Water diffusion in biological porous systems: a NMR approach

The spin-echo nuclear magnetic resonance (NMR) technique together with paramagnetic ion doping are used to study structural parameters of plant samples, such as restricted dimensions, and cell interconnection both through membranes and by cell contact by studying simultaneous restricted diffusion and intercellular water transfer via various pathways. Also, peculiarities of water diffusion on the surface of cell-wall cellulose are studied over a wide range of water content.     

Body weight estimation of elderly patients by nomogram

OBJECTIVE: To determine a safe and easy way to estimate body weight (BW) accurately in nonambulant elderly patients. DESIGN: An anthropometric study of ambulant patients. PARTICIPANTS: Two hundred eleven ambulant inpatients, 108 males and 103 females. SETTING: Inpatient departments of the University Department of Geriatric Medicine, Cardiff, Wales, UK. MEASUREMENTS: Skinfold thickness of chin, triceps, forearm, wrist, subscapular, sternal angle, waist, suprailiac, knee, and calf; circumference of arm, forearm, thigh and calf; body weight, chest girth, abdominal girth, upper limb length, leg length, and body weight. Measurements were carried out by means of Harpenden Skin-Fold Caliper, tape measure, and bathroom scale. RESULTS: Measured body weight in males was highly correlated with both arm circumference and chest girth. In females, measured body weight was highly correlated with waist skinfold thickness and thigh circumference. Nomograms for weight estimation in males and females were constructed from the regression equations for these measurements. CONCLUSIONS: Convenient estimation of body weight in nonambulant patients may be carried out using nomograms, which, themselves, may be used as progress sheets to assess the effect of dietary supplementation on body weight.     

普通快走丝线切割机脉冲电源常见电路简介

通过实例对脉冲发生、预放（驱动）、功放电路进行了简要分析。     

YQZF-Ⅱ型油气组分评价仪应用效果研究

该文在介绍YQZF-Ⅱ油气组分综合评价仪的工作原理及分析条件的基础上，从色谱分析的角度，建立了油气组分综合评价仪的分析方法及油气组分综合评价仪资料的油水层识别定性解释方法。统计了卫星-太东、新肇、英台、海拉尔地区已试油的38口井83层的色谱资料，单项解释符合率在80％以上。在大庆地区应用效果较好。对该技术在录井行业中的推广有一定的积极作用。     

地化录井综合解释评价方法在尚家区块开发井的应用

尚家区块扶杨油层断层较发育,油藏类型复杂,加之近年来探井少．给开发井油水层的识别带来一定的困难。针对这一情况,在应用岩心、岩屑、井壁取心这些传统录井方法的基础上,结合岩石热解分析、气相色谱、显微荧光图像分析等地化录井分析技术．在油水层识别方面建立了St与S1／S2和R1与S1关系图板,形成了储集层流体性质的地化综合评价方法,使该区块的解释符合率提高了20％,为试油方案的确定起到一定的指导作用,同时也对老井的重新认识提供了依据.     

MiniRanger Plus流量计及其应用

本文阐述了MiniRanger Plus流量计的工作原理、特点及其几个方面的应用.