In line with the growing health trend in Malaysia, more consumers drink herbal tea for medicinal benefits. However, products could be contaminated polycyclic aromatic hydrocarbons (PAHs) from various production sources. There is a little study focused on detection of PAHs species distributed Malaysia. This was performed to investigate content and toxicity selected commercial teas A total seven ...

An on-line automated method for photodegradation studies of isoproturon, diuron, atrazine, fenitrothion, and metoxuron by means of liquid chromatography/mass spectrometry (LC/MS) with particle beam (PB) interface is described. Surface water samples were first spiked with 50 µg/l of each pesticide and then exposed to the radiation of the medium-pressure mercury lamp. Next, in regular intervals o...

background: several effects of volatile organic compounds (vocs) have been recognized such as toxic and carcinogenic human health effects. to evaluate cancer risk of benzenes air samples were taken, at an automobile manufacturing painters in tehran following inhalation exposure. methods: to perform this study, cross-sectional was done in 2016. sampling was carried out by active pump sampler usi...

conclusions further investigations are needed about favorable composition of unsaturated fatty acids and flavonoid content of leaves of s. paradoxa. in addition, due to high phenolic content of the leaves, s. paradoxa is a promising source of natural antioxidants and may play good antidiabetic activity. results the amount of total phenolic compounds was higher in leaves than roots. besides, roo...

acrylic base resins are widely used in orthopedics and dental surgery. it is generally accepted that due to the incomplete conversion of methyl methacrylate (mma) monomer to the polymer form during polymerization of the resin, some mma monomers remain in the hardened material. mma monomer has been reported to cause abnormalities or lesions in several organs of animals. study of the literatures ...

Adaptation strategies in the wine sector consist of use cultural techniques to limit damages caused by climate change, using, among other resources, varieties better adapted scenarios abiotic stress exacerbation, namely water and thermal stress, as well those more tolerant heatwaves. With intention determine aromatic characterization ten monovarietal wines produced from cultivars with high prod...

Abstract The standard method to evaluate human exposure volatile organic compounds (VOCs) is in general performed by sampling the air on sorbents followed liquid extraction and detection using laboratory gas chromatograph (GC). conventional time labor intensive employs a toxic solvent which adds risk factor as well waste. Hence, there have been increasing demands for portable GC instruments all...

Abstract The effect of the chemical composition hydrotreated light cycle oil (HDT LCO) on benzene, toluene, ethylbenzene, and xylene (BTEX) production by a hydrocracking (HCK) procedure, is presented. Six different types HDT LCOs were obtained submitting two to hydrotreating (HDT) with catalysts experimental conditions. products analyzed as mono-, di- tri-aromatic compounds using supercritical ...

A method for characterization of airborne particles including the nanoparticles fraction with a diameter of 29-58 nm in roadside atmosphere has been described. The method consists of thermal extraction (TE) and comprehensive two-dimensional gas chromatography (GC x GC) with novel detection capabilities, including high resolution time-of-flight mass spectrometry (HRTOF-MS), and simultaneous sele...