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Search Results: 1 - 10 of 366325 matches for " <br>秦永林 "
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Germination and Propagartors of Artificial Seeds of Dendrobium huoshanense
霍山石斛人工种子包埋繁殖体和萌发

Ziqing Qin,Ting Zhao,Jing Qiu,Yi Lin,Yongping Cai,<br>自清,赵婷,邱婧,,
微生物学报 , 2008,
Abstract: The artificial seeds of Dendrobium huoshanese was produced with Auxiliary buds, Protocorm-like bodies, and adventitious shoots. By using orthogonal experiment, we studied the effect of Maltose (%), hormone rate between 6-BA (mg·L-1) and NAA (mg·L-1), active carbon(%) , sodium alginate (%), time of ion exchange (min) on germination rate of artificial seeds of D. huoshanese. Then the leaking rate of maltose and variation of pH value of artificial seed capsule during vegetating of artificial seeds of D. huoshanese was measured. The results show that maltose played the most important role in inducing D. huoshanese artificial seeds to germinate. The optimal combination was: maltose 4%, hormone rate between 6-BA (mg·L-1) and NAA (mg·L-1) 10:1, active carbon 0.1%, sodium Alginate 4%, time of ion exchange is 10 min. Protocorm-like bodies were appropriate propagartor, the germination rate of artificial seeds of D. huoshanese takeing Protocorm-like bodies as the propagartors is 90.1%. After germination, the survival rate of seedlings of artificial seeds was 80.6%, the leaking rate of maltose of artificial seed capsule was 0.52%, and the pH value of artificial seed capsule decreased during the process of vegetation of artificial seeds. After having been stored at 4oC for 20 d, the germination rate of artificial seeds of D.huoshanese takeing Auxiliary buds, Protocorm-like bodies, Adventitious shoots as the propagartors were 3.3%, 10.6%, 5.2%. Under natural conditions the germination rate was 13.8% after 10.0 g/L carbendazim was appended into artificial seed capsule. This result provides a foundation of manufacture and further study of the artificial seeds of D. huoshanese.
A study on spin-polarized transport properties in magnetic-electric barrier structures
磁电垒结构中自旋极化输运性质的研究

Qin Jian-Hu,Guo Yong,Chen Xin-Yi,Gu Bing-Lin,<br>建华,,陈信义,顾秉
物理学报 , 2003,
Abstract: We investigated spin-polarized transport properties for electrons tunneling through a few of magnetic-electric barrier structures.The general formula of the transmission was derived.The relationship between the spin-polarization and the distribution of the nonhomogeneous magnetic field was revealed.Furthermore,our results also indicated that the spin-filtering effect can be enhanced significantly when a semiconductor with a larger g factor is used.
Germination and Propagartors of Artificial Seeds of Dendrobium huoshanense
霍山石斛人工种子包埋繁殖体和萌发

Ziqing Qin,Ting Zhao,Jing Qiu,Yi Lin,Yongping Cai,<br>自清,赵婷,邱婧,,
生物工程学报 , 2008,
Abstract: The artificial seeds of Dendrobium huoshanese was produced with Auxiliary buds, Protocorm-like bodies, and adventitious shoots. By using orthogonal experiment, we studied the effect of Maltose (%), hormone rate between 6-BA (mg·L-1) and NAA (mg·L-1), active carbon(%) , sodium alginate (%), time of ion exchange (min) on germination rate of artificial seeds of D. huoshanese. Then the leaking rate of maltose and variation of pH value of artificial seed capsule during vegetating of artificial seeds of D. huoshanese was measured. The results show that maltose played the most important role in inducing D. huoshanese artificial seeds to germinate. The optimal combination was: maltose 4%, hormone rate between 6-BA (mg·L-1) and NAA (mg·L-1) 10:1, active carbon 0.1%, sodium Alginate 4%, time of ion exchange is 10 min. Protocorm-like bodies were appropriate propagartor, the germination rate of artificial seeds of D. huoshanese takeing Protocorm-like bodies as the propagartors is 90.1%. After germination, the survival rate of seedlings of artificial seeds was 80.6%, the leaking rate of maltose of artificial seed capsule was 0.52%, and the pH value of artificial seed capsule decreased during the process of vegetation of artificial seeds. After having been stored at 4oC for 20 d, the germination rate of artificial seeds of D.huoshanese takeing Auxiliary buds, Protocorm-like bodies, Adventitious shoots as the propagartors were 3.3%, 10.6%, 5.2%. Under natural conditions the germination rate was 13.8% after 10.0 g/L carbendazim was appended into artificial seed capsule. This result provides a foundation of manufacture and further study of the artificial seeds of D. huoshanese.
SYNTHESIS OF HIGH MOLECULE WEIGHT POLYCARBOSILANE
高分子量聚碳硅烷合成研究

XUE Jingen,WANG Yingde,Song Yongcai,Qin Molin,<br>薛金根,王应德,,
高分子学报 , 2007,
Abstract: 采用正交设计的方法从常压合成得到的中低分子量聚碳硅烷(PCS)出发,进行热压合成制备高分子量的PCS;并运用红外、GPC、核磁共振等分析测试手段对其结构和性能进行了表征.研究表明,采用从常压合成得到的中低分子量PCS出发进行热压合成的化学方法,可以制备得到高分子量的PCS;控制热压反应温度在460-470℃、预加压力1-2 MPa、反应6 h得到先驱体PCS的Mw在6400-8500之间;热压合成后制得的高分子量PCS的支化度有所降低;通过控制热压反应时间可以较好的调控高分子量PCS重均分子量的大小.
Biological cycling of nutrients in different ages classes of Acacia mangium plantation
不同年龄阶段马占相思( Acacia mangium)人工林营养元素的生物循环

HE Bin,QIN Wu-Ming,YU Hao-Guang,LIU Yun-Hua,QIN Lin,QIN Yong-Hua,<br>何斌,武明,余浩光,刘运华,,
生态学报 , 2007,
Abstract: 对马占相思人工林6种营养元素(N、P、K、Ca、Mg、S)的含量、积累、分布和生物循环特点以及随林分年龄的变化趋势进行了研究。结果表明:(1)林木不同组分营养元素含量的大小次序为树叶>干皮>活枝>枯枝或树根>干材;各组分和凋落物中营养元素含量以N最高,其次是Ca或K,然后是S和Mg,P最低;林地土壤中,以K的含量最高,其次是Ca、Mg、N和P,S最低;随林龄的增加,0~40cm土壤N、P和S含量呈增加趋势;(2)4年、7年生和11年生林分营养元素总积累量分别为1022.08、1997.08和2633.45 kg hm-2,其中乔木层营养元素贮存量依次占73.64%、82.39% 和83.65%,林下植被层依次占13.74%、8.74%和620%,地表现存凋落物层依次占12.62%、8.87%和10.16%;乔木层以N积累量最大,占总贮存量的53.90%~60.07%,P最小,仅占0.90%~1.23%;(3)马占相思林中不同组分营养元素积累量的分配随林龄的增长发生变化,由4年生以树叶和树枝占主导,逐渐转移到7年生和11年生以干材和树皮为主导;(4)林分营养元素年积累量依次为7年生(235.06 kg hm-2 a-1)>11年生(200.26 kg hm-2 a-1)>4年生(188.16kg hm-2 a-1);林木各组分营养元素年积累量总的变化趋势为:树干>树叶>树枝>根系>树皮,同一组分各营养元素年积累量与各组分营养元素积累量变化顺序一致,即为N>Ca>K>S>M>P;(5)林分营养元素年吸收量分别为382.35、432.04 kg hm-2 a-1和403.15 kg hm-2 a-1,年归还量分别为194.19、196.98 kg hm-2 a-1和202.89 kg hm-2 a-1,营养元素的循环系数分别为0.51、0.46和0.50,利用系数为0.51、0.26和0.18,周转期为3.88、8.35和10.86。可见,马占相思人工林早期营养元素利用率低,归还速率较快,林分生长到近熟期(11a)时营养元素的周转期较长,但其归还速率仍然较快,有利于林地地力的恢复、维持和提高。
Early Paleozoic adakitic rocks in Heishishan, Gansu and their significance for tectonodynamics
甘肃黑石山早古生代埃达克质岩的发现及其构造动力学意义

Wang JinRong,Guo YuanSheng,Fu ShanMing,Chen JianLin,Qin XiuFeng,Zhang HongPei,Yang YongJun,<br>王金荣,郭原生,付善明,陈建,秀峰,张洪培,
岩石学报 , 2005,
Abstract: 笔者近期在甘肃黑石山地区早古生代火成岩的研究中发现了埃达克质岩,埃达克质岩的岩石类型为奥长花岗岩、花岗闪长岩及花岗癍岩,侵入于北祁连东段的白银陆缘弧火山岩中。岩石具高Sr低Y,Sr/Y>40;富钠贫钾(Na2O/K2O>2), 富SiO,但含量变化不大;富集LREE,亏损重稀土元素,La/Yb>20,无Eu负异常或轻微正异常(δEu=1.0-1.19)。与典型的俯冲板块熔融的埃达克岩比较,黑石山埃达克质岩具有更高的SiO2含量和更低的MgO、Mg#(-46)、Cr(均11.6μg/g)、Ni(均 6.52μg/g),未显示出初始埃达克质熔体与地幔橄榄岩明显的交代过程,因而不大可能由俯冲板块直接熔融形成的;与中国东部燕山期高钾钙碱性埃达克岩相比,具有较高的Na2O(Na2O>4.0%;Na2O/K2O=1.97-2.59),但类似Cordilera Blanca岩基的(非板片熔融成因的埃达克质岩),推测形成于加厚的陆缘弧中基性下地壳的部分熔融。黑石山埃达克质岩的发现表明, 在早古生代晚期,北祁连东段经历了洋盆闭合、板块碰撞、陆缘弧地壳加厚、玄武质岩浆底侵作用及下地壳再造作用的构造演化过程。同时指出,在本区寻找与埃达克质岩有关的斑岩型铜、金矿可能是一个新的有希望的找矿方向。
Water and fertilizer use efficiency of potato under different irrigation patterns in North Yin Mountain Region
阴山北麓马铃薯在不同灌溉模式下的水肥效率

QIN Yong-Lin,JING Tao,KANG Wen-Qin,TIAN Yan-Fang,FAN Ming-Shou,<br>,井 涛,康文钦,田艳芳,樊明寿
中国生态农业学报 , 2013,
Abstract: The North Yin Mountain Region (NYMR), the main potato production region in Inner Mongolia, is highly limited in water resources. Water-saving cultivation techniques have therefore been increasingly used in this region in recent years. To evaluate the effects of different irrigation methods on water and nutrient use efficiency and the eco-environmental benefits of potato cultivation, field experiments were conducted in 2009-2010 in the Wuchuan Region of NYMR, Inner Mongolia. The field experiment was consisted of four different irrigation patterns - flood irrigation (FI), ground sprinkler (GS), drip irrigation (DI) and under-mulch-drip irrigation (UMDI). The irrigation patterns were compared in terms of potato tuber yield, water and nutrient use efficiency, net economic income and soil inorganic nitrogen residue. The results showed that UMDI increased potato yield over conventional farm practice FI, GS and DI by 35.7%, 26.0% and 12.9%, water use efficiency by 200.2%, 91.8% and 23.7% and net economic income by 37.7%, 30.1% and 10.7%, respectively. Nitrogen fertilizer partial factor productivity under UMDI was respectively 50.6 kg·kg-1, 39.8 kg·kg-1 and 22.0 kg·kg-1 higher than those under FI, GS and DI. Also phosphorus fertilizer partial factor productivity under UMDI was respectively 126.6 kg·kg-1, 99.4 kg·kg-1 and 55.0 kg·kg-1 higher than those under FI, GS and DI. Then potassium fertilizer partial factor productivity under UMDI was respectively 42.3 kg·kg-1, 33.2 kg·kg-1 and 18.4 kg·kg-1 higher than those under FI, GS and DI. Soil inorganic nitrogen residue in the 60~120 cm soil layer after potato harvest was 102.95 kg·hm-2 under FI, which was 0.36, 1.11 and 1.28 times higher than those under GS, DI and UMDI, respectively. The above results suggested that DI and UMDI not only saved water resources, but also enhanced potato yield, nutrient use efficiency and net economic income in the research area. This was critical for reducing the risk of environmental pollution due to nitrogen leaching. It was therefore important to intensify DI and UMDI irrigation patterns in potato fields in the NYMR for higher yields, resources use efficiencies and low environmental pollution risks.
γ-radiation induced sulfadiazine removal in aqueous solution
γ辐照降解水中磺胺嘧啶的研究

GUO Zhaobing,ZHOU Fei,ZHAO Yongfu,ZHANG Chaozhi,BAO Chunxiao,QIN Kaigui,LIN Mingyue,<br>郭照冰,周飞,,张超智,包春晓,开桂,明月
环境科学学报 , 2011,
Abstract: 实验研究了水中磺胺嘧啶(SD)的γ辐照降解,考察了SD初始浓度、溶液pH值,以及联合H2O2、Fenton试剂对其辐照降解的影响.结果表明:γ辐照可有效降解水中SD,低浓度SD在酸性条件下的辐照降解更为显著,降解过程遵循准一级反应动力学模型.添加H2O2可在一定程度上促进SD的γ辐照降解,加入Fenton试剂则显著提升SD的去除率.根据量化计算和LC-MS结果,探讨了SD的γ辐照降解机理.γ辐照降解水中SD主要是基于.OH自由基的氧化过程.
西藏班公湖-怒江缝合带西段洞错蛇绿岩中的辉长岩锆石U-Pb年代学及地质意义
Zircon U-Pb Ages of Dongcuo Ophiolite in Western Bangonghu-Nujiang Suture Zone and Their Geological Significance

武勇,陈松,明宽,郭冬发,郭国,张财,杨经绥<br>Wu Yong, Chen Songyong, Qin Mingkuan, Guo Dongfa, Guo Guolin, Zhang Cai, Yang Jingsui
地球科学(中国地质大学学报) , 2018, DOI: 10.3799/dqkx.2018.710
Abstract: 洞错蛇绿岩位于班公湖-怒江缝合带西段阿里地区,前人对其空间展布、构造环境及成因有过一定的探讨,但研究程度薄弱.选择洞错蛇绿岩中的辉长岩为研究对象,对其开展详细的岩相学、地球化学、年代学等工作,解读洋盆的形成时间及构造环境.结果表明,辉长岩与N-MORB相比具有较高的Mg#,低K、Na、P和Ti的元素特征,亏损Hf、Zr、Nb等高场强元素(HFSE),具有轻稀土亏损型配分模式,表明可能源于N-MORB型亏损地幔源区. 地球化学元素研究表明辉长岩岩浆源自亏损的尖晶石二辉橄榄岩~30%部分熔融,可能形成于与洋内俯冲相关的岛弧或者弧前构造环境,属于SSZ型蛇绿岩.辉长岩锆石的U-Pb测年指示其结晶年龄为222±4.8 Ma(MSWD=0.5,n=28),代表了辉长岩的形成年龄,佐证了洞错蛇绿岩形成于晚三叠世,表明班公湖-怒江特提斯洋盆从晚三叠世开始存在洋内俯冲消减地质作用.
The Dongcuo ophiolite is located at the western part of Bangong-Nujiang River suture zone, Gaize County. In spite of previous studies on its spacious distribution, tectonic environment and genesis, the key problem remains unresolved. Taking the gabbro of Dongcuo ophiolite as the research object, a detailed study of petrography, geochemistry, petrology and geochronology is carried out to understand the formation of Bangong-Nujiang ocean basin, the tectonic settings of the Dongcuo ophiolite. Compared with N-MORB, the major and trace elements of Dongcuo ophiolite are characterized by high content in Mg# and low content in K, Na, P, and Ti , the depletion of high field-strength elements (HFSE) of Hf, Zr, Nb and light rare earth element depletion. Geochemistry characteristics of the Dongcuo ophiolite indicate that it is originated from ~30% partial melting of depleted spinel lherzolite formed in the tectonic environment of subduction-related island arc or fore arc, belonging to super subduction zone (SSZ) ophiolite. The LA-ICP-MS of zircon U-Pb dating yields the age of 222±4.8 Ma (MSWD=0.5), providing the age constraint on the Dongcuo ophiolite (Late Jurassic), and showing that it belongs to the Tethyan system of the Bangong-Nujiang River suture zone, which indicates the intra-oceanic subduction process
THE ASYMPTOTIC DISTRIBUTION OF THE QHSTATISTIC UNDER DOUBLE SIDE CENSORING
双边截断情形下QH 统计量的渐近分布

Qin Yongsong,<br>
系统科学与数学 , 1999,
Abstract: To test for normality, Chen and Shapiro1] proposed the following statisticQH where X1n, X2n,' , Xnn are order statistics from a random sample of size n, Hi = H, S =((n - 1)-1 , and H is the inverse of the standard normal distributionfunction. Under some conditions, we obtain here the asymptotic distribution of QH statisticunder double side censoring.
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