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In basic aqueous system, large single crystal of 〓and 〓 were obtained, it wasthe first time that the double salt 〓 was synthesizedfrom aqueous solution.

在碱性条件下,首次合成了以质子化的有机胺为阳离子的无水偏钒酸盐单晶〓;首次以水热法合成了无水偏钒酸盐复盐〓单晶。

PG was used to produce different types of binding materials as β-hemihydrate gypsum,Ⅱanhydrate gypsum and α-hemihydrate gypsum and the relevant factors were also studied systematically including the pretreatment methods of raw material, preparation process, the material properties, the mixing proportions, curing conditions and the hydration mechanism of different systems.

对磷石膏制备胶结材进行了深入、系统研究,包括β-半水石膏、Ⅱ-无水石膏的原料预处理方式、制备工艺、性能及其复合胶结材配比、养护、性能与水化硬化机理,α-半水石膏的制备工艺及其性能影响因素,二水磷石膏改性胶结材的配比、养护、性能及其改性机理。

Through the experiments on hydration of AH in the following sulphate(Li_2SO_4、MgSO_4 、 Al_2(SO_4)_3 、MnSO_4 、CuSO_4 、CoSO4 、CdSO_4 、ZnSO_4 、NiSO_4 、FeSO_4), dissoluble sulfate hydrate origining from hydration process of AH affects it's hydrous rate, hydrous rate of AH does not connect with Z/R of cation in stimulation, theory that Z/R affect hydrous rate of AH does not exist. Third, hydration of AH in dissoluble sulfate complies with dissolve-nucleate -grow theory, concentration of Ca~2+ from dissolving of CaSO_4 is higher than one of CaSO_4·2H_2O, calcium sulphate dihydrite gets a motivity of crystallization. dissoluble sulfate takes the following function: double-salt or dissoluble sulfate hydrate from hydration of AH in it becomes heterogeneous particle and a kind of nucleation catalyzer, and reduces surface barrier when DH becomes crystal because the crystal of DH precedently appears in uneven place. Results indicate hydration of AH does not conform with double-salt theory, but it conform with this mechanism: dissolve-nucleate-grow, formation of DH is an uneven nucleation and crystalizaion process.

通过对CaSO_4在Na_2SO_4 、K_2SO_4 、Rb_2SO_4 、Cs_2SO_4 、(NH_4)_2SO_4溶液中水化过程,以及CaSO_4·2H_2O、CaSO_4与以上硫酸盐反应速度、产物的研究,说明复盐理论不正确;CaSO_4在(Li_2SO_4、MgSO_4 、 Al_2(SO_4)_3 、MnSO_4 、CuSO_4 、CoSO_4 、CdSO_4 、ZnSO_4 、NiSO_4 、FeSO_4)溶液中水化,水化过程中硫酸盐水合物的析晶影响着无水硫酸钙水化,与激发剂阳离子Z/R值大小无关,阳离子的Z/R参数影响水化率的规律并不存在; 3、无水硫酸钙在可溶性硫酸盐中的水化按照溶解-成核-生长理论进行,CaSO_4达到溶解平衡时Ca~2+的浓度大于CaSO_4·2H_2O溶解平衡的Ca~2+的浓度,CaSO_4·2H_2O获得结晶的驱动力,可溶性硫酸盐起到形成晶核的作用:水化过程与CaSO_4生成复盐或析出水合物所形成的细小物相,作为异质微粒使母相中存在不均匀性,这些不均匀性有效地降低成核时的表面能位垒,使CaSO_4·2H_2O晶核优先地在这些具不均匀性的地方形成,因此这些物质起成核催化剂作用。

The major hydrate is CSH gel under this condition. Curing of mortar in water increases the hydration degree of the binder with or without thermal proceeding. In addition to more CSH gels, some ettringite is formed.

试样脱模后在60 ℃蒸养6 h将阻碍无水石膏向二水石膏转化,但促进粉煤灰的火山灰反应,此时主要水化产物是CSH凝胶;继续水养护进一步促进胶结材的水化,除生成较多CSH凝胶外,还有部分钙矾石生成。

Through designing of composition and structure of the bioactive graded coating,innerstress and its distribution in the coating were analyzed and calculated, the resultsshowed that when composition distribution coefficient n was 1.5, a reasonable stressdistribution could be got, that was at the beginning of deposition the suspension containingrichly BG granules was used so that a rich BG granules layer, a good transitional layerbetween BG layer at the bottom and the coating could be obtained at the titanium alloy side,the bottom of the coating; the stress value near the interface and surface and its character,pressure stress or tensile stress, were decided by the character of its composition itself.Changing composition distribution coefficient n could only change the variation tendency ofstress in the coating, but did not change the stress distribution rule in the coating. Thethinner the coating is, the sharper stress variation in the coating is, which does not mean thatthicker coating is better because the thicker the coating is, the little the permitteddeformation of coating is, so the coating thickness should be thinner, for example, about50μm for bending applications, but for applications only bearing pure shear stress, such asroot of tooth implant, the coating can be thicker little, for instance, about 80~100μm. The study on electrification characteristic and electrophoresis deposition of HAand BG granules in aqueous and non-aqueous solution system found that EPD almost didn'toccur in aqueous solution system. However, because HA granules take position charges inabsolute alcohol, a homogeneous EPD be carried out on the cathode titanium alloy slice, but taking negative charge in absolute alcohol the BG granules not be deposited on the cathode. A guided HA crystallizing, 100~300nm, on surface of the BG granules be realized by metathetical reaction, which cover BG granules with HA microcrystals and make the covered BG granules taking position charges in absolute alcohol, sequentially realize the EPCD of the BG and HA granules on the cathode, so it is feasible to make a titanium alloy/BG/HA bioactive graded coating by making use of EPCD technology. The corrosion experiment of rich boron bioglass coating and plasma spray coating showed that split phase, rich boron and rich silicon phase, occurred during its preparation. In basic medium the corrosion behavior of 〓 BG coating showed uniformity corrosion, the corrosion mostly occurred at rich boron phase area, therefore batch formula design of BGshould avoid the occurring of split phase. The corrosion appearance of plasma spray coatingappeared a non-uniform corrosion, mostly occurred at the edge of the laminated HA moltendrops, and emerged an accelerated corrosion tendency, which will easyly lead to corrosioncrackles extending to the interface and the happening of osmotic interfacial corrosion, thatmay be one of the major reasons leading to the coating cracking-off in the later period. Thetesting results of thermal expansion coefficient of 〓 and 〓BG showed the thermalexpansion coefficient of 〓 BG matched with that of titanium alloy better, and 〓 BG couldsinter with titanium alloy into densification enamel layer at low temperature (720℃).

将Ti6Al4V合金在1000℃下进行真空热处理会降低其力学性能,且合金内的V元素会向表面富集,因此,钛合金真空热处理和表面涂层的烧结温度不能过高,即应低于其相转变点;通过对生物活性梯度涂层的组成和结构的设计,分析和计算了梯度涂层内的应力大小和分布,结果表明:对于本研究,当成分分布系数n=1.5时,可以获得较合理的涂层力学性能,即在沉积开始时,采用富含BG颗粒的悬浮液,以便在钛合金侧获得同底层BG有良好过渡的富BG涂层;梯度涂层界面和表面的应力大小、性质由材料组成本身的性质决定,改变成分分布系数,只能改变涂层内应力变化的趋势;涂层的厚薄不影响涂层内的应力分布规律,但涂层越薄,涂层内的应力变化越快,但这并不意味着涂层越厚越好,因为涂层越厚,涂层允许的变形越小,对于应用于弯曲受力部位的涂层而言,涂层应薄一点为好(50μm);而对于仅纯受剪切应力的部位,如牙根种植体,涂层可适当加厚(80~100μm);通过对HA和BG颗粒在水溶液体系和非水溶液体系中的带电特性和电泳沉积的研究发现,它们在水溶液体系中很难发生电沉积;在无水乙醇溶液中,HA颗粒带正电,可在阴极钛合金片上发生均匀的电泳沉积,而BG颗粒则带负电荷;利用复分解反应法,可以制得100~300nm的HA,通过诱导HA在BG颗粒表面结晶,可对BG颗粒进行表面包覆,获得了被HA包覆的BG颗粒,改变了BG颗粒表面的带电特性,使BG和HA颗粒在无水乙醇中均带上正电荷,从而实现了HA和BG颗粒在阴极上的共沉积。

During the study period, we found that plants were present only in natural creek banks, but not altered ones. Comparisons between natural banks without plants and altered banks revealed no significant difference in both shrimp abundance and distribution. However, there was significant difference in shrimp abundance when natural banks with plants and altered banks were compared, suggesting that construction might have negative effects on plants and, in turm, on shrimp abudance. Comparisons between reproductive and non-reproductive season yielded significant results in both shrimp abundance and distribution, which resulted from the recruitment of juveniles to local populations.

在实验期间,自然河段有水蕴草而整治河段没有水蕴草的存在,比较无水蕴草的自然河段与整治河段,发现无论是数量或出现率都没有显著差异,然而,在有水蕴草存在的自然河段之多齿新米虾数量与出现率则较整治河段高,显示哈盆溪可能因为整治工程影响了底质的型态,导致水蕴草不易生长,进而影响多齿新米虾的数量及出现率;在季节方面,结果显示,不同季节在数量和出现率上都有显著差异,而此差异是因为幼虾在生殖季大量加入族群所致。

Watery Signs; but especially, and above all others, Scorpio, make traitors; and therefore if the Moon lady of the Ascendant be in that viperous sign; the Native will betray, or prove a traitor to, his master; and if the same position happen in the radix of a city, its inhabitants will be rebellious against their Princes or Governors.

水相星座,特别是天蝎,出叛逆者;因此如果月亮是命主星,且位于天蝎座,盘主会出卖或被证实背叛其主人。如果同样的情况发生在一座城市的出生图上,其居住民会反对他们的统治者。注:水相星座出叛逆者大概是因为水本身不能保持形状,因此具有水特性的水相星座也不能保守秘密。另外,天蝎是一个有毒的星座(在古典占星中天蝎的地位很不妙的),水的无形状性在天蝎恶意的辅助下进一步恶化了。城市和个人一样,只是宏观和微观的相对视角。

The liposolubility is the major component in the extractum,and therefore,dehydrated alcohol and acetone may be used as the dewaxing solvent for the extractum.

无水乙醇和丙酮是理想的浸膏后处理和脱蜡溶剂。结论:该浸膏含较多的脂溶性成分,采用无水乙醇和丙酮作为浸膏的脱蜡溶剂是可行的。

Four different sorbents (CaSO4, kaoline, CaCO3 and bauxite) were used to make the control test of heavy metals; and different sorbents were found to have different adsorption of heavy metal. These sorbents not only had physical adsorption of heavy metals but also had chemical reaction between sorbents and heavy metals.

添加无水CaSO4,高岭土,铝土矿,无水CaCO3 4种不同的吸附剂,发现不同的吸附剂对不同的重金属有不同的吸附作用。4种吸附剂对重金属元素的吸附既有物理吸附,又有吸附剂与重金属之间的化学反应。

Place 5 ml in a test-tube immersed in iced water, add 0.4 ml of a 100 g/l solution of potassium chloride R, 0.1 ml of diphenylamine solution R and, dropwise with shaking, 5 ml of nitrogen-free sulphuric acid R.

硝酸盐:取本品5ml置试管中,于冰浴中冷却,加100g/l氯化钾溶液0.4ml与0.1%二苯胺溶液0.1ml,边摇边滴加无氮的硫酸5ml,摇匀,将试管于50℃水浴中放置15分钟,溶液产生的蓝色与标准硝酸盐溶液(2 ppm NO3)0.5ml,加无硝酸盐的水4.5ml,在同一时间用同一方法处理后的颜色比较,不得更深。

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