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纳米蒙脱石在饲料中的应用 总被引：2，自引：0，他引：2
蒙脱石也叫八面体蒙脱石或十六角蒙脱石,是一种良好的胃粘膜防护剂.蒙脱石对大肠杆菌、霍乱弧菌、空肠弯曲菌、金萄菌和轮状病毒、胆盐及霉茵毒素都有较好的吸附作用,且对表面带有粒编码蛋白(CS31A)的致病性带电病原茵有固定清除作用.研究总结还表明纳米蒙脱石比普通蒙脱石吸附能力高,对非感染仔猪腹泻总有效率高达94.1%,其用法简单,可添加饲料中,每吨饲料添加3公斤;也可直接兑水灌服,3-5克/只. 相似文献
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纳米蒙脱石治疗仔猪腹泻 总被引：1，自引：1，他引：0
蒙脱石也叫八面体蒙脱石或十六角蒙脱石,是一种良好的胃黏膜防护剂.蒙脱石对大肠杆菌、霍乱弧菌、空肠弯曲菌、金葡菌和轮状病毒、胆盐及霉菌毒素都有较好的吸附作用,且对表面带有粒编码蛋白(CS31A)的致病性带电病原菌有固定清除作用.研究结果表明纳米蒙脱石比普通蒙脱石吸附能力高,对非感染仔猪腹泻总有效率高达94.1%,其用法简单,可添加饲料中,每吨饲料添加3kg;也可直接兑水灌服,3～5g/只. 相似文献
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纳米蒙脱石替代氧化锌对断奶仔猪生产性能的影响 总被引：7，自引：1，他引：7
选取84头体重相近的二元杂交断奶仔猪,随机分为3个处理组,每个处理组4个重复,每个重复7头(公母比例为4:3),各个重复统计检验差异不显著.处理1(对照组)饲喂基础日粮,处理2(氧化锌组)和处理3(纳米蒙脱石组)分别在基础日粮中添加3 000mg/kg氧化锌和3 000mg/kg纳米蒙脱石,试验期为28d.结果表明,纳米蒙脱石在控制仔猪腹泻方面与氧化锌具有相同的效果;氧化锌组和纳米蒙脱石组的ADFI分别比对照组提高13.8%(P＜0.05)和12.4%(P＜0.05);纳米蒙脱石组与氧化锌组相比,试验前期料重比降低9.0%(P＜0.05),试验全期降低6.2%(P＜0.05).以上结果说明,在断奶仔猪日粮中添加纳米蒙脱石完全可以替代氧化锌控制腹泻,同时还可以提高饲料转化效率. 相似文献
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试验将蒙脱石和凹凸棒石分别添加到含有黄曲霉毒素B1(AFB1)、玉米赤霉烯酮和T-2毒素的人工胃液或人工肠液中,探讨2种矿物对霉菌毒素的吸附作用。结果表明,蒙脱石和凹凸棒石对AFB1、玉米赤霉烯酮、T-2毒素的吸附均在1 h达到平衡;钠基蒙脱石对AFB1和T-2毒素的吸附率高于钙基蒙脱石和凹凸棒石,吸附率分别为96.8%、38%;蒙脱石和凹凸棒石对玉米赤霉烯酮的吸附率均小于10%。pH对蒙脱石和凹凸棒石吸附霉菌毒素影响显著(P<0.05),pH 5时钙基蒙脱石对AFB1的吸附率显著高于pH 3、pH 7时(P<0.05),为90.1%;蒙脱石和凹凸棒石对玉米赤霉烯酮的吸附效果在pH 3时较佳,对T-2毒素的吸附效果在pH 7时显著高于pH 3、pH 5时(P<0.05)。蒙脱石和凹凸棒石对吸附的霉菌毒素均存在解吸现象,其中AFB1和玉米赤霉烯酮解吸明显。蒙脱石和凹凸棒石对霉菌毒素的吸附作用使其成为重要的吸附剂,然而作为吸附剂的同时不能忽视霉菌毒素的解吸现象,综合考虑吸附与解吸2种现象以便在生产实践中更好的脱除霉菌毒素。 相似文献
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纳米蒙脱石替代喹乙醇对獭兔幼兔生长和腹泻的影响 总被引：2，自引：0，他引：2
选取60日龄体重相近、发育良好的獭兔120只,预饲3d后,随机分为3个处理组(即对照组、纳米蒙脱石试验组和喹乙醇试验组),每组40只。处理1(对照组)饲喂基础日粮,处理2(纳米蒙脱石组)和处理3(喹乙醇组)分别在基础日粮中添加3kg/t(饲料)纳米蒙脱石和400g/t(饲料)喹乙醇,试验期为30d。结果表明:纳米蒙脱石能较好的控制幼兔腹泻,具有与喹乙醇相同的效果;但在本试验的试验期内纳米蒙脱石和喹乙醇对幼兔生长的促进作用均不显著。 相似文献
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蒙脱石及改性蒙脱石对黄曲霉毒素B1的吸附研究 总被引：9，自引：0，他引：9
分别研究了在pH2．06及pH8．01条件下及有无赖氨酸存在时蒙脱石及改性蒙脱石对黄曲霉毒素B1的吸附和解吸规律。结果表明，蒙脱石和改性蒙脱石对黄曲霉毒素B1均有较强的吸附性，吸附量随黄曲霉毒素B1含量增加而增加，两者呈直线相关。当吸附反应体系中赖氨酸含量为0．2％、0．4％时，不影响蒙脱石及改性蒙脱石对黄曲霉毒素B1的吸附。蒙脱石和改性蒙脱石对黄曲霉毒素B1的吸附量大小相近，但改性蒙脱石对黄曲霉毒素B1的吸附量不受边面封闭剂的影响，且改性蒙脱石吸附黄曲霉毒素B1后，黄曲霉毒素B1的解吸率较蒙脱石低，表明有机改性蒙脱石对黄曲霉毒素B1有更高的吸附稳定性。 相似文献
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纳米蒙脱石在养猪生产中的应用 总被引：2，自引：0，他引：2
纳米蒙脱石是采用优质天然蒙脱石为原料,经提纯、超微粉碎(纳米杂化)而得到的禽畜类绿色保健产品,源于天然,所以自然,可完全替代氧化锌和抗生素,控制猪仔腹泻特别是乳仔猪营养性腹泻更有效,彻底解决抗生素的耐药性和残留问题,成功化解氧化锌的高成本和副作用,同时对饲料具有防霉脱毒和改善铅诱导损伤的可能。纳米蒙脱石连同吸附的致病因子及重金属,随粪便一起排出,完全不进入血液,非常安全,无休药期,无毒副作用,不产生抗药性。1纳米蒙脱石可治疗仔猪和中大猪腹泻纳米蒙脱石是一种新型矿物药剂,用于治疗禽畜类腹泻、痢疾等,无药物残留、无耐… 相似文献
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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
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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
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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
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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
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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