EFFECTS OF VARIOUS HORMONES ON THE AMOUNTS OF PHOSPHORUS CONTAINING FRACTIONS OF THE BRAIN (PHOSPHOLIPID, NUCLEOPROTEIN, TOTAL ACID-SOLUBLE PHOSPHORUS COMPOUNDS)1

Endocrinology ◽  
1954 ◽  
Vol 54 (6) ◽  
pp. 649-653 ◽  
Author(s):  
CLARA TORDA ◽  
HAROLD G. WOLFF
Keyword(s):  
Phosphorus Compounds ◽  
Total Acid ◽  
Brain Phospholipid ◽  
Phosphorus Containing ◽  
Soluble Phosphorus ◽  
The Brain

scholarly journals Alkaline O→N-transacylation. A new method for the quantitative deacylation of phospholipids

1981 ◽  
Vol 195 (1) ◽  
pp. 301-306 ◽  
Author(s):  
N G Clarke ◽  
R M C Dawson
Keyword(s):  
Water Soluble ◽  
Phosphorus Compounds ◽  
Complete Analysis ◽  
Catalytic Hydrolysis ◽  
Mammalian Tissue ◽  
Fatty Acid Amides ◽  
Phosphorus Containing ◽  
Soluble Phosphorus ◽  
Brain Phospholipids ◽  
Before And After

1. Quantitative O-deacylation of phospholipids has been achieved by incubation with a reagent containing monomethylamine, methanol and water. The reaction is primarily an O leads to N-transacylation with N-methyl fatty acid amides being formed. 2. The reagent can be removed easily by volatilization and under defined conditions no secondary decomposition of the phosphorus-containing deacylation products occurs. 3. The water-soluble phosphorus compounds derived by deacylation of mammalian tissue O-diacylated phospholipids have been completely separated by a single-dimensional paper ionophoresis with a volatile pH9 buffer. 4. The O-deacylated alkyl and alkenyl phospholipids have been examined by t.l.c. before and after catalytic hydrolysis with Hg2+. 5. A complete analysis of rat brain phospholipids by the above methods agrees closely with that obtained by other procedures.

Solid, slightly soluble phosphorus compounds as nutrient source in activated sludge treatment of forest industry wastewaters

1997 ◽  
Vol 35 (2-3) ◽  
pp. 131-138 ◽  
Author(s):  
Pirjo-Riitta Rantala ◽  
Hannu Wirola
Keyword(s):  
Activated Sludge ◽  
The Other ◽  
Phosphorus Compounds ◽  
Forest Industry ◽  
Phosphorus Concentration ◽  
Nutrient Source ◽  
Sludge Treatment ◽  
Grain Sizes ◽  
Soluble Phosphorus ◽  
The Mean

The aim of the study was to determine if solid, slightly soluble compounds can be used as nutrient source in activated sludge treatment plants instead of liquid phosphoric acid. Four different solid materials were tested in lab-scale solubility tests to find compounds which are least soluble. Two materials were chosen for further studies: apatite and raw phosphate. The use of apatite and raw phosphate as nutrient source was studied in lab-scale activated sludge reactors along with a control reactor where phosphorus was added in liquid form. The phosphorus dosage, measured as elementary phosphorus, was the same for all three reactors. The reactors were fed with pre-clarified chemi-thermomechanical pulp mill (CTMP) wastewater. There were no significant differences in the reductions of organic matter between the three reactors. The mean effluent concentration of total phosphorus was 3 mg P/l in the control reactor and less than 1 mg P/1 in the other two reactors. The soluble phosphorus concentration was more than 2 mg P/l in the control reactor and less than 0.5 mg P/l in the other two. Apatite was an even better nutrient source than raw phosphate. Further lab-scale tests were conducted using two different grain sizes of apatite. No significant differences were found between the studied grain sizes (<0.074 mm and 0.074 mm-0.125 mm). Apatite was then used in full-scale at a CTMP-mill two different times. The experiments showed that the mean concentrations of phosphorus can be reduced radically by using apatite as a nutrient source instead of liquid phosphorus. Solid phosphorus compounds are a viable alternative to reduce the phosphorus load from forest industry wastewater treatment plants.

Medicinal correction of cerebrovascular reactivity — a necessary component of the treatment of cerebral blood circulation disorders

1999 ◽  
Vol 80 (2) ◽  
pp. 94-96
Author(s):  
V. I. Danilov
Keyword(s):  
Blood Circulation ◽  
Organic Phosphorus ◽  
Experimental Studies ◽  
Cerebrovascular Reactivity ◽  
Cerebral Vessels ◽  
Regulatory Mechanisms ◽  
Phosphorus Compounds ◽  
Low Toxic ◽  
The Brain ◽  
Cerebral Blood Circulation

The results of experimental studies made it possible to draw a conclusion on the reality of cerebral vessels reactivity recovery using drugs with primary neurometabolic activity, in particular, dimephosphone, sermion and pyracetam. The advantages of low-toxic nonauticholinesterasic organic phosphorus compounds among the correctors of regulatory mechanisms of circular provision of the brain are shown.

scholarly journals The dynamics of acid-soluble phosphorus compounds in the course of winter and spring wheat germination under various thermic conditions. Part II. Labile phosphorus after hydrolysis of the acid-soluble fraction

2015 ◽  
Vol 24 (2) ◽  
pp. 297-308
Author(s):  
A. Barbaro
Keyword(s):  
Low Temperature ◽  
Phosphorus Content ◽  
Soluble Fraction ◽  
Phosphorus Compounds ◽  
Labile Phosphorus ◽  
Soluble Phosphorus ◽  
Germination Temperature ◽  
Wheat Germination ◽  
Labile P ◽  
Hydrolysis Of

The changes in labile phosphorus compounds content during germination of wheat were investigated. These compounds were determined in acid-soluble germ extracts separated into fractions according to the solubility of their barium salts. Low germination temperature was found to raise the labile phosphorus content in the fraction of insoluble barium salts. If we assume that labile P of this fraction consisted mainly of adenosinedi- and triphosphates, it would seem that the rise, in the ATP and ADP level under the influence of low temperature may be essential for initiating flowering in winter varieties.

scholarly journals The metabolism of polyphosphoinositides in hen brain and sciatic nerve

1969 ◽  
Vol 111 (2) ◽  
pp. 157-165 ◽  
Author(s):  
A. Sheltawy ◽  
R. M. C. Dawson
Keyword(s):  
Sciatic Nerve ◽  
Previous Investigation ◽  
Relative Rate ◽  
Specific Radioactivity ◽  
Brain Slices ◽  
Soluble Phosphorus ◽  
Ethanolamine Plasmalogen ◽  
32P Incorporation ◽  
The Brain

1. The distribution of individual phospholipids was determined in hen brain and compared with that in sciatic nerve obtained in a previous investigation. Sciatic nerve is more enriched in the myelinic phospholipids ethanolamine plasmalogen, phosphatidylserine and sphingomyelin, but it contains relatively less triphosphoinositide, and much less diphosphoinositide, than the brain. 2. The course of incorporation of intraperitoneally injected 32P into the acid-soluble phosphorus, phosphoinositides and total phospholipids of hen brain and sciatic nerve was followed. Although the maximum specific radioactivity in sciatic nerve of acid-soluble phosphorus is 4·5 times, and that of triphosphoinositide six times, that in the brain, the relative rate of triphosphoinositide phosphorus synthesis per gram of brain is three times that in sciatic nerve. 3. Administration of the demyelinating agent tri-o-cresyl phosphate to hens has no significant effect on the amounts or the rate of 32P incorporation into the total phospholipids of the sciatic nerve. However, the rate of incorporation of 32P into triphosphoinositide, although not its concentration, is raised from the first day after administration of the drug and remains thus 13 and 23 days later. 4. The incorporation of 32P into polyphosphoinositides of hen brain slices in vitro was studied. The recovery of triphosphoinositide from the slices is markedly increased in the presence of EDTA, although the rate of incorporation of 32P is unaffected. The incorporation of 32P is dependent on the presence of Mg2+ and Ca2+ in the medium, and is decreased when Na+ is replaced with K+ or cholinium ions.

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