The search for sustainable resources remains a subject of global interest and the conversion abundantly available bivalve shell wastes to advanced materials is an intriguing method. By grinding, calcium carbonate (CaCO3) powder was obtained from each bivalves (cockle, mussel, oyster) as revealed by FTIR XRD results. Each individual reacted with H3PO4 H2O prepare Ca(H2PO4)2·H2O giving anorthic c...

IMPLICATIONS FOR IMPACT-INDUCED DEGASSING OF CaCO3. K. Ishibashi, T. Yagi, and T. Matsui, Dept. of Earth Planet. Sci., Univ. of Tokyo (7-3-1, Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan; [email protected]), 2 Institute for Solid State Physics, Univ. of Tokyo (5-1-5, Kashiwanoha, Kashiwa, Chiba, 277-8581, Japan), Dept. of Complexity Sci. and Eng., Univ. of Tokyo (5-1-5, Kashiwanoha, Kash...

In the present paper the yield and soil spatial variability in an apple orchard was studied. Apples were collected manually and placed in plastic bins along the tree rows. Yield per ten trees was weighted and the geographical position in the centre of the ten trees was recorded, using a GPS, in order to create the yield map. The orchard was divided in management zones with the Management Zone A...

This article reports a successful removal of CaCO3 from snail and periwinkle shells for the purpose of producing high quality chitin for possible application as bio-fillers in bone fixation materials. Experiment was designed with varying concentrations of acid and alkali for demineralization, deproteinization and deacetylation of the samples. Thermal characteristics, morphology, degree of de-ac...

Objective: Periodontal disease is an essential phenomenon in human health. Oral pathogens can cause severe break which may show the way to serious issues like chronic obstructive pulmonary and cardiovascular diseases. Therefore, aim of this study evaluate antibacterial effect a series nanoparticles on oral pathogens.Methods: In study, activity such as MWCNT, CuO2, CaCO3, SiO2, Al2O3, MgO ZrO2 a...

phosphorus (p) sorption in soils is a key process governing its availability to crops. there has been scanty information available on the p sorption characteristics of calcare-ous soils of western azarbaijan province, iran. in this study, p sorption characteristics and their relationship to soil properties were determined in 36 soil samples belonging to 15 agricultural soil series located in th...

A CaCO3-crystal-growth inhibitor was isolated from human pancreatic stones by using EDTA demineralization, followed by DEAE-Trisacryl chromatography. The isolated inhibitor was found to be a phosphoglycoprotein with Mr 14017 and having an unusual chemical composition. It is characterized by a high (42%) acidic amino acid content, but lacks methionine and gamma-carboxyglutamic acid. The protein ...

General comments. This study presents a good overview of the CaCO3 polimorph precipitation in corals skeletal formation, investigating the ability of corals to switch from aragonite to calcite precipitation, especially in their early developmental stages in response to changing seawater chemistry. Mg/Ca ratio, temperature and pCO2 has been already recognized as the most important factor affecti...