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.

Observations on the mineral metabolism of pullets. II

1936 ◽  
Vol 26 (1) ◽  
pp. 85-100 ◽  
Author(s):  
R. H. Common
Keyword(s):  
Calcium Carbonate ◽  
Egg Production ◽  
Mineral Metabolism ◽  
Ammonium Phosphate ◽  
Ammonia Nitrogen ◽  
Egg Laying ◽  
Phosphorus Metabolism ◽  
Phosphorus Excretion ◽  
Calcium Phosphorus ◽  
Digestible Protein

1. Where heavy phosphorus excretion accompanies egg laying in the pullet the excretion of ammonia nitrogen is simultaneously increased. It is probable that this indicates an excretion of excess phosphate in the urine as ammonium phosphate.2. It is shown that heavy phosphorus excretion does not accompany egg laying provided the calcium carbonate intake is sufficiently high.3. The origin of the excess of phosphorus excretion is discussed in relation to calcium-phosphorus metabolism.4. Pullets on a ration containing 5 per cent, calcium carbonate laid eggs containing a higher percentage of P2O5 than pullets receiving a similar ration but from which the calcium carbonate supplement was omitted.5. Some evidence is put forward in support of the view that current standards pitch the requirements of digestible protein for egg production at too high a level.

Analysis of the Causes of High Calcium Carbonate Content in Coal-Fired Power Plant Desulfurization Gypsum

2013 ◽  
Vol 781-784 ◽  
pp. 2582-2585
Author(s):  
Xue Ying Zhang ◽  
Xiao Xiang Zhou ◽  
Xue Feng Dong
Keyword(s):  
Calcium Carbonate ◽  
Power Plant ◽  
Power Plants ◽  
Carbonate Content ◽  
Calcium Carbonate Content ◽  
High Calcium ◽  
Powder Fineness ◽  
Lime Powder ◽  
Lime Stone

In this paper, the problem of high calcium carbonate content of desulfurization gypsum using limestone - gypsum wet desulphurization technology in coal-fired power plants questions, recommendations in running process from the control of absorption tower pH, lime stone powder, lime powder fineness activity to solve the above problems.

Design of On-Site Treatment Systems in Caliche Soils

1993 ◽  
Vol 28 (10) ◽  
pp. 83-87
Author(s):  
H. M. Liljestrand ◽  
S. M. Parten
Keyword(s):  
Calcium Carbonate ◽  
Organic Carbon ◽  
Experimental Studies ◽  
Organic Content ◽  
Carbonate Content ◽  
Organic Carbon Content ◽  
Loading Rates ◽  
Calcium Carbonate Content ◽  
High Calcium ◽  
Drain Field

Caliche soils, weathered limestone soils of high calcium carbonate content and and low organic content, are common in regions with limestone sedimentary geology and arid to semi-arid climate. Currently, there are no standards other than hydraulic soil properties for the design and construction of on-site wastewater treatment systems in caliche soils. Experimental studies were performed to investigate biological transformation rates for organic carbon to inorganic carbon and organic nitrogen to nitrate, using four different caliche soils and the range of recommended hydraulic loading rates. The experimental results indicate that oxygen demanding materials readily decay over short distances in caliche soils. Efficiency of removal for TOC was >97%. However in three of the four caliche soils, nitrate concentrations were significantly higher than the background and the control cases. The high calcium carbonate content of the caliche soils leads to solutions well buffered with respect to pH and alkalinity. Nitrification rates are very rapid in these soils which are buffered at the optimum pH range for Nitrosomonas growth. The low organic carbon content of caliche soils results in low denitrification rates. Nitrate in the effluent is the limiting pollutant in the determination of appropriate loading rates, drain field area, and land requirements. Phosphate and metal aqueous concentrations are acceptably low and are limited by solubility control in the open system equilibrium model.

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 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

scholarly journals Effects of In-Situ Filler Loading vs. Conventional Filler and the Use of Retention-Related Additives on Properties of Paper

Materials ◽  
2020 ◽  
Vol 13 (22) ◽  
pp. 5066
Author(s):  
Maria Emiliana Fortună ◽  
Andrei Lobiuc ◽  
Lucian-Mihai Cosovanu ◽  
Maria Harja
Keyword(s):  
Mechanical Properties ◽  
Calcium Carbonate ◽  
Filler Loading ◽  
Carbonate Content ◽  
Sem Images ◽  
Paper Properties ◽  
Calcium Carbonate Content ◽  
Optical And Mechanical Properties ◽  
Filler Retention

In the present paper, aspects concerning the obtained and characterization of additive systems used for maximizing filler retention, and the effects on paper properties, were investigated. The effects of retention additives over properties of paper, containing fibers from in-situ loading (IS-CCP), were analyzed against the effects of additives over properties of paper containing fibers from conventional loading, obtained by the addition of calcium carbonate in precipitated form (CCP). The physico-mechanical properties were analyzed by various analyses and investigations: calcium carbonate content, X-ray diffraction, scanning electron microscopy (SEM) images, optical and mechanical properties, in order to develop the best systems of retention additives for obtaining higher retention loads for making paper with high content of nano-filler material. The obtained results reveal that at the same level of calcium carbonate content, all paper samples with in-situ loading had higher the optical and mechanical properties than the paper obtained by conventional loading in all cases the additives studied. For all studied properties, nanoparticles had a positively influence over paper properties.

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