scholarly journals Metabolic changes associated with pigmentary effector activity and pituitary removal in Xenopus lævis —II. Calcium and magnesium content of the serum

1931 ◽  
Vol 107 (753) ◽  
pp. 504-510 ◽  
Keyword(s):  
Guinea Pigs ◽  
Calcium Metabolism ◽  
Calcium Content ◽  
Magnesium Content ◽  
Blood Calcium ◽  
Parathyroid Extract ◽  
Calcium Effect ◽  
Effector Activity ◽  
Calcium And Magnesium ◽  
The Relationship

The relationship between the parathyroids and calcium metabolism has been well established. Removal of the parathyroids in mammals results in tetany accompanied by a fall in the blood calcium content (Cruickshank, Salvesen, etc.). Tetanic symptoms and their fatal consequences can be prevented in dogs by an addition of calcium lactate to the diet (Luckhardt and Goldberg) and Collip has found that parathyroid extract raises the calcium content of the blood in both normal and parathyroidectomised dogs. Later work has raised doubts as to the specificity of the calcium effect of parathyroid extract. Davies, Dickens and Dodds obtained the same effects form injections of insulin and also pituitary extracts. Contradictory results have been reported in connection with the thyroid, namely, a rise in calcium after thyroidectomy (Maxim an Vasilin), and a rise after thyroid feeding (Cahane). Mirvish and Bosman were able to produce a fall in blood calcium in rabbits both by injection of extract of suprarenal cortex and by injection of ovarian extract. Their work is in accord with that of Taylor and Caven who found a rise in serum calcium after double adrenalectomy, and that of Werner who found a rise after castration in guinea pigs and sheep.

scholarly journals STUDIES OF THE INORGANIC METABOLISM IN PNEUMONIA WITH ESPECIAL REFERENCE TO CALCIUM AND MAGNESIUM

1913 ◽  
Vol 17 (1) ◽  
pp. 71-82 ◽  
Author(s):  
Francis W. Peabody
Keyword(s):  
Calcium Content ◽  
Magnesium Content ◽  
The Body ◽  
Chlorine Content ◽  
Especial Reference ◽  
Inorganic Substances ◽  
Special Part ◽  
Calcium And Magnesium

During pneumonia the metabolism of inorganic substances deviates markedly from the normal. While chlorine, sodium, and calcium are retained in the body, potassium and magnesium are excreted normally or in excess. Two cases showed a definite loss of magnesium to the body in the febrile period. During the period of retention the chlorine content of the blood is distinctly lower than normally, the calcium content is apparently slightly lower, and the magnesium content tends also to be a little lower. The skin is shown, to play no special part in the chlorine retention. Since no organ or organs have been shown to store up large amounts of the retained substances, it is probable that they are spread diffusely throughout the body.

scholarly journals Contents of selected macroelements in soils, potatoes and fodder beets at variable soil reaction / Zawartość wybranych makroelementów w glebach oraz w ziemniakach i burakach pastewnych przy zmiennym odczynie gleby

2015 ◽  
Vol 66 (1) ◽  
pp. 3-9 ◽  
Author(s):  
Antoni Rogóż ◽  
Monika Tabak
Keyword(s):  
Phosphorus Content ◽  
Ph Value ◽  
Calcium Content ◽  
Magnesium Content ◽  
Soil Reaction ◽  
Potato Tubers ◽  
Ph Values ◽  
Root Crops ◽  
Calcium Magnesium ◽  
Calcium And Magnesium

Abstract The aim of the research was to determine the concentration of selected macroelements in soil and in root crops (potatoes and fodder beets) at a variable soil reaction. The changes in pH values in the studied soils influenced the content of these elements in soluble forms determined in 0.1 mol HCl·dm-3. A statistical analysis showed a positive relationship between the soil pH value and the calcium and magnesium contents in a form close to the total form, as well as the content of soluble forms of phosphorus, calcium, and magnesium. The content of the studied macroelements, i.e. phosphorus, calcium, magnesium in the cultivated fodder beets and potatoes depended on abundance and form in which the studied elements occurred in soil, and also on specie and analyzed part of the plant. Along with the increase in pH values of the an increase in the phosphorus content and reduction of the magnesium content in the roots and above-ground parts of the beets were found. The calcium content in the roots increased along with an increase in pH of the soils, whereas direction of changes in the content of this element in the petioles and laminae of the beets was not unambiguous. A slight decrease in the content of the studied elements in the potato tubers (along with the increase in pH of the soils) was found.

scholarly journals Extractable calcium, magnesium, potassium and sodium in diefferent peat types

1957 ◽  
Vol 29 (1) ◽  
pp. 41-55
Author(s):  
Jaakko Kivekäs ◽  
Armi Kaila
Keyword(s):  
Calcium Content ◽  
Nutrient Content ◽  
Magnesium Content ◽  
Individual Values ◽  
Land Quality ◽  
Surface Samples ◽  
Calcium Magnesium ◽  
Calcium And Magnesium ◽  
The Individual ◽  
Weak Tendency

An attempt was made to elucidate the content of plant-available calcium, potassium and magnesium in different kinds of virgin peat. The amounts of these cations extracted by 1 N ammonium chloride solution were supposed to give an estimate satisfactory for this purpose. Also the extractable sodium was determined. The material consisted of 208 samples mainly collected from Northern Finland. The variation in the content of extractable cations was high in all the peat groups. The individual values of one group were overlapping the range of other ones. The average calcium and magnesium contents of the Sp, CSp and SCp groups were somewhat lower than those of Cp, BCp and EuSCp groups. The same seems to be the case, with the content of extractable sodium whereas the moss peats tended to be slightly less poor in potassium than the peats of better quality. A more or less significant correlation existed in all the peat groups between the calcium content and the pH-values. The correlation was markedly lower for pH and extractable magnesium. A weak tendency to negative correlation could be noticed between pH and extractable potassium. The land quality and the calcium and magnesium content of all the surface samples were correlated with each other, although not very strongly. Within the different peat groups no correlation between these quantities could be found, except in one case. The scant supply of potassium in the surface samples did not show any connection with the land quality. The reasons responsible to the large variation of the nutrient content within a certain peat group were discussed. The fact was emphasized that on the basis of the identification of the kind of peat nothing reliable is known of the nutrient content of the sample.

scholarly journals THE CALCIUM AND MAGNESIUM CONTENT OF NORMAL URINE

1916 ◽  
Vol 28 (1) ◽  
pp. 237-240
Author(s):  
C.Ferdinand Nelson ◽  
W.E. Burns
Keyword(s):  
Magnesium Content ◽  
Calcium And Magnesium ◽  
Normal Urine

scholarly journals Alkalinity–silicon ratio as an assessment factor for the efficiency of silicate slags in wetland rice

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Thoppil Sreenivasan Sandhya ◽  
Nagabovanalli Basavarajappa Prakash
Keyword(s):  
Silicon Content ◽  
Chemical Properties ◽  
Magnesium Content ◽  
Wetland Rice ◽  
Agronomic Efficiency ◽  
Economic Production ◽  
Incubation Experiments ◽  
Calcium And Magnesium ◽  
Si Content ◽  
Assessment Factor

AbstractSilicate slags are one of the most widely used silicon (Si) source in agriculture. Even though the agronomic significance of slags has been demonstrated in several crops, only a few attempts were made to evaluate these Si sources based on their chemical composition. The main objective of this study was to characterize different silicate slags based on their chemical properties and to explore the effect of these chemical properties on the yield, and Si uptake in wetland rice, and dissolution of Si into the soil. Slags were characterised for pH, calcium and magnesium content (alkalinity, A), silicon content, 5 day Na2CO3 + NH4NO3 extractable Si content, and alkalinity to Si ratio (A/Si). Greenhouse and incubation experiments were also conducted using different silicate slags and wollastonite applied at the rate of 300 kg Si ha−1. Slags with A/Si < 3 were found to be ideal Si sources for the economic production of wetland rice and found consistent in increasing soil Si content and rice Si uptake. We conclude that the A/Si ratio of slags can be used as an important parameter to assess the agronomic efficiency of silicate slags in wetland rice.

Immunology of the inner ear: Response of the inner ear to antigen challenge

1983 ◽  
Vol 91 (1) ◽  
pp. 18-23 ◽  
Author(s):  
Jeffrey P. Harris
Keyword(s):  
Inner Ear ◽  
Blood Brain Barrier ◽  
Guinea Pigs ◽  
Keyhole Limpet Hemocyanin ◽  
Host Immunity ◽  
Brain Barrier ◽  
Antigen Challenge ◽  
Antibody Titers ◽  
Relationship Of ◽  
The Relationship

The relationship of the inner ear to host immunity and the immunoresponsiveness of the inner ear to antigen challenge were investigated. A radioimmunoassay was used to quantitate antibody titers to keyhole-limpet hemocyanin generated in the serum, perilymph, and CSF of guinea pigs following systemic or inner ear immunizations. The results of these experiments demonstrate (1) the blood-labyrinth barrier is analogous to the blood-brain barrier with respect to immunoglobulin equilibrium, (2) the inner ear is capable of responding to antigen challenge, and (3) the inner ear is an effective route for systemic immunization.

scholarly journals Relationship between macrofauna, mineralogy and exchangeable calcium and magnesium in Cerrado Oxisols under pasture

2009 ◽  
Vol 44 (8) ◽  
pp. 996-1001 ◽  
Author(s):  
Pedro Rodolfo Siqueira Vendrame ◽  
Robélio Leandro Marchão ◽  
Osmar Rodrigues Brito ◽  
Maria de Fátima Guimarães ◽  
Thierry Becquer
Keyword(s):  
Total Carbon ◽  
Soil Macrofauna ◽  
Exchangeable Calcium ◽  
Exchangeable Ca ◽  
Calcium Magnesium ◽  
Distrito Federal ◽  
Calcium And Magnesium ◽  
Taxonomic Groups ◽  
The Relationship ◽  
Soil Groups

The objective of this work was to assess the relationship between macrofauna, mineralogy and exchangeable calcium and magnesium in Cerrado Oxisols under pasture. Twelve collection points were chosen in the Distrito Federal and in Formosa municipality, Goiás state, Brazil, representing four soil groups with varied levels of calcium + magnesium and kaolinite/(kaolinite + gibbsite) ratios. Soil macrofauna was collected in triplicate at each collection point, and identified at the level of taxonomic groups. Macrofauna density showed correlation with contents of kaolinite, gibbsite and exchangeable Ca + Mg in the soils. Mineralogy and exchangeable Ca + Mg had significant effects on taxonomic groups and relative density of soil macrofauna. The termites (Isoptera) were more abundant in soils with low exchangeable Ca + Mg; earthworms (Oligochaeta), in soils with high levels of kaolinite; and Hemiptera and Coleoptera larvae were more abundant in gibbsitic soils with higher contents of total carbon.

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