Resting behavior of a baiji Lipotes vexillifer in captivity     

Jian Yang  Kexiong Wang and  Renjun Liu 《Fisheries Science》2001,67(4):764-766

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Plasma digoxin concentration in dogs with mitral regurgitation.     

Y Nagashima  H Hirao  S Furukawa  K Hoshi  M Akahane  R Tanaka  Y Yamane 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2001,63(11):1199-1202

Fifteen and eight mature beagles, without (normal group) and with experimental mitral regurgitation (MR group), respectively, were given 0.02 mg/kg/day digoxin powder for 10 days orally. The optimum time for sample collection after administration of digoxin was observed to be 8-18 hr and 10-22 hr in the normal and MR groups, respectively. In both groups, a stable concentration was reached after 3-5 days of treatment. No differences in plasma level were observed between sexes. The optimum concentration of digoxin was attained at an earlier stage than has been previously reported for both dogs and humans.  相似文献   

Seasonal changes in serum total thyroxine, free thyroxine, and canine thyroid-stimulating hormone in clinically healthy beagles in Hokkaido.     

E Oohashi  K Yagi  Y Uzuka  S Tanabe  T Sarashina  T Ishida 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2001,63(11):1241-1243

The purpose of this study was to evaluate seasonal influences on thyroid hormone levels of healthy outdoor dogs in Hokkaido. We surveyed serum basal total thyroxine (tT4), free thyroxine (fT4), and canine thyroid-stimulating hormone (cTSH) levels, and tT4 levels after administration of TSH for a year. Basal tT4 levels decreased in January, and increased in August and September. fT4 levels increased in January and November. No significant seasonal variation was found in cTSH. tT4 levels after administration of TSH in August and November increased. These results suggested that the thyroid gland may have been activated in November. We should take seasonal variation into consideration when thyroid function is tested.  相似文献   

Fisheries for non-native species in England and Wales: angling or the environment?   总被引：3，自引：0，他引：3  

P. Hickley  & S. Chare 《Fisheries Management and Ecology》2004,11(3-4):203-212

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黄皮的生物学特性研究     

Xu Naiduan Wang Xinyan Zheng Qiwen 《仲恺农业技术学院学报》1990,(1)

通过本试验观察表明:黄皮[Clausena Lansium (Lour.)Skeels]的开花与温度有密切关系,温度高,开花过程短;温度低,开花过程长。花穗中的花轴增长速度也随温度升高而加快,花轴增长快,则花轴长,花穗大;反之,花轴增长速度慢,花轴短,花穗小。黄皮开花的顺序是从花穗基部第1—4个分枝开始,每个分枝则先从基部1—8个二次分枝首先开放。31℃是黄皮花粉萌发最适宜温度。在培养基中加入15—20％蔗糖或2.4—D,三十烷醇等生长调节物质,明显可提高黄皮花粉的萌发力。本试验对黄皮的物候期及植物学特性同时进行了研究。  相似文献   

论城中村农民的现代化改造   总被引：4，自引：0，他引：4  

王竹卿  邢媛 《农产品加工．学刊》2005,(8):62-64

针对当前我国城中村改造中存在的一些问题,以系统论为基础,对城中村改造工作的方向和改造工作应遵循的基本原则予以一定的分析,提出城中村改造工作的重点和关键所在是对城中村农民的现代化改造。进一步阐述了城中村农民的现代化改造对于推进城中村改造的重要意义。  相似文献   

微量元素相对生物学利用率的研究方法     

S.Durosoy 《中国饲料》2004,(23):18-19

有机微量元素具有多种优点,本文阐述了有关外源微量元素生物学利用率,回顾了微量元素不同添加方法的研究成果并进行比较。1影响动物对微量元素吸收的因素微量元素的吸收水平直接影响动物机体对微量元素的利用。如果饲喂量超过机体的代谢量,微量元素的吸收下降;如果饲喂量不足,机体则会提高对微量元素的吸收,这就说明机体自我平衡作用可以调节营养素的吸收。日粮总体消化率及各营养素间的相互作用均会影响矿物质吸收,这种相互作用包括协同作用(如铁和维生素C)和拮抗作用(如钙和锌,铜和钼、硫)。动物种类、品种、年龄、性别等也会影响微量元…  相似文献   

小麦品种鄂恩一号和7023生期规律的对比观察与分析     

王秀琴  刘秀峰  刘晓娜  徐庆猛 《信阳农业高等专科学校学报》1990,(1)

通过对豫南小麦当家品种鄂恩一号和种植多年的7023的对比观察,找出二者在生育规律上的差异,进而分析在栽培措施上的异同。与7023相比,鄂恩一号出叶速度快,容易形成壮苗;抽穗后绿叶保持时间较长,有利后期光合作用;年前分蘖数比例大,总分蘖及成穗数没有7023多;幼穗分化开始早,进程快,小穗数及穗粒数比较少;开花早,灌浆时间长,灌浆强度大,子粒大,千粒重高。基于这些特点,提出了十月下旬播种,三叶期、药隔形成期追肥,四分子期根外喷肥,加强后期管理等针对该品种特性的栽培措施。  相似文献   

群钻钻削精度试验     

王志安  胡仲勋 《湖南农业大学学报(自然科学版)》1996,23(4)

通过群钻钻头直径Ｄ，进给量ｆ和切削速度ｎ对孔径扩张量，圆度，孔中心线垂直度和直线度影响的试验，得出它们的变化规律。  相似文献   

Milking the golden cow--her comfort.     

S L Berry 《Journal of the American Veterinary Medical Association》2001,219(10):1382-1387

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