日本血吸虫非叉型尾蚴感染动物试验   总被引：2，自引：1，他引：1  

谢银杰  吴定宇  杨建发  孙绍美  孙秀涛  段纲  邹丰才 《中国畜牧兽医》2011,38(3):226-227

试验采集云南巍山地区自然条件下的钉螺,压碎钉螺、检获尾蚴,发现为非叉型尾蚴。将非叉型尾蚴400~850条/只经皮肤感染家兔,同时,用云南洱源的叉型尾蚴作对照试验。感染后50～55 d解剖兔子,试验组检获到日本血吸虫,荷虫量为10～15条/只。试验结果表明,云南巍山非叉型尾蚴能感染动物,该试验结果为丰富日本血吸虫的生活史提供了极有价值的补充。  相似文献   

生态型农业观光园规划设计   总被引：1，自引：0，他引：1  

赵志刚  谢小立  陈安磊  王凯荣 《北方园艺》2011,(11):199-202

通过阐述园区规划设计原则及理论根据,结合实例分析了生态型农业观光园的设计内容,有利于更好的研究与开发农业观光园项目。  相似文献   

乌冈栎地理分布与水热环境因子的关系     

谢春平  方彦  方炎明 《水土保持研究》2011,18(1):125-131

在广泛收集乌冈栎地理分布资料的基础上,利用目前常用的植被与气候相互关系的研究方法,结合温暖指数(WI)、寒冷指数(CI)、干燥度指数(K)、水热综合指数(S)、年均生物温度(BT)、可蒸散量(PET)和年均可能蒸发量率(PER),以及单一的气象因子一月均温(TM-Jan)、七月均温(TM-Jul)、最高温(TMax)、最低温(TMin)、年均温(TM-A)、年均降水量(PM)等,对乌冈栎在东亚地区的地理分布及其与气候的关系进行了研究。结果表明:乌冈栎在中国地理分布在23°-34°N、100°-120°E,日本分布在26°-37°N、128°-140°E,均属于亚热带分布。气候环境指数研究的结果表明乌冈栎各项指数平均值均较低,与亚热带分布的青冈的指数接近,因此其性质为亚热带耐寒树种。通过热量曲线的比较,反映了中日两国乌冈栎分布范围的差异。结合主成分分析可知,影响乌冈栎分布的最主要因素是温度,并将其分布区划分为5类,包括:日本区(A)、中国华东区(B)中国西南部区(C)、中国西北部区(D)和中国南部区(E)。最后建立了乌冈栎生物地理模型,对预测该物种的分布提供了科学参考依据。  相似文献   

The effect of extension and loading of the carpus on radial rotation     

Erez Bitton DVM  Rotem Joseph DVM  Diplomate ECVS  Lena Portman BSc  Gilad Segev DVM  Diplomate ECVIM‐CA  Yaron Meiner BSc ME  Anna Shipov DVM  Diplomate ECVS  Joshua Milgram BVSc  Diplomate ECVS 《Veterinary surgery : VS》2013,42(8):909-917

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Effect of Complex Vertebral Malformation on Luteal Function in Holstein Cows During Oestrous Cycle and Early Pregnancy     

ME Ghanem  T Suzuki  A Kasuga  M Nishibori 《Reproduction in domestic animals》2010,45(4):729-733

The reason why cows carrying the mutation of complex vertebral malformation (CVM) show poor reproductive capability although they carry only one mutant allele is still not fully understood. Monitoring the progesterone profiles during oestrous cycle and early pregnancy in carrier cows might help explain their lowered reproductive capability. Progesterone concentration was measured in 19 CVM carrier cows and 21 control cows during oestrous cycle and early pregnancy. Milk samples were collected from all cows starting on the day of artificial insemination until day 45 post‐AI. Progesterone was measured in skim milk using enzyme‐linked immunosorbent assay (ELISA). Progesterone concentration was significantly reduced on day 7 (p < 0.05) and day 9 (p < 0.01) post‐insemination in conceived CVM carrier cows when compared with that in control conceived cows. The mean progesterone concentration during early pregnancy was significantly lower (p < 0.05) in conceived cows with CVM than that of control cows in the same period. However, the mean progesterone concentration did not differ significantly (p = 0.072) in CVM cows that showed fertilization failure or embryonic death than that of control cows. Additionally, of 13 conceived control cows, eight cows (61.5%) showed normal luteal function. In contrast, of nine conceived CVM cows, only four cows (44.4%) showed normal luteal function. The conception rate was 47.4% in CVM carrier cows and 61.9% in control cows, but this difference did not reach significance. In conclusion, progesterone concentration might be lowered during early pregnancy in conceived CVM cows compared with that in control cows.  相似文献   

青花菜不同器官中4-甲基亚磺酰丁基硫苷及萝卜硫素含量分析   总被引：2，自引：0，他引：2  

姚雪琴  谢祝捷  李光庆  邱海荣  李媛 《中国农业科学》2011,44(4):851-858

 【目的】青花菜的抗癌功能主要与4-甲基亚磺酰丁基硫苷的降解产物萝卜硫素有关,通过测定不同青花菜材料花球、茎和叶片中两者的含量并分析两者含量间的相关性,为青花菜高营养品质育种提供理论依据。【方法】采用反相高效液相色谱法,对24个不同青花菜材料花球、茎和叶片中4-甲基亚磺酰丁基硫苷含量,及其中的10份材料花球、茎和叶片中萝卜硫素含量进行测定和分析。【结果】青花菜不同基因型间以及不同器官间4-甲基亚磺酰丁基硫苷和萝卜硫素含量差异均极显著,4-甲基亚磺酰丁基硫苷和萝卜硫素含量均为花球含量最高,其次为茎,叶片含量最低;不同材料花球中4-甲基亚磺酰丁基硫苷平均含量分别为茎和叶片的4.4和13.97倍,萝卜硫素平均含量分别为茎和叶片的4和8.7倍,而有的基因型材料茎和叶片中4-甲基亚磺酰丁基硫苷的含量较高,约为花球中的50%;参试的10个不同基因型材料的花球、茎和叶片中的萝卜硫素含量与其前体4-甲基亚磺酰丁基硫苷含量间相关系数分别为0.9886**,0.9994**,0.9935**。【结论】不同青花菜材料间不同器官中4-甲基亚磺酰丁基硫苷含量存在显著差异;在青花菜萝卜硫素开发应用中,可选择其前体4-甲基亚磺酰丁基硫苷作为筛选指标,并可筛选茎和叶中4-甲基亚磺酰丁基硫苷含量较高的材料作为提取萝卜硫素的原料。  相似文献   

The Role of the Antebrachiocarpal Ligaments in the Prevention of Hyperextension of the Antebrachiocarpal Joint     

Joshua Milgram BVSc  Diplomate ECVS  Tomer Milshtein DVM  Yaron Meiner BSc ME 《Veterinary surgery : VS》2012,41(2):191-199

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Effects of zeranol-implantation periods on palatability of longissimus steaks from young bulls and steers     

J A Unruh  C D Pelton  D G Gray  M E Dikeman  D M Allen  L R Corah 《Journal of animal science》1987,65(1):165-172

Fifty-five fall-born, Simmental-crossbred, male calves were allotted at birth to one of five treatments: bulls castrated at 5 mo and implanted from birth to slaughter (ST); bulls implanted from birth to slaughter (BI-BS); bulls implanted from birth to weaning (BI-BW); bulls implanted from weaning to slaughter (BI-WS) and non-implanted control bulls (CB). Implanted calves received 36 mg of zeranol at approximately 100-d intervals. Calves were fed a high-concentrate diet from 8.1 mo of age to an average slaughter age of 17 mo. Longissimus steaks (LS) were evaluated for palatability traits by both a trained sensory panel (TSP) and a take-home consumer panel (CP). Conclusions from both panels were similar. The TSP found LS from ST to be juicier (P less than .05) than LS from all bull groups, and to be more tender (P less than .05) than LS from BI-BW and BI-WS. The CP found LS from ST to be juicier, more tender and more acceptable (P less than .05) than LS from BI-BW, BI-WS and CB. Steaks from BI-BS were more tender (P less than .05) than LS from BI-WS and CB. Steaks from BI-BS and BI-BW had lower (P less than .05) shear values than LS from CB, but LS from ST had lower (P less than .05) shear values than LS from all bull groups.(ABSTRACT TRUNCATED AT 250 WORDS)  相似文献   

Influence of dental carcass maturity classification on carcass traits and tenderness of longissimus steaks from commercially fed cattle     

Lawrence TE  Whatley JD  Montgomery TH  Perino LJ  Dikeman ME 《Journal of animal science》2001,79(8):2092-2096

Two hundred beef carcasses were randomly selected by dental classification (zero, two, four, six, or eight permanent incisors) from a population of 11,136 carcasses harvested by a large commercial beef processor. Warner-Bratzler shear force and trained sensory panel evaluations of longissimus thoracis steaks as well as cooking and carcass traits were evaluated for differences among dental classes. No differences in Warner-Bratzler shear force (P = 0.60), sensory panel evaluations (P = 0.64) for tenderness, or percentage of total cooking loss (P = 0.73) were found among the five dental classes. Longissimus muscle color, USDA marbling score, hot carcass weight, adjusted fat thickness, longissimus muscle area, and USDA yield grade did not differ among the five dental classes. A significant dental classification x sex interaction indicated that heifers advanced in skeletal and overall maturity at a much faster rate than steers. An increase of intramuscular fat was associated (P < 0.05) with decreased shear force (r = -0.31), whereas darkening of the lean (r = 0.16), advancing lean maturity (r = 0.21), and increased evaporative cooking loss (r = 0.39) were associated (P < 0.05) with increased shear force values. Warner-Bratzler shear force measurements were not related to sensory panel overall tenderness scores. Carcass traits accounted for a relatively small proportion of the variation in tenderness of longissimus steaks, and dental classification was not related to tenderness.  相似文献   

BSAVA Manual of Small Animal Ophthalmology, 2nd edn.     

ME Bernays 《Australian veterinary journal》2004,82(7):416-416

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