Results 41 to 50 of about 18,724 (161)

Ultraviolet Spectrophotometry of Phenothiazine Derivatives and Analogs

Journal of AOAC INTERNATIONAL, 1973
Abstract Ultraviolet spectral data have been tabulated for 41 phenothiazine derivatives and analogs. The general appearance of the spectra is caused by the structure of the tricyclic π-system, whereas spectral shift effects are produced by R2 substituents.
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Simultaneous determination of moxifloxacin and cefixime by first and ratio first derivative ultraviolet spectrophotometry

Chemistry Central Journal, 2012
Background The new combination of moxifloxacin HCl and cefixime trihydrate is approved for the treatment of lower respiratory tract infections in adults.
Attimarad Mahesh, Al-Dhubiab Bander E, Alhaider Ibrahim A, Nair Anroop B, N Sree, K Mueen   +5 more
doaj   +1 more source

Quantitative detection of β-glucans in Cordyceps species using a validated Congo red assay

Scientific Reports
β-Glucan is extensively utilized in the food industry for its functional benefits, including blood glucose and lipid regulation, enhanced food texture, and a prolonged shelf life.
Haiwen Xia, Ran Zhang, Yufan Yin, Sisommay Souvanhnachit, Yingling Lu, Zihao Liu, Wenju Zhang, Hong Yu   +7 more
doaj   +1 more source

Detection of the polyphenolic components in[i] Ribes nigrum[/i] L.

Annals of Agricultural and Environmental Medicine, 2014
Background. The blackcurrant ([i]Ribes nigrum [/i]L.) is a species of native currant which contains a lot of polyphenolic antioxidants which is used medicinally and has a fundamental role in the maintenance health.
Monica BUTNARIU
doaj  

Ultraviolet Spectrophotometry of Early-Type Stars

The Astronomical Journal, 1964
Spinning rockets UV spectrophotometry of early type stars, discussing instrumentation, calibration, data recording and stellar ...
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Extraction and determination of flavonoids in Carthamus tinctorius

Open Chemistry, 2018
Carthamus tinctorius L. also known as: Acanthopanax safflower, red blue flower, it is the Compositae genus of safflower. The active ingredient of Chinese medicine safflower are flavonoids.
Ji Yubin, Guo Shizheng, Wang Bing, Yu Miao   +3 more
doaj   +1 more source

INTRINSIC FLUORESCENT COMPOUNDS IN ARMILLARIA MELLEA; HYPHAE AND RHIZOMORPH [PDF]

Journal of Sciences, Islamic Republic of Iran, 1993
The organic solvent extraction of Armillaria mellea showed different highly intrinsic fluorescent compounds either in rhizomorph or in hyphae (F , F , F , MF , MF and MF ).
doaj  

Spectrophotometer standardization in UV-Vis spectral region

Journal of Measurement Science and Instrumentation, 2016
Ultraviolet-visible（UV-Vis）spectrophotometry is commonly used in analytical laboratories for qualitative and quantitative analyses.To make the data obtained reliable,an experimental instrument must be calibrated.National Institute for Standards（NIS）in ...
Alaa-Eldin A Abd-Elmageed, Essam M Elmoghazy, Fatma Elsharkawy   +2 more
doaj  

Dimetridazole in Feeds by Ultraviolet Spectrophotometry

Journal of AOAC INTERNATIONAL, 1965
Abstract Dimetridazole absorbs strongly in the ultraviolet region of tbe spectrum. This property was vised to develop an analytical procedure for the drvig in feeds. In the procedure, a portion of feed is extracted in hot methanol, chromatographcd in methanol and in aqvieous solutions on alumina to remove interferences, and read on an ...
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UTILIZAÇÃO DO ESPECTRÔMETRO DE ABSORÇÃO ATÔMICA PARA DETERMINAÇÃO DE CLORIDRATO DE METFORMINA E CLORIDRATO DE RANITIDINA EM MEDICAMENTOS

Química Nova
The utilization of atomic absorption spectrometer for metformin (MET) and ranitidine (RAN) chlorohydrates determination in medicines is proposed. The spectral lines of nickel and aluminum at 232.0 and 308.2 nm were selected for MET and RAN absorbance ...
Mariana Barbosa André de Souza, Klaiani Bez Fontana, Caroline Gonçalves, Eduardo Sidinei Chaves   +3 more
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