نتایج جستجو برای: free carbonate clay

تعداد نتایج: 558272  

Journal: :مهندسی عمران فردوسی 0
محرم اسدزاده حسین سلطانی جیقه

excessive production and stockpile of scrap tires cause some environmental and sanitary risks throughout the world. to manage these materials, possible use of soil-tire mixtures has been recently propounded in civil engineering projects. a few studies previously have been conducted to evaluate behavior of clay-tire mixtures, while swelling properties, consolidation and settlement characteristic...

2002
LYNN M. WALTER

-Inorganic chemical analyses and short-chain aliphatic acid content are used to interpret the origin and compositional evolution of formation waters in the Alberta portion of the Western Canada Sedimentary Basin. Forty-three formation water samples were obtained covering a stratigraphic interval from Devonian to Cretaceous. The data show that: (1) there is a subaerially evaporated brine compone...

2008
M E Fleet X Liu

The crystal chemistry of carbonate in Ca apatites, including Na-free and Na-bearing hydroxylapatite (CHAP) and Na-bearing fluorapatite (CFAP) and chlorapatite (CCLAP), has been investigated by Fourier transform infrared (FTIR) spectroscopy and single-crystal X-ray structure, using crystals synthesised from carbonate-rich melts at 1 GPa, 1400 1000°C. The carbonate ion substitutes for both the X ...

2003
Dick Kroon Takashi Hasegawa

This report was prepared from shipboard files by scientists who participated in the cruise. The report was assembled under time constraints and does not contain all works and findings that will appear in the DISCLAIMER Any opinions, findings, and conclusions or recommendations expressed in this publication are those of the author(s) and do not necessarily reflect the views of the National Scien...

Journal: :Environmental science & technology 2006
Jaeshin Kim Gregory V Korshin Anatoly I Frenkel Alexander B Velichenko

Measurements of electrochemical (EC) arsenite oxidation demonstrated thatthe arsenite oxidation current increased in the presence of carbonate while the potential of the onset of EC arsenite oxidation exhibited a strong shift toward less positive values. Examination of pH and total carbonate concentration effects on the EC arsenite oxidation parameters showed that they were affected solely by t...

Journal: :Journal of Plant Nutrition and Soil Science 2022

Background Mid-infrared spectroscopy (MIRS) is commonly recognized as a rapid and high throughput measurement technology for numerous soil properties, given that appropriate prediction models are calibrated. Soil spectral libraries (SSL) may reduce effort costs MIRS practical application. Aims To calibrate MIR-SSL-based properties to test their applicability independent sample sets at regional ...

2012
Melissa L. Chipman Benjamin F. Clegg Feng Sheng Hu

Analyses of oxygen and carbon isotopes in bulk carbonate and Chara-stem encrustations, X-ray diffraction, and sediment composition from Keche Lake offer new information on climatic change over the past *3,400 years in northeastern interior Alaska. The dO and dD values of water samples from the lake and its inlet streams suggest that evaporation plays an important role in determining the isotopi...

1983
K. Kuruvilla A. Karunanidhi A.S. Kanagasabapathy

The effect of long-term lithium carbonate treatment on thyroid function was investigated in 40 clinically euthyroid patients with Manic Depressive Psychosis. Before lithium treatment, all patients showed normal levels (T(4)) of serum total thyroxine, free thyroxine index and thyrotropin (TSH). After lithium carbonate treatment for a mean period of 24 months, these patients did not show any sign...

ژورنال: علوم آب و خاک 2011
سمیه شمسی محمودآبادی, , فرهاد خرمالی, ,

In order to study the effects of different land uses on soil development, a loess hillslope was selected in Agh-Su area, eastern Golestan Province. Six profiles in four land uses including pasture, Quercuse natural forest, Cupressus artificial forest and a cultivated land, were dug and studied. Samples from different horizons were collected for physico-chemical and microscopic analyses. Importa...

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