查询词典 acetic acid

Besides, reaction conditions including the concentration of acetic acid and the solvents of photochemical reaction were also studied.

通过研究乙酸浓度和光化溶剂对反应的影响，对合成工艺进行改进和优化。

The carbonation conversions of calcium acetate and calcium magnesium acetate from the acetification of limestone and dolomite reacting by acetic acid solution were investigated under different conditions during multiple calcination-carbonation cycles.

在不同反应条件下分别研究了石灰石和白云石的醋酸化产物醋酸钙和醋酸钙镁在循环煅烧－碳酸化过程中的碳酸化转化率。

The immunoregulation activity of SPG-1 mainly existed in the part of sugar chain, but keeping its molecular structure intact had some effects on its immunoregulation activity; SPG sulphation had reducing effects on the immunoregulation of SPG-1, whereas, after medium and low acetification of SPG, the immunoregulation of SPG was enhanced. Conversely after high acetification, the immunoregulation of SPG-1 decreased, that is, after introducing sulfuric and acetic acid base in SPG-1, its immunoregulation changed. All of these indicated the structure of SPG-1 was closely connected with its immune activity.⑤.

甘薯糖蛋白SPG-1的免疫调节活性主要在其糖链部分，但保持分子结构的完整性对其免疫调节的活性有一定的作用；甘薯糖蛋白硫酸化对甘薯糖蛋白SPG-1的免疫调节有降低作用，而中、低度乙酰化后，可提高甘薯糖蛋白的免疫调节作用，高度乙酰化后则降低其免疫调节作用，即甘薯糖蛋白引入乙酰基和硫酸基团后，其免疫调节活性发生了改变，这些均表明了甘薯糖蛋白的结构与其免疫调节活性有密切的关系。

Severe burns may result from direct skin contact, irreversible damage or blindness from direct contact of the chemical to the eyes, and inhalation of per- acetic acid vapor or mist will irritate the nose, throat, and lungs. Currently there

直接接触皮肤会导致严重烧伤，此化学品与眼睛直接接触会导致不可逆损害或致盲，吸入过氧乙酸的蒸汽或雾会刺激鼻腔、喉和肺部。

Acetobacillus spp can transform carbohydrate to acetic acid radical ion, increase the amount of milk and improve its quality.

醋酸菌发酵后可将糖类转变成醋酸根离子，增加泌乳量，及改善乳质。

However, when the target organic was acetic acid (an inhibitor of radical reaction),Fe2+/O3 and O3 had similar degradation efficiencies.

当目标有机物是对自由基链反应具有抑制剂作用的乙酸时，O3和Fe2+/O3对乙酸有着相似的降解效率。

Almost 100% selectivity to cyclohexene could be obtained when the molar ratio of acetic acid to cyclohexane was 12.9∶1 at 450 ℃, the conversion of cyclohexane was 6.9%.

反应温度为450 ℃，醋酸与环己烷的摩尔比为12.9∶1时，环己烷的转化率为6.9%，环己烯的选择性为100%。

The advantage of this process is to directly obtain acrylate through catalytic reaction of acetic acid and methanol.

本技术以煤化工基础原料合成气的基础产品醋酸和甲醇，经过催化反应合成丙烯酸，工艺技术的特点是可直接获得丙烯酸或丙烯酸酯。

Aims We investigated aerenchyma formation in stems of riparian plants Arundinella anomala and Salix variegate as affected by addition of ethylene and a-naphthalene acetic acid under non-flooded conditions in order to ascertain whether phytohormone ethylene and auxin are direct stimuli for aerenchyma formation in flooded plants.

为了探究乙烯和α-萘乙酸是否是水淹环境条件下植物体内通气组织形成的直接原因，对三峡库区岸生植物野古草和秋华柳在无水淹环境条件下施加乙烯利和α-NAA后茎中通气组织的形成情况进行了研究。

After 5 d,the alcoholicity was 7.9%.The acetic acid fer- mentation conditions were:inoculum size 10%,sugar degree 5%,alcoholicity 6%,fermentation at 30℃.

醋酸发酵的工艺条件为醋酸菌接种量10%，糖度5%，酒精度6%，30℃恒温振荡发酵6d，火龙果原醋的总酸为37g/L。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。