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Showing 1 to 12 of 109 entries
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Determination of Trace Amounts of Lead Using the Flotation-spectrophotometric method.

Analytical chemistry insights

Shiri S, Delpisheh A, Haeri A, Poornajaf A, Golzadeh B, Shiri S.
PMID: 30543271
Anal Chem Insights. 2011 Mar 01;6:15-20. doi: 10.4137/ACI.S5948. eCollection 2011.

The present study describes a simple and highly selective method for separation, preconcentration and spectrophotometric determination of extremely low concentrations of lead. It is based on flotation of a complex of Pb

Insight into Biochemical Characterization of Plant Sesquiterpene Synthases.

Analytical chemistry insights

Manczak T, Simonsen HT.
PMID: 27721652
Anal Chem Insights. 2016 Sep 29;11:1-7. doi: 10.4137/ACI.S40292. eCollection 2016.

A fast and reproducible protocol was established for enzymatic characterization of plant sesquiterpene synthases that can incorporate radioactivity in their products. The method utilizes the 96-well format in conjunction with cluster tubes and enables processing of >200 samples a...

Extraction of Honey Polyphenols: Method Development and Evidence of Cis Isomerization.

Analytical chemistry insights

Istasse T, Jacquet N, Berchem T, Haubruge E, Nguyen BK, Richel A.
PMID: 27547032
Anal Chem Insights. 2016 Aug 10;11:49-57. doi: 10.4137/ACI.S39739. eCollection 2016.

Honey polyphenols have been studied with the objective of relating honeys to their floral sources. Initially synthesized by plant, these polyphenols can be found in the plant's nectar, which are collected by bees, which convert the nectar into honey....

Determination of key intermediates in cholesterol and bile acid biosynthesis by stable isotope dilution mass spectrometry.

Analytical chemistry insights

Yoshida T, Honda A, Miyazaki H, Matsuzaki Y.
PMID: 19609389
Anal Chem Insights. 2008 Mar 25;3:45-60. doi: 10.4137/aci.s611.

For more than a decade, we have developed stable isotope dilution mass spectrometry methods to quantify key intermediates in cholesterol and bile acid biosynthesis, mevalonate and oxysterols, respectively. The methods are more sensitive and reproducible than conventional radioisotope (RI),...

Microalbuminuria measured by three different methods, blood pressure and cardiovascular risk factors in elderly Swedish males.

Analytical chemistry insights

Florvall G, Basu S, Helmersson J, Larsson A.
PMID: 19609391
Anal Chem Insights. 2008 Sep 02;3:69-74.

Microalbuminuria is associated with hypertension and is a strong risk factor for subsequent chronic disease, both renal and coronary heart disease (CHD), Presently there are several methods available for measurement of microalbuminuria. The aim of this study was to...

Use of Fourier Transform Infrared (FTIR) spectroscopy to study cadmium-induced changes in Padina tetrastromatica (Hauck).

Analytical chemistry insights

D'Souza L, Devi P, Shridhar DM, Naik CG.
PMID: 19609397
Anal Chem Insights. 2008 Oct 15;3:135-43.

The aim of this study is to adopt the approach of metabolic fingerprinting through the use of Fourier Transform Infrared (FTIR) technique to understand changes in the chemical structure in Padina tetrastromatica (Hauck). The marine brown alga under study...

Detecting the site of phosphorylation in phosphopeptides without loss of phosphate group using MALDI TOF mass spectrometry.

Analytical chemistry insights

Jagannadham MV, Nagaraj R.
PMID: 19609387
Anal Chem Insights. 2008 Feb 26;3:21-9. doi: 10.4137/aci.s497.

Phosphopeptides with one and four phosphate groups were characterized by MALDI mass spectrometry. The molecular ion of monophosphopeptide could be detected both as positive and negative ions by MALDI TOF with delayed extraction (DE) and in the reflector mode....

A validated reverse phase HPLC method for the determination of disodium EDTA in meropenem drug substance with UV-detection using precolumn derivatization technique.

Analytical chemistry insights

Narola B, Singh AS, Mitra M, Santhakumar PR, Chandrashekhar TG.
PMID: 21760705
Anal Chem Insights. 2011;6:7-14. doi: 10.4137/ACI.S5953. Epub 2011 Feb 23.

This paper deals with development and validation of a high performance liquid chromatographic method for the quantitative determination of disodium EDTA (Ethylenediaminetetraacetic acid) in Meropenem active pharmaceutical ingredient (API). EDTA was derivatized with Ferric chloride solution by heating at...

Cell-free expression of protein kinase a for rapid activity assays.

Analytical chemistry insights

Leippe DM, Zhao KQ, Hsiao K, Slater MR.
PMID: 20520741
Anal Chem Insights. 2010 May 19;5:25-36. doi: 10.4137/aci.s4732.

Functional protein analysis often calls for lengthy, laborious in vivo protein expression and purification, and can be complicated by the lack of stability of the purified protein. In this study, we demonstrate the feasibility of a simplified procedure for...

Identification and quantitation of asparagine and citrulline using high-performance liquid chromatography (HPLC).

Analytical chemistry insights

Bai C, Reilly CC, Wood BW.
PMID: 19662174
Anal Chem Insights. 2007 Mar 28;2:31-6.

High-performance liquid chromatography (HPLC) analysis was used for identification of two problematic ureides, asparagine and citrulline. We report here a technique that takes advantage of the predictable delay in retention time of the co-asparagine/citrulline peak to enable both qualitative...

Role of 99mTc-(V)DMSA in detecting tumor cell proliferation.

Analytical chemistry insights

Al-Saeedi F.
PMID: 19662181
Anal Chem Insights. 2007 Dec 13;2:81-3.

Pentavalent technetium-99m dimercaptosuccinic acid ((99m)Tc-(V)DMSA) is a tumor-seeking agent which was introduced to evaluate, image, and manage many types of cancers. In this review, the beginning of, and the most recent applications of using this agent was appraised. The...

UV-Vis spectrophotometrical and analytical methodology for the determination of singlet oxygen in new antibacterials drugs.

Analytical chemistry insights

Zoltan T, Vargas F, Izzo C.
PMID: 19662185
Anal Chem Insights. 2007 Nov 11;2:111-8.

We have determined and quantified spectrophotometrically the capacity of producing reactive oxygen species (ROS) as (1)O(2) during the photolysis with UV-A light of 5 new synthesized naphthyl ester derivates of well-known quinolone antibacterials (nalidixic acid (1), cinoxacin (2), norfloxacin...

Showing 1 to 12 of 109 entries