Water hardness是什么意思

网络释义

用法例句

A study of applying modified soybean hull in decreasing water hardness;

改性大豆皮用于降低水硬度的研究

The relation between the property and type of dampening solution and dilute water hardness is introduced, property index (such as pH value, specific conductivity, and surface tension)of dampening solution formulated with water with various hardness is tested through experiment.

概述平版胶印润版液的种类、性能及与稀释用水硬度的关系,并通过实验检测了以不同硬度水配制的润版液的pH值、电导率、表面张力等性能指标,指出水硬度与电导率的关系最密切,应通过检测电导率来控制和监测润版液的性能变化;配制润版液的水硬度为8°,最高不得超过12°。

This experiment was designed to determine the effect of water hardness on the acute toxicity of copper for fry of grass carp(Ctenopharyngodon idellus),silver carp(Hypophthalnichtys molitrix)and loach (Misgournus mizolepis).

实验以草鱼、鲢和大鳞泥鳅的鱼苗为材料,测定了水硬度对铜的急性毒性的影响,水硬度在255、141、37和14mg/L(以 CaCO_3计)时铜对草鱼的48小时 LC_(50)分别是519、354、91和76μg/L,96小时 LC_(50)则分别为460、307、67和39μg/L。

A new method to determine the hardness of water by xylend orange indication under the (existence) of the cationic surface active agents is reported.

研究了在阳离子表面活性剂存在下,以二甲酚橙为指示剂测定水硬度的新方法,该方法终点颜色变化敏锐,结果令人满意。

This paper deals with the best experimebtal condition of the determinationof the hardness of water by spectrophotometry with Methyl Thymol Blue Complexon(MTB) as chlorophosphosphonsazo, and the concrete formula of Lambert-Beer's Law inthe mixed system of Ca-MTB is calculated.

研究了以甲基百里香酚兰络合剂（ＭＩＢ）为显色剂，用分光光度法测定水硬度的最佳试验条件，导出了朗伯─比尔定律在Ｃａ—ＭＴＢ与Ｍｇ—ＭＴＢ二元混合体系中的具体形式。

The Synthesis of a New Chromogentic Reagent Dibromo-o-Carboxychlorophosphonazo and its Application for the Determination of Hardness of Water and Calcium of Magnesium in Water;

新显色剂二溴邻羧基偶氮氯膦的合成及其应用于测定水的硬度和钙镁含量

Effect of hardness of water on the expansion rate of sea cucumber

水的硬度对海参涨发率的影响

The Determination of the Water Hardness of Different Source by the Coordination Titration;

配位滴定法测定不同来源水的硬度

The influence of water hardness on the hematite reverses flotation

水的硬度对赤铁矿反浮选的影响

We make the experiment of coordination titration for the ditermination of water hardness.

本文作者在教学实践中 ,通过做“水的硬度的测定”配位滴定等实验 ,使学生逐步学会分析、探索和解决化学实验中的问题 ,培养科学思维的方法。

Secondary softening of high hardness water and its actual application;

高硬度水的二级软化与实际应用

Furthermore,it was discussed that the Ca2+ and Mg2+ in the high hardness water from Shanxi interfered with s.

讨论了此条件下,山西区域内高硬度水质中Ca2+、Mg2+离子对上述6种离子同时测定的影响。

The degree of hardness or the water hardness you will get to know from your responsible waterwork.

水质硬度可以通过水质测试仪测得，上述水硬度单位为德国度。

Grey prediction of data sequence of the hardness in shallow groundwater in Luoyang

洛阳市浅层地下水硬度的灰色数列预测

Development and Application on Equipment to Reduce Mine Water Hardness with Lime Method

石灰法降低矿井水硬度设备的研制与应用

This process removes the water hardness.

这一工艺去除水的硬度。

Measuring total hardness of water by flow injection spectrophotometry

流动注射分光光度法测定水的总硬度

Methods for analysis of water for boiler and for cooling--The determination of hardness--Low hardness

GB/T6909.2-1986锅炉用水和冷却水分析方法硬度的测定低硬度

Methods for analysis of water for boiler and for cooling--The determination of hardness--High hardness

GB/T6909.1-1986锅炉用水和冷却水分析方法硬度的测定高硬度

surface active agents-preparation of water with known calcium hardness

表面活性剂－已知钙硬度水的制备

Study on determination method of the trace hardness in feed water used for the boiler

锅炉用水中微量硬度的测定方法研究

Hydration, Hardening and Compressive Strength of Class G Oil Well Cemnet under High Temperature;

高温下G级油井水泥的水化硬化与强度

The effect of the water alkalinity and the water hardness on noodle quality was reviewed.

研究了水的碱度、硬度对面条品质的影响。

Experimental Study on Sulfate and Haroness Removal from Mine Waste Water with High Degree of Mineralization;

高矿化度矿井水硫酸盐、总硬度去除的实验研究

Uncertainty Evaluation of Determining Water Hardness by EDTA Titration

EDTA滴定法测定水中硬度的不确定度评定

Analysis on the Change of Groundwater Salinity and Hardness in Hutuohe Plain

滹沱河平原地下水矿化度和硬度变化分析

Evaluation of Uncertainty for Determination of Total Hardness in Water by EDTA Titration

EDTA滴定法测定水中总硬度的不确定度评定

hydraulic cement [mortar]

水硬水泥 [灰泥]

a substance that lessens the hardness of water giving it more efficient sudsing.

降低水的硬度、使之更容易起泡沫的物质。

Treatment of hepatic cirrhosis and ascites with RNA

核糖核酸治疗肝硬变重度腹水临床疗效观察