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991.
992.
为了研究抗菌肽制剂对妊娠母猪蓝耳病抗体水平及生产性能的影响,根据品种相同、体重相当的原则,随机选取180头妊娠母猪,试验A组、B组以及对照组各60头,试验A、B组饲料中添加0.3%、0.5%抗菌肽,对照组饲料中添加抗生素。通过ELISA抗体检测方法 ,分别检测试验组和对照组的蓝耳病抗体水平。结果表明:试验A、B组的蓝耳病抗体水平(S/P值)的稳定比例分别为80%和88.3%,显著高于对照组的68.33%(P≤0.05);试验A、B组的死胎率、窝均木乃伊数和死胎数均显著低于对照组(P≤0.05),窝均健仔数显著高于对照组(P≤0.05)。 相似文献
993.
Adrian S. Siregar Marie Merci Nyiramana Eun-Jin Kim Soo Buem Cho Min Seok Woo Dong Kun Lee Seong-Geun Hong Jaehee Han Sang Soo Kang Deok Ryong Kim Yeung Joon Choi Dawon Kang 《Marine drugs》2021,19(11)
Models created by the intraperitoneal injection of lipopolysaccharide (LPS) and D-galactosamine (D-GalN) have been widely used to study the pathogenesis of human acute liver failure (ALF) and drug development. Our previous study reported that oyster (Crassostrea gigas) hydrolysate (OH) had a hepatoprotective effect in LPS/D-GalN-injected mice. This study was performed to identify the hepatoprotective effect of the tyrosine-alanine (YA) peptide, the main component of OH, in a LPS/D-GalN-injected ALF mice model. We analyzed the effect of YA on previously known mechanisms of hepatocellular injury in the model. LPS/D-GalN-injected mice showed inflammatory, apoptotic, ferroptotic, and pyroptotic liver injury. The pre-administration of YA (10 mg/kg or 50 mg/kg) significantly reduced the liver damage factors. The hepatoprotective effect of YA was higher in the 50 mg/kg YA pre-administered group than in the 10 mg/kg YA pre-administered group. These results showed that YA had a hepatoprotective effect by reducing inflammation, apoptosis, ferroptosis, and pyroptosis in the LPS/D-GalN-injected ALF mouse model. We suggest that YA can be used as a functional peptide for the prevention of acute liver injury. 相似文献
994.
植物源杀菌剂因其成分复杂、无污染、属性天然等特点,为水产养殖防治病原菌提供了新思路。本文以虎杖、千里光、黄柏、黄岑、苦参等为原材料,研制开发植物源杀菌剂,研究结果表明其对12种水产养殖常见病原菌均有较好的抑菌效果,对大肠杆菌、荧光假单胞菌的的最低抑菌浓度(MIC)为33μL/L,对金黄色葡萄球菌、痢疾志贺氏菌、温和气单胞菌的MIC为25μL/L,对肠炎沙门氏菌、单增李斯特氏菌的MIC为50μL/L,对拟态弧菌的MIC为100μL/L,对溶藻弧菌的MIC为250μL/L,对弗尼斯弧菌、副溶血弧菌的MIC为500μL/L,对创伤弧菌的MIC为1000μL/L。 相似文献
995.
996.
Antimicrobial peptide CAP18 and its effect on Yersinia ruckeri infections in rainbow trout Oncorhynchus mykiss (Walbaum): comparing administration by injection and oral routes 下载免费PDF全文
J K Chettri F Mehrdana E B Hansen A Ebbensgaard M T Overgaard A H Lauritsen I Dalsgaard K Buchmann 《Journal of fish diseases》2017,40(1):97-104
The antimicrobial peptide CAP18 has been demonstrated to have a strong in vitro bactericidal effect on Yersinia ruckeri, but its activity in vivo has not been described. In this work, we investigated whether CAP18 protects rainbow trout Oncorhynchus mykiss (Walbaum) against enteric red mouth disease caused by this pathogen either following i.p. injection or by oral administration (in feed). It was found that injection of CAP18 into juvenile rainbow trout before exposure to Y. ruckeri was associated with lowered mortality compared to non‐medicated fish although it was less effective than the conventional antibiotic oxolinic acid. Oral administration of CAP18 to trout did not prevent infection. The proteolytic effect of secretions on the peptide CAP18 in the fish gastrointestinal tract is suggested to account for the inferior effect of oral administration. 相似文献
997.
998.
Anke Mayer Michael Kilian Birgit Hoster Olov Sterner Heidrun Anke 《Pest management science》1999,55(1):27-30
Omphalotin A, a cyclic dodecapeptide produced by submerged cultures of the basidiomycete Omphalotus olearius, exhibited in-vitro and in-vivo nematicidal activity. Meloidogyne incognita was the most sensitive nematode. At 2.0 mg litre−1, 50% of the nematodes were dead after one hour. Heterodera schachtii, Radopholus similis and Pratylenchus penetrans were affected at higher concentrations. Incorporated into agar, the compound prevented infection of cucumber seedlings by M. incognita at concentrations of 1 mg litre−1 and higher. In glasshouse tests, complete protection of cucumbers and lettuce was achieved between 2.5 and 10 mg litre−1. No insecticidal activity was observed when Plutella xylostella, Phaedon cochleariae or Spodoptera frugiperda were fed material containing 4 g kg−1 of omphalotin A. © 1999 Society of Chemical Industry 相似文献
999.
A chloroform fraction prepared from the sarcotesta of Ginkgo biloba showed potent inhibitory activity against vancomycin-resistant Enterococcus (VRE). The active compounds were elucidated to be 2-hydroxy-6-(8-pentadecenyl) salicylic acid (1) and 2-hydroxy-6-(10-heptadecenyl) salicylic acid (2) based on their spectral analysis. Compounds 1 and 2 showed significant antibacterial activities against VRE. 相似文献
1000.