Performance Evaluation of the ADS 1000 Ventilator Using a Lung Model     

L.S. Faudskar DVM  M. R. Raffe DVM  MS  D. A. Randall BS  D. R. Bing BS  RRT 《Journal of Veterinary Emergency and Critical Care》1997,7(1):49-58

A laboratory evaluation was performed to evaluate the performance characteristics of a new veterinary ventilator. The ventilator studied was configured according to manufacturer's directions and attached to a test lung via a pneumotachograph and differential pressure transducer interfaced to a pulmonary mechanics analyzer system. Constant resistance (R=10 cm H₂O/L/sec) and compliance (C=3 ml/cm H₂O) factors were maintained for all trials. The ventilator operated at the manufacturer's preprogrammed parameters. In the first trial, body weight was the only variable. In the second trial, an endotracheal tube was placed in series between the ventilator's breathing circuit and the pneumotachograph. Body weights from 1–20 kgs were evaluated. Mean values for respiratory rate (RR), minute ventilation (VE), inspiratory time (Ti), peak inspiratory pressure (PIP), and peak inspiratory flow (Fpki) displayed on the ventilator control panel; tidal volume (VT), calculated from the displayed minute volume, and identical parameters measured by the pulmonary mechanics system at each body weight, were compared using a two factor analysis of variance. Significant differences (P< 0.05) were found between mean displayed and measured values for RR, PIP, and Fpki.  相似文献   

赖氨酸修饰对梯棱羊肚菌黑色素结构和理化特性的影响     

常明昌  曹群珞  刘文婷  许亚萍  徐丽靖  孟俊龙  冯翠萍  程艳芬  耿雪冉 《农业工程学报》2024,40(5):297-306

为了进一步提高梯棱羊肚菌黑色素的提取率及溶解性,本试验采用单因素、Plackett-Burman试验、响应面试验对纤维素酶-超声波协同提取梯棱羊肚菌黑色素的提取工艺进行优化研究。通过赖氨酸修饰,并对修饰前后的梯棱羊肚菌黑色素进行结构表征、理化性质及稳定性研究。结果表明,在NaOH浓度为1.54 mol/L,纤维素酶添加量为20 mg/g,纤维素酶酶解时间为78.6 min,料液比为1:30,酶解温度为40 ℃,超声时间为80 min条件下提取的梯棱羊肚菌黑色素最优。未修饰的梯棱羊肚菌黑色素不溶于水,色价值为480.24,修饰后的黑色素溶解度为1 016 g/L,色价值为1 771.18,比未修饰的黑色素在溶解性、色价值方面均有所提高。此外,在不同的温度、光照、pH条件下,修饰前后的梯棱羊肚菌黑色素均比较稳定。以上研究结果为梯棱羊肚菌黑色素的高效提取及其产品的开发利用奠定了理论基础。  相似文献   

影响套袋梨果面光洁度的因素及防止措施   总被引：1，自引：0，他引：1  

孟繁佳 《落叶果树》2005,37(3):58-58

近年来，我市栽培的黄金、大果水晶、新世纪、金二十世纪、绿宝石等梨品种，果实普遍套袋。但果实出现果锈、皲皮、裂口、黑斑、黑点等现象，影响了果面光洁度，降低了商品率，制约了出口，造成很大损失。为究其原因，笔者进行了调查，明确了影响果面光洁度的因素，并采取了相应的措施，使优质果率由原来的78％提高到89％。  相似文献   

软籽石榴新品种‘红玉石籽’   总被引：1，自引：0，他引：1  

朱立武  张水明  巩雪梅  贾兵  李绍稳  李瑶 《园艺学报》2005,32(5):965-965

 ‘红玉石籽’是从‘玉石籽’营养系变异中选育出的石榴新品种。果皮全面着色, 平均单果质量、百粒质量、可溶性固形物含量和出汁率分别比对照品种‘玉石籽’提高33.4%、16.8%、2.7%和3.0%。软籽, 核硬度3.31 kg/ cm²。植株抗褐斑病、干腐病, 丰产, 皖中地区9月中下旬果实成熟。  相似文献   

嫁接西瓜肥料试验初报     

姚莉英  林天杰  邵彬 《中国瓜菜》2005,(1):13-14

试验结果表明,在土壤有机质含量高达4.07%的单栋钢管大棚中,进行嫁接西瓜栽培时,与常规施肥量相比,在4个减肥处理中,以减量20%的处理增产优质效果最佳。  相似文献   

不同砧木嫁接网纹甜瓜试验     

王毓洪  李林章  黄芸萍  孟秋峰  邵必丰  王祥兆  何智龙 《中国瓜菜》2005,(6):25-27

为预防网纹甜瓜枯萎病等土传病害,以新土佐、灰甘瓜、全能铁甲南瓜,甬砧3号甜瓜为砧木,以当地主栽的拿玻里网纹甜瓜为接穗,进行嫁接试验。结果表明:拿玻里网纹甜瓜嫁接后,植株的抗病性有了显著提高,对枯萎病的防效高达100%,对白粉病的防效也有所提高,综合抗性增强。其中甬砧3号在4个参试砧木品种中,与接穗拿玻里网纹甜瓜的亲和性最好,抗病性提高明显,品质也较自根苗好。  相似文献   

宜吉共建黄河壶口瀑布旅游风景名胜区的合作方案研究   总被引：2，自引：0，他引：2  

孟彩萍  杨万福 《干旱区资源与环境》2003,17(4):66-70

黄河壶口瀑布旅游风景名胜区由于地跨晋陕两省,长期以来以行政为单元进行独立开发的模式制约了景区的发展。本文在认真分析了现行的开发模式和三种可供选择的方案之后,提出了一种可行的创新方案。  相似文献   

泥炭资源的基本属性、理化性质和开发利用方向   总被引：11，自引：0，他引：11  

刘永和  孟宪民  王忠强 《干旱区资源与环境》2003,17(2):18-18

本文探讨了泥炭资源的资源学属性,总结了泥炭资源的基本理化性质和各种泥炭 资源的开发利用方向对泥炭资源性质的要求。  相似文献   

Study on relationship between expression of PKCα in glomeruli and development of nephropathy in diabetic rats     

JIA Zhong-hui  ZHANG Guo-zhong  GUO Bing  GUI Hua-zhen  WAN Chang-wu 《园艺学报》2003,19(9):1238-1241

AIM:To observe the dynamic changes of expression of PKCα, TGF-β₁ and α-SMA in glomeruli of diabetic rats induced by the alloxon and to invesitigate their roles in the diabetic nephropathy(DN).METHODS:Rats were randomly divided into four groups: normal control group (group A), diabetic group of one week (group B), diabetic group of one month (group C), diabetic group of two months (group D). Immunohistochemistry and Western blotting were used to detect the expression of PKCα, TGF-β₁ and α-SMA in renal tissue of all groups. Blood glucose, triglycerides, cholesterol, creatinine and urine protein were analysed by chemical methods. The morphological changes of renal tissue were checked through microscopy.RESULTS:The expression of PKCα and TGF-β₁ in renal tissue of diabetic groups were increased comparing with those of nomal control group(P<0.05). The mesangial cells expressed α-SMA in two months group. Chronologically the expression of PKCα, TGF-β₁ and α-SMA were positively correlative with each other and the impairment of kidney was also observed.CONCLUSIONS: During the DN process the expression of PKCα increased. PKCα raised GFR and the permeability of glomerular filtration membrane which enhanced urinary albumin excretion. PKCα also increased expression of TGF-β and therefore to induce the expression of α-SMA. The appearance of α-SMA was a marker of the phenotypic transform of renal cells.  相似文献   

1-(1-苯基-1,2,4-三氮唑-3-氧代乙酰氧基)烃基膦酸酯的合成与植物生长调节活性   总被引：1，自引：0，他引：1  

贺红武  孟利平  胡利明  刘钊杰 《农药学学报》2002,4(3):14-18

合成了一系列新的1-(1-苯基-1, 2, 4-三氮唑-3-氧代乙酰氧基) 烃基膦酸酯, 并测定了它们对小麦和黄瓜的植物生长调节活性。结果表明, 在100 Lg/g 时, 所有化合物对小麦芽鞘的生长具有抑制作用, 而在10 Lg/g时化合物6a、6g 对黄瓜显示了较高的促生长活性。  相似文献