数字化管道及其应用现状   总被引：7，自引：0，他引：7  

杜丽红  姚安林 《油气储运》2007,26(6):7-10

随着数字地球这一概念的引入,数字化管道已成为管道建设中的一个新理念。叙述了数字化管道的概念、关键技术、应用现状和建设数字化管道所涉及的工作,认为实现管道数字化,将会快速提高管道的建设和运营管理水平,促进管道事业的发展。  相似文献   

5个烤烟新品种与云烟87的比较研究     

郭东锋  姚忠达  舒俊生  吴克松  周初跃  杜丛中  王忠平  罗应坤  李兰周  崔宇翔  杨焕文  李佛琳 《云南农业大学学报(自然科学版)》2011,26(Z1):98-104

 为筛选出适应丽江地区烤烟种植区优质、适产、抗病性强的新品种,在2009～2010年于丽江市永胜县开展了以云烟87为对照,XYN87,云烟113,云烟114,云烟115,T29共5个新品种的区域试验。进行了生物学性状、抗病性、经济性状等观测分析。结果表明：在5个供试品种中,T29的经济性状最好,产量为3256.35kg/hm2;在抗病性上云烟113最优,白粉病病株率3.75%为最低;从化学成分上看,云烟115与T29的糖碱比分别为10.78和9.31,化学成分最协调。两年的适应性研究结果的主成分分析法综合成分得分T29为1.07674,表现最佳。  相似文献   

小麦栽培管理动态知识模型的构建与检验   总被引：5，自引：1，他引：5  

朱艳  曹卫星  姚霞  田永超  戴廷波  邹忠 《中国农业科学》2005,38(2):283-289

 将系统分析方法和数学建模技术应用于小麦管理知识表达体系，通过解析和提炼小麦生育及管理指标与环境因子及生产水平之间的基础性关系和定量化算法，创建了小麦管理动态知识模型WheatKnow；充分利用软构件的技术特点，在Visual C++和Visual Basic平台上研制了数字化和组件化小麦管理动态知识模型系统，实现了播前栽培方案的设计和产中适宜调控指标动态的预测2大功能。其中，播前栽培方案包括产量目标、适宜品种、播期、基本苗及播种量、肥料运筹和水分管理；产中调控指标包括适宜生育期、穗分化进程、生长指标、源库指标和营养指标动态。利用不同生态点、不同品种、不同土壤等资料及大田对比试验对所建知识模型进行实例分析和检验的结果表明，所提出的小麦管理动态知识模型总体上具有较好的广适性和决策性。本研究克服了传统作物栽培模式与专家系统地域性强和广适性弱的不足，从而为实现作物栽培管理的精确化和数字化奠定了基础。  相似文献   

ICP-AES法测定镧铈镨钕富集物中各稀土元素的研究     

胡堪东  姚南红 《江西农业学报》2007,19(12):76-76,79

采用ICP-AES法,利用仪器定量分析程序中的峰值方式及轮廓扫描方式,对镧铈镨钕富集物中稀土主要成分及低含量稀土元素的测定进行了研究。结果表明,射频功率、载气流量、观测高度和进样浓度分别以1.0 kW、1.0 L/m in、15 mm和1.0 mg/mL为最佳。回收实验结果表明,各元素回收率为90%~110%,RSD值小于10%,测定下限小于0.010%。  相似文献   

有机锰与有机铬对肉鸡生长性能、屠体性状及脂质代谢的影响   总被引：2，自引：0，他引：2  

乔富强  姚华  李宏全  王俊东 《北京农学院学报》2007,22(1):32-38

选用1日龄健康艾维茵肉仔鸡360只,随机分为9组,采用3×3(铬×锰)2因子3水平重复交叉试验设计,在玉米-豆粕型日粮基础上补充不同水平有机锰(以锰计:0,60,120 mg/kg)与有机铬(以铬计:0,400,600μg/kg),以饲喂基础日粮组为对照组,研究锰与铬2种微量元素对肉鸡生长性能、屠体性状以及3,5,7周末血清中总胆固醇(TC)、总甘油三酯(TG)、葡萄糖(Glu)、总蛋白(TP)、总氨基酸(TAA)及尿素氮(BUN)等脂质代谢指标动态变化的影响,初步探讨二者的互作效应。结果表明:添加锰、铬及其互作对肉鸡生长性能及屠体性状影响不显著;添加120 mg/kg锰或400μg/kg铬或二者互作对各阶段肉鸡脂肪代谢指标均表现显著互作效应(P<0.05或P<0.01),有显著降低肉鸡脂肪沉积的趋势;锰与铬互作显著改善蛋白质代谢(P<0.05或P<0.01)。  相似文献   

桂花切花品种筛选     

周媛  姚崇怀  王彩云 《浙江林学院学报》2006,23(6):660-663

对17个桂花Osmanthus fragrans品种的小花花冠径、着花繁密程度、花色、花香程度、花枝形态等特点进行调查研究。选择生长正常的健康植株采样,其中繁殖器官样本数为10,营养器官样本数为20。根据切花分级标准与桂花的观赏特点初步提出了桂花切花品种筛选的分类标准,对供试桂花品种进行观赏价值的综合评判。结果表明:厚瓣金桂‘HoubanJingui’,柳叶金桂‘Liuye Jingui’,金桂‘Jingui’等为色、香、形俱佳的一级切花品种,大花金桂‘Dahua Jingui’,硬叶金桂‘Yingye Jingui’,丹桂‘Dangui’等为二级切花品种,早金桂‘Zao Jingui’,白碧金桂‘Baibi Jingui’,橙黄金桂‘Chenghuang Jingui’等为三级切花品种,而大叶金桂‘Daye Jingui’与四季桂‘Sijigui’不适宜作为切花品种。表4参12  相似文献   

纽荷尔脐橙贮藏枯水相关ESTs分离与初步分析     

许兰珍  刘小丰  何永睿  姚利晓  彭爱红  雷天刚  陈善春 《园艺学报》2011,38(6):1153-1160

 为分析柑橘果实贮藏过程中枯水相关特异基因的表达情况,以纽荷尔脐橙（Citrus Sinensis Osbeck）采摘后贮藏至略见枯水果实的果肉为测验方（Tester）,以刚采摘果实的果肉为驱动方（Driver）,采用抑制性差减杂交（Suppression Subtractive Hybridization,SSH）技术成功构建了贮藏果实差减cDNA文库,共获得656个阳性克隆。随机挑取克隆进行菌液PCR分析,插入片段长度主要集中在100 ~ 1 000 bp。成功对213个克隆进行测序,获得有效序列143条,经序列分析,共得到53条uniESTs序列。在NCBI基因库中对这53个uniESTs进行BLAST分析,比对结果参照MIPS的分类标准,按功能分为14类,其中参与代谢、能量及蛋白合成的ESTs最多,分别占到了全部ESTs的17%、11%和13%。  相似文献   

Effect of prostate-specific membrane antigen on phospho-ERK,growth and migration of prostate cancer LNCaP cells     

GUO Zheng-hui  HUANG Hai  DU Tao  XU Ke-wei  CAO Yi  CHEN Jie-qing  DONG Wen  YAO You-sheng  LIN Tian-xin  XIE Wen-lian  JIANG Chun  HAN Jin-li  HUANG Jian 《园艺学报》2011,27(6):1090-1096

AIM: To study the expression of prostate-specific membrane antigen (PSMA) on the level of phospho-ERK, cell growth and migration of prostate cancer LNCaP cells.METHODS: The method of silencing PSMA was established by lentivirus-mediated RNAi in our early experiment. The cells were divided into 3 groups.In experimental group, the expression of PSMA in LNCaP cells was stably blocked by lentivirus-mediated RNAi. In negative control group, the cells were transfected with lentivirus-mediated control RNAi (without any interference to PSMA).The normal LNCaP cells served as blank control. The cells in these 3 groups were cultured in both 2 environments: normal medium and medium with PD98059 (an inhibitor of ERK phosphorylation). The phospho-ERK was detected by Western blotting and immunocytochemistry. Furthermore, the growth and migration of the cells were evaluated by MTT and transwell assays,respectively.RESULTS: In normal medium, the expression of phospho-ERK was attenuated in experimental group (P<0.05) and the quantity of "positive" cells was less than those in other 2 groups (P<0.05). Furthermore, the growth curves of the cells showed that the growth ability in experimental group was significantly decreased (P<0.05, after 48 h) and the migration ability in experimental group was reduced (P<0.05). In the inhibitory medium, the cells in all 3 groups expressed phospho-ERK at a lower level. Moreover, the abilities of growth and migration in these 3 groups were poorly displayed. These inhibitory effects on phosphorylation of ERK were similar to the cells in experimental group cultured in normal medium.CONCLUSION: PSMA may play a role in up-regulation of phospho-ERK and it may take an advantage in growth and migration of prostate cancer LNCaP cells.  相似文献   

Endogenous hydrogen sulfide regulates oxidant/antioxidant balance in rat with chronic obstructive pulmonary disease     

HE Yan-jing  CHEN Ya-hong  QI Yong-fen  YAO Wan-zhen  BI Xiao-rui  GUAN Yu-hong  ZHU Rui-xia  TANG Chao-shu 《园艺学报》2011,27(6):1169-1175

AIM: To investigate the role of hydrogen sulfide (H₂S) in the protection against oxidative stress in rats with chronic obstructive pulmonary disease (COPD).METHODS: The rat model of COPD was established by cigarette smoking (CS) combined with lipopolysaccharide (LPS) instillation. Thirty-two healthy male Sprague-Dawley rats were randomly divided into 4 groups: control group, CS+LPS group, CS+LPS+NaHS (H₂S donor) group and CS+LPS+PPG (DL-propargylglycine, an inhibitor of cystathionine-γ-lyase) group. After 30 days, the lung functions of the rats were measured, the histological changes of lungs were observed under light microscope and the pathological scores were calculated. The H₂S level in plasma and the protein expression of cystathionine-γ-lyase (CSE) in the lung tissues were measured. The content of malondialdehyde (MDA), the activity of superoxide dismutase (SOD) and catalase (CAT) were detected to reflect oxidative stress.RESULTS: Compared with control group, the peak expiratory flow (PEF) decreased by 24% and intra-pressure (IP) increased by 66% in CS+LPS group. The pathological scores of the lung tissues also increased. Compared with CS+LPS group, no change in the lung function was observed after given NaHS or PPG, but the pathological scores decreased in CS+ LPS+ NaHS group. Compared with control group, the content of H₂S in plasma was increased by 26% on day 16. Compared with CS+LPS group, the content of H₂S in plasma of CS+LPS+PPG group was decreased by 22% after 30 days. Compared with control group, the protein expression of CSE increased, and no statistical difference among CS+LPS group, CS+ LPS+ NaHS group and CS+LPS+PPG group was observed. Compared with control group, MDA content in the lung tissues was increased by 24% in CS+LPS group, the activity of SOD was increased by 47% and the activity of CAT was increased by 52%. Compared with CS+LPS group, the MDA content in CS+LPS+NaHS group was decreased by 21%, and no statistical difference in the activity of SOD and CAT was observed. The activity of SOD decreased by 33% after given PPG.CONCLUSION: H₂S plays a role as anti-oxidant in the rats with COPD. The CSE/ H₂S pathway may be involved in the development of COPD.  相似文献   

大白菜新品种石育秋宝的选育     

袁瑞江  王丽乔  安进军  张麦收  姚银娟  尤秀娜 《中国蔬菜》2011,1(18):87-89

石育秋宝是由两个自交不亲和系88-11-1和87-10-1配制而成的大白菜一代杂种。生长期88 d（天）左右,叶球直筒束心型（个别顶部尖）,株高59～61 cm,开展度63 cm,叶球纵径52～54 cm,横径12～14 cm。丰产性好,每667 m2净菜产量6 000～7 000 kg。品质优,结球紧实,纤维少,口感好,耐贮藏,不易抽薹|高抗病毒病和黑腐病,抗霜霉病。适宜在北京、天津、河北、辽宁、黑龙江、山东等地作秋季中晚熟大白菜种植。  相似文献