查询词典 sulfuric

Crack and rupture There were 13 tank cracks, 2 body ruptures one roof hole and one flange crack resulting in 13 spillages including oils, hydrochloric acid, sulfuric acid, molten sulfur, and sodium cyanide solution, 3 fires and explosions, and the falling of one operator.

裂缝和破裂那里是13 坦克镇压、2 身体破裂一个屋顶孔和一个耳轮缘裂缝造成13 spillages 包括油，盐酸、硫酸、溶解的硫磺、和钠氰化物解答、3 火和爆炸，和下落一名操作员。

This paper repots a study of the adsorption behavior of silver on charcoal, reports a method for the decomposition of charcoal with sulfuric acid and nitric acid, and establishes a method for the preconcentration and determination of the sub μg/L level of silver in natural water.

本文研究了银在活性炭上的吸附行为，提出了以硫酸、硝酸反复交替炭化，消化彻底分解破坏活性炭的处理技术。建立了活性炭富集火焰原子吸收测定天然水中亚μg/L水平银的分析方法。

With a purpose of making comprehensive use of heavy residual oil, condensed polynuclear aromatic resin is prepared using petroleum asphalt as raw material and terephthalyl alcohol as cross-linking agent under the catalysis of concentrated sulfuric acid or p-toluensulfonic acid.

从综合利用重质油出发，以石油沥青为单体，对苯二甲醇为交联剂，在浓硫酸或对甲苯磺酸催化下合成了缩合多环多核芳香烃树脂。

The invention relates to a preparation method of epsilon-MnO2 layered structure nano-sphere comprising the following steps: adding potassium persulphate, manganese sulphate, ferric nitrate and concentrated sulfuric acid into hydrothermal reactor, charging deionized water and fully stirring, natural cooling the mixture to room temperature after hydrothermal reaction for 1-24 hours at 110-200 DEG C, washing and drying the product to obtain hexagonal crystal epsilon-MnO2 layered structure nano-sphere with a stable structure and uniform grain size.

一种ε-MnO 2 层状结构纳米球的制备方法，将过硫酸钾，硫酸锰，硝酸铁，浓硫酸加入水热反应釜中，加入去离子水充分搅拌后，在110-200℃水热反应1～24h后自然冷却至室温。得到的产物经洗涤干燥即得到结构稳定，粒径均匀的六方晶型的ε-MnO 2 层状结构纳米球。

The sulfur-oxidizing bacteria have a characteristic of oxidating sulfur and sulfide into sulfuric acid.

硫氧化细菌具有氧化单质硫及硫化物，生成硫酸的特性。

Oxidizing feature which is oxidizing leaching of every element, studied kinetics of anode oxidation, analyzed oxidizing slag with XRD and SEM during suspension electrolysis of zinc sulphide mine. The results show that zinc sulphide concentrate in different suspension electrolysis solution can be oxidized. However, the ore in zinc sulphide, ammiaonia sulfate and sulfuric acid suspension electrolysis solution can be oxidized obviously and has better oxidation rate.

确定了硫化锌矿悬浮电解时的电解液后，我们又对硫化锌矿在悬浮电解过程氧化特征即矿物氧化时其中各元素的氧化溶出情况进行分析，对阳极氧化进行了动力学研究，对氧化渣进行XRD和SEM分析，以了解其含锌矿物在悬浮电解过程中的氧化规律，还进行了渣中元素硫的回收。

The amount of sulfuric acid, the ratio of liquid and solid, the microwave radiation time, the pressure, and the power on the yield of reducing sugar were investigated.

实验结果表明，微波辐射条件下，随着硫酸质量分数、固液比、辐射时间、压强、功率的变化，还原糖收率都存在着一个先增加后减少的趋势。

MERCURY STOCK SOLUTION : Transfer 135.4 mg of mercuric chloride to a 100-mL volumetric flask, and dilute with 1 N sulfuric acid to volume.

MERCURY储备溶液：升汞调动135.4毫克到100ml容量瓶， and稀释与1 N硫酸对容量。

If a variable-length is not fatal, can increase the vacuum printer still attracts; but in the case of variable-length very serious to the detriment of breathe in, you can use the appropriate uniform blowing up hair drier, sulfuric acid paper contraction, attracts, can't really back output and imposition.

如果变长不严轻，可不合调不小晒版机的真空度，仍能吸陡；但如变长很严轻而感化呼气时，可用电呼风不合陡均呼一下，硫酸纸关上，不即能吸陡了，的确不动，不即只好轻新输不入、拆版。

Melting point 3410 ℃, boiling point 560 ℃, relative density of 1935, F the external electronic structure of 5d46s2, in the chemical reaction time is very easy to lose 1-6 electronic, but also can get 1-2 electronic, so oxidation number of 0,± 1,± 2, 3, 4 , 5 and 6, with 6 price of the most stable compounds, such as WO3 does not dissolve in water, the air will form in the tungsten trioxide thin protective layer of tungsten, tungsten with fluorine at room temperature, chemical combination, red hot when there is no moisture and Bromine iodide together, red hot when you can and water reaction WO3, at room temperature reaction of tungsten with aqua regia, but the hot concentrated hydrochloric acid and sulfuric acid can only be played with its weak response, but molten nitrate, nitrite, too Hydrogen peroxide, sulfur steam, steam and other phosphorus can play intense reaction, high temperature can not be carbon, boron and silicon reaction of binary compounds, widely used in industrial tungsten steel and tungsten carbide, pure tungsten filament is used to the system, and X-ray tube Tube heating components, semiconductor components can be prepared tungsten silicide, tungsten industrial production is white or black tungsten ore tungsten ore refining.

熔点3410℃，沸点560℃，相对密度1935，F外围电子结构为5d46s2，在化学反应时很容易丢掉1—6个电子，也能得到1—2个电子，所以氧化数为0、±1、±2、＋3、＋4、＋5和＋6，以＋6价化合物最稳定，如WO3不溶于水，空气中的钨会形成薄层三氧化钨保护层，钨能与氟在室温下化合，红热并无潮气时能与溴、碘化合，红热时还能和水反应生成WO3，室温下钨可与王水反应，但热的浓盐酸和硫酸只能与其起微弱反应，但对熔融的硝酸盐、亚硝酸盐、过氧化氢、硫蒸汽、磷蒸汽等能起激烈反应，高温下不能与碳、硼和硅反应生成二元化合物，工业上广泛使用钨钢和碳化钨，纯钨用来制灯丝、电子管和X射线管的发热元件，硅化钨可制半导体元件，钨工业生产是将白钨矿石或黑钨矿石精炼。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。