扎龙保护区圈养亚成体丹顶鹤越冬期行为的研究     

周少婷  李淑玲  马建华  王文锋 《动物医学进展》2016,(12):66-72

为了解扎龙保护区圈养群体亚成体丹顶鹤越冬期越冬行为策略,于2014年11月至2015年3月采用目标取样法和瞬时记录法对圈养2013年和2014年亚成体丹顶鹤进行研究。结果表明,圈养亚成体丹顶鹤越冬期主要以取食行为为主(34.14%),其次为站立行为(15.77%);双因素方差分析显示,温度对越冬期各行为均有显著影响,年龄仅对玩耍行为有显著影响,Pearson相关性分析,温度与取食和游走行为显著正相关,与站立和静栖显著负相关,年龄与玩耍行为显著正相关。表明圈养亚成体丹顶鹤越冬期温度升高时取食和运动,温度降低时站立和静栖,2岁龄亚成体丹顶鹤相较于1岁龄更喜欢玩耍。  相似文献   

Improvement of an enzyme-linked immunosorbent assay for equine herpesvirus type 4 by using a synthetic-peptide 24-mer repeat sequence of glycoprotein G as an antigen     

Hiroshi BANNAI  Manabu NEMOTO  Koji TSUJIMURA  Takashi YAMANAKA  Ken MAEDA  Takashi KONDO 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2016,78(2):309-311

To increase the sensitivity of an enzyme-linked immunosorbent assay (ELISA) for equine herpesvirus type 4 (EHV-4) that uses a 12-mer peptide of glycoprotein G (gG4-12-mer: MKNNPIYSEGSL) [4], we used a longer peptide consisting of a 24-mer repeat sequence (gG4-24-mer: MKNNPIYSEGSLMLNVQHDDSIHT) as an antigen. Sera of horses experimentally infected with EHV-4 reacted much more strongly to the gG4-24-mer peptide than to the gG4-12-mer peptide. We used peptide ELISAs to test paired sera from horses naturally infected with EHV-4 (n=40). gG4-24-mer ELISA detected 37 positive samples (92.5%), whereas gG4-12-mer ELISA detected only 28 (70.0%). gG4-24-mer ELISA was much more sensitive than gG4-12-mer ELISA.  相似文献   

抗青枯病番茄砧木品种宝砧6号的选育     

李玉洪  李业勇  吴永琼  滕献有  莫豪葵  李刚 《长江蔬菜》2016,(22):43-45

宝砧6号是以自交系Y0609-4-6为母本,自交系T0802-7-4为父本配置而成的番茄砧木一代杂交种。该品种为无限生长型,生长旺盛,茎秆粗壮,株型紧凑,高抗青枯病;与生产上主栽品种嫁接亲和性好,对果实品质、商品性无不良影响,作砧木嫁接栽培抗青枯病和抗早衰能力效果明显,嫁接种植田后期可延长采收15~20 d,增产幅度超过15%。目前该品种已成为资源车田、永福三皇等番茄产业基地嫁接砧木的主要应用品种,推广应用面积达400 hm~2。  相似文献   

MiPDCD6 effector suppresses host PAMP-triggered immunity to facilitate Meloidogyne incognita parasitism in tomato     

Md Kamaruzzaman  Li-Feng Zhao  Jin-Ai Zhang  Le-Tian Zhu  Yuan Li  Xiao-Da Deng  Shu-Jing Cai  Xiao-Cong Lian  Fang-Ni Chen  Ning Jia  Xinrong Wang 《Plant pathology》2023,72(1):195-206

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Tumour necrosis factor stimulated gene 6 intrinsically regulates PD-L1 expressions in breast cancer cells,leading to modulation of tumour microenvironment     

Jeong-Hwa Lee  Ju-Hyun An  Hwa-Young Youn 《Veterinary and comparative oncology》2023,21(2):255-269

Recent studies have shown that tumour cells express tumour necrosis factor-inducible gene 6 (TSG-6) and its protein, which is known to play a key role in regulating excessive immune responses and proliferation and growth of mesenchymal stem cells (MSCs). It has not been confirmed whether the inhibition of TSG-6 for tumour cells can suppress tumour cell growth and regulate the activation of immune cells in the tumour microenvironment (TME). TSG-6-specific small interfering RNA was transfected into canine and human breast cancer cells (CIPp, CIPm and BT-20). TSG-6-down-regulated (siTSG-6) cells showed decreased cell proliferation, migration, and invasion abilities. Decreased mRNA expressions of NF-κB, STAT3 and Sox2, confirming that TSG-6 is an upper factor governing tumour growth and metastasis. Notably, siTSG-6 cells showed significantly decreased expression levels of CD44 and PD-L1. Direct and indirect co-culture of canine peripheral blood mononuclear cells (cPBMCs) and the siTSG-6 cells showed significant activation in M1 type macrophages and cytotoxic T cells. They also showed a tendency to decrease in the expression of CTLA-4 and increase in the expression of PD-1. In conclusion, this study suggests that the down-regulation of TSG-6 in breast cancer cells could not only suppress tumour growth and metastasis, and but also regulate TME. Since modulation of immune checkpoint proteins occurs in both tumour cells and immune cells, inhibiting TSG-6 and its protein within the TME could be novel therapeutic target for anticancer treatment.  相似文献   

Antioxidant,anti-amylase and anti-glycation potential of brans of some Sri Lankan traditional and improved rice (Oryza sativa L.) varieties     

《Journal of Cereal Science》2014,59(3):451-456

Brans of 23 traditional and 12 improved (both red and white) rice varieties in Sri Lanka were screened for anti-amylase and anti-glycation activities in vitro. Varieties which showed the highest inhibitory activities at screening were further investigated for anti-glucosidase and glycation reversing as anti-diabetic properties. The same varieties were studied for selected antioxidant properties. Significantly high anti-amylase and anti-glycation activities were observed for bran extracts of red varieties compared to white varieties at screening. Traditional red rice varieties, Masuran, Sudu Heeneti, Dik Wee and Goda Heeneti, exhibited significant and dose dependent anti-amylase, anti-glycation and glycation reversing activities. These varieties also showed marked antioxidant properties. It is concluded that brans of Sri Lankan traditional red rice varieties Masuran, Sudu Heeneti, Dik Wee and Goda Heeneti may be potential food supplements for diabetes.  相似文献   

THE REIMPROVEMENT FOR IMPULSE OF G. I. TAYLOR THEORY OF PLASTIC DEFORMATION IN IMPACT OF CYL1NDICAL PROJECTILES     

Liu Xiangchen Li Zeqiang 《保鲜与加工》1991,(5):109-115

In this paper the reimprovement for G. I. Taylor theory of plastic deformation in impact of cylindical projectiles is done. The impulse in the reimproved theory is G. I. Taylor' s 1/2, and 3/4 of G. I. Taylor' s improved theory. The analytical solution of the reimproved theory shows that it gives better agreement with exprimental results than those of the original Taylor' s theory and, the improved theory.  相似文献   

一般6R机器人的高精度逆运动学优化算法   总被引：3，自引：0，他引：3  

刘松国  朱世强  王宣银  程永伦 《农业机械学报》2007,38(11):118-122

为提高一般6R机器人逆运动学算法的精度和效率,提出一种基于符号运算和矩阵分解的优化算法。对6个基础逆运动学方程作变换,采用符号运算预处理得到14个逆运动学方程,避免大量浮点数计算累积误差。利用其中6个方程与关节变量3无关的特点,将目标矩阵从24阶降低到16阶,包含的关节变量从3个增加到4个。把一元16次方程求根问题转换为矩阵特征分解问题,并选取较高数量级的相关数据元素计算关节变量,进一步提高了算法精度。以一般6R机器人为例,求解结果表明,提出的算法能够得到具有任意期望精度的最多16组实数逆运动学解。  相似文献   

Synthesis and Anthelmintic Activity of 7-Hydroxy- 5-oxo-5H-thieno[3,2-b]pyran-6-carboxanilides and -6-thiocarboxanilides     

Andrew Plant  Achim Harder  Norbert Mencke  Heinz-Jürgen Bertram 《Pest management science》1996,48(4):351-358

7-Hydroxy-5-oxo-5H-thieno[3,2-b]pyran-6-carboxanilides and -6-thio-carboxanilides represent a novel series of anthelmintic compounds, with broad-spectrum activity against important parasitic nematodes in sheep and dogs. In particular, an improved efficacy against Trichostrongylus colubriformis in sheep over the related 3-carbamoyl-4-hydroxycoumarins has been noted. New synthetic routes to the key intermediate, 7-hydroxythieno[3,2-b]pyran-5-one, have been developed.  相似文献   

系统引用外部应用程序的对象库     

温雪岩  朱泳 《东北林业大学学报》2006,34(3):115-118

以Visual Basic 6．0这种高级语言开发多要素系统为例,主要介绍在处理具有相关性的各要素组成多要素系统时需要注意的问题及其解决方法,同时阐述了系统相关ActiveX控件的调用及其使用方法。此外,本多要素系统也实现了外部应用程序Microsoft Office对象库Access 2000的引用,同时完成与本多要素系统相关的程序代码。  相似文献