搜索结果: 1-13 共查到“知识库 有机化学 method”相关记录13条 . 查询时间(0.093 秒)
Synthesis and characterization of gold nanoparticles supported on zinc oxide via the deposition-precipitation method
Au nanoparticles ZnO nanorods deposition-precipitation
2010/10/19
Gold nanoparticles supported on zinc oxide nanoparticles were synthesized at several pH levels via the deposition-precipitation (DP) method. The effects of pH on gold loading, particle size, and parti...
Synthesis of 5-Arylamino-1H (2H)-tetrazoles and 5-Amino-1-aryl-1H-tetrazoles from Secondary Arylcyanamides in Glacial Acetic Acid: A Simple and Efficient Method
5-Arylamino-1H (2H)-tetrazoles 5-amino-1-aryl-1H-tetrazoles arylcyanamides guanyl azides glacial acetic acid
2010/4/9
A simple and efficient method for the preparation of 5-arylamino-1H (2H)-tetrazoles (3a-i) and 5-amino-1-ary-1H-tetrazoles (4a-i), with excellent yields and high purity, from secondary arylcyanamides ...
Quantitative Structure--Retention Study of Some 2,4-dioksotetrahydro- 1,3--thiazole Derivatives Using the Partial Least Squares Method
2,4-dioksotetrahydro-1,3-thiazoles Quantitative Structure-Retention Relationships (QSRR) Molecular descriptors Partial Least Squares Regression (PLS)
2010/4/9
Thin-layer chromatography on rice starch support and aqueous ammonia--organic modifier (methanol, dioxane, and acetone) mobile phases was used to study the effect on retention of the chromatographic s...
A Facile Method for the Preparation of Poly(4-vinylpyridine) Nanoparticles and their Characterization
Microgel nanogel nanoparticles nanotechnology core-shell structure biomaterials bactericidal antibiotic polymers
2010/4/9
Submicron size particles were synthesized from 4-vinylpyridine (4-VP) using an oil-in-water emulsion system. Divinyl benzene (DVB) and ethylene glycol dimethacrylate (EGDMA) were utilized as crosslink...
Synthesis and Characterization of NiFe2O4 Nano-Octahedrons by EDTA-Assisted Hydrothermal Method
Octahedral nanocrystals ferrites magnetic nanoparticles hydrothermal synthesis coercivity EDTA NiFe2O4
2010/4/8
Octahedral-like NiFe2O4 ferrite nanocrystals were synthesized using EDTA-assisted hydrothermal method under mild conditions. XRD and FTIR analysis were used for composition and structure investigation...
A New Method of Synthesis of Azo Schiff Base Ligands with Azo and Azomethine Donors: Synthesis of N-4-Methoxy- benzylidene-2-(3-hydroxyphenylazo)-5-hydroxy- aniline and Its Nickel(II) Complex
synthesis azo compound Schiff base ligand azo and azomethine donor
2007/12/19
摘要 A new method for the synthesis of azo Schiff an base ligand in which the azo and azomethine groups are coordination sites was developed through a Schiff base precursor. The precursor, N-4-methoxybe...
Selenium and Trace Element Distribution in Astragalus Plants: Developing a Differential Pulse Polarographic Method for Their Determination
Gazi University Chemistry Department
2010/4/16
Astragalus plants have a wide range of applications in pharmaceuticals (gum tragacanth), as thickening agents in foods, and may have applications in controlling cancer cells. They are used as feed for...
A Convenient Method for the Preparation of 2-Aminobenzophenone Derivatives under Ultrasonic Irradiation
the Preparation 2-Aminobenzophenone
2010/4/19
A quick and convenient method for the preparation of 2-aminobenzophenone derivatives is described. This approach consists of the nucleophilic substitution reaction of nitrobenzenes by phenylacetonitri...
Efficient Method for Tetrahydropyranylation of Phenols and Alcohols Using 2,4,6-Trichloro[1,3,5]triazine
2,4,6- Trichloro[1,3,5]triazine (TT) cyanuric chloride (CC) alcohol phenol tetrahydropyranylation 3,4-dihydro- 2H-pyran (DHP) protection
2010/4/19
Alcohols and phenols were tetrahydropyranylated in the presence of 2,4,6-trichloro[1,3,5]triazine in good to excellent yields in acetonitrile.
A New and Convenient Method of Generating Alkyl Isocyanates from Alcohols, Thiols, and Trimethylsilyl Ethers Using a 2,4,6-Trichloro[1,3,5] Triazine/n-Bu4NOCN
2,4,6-Trichloro[1,3,5] triazine (TT) alcohol thiol trimethylsilyl ether alkyl isocyanate
2010/4/19
Alkyl isocyanates are prepared in good to excellent yields by treatment of alcohols, thiols, and trimethylsilyl ethers with 2,4,6-trichloro[1,3,5] triazine/n-Bu4NOCN in acetonitrile. This method is hi...
A Rapid Spectrophotometric Method to Resolve a Binary Mixture of Food Colorants (Riboflavine and Sunset Yellow)
Derivative spectrophotometry simultaneous determination zero-crossing measurements sunset yellow riboflavine colorants food analysis
2010/4/20
A very simple and rapid spectrophotometric method using measurements at zero-crossing wavelength is described for resolving binary mixtures of riboflavine (E-101) and sunset yellow (E-110) in a powder...
Application of IBX Method for the Synthesis of Ketones from Carboxylic Acids
IBX (o-iodoxy benzoic acid) methoxy phenyl propionic acid ketone Oxidation
2010/4/21
Methoxy phenyl propionic acid and some derivatives are converted to ketones using a new method. All classical methods to obtain ketones from carboxylic acids via acid halide consistently gave very low...
The Reliability of Jung-Biggs-Moorhead Method for Cholesterol Determination in the Presence of Ergosterol
The Reliability of Jung-Biggs-Moorhead Method Cholesterol Determination Presence of Ergosterol
2010/8/19
In the present study, the reliability of Jung-Biggs-Moorhead method for cholesterol determination has been tested in the presence of another steroid, ergosterol. It was observed that presence of ergos...