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Comparative pharmacokinetics of doramectin and ivermectin in sheep 总被引：11，自引：0，他引：11
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The pharmacokinetics of kitasamycin after intravenous and oral administration in a dose of 300 mg/kg b.wt. was studied in 18 healthy and 18 Salmonella gallinarum naturally infected chickens. The tissue residue of the studied antibiotic was estimated in 36 normal chickens when it was given orally for 7 successive days. Therapeutic level of kitasamycin was achieved after 15 minutes and persisted for 20-22 hours after its oral administration. Higher serum kitasamycin concentrations were recorded in Salmonella gallinarum infected chickens. The elimination half-life of kitasamycin calculated after single intravenous injection was 9.03 hours in diseased chickens corresponding to 3.74 hours in healthy birds. The body clearance was significantly reduced in diseased chickens (23.86 ml/kg/min) when compared to that in normal ones (62.03 ml/kg/min). Kitasamycin treated broilers should not be slaughtered before 3 days from the last dose as it was detected only in bile and caecum at that time but not in edible tissues. 相似文献
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A Mn2(+)-dependent ribozyme 总被引：3，自引：0，他引：3
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Effect of adding different levels of rumen protected choline to the diet on productive and reproductive performance of female goats and growth of their kids from birthing to weaning 
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下载免费PDF全文 Alsaied A. Habeeb Ahmed E. Gad Mostafa A. Atta Mohammed M. Mustafa 《Animal Science Journal》2018,89(2):348-358
Forty female goats in the third parity were randomly divided into four similar groups. The experiment was started 20 days before mating and lasted until the end of the suckling period for 60 days and weaning their kids. The first group were fed diet without supplementation and kept as control while in the second, third and fourth groups, each doe was fed diets with rumen protected choline (RPC) at the rate of 10, 20 and 40 g/day, respectively. Results showed that number of doe kidding twins and triplets and litter weight of kids born per group increased with increasing the level of RPC in the diet of goats and viability rate of born kids during the suckling period improved due to RPC supplementation in the diets of their mothers. Duration of estrous, days from weaning to estrous, days from kidding to estrous and kidding interval decreased significantly, while conception rate increased due to adding RPC. Milk choline concentrations and total choline secretion though milk were progressively increased significantly with increasing the level of RPC supplementation. Live body weight and daily body gain of their suckling male and female kids at weaning increased significantly with increasing RPC levels in the diets of their mothers. 相似文献
5.
Qiong Wu Mengji Cao Huanan Su Sagheer Atta Fangyun Yang Xuefeng Wang Changyong Zhou 《European journal of plant pathology / European Foundation for Plant Pathology》2014,139(1):13-17
CVd-I-LSS (low sequence similarity), a variant of Citrus bent leaf viroid (CBLVd), was first discovered in Japan, and its distribution is currently limited to Japan and Iran. In the present study, seven CVd-I-LSS isolates were detected from different citrus hosts (Citrus sinensis, C. reticulata and C. limettioides) in Pakistan and China. Genetic diversity analysis of 49 cDNAs of CVd-I-LSS isolates showed that the Pakistan population was more diverse than that tested from Japan or China. Phylogenetic analysis clustered the predominant sequences examined into three main clades. Only sequences from the Pakistan isolates were found in all three clades, suggesting Pakistan may be the original source of CVd-I-LSS. Cultivar import records and the close phylogenetic relationship found between CVd-I-LSS from China and Japan suggested that the viroid isolated from China might have originated from Japan. 相似文献
6.
Yaser Hosny Elewa Mohammad Hafez Bareedy Ahmed Awad Abu Al Atta Osamu Ichii Saori Otsuka Tomonori Kanazawa Shin-Hyo Lee Yoshiharu Hashimoto Yasuhiro Kon 《Veterinary research communications》2010,34(6):557-567
Previously, the distribution of myoepithelial cells (mecs) in the salivary glands was studied by both immunohistochemistry,
and transmission electron microscopy; however, little was elucidated concerning their morphological features, especially in
goats. This study was performed to investigate the correlation between the cytoarchitecture of the mecs in goat major salivary
glands (parotid, mandibular, and sublingual glands) and the nature of the saliva secretion. The cytoarchitectural features
of the mecs were examined by scanning and transmission electron microscopy as well as immunohistochemically. The secretory
endpieces in the parotid gland are of the pure serous type, but in both the mandibular and sublingual glands they are of the
mixed type. In all studied glands, the intercalated ducts were covered by mecs which, unlike the large stellate cells that
surrounded the secretory endpieces, were spindle-shaped with few cytoplasmic processes. Interestingly, the mecs were found
to bulge on the basal surfaces of the serous acini and intercalated ducts in all glands and to be in close contact to the
seromucous tubules surface in the mandibular and sublingual glands forming a continuous network around it. In conclusion,
the differences in the degree of development of the mecs as well as the number of their cytoplasmic processes may be correlated
with the nature of the secretion and the number of the secretory granules. Thus these observations may have some relevance
in the diagnosis of atrophy and pathogenic conditions of these glands. 相似文献
7.
Mengji Cao Sagheer Atta Huanan Su Xuefeng Wang Qiong Wu Zhongan Li Changyong Zhou 《European journal of plant pathology / European Foundation for Plant Pathology》2013,135(1):11-21
Citrus viroid V (CVd-V) was recently characterized and belongs to the genus Apscaviroid within the family Pospiviroidae. 334 CVd-V isolates were identified from Punjab, Pakistan, where CVd-V had not been reported. A total of 68 independent cDNA clones were sequenced from 11 infected trees of different cultivars, ranging from 292 to 295 nucleotides. The nucleotide diversity estimated from the nucleotide distances of the CVd-V Pakistan population was similar to that reported from other countries. Based on genetic diversity and phylogenetic analysis, two main CVd-V groups were identified indicating that Pakistan might be one of the geographic origins of CVd-V worldwide. We demonstrated that this viroid has not emerged recently and it is more widespread than previously expected. 相似文献
8.
El-Tarabany Mahmoud S. Atta Mostafa A. Emara Sana S. Mostafa Mohamed M. 《Tropical animal health and production》2020,52(1):301-308
Tropical Animal Health and Production - The aim was to explore the impact of periconceptional folic acid or flaxseed oil (FXO) supplementation on fertility, progesterone profile, and blood... 相似文献
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Liu Qiuping Atta Ur Rehman Wang Renfen Liu Kexin Ma Xia Weng Qingbei 《European journal of plant pathology / European Foundation for Plant Pathology》2021,160(3):707-716
European Journal of Plant Pathology - Increasing evidence suggest that melatonin (N-acetyl-5-methoxytryptamine), an indolic compound identified from the pineal gland of mammals, regulates plant... 相似文献
10.
ZHAO Yong-guo Ofori Atta LU Chang-ming 《中国农业科学(英文版)》2009,8(8):931-938
The Brassica oilseed crops went through two major breeding bottlenecks during the introgression of genes for zero erucic acid and low glucosinolate content, respectively, which may lead to reduced genetic biodiversity of the crop. This study investigates the impact of these bottlenecks on the genetic diversity within and across European and Chinese winter B. rapa cultivars. We compared eight cultivars from Europe and China, representing three different seed qualities from three different breeding periods： （1） high erucic acid, high glucosinolates （＋＋）; （2） zero erucic acid, high glucosinolates（0＋）; （3） zero erucic acid, low glucosonolates （00, canola quality）. Diversity was estimated on 32 plants per cultivar, with 16 simple sequence repeat （SSR） markers covering each of the B. rapa linkage groups. The analysis of molecular variance （AMOVA） showed that genetic variations within cultivars, across cultivars and across regions （Europe and China） were significant, with about 60% of the total variation within cultivars. There was a slight, but non-significant loss in genetic diversity within cultivars when comparing the three breeding periods as indicated by effective number of alleles （2.39, 2.23, and 1.99 for breeding periods 1, 2, and 3, respectively）, Shannon information index （0.93, 0.90, 0.75）, and expected heterozygosity （0.51, 0.49, 0.42）. By cluster analysis （UPGMA dendrogram） and principal coordinate analysis, Chinese and European cultivars were clearly divided into two distinct groups. In conclusion, quality improvement did not significantly reduce the genetic diversity of European and Chinese B. rapa cultivars. 相似文献