Permeation tubes are convenient analyte sources for generating standard gas mixtures (containing, in particular, volatile organic compounds) used in the calibration of analytical instruments. For small permeation rates, corresponding to trace levels of analytes, the calibration of permeation tubes is time-consuming. The use of thermogravimetry as a means to measure rapidly the weight loss at co...

The generation of biomass residues in different productive activities rural communities Mexico represents an area opportunity for the bioenergy various purposes. Solid biofuels (SBF), example, are alternative exploitation these residues. present study shows a comprehensive proposal analysis Pinus spp. generated by artisanal sector community Mexico. is based on four stages: a) characterization p...

This research was performed to evaluate the mechanical and thermal properties of sugar palm fiber (SPF)- kenaf (KF)-reinforced polypropylene (PP) composites. Sugar palm/kenaf successfully treated by benzoylation treatment. The hybridized bio-composites (PP/SPF/KF) were fabricated with overall 10 weight percentage (wt%) relatively three different fibers ratios between palm-treated kenaf-treated ...

Structural and surface properties of chromatographic porous silica, alumina, titania and zirconia were studied using thermogravimetry and nitrogen adsorption. The samples studied are mesoporous and exhibit relatively narrow pore size distributions in the range from 10 to 30 nm, making them suitable for chromatographic applications. Low-pressure nitrogen adsorption and thermogravimetry were used...

This experimental study aims to explore natural lignocellulosic fibers from Jenfokie and Doby plants. The effect of the fiber (water-retted non-retted) extraction methods on physical, mechanical, thermal, chemical, crystallinity properties were experimentally investigated for collected eastern highlands Ethiopia. chemical composition (cellulose, hemicellulose, lignin, extractives, etc.) was det...

Transposition of great arteries (TGA) is one of the most common and severe congenital heart diseases (CHD). It is also one of the most mysterious CHD because it has no precedent in phylogenetic and ontogenetic development, it does not represent an alternative physiological model of blood circulation and its etiology and morphogenesis are still largely unknown. However, recent epidemiologic, exp...

The back-sheet shields the solar panel from UV rays, moisture, dust, and other environmental factors. With enormous growth of industry year after year, demand for recycling is also increasing rapidly. In present study, layer was extracted a waste crystalline silicon PV module by thermally heating at 130˚C temperature. Various characterization techniques, including Raman, FTIR, SEM-EDAX, XRD, TG...

To evaluate risk factors and prognosis of transient global amnesia (TGA), three groups of 30 subjects each affected respectively by: (1) first-ever TGA; (2) first-ever transient ischaemic attack (TIA); (3) depressive neurosis, were compared. Prevalence of cerebrovascular risk factors was similar in patients with TGA and TIA, but significantly lower in the third group. CT showed more hypodense l...