难溶

本文提出了测定水难溶单元酸的两种线性滴定方法。

Two linear methods for evaluating slightly soluble acids are presented .

酸性介质中难溶弱酸盐溶解度的探讨

Discussion for Several Types Solubility of Slightly Soluble Salts of Weak Acids in Acidic Medium

初步探明煮沸丝胶溶液并不发生崩坏，而是发生变性，从而重新支持传统的易溶性与难溶性A、B丝胶论；

Therefore , the traditional theory of both easily and difficultly soluble sericin A-B has been supported again .

A菌根真菌外生菌丝对难溶性无机磷酸盐的活化及利用Ⅰ.~（32）P间接标记法

Mobilization and utilization of sparingly soluble phosphates by VA mycorrhizal fungus external hyphae ⅰ? ? ~ ( 32 ) p indirectly labelling

在pH值高于2.57的环境里，难溶磷酸盐很难被溶解。

With pH values higher than 2.57 in the environment , insoluble phosphates are difficult to dissolve .

两亲性聚乙二醇大单体改性pH敏感水凝胶及其对难溶性药物的装载与控释

PH Sensitive Hydrogels Modified with Amphiphilic PEG Macromonomer for Loading and Controlled Release of Poorly Water Soluble Drugs

通过加入共溶剂让难溶于超临界CO2的丙烯酰胺成功聚合，使难溶固体在超临界二氧化碳中引发聚合变得可能。

Successfully polymerize acrylamide in supercritical carbon dioxide by add co-solvent was polymerized successfully .

黄铁矿在酸性溶液中溶解速率相对较快，并易达到溶解平衡。然而，部分由于反应产物形成的难溶物吸附沉积在表面，导致剩余黄铁矿表面Fe（Ⅱ）的溶解速率要缓慢地多。

The dissolution of pyrite in acidic solution was relatively fast and easily reached to dissolution equilibrium .

牛血清白蛋白-羟基磷灰石难溶性复合物的FT-IR光谱研究

FT IR Study on the Precipitates of Bovine Serum Albumin

新制的CA为淡黄色粉末，易溶解于水和酸性溶液，碱性溶液中难溶。

The newly produced product is faint yellow powder , soluble in water and acid solution and insoluble in alkaline solution .

采用温室盆栽试验研究了3个不同磷（P）效率小麦品种（品系）对水溶性、构溶性和难溶性3种P肥的相对肥效。

The effect of water-soluble , citrate-soluble and hardly soluble phosphate on wheat vari-eties with various phosphorus ( P ) efficiencies was studied by a pot experiment under greenhouse conditions .

用氢氧化钠熔融土样，盐酸调节pH到8～9，使干扰阳离子形成难溶物。

Soil sample was melted by sodium hydroxide and adjusted to pH 8-9 by hydrochloric acid . The disturbing cation was converted into undissolved matter .

应用ICP-AES技术测定胆管胆色素结石粉及其难溶部分中的元素组分

Determination of elements in bile duct porphobilin lithofellic powder and its indissolvable part by ICP-AES

植物对VA菌根的依赖性差异及菌根活化难溶性磷酸盐的机理研究

Variation of Plants Mycorrhizal Dependency and Mobilization of Scarcely-Soluble Phosphate by VA Mycorrhizae

凝胶法生长ABO4型难溶盐晶体的研究

Study on the Crystal Growth of Insoluble Salts of ABO_4 Type from Gel

综述了液体制剂开发中难溶性药物的增溶方法，包括调节溶液pH值，应用表面活性剂，潜溶剂及包合等方法。

This review discussed how to improve the solubilization of hydrophobic drugs , including pH adjustment , complexation , and uses of cosolvents , surfactants and emulsification .

结果难溶性药物的HPMC骨架片释药随着其溶解度的增加而加快。结论难溶性药物HPMC骨架片释药的差异主要与药物在不同pH的溶出介质中的溶解度有关。

RESULTS AND CONCLUSION Insoluble drug release from the HPMC hydrogel matrix is related to its solubility .

难溶金属化合物在树脂上的吸附率与溶液pH值的关系与采用活性碳作吸附剂的情况十分相似。

The dependence of the adsorbability of slightly water soluble metal compounds on the pH value of the solution is very similar to that with activated carbon as adsorbent .

由于PPV自身难溶于有机溶剂，使其应用受到限制。

The application of PPV is limited for its hard solubility in organic solvent .

通过微环境pH值的降低，大量游离H+攻击难溶磷酸盐，使铁矿矿粉中的磷溶解到环境中。

Reduction of pH value of the micro-environment makes a large number of free H + to attack insoluble phosphates , and phosphorus in iron ore is dissolved to the environment .

神经网络在预测难溶性药物从HPMC骨架片中释放的应用

Application of neural network in predicting the release of insoluble drugs from HPMC matrix tablets

当Mn2+在弱碱性中（pH为9～10）反应生成难溶于水的红色螯合物，悬浮物在明胶存在下形成透明、均匀、稳定的有色溶胶。

Mn2 + in weak base can creat red chelate which is very slightly soluble . Under gelatin 's presence , suspended matter forms diaphaneity , homogeneous and stable , colored sol .

对Fe元素而言，除了变成难溶性的氧化物外，在热氧化过程中还发生了由氮化硅粉料表面向颗粒内部的扩散。

In addition to formation of insoluble species , diffusion of Fe3 + from particle surface into the bulk of silicon nitride powder is also found after thermal oxidation treatment .

对研制成功的CQ－1和NS－916等难溶垢的清除剂做了室内评价和现场应用试验。

This paper introduces the CQ - 1 and NS - 916 type cleaning agent of infusible scale .

在铬渣湿法解毒研究领域，采用何种方式经济有效的浸出铬渣中难溶化合物中的Cr（Ⅵ）是关键。

It is important to choose an economical way to leach the Cr ( VI ) in insoluble compounds of COPR effectively in the research field of wet process of COPR .

对于ICP、AA和湿法化学分析手段，对于难溶样品，熔融方法同样是一种非常完美的制样手段。

This bead fusion method is a perfect sampling method for ICP , AA , as well as for indissolvable samples in wet chemical analysis .

混合粉尘泛指低含量游离SiO2与高含量致纤维化作用较弱的不溶或难溶的无机成份。

Mixed dust consists of low content of free silica and high content insoluble or hardly soluble inorganic component with weak fibrogenic effects .

该制备方法提高了Nb2O5难溶固体粉末在催化剂中的分散，为难溶固体粉末催化材料的应用提供了可借鉴的方法。

The preparation method improves the dispersion of Nb_2O_5 in Au / α - Fe_2O_3 catalyst and gives insight into the application of unsolvable solid powder catalytic materials .

目的探讨稀释剂对难溶性药物的HPMC骨架片释药的影响。

OBJECTIVE The effect of different diluents on the release rate of insoluble drug from HPMC hydrogel matrix was investigated .

目的：研究羟丙基甲基纤维素（HPMC）骨架片中难溶性药物释放的机理，建立数学模型，用于预测药物释放。

Objective : To investigate the release model of insoluble drug carbamazepine ( CBM ) based on HPMC matrix tablets .