塑料薄膜覆盖晾晒亚麻技术初步研究与应用     

王国会  王宏  赵洪敏  任方宏  王延涛  王世有  冯峰 《中国麻业科学》2005,27(4):190-192

本文研究分析了塑料薄膜覆盖晾晒亚麻技术的效应原理;较详细地介绍了主要技术措施;阐述了该技术在当地的应用情况.本项技术对亚麻生产具有一定的积极意义.  相似文献   

农业经济可持续发展初探     

任福荣 《北方水稻》2005,(1):53-55

随着经济全球化和知识经济时代的来临,人类对农业生产的认识在不断提高和深化,农业经济可持续发展已成为当今世界的热点问题。本文运用可持续发展和复合生态系统理论,采用生态学和经济学的基本原理和方法,立足农业资源条件及所存在的问题,围绕农业经济可持续发展这一主题,探讨持续农业发展的方向、途径和具体对策。  相似文献   

家蚕18项血液生理生化性状的杂种优势分析   总被引：1，自引：0，他引：1  

任玫  华卫建 《蚕业科学》2003,29(4):417-420

测定了家蚕 3对现行品种及其杂交种的 18项血液生理生化指标 ,计算其杂种优势指数。发现 13项指标呈正负超亲优势 ,其中 :葡萄糖含量有较高的正超亲优势 ;钙、无机磷及球蛋白含量与乳酸脱氢酶活性基本没有杂种优势 ;谷丙转氨酶等 8项性状表现正杂种优势的趋势较强 ;尿酸等 4项性状则表现负超亲优势的趋势较强。按代谢类型分 :蛋白质代谢相关的 9项性状中呈现正负超亲优势的有 5～ 8项 ,占 5 5 .6 %～ 88.9% ;能量代谢相关的 6项中有 2～ 5项 ,占 33.3%～ 83.3% ;脂代谢相关的 2项中有 1项呈负超亲优势 ,占 5 0 %。表明家蚕经济性状广泛的杂种优势有其普遍的生理生化基础  相似文献   

金花菜新品种‘淮扬金花菜’     

魏臻武  任海龙  武自念  刘国志  陈祥  乔志宏 《园艺学报》2015,42(11):2335-2336

‘淮扬金花菜'是通过对江苏扬州、镇江等地种质资源调查并搜集整理,经多年筛选出的新品种,具有蛋白质含量高、品质好、产量高、再生性好、抗逆性强,综合性状优良的特点。粗蛋白含量29.41%,粗灰分含量7.94%,中性洗涤纤维含量21.71%,酸性洗涤纤维含量10.29%,适宜多次刈割,鲜草产量30 000 kg·hm~(-2)以上,适宜在长江中下游地区保护地或露地秋季种植。  相似文献   

Down-regulated BARF1 expression induces EBV-positive gastric carcinoma cell apoptosis via activating caspase-dependent mitochondrial pathway     

LIU Jun  ZHANG Xue-lin  REN Yong-sheng  ZHENG Xin 《园艺学报》2015,31(11):1970-1978

AIM: To investigate the effects of BARF1 down-regulation on EBV-positive gastric carcinoma cell apoptosis, and the molecular mechanisms by BARF1 silencing-mediated apoptosis. METHODS: After NUGC3 and SNU719 cells were transfected with NCsiRNA and siRNA, respectively, the protein levels of BARF1, Bcl-2, Bax, cytochrome C, caspase 3 and capase 9 were detected by Western blot, and the mRNA expression of BARF1, Bcl-2 and Bax was determined by RT-PCR. The cell viability was measured by the method of Trypan blue exclusion and the cell apoptosis was analyzed by flow cytometry analysis with Annexin V-FITC/PI staining. The expression of the apoptosis-related proteins in the cells transfected with siRNA and NCsiRNA was examined by human apoptosis antibody arrays. Mitochondrial membrane potential was determined by flow cytometry. The interaction between Apaf-1 and caspase 9 was confirmed by immunoprecipitation. RESULTS: Compared with untreated and NCsiRNA groups, BARF1 gene silencing significantly inhibited the cell viability, induced apoptosis, and reduced the mitochondrial membrane potential in the NUGC3 and SNU719 cells transfected with siRNA. BARF1 gene silencing up-regulated the expression of pro-apoptotic proteins and down-regulated the expression of anti-apoptotic proteins, and the Bcl-2/Bax ratio was significantly decreased. In BARF1 gene silencing cells, the caspase inhibitor z-VAD-fmk inhibited BARF1 silencing-mediated apoptosis, and significantly increased the levels of cleaved caspase 3 and caspase 9. The concentration of cytochrome C significantly increased as compared with NCsiRNA group, and Apaf-1 interacted with caspase 9 in the cytoplasm. CONCLUSION: BARF1 silencing induces apoptosis via the mitochondrial pathway through regulating the expression of Bcl-2 and Bax proteins in a caspase-dependent manner in the NUGC3 and SNU719 cells.  相似文献   

蔬菜根结线虫生防细菌的筛选及菌株HJT2-1种类的初步鉴定   总被引：1，自引：0，他引：1  

霍建飞  任文来  郝永娟  刘春艳  王勇  王万立 《北方园艺》2015,(8):120-123

以天津地区7个区县的蔬菜大棚土壤中分离出的306株细菌菌株为试材,采用亚甲基蓝染色法,研究306株细菌菌株发酵液对南方根结线虫2龄幼虫的影响。结果表明:细菌菌株HJT2-1发酵液对南方根结线虫2龄幼虫的校正死亡率较高为81.3%,其温室盆栽防效为55.6%,略低于阿维菌素防效。采用对细菌核糖体DNA的内转录间隔区进行分析的方法将菌株HJT2-1初步鉴定为假单胞菌属细菌。该试验获得了对根结线虫2龄幼虫具有较高致死率的细菌菌株HJT2-1,为开发防治根结线虫的生防制剂奠定了基础。  相似文献   

盐胁迫条件下甜高梁幼苗的光合特性及光系统Ⅱ功能调节   总被引：7，自引：1，他引：7  

葛江丽 石雷谷卫彬  唐宇丹张金政姜闯道  任大明 《作物学报》2007,33(8):1272-1278

通过气体交换和叶绿素荧光猝灭动力学研究了盐胁迫对甜高粱幼苗碳同化能力和光系统Ⅱ光化学效率的影响。结果表明，50和100mmol L^-1的盐（NaO）处理对叶绿素含量、相对含水量和膜质过氧化程度影响很小；200mmol L^-1 NaCl处理导致叶绿素含量和相对含水量明显下降、膜质过氧化程度增加。50mmol L^-1 NaCl处理未影响甜高粱幼苗的净光合速率；NaCl浓度大于50mmol L^-1时，净光合速率开始迅速降低；同时，气孔限制值（Ls）也减小；而且，光合能力的下降未能通过增加CO2浓度得以恢复。甜高粱幼苗的初始荧光（Fo）、最大荧光产量（Fm）和最大光化学效率（Fv/Fm）只在200mmol L^-1 NaCl处理时有较大程度的下降。此外，50mmol L^-1 NaCl胁迫也没有影响甜高粱幼苗的荧光猝灭动力学参数；当NaCl浓度大于50mmol L^-1时，光系统Ⅱ开放反应中心转化效率（Fv，F’m），光化学猝灭系数（qp）和光系统Ⅱ实际光化学效率（ΦPSⅡ）开始下降，而非光化学猝灭（NPQ）提高。因此认为，盐胁迫导致的碳同化能力的降低属于非气孔限制；碳同化能力的降低改变了甜高粱光系统Ⅱ的激发能利用和分配。100mmol L^-1盐胁迫条件下，甜高粱幼苗主要通过增加热耗散来消耗过多的激发能，而200mmol L^-1盐胁迫条件下通过减少光能吸收和增加热耗散来维持光能捕获和利用的平衡。  相似文献   

Modular Design Base on Variety Theory     

LIU Da-bin  REN Heng-bin 《保鲜与加工》2005,(7):9-11

Variety Design not only support to short down development time, and cut down development cost, but also support to response marketing rapid, is a kind of modern design theory which apply on Mass Customization. In some way, Variety Design is a kind of design that integrates standard design and modular design, and Variety Design object is high cost and universal parts that among platform. The authors discuss the modular design role and the different between integral design, promote the method and the step of modular design, so change the low cost parts design, and give an new product based on the platform. Based on this model, they not only save the cost of develop new product, but also save time, achieve advantage which Mass produce process.  相似文献   

Innovation of Construction Projects Management Based on the Five-dimension Modeling     

REN Hong  ZHAO Dong 《保鲜与加工》2006,(9):152-155

Nowadays,the computer technology is applied more and more widely in the architecture,engineering and construction industries(AEC).This paper introduces a methodology of construction project management based on the five-dimension modeling which integrates three-dimension building models,resources and schedules by the development of virtual construction technology.The application of this method also influences several aspects of project management such as range,time,cost,resource,communication and information management.Finally,the process of 5D modeling and the management practice are presented through a real life case in Beijing which proves to be a more efficient,productive and economy project.  相似文献   

1-MCP处理对桃冷藏期间品质和生理特性的影响   总被引：12，自引：1，他引：12  

于建娜  任小林  张少颖 《保鲜与加工》2003,3(2):16-18

秦王”桃采收后分别用不同浓度1-MCP处理,然后置于(0±1)℃冷库中贮藏。结果表明:1-MCP处理对贮藏期果实的硬度、可溶性固形物含量无显著影响。经处理的果实在贮后20天果皮细胞膜透性开始异常增加。10nL/L和30nL/L1-MCP处理的果实比对照提前5天出现了呼吸高峰和乙烯释放高峰;500nL/L的处理抑制了果实的呼吸作用,与对照相比大幅度降低了乙烯峰值,在相同贮藏时间多酚氧化酶(PPO)和过氧化物酶(POD)活性也显著降低(p<0.05),表明500nL/L的1-MCP处理能有效地抑制果肉褐变,延长果实贮藏时间。  相似文献