查询词典 alkali

The findings of present work show that organic/water ratio,alkali metal alkali, phase transfer catalyst, reaction time, reaction temperature, all of them have influence to the molecular weight and yield of the production.

详细研究了溶剂/水的配比、碱金属碱、相转移催化剂、反应温度、反应时间等因素对产品分子量和产率的影响。

Control experiment results of white soil acidification with alkali treatment or not shows that alkali treatment is the key to 4A zeolite preparation.

进一步对酸化白土进行碱处理的对照实验，得出进行碱处理是制备4A分子筛的关键。

The saline alkali soil in Jilin province was formed under semiarid and semi moist weather which was distributed in bai cheng region. And the western grassland is the important animal husbandry base in Jilin province. So as far as the development of western animal husbandry and the goal of becoming an ecological province is concerned, it is of important significance that people turn the saline alkali soil into arable soil.

吉林省内的盐碱土，是在半湿润半干旱气候条件下形成的内陆型盐碱土，主要分布于西部的白城地区，而西部草原又是重要的牧业生产基地，因此，将这些盐碱化的土壤转变为可以耕种的土壤，对西部牧业的发展和实现生态省建设的目标来说，具有重大的意义。

The invention relates to a method for the extraction of keratin from dead animal skins, characterised in the treatment of dead animal skins with a substance of general formula, or at least one corresponding alkali metal, earth alkali metal, ammonium, or phosphonium salt, the variables having the following definitions: R, R = together or independently, H, C6-C14 aryl, C1-C12 alkyl, unsubstituted or substituted with one or several SH or OH groups, R, R = together or independently, H, C6-C14 aryl, C1-C12 alkyl, unsubstituted or substituted with one or several SH or OH groups, whereby at least one of R or R is not H, or R and R are not H and two vicinal groups of R to R together may be C3-C10 alkylene, R = H, C1-C12 alkyl, H-C=O or C1-C4-Alkyl-C=O, X, X, X and X = OH, SH or NHR, whereby where Rto R contains at least one sulphur atom, at least one of X to X = SH and where R to R contains no sulphur atom, at least two of X to X= SH.

本发明涉及一种从死亡动物原皮中除去角质的方法，其特征在于用通式I的物质或至少一种对应的碱金属盐、碱土金属盐、铵盐或∴盐处理死亡动物原皮，式I中各变量定义如下：R 1 和R 4 相同或不同且选自氢、C 6 -C 14 芳基和C 1 -C 12 烷基，其未被取代或被一个或多个SH或OH基团取代；R 2 和R 3 相同或不同且选自氢、C 6 -C 14 芳基和C 1 -C 12 烷基，其未被取代或被一个或多个SH或OH基团取代，其中至少一个基团R 2 或R 3 不为氢，或R 1 和R 4 不为氢，且两个相邻基团R 1 -R 4 可以一起为C 3 -C 10 亚烷基；R 5 选自氢、C 1 -C 12 烷基、H-C＝O或C 1 -C 4 烷基-C＝O；X 1 、X 2 、X 3 和X 4 选自OH、SH和NHR 5 ，其中若R 1 -R 4 含有至少一个硫原子，则至少一个基团X 1 -X 4 为SH，以及若R 1 -R 4 不含硫原子，则至少两个基团X 1 -X 4 为SH。

The alkali rocks include potassic alkali rocks and natric alkali rocks.

碱性岩：典型的碱性岩为硅不饱和，出现霞石、白榴石等似长石类矿物。

Bast fibers of Edgeworthia papyrifera purchased from mainland China and the Taimali research station of TFRI were pulped with the soda process, the alkali sulfite process, and sodium carbonate liquor, respectively. The yield, the kappa number, and the defiberating ratio under various alkali charges and alkali concentrations were evaluated.

本试验以自大陆进口之三桠树皮及林业试验所太麻里分所栽植之三桠树皮进行制浆试验，制浆之方法有苏打法、碱性亚硫酸钠法及以碳酸钠为蒸煮药品等三种，并由用碱量及药液浓度之变化来探讨三桠树皮之收率、卡巴值及解纤率。

In this paper, aging time of alkali cellulose was confirmed by researching the effect of aging time of alkali cellulose to its ability of withstanding alkali; The effect of temperature, the mass ratio of intermediate to cellulose, time, NaOH concentration on the mass and capacity of product.

研究了碱纤维的老化时间对抗碱能力的影响，确定了碱纤维的老化时间；研究了氢氧化钠的用量、中间体与纤维素的质量比、反应温度和反应时间对产物质量和产物交换容量的影响，并用红外光谱对产物的结构进行了表征。

The complexing properties of compounds 10a, 10b, 11a and 11b toward alkali metal ions were studied by 〓H NMR titration, ESI-MS, UV-Vis spectra, Fluoresence spectra and liquid-liquid extraction. The results show:(1) the 1:1 complexes were formed.(2) The calix-crown 10a, 11a have a higher selectivity for Na〓 ions, whereas 10b, 11b for K〓 ions.(3) The complexing ability toward alkali metal ions was enhanced when the calix-crown have side arm carbonyl.(3) The coordination of alkali metal ions toward phenoxy, carbonyl and crown ethereal oxygens take place by rotation around the carbon-carbon bond of carbonyl and methylene.

六，用〓H NMR滴定，ESI-MS，UV-Vis，Fluorescence，液-液萃取实验研究了10a，10b，11a和11b对金属离子的配位性质，研究结果表明：1）杯芳烃冠醚衍生物同碱金属离子形成了1：1配合物，化合物10a、11a对Na〓具有较高的配位能力，化合物10b、11b对K〓具有较高的配位能力；2）在杯冠醚环的旁边引入带有羰基氧原子的基团作为侧臂参与配位可以加强对碱金属离子的配位能力；3）金属离子分别同苯酚氧，羰基氧，聚氧醚链氧发生了配位，配位过程中侧链基团涉及到了羰基碳与亚甲基碳的碳碳键的旋转过程。

It has found that the liqnids exiting in the coatings can be divided into three types: the first is composed of pure alkali sulphate molten; the second, alkali sulphate with some calcium silicates dissolved in; the third, a mix molton of alkali sulphates with clinker liquid.

研究发现，窑尾系统结皮物料中所出现的液相共有三类。一类是主要是纯硫碱熔体；第二类为部分熔有硅酸钙的硫碱熔体；第三类为有部分熟料液相参与的混合液相。它们在结皮过程中扮演不同的角色。

The present paper carries on the raise first to the camptotheca acuminata roots of the hair, then in the use chloroform extraction camptotheca acuminata culture medium the camptotheca acuminata alkali and so on effective component, and examines the law with HPLC to examine its effective component, the examination discovers the camptotheca acuminata secretion in the culture medium secondary metabolite besides the camptotheca acuminata alkali, the hydroxyl camptotheca acuminata alkali, the white birch fatty acid, but also includes other effective components.

本论文先对喜树发根进行培养，然后使用氯仿提取喜树培养基中喜树碱等有效成分，并用HPLC检测法检测其有效成分，检测发现喜树分泌在培养基中的次生代谢产物除了喜树碱、羟基喜树碱、白桦脂酸外，还含有其他有效成分。

They weren't aggressive, but I yelled and threw a rock in their direction to get them off the trail and away from me, just in case.

他们没有侵略性，但我大喊，并在他们的方向扔石头让他们过的线索，远离我，以防万一。

In slot 2 in your bag put wrapping paper, quantity does not matter in this case.

在你的书包里槽2把包装纸、数量无关紧要。