In sensitive regions receiving acid deposition, waters are often acidic and Al-rich, this makes the lakes and streams serious acidification and fisheries loss.
在酸沉降敏感地区水体酸化和铝离子富集造成湖泊和河流严重酸化及鱼类大量损失。
The paper introduces the application of chromic flotsam natrium bisulfate in the course of neutralization and pre acidification in industry of chromic acid anhydride.
介绍铬酸酐生产中，含铬硫酸氢钠废料用于前工段中和、预酸化。
The oil production draw on from improved reservoir was determined by whether the acid formulation used for acidification improvement of reservoir is reasonable.
对油气田进行酸化改造的酸配方是否合理，是决定被改造油层能否增产的关键所在。
Soil acidification may. become a serious problem in Changsha because of long-term serious acid deposition.
由于长期严重的酸沉降，长沙地区的土壤酸化可能成为一个严重的环境问题。
Raw materials, compound, casting, maintenance and acidification in the construction of high density acid proof concrete are described.
详细介绍了密实性耐酸混凝土的原材料、配制过程、浇注、养护及酸化处理等。
The acid deposition critical loads for 80 surface waters in southern China were calculated using a dynamic acidification model-MAGIC.
研究了酸沉降对中国南方地表水体的影响。应用动态酸化模型MAGIC，计算了中国南方80个地表水体的酸沉降临界负荷。
Preparation method of 2,3,4-trimethoxybenzoic acid is introduced, which was synthesized from 2,3,4-trihydroxybenzoic acid by methylation, hydrolysis, acidification and purification.
研究以焦性没食子酸衍生物2，3，4-三羟基苯甲酸为原料经过甲基化、水解、酸化和精制成2，3，4-三甲氧基苯甲酸。
Acid rain damage to forests, acidification of lakes and threaten the biological.
酸雨能毁坏森林，酸化湖泊，危及生物等。
Based on the principle of reaction crystallization, a new technology of direct crystallization of boric acid from the brine of salt lake by acidification at room temperature.
利用反应结晶原理，研究了室温酸化盐湖卤水直接结晶硼酸的新工艺。
The crude rice bran oil with high acid value should be refined with physical refining, including degumming, bleaching, de-acidification, dewaxing, defatting.
米糠浸出所得到的毛糠油为一种高酸值毛油，采用物理精炼工艺在提高油脂精炼率和经济效益方面具有明显的优势。
Methods:Starting from 2-p-tolylben-zonitrile, via basic hydrolysis and acidification, 2-p-tolylbenzoic acid was prepared. Results:The optimal hydrolysis conditions were established.
方法：以2-对甲苯基苯甲腈为原料，经碱性水解和酸化反应制备2-对甲苯基苯甲酸，并对水解反应条件进行探究。
The acid deposits have not only directly affected on tree growth but also indirectly through the acidification of forest soil which is probably one of the facts that cause forest decline.
酸性沉降不仅对林木生长产生直接影响，而且通过土壤还对林木产生间接影响。
Leaching of simulated acid rain into the soils causes soil acidification and release of base ions.
通过模拟酸雨淋洗土壤，造成了土壤酸化和盐基流失。
The present paper is a review of the new progress of study on forest decline due to soil acidification from acid rain.
本文主要综述酸雨通过土壤酸化导致森林衰亡方面的国外最新研究进展。
The effects of catalyst dosage, and the catalyst preparation conditions such as concentration of sulphuric acid, acidification time, acidification temperature, etc.
考察了催化剂用量，催化剂制备条件中硫酸质量分数、酸化时间、酸化温度等对催化性能的影响。
The use of organic acid-modified chitosan, and use of cross-linked chitosan prepared by acidification of the carrier, and then modified chitosan immobilized laccase.
利用有机酸改性壳聚糖和交联法制备酸化壳聚糖载体，然后用改性壳聚糖载体固定漆酶。
Magnesium hydroxide that was of nanometer level and flake shape and had uniform particle size was synthesized by calcination and hydrochloric acid-acidification and with magnesite as raw material.
以菱镁矿为原料，经煅烧、盐酸酸化后与氢氧化钠反应合成了纳米级、片状、粒度均匀的氢氧化镁。
Magnesium hydroxide that was of nanometer level and flake shape and had uniform particle size was synthesized by calcination and hydrochloric acid-acidification and with magnesite as raw material.
以菱镁矿为原料，经煅烧、盐酸酸化后与氢氧化钠反应合成了纳米级、片状、粒度均匀的氢氧化镁。
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