育的特性研究

WANG Xue de,LI Yue you,<br>王,悦有
浙江大学学报(农业与生命科学版) , 2002,
Abstract: Pigment matter in fiber cells of brown or green cotton could be extracted by HNO 3/ethanol distillation, and its content could be estimated by absorbance reading at 412 nm for distillation solution Pigment matter in brown or green cotton fiber cells could be obviously detected when fiber cells grown up to about 15 days post anthesis (DPA), reaching a maximum content at 20 DPA Fiber color change from white to brown in the boll of brown cotton was not found until 30 35 DPA, and brown color was very stable and even deepening in the sunlight However, fiber in the green cotton boll began to be colored green at 20 DPA, after this, fiber color was gradually deepened with fiber development, but easy to fad in the sunlight Cellulose content in brown or green cotton fiber was significantly lower than in white cotton fiber, which might be caused by accumulation of fiber pigment matter Between 15 and 30 DPA, the pH in white fiber cells lowered rapidly, while that in brown or green fiber cells slowly It was suggested that a rapid or slow decline for fiber cell pH during this period might bring some effects on fiber cell elongation, secondary wall synthesis and color change Comparing with white fiber, quality of brown or green colored fibers was lower, such as shorter length and weaker strength, which possible reason was discussed in the paper
Development of cytoplasmic male-sterile, maintainer and restorer lines in colored cotton and construction of their DNA fingerprints.
彩色棉雄性不育系、保持系和恢复系的选育及DNA指纹图谱的构建

WANG Xue de,LI Yue you,<br>王,悦有
浙江大学学报(农业与生命科学版) , 2002,
Abstract: 用杂交育种技术,将综色棉纤维性状转育到棉花细胞质雄性不育系、保持系和恢复系中,有成了一套棕色棉细胞质雄性不育系统的三系:“棕A-ZJ12”、“棕B-ZJ015”和“棕R-ZJ02”。在浙江大学农业试验站,不育系分别与保持系、恢复系按2:1的比例间隔种植,昆虫自然传粉,繁种产量和制种产量分别为1948.5kg/hm^2和1282.5kg/hm^2,杂种“棕杂1号”的皮棉产量为1266.0kg/hm^2,表现为起亲优势,不育系“棕A-ZJ12”为完全雄性不育类型,它的花药体积、花药鲜重、柱头长度、受精前胚珠体积及鲜重均显著低于保持系和恢复系。应用AFLP技术,获得了棕色棉“三系”及杂种F1的DNA指纹图谱,在18对引物的扩增片段中存在52处多态性。表明AFLP是一种十分有效的DNA指纹技术,它具有多态性丰富、稳定性高、重复性好等优点。
Cytological observation of cytoplasmic male-sterile anther of brown cotton.
棕色棉细胞质雄性不育花药的细胞学观察

LI Yue you,WANG Xue de,XU Ya nong,<br>悦有,,徐亚浓
浙江大学学报(农业与生命科学版) , 2002,
Abstract: Cytological observation of microsporogenesis was performed for a cytoplasmic male sterile (CMS) line of brown cotton comparing with its maintainer line. The result showed that abortion of auxocyte cells in CMS anthers took place during the development periods of sporogneous cells and microspore mother cells (MMC's). Abortion characteristics were abnormal behavior of chromosomes, formation of multi micronucleli in one cell, high frequency of nucleolus penetration through nucleus envelop and cell wall, high vacuolization of cytoplasm and coalescence of MMC's. As compared with the tapetal cells of the fertile anther, those of the sterile anther were significantly smaller and vaculolarer. It was suggested that the abnormality of tapetum development was associated with the abortion of MMC's.
Sorption of Cu( Ⅱ ) and Cd( Ⅱ ) by natural biofilms
自然水体生物膜对铜(Ⅱ)、镉(Ⅱ)的吸附研究

TIAN Chao,ZHANG Yuanyuan,QIU Zhiguo,LI Xuede,<br>田超,张园园,邱治国,
环境科学学报 , 2007,
Abstract: With high adsorption capability and adsorption surface area, biofilms are actively researched, especially in the area of adsorption of heavy metals. Heavy metal adsorption is greatly affected by the method of developing the biofilm. A biofilm was developed in Dongpu reservoir on the surface of a cotton thread. The characteristics and thermodynamics of Cu and Cd adsorption on the biofilm were studies. Statistical analysis of the adsorption data showed that the thermodynamic data for each metal fit the Freundlich(F) and Langmuir(L) isotherms. The capacity of adsorption of Cu was greater than that for Cd. The adsorption of both Cu and Cd reached equilibrium in less than one hour and fit a second-order kinetics equation. The adsorption of Cu and Cd increased with pH up to pH 7.
基于辐射标定的机械零件精密测量方法研究
Research on Precision Measurement of Machine Part Based on Radiometric Calibration
 [PDF]

, 相旭, 刘咏梅
Computer Science and Application (CSA) , 2013, DOI: 10.12677/CSA.2013.34037
Abstract:
提出了一种基于辐射标定的机械零件精密测量方法。通过辐射标定求出摄像机CCD传感器的响应函数,建立图像灰度值与传感器收集的辐射能量之间非线性映射关系,恢复了图像中机械零件的真实场景,使机械零件的边缘轮廓更加接近实际。实验表明,该方法有效地提高了机器视觉的测量精度,在机械零件非接触测量领域具有重要的意义。
In this paper, a precision measurement method of machine part based on radiometric calibration was proposed. According to radiometric calibration, the response function of our camera’s CCD sensor was obtained, and the non-linear mapping relations between image gray value and the radiant energy of machine part were established. Based on this, the real size of machine part in image was restored. The experiments showed that this method can effectively improve the measurement accuracy, and it would be of great importance in non-contact measurement field of machine part.
Photochemical degradation of chlorothalonil in aqueous solution
百菌清(chlorothalonil)在水中的光化学降解

LI Xuede,HUA Rimao,YUE Yongde,LI Ying,TANG Feng,TANG Jun,<br>,花日茂,岳永德,,汤锋,唐俊
应用生态学报 , 2006,
Abstract: The study on the effects of light source, solution pH and temperature, and surfactant on the photochemical degradation of chlorothalonil showed that the half-life of chlorothalonil photodegradation under high pressure mercury lamp (HPML), UV lamp and sunlight was 22.4, 82.5 and 123.8 min, respectively. Under HPML and sunlight, chlorothalonil had a higher photolysis rate in alkaline solution than in neutral and acid solution. The photolysis rate increased with increasing solution temperature in the range of 10 degrees C - 40 degrees C, which was doubled when the temperature increased every 10 degrees C. Sodium laurylsulfonate (SDS), sodium dodecylbenzene sulfonate (SDBS), Tween 60 and Span 20 showed significant photosensitizing effects, while cetyltrimethylammonium bromide (CTAB) had significant photoquench effect on the photolysis of chlorothalonil.
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