نتایج جستجو برای: lime caco3

تعداد نتایج: 9260  

Journal: :Science 2004
Richard A Feely Christopher L Sabine Kitack Lee Will Berelson Joanie Kleypas Victoria J Fabry Frank J Millero

Rising atmospheric carbon dioxide (CO2) concentrations over the past two centuries have led to greater CO2 uptake by the oceans. This acidification process has changed the saturation state of the oceans with respect to calcium carbonate (CaCO3) particles. Here we estimate the in situ CaCO3 dissolution rates for the global oceans from total alkalinity and chlorofluorocarbon data, and we also dis...

Journal: :مرتع و آبخیزداری 0
معصومه عباسی خالکی دانشگاه آزاد اسلامی، واحد کرج، باشگاه پژوهشگران جوان و نخبگان، کرج، ایران محمد جعفری : استاد دانشکدة منابع طبیعی دانشگاه تهران علی طویلی دانشیار دانشکدة منابع طبیعی دانشگاه تهران مهدی معمری : دانشگاه آزاد اسلامی، واحد کرج، باشگاه پژوهشگران جوان و نخبگان، کرج، ایران

to find the effect of atriplex canescens on soil chemical properties, two adjacent areas, each with and area of 1 ha, were selected in hossein abad hapeshloo shahryar. in one area it was planted atriplex canescens in 2003 while the later one without atriplex canescens was considered as control area. to sample soil, random- systematic method was used along 3 transects with a length of 100 m. in ...

2017
Mengen Zhao Zhenhua Chen Xinyan Lv Kang Zhou Jie Zhang Xiaohan Tian Xiuli Ren Xifan Mei

Core-shell structured CaCO3 microspheres (MSs) were prepared by a facile, one-pot method at room temperature. The adsorbent dosage and adsorption time of the obtained CaCO3 MSs were investigated. The results suggest that these CaCO3 MSs can rapidly and efficiently remove 99-100% of anionic dyes within the first 2 min. The obtained CaCO3 MSs have a high Brunauer-Emmett-Teller surface area (211.7...

Journal: :Hypertension 1989
C Nowson T Morgan

Forty-seven patients with mild hypertension and 48 normotensive patients entered a blinded, parallel study in which they received a placebo, 10 mmol/day calcium carbonate (CaCO3), or 20 mmol/day CaCO3. There were no significant differences in blood pressure changes among the groups. In the hypertensive group and in patients with the highest blood pressure there were individual falls in systolic...

Journal: :تحقیقات آب و خاک ایران 0
مجید دانش حسینعلی بهرامی سیدکاظم علوی پناه علی اکبر نوروزی

homogeneity and uniformity of soil particles is a most potent factor which affects soil spectral signatures. geometric standard deviation of soil particles (?g) exhibits the homogeneity of soil components. this study presents the influence of ?g on spectral studying of soil geometric mean particle diameter as well as lime. the study was conducted in pol-e-dokhtar using the data set of lissiii-p...

Journal: :ACS Engineering Au 2023

In the efforts to corroborate safer environmental CO2 mitigation strategies, herein, we elucidate engineered practices that convert absorbed in a solid material and its utilization path of product synthesis. this way, cheaper lime material, primary calcium resource, when exposed capture, storage (CO2CSM) prepared by using 1,2-ethylenediamine 1, 4-butanediol resulted formation controlled vaterit...

Journal: :Geology 2022

Abstract In this experimental study, we documented the formation of strongly ultrabasic and ultracalcic melts through interaction melilititic basanitic with calcite. Three to moderately SiO2-undersaturated volcanic rocks from Bohemian Massif (central Europe) were mixed 10, 30, 50 wt% CaCO3 melted at 1100, 1200, 1300 °C 2 kbar evaluate maximum amount carbonate that can be assimilated by natural ...

2013
Sada Sahu

Solidia CementTM is a non-hydraulic cement composed primarily of low-lime containing calcium silicate phases such as wollastonite / pseudowollastonite (CaO·SiO2), and rankinite (3CaO·2SiO2). This contrasts the high-lime alite (3CaO·SiO2), belite (2CaO·SiO2), tricalcium aluminate (3CaO·Al2O3), tetracalcium aluminum ferrite (4CaO·Al2O3·Fe2O3), and gypsum (CaSO4·2H2O) phases that comprise ordinary...

Journal: :Journal of composites science 2021

The effect of hydrogels containing nanosilica (NSi) on the autogenous shrinkage, mechanical strength, and electrical resistivity cement pastes was studied. interaction between surrounding cementitious matrix examined using thermogravimetric analysis (TGA), Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM). addition decreased shrinkage in this reduction showed a ...

2018
Xiangshuo Wang Ling Shi Junying Zhang Jue Cheng Xiaodong Wang

This paper reports a new route to synthesize calcium carbonate (CaCO3)-based nanoscale ionic materials (NIMs) via an in situ formation method to form the CaCO3 nanoparticles with a polysiloxane quaternary ammonium salt (PQAC) corona (PQAC-CaCO3 nanoparticles), followed by an ionic exchange reaction to fabricate a poly(ethylene glycol)-tailed sulfonate anion (NPEP) canopy. The chemical compositi...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید