An Isolated Case Of Swine Erysipelas In An Institutional Herd Report Of A Case          下载免费PDF全文

R. J. Julian  J. Ditchfield 《Canadian journal of veterinary research》1959,23(2):57-58

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Anophthalmia or Congenital Absence of the Eyes in a Calf          下载免费PDF全文

Julian RJ  Taylor WA  Meads EB 《The Canadian veterinary journal. La revue veterinaire canadienne》1960,1(9):408-409

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麦长管蚜全纯人工饲料的研究   总被引：10，自引：0，他引：10  

陈巨莲  倪汉祥  丁红建  孙京瑞 《中国农业科学》2000,33(3):54-59

 用双层石蜡膜 ( Parafilm‘M’)夹营养液的方法饲养麦长管蚜。经系统分析小麦植株的营养成分和反复实验 ,确定麦蚜全纯人工饲料配方 ,营养液的适宜 p H值为 6.0 ,适宜糖浓度为 2 5%。对所选的基础饲料配方的氨基酸和维生素单一缺失实验结果表明 ,麦长管蚜必需的营养物质中包括 9种氨基酸和 8种维生素 ,非必需营养组分包括 6种氨基酸及泛酸钙和肌醇等 2种维生素 ,此外 7种氨基酸以及核黄素为非营养组分或有害组分。通过全部剔除非营养组分后得到的纯人工饲料饲养的结果表明 ,麦长管蚜饲养的结果很好 ,其存活率及繁殖力与感蚜麦苗上的差异不显著 ,而且可连续饲养 2代。  相似文献   

Prevalence of vancomycin-resistant Enterococcus faecium (VREF) in pig faeces from slaughterhouses in Spain     

Inmaculada A. Herrero  Tirushet Teshager  Julian Garde  Miguel A. Moreno  Lucas Domínguez 《Preventive veterinary medicine》2000,47(4)

A study to estimate the prevalence of vancomycin-resistant Enterococcus faecium in faecal samples from pigs at slaughterhouses in Spain was carried out between November 1998 and January 1999 with 900 samples taken from four abattoirs representing 9.7% of all pig slaughtered in 1998. Using a selective enrichment broth with vancomycin (8 μg/ml), 64 samples (7.1%; 95% CI: 5.5, 9.0%) had E. faecium vancomycin-resistant strains that showed minimal inhibitory concentrations of 256 μg/ml (62 strains) and 512 μg/ml (two strains). Results by farm showed that 43 of the 240 pig farms represented in the sampling had at least one faecal sample with vancomycin-resistant E. faecium.  相似文献   

Rapid pneumococcal evolution in response to clinical interventions   总被引：1，自引：0，他引：1  

Croucher NJ  Harris SR  Fraser C  Quail MA  Burton J  van der Linden M  McGee L  von Gottberg A  Song JH  Ko KS  Pichon B  Baker S  Parry CM  Lambertsen LM  Shahinas D  Pillai DR  Mitchell TJ  Dougan G  Tomasz A  Klugman KP  Parkhill J  Hanage WP  Bentley SD 《Science (New York, N.Y.)》2011,331(6016):430-434

Epidemiological studies of the naturally transformable bacterial pathogen Streptococcus pneumoniae have previously been confounded by high rates of recombination. Sequencing 240 isolates of the PMEN1 (Spain(23F)-1) multidrug-resistant lineage enabled base substitutions to be distinguished from polymorphisms arising through horizontal sequence transfer. More than 700 recombinations were detected, with genes encoding major antigens frequently affected. Among these were 10 capsule-switching events, one of which accompanied a population shift as vaccine-escape serotype 19A isolates emerged in the USA after the introduction of the conjugate polysaccharide vaccine. The evolution of resistance to fluoroquinolones, rifampicin, and macrolides was observed to occur on multiple occasions. This study details how genomic plasticity within lineages of recombinogenic bacteria can permit adaptation to clinical interventions over remarkably short time scales.  相似文献   

自然保护区生态旅游管理主体研究     

王祖良  李健  刘菊莲  赵明水 《国家林业局管理干部学院学报》2007,6(4):53-57

生态旅游是自然保护区实现可持续发展的有效途径.自然保护区生态旅游发展的根本保障在于建立起一套科学规范的管理体制.自然保护区生态旅游管理主体主要有国家、政府部门、自然保护区管理者、生态旅游经营者、生态旅游者和社区居民等.要在它们之间建立一个协调有序的管理体系. .  相似文献   

Semen analysis of boars under intertropical conditions reveals the relevance of proximal and distal cytoplasm droplets for sperm functional integrity     

Julian Valencia  Edgar Andrés Alzate  Germán Gómez  Marc Yeste  Francisco Javier Henao 《Reproduction in domestic animals》2021,56(6):905-914

This work aimed to establish whether the temperature humidity index (THI) under different intertropical zones affects the retention of cytoplasmic droplets (CDs), sperm function and DNA integrity in boars. With this purpose, two separate studies were devised. In the first one, 49 boars from six farms were collected every 45 days (230 ejaculates). THI were measured daily, and sperm parameters were evaluated. Boars were classified into three groups based on the incidence of ejaculates having more than 25% spermatozoa with CDs: persistent (at least three consecutive ejaculates), moderate (less than three ejaculates) and absent (no ejaculate having ≥25% spermatozoa with CDs). Farms were classified based on THI through cluster analysis into two groups. In the second study, 32 liquid-stored semen samples were classified based on three cluster analysis: low and high incidence of proximal (PCDs), distal (DCDs) CDs and a combination of PCD and DCDs. high THI farms presented significantly (p < .05) higher proportions of boars with moderate and persistent incidence of CD than those with low THI. In study 2, the presence of PCDs was negatively correlated with sperm DNA integrity (r = −0.691; p < .01). However, differences between groups were more apparent when ejaculates were classified based on both PCDs and DCDs than when PCDs or DCDs were considered separately. In conclusion, classification of boars according to the severity and persistence of CDs in boars allows understanding more clearly the dynamics of CD retention and the effects of ambient temperature and relative humidity. Additionally, the joint analysis of both PCDs and DCDs is necessary in routine sperm quality analyses.  相似文献   

Production and characterization of O/W emulsions containing droplets stabilized by lecithin-chitosan-pectin mutilayered membranes     

Ogawa S  Decker EA  McClements DJ 《Journal of agricultural and food chemistry》2004,52(11):3595-3600

The possibility of producing stable oil-in-water (O/W) emulsions containing oil droplets surrounded by multiple layer interfacial membranes from food grade ingredients has been demonstrated. These emulsions were produced using a three stage process that relies on the adsorption of charged biopolymers to oppositely charged surfaces. Emulsions (0.5 wt % corn oil, 0.1 wt % lecithin, 0.0078 wt % chitosan, 0.02 wt % pectin, and 100 mM acetic acid, pH 3.0) containing oil droplets stabilized by lecithin-chitosan-pectin membranes were formed using this interfacial layer-by-layer deposition process. The droplets in these emulsions had good stability to aggregation over a wide range of pH values and salt concentrations (pH 4-8 at 0 mM NaCl and pH 3-8 at 100 mM NaCl). This technology could be extremely useful to the food industry for the creation of O/W emulsions with improved properties or novel applications, e.g., improved stability to environmental stresses, protection of labile substances, controlled release, and triggered release.  相似文献   

Relation between wheat-rye crossability and seed set of common wheat after pollination with other species in the Hordeae   总被引：1，自引：0，他引：1  

Julian B. Thomas  P. J. Kaltsikes  R. Glenn Anderson 《Euphytica》1981,30(1):121-127

Summary Cultivars of common wheat (Triticum aestivum L. em. Thell.) of high wheat-rye (Secale cereale L.) crossability set more seed with pollen of other related species than did wheats of low wheat-rye crossability. This was found to be true for pollen parents from the genera Triticum, Aegilops, Secale, Agropyron and Elymus.  相似文献   

Riparian land use and in-channel stressors drive fish community structure in the Yangtze River     

Xiong  Fangyuan  Olden  Julian D.  Lu  Ying  Liu  Han  Qu  Xiao  Xia  Wentong  Guo  Chuanbo  Wu  Xinghua  Infante  Dana M.  Wang  Lizhu  Chen  Yushun 《Landscape Ecology》2021,36(10):3079-3095

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