نتایج جستجو برای: and tom total organic matter
تعداد نتایج: 16948075 فیلتر نتایج به سال:
BACKGROUND Parkinson's disease (PD) patients show theory of mind (ToM) deficit since the early stages of the disease, and this deficit has been associated with working memory, executive functions and quality of life impairment. To date, neuroanatomical correlates of ToM have not been assessed with magnetic resonance imaging in PD. The main objective of this study was to assess cerebral correlat...
Gulf of Oman, in the summer, is influenced by the southwest monsoon winds of India, and Jask protected area, which is ecologically and economically very important, is located in the northwestern area of this gulf. In this study, sampling of sediments was done from 2009 to 2010, in three station (mouth, mid and end) of Markazi creek (located in Jask city), by 0.04 m2 Van Veen Grab. Water physico...
To clarify the organic matter (OM) enrichment of Lishui Sag, factors influencing variable abundance OM in Lingfeng Formation are studied using geochemical data. The source rocks have medium–high total carbon (TOC) values (0.53–3.56%). main type kerogen is II2-III. Compared to shallow marine subfacies rocks, TOC delta front higher. distribution biomarkers shows that redox environment rock sub-ox...
The Gorgan Bay is an important ecosystem receiving discharge from their tributaries. In this study, concentration of Pb, Zn, Ni, Fe, Al, Cu and As was seasonally determined at 22 sampling points during 2012-2013.Sediment samples were collected using a Van Veen grab. The levels of heavy metals were determined by ICP-AES (Inductively Coupled Plasma Atomic Emission Spectrometry) and AAS (Atomic Ab...
throughout the present study, similar horizons (a, ab and b1) from deciduous forest, coniferous forest and rangeland types of land uses were selected, and the percentage of water stable aggregates in them measured. in each class of stable aggregate at the horizon a, free light fraction, free-particulate organic matter, intra-aggregate of particle organic mather (pom), and clay + silt complexes ...
Variation of hydrochemical conditions, with special reference to adequacy of waters as fish habitats, was traced based on selected hydrochemical parameters obtained during the studies conducted from February 2013 till February 2014 year. The results were compared with earlier studies. The sources of organic pollution were identified, and the effect of biogenic substances on the biomass, as well...
Some physico-chemical properties and the concentrations of the metals Fe, Mn, Ni, Cd, Cr, Co, Cu, Pb, and Zn in water and sediments were examined from September 2011 to January 2012 in Bodo Creek, where oil spills have been recurrent. Temperature, pH, total dissolved solid, conductivity, salinity, dissolved oxygen, biological oxygen demand (BOD), chemical oxygen demand (COD), total hardness, su...
abstract saturated water content is one of the important parameters which its measurement is necessary in estimation of soil water retention and unsaturated hydraulic conductivity curves. in several researches, saturated water content is assumed to be equal to soil total porosity. in some others, its value is estimated by pedotransfer functions using readily available parameters, such as bulk d...
Variation of hydrochemical conditions, with special reference to adequacy of waters as fish habitats, was traced based on selected hydrochemical parameters obtained during the studies conducted from February 2013 till February 2014 year. The results were compared with earlier studies. The sources of organic pollution were identified, and the effect of biogenic substances on the biomass, as well...
This study was carried out in line with the Caspian Sea water transportation program to the central plateau on the Southeast shores of the Caspian Sea (Goharbaran region) since 2013-2014. Sampling was performed monthly and there were 8 stations at depths of 5, 10 and 15 meters in 2 transects. The purpose of this study was to investigate the relationships between some physico-chemical parameters...
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