外加剂混凝土耐久性的试验研究     

刘淑萍 《森林工程》2002,18(2):36-38

本文针对掺加不同外加剂的混凝土的含气量、抗冻性能、抗压强度、抗折强度等方面的试验研究，提出掺入外加剂是提高水泥混凝土路面耐久性的必要措施。  相似文献   

野生盾叶秋海棠引种驯化及应用研究   总被引：2，自引：0，他引：2  

黄红春  徐红林 《林业调查规划》2003,28(4):56-58

1997～2001年，采集西畴、麻栗坡野生盾叶秋海棠，引种至昆明市植物园温室区，通过物候观察，繁殖，生态适应性试验，证明引种的盾叶秋海棠生长健壮，正常开花结实，繁殖后代，可用于室内观赏或作为林下地被。  相似文献   

云南CDM林业固C项目的可行性研究   总被引：2，自引：0，他引：2  

李江  雷玮  陈宏伟  冯弦  周云  孟梦  刘永刚 《西部林业科学》2004,33(4):45-49

通过对《联合国气候变化的框架公约》和《京都议定书》中一些与林业相关的条款及CDM林业固C项目作了简要介绍，结合云南的具体情况，对CDM林业固C项目在云南开展的可行性作了分析。结果如下：云南有开展林业CDM项目的良好条件，可促进生态效益补偿制度的建立，将有力促进云南省林业发展与生态建设；建议开展云南林业的固C效益与固C潜力，固C造林技术与模式，国际认可的林业CDM项目技术、程序与方法等研究。应积极实施林业CDM项目试点，开展国际合作，培养相关人材，通过国家相关部门积极申报林业CDM固C项目。  相似文献   

Therapeutic antibodies: their mechanisms of action and the pathological findings they induce in toxicity studies     

Masami Suzuki  Chie Kato  Atsuhiko Kato 《Journal of toxicologic pathology》2015,28(3):133-139

Antibodies can swiftly provide therapeutics to target disease-related molecules discovered in genomic research. Antibody engineering techniques have been actively developed and these technological innovations have intensified the development of therapeutic antibodies. From the mid-1990’s, a series of therapeutic antibodies were launched that are now being used in clinic. The disease areas that therapeutic antibodies can target have subsequently expanded, and antibodies are currently utilized as pharmaceuticals for cancer, inflammatory disease, organ transplantation, cardiovascular disease, infection, respiratory disease, ophthalmologic disease, and so on. This paper briefly describes the modes of action of therapeutic antibodies. Several non-clinical study results of the pathological changes induced by therapeutic antibodies are also presented to aid the future assessment of the toxic potential of an antibody developed as a therapeutic.  相似文献   

中日两国地区旅游形象设计比较研究及其对我国的启示     

陈友华 《绿色科技》2015,(2):280-285

指出了地区旅游形象设计不仅仅有助于宣传当地旅游形象,而且有助于扩大本地的知名度,增进人们对本地的好感。为此,很多国家和地区都非常重视旅游形象的设计。从中国和日本的情况来看,由于传统文化思想、审美能力、设计人员的阅历和艺术创造观等诸多方面的差异,使得两国在旅游形象主题词、形象Logo和宣传口号的设计方面出现了不同的特色。针对两国已经公布的地区旅游形象设计进行了深入地剖析与阐述。通过比较研究,有助于两方取长补短,提高旅游形象设计水平,从而更好地开展宣传和扩大相关地区的知名度。  相似文献   

Induction of resistance against downy mildew pathogen in pearl millet by a synthetic jasmonate analogon     

Shantharaj Deepak  Sathyanarayana Niranjan-Raj  Shekar Shailasree  Ramachandra K. Kini  Wilhelm Boland  Hunthrike S. Shetty  Axel Mithfer 《Physiological and Molecular Plant Pathology》2007,71(1-3):96-105

The synthetic 1-oxo-indanoyl-l-isoleucine methyl ester (Ind-Ile-Me) represents a highly active mimic of octadecanoic phytohormones, which are involved in plant defenses against pathogens and pests. Seed treatments and foliar spray with Ind-Ile-Me were tested for induced resistance against downy mildew disease caused by the phytopathogenic oomycete Sclerospora graminicola in pearl millet (Pennisetum glaucum) under greenhouse and field conditions. Under greenhouse conditions, a 50% protection level was achieved after seed treatment. Seed treatment in combination with foliar spray resulted in 60% protection. The induction of resistance was correlated with the enhanced activities of defense-related proteins such as phenylalanine-ammonia-lyase, peroxidase, and enhanced level of hydroxyproline-rich glycoproteins. Under field conditions, a maximum protection of 62% was recorded upon seed treatment along with foliar spray. Hence, it infers that Ind-Ile-Me can be used as a valuable protection compound at least in downy mildew disease management.  相似文献   

谷子抽穗时间基因SiTOC1的表达与单倍型变异分析     

张林林  智慧  汤沙  张仁梁  张伟  贾冠清  刁现民 《中国农业科学》2021,54(11):2273-2286

【目的】谷子抽穗时间的适应性表现是广适性新品种选育的基础,分析抽穗时间关键基因的遗传变异和单倍型效应,为品种适应性改良提供基础信息。【方法】通过全基因组关联分析（genome-wide association study,GWAS）,定位谷子抽穗时间关键基因SiTOC1,利用多组学数据库（multi-omics database for Setaria italica,MDSi）提供的SiTOC1数字表达量,分析SiTOC1的组织时空表达特性,并利用原生质体对SiTOC1蛋白进行亚细胞定位。采用qRT-PCR在短日（10 h光照/14 h黑暗）条件下进行SiTOC1 24 h节律表达模式分析。利用有代表性的99份谷子品种,分析SiTOC1编码区和启动子区的遗传多态性、单倍型以及转录水平,并对单倍型与抽穗时间的关系进行鉴定。【结果】在第1染色体物理位置31 456 761 bp处鉴定到了一个显著的关联信号,与抽穗时间紧密相关,该位点附近存在一个拟南芥抽穗期TOC1的同源基因SiTOC1。SiTOC1在光周期响应组织（根、茎、叶等）中高表达,亚细胞定位于细胞核,在傍晚表达量上调,呈现出24 h节律性表达模式。SiTOC1在不同谷子品种中存在丰富的多态性,但REC和CCT结构域高度保守。SiTOC1编码区2种主要单倍型H-2和H-6分别与启动子单倍型Hp-591C和Hp-591A共分离,其中,启动子单倍型Hp-591C较Hp-591A的相对表达量显著上调了约2.5倍（P=0.014）,并且该单倍型在三亚市、长治市和乌鲁木齐市3个环境下的抽穗时间分别平均延迟9、11和12 d。【结论】SiTOC1启动子区第591 bp处的SNP是引起抽穗时间差异的主效位点,单倍型Hp-591A较Hp-591C早熟,可作为主效单倍型用于分子育种选择。  相似文献   

抽排厕所废物原位发酵回用可行性研究：杭桥村案例          下载免费PDF全文

吕明环  张玉  徐明杰  李傲  李亚惠  朱仕坤  范彬 《农业资源与环境学报》2022,39(2):220-229

为适应农村居民对现代化生活的追求、顺应可持续发展的趋势,本研究结合我国农村实情提出以“抽吸式-源分离-就地就近资源化”为技术路线的现代资源化模式作为农村家庭粪尿处置与利用的解决方案,选取一自然聚落,建设服务于20户居民的示范工程开展可行性研究。方案采用组合式多级厌氧发酵制肥工艺对单独收集的抽排厕所废物进行无害化处理,就地就近回用于附近农田,考察抽排厕所废物性质,对制肥设施进行定期监测,并于运行32个月后破拆清扫、取样分析。结果显示：设施未出现堵塞、满溢及渗漏现象,污泥积累不超过设施总有效高度的20%且充分稳定,具有维护简单、清扫周期长的特点;设施出液及底泥均未检出活寄生虫卵,粪大肠菌值>10^-4,符合《粪便无害化卫生要求》（GB 7959—2012）中的卫生标准;设施出液及底泥的总养分含量分别为0.18%和0.43%,有机质含量分别为0.05%和2.65%,每年产生的出液及污泥共计可取代氮肥（N）161.19 kg、磷肥（P₂O₅）9.67 kg、钾肥（K₂O）42.11 kg。现代资源化模式的成功运用不仅可以提高居民生活水平,还能满足可持续发展要求,降低家庭废物处理成本的同时,实现资源就地回用,具有较高的工程应用和推广价值。  相似文献   

Effect of simulated transport stress on the rat small intestine: A morphological and gene expression study   总被引：2，自引：0，他引：2  

Changrong Wan  Peng Yin  Xiaolong Xu  Mingjiang Liu  Shasha He  Shixiu Song  Fenghua Liu  Jianqin Xu 《Research in veterinary science》2014

The present study investigated the effects of simulated transport stress on morphology and gene expression in the small intestine of laboratory rats. Sprague Dawley rats were subjected to 35 °C and 0.1×g on a constant temperature shaker for physiological, biochemical, morphological and microarray analysis before and after treatment. The treatment induced obvious stress responses with significant decreases in body weight (P < 0.01), increases in rectal temperature, serum corticosterone (CORT), serum glucose (GLU), creatine kinase (CK) and lactate dehydrogenase (LDH) levels (P < 0.01), as well as expression of Hsp27/70/90 mRNA (P < 0.05; P < 0.01). The rat jejunum was severely damaged and apoptotic after mimicking transport stress, which may mainly be related to cell death, oxidation reduction and hormone imbalance determined by microarray analysis. The bioinformatics analysis from the present study would provide insight into the potential mechanisms underlying transport stress-induced injury in the rat small intestine.  相似文献   

Orexin and orexin receptor like peptides in the gastroenteric tract of Gallus domesticus: An immunohistochemical survey on presence and distribution     

N. Arcamone  L. D’Angelo  P. de Girolamo  C. Lucini  A. Pelagalli  L. Castaldo 《Research in veterinary science》2014

This study reports the immunohistochemical localization and distribution of orexin A and B-like and their receptors-like peptides in the gastroenteric tract of chicken. The immunoreactivity is distributed in endocrine cells, nerve fibers and neurons, both in the stomach and intestine, and shows a discrete conformity with the data till now reported for Mammals. Our study suggests a possible participation of orexin-like peptides in the modulation of chicken gastroenteric activities and the preservation of their main distribution compared to Mammals. Western blot analysis has confirmed the presence of prepro-orexin and both receptors in the examined tissues.  相似文献