نتایج جستجو برای: organic components
تعداد نتایج: 583132 فیلتر نتایج به سال:
Salt-impacted soils occur in floodplains, wetlands and backswamps in arid climates. These soils become sinks or temporary storage sites for soluble salts and contaminants including agricultural chemicals, industrial pollutants and radionuclides such as I. The vertical distribution of I in the Black Butte soil series along the Virgin river was assessed and the distribution of I between I , IO 3 ...
in this study the environmental problems has been studied in south east of tehran (bibi shahrbanou mount). 31 sediment samples were taken from 10-15 cm extremity of streams and were analyzed by icp. toxic elements studied include: ag, as, cd, cr, cu, ni, pb, sb and zn. the samples were also investigated for mineralogy using xrd. the clay mineral assemblage encountered in the analyzed samples is...
Detailed investigations of the chemical and microphysical properties of atmospheric aerosol particles were performed at the puy-de-Dôme (pdD) research station (1465 m) in autumn (September and October 2008), winter (February and March 2009), and summer (June 2010) using a compact Time-of-Flight Aerosol Mass Spectrometer (cToFAMS). Over the three campaigns, the average mass concentrations of the...
Organic aerosols (OA) can be separated with factor analysis of aerosol mass spectrometer (AMS) data into hydrocarbon-like OA (HOA) and oxygenated OA (OOA). We develop a new method to parameterize H:C of OOA in terms of f43 (ratio of m/z 43, mostly C2H3O, to total signal in the component mass spectrum). Such parameterization allows for the transformation of large database of ambient OOA componen...
Pulse oximetry is a ubiquitous non-invasive medical sensing method for measuring pulse rate and arterial blood oxygenation. Conventional pulse oximeters use expensive optoelectronic components that restrict sensing locations to finger tips or ear lobes due to their rigid form and area-scaling complexity. In this work, we report a pulse oximeter sensor based on organic materials, which are compa...
This article presents the distribution of the dithiothreitol-based (DTT) redox activity of water-soluble airborne particulate matter (PM) from two urban sites in the city of Thessaloniki, northern Greece in four size ranges (<0.49, 0.49–0.97, 0.97–3.0 and >3 μm). Seasonal and spatial variations are examined. The correlations of the mass-normalized DTT activity with the content of PM in water-so...
Department of Radiation Oncology, University of Michigan Medical Center, Ann Arbor, MI; USA Cell Engineering Research Centre and Department of Cell Biology, State Key Laboratory of Cancer Biology, Fourth Military Medical University, Xi’an, China Departments of Molecular Biosciences and Radiation Oncology, University of Kansas, Lawrence, KS, USA Department of Hematology/Oncology, Hainan Universi...
In this research the effects of organic and chemical fertilizers on essential oil content and composition of lemon balm were investigated. This research was conducted in completely block randomized design with 4 replications in 2019 and 2020. Treatments were organic fertilizers (from source of horse, sheep, cow, hen and vermicompost) and complete chemical fertilizer of NPK (20-20-20). The most ...
In the title hydrate, C17H18N2O5·H2O, the complete organic mol-ecule is generated by a crystallographic mirror plane with one C and one O atom lying on the mirror plane. The O atom of the water mol-ecule has m site symmetry. Two symmetry-related intra-molecular O-H⋯O hydrogen bonds complete S(6) rings in the organic mol-ecule. In the crystal, the components are linked into (010) sheets by O-H⋯O...
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