Results 11 to 20 of about 15,336 (235)

Electronic Smoking Devices Among University Students: Usage Patterns and Chemical Composition of Inhaled Substances. [PDF]

open access: yesAnal Sci Adv
ABSTRACT This study investigated the prevalence of electronic smoking device (ESD) use and its associated behavioural and chemical risks among university students in Bahia, Brazil. A cross‐sectional survey was conducted with 355 students from public and private institutions through an online questionnaire between April and May 2023. Among participants,
Valenzuela EF   +7 more
europepmc   +2 more sources

Residue-Specific Incorporation of the Non-Canonical Amino Acid Norleucine Improves Lipase Activity on Synthetic Polyesters

open access: yesFrontiers in Bioengineering and Biotechnology, 2022
Environmentally friendly functionalization and recycling processes for synthetic polymers have recently gained momentum, and enzymes play a central role in these procedures.
Karolina Haernvall   +21 more
doaj   +1 more source

Chemical Characterization of Water-Soluble Organic Acids in Size-Segregated Particles at a Suburban Site in Saitama, Japan

open access: yesAsian Journal of Atmospheric Environment, 2009
Saturated n-dicarboxylic acids (C2-C7, C9), unsaturated dicarboxylic acids (maleic, fumaric, phthalic acid), ketocarboxylic acids (pyruvic, glyoxylic acid), and dicarbonyls (glyoxal, methylglyoxal) were determined in size-segregated samples with a high ...
Linfa Bao , Kazuhiko Sakamoto
doaj   +1 more source

synthesis of novel n-Substituted phthalimidyl esters and thier applications

open access: yesمجلة بغداد للعلوم, 2006
Research has included preparation of three of n Vthal acids Amec Bmentoj high of interaction vehicles Ortometta and bar aminophenol with phthalic anhydride was withdrawn water and ring closure of acids Alvthal AMEC ...
Baghdad Science Journal
doaj   +1 more source

Composition of semi-volatile organic compounds in the urban atmosphere of Singapore: influence of biomass burning [PDF]

open access: yesAtmospheric Chemistry and Physics, 2010
An intensive field study was conducted in the urban atmosphere of Singapore to investigate the composition of organic compounds in both gaseous and particulate phases during the period of August to early November 2006.
J. He, B. Zielinska, R. Balasubramanian
doaj   +1 more source

Synthesis and evaluation of antimicrobial activity of cyclic imides derived from phthalic and succinic anhydrides

open access: yesResearch in Pharmaceutical Sciences, 2017
Cyclic imides are a group of compounds which have valuable biological properties including cytotoxic, anti-inflammatory, antibacterial and antifungal activities. In this study, succinic and phthalic anhydrides were treated with glycinamide in pyridine to
Elham Jafari   +5 more
doaj   +1 more source

Determination of Volatility Parameters of Secondary Organic Aerosol Components via Thermal Analysis

open access: yesAtmosphere, 2022
To date, there are limited data on the thermal properties of secondary organic aerosol (SOA) components. In this study, we employed an experimental method to evaluate the physical properties of some atmospherically relevant compounds.
Fawad Ashraf   +5 more
doaj   +1 more source

Toxicological Characterization of Phthalic Acid

open access: yesToxicological Research, 2011
There has been growing concern about the toxicity of phthalate esters. Phthalate esters are being used widely for the production of perfume, nail varnish, hairsprays and other personal/cosmetic uses. Recently, exposure to phthalates has been assessed by analyzing urine for their metabolites. The parent phthalate is rapidly metabolized to its monoester (
Bang, Du Yeon   +2 more
openaire   +3 more sources

Phthalic acid esters--an overview. [PDF]

open access: yesEnvironmental Health Perspectives, 1973
In recent years those in the scientific community concerned with environmental and public health have been called upon to consider two categories of previously unsuspected materials characterized by wide distribution and long persistence in the environment: mercury, especially organic mercury, and the chlorinated diphenyls (PCBs).
openaire   +2 more sources

The effect of long-term moderate exercise on myocardial metabolome in rats

open access: yesChinese Journal of Physiology, 2023
Regular moderate physical exercise is beneficial for the cardiovascular system. Our prior study has demonstrated a long-term moderate exercise (4-week of 60-min 74.0% V̇O2max treadmill running) is optimal in protecting from exhaustive exercise-induced ...
Zheng Ping   +3 more
doaj   +1 more source

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