An Investigation of the Ability of the Glutaraldehyde Test to Distinguish between Acute and Chronic Inflammatory Disease in Horses     

P Brink  JC Wright  J Schumacher 《Acta veterinaria Scandinavica》2005,46(2):69-78

The Glutaraldehyde test (GT), a rapid and inexpensive test, has been utilized empirically for many years in bovine practice for diagnosing inflammatory diseases. GT is used primarily to demonstrate increased serum concentrations of fibrinogen and globulin. Glutaraldehyde binds with free amino groups in fibrinogen and immunoglobulin to create a clot in a first degree chemical reaction. The clotting time of the GT estimates the content of proteins produced in response to inflammation. The applicability of GT for diagnosing inflammation in the horse has never been investigated. The objective of this study was to determine the ability of GT to distinguish between acute and chronic inflammatory disease in horses. Thirty-seven horses with suspected inflammatory diseases were evaluated using the GT, history, complete clinical examination and routine blood analysis. GT-times, laboratory results and clinical outcome were compared statistically. Horses that were determined to be acutely affected (based on history, clinical examination and routine blood analysis) tended to have a negative GT (75%). Results of the GT did not correlate with blood fibrinogen concentration. Positive GT also predicted a fatal outcome in 69% of the clinical cases. The results of this trial indicate that GT can be a useful screening test to distinguish between acute and chronic inflammatory disease in horses.  相似文献   

Ovum Pick-up in Sheep: a Comparison between Different Aspiration Devices for Optimal Oocyte Retrieval     

C Rodríguez  L Anel  M Alvarez  E Anel  JC Boixo  CA Chamorro  P de  Paz 《Reproduction in domestic animals》2006,41(2):106-113

In vivo ovum pick-up (OPU) in sheep may be improved with a proper choice of aspiration elements (needle and tubing) and aspiration vacuum pressure. In the present study, two experiments were carried out. In Expt 1, visible follicles in ovaries of slaughtered ewes (treated separately according to their diameters: small<3 mm, medium 3-5 mm and large>5 mm) were aspirated using different combinations of the three studied factors such as aspiration flow rate (10, 20, 30, 40 and 50 ml water/min), needle gauge (18 and 20 G) and tubing inner diameter (1, 2 or 3 mm internal diameter). In Expt 2, a study with two 18 G needles of different lengths (18 G: 82 mm; 18 GL: 600 mm) was carried out, using ovaries obtained post-mortem, and performing in vivo laparoscopic follicular aspiration on ewes. We considered good quality oocytes as those with both complete compact cumulus and a homogeneous cytoplasm. Recovery rate, proportion of good quality oocytes (good quality oocytes/100 oocytes recovered) and overall efficiency (good quality oocytes/100 follicles aspirated) were noted. In Expt 1, aspiration flow rate affect remarkable proportion of good quality oocytes (69.5%, 50.5%, 44.8%, 36.5% and 28.3% for flows from 10 to 50 ml/min respectively, p<0.05). Needle gauge did not affect aspiration device efficiency. Thin and intermediate tubings were more effective (overall efficiency rates: 34.9%, 32.3% and 28.1% for 1, 2 and 3 mm respectively, p<0.05). Follicle size did not affect recovery rate, but proportion of good quality oocytes was higher for large (77.9%) and medium (64.4%) follicles (p<0.05). Finally, some combinations of the aspiration device showed greater effectiveness. In Expt 2, needle length did not influence recovery rate, but good quality oocytes rate was significantly modified both post-mortem and in vivo (good quality rate for 18 G vs 18 GL needles: 69.5% vs 47.7% and 58.1% vs 25.4%, post-mortem and in vivo respectively, p<0.05). We conclude that low-aspiration flow rates (10 and 20 ml/min) with thin or intermediate tubings (1 and 2 mm), and any short needle (18 G or 20 G) are the most adequate aspiration factors for OPU in sheep.  相似文献   

Ways to Improve the Biosecurity of Bovine Semen     

L de Ruigh  JC Bosch  MC Brus  B Landman  JS Merton 《Reproduction in domestic animals》2006,41(4):268-274

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Growth response of six weed species and spring barley (Hordeum vulgare) to increasing levels of nitrogen and phosphorus   总被引：1，自引：0，他引：1  

C ANDREASEN  A-S LITZ  & JC STREIBIG 《Weed Research》2006,46(6):503-512

A glasshouse experiment was carried out to investigate the influence of increasing levels of nitrogen and phosphorus on the growth of six common weed species growing alone or in competition with spring barley (Hordeum vulgare). Capsella bursa‐pastoris, Chenopodium album, Papaver rhoeas, Sinapis arvensis, Spergula arvensis, Viola arvensis and spring barley were grown in pots with different levels of nitrogen (0, 30, 60, 90, 120 and 150 kg N ha^?1) or phosphorus (0, 10, 20, 30, 40 and 60 kg P ha^?1). The aboveground parts of the plants were harvested after 7 weeks and the dry weight of shoots, percentage N and P content of the shoot and uptake of N and P were determined. A linear or a polynomial model was used to describe the data. Growing alone, Spergula arvensis was the only weed species that increased its dry weight at the same rate as barley. Weed species with low dry weight increase had larger increases in percentage N or P content than barley, indicating a luxury accumulation of nutrients. The uptake of N and P per pot did not differ much between weeds and barley. V. arvensis and P. rhoeas accumulated least nutrients (per cent of dry matter) and Spergula arvensis accumulated most. Weeds grew poorly in competition with barley. The percentage N and P content in barley did not change when they grew in competition with weeds.  相似文献   

Fungicides for the control of Mycogone perniciosa (Magn.), the cause of wet bubble on the cultivated mushroom     

Doreen G. Gandy  D.M. Spencer 《Scientia Horticulturae》1978,8(4):307-313

Two formulations of chlorothalonil (as Daconil 2787) were compared for their activity against Mycogone perniciosa Magn. on the cultivated mushroom Agaricus bisporus (Lange) Imbach. At the same does rates, the flowable formulation was more toxic than the wettable powder to both pathogen and host, but more marketable mushrooms were obtained from diseased plots treated with the flowable formulation at each dose rate (1.0, 0.5 and 0.1 g ai m^?2). Levels of disease control were related to dose rates, making it impracticable to lessen toxicity to mushrooms by reducing the dose rate. Fluotrimazole was less active than chlorothalonil against M. perniciosa and was more toxic to mushrooms.  相似文献   

Relationship of body condition score and oxidant stress to tumor necrosis factor expression in dairy cattle     

O'Boyle N  Corl CM  Gandy JC  Sordillo LM 《Veterinary immunology and immunopathology》2006,113(3-4):297-304

The relationship between body condition score (BCS) with measures of oxidative status and TNF-alpha production was examined in 16 mid-lactation dairy cows. Cows were selected based on either a normal (2.5-2.7) or a high (> or =3.5) BCS using the standard five-point scaling system. The metabolic status of all cows was determined by plasma nonesterified fatty acid levels (NEFA). Plasma samples or white blood cell lysates also were analyzed for indices of oxidant stress and for the expression of TNF-alpha. Cows with a high BCS had significantly lower NEFA levels when compared to normal BCS cows and the over-conditioned animals were not in a state of negative energy balance. No significant changes in lipid hydroperoxide levels, glutathione peroxidase activity, or the ratio of reduced (GSH) to oxidized (GSSG) glutathione was detected with respect to BCS. However, high BCS cows did have a significantly lower overall antioxidant potential and reduced TrxR activities when compared with the normal BCS cows. Changes in the oxidative state of over-conditioned cows were accompanied by a significantly higher expression of TNF-alpha. Results from this study suggest that cows with a high BCS can experience oxidant stress in the absence of altered energy status. Increased TNF-alpha expression may be related to the pro-oxidant state of over-conditioned cows and possibly be a contributing factor to the enhanced susceptibility to disease in high BCS dairy cattle.  相似文献   

Peripheral markers of oxidative stress in Labrador retrievers with copper-associated hepatitis     

A. M. Vincent  L. M. Sordillo  R. C. Smedley  J. C. Gandy  J. L. Brown  D. K. Langlois 《The Journal of small animal practice》2021,62(10):866-873

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Vertical Flux of Biogenic Carbon in the Ocean: Is There Food Web Control?     

RB Rivkin  L Legendre  D Deibel  JE Tremblay  B Klein  K Crocker  S Roy  N Silverberg  C Lovejoy  F Mesple  N Romero  MR Anderson  P Matthews  C Savenkoff  A Vezina  JC Therriault  J Wesson  C Berube  RG Ingram 《Science (New York, N.Y.)》1996,272(5265):1163-1166

Models of biogenic carbon (BC) flux assume that short herbivorous food chains lead to high export, whereas complex microbial or omnivorous food webs lead to recycling and low export, and that export of BC from the euphotic zone equals new production (NP). In the Gulf of St. Lawrence, particulate organic carbon fluxes were similar during the spring phytoplankton bloom, when herbivory dominated, and during nonbloom conditions, when microbial and omnivorous food webs dominated. In contrast, NP was 1.2 to 161 times greater during the bloom than after it. Thus, neither food web structure nor NP can predict the magnitude or patterns of BC export, particularly on time scales over which the ocean is in nonequilibrium conditions.  相似文献   

Simultaneous Measurement of Local Gain and Electron Density in X-ray Lasers     

R Cauble  Da Silva LB  TW Barbee  P Celliers  C Decker  RA London  JC Moreno  JE Trebes  AS Wan  F Weber 《Science (New York, N.Y.)》1996,273(5278):1093-1096

X-ray lasers (XRLs) have experimental average gains that are significantly less than calculated values and a persistently low level of spatial coherence. An XRL has been used both as an injected signal to a short XRL amplifier and as an interferometer beam to measure two-dimensional local gain and density profiles of the XRL plasma with a resolution near 1 micrometer. The measured local gain is in agreement with atomic models but is unexpectedly spatially inhomogeneous. This inhomogeneity is responsible for the low level of spatial coherence observed and helps explain the disparity between observed and simulated gains.  相似文献   

栽培稻分类方法的比较   总被引：18，自引：3，他引：18  

周汇  JC Glaszmann  程侃声  施晓群 《中国水稻科学》1988,2(1):1-7

 为了比较Glaszmann和程侃声等对亚洲栽培稻的分类体系,将Glaszmann氏提供的197个水稻品种的同功酶位点原始记录和程氏对它们就6个形态性状的评分作了主成分分析和聚类分析。结果显示二人的分类基本一致,数值分类也表明栽培稻可以只分籼粳两个亚种,处于中间的少数品种可称为偏籼或偏粳。程氏采用的“性状指数法”似更为便利而有效,特别适于田间及育种工作,虽然带有一定的经验成分,但加以生化或数值分类的检验,即可弥补该法的不足,有助于澄清个别不够明确和错划的事例。因此,我们建议为求得最佳的分类系统,最好运用二种以上的方法,相互补充校正。  相似文献