Results 131 to 140 of about 179,472 (317)

Phytochemical analysis and biological activity evaluation of essential oil of Scrophularia atropatana [PDF]

open access: yesResearch Journal of Pharmacognosy, 2017
Background and objectives: Scrophularia atropatana (S. atropatana) is endemic to western and central regions of Iran. It belongs to the genus of Scrophularia (family: Scrophulariaceae).
H. Tabibi   +3 more
doaj  

Application of chromatographic methods for quality control of cannabinoid impurities in products containing Cannabidiol [PDF]

open access: yesPharmacia
Strict quality control of impurities in legitimate cannabidiol products and in cannabis “novel foods” is necessary due to the increased health risks from side effects associated with these impurities.
Dobrina Tsvetkova   +2 more
doaj   +3 more sources

Vanillin production from lignin depolymerization by acidic deep eutectic solvent and its possible mechanism

open access: yesEnvironmental Progress &Sustainable Energy, EarlyView.
Abstract As one of the most abundant renewable resources and complex aromatic polymers, lignin holds great promise for producing monophenolic compounds. However, its depolymerization into valuable monomers is hindered by intricate side reactions. In this study, alkaline lignin was converted into vanillin using nine choline chloride‐based deep eutectic ...
Xiaoyan Chen, Xiaohui Pan, Dongyang Cui
wiley   +1 more source

Effect of Fruit Maturation Stage on the Chemical Composition and Antioxidant and Cytotoxic Activities of Piper nigrum Essential Oil

open access: yesFlavour and Fragrance Journal, EarlyView.
The essential oils of Piper nigrum show marked chemical and biological variation across fruit maturation stages. Ripe fruits yield oils with the strongest antioxidant and cytotoxic activities, demonstrating that maturation directly modulates volatile composition and enhances the bioactive potential of this aromatic species.
Marcio Marcelo da Siva Pessoa   +6 more
wiley   +1 more source

Evaluation of chemical composition and biological activity of the aerial parts of Artemisia fragrans [PDF]

open access: yesResearch Journal of Pharmacognosy, 2017
Background and objectives: The genus Artemisia, an important member of the Asteraceae family, is mostly distributed in Europe, North America, Asia and South Africa, and represented in Iranian flora by 34 species. In the Iranian traditional medicine these
P. Akbari   +4 more
doaj  

Interlaboratory comparison 09/2017 - VOC measurement from indoor air samples [PDF]

open access: yes, 2018
Proftest SYKE carried out the interlaboratory comparison for TVOC thermodesorption measurements (ISO 16000-6) from native indoor air samples in Tenax TA thermodesorption tubes (IDA 09/17) in October-November 2017.
Hovi, Hanna   +6 more
core  

Fluorescent light and sunlight radiations may improve rice bran oil colour and influence its oxidative stability and chemical composition

open access: yesFood Biomacromolecules, EarlyView.
Abstract The influence of pretreatment of rice bran oil using fluorescent and sunlight radiations on its colour and their influence on its chemical composition and oxidative stability were assessed. Rice bran oil was stored under sunlight, fluorescent light and ambient conditions for 60 days. Oil samples were collected every 15 days for analysis.
Sab Sharon Mbape   +3 more
wiley   +1 more source

Natural extracts of soursop flowers, aged green tea leaves, and ginger rhizomes mitigate thermo‐oxidative degradation of palm olein during plantain chip deep‐frying

open access: yesFood Biomacromolecules, EarlyView.
Addition of old green tea leaves, soursop flowers and ginger root extract at concentrations 1000, 1400, and 1800 ppm in palm olein significantly extend its shelf‐life during frying of plantain chips. These plants' extracts are potential alternative to the use of synthetic antioxidants in preserving oil quality. Abstract This work was designed to assess
Valerie Demgne Loungaing   +4 more
wiley   +1 more source

Identification of Compounds Causing Cellular Autofluorescence in Touch Samples [PDF]

open access: yes, 2021
As DNA analysis has advanced and produced tests with higher sensitivities, attention has turned toward obtaining DNA profiles from cells left with fingermarks.
Wall, Elora C
core   +1 more source

Toxicological Analysis of Exhumed Specimens: A Challenge for Toxicologists

open access: yesArab Journal of Forensic Sciences & Forensic Medicine, 2016
The objective of this work is to describe the type of biological samples submitted for toxicological analysis after exhumation. Forensic toxicologists receive a variety of biological samples, but exhumed biological specimens with varying degrees of ...
Muhammad Taimoor Chaudhary   +5 more
doaj   +1 more source

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