Evaluation of an electronic device used as a quick screening method to detect changes in the red cell content of the blood in horses participating in endurance trail rides     

A. De Waal  F. J. Potgieter 《Veterinary research communications》1991,15(4):309-314

Dehydration, to varying degrees, will inevitably occur in horses participating in endurance trail rides. This water loss is directly related to the amount of body water lost through evaporative cooling, that in turn being related to the amount and rate of work performed, and to the environmental temperature and humidity.An electronic apparatus that can substitute for the conventional and time-consuming venous haematocrit was developed to measure the animals' hydration status. The mechanism of this electrometer is based upon the relationship between the red cell content and the electrical conductivity of the blood. The electrometer reading gave a significant correlation (p<0.001) with the venous haematocrit, thus indicating that the electrometer is a reliable apparatus for determining the animals' hydration status within seconds of venepuncture.  相似文献   

Effect of feed deprivation on daily water consumption in healthy horses     

David E. Freeman  Alexandra Mooney  Steeve Giguère  Jami Claire  Chloe Evetts  Patricia Diskant 《Equine veterinary journal》2021,53(1):117-124

  相似文献   

Suspected levamisole intoxication in calves     

KR Müller  C Dwyer 《New Zealand veterinary journal》2016,64(4):257-260

CASE HISTORY: A group of 32 Friesian and four Hereford calves, 3–4 months old with body weights between 100–120?kg, were purchased from a weaner sale. On arrival at the property the Hereford calves were treated with a combination anthelmintic containing 2?g/L abamectin and 80?g/L levamisole hydrochloride. Shortly afterwards they developed tremors and frothing from the mouth, and two died overnight. The Friesian calves were treated with the same anthelmintic on the following day, when some showed hypersalivation and frothing from the mouth.

CLINICAL FINDINGS: Examination of the three most severely affected Friesian calves revealed severe nicotinic-type symptoms including hypersalivation, frothing from the mouth, muscle tremors, recumbency, rapid respiration, hyperaesthesia, and central nervous system depression. Other calves showed mild to moderate signs of intoxication including restlessness, tail switching, salivation, tremors, frequent defaecation, mild colic and jaw chomping. Two calves died shortly afterwards. An adverse drug event investigation revealed that the formulation and quality of the anthelmintic was within the correct specification, and that the drench gun was functioning correctly.

DIAGNOSIS: Suspected levamisole intoxication due to a combination of possible overdosing, dehydration, and stress caused by transportation and prolonged yarding.

CLINICAL RELEVANCE: Susceptibility to levamisole toxicity in New Zealand calves can be increased if factors like dehydration or stress are present. Levamisole has a narrow margin of safety, and overdosing in calves can easily occur if the dose rate is not based on their actual weight or health status.  相似文献   

石化污泥脱水工艺优化研究     

杨瑞洪  刘丹 《安徽农业科学》2010,38(30):17015-17016

[目的]确定污泥最佳絮凝剂种类及其最佳的投加量和脱水工艺参数。[方法]针对石化企业污泥脱水工艺中存在的问题，以污泥沉降性能、污泥比阻和滤饼含水率为指标筛选出最佳絮凝剂，并通过正交试验对污泥脱水工艺进行优化。[结果]各因素对滤饼含水率的影响顺序为：搅拌水平〉投加量〉抽滤压力〉絮凝剂。最佳操作条件为絮凝剂K6728投加量2．0ml；搅拌水平150r／min 10s，50r／min 10min：过滤压力0．05MPa。各因素对污泥比阻的影响顺序为：搅拌水平〉抽滤压力〉投加量〉絮凝剂。最佳操作条件为絮凝剂K6728投加量2．5ml；搅拌水平150r／min 10s，50r／min 10min；过滤压力0．03MPa。综合分析得出最佳工艺参数为：K6728絮凝剂投加量2．0ml；搅拌水平150r／min 10s，50r／min 10min；过滤压力0．03MPa。此时，污泥脱水效果最佳。[结论]优化了石化污泥脱水工艺。  相似文献   

不同脱水程序在乙型病毒性肝炎患者肝穿刺组织中应用的比较     

曾敏 《农业环境科学学报》2013,1(5):608-609

目的 探讨乙型病毒性肝炎患者肝穿刺组织最合适的快速石蜡脱水程序.方法 随机选取乙型病毒性肝炎肝穿刺标本50例,每一例穿刺标本随机取三份新鲜组织,取材固定后,分为三组,A组为快速石蜡处理3 min组、B组为快速石蜡处理5 min组、C组为快速石蜡处理10 min组.快速石蜡切片应用超声波技术结合水浴加温及应用BT生物组织透明剂代替二甲苯作为透明剂.三组所做切片同时进行HE染色.结果 快速石蜡处理3 min组所制的片优良率为0%,快速石蜡处理5 min组、10 min组所制的片优良率为100%,χ2=150,P〈0.001,三组的优良率差异有统计学意义.结论 应用JYCL-2 超声组织处理仪＋BT 生物组织透明剂处理肝组织5-10 min就能满足肝组织快速临床病理诊断的需要,缩短了发报告的时间,同时也符合实验室环保的要求.  相似文献   

不同工艺方法对鱿鱼热风干燥效果的影响     

马先英  赵世明  牟晨晓 《水产科学》2007,26(2):106-108

采用热风干燥技术对鱿鱼胴体进行了2组不同工艺方法的试验研究,对2种试验结果进行了对比分析。结果表明,不同干燥工艺方法对鱿鱼干燥效果产生显著影响。采用第2组试验方案进行干燥,可以明显改善干燥中存在的干燥速度不一致、干燥不均匀问题;与第1组试验方案相比缩短干燥时间约2 h,制品的质量也明显提高。  相似文献   

玉米自交系籽粒灌浆和脱水速率的配合力分析评价   总被引：1，自引：0，他引：1  

王巍 《黑龙江农业科学》2014,(8):1-5

为选育籽粒灌浆和脱水速率高的品种,选用9份K10改良自交系,按格列芬双列杂交方法Ⅳ设计,对自交系籽粒灌浆速率、脱水速率、穗轴脱水速率及苞叶脱水速率配合力进行分析。结果表明:用9份自交系的配合力自交系间有较大差异。自交系4、自交系3籽粒灌浆速率、脱水速率的一般配合力均较高;自交系8籽粒灌浆速率一般配合力较高,脱水速率一般配合力居中;自交系9籽粒灌浆速率一般配合力较低,脱水速率一般配合力较高;自交系2、1、7籽粒灌浆、脱水速率一般配合力均较低。用来改良K10的9份材料中,国外杂交种和欧洲群体改良灌浆脱水性状的效果较好,丹598、丹340、瑞德群体、郑58不理想。  相似文献   

Effect of shrimp head protein hydrolysates on the state of water and denaturation of fish myofibrils during dehydration   总被引：1，自引：0，他引：1  

Yaowalux?Ruttanapornvareesakul  Misako?Ikeda  Kenji?HaraEmail author  Kazufumi?Osako  Orawan?Kongpun  Yukinori?Nozaki 《Fisheries Science》2005,71(1):220-228

ABSTRACT:   To utilize fisheries waste products as food materials with functional properties, shrimp head protein hydrolysates (SHPH) from three species of shrimp, that is, Northern pink shrimp ( Pandalus eous ), Endeavour shrimp ( Metapenaeus endeavouri ) and Black tiger shrimp ( Penaeus monodon ), were produced by enzymatic hydrolysis using endopeptidase derived from Bacillus subtilis and exopeptidase derived from Aspergillus oryzae at a level of 0.1% (w/w). SHPH were rich in protein (90–91%) and amino acids (71–84%) but little fat (0.01–0.02%). The average molecular weight of SHPH was 300–1400. The effect of 5% SHPH (dry basis) addition on the state of water and denaturation of lizard fish myofibrils (Mf) during the dehydration process was evaluated by the desorption isotherm and the Ca-ATPase activity, and compared with the effect of sodium glutamate (Na-Glu). SHPH decreased the water activity and the Ca-ATPase inactivation, and increased monolayer sorbed water and multilayer sorbed water of Mf, although these effects of SHPH were smaller than those of Na-Glu. These findings suggest that the SHPH suppressed dehydration-induced denaturation of myofibrillar protein by stabilizing the hydrated water surrounding myofibrils.  相似文献   

气象因子对黄淮海区粒收玉米子粒灌浆与脱水特性的影响     

闫丽慧  王昌亮  常建智  王芬霞  李彦昌  王海亮  艾振光 《玉米科学》2022,30(6):78-84,92

以宜子粒收获玉米品种“浚单1668”为材料,2018～2020年在鹤壁开展子粒灌浆试验,分析子粒灌浆及脱水特性,探讨粒重、子粒灌浆参数和子粒脱水速率与气象因子之间的关系,揭示宜子粒收获玉米产量形成机制。结果表明,不同年份间玉米子粒产量、百粒重和收获时含水率差异显著。玉米产量的差异主要由粒重引起,粒重与灌浆速率显著正相关,与灌浆时间相关性不显著;日照时数和有效积温是影响灌浆速率和粒重的主要气象因子,日照时数和日温差是影响脱水速率的主要气象因子。结果还表明,子粒收获玉米浚单1668吐丝后积温达到769.1～905.0℃·d时,玉米子粒生理成熟,生理成熟时子粒含水量20.67%～25.33%。黄淮海区域玉米生产过程中,通过适时早播,增加吐丝后日照时数和有效积温,玉米获得最大粒重和产量的同时,可有效降低子粒收获时含水量。  相似文献   

骟树原理与推论     

王俊杰  孟少童 《甘肃林业科技》2014,(1):1-10

介绍总结了骟树伐木技术及其优点、起源和文化内涵,该技术仅存在于甘肃省陇南市武都区角弓乡一带,属民间技术,富有地方特色。结合植物解剖学、生理学等知识,分析提出栈糖渠模型,系统解释了骟树伐木原理,并推广应用该模型解释了一些树木学现象,进而改进该模型分析植物,描绘出一幅粗线条的植物进化路线图。  相似文献