Canine fetal echocardiography: correlations for the analysis of cardiac dimensions     

Amália Turner Giannico  Elaine Mayumi Ueno Gil  Daniela Aparecida Ayres Garcia  Marlos Gonçalves Sousa  Tilde Rodrigues Froes 《Veterinary research communications》2016,40(1):11-19

The aim of this study was to develop regression models for correlation of canine fetal heart development with body size to characterize normal development or suggest cardiac anomalies. Twenty clinically healthy pregnant bitches, either brachycephalic and non-brachycephalic, were examined ultrasonographically. Transabdominal fetal echocardiography was conducted every 4 days from the beginning of cardiac chambers differentiation until parturition. Ten cardiac parameters were measured: length, width and diameter of the heart; heart area; left and right ventricular dimensions; left and right atrial dimensions; and aortic and pulmonary artery diameter. Femoral length, biparietal diameter and abdominal cross-sectional area were also recorded. Regression equations were developed for each parameter of fetal body size, and linear and logarithmic models were compared. The model with the highest correlation coefficient was chosen to produce equations to calculate relative dimensions based on the correlations. Only the left-ventricular chamber differed between the two racial groups. Biparietal diameter was the independent parameter that produced the highest correlation coefficient for the most fetal cardiac dimensions, although good correlations were also observed using femoral length and abdominal cross-sectional area. Heart width and heart diameter were used as surrogates of cardiac development, as these measurements showed the best statistical correlation. Quantitative evaluation of fetal cardiac structures can be used to monitor normal and abnormal cardiac development.  相似文献   

First report of Seville root-knot nematode (Meloidogyne hispanica) infecting tobacco in the Brazil     

de Ramos  Eduarda Kalena Kirsch  Pazdiora  Paulo Cesar  Dallagnol  Leandro José  de Souza  Mayara Rodrigues  de Araujo Filho  Jeronimo Vieira 《植物病害和植物保护杂志》2023,130(1):211-214

Journal of Plant Diseases and Protection - Tobacco (Nicotiana tabacum L.) is one of the major nonfood crops in the Southern of Brazil. During 2019/2020 and 2020/2021 crop seasons, Root Knot...  相似文献   

Canine squamous cell carcinoma: Electrochemotherapy association with surgery and correlation with overall survival     

Rúbia Monteiro de Castro Cunha  Gleidice Eunice Lavalle  Fernanda Camargo Nunes  Ayisa Rodrigues de Oliveira  Renato de Lima Santos  Roberto Baracat de Araújo 《Veterinary and comparative oncology》2023,21(2):240-254

Squamous cell carcinoma (SCC) is an important malignancy in dogs, due to its incidence and clinical presentation, which can be of locally aggressive single or multiple lesions with a metastatic potential. The objective of this investigation was to evaluate SCC response to treatment, anatomopathological and immunohistochemical characteristics, disease-free interval and overall survival time. 54 dogs with histopathologically diagnosed SCC were included in this study. Their mean age was 9.16 years with a range of 1–14 years. Of the 54 animals in the study, 34 (65.4%) had white skin and white fur coats. There was a significant correlation between fur coat colour and the development of tumours in areas of sun exposure (p = .001). Animals with tumours in areas of the body exposed to the sun had longer overall survival time than animals with tumours in areas not associated with sun exposure (p = .001). Surgery combined with electrochemotherapy (ECT) yielded a survival rate 32% higher than using a surgical approach alone (HR = 0.32, p = .038, IC = 0.11–0.94). ECT, with or without surgery, had an objective response rate of 90.9%. Local lymph node and/or distant site metastasis at diagnosis, or at some point during follow-up, occurred in 34.6% (18/52) of animals. Animals with tumours in sun exposed locations had more aggressive histopathological characteristics but had longer overall survival time. This is probably due to individualised therapeutic treatment with both surgery and ECT.  相似文献   

Design for Precision Measurement System Based on Machine Vision     

LIAO Qiang  MI Lin  ZHOU Yi  XU Zhong jun 《保鲜与加工》2002,(12):21-23

It is difficult to measure the geometric quantity of small parts in finishing, assembling and measuring, because it's easy to break the workpieces' surface and alter their position by means of traditional contact measuring methods.There are some non contact measurers, such as,light feeler pin and interference microscope etc., because of it's high price and strict working conditions,so it's difficult to promote them in widely use. Precision measurement system based on machine vision has the advantages of non contact measuring as well as high performance and low price. Some problems, such as light source, algorithm of edge fitting, auto focusing,are discussed.  相似文献   

跌水坎流体动力性噪声模拟试验研     

张云清  郭维东  宓永宁  王再兴  王璞东 《中国农村水利水电》2006,(8):82-84

以流体声学相似原理为依据，对三种跌水坎形式进行噪声模拟试验。利用古典声学理论对背景噪声进行分析与修正，评估降噪的效果，确定跌水坎的修改形式。并对修改方案进行不同比尺的试验，对声强进行曲线拟合，绘制趋势线，推求原型噪声的大小，为工程建设提供参考依据。  相似文献   

液压节能技术的应用与发展   总被引：11，自引：0，他引：11  

徐鹏  米伯林  李杞超 《农机化研究》2006,(9):206-207,211

节约能源已经成为当今社会的主流问题，对于液压技术领域中的液压节能技术的探讨也逐渐提到议事日程。为此，主要介绍了几种节能液压元件和典型的节能液压系统的应用状况，并对液压回路的节能发展趋势进行了阐述，为更好地利用能源提供了参考。  相似文献   

拖拉机液压提升能力试验加载方案的对比研究     

栾圣罡  米伯林 《农机化研究》2002,(4):68-69

综述了国内外拖拉机液压提升能力试验的几种加载方案，并就其优缺点进行了探讨，给出了一种适于基层单位进行液压提升器检测维修的经济型方案。  相似文献   

循环冷却水系统生物粘泥的控制—   总被引：1，自引：0，他引：1  

邵青  米晓 《中国农村水利水电》2006,(6):54-56

首先提出用涂刷抗菌藻涂料来控制循环冷却水系统的生物粘泥的方法。然后针对敞开式电厂循环冷却水系统的水质特点，将自行筛选复配的高效抗菌灭藻剂配方FB－1、FB－2添加到所选涂料中进行配比试验，最终得到了抗菌藻涂料配方TUB，静态试验表明TUB效果显著，具有极广的应用价值。  相似文献   

一种新式护坡——模压混凝土砌块护坡     

张玉清宓永宁  诸葛妃庞海臻 徐锋 《农业机械化与电气化》2007,(6):43-45

在对传统护坡型式缺陷进行分析的基础上,介绍了一种新式护坡—模压混凝土砌块护坡,通过对其生产工艺、施工工艺以及优点等方面的阐述,说明该护坡系统有良好应用前景。  相似文献   

复配基质对戈壁日光温室番茄果实品质及产量的影响     

李波  米兴旺  何萌  王学强  钱宝玲 《北方园艺》2021,(8):64-70

以“金抗1号”番茄为试材,采用槽式栽培,利用腐熟的玉米芯、作物秸秆、牛粪、河沙、蛭石组成7种栽培基质配方,以酒泉生产应用的商品基质为对照,研究了不同基质配方对温室番茄生长、产量、品质的影响,并对基质栽培前后的理化性质进行了分析,旨在为番茄有机基质栽培提供技术支撑.结果 表明:1)在番茄整个生育期间,各处理的pH和EC值均有所变化,但其变动值始终没有超出番茄生长所需的范围;不同配比基质在栽培前各理化性状均在番茄正常生长的理想范围之内.2)通过对番茄株高、茎粗的比较得出,定植后的整个生育期内,配方T6、T2的栽培效果较好,株高、茎粗均显著高于其它处理,植株健壮.3)不同配比基质对番茄产量及品质有较大的影响,T6、T2的667 m2番茄产量均达到7 600 kg以上,与CK相比,超出CK产量的21.58％～24.54％,单果质量较CK高23.07％～23.87％;与CK相比,T6、T2的综合效果最好,显著提高果实维生素C、可溶性糖含量,有机酸含量较高,糖酸比适宜.综上,T6、T2配方栽培下的番茄植株长势良好,果实品质佳,且基质原料丰富易得,成本适宜,可以在酒泉地区非耕地番茄基质栽培中推广应用.  相似文献