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晶型     
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  crystal form
    A NEW CRYSTAL FORM OF NATEGLINIDE
    那格列奈的新晶型(英文)
短句来源
    The X-ray diffraction patterns and DTA suggested no change in crystal form.
    由X-衍射分析、差热分析可知,经混合研磨后灰黄霉素的晶型没有发生改变。
短句来源
    No loss of combined solvent or crystal form transformation were observed during micronization.
    且微粉化过程无结合溶剂损失及晶型转化发生。
短句来源
    CONCLUSION The S form nateglinide is a new crystal form.
    结论 S型那格列奈是一种新的晶型
短句来源
    RESULTS The crystal form of drug disappeared in the dispersion and the cumulative dissolution increased evidently.
    结果 药物的晶型消失 ,累积溶出速率明显增加。
短句来源
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  crystal
    A Study on Crystal Modification of Nimodipine
    尼莫地平晶型转变的研究
短句来源
    OBJECTIVE The relative bioavailabilities of different sinomenine hydrochloride crystal in healthy volunteers were compared.
    目的:比较盐酸青藤碱不同晶型在人体的相对生物利用度。
    CONCLUSION The pure white sinomenine hydrochloride is the best crystal, it can be referenced for production.
    结论:纯白盐酸青藤碱为最佳晶型,为该原料药制剂生产提供参考。
    Study on Mechanism of Formation of Betamethasone Acetate Different Crystal Forms
    不同晶型倍他米松醋酸酯形成机理研究
短句来源
    Analysis and Comparison of Polymorphs Crystal Structure of Lincomycin Hydrochloride
    盐酸林可霉素两种晶型晶体结构的分析与比较
短句来源
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  polymorph
    LIMIT TEST OF POLYMORPH A IN THE CHIORAMPHENICOL PALMITATE SUSPENSIONT BY 2cm~(-1) FTIR SPECTROSCOPY
    用分辨率为2cm~(-1)的FTIR检查棕榈氯霉素混悬液中A晶型的限量
短句来源
    Studies on the polymorph of topotecan hydrochloride and its stability
    盐酸拓扑替康的晶型与稳定性研究
短句来源
    RESULTS The relation is proportional to absorption value and the polymorph A content at 843 cm -1 . When the transmitance is as function, the linearity equation is y=95.68-0.9425x and r =-0.9983. When the absorbance is as function, the linearity equation is y=0.01169+0.005424x and r =0.9943. CONCLUSION This method is quick, simple, accurate and feasible.
    结果 :棕榈氯霉素 A晶型在 843 cm-1 处的吸收强度与含量成线性关系 ,用透光率表示时 ,线性方程为 y=95 .68-0 .942 5 x,相关系数 r=-0 .9983。 用吸收度表示时 ,线性方程为 y=0 .0 1169+0 .0 0 5 42 4x,相关系数 r=0 .9943。
短句来源
    The limit test of Polymorph A can directly testing at 843cm~(-1) with reference substance comparisonmethod of 10% polymorph A.
    可直接在A晶型特征吸收峰843cm~(-1)处,采用 10%A 晶型对照品比较法检查其限量。
短句来源
    3 polymorphs were quite sensitive to light, the polymorph stability against light was Ⅲ>Ⅰ>Ⅱ.
    3种晶型均具有光敏性。 其稳定性顺序为Ⅲ >Ⅰ >Ⅱ。
短句来源
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  crystal forms
    Study on Mechanism of Formation of Betamethasone Acetate Different Crystal Forms
    不同晶型倍他米松醋酸酯形成机理研究
短句来源
    Study on Crystal forms of Tegaserod Maleate
    马来酸替加色罗的晶型研究
短句来源
    The results indicate that nateglinide has three crystal forms,B-form,H-form and S-form.
    结果表明:那格列奈具有B晶型、H晶型和S晶型三种结构.
短句来源
    Identification of Nateglinide and Its Crystal Forms in Nateglinide Tablets Using IR Spectra Subtraction Techniques
    红外光谱消去法鉴别片剂中那格列奈及其晶型
短句来源
    Methods for the analysis of drug crystal forms
    药物晶型的分析方法
短句来源
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  crystal form
The effects of preparation process on particle size, specific surface area, crystal form and crystalline morphology of the tungsten trioxide was investigated by TEM and XRD etc.
      
A New Crystal Form of the Fab Fragment of a Monoclonal Antibody to Human Interleukin-2: The Three-Dimensional Structure at 2.7 ?
      
In crystal form, complex I is composed of oppositely charged complex ions [CaL2(H2O)4]2+ (I1) and [Ca(NCS)4(H2O)2]2- (I2) united by an infinite three-dimensional net of hydrogen bonds.
      
In crystal form, complex I exists as the two aforesaid complex ions [I1]2+ and [I2]4- in the molar ratio 2 : 1 united through hydrogen bonds.
      
Complexes II in crystal form two-dimensional networks by means of hydrogen bonds.
      
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  crystal
Using the theory of crystal bases as the main tool, we prove a quantum analogue of Richardson's theorem.
      
Parameterizing Hecke Algebra Modules: Bernstein-Zelevinsky Multisegments, Kleshchev Multipartitions, and Crystal Graphs
      
Here, we report using the estrogen receptor that the location of drugs in x-ray crystal structures of the receptors matches closely their predicted spatial locations in the DNA.
      
The ageing of the reaction mixture reduces the growth rate of mordenite crystal along a-axis and b-axis but hardly influences the growth rate along c-axis.
      
The growth rate of the mordenite crystal along individual axes increases first and then decreases with increasing concentration of sodium hydroxide.
      
更多          
  polymorph
Effect of High Pressure on Crystalline Glycine: A New High-Pressure Polymorph
      
In the P4 polymorph, homochiral hydrogen-bonded dianilinegossypol molecules form trimers.
      
This mode of H-agglomeraton of dianilinegossypol molecules is characteristic only of the P4 polymorph.
      
γ-UMo2O8 as a new polymorph of uranium dimolybdate containing tetravalent uranium
      
Fluid synthesis and structure of a new boron nitride polymorph-hyperdiamond fulborenite B12N12 (E phase)
      
更多          
  crystal forms
The three-dimensional structure of the antigen-binding fragment of a monoclonal antibody to human interleukin-2 was determined in two crystal forms by the X-ray method of molecular replacement at 2.2 and 2.9 ? resolutions.
      
New crystal forms of tris(2-aminoethanolato-O,N)cobalt(III): Structures and properties
      
"New crystal forms of Tris(2-aminoethanolato-O,N)cobalt(III): Structures and properties" [Russian journal of coordination chemis
      
Four solid-crystal forms of paraazoxyanisole and the thermodynamic relationships between them
      
It is shown that paraazoxyanisole has four solid-crystal forms.
      
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  其他


The attribution of two crystalline modifications of thiamine hydrochloride, their conditions of formation, stability and the mechanism of transformation were investigated physicochemically by phase diagram. It was found that the two crystalline modifications were monohydrate and semihydrate respectively. The water solubility of the former was greater than that of the latter. During recrystallization the direction of crystallization favors the monohydrate adduct form owing to the great difference of crystal growth...

The attribution of two crystalline modifications of thiamine hydrochloride, their conditions of formation, stability and the mechanism of transformation were investigated physicochemically by phase diagram. It was found that the two crystalline modifications were monohydrate and semihydrate respectively. The water solubility of the former was greater than that of the latter. During recrystallization the direction of crystallization favors the monohydrate adduct form owing to the great difference of crystal growth rate. It dissolved gradually on ageing and separated out as semihydrate adduct form. In moist atmosphere, a"liquid film" was formed around the surface of the monohydrate form due to deliquescence or adsorption of multimolecular layer. Transformation of the polymorphic forms similar to that in ageing process occured in the"liquid film" and was accompanied by caking of the crystals.

本文运用物理化学相分析方法,系统地研究了盐酸硫胺两种结品变体的属性、生成条件、稳定性和转换机制。指出两种结晶变体分别是盐酸硫胺的一水和半水加成物。前者的溶解度大于后者。重结晶时,由于一水物生长速度较半水物大得多,从而改变了结晶方向,总是先析出一水加成物,陈化过程中再逐步溶解,重新以半水加成物形式析出。潮湿环境中,由于潮解或多分子层吸附在晶体表面上形成“液膜”,“液膜”中发生了类似陈化过程中的晶型转换,并伴随着结块现象。

This paper reports studies on the relationship between polymorphism and stability of ampicillin sodium(69-52-3) (Ⅰ) for improving its property in solid state, and providing an easy and precise method to predict the shelflife of drugs.The three polymorphie modifications, A, B and C, and an amorphism of (Ⅰ) were analyzed by X-ray diffraction, IR, DTA, polarizing microscopy, electronscanning microscopy and NMR. The modifications A, B and C are crystallized from iso-propanol, dichloromethane and acetonitrile systems,...

This paper reports studies on the relationship between polymorphism and stability of ampicillin sodium(69-52-3) (Ⅰ) for improving its property in solid state, and providing an easy and precise method to predict the shelflife of drugs.The three polymorphie modifications, A, B and C, and an amorphism of (Ⅰ) were analyzed by X-ray diffraction, IR, DTA, polarizing microscopy, electronscanning microscopy and NMR. The modifications A, B and C are crystallized from iso-propanol, dichloromethane and acetonitrile systems, respectively, while the amorphism is produced either by freeze drying or by spray drying.By means of the moisture-absorption test in RH: 52% and the thermal stability test, it was dynamically demonstrated that the modification C is far more stable than the modifications A and B, and the amorphism is the least stable. Through determining the heat of solution, it was found that (Ⅰ) in any Crystal modifications possesses less internal energy than the amorphism. Due to this, it was thermodynamically proved why the crystal modifications are more stable than the amorphism. In the thermal stability test, the method known as the rule of initial equal speed was used, thus the shelflife of drugs can be easily predicted without predetermining the order of reaction.Thus, it may be stated that improving the stability of (Ⅰ) in solid state can be achieved by changing its crystal modification.

经X线粉末衍射、扫描电子显微镜等仪器的测试,检测出氨苄青霉素钠存在A,B和C三种晶型。52%相对湿度的吸湿试验和热稳定性加速试验,从动力学证明C型晶体稳定性相对较好,A型和B型其次,无定形最差。溶解热的测定从热力学证明结晶型具有相对较低的内能,无定形较高,所以无定形稳定性较差。热稳定性加速试验中,根据初均速原理,用青霉素自动分析仪对含量变化作测定,使结果较好地满足Arrhenius方程式。本试验方法较简便,并且有较好的精度和重演性。通过本项工作,对不同晶型的氨苄青霉素钠样品的稳定性优劣作出了判别,为提高产品质量提供了部分依据。

New formulations were developed to increase the relative bioavailability of ibuprofen tablets produced by Shan Dong Xin Hua Pharmaceutical Factory in China. The dissolution rates of the tablets available in the Chinese market(A), the tablets of the new formulations (B and C) and the reference tablets made by British Boots Company (D) were determined. Human bioavailability studies were conducted to assess the in vivo performances of A, B and C relative to D by GC. The particle sizes of ibuprofen raw materials...

New formulations were developed to increase the relative bioavailability of ibuprofen tablets produced by Shan Dong Xin Hua Pharmaceutical Factory in China. The dissolution rates of the tablets available in the Chinese market(A), the tablets of the new formulations (B and C) and the reference tablets made by British Boots Company (D) were determined. Human bioavailability studies were conducted to assess the in vivo performances of A, B and C relative to D by GC. The particle sizes of ibuprofen raw materials (A′, B′, D′) used for producing tablets (A, B and C, D) were ascertained and the differences of crystal forms between A′ and D′ were compared.

本文试制出新处方布洛芬片剂,选择山东新华制药厂三种片剂:市售处方A、新处方片剂B和C,以及英国Boots公司的片剂D,进行体外溶出速率和人体生物利用度试验,并测定了生产A,B(和C),D片剂的布洛芬原料A′,B′,D′的粒度,比较了A′,D′的晶型。实验表明,国内外原料晶型相同,A′,B′,D′平均粒径分别为130.0,36.6,56.6μm。A与D生物不等效,B和C与D生物等效。提高国产片剂生物利用度的因素主要与原料粒度、处方组成和制备工艺有关。

 
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