نتایج جستجو برای: lime caco3

تعداد نتایج: 9260  

2008
Megumi O. Chikamoto Katsumi Matsumoto Andy Ridgwell

[1] Changes in the distribution of the preservation and burial of calcium carbonate (CaCO3) in deep ocean sediments and associated atmospheric pCO2 response to the shutdown of the Atlantic meridional overturning circulation (MOC) are examined using an Earth system model. We find that shutdown of the Atlantic MOC forced by the freshwater inflow significantly decreases the CaCO3 content in North ...

2010
Ju-Long Chen Fan-Long Jin Soo-Jin Park

Epoxy ternary systems were prepared from the diglycidylether of bisphenol-A (DGEBA), epoxidized castor oil (ECO), and nano-CaCO3 using a thermally latent initiator. The effects of ECO and the nano-CaCO3 contents on the thermal stability and mechanical interfacial properties of the prepared DGEBA/ECO/nano-CaCO3 ternary systems were examined by thermogravimetric analysis (TGA), Izod impact tests,...

2016
Daniel Trnovsky Laura Stoltenberg Tyler Cyronak Bradley D. Eyre

Increasing atmospheric CO2 is raising sea surface temperature (SST) and increasing seawater CO2 concentrations, resulting in a lower oceanic pH (ocean acidification; OA), which is expected to reduce the accretion of coral reef ecosystems. Although sediments comprise most of the calcium carbonate (CaCO3) within coral reefs, no in situ studies have looked at the combined effects of increased SST ...

Journal: :The Journal of Experimental Medicine 2003
Naděžda Brdičková Tomáš Brdička Pavla Angelisová Ondrej Horváth Jiří Špička Ivan Hilgert Jan Pačes Luca Simeoni Stefanie Kliche Camilla Merten Burkhart Schraven Václav Hořejší

Lymphocyte membrane rafts contain molecules critical for immunoreceptor signaling. Here, we report identification of a new raft-associated adaptor protein LIME (Lck-interacting molecule) expressed predominantly in T lymphocytes. LIME becomes tyrosine phosphorylated after cross-linking of the CD4 or CD8 coreceptors. Phospho-LIME associates with the Src family kinase Lck and its negative regulato...

2013
Meire Coelho Ferreira Maria Letícia Ramos-Jorge Alberto Carlos Botazzo Delbem Ricardo de Sousa Vieirac

The aim of the present study was to investigate the abrasive effect of CaCO3 and SiO2-based fluoride-free experimental toothpastes on eroded human permanent dental enamel and evaluate the effectiveness of waiting periods between acid exposure and tooth brushing. Twelve volunteers wore palatal appliances containing human enamel blocks for two periods of five days each. The appliances were immers...

2004
Dong SUN Qing - Sheng WU

CaCO3 can crystallize as calcite, aragonite and vaterite. Calcite and aragonite are the most common biologically formed CaCO3 polymorphs, and vaterite is transformed into calcite via a solvent mediated process. Calcium carbonate makes an attractive model mineral for studies, since the morphology of CaCO3 has been the subject to control in biomineralization processes. And control of vaterite als...

2015
Yan-Hua Cai Yun-Chen Xie Li-Sha Zhao

Thermal decomposition behavior of Poly(L-lactic acid) (PLLA) and PLLA composites after different heat treatment were investigated using thermogravimetric analysis. Firstly, the thermal decomposition results of neat PLLA showed that the decomposition of PLLA was a first-order kinetic reaction, and thermal decomposition kinetics indicated that the heat treatment significantly affected activation ...

2007
Honghi Tran

A lime kiln is used to convert lime mud into lime for reuse in the causticizing plant of the kraft recovery process. Many of the problems encountered in lime kiln operations can be related to kiln chemistry, including TRS and SO2 emissions, dusting, ringing and refractory brick thinning. Understanding the composition and thermal behaviour of lime mud and the major chemical reactions involved is...

Journal: :Materials science & engineering. C, Materials for biological applications 2013
Yufei Ma Qingling Feng Xavier Bourrat

We report an interesting finding of calcium carbonate (CaCO3) crystal growth in the silk fibroin (SF) hydrogel with different concentrations by a simple ion diffusion method. The experimental results indicate that the CaCO3 crystals obtained from silk fibroin gels with low and high concentrations are all calcites with unusual morphologies. Time-dependent growth study was carried out to investig...

Journal: : 2022

This study assessed the influences of slope aspect on soil physicochemical properties (soil quality indicators) contiguous south-north facing slopes and hill plain (ridge crest) mid-mountain in Central Anatolia, having same climate, vegetation parent material. Anatolian black pine (Pinus nigra subsp. Pallasiana var. (Arnold)) was dominant, Cedar (Cedrus libani A. Richard), oak (Quercus sp.) wer...

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