共查询到20条相似文献，搜索用时 890 毫秒
1.
《科技视界》2013,(32)
目的:观察橙皮苷对急性血瘀模型大鼠血液流变学指标的影响。方法:大鼠按分组分别ig给予橙皮苷橙皮苷80、160和320mg·kg-1及阿司匹林100mg·kg-1。每日早晚ig给药各1次,共7次。第5次给药后,sc给予肾上腺素加冰浴造成急性血瘀模型。锥板法测定全血粘度和血浆粘度;微量毛细血管法测定血细胞比容(Hct);光电比浊法测定二磷酸腺苷(ADP)诱导的血小板聚集;光电电磁法测定凝血参数。结果:与正常对照组相比,模型组大鼠全血粘度和血浆粘度升高,红细胞聚集指数和血小板最大聚集率显著增加。Hct显著升高,纤维蛋白原(Fib)含量显著增加,凝血酶时间(TT)、活化部分凝血活酶时间和凝血酶原时间(PT)均显著缩短(P<0.01)。与模型组相比,橙皮苷160和320mg/kg能显著降低全血粘度及血浆粘度,明显降低Hct、红细胞聚集指数和血小板最大聚集率、显著延长PT,橙皮苷160和320mg/kg显著降低Fib含量,延长TT。结论:橙皮苷能显著改善血瘀大鼠血液流变学异常。 相似文献
2.
裙带菜膳食纤维对小鼠肠蠕动及血液流变学的影响 总被引：2，自引：0，他引：2
目的：研究裙带菜膳食纤维对小鼠的肠蠕动和血液流变的调节作用。方法：将60只小鼠分为正常对照组、水不溶性裙带菜膳食纤维低剂量组（5%）、高剂量组（10%），连续30d，取30只小鼠进行肠蠕支实验。另外，将30只小鼠统一摘除右眼取血，测定其血液流变学指标中的血细胞比容及全血高切、低切表现粘度。结果：裙带菜膳食纤维高剂量组小鼠的炭末推进百分率与正常对照组相比有明显的差异（P＜0.01）；裙带菜膳食纤维高剂量小鼠的血细胞比容、全血高切、低切表观粘度及红细胞聚集指数均明显低于对照组（P＜0.01或P＜0.05）。结论：裙带菜膳食纤维增强小鼠的肠蠕动并且可以降低血细胞比容及全血高切、低切表现粘度，可提高血液的流动性。 相似文献
3.
4.
蜂胶对高粘滞血症患者血液流变学的影响 总被引：2，自引：0，他引：2
通过对160例典型高粘滞血症患者，给予饭前口服30％蜂胶酊30％蜂胶酊50滴，每日三次，同时服蜂胶片每次3片（每片0．1g)，与服前与服用四周后分别测全血比粘度、血浆比粘度、血沉、红细胞压积各一次。结果表明，高粘滞血症患者治疗后以上指标均显著或极显著性差异。服药后随血液粘度的降低，自觉头脑清晰，反应灵活，肢麻消失，体力增加，尤其冠心病组，服药期间，无一例发作者。证实了蜂胶确有防止或延缓动脉粥样硬化、狭窄和阻塞的作用；对心脑血管病的防治起到事半功倍的作用，同时对治疗糖尿病、高脂血症，提供了血液流变学指标的佐证。 相似文献
5.
奶牛围产期血液流变学主要指标的变化规律 总被引：14，自引：1，他引：13
为了解健康奶牛围产期血液流变学的变化规律，对１５头围产期（产前９０ｄ至产后３０ｄ）奶牛血液流变学的全血高、低切变率粘度，全血高、低切变率还原粘度，红细胞聚积指数，红细胞压积（ＰＣＶ），血浆粘度等５项指标进行了系统检测。结果表明，在产前９０～５ｄ，上述５项指标均呈下降趋势，且分别于分娩前１０、８、５、３、１ｄ降至最低水平；产后１～３ｄ内，除ＰＣＶ外，上述４项指标迅速升高达最高值，产后１周以后，随着泌乳量的逐日增加而逐渐恢复到常态。 相似文献
6.
7.
奶牛胎衣不下血液流变学主要指标的变化 总被引：8，自引：0，他引：8
本实验对９ 头胎衣不下病牛和１２ 头产后健康奶牛产后３０ｄ 内的血液流变学主要指标进行了系统监测。结果表明：在产后７ ～１０ｄ 内，病牛全血比粘度显著或极显著高于产后健康牛（Ｐ＜ ０－０５或０－０１） ；红细胞聚集指数、血浆比粘度和血浆纤维蛋白原含量亦显著或极显著升高（Ｐ＜ ０－０５ 或０－０１） ；红细胞压积呈降低趋势。病牛恶露排尽时间、产后首次发情时间显著延长，子宫内膜炎发病率显著升高，可能与体内血粘度持续升高、血液微循环障碍、子宫内分泌物排出困难有关 相似文献
8.
试验选择临床表现血瘀症状的产后病牛进行生化和血液流变学指标检测.结果:与健康奶牛产后8～10 h相应值比较,病牛血清WOD活性、血糖、血浆总蛋白、球蛋白含量显著降低(P《0.05),淀粉酶活性、白蛋白和血红蛋白含量差异不显著(P》0.05);全血比粘度、还原全血比粘度、血浆比粘度、红细胞聚集指数及血浆纤维蛋白原含量显著升高(P《0.005 或0.01),全血凝固时间显著缩短(P《0.05),而红细胞压积无明显变化 (P》0.05),临床症状与生化、血液流变学主要指标变化基本相符,据此初步提出了奶牛产后气虚血瘀证诊断标准. 相似文献
9.
研究利用人工气候仓模拟热应激环境,建立热应激仔猪模型。试验以64头2月龄中国试验用小型猪为研究对象,将其随机分为对照组、高温应激组、中草药复方提取物工治疗组和中草药复方提取物Ⅱ治疗组,通过Wintrobe测试分析红细胞压积,同时采用血液流变自动分析系统分析全血黏度等血液流变学参数,以期研究中草药复合提取物对热应激仔猪血液流变学指标影响的动态变化。结果显示：应激组仔猪全血黏度高切变率值在第10天显著高于对照组（P〈0．05）,红细胞变形指数在第6天和第10天显著低于对照组（P〈0．05）,红细胞压积在第1、3、6、10天均显著高于对照组（P〈0．05）。治疗组添加中草药提取物复合制剂后,血液流变学指标得到了明显恢复,尤其在热应激的第10天疗效果最明显（P〈0．05）。试验结果说明,热应激刺激对仔猪健康有显著影响,中草药提取复合物可以降低这种热应激产生的生理损伤,其中中草药提取复合物Ⅱ效果优于中草药提取复合物Ⅰ。 相似文献
10.
实验证明,活血汤、血府逐瘀汤及羌活祛风汤等活血化瘀复方,均有降低血液粘滞性的作用。血液流变学指出:血细胞的聚集性对血液粘滞性施以明显影响。本研究将通过了解上述方剂对血细胞聚集性的影响,进一步探讨其降低血液粘滞性的作用机理。 相似文献
11.
12.
13.
魏静 《四川畜牧兽医学院学报》2009,(4):28-32
在现代法律秩序中,商会自治规范是制定法的基础和必要的补充,甚至在某些方面替代了制定法;商会自治规范主要包括商会组织规范、行为规范、惩罚规范以及争端解决规范等;其效力仅及于其内部成员;商会自治规范和制定法之间存在冲突,但也存在整合的基础。 相似文献
14.
本文概述了猪的毛色类型、猪的毛色遗传模式,着重综述了猪毛色基因分子基础的研究进展,指出存在问题并就未来发展方向做了思考。 相似文献
15.
16.
以国际标准强毒Ｒ株人工感染非免疫产蛋鸡,定时扑杀,分别从鼻窦、眶下孔、气管、肺、气囊、卵巢和输卵管分离ＭＧ,并收集感染鸡所产蛋分离ＭＧ。结果表明,人工感染４８小时后上、下呼吸道及肺已被全面感染,９６小时气囊已被感染,１２０小时输卵管已能分离到ＭＧ,卵巢始终分离不到ＭＧ。人工感染鸡自１４４小时便能在其所产蛋中分离出ＭＧ。药物治疗能在７２小时内消除感染,油乳剂苗则需２４天后逐渐降低蛋内ＭＧ分离率,药物卵内注射、种蛋药浴、高温处理均能杀死卵内ＭＧ,但以研制的种蛋浸泡剂药浴效果为最好。 相似文献
17.
REASONS FOR PERFORMING STUDY: Centesis of the bicipital bursa using an 8.9 cm long spinal needle has been reported but the alternative of employing a 3.8 cm long hypodermic needle requires validation. OBJECTIVE: To compare the efficacy of 2 different methods of centesis of the bicipital bursa and to evaluate the usefulness of ultrasonographic imaging to determine the location of solution administered when centesis of the bursa is attempted. METHODS: For Trial 1, 6 clinicians, who had no previous experience of centesis of the bicipital bursa, attempted to inject a solution composed of an aqueous radiopaque contrast medium and physiological saline solution (PSS) into the bicipital bursae of 2/12 horses using the previously described distal approach to inject one bursa and a proximal approach to inject the contralateral bursa. The bicipital tendon and bursa were examined ultrasonographically before and after injection; and both shoulders were examined radiographically to identify the location of the medium. In Trial 2, another 6 clinicians, also with no previous experience of centesis, repeated Trial 1, using 6 horses, but the radiopaque contrast medium was mixed with air instead of PSS. RESULTS: Accuracy of centesis using the proximal approach was 39% and that of the distal approach 28%. Ultrasonographic examination of the shoulder allowed the location of solution and air to be accurately predicted in all 12 shoulders examined. CONCLUSIONS: Clinicians who have had no previous experience performing centesis of the bicipital bursa are unlikely to be successful in centesis using either approach. Radiographic examination after injecting a radiopaque contrast medium may be necessary to assess the success of centesis especially if bursal fluid is not obtained during centesis. Injecting air along with the radiopaque contrast medium provides more accurate ultrasonographic confirmation of centesis and better radiographic definition than does injection without air. 相似文献
18.
19.
20.
Effects of size of ingestively masticated fragments of plant tissues on kinetics of digestion of NDF
Ingestively masticated fragments were collected and sized via sieving. Different sizes of esophageal masticate and ruminal digesta fragments, and ground fragments of larger masticated pieces were incubated in vitro, and undigested NDF remaining at intervals of up to 168 h of incubation was determined. The ruminal age-dependent time delay (tau) for onset of digestion of NDF was positively correlated (P < 0.004) with the mean sieve aperture estimated to retain 50% of the fragments between successive sieve apertures (MRA). Degradation rate of potentially degradable NDF (PDF) and level of indigestible NDF were not related (P > 0.10) to MRA of masticated and ground fragments. Estimates of tau were positively related to MRA, with slopes of bermudagrass < corn silage < ruminal fragments of corn silage. It was concluded that fragment size-, and consequently, ruminal age-dependent onset of PDF degradation of a mixture of different fragment sizes results in an age-dependent rate of degradation of the more rapidly degrading of two subentities of PDF. Models are proposed that assume a tau before onset of simultaneous degradation of PDF from two pools characterized as having gamma-modeled age-dependency and age-constant rates. The ruminal age-dependent pool seems to be associated with the faster-degrading pool, and its rate parameter increases with range in MRA in the population of fragments. Conceptually, the ruminal age-dependent rate parameter for PDF degradation seems to represent a composite of several effects: 1) effects of the size-dependent tau; 2) range in MRA of the population of ingestively masticated fragments; and 3) subentities of PDF that degrade via more rapid age-dependent rates compared with subentities of PDF that degrade via age-constant rates. The estimated fractional rates of ruminative comminution of ingestively masticated fragments (0.060 to 0.075/h) were of a magnitude similar to the mean fractional rates of PDF digestion (0.030 to 0.085/h), which implies that ruminative comminution may be first-limiting to fractional rate of PDF digestion. The in vivo roles of ingestive and ruminative mastication of fragments on PDF degradation must be considered in any kinetic system for estimating PDF digestion in the rumen. These results and others in the literature suggest that the rate of surface area exposure rather than intrinsic chemical attributes of PDF may be first-limiting to degradation rate of PDF in vivo. 相似文献