scholarly journals Is there a Technique for the Determination of Sedimentation Rates based on Calcium Carbonate Content? A Comparative Study on the Southeastern Brazilian Shelf

2007 ◽  
Vol 47 (4) ◽  
pp. 649-656 ◽  
Author(s):  
Rubens Cesar Lopes Figueira ◽  
Moyses Gonsalez Tessler ◽  
Michel Michaelovitch De Mahiques ◽  
Marina M. Fukumoto
Keyword(s):  
Calcium Carbonate ◽  
Comparative Study ◽  
Carbonate Content ◽  
Sedimentation Rates ◽  
Calcium Carbonate Content

scholarly journals Determination of the Atterberg Limits of Eemian Gyttja on Samples with Different Composition

2020 ◽  
Vol 42 (2) ◽  
pp. 168-178 ◽  
Author(s):  
Katarzyna Goławska ◽  
Zbigniew Lechowicz ◽  
Władysław Matusiewicz ◽  
Maria Jolanta Sulewska
Keyword(s):  
Organic Matter ◽  
Calcium Carbonate ◽  
Organic Matter Content ◽  
Liquid Limit ◽  
Matter Content ◽  
Carbonate Content ◽  
Test Results ◽  
Plastic Limit ◽  
Calcium Carbonate Content

AbstractThe paper presents the results of laboratory tests of plastic limit wP and liquid limit wL of Eemian gyttja characterized by different organic matter content Iom and calcium carbonate content CaCO3. Comparison of the liquid limit wL determined with the use of the Casagrande apparatus wLC and a cone penetrometer with cones having apex angles of 60° wL60 and 30° wL30 is shown. Based on statistical analysis of the test results, single- and two-factor empirical relationships for evaluating the plastic limit wP and liquid limit wL of Eemian gyttja depending on the organic matter content Iom and/or calcium carbonate content CaCO3 are presented in this study.

scholarly journals Opto‐electrochemical Dissolution Reveals Coccolith Calcium Carbonate Content

2021 ◽  
Author(s):  
Minjun Yang ◽  
Christopher Batchelor-McAuley ◽  
Samuel Barton ◽  
Rosalind E.M. Rickaby ◽  
Heather A. Bouman ◽  
...  
Keyword(s):  
Calcium Carbonate ◽  
Carbonate Content ◽  
Electrochemical Dissolution ◽  
Calcium Carbonate Content

scholarly journals Classification of brown earths based on field and laboratory properties: Problematic issues and proposition of their solution

2019 ◽  
Vol 52 (2) ◽  
pp. 225
Author(s):  
Karolina Woźnica ◽  
Agnieszka Józefowska ◽  
Justyna Sokołowska ◽  
Ryszard Mazurek ◽  
Tomasz Zaleski
Keyword(s):  
Calcium Carbonate ◽  
Main Parameter ◽  
Ph Value ◽  
Soil Classification ◽  
Base Saturation ◽  
Carbonate Content ◽  
Field Guide ◽  
Content Determination

<p class="Default">In this paper, the current problems associated with the classification of brown earths, are presented. According to the Polish Soil Classification (PSC) (1989, 2011), base saturation is the main parameter for identifying eutrophic and dystrophic brown soils. In practice, however, it is not possible to determine the base saturation value in the field. Therefore, the aim of this study was to estimate the base saturation using a regression equation and create a field guide for brown earths, based on the pH value, measured using a Hellige indicator, and the calcium carbonate content. Determination of the pH ranges enabled the classification of brown earth types in the field. These results suggest that pH can be used as a proxy for base saturation especially in the field. A change in the hierarchy of soil (sub)types is proposed for the new Polish Soil Classification.</p>

Studies in the absorption and excretion of certain minerals by poultry. III. The influence of different levels of dietary calcium upon the retention of calcium, phosphorus, carbonate and chloride

1946 ◽  
Vol 36 (4) ◽  
pp. 283-288 ◽  
Author(s):  
Cyril Tyler
Keyword(s):  
Calcium Carbonate ◽  
Dietary Calcium ◽  
Egg Laying ◽  
Carbonate Content ◽  
Phosphorus Excretion ◽  
Calcium Carbonate Content ◽  
High Calcium ◽  
Calcium Phosphorus ◽  
Different Levels

1. The daily retention of calcium, carbonate, phosphorus and chloride was studied using four birds and changing the calcium carbonate content of the ration every 5 days for 15 days.2. It was shown that high calcium diets result in a much lower retention of calcium and thin-shelled eggs are produced.3. Retention of calcium was higher in the laying than in the non-laying bird when calcium carbonate was fed.4. High calcium diets depressed the retention of phosphorus, and in one case the retention was negative, even when no eggs were laid. Laying birds gave negative values for retention because of the heavy phosphorus excretion associated with egg laying.5. High calcium diets also depressed the retention of chloride, and on occasion led to negative retention values.

scholarly journals Experimental Study on the Preparation of Calibration Curve for the Measurement of Calcium Carbonate Content Using a Gasometric Method

2021 ◽  
Vol 16 (2) ◽  
pp. 143-157
Author(s):  
Hiroaki SANO ◽  
Mikio YAMADA ◽  
Hirofumi KITAJIMA ◽  
Tukasa KASHIWABARA ◽  
Mikihito FURUKAWA ◽  
...  
Keyword(s):  
Experimental Study ◽  
Calcium Carbonate ◽  
Calibration Curve ◽  
Carbonate Content ◽  
Calcium Carbonate Content
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