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531.
Effects of dietary fermented by‐product of mushroom,Pleurotus ostreatus,as an additive on growth,serological characteristics and nonspecific immune responses in juvenile Amur catfish,Silurus asotus 下载免费PDF全文
Kumar Katya Yong‐hyun Yun Hyeonho Yun Jeong‐Yeol Lee Sungchul C Bai 《Aquaculture Research》2016,47(5):1622-1630
The present experiment was conducted to evaluate the efficacy of dietary fermented by‐product of mushroom, Pleurotus ostreatus, (FBPM) as an additive in juvenile Amur catfish, Silurus asotus. Five diets were formulated to contain 0%, 0.1%, 0.2%, 0.4% and 0.8% (FBPM0, FBPM0.1, FBPM0.2, FBPM0.4 and FBPM0.8 respectively) of FBPM. Fifteen fish averaging 5.7 ± 0.1 g (Mean ± SD) were fed one of the five diets in triplicate groups at 3–4% of wet body weight/day for 8 weeks. Average weight gain (WG) and specific growth rate (SGR) of fish fed FBPM0.1 and FBPM0.2 diets were significantly higher than those of fish fed FBPM0. Hematocrit contents of fish fed FBPM0.2 were significantly higher than that of fish fed FBPM0. Lysozyme activity of fish fed FBPM0.1 was significantly higher than those of fish fed FBPM0, FBPM0.2, FBPM0.4 and FBPM0.8, while chemiluminescent (CL) responses of fish fed FBPM0.2 was significantly higher than those of fish fed FBPM0, FBPM0.1, FBPM0.4 and FBPM0.8. Broken line regression analysis of WG showed that optimum dietary FBPM levels based on WG could be 0.11%. Therefore, these results suggested that the optimum dietary inclusion level of mushroom, Pleurotus ostreatus by‐product fermented using lactobacillus and yeast could be greater than 0.11% but less than 0.2% based on WG and immunological responses in Amur catfish, Silurus asotus without any adverse effects on serological characteristics and body composition. 相似文献
532.
533.
Byeonghyeon Kim Han Tae Bang Jin Young Jeong Minji Kim Ki Hyun Kim Ju Lan Chun Sang Yun Ji 《The Journal of Poultry Science》2021,58(4):222
Insects are a potential source of proteins and fats which can be incorporated into diets of broiler chickens. Accordingly, black soldier fly larvae oil (BSFLO) needs to be tested as an appropriate fat source to produce healthy chickens for consumers. Therefore, the objective of the present study was to evaluate the effects of the replacement of soybean oil (SBO) with BSFLO in broiler diets on intestinal health and blood profiles. A total of 210 one-day-old male broilers were randomly allocated to three dietary treatments (10 replicates of seven birds per group): a control diet and two experimental diets in which SBO was replaced with 50% (50 BSFLO) or 100% (100 BSFLO) BSFLO. At the end of the study (35 days), 18 birds (six broilers per treatment) were slaughtered to determine the intestinal morphology, digestibility, and volatile fatty acid (VFA) profile. Blood samples were collected from 24 randomly selected birds (eight broilers per treatment) to determine the blood profiles. BSFLO supplementation positively affected villus height but did not affect digestibility. BSFLO showed no adverse effects on the VFA and blood profiles. In conclusion, the results of this study suggest that SBO can be replaced by BSFLO without any adverse effects on broiler health. 相似文献
534.
Jeong Jae Lee Sheena Kim Jin Ho Cho Hyunjin Kyoung Seonmin Lee Jeehwan Choe Yanhong Liu Peng Ji Xia Xiong Younghoon Kim Hyeun Bum Kim Minho Song 《Journal of animal science》2021,99(10)
The purpose of the current study was to assess the effects of substituting corn with ground brown rice on growth performance, immune status, and gut microbiota in weanling pigs. Seventy-two weanling pigs (28 d old with 6.78 ± 0.94 kg body weight [BW]) were randomly allotted to two dietary treatments with six pens and six pigs (three barrows and gilts) per pen within a randomized complete block design. The control pigs were fed a typical diet for weanling pigs based on corn and soybean meal diet (control diet: CON), and the other pigs were fed a formulated diet with 100% replacement of corn with ground brown rice for 35d (treatment diet: GBR). Growth performance, immune status, and gut microbiota of weanling pigs were measured. The substitution of corn with GBR did not affect growth performance or diarrhea frequency. Additionally, there were no differences in white blood cell number, hematocrit, cortisol, C-reactive protein, and serum tumor necrosis factor-alpha levels between pigs fed CON or GBR for the first 2 wk after weaning. However, weanling pigs fed GBR had lower (P < 0.05) serum transforming growth factor-beta 1 level than those fed CON. Furthermore, weanling pigs fed GBR had increased (P < 0.05) relative abundance of phylum Firmicutes and genus Lactobacillus and Streptococcus and decreased (P < 0.05) relative abundance of phylum Bacteroidetes and genus Clostridium and Prevotella in the gut microbiota compared with those fed CON. In conclusion, there was no significant difference in growth performance when corn was replaced with ground brown rice in diets for weanling pigs. Furthermore, the substitution of corn with ground brown rice in weaning diet modulated immune status and gut microbiota of pigs by increasing beneficial microbial communities and reducing harmful microbial communities. Overall, ground brown rice-based diet is a potential alternative to corn-based diet without negative effects on growth performance, immune status, and gut microbiota changes of weanling pigs. 相似文献
535.
Cara L. Brosnahan John S. Munday Hye Jeong Ha Mark Preece John B. Jones 《Journal of fish diseases》2019,42(1):85-95
A total of 777 fish from three growing regions of New Zealand Chinook salmon farms comprising of five sites were tested. Quantitative PCR was used to determine the distribution of New Zealand rickettsia‐like organism and Tenacibaculum maritimum. Genetic information from these bacteria were then compared with strains reported worldwide. Using this information, suggested associations of pathogens with clinically affected fish were made. NZ‐RLO was detected in two of the three regions, and T. maritimum was detected in all regions. Three strains of NZ‐RLO were identified during this study. Based on analysis of the ITS rRNA gene, NZ‐RLO1 appears to be part of an Australasian grouping sharing high similarity with the Tasmanian RLO, NZ‐RLO2 was shown to be the same as an Irish strain, and NZ‐RLO3 was shown be closely related to two strains from Chile. Based on multi‐locus sequence typing, the New Zealand T. maritimum was the same as Australian strains. NZ‐RLOs were detected more frequently in fish with skin ulcers than fish without skin ulcers. While additional research is required to investigate the pathogenicity of these organisms, this is the first time that NZ‐RLOs have been associated with the development of clinical infections in farmed Chinook salmon. 相似文献
536.
Tae Won Son Hae Shik Son Won Ki Kim Dong Won Lee Kwang Il Kim Jae Hun Jeong 《Fibers and Polymers》2000,1(1):6-11
In the polycondensation reaction of polyethyleneterephthalate(PET), Sb2O3 can react effectively as a catalyst, if physically transformed. Sb2O3 powder is transformed into liquid solution by dissolving in ethylene glycol(EG). Homogeneous catalyst is made by mixing this
liquid solution with glycols having different solubility. The efficient reaction of PET polymerization is expected by using
homogeneous catalyst. PET was synthesized using homogeneous catalysts of 4 wt.% Sb2O3 solution dissolved in glycol[EG, 2,2-bis(4-(2-hydroxyethoxy)phenol)propane(BHPP), neopentyl glycol(NPG), and 1,3-propandiol(PD)].
PET using EG-BHPP(Sb2O3) catalysts shows the highest I.V. within a reaction time of 120 min. In the p-d analysis, PET using EG-BHPP(Sb2O3) catalysts has the fastest propagation rate and slowest degradation rate. EG-BHPP(Sb2O3) catalysts are more efficient than EG(Sb2O3) catalysts and Sb2O3 powder catalysts. 相似文献
537.
538.
Song JM Lee YJ Jeong OM Kang HM Kim HR Kwon JH Kim JH Seong BL Kim YJ 《Veterinary microbiology》2008,130(3-4):268-276
The prevalence and continuous evolution of H9N2 avian influenza viruses in poultry have necessitated the use of vaccines in veterinary medicine. Because of the inadequate growth properties of some strains, additional steps are needed for producing vaccine seed virus. In this study, we generated three H9N2/PR8 reassortant viruses using a total cDNA plasmid-transfection system, as an alternative strategy for developing an avian influenza vaccine for animals. We investigated the vaccine potency of the reassortant viruses compared with the existing vaccine strain which was adapted by the 20th serial passages in embryonated eggs with A/Ck/Kor/01310/01 (H9N2). The H9N2/PR8 reassortant viruses, containing the internal genes of the high-yielding PR8 strain and the surface gene of the A/Ck/Kor/01310/01 strain, could be propagated in eggs to the same extent as existing vaccine strain without additional processing. Similar to vaccine strain, the H9N2/PR8 reassortant viruses induced hemagglutination-inhibiting antibodies in chickens and prevented virus shedding and replication in multiple organs in response to homologous infection. However, due to the continuing evolution and increasing biologic diversity of H9N2 influenza in Korea, the vaccine provided only partial protection against currently isolates. Taken together, our results suggest that the H9N2/PR8 reassortant virus can be used as a seed virus for avian influenza vaccines in poultry farm. Considering the constant genetic changes in H9 strains isolated in Korea, this reverse genetic system may offer a prompt and simple way to change the vaccine seed virus and mitigate the impact of unexpected influenza outbreaks. 相似文献
539.
Goo MJ Park JK Hong IH Yang HJ Yuan DW Ki MR Han JY Ji AR Kim TH Williams BH Jeong KS 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2008,70(6):633-635
A 3-year-old, female Spitz, was presented due to lack of response to therapies with a 6-month history of skin lesions characterized by diffuse erythema and scaling on the dorsal trunk. Physical examination revealed the dog was active and healthy. Skin culture isolated no fungus. Histological examination of skin biopsy specimens revealed interface dermatitis with hydropic degeneration of the basal layers, predominant plasmacytic perivascular accumulation in the dermis, and intensive plasma cell-rich interface mural folliculitis. Moderate CD3-positive lymphocytes infiltrated the superficial dermis. This report may provide unique information of canine discoid lupus erythematosus in an unusual breed with atypical cutaneous lesions. 相似文献
540.
The influence of the surface treatments on the performance of the hemp/PP (polypropylene) composite was investigated. The composites were prepared from the fiber modified by the alkalis and the oil under various conditions. The mechanical properties of the composites were measured using the tensile test, and the service time of the composite was assessed under accelerated condition by the stepped isothermal method. The alkaline treatment removed the lignin successfully and resulted in better fibrillation. The oil treatment improved the mechanical properties of the composites and extended the service life time of the composites. 相似文献