The article presents a simultaneous determination method for three kinds of water-soluble dyes: acid red, acid brown and acid black by solving simultaneous equations using a UV-VIS spectrophotometer.
介绍了利用解联立方程组的方法，在紫外可见分光光度计上实现了对酸性红、酸性棕和酸性黑的混合染料中三种成分浓度的同时测定。
Since 2007, frequent acid rain showers caused by activity at the volcano killed or damaged much of the vegetation to the southwest of the summit, leaving the area brown and orange.
2007年以来由于火山的活动，频繁降下的酸雨破坏了山顶西南部大片植被，并致其死亡，因此在照片上呈现棕色和橘色。
It mainly grows on yellow soils, acid purplish soils and parts of yellow brown soils.
主要生长在黄壤和酸性紫色土上，黄棕壤上与有分布。
The characteristics of acid leaching of brown soil and cinnamon soil were studied using an indoor soil column leaching method with simulated acid rain.
用室内模拟淋洗土柱的方法，对棕壤和褐土的酸淋容特征进行了研究。
When nitric acid is poured on copper, a brown vapor gives off.
将硝酸倒在铜上，会散发出一种棕色的蒸气。
In order to obtain rust, brown, gun-black and ancient green films on brass at room temperature, the chemical coloring process on brass in acid solution was studied.
为了在黄铜基材上室温下获得铁锈色、棕色、枪黑色、仿古绿色膜层，研究了黄铜酸性化学着色工艺。
In a laboratory incubation experiment, timing change in amount of humic acid(HA) and fulvic acid(FA) was studied in dark-brown soil and paddy soil during corn stalk decomposition.
通过室内培养试验研究了玉米秸秆在暗棕壤和水稻土中分解期间全土及不同结合态胡敏酸、富里酸数量的动态变化。
The poplar growth and soil enzymatic activity was studied as affected by humic acid fertilizer (NHA), which was made by activated brown coal.
利用活化后褐煤腐殖酸为吸附基质制成缓效肥料(NHA)，研究了其对盆栽杨树生长、土壤酶及理化性质的影响。
The moisture, ash, total humic acid and free humic acid of the brown coal were analyzed.
对褐煤水分、灰分、总腐植酸、游离腐植酸、进行了分析和评价。
The fatty acid value of the brown rice is higher than that of the standard first grade rice, but the taste score is on the contrary.
研究表明，糙米状态下的脂肪酸值比标准一等精度大米状态下的高，品尝评分值则相反。
In this case, brass pins are dark red/brown because of NO2 fumes released when concentrated nitric acid contacted the brass components.
这里，因为受到浓缩硝酸所释放的二氧化氮的腐蚀，使得黄铜珠子变成深红棕色。
Nitric acid is sulfuric acid and hydrochloric acid small, easily soluble in water, in the water under the ionization completely colorless transparent, strong dilute solution show brown solution.
硝酸的酸性较硫酸和盐酸小，易溶于水，在水中完全电离，常温下其稀溶液无色透明，浓溶液显棕色。
This product is dark brown liquid. Have the acetic acid and coal tar.
本品为深褐色液体；有醋酸及煤焦油的特臭。
Nitric acid is not stable, easy to see light decomposition, should be in brown bottle in the shadows to avoid light preservation.
硝酸不稳定，易见光分解，应在棕色瓶中于阴暗处避光保存。
INGREDIENTS: pure polar deep-sea water desalination Haiquan essence, Marine fennel, brown algae, deep-sea pearl extract, amino acid moisturizing agents.
主要成份：纯净极地深海水、脱盐海泉精华、海洋茴香、褐藻、深海珍珠提取物、氨基酸保湿剂。
It is not dissolved in ethanol without water, acetone, aether and grease. It is red in acid, reddish brown in neutral and dark red-brown in alkaline.
在酸性水溶液中呈透明的鲜艳红色，在中性水溶液中呈红棕色，在碱性水溶液中呈透明的深红棕色。
The crude protein contents and amino acid composition of the brown rice from 8 cultivars of early paddy mainly planted in Hubei province were analyzed.
分析了湖北省8个主要早稻品种糙米的蛋白质含量和氨基酸组成。
Effect of genera carboxylic acid on urease, ammonification, nitrification of brown soil was studied through an indoor incubated test.
文章通过室内培养实验，研究了类羧酸对棕壤中与氮素转化有关的生物活性的影响。
Effect of genera carboxylic acid on urease, ammonification, nitrification of brown soil was studied through an indoor incubated test.
文章通过室内培养实验，研究了类羧酸对棕壤中与氮素转化有关的生物活性的影响。
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