Effect of extreme acid and alkali treatment on soil variable charge

The surface configuration of hyphal walls and various fractions of the wall were analyzed by electron microscopy using carbon–platinum replicas. Fractionation was carried out with both enzymes and chemical solvents. Laminarinase with or without protease and acid with alkali removed the acid- and alkali-soluble glucans revealing an underlying pattern of microfibrils. The combination of cellulase, laminarinase, and protease essentially dissolved the hyphae. The cellulose solvent cadoxen removed the microfibrillar pattern which was exposed following acid and alkali treatment. The acid-soluble fraction is amorphous, the alkali-soluble and the insoluble residuum is faintly microfibrillar, and the cellulose II preparation is strongly microfibrillar. Both the cellulose I and the chitinlike fractions are uniformly microfibrillar. Morphologically, the wall consists of an outer matrix of β-1,3- and β-1,6-glucans covering an inner cellulosic protein core. Both a diagrammatic and molecular model are proposed.

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PROSTAGLANDINS IN BRAIN AND THE RELEASE OF PROSTAGLANDIN-LIKE COMPOUNDS FROM THE CAT CEREBELLAR CORTEX

Canadian Journal of Physiology and Pharmacology ◽

10.1139/y65-045 ◽

1965 ◽

Vol 43 (3) ◽

pp. 445-450 ◽

Cited By ~ 66

Author(s):

F. Coceani ◽

L. S. Wolfe

Keyword(s):

Brain Tissue ◽

Alkali Treatment ◽

Water Soluble ◽

Rat Stomach ◽

Tissue Extracts ◽

Slow Type ◽

Stomach Fundus ◽

Acid And Alkali Treatment ◽

Layer Chromatography ◽

Isolated Rat

A water-soluble lipid material resistant to acid and alkali treatment was found in perfusates and extracts of brain tissue, which induced contraction of the 'slow type' on the isolated rat stomach fundus. The material isolated from brain tissue extracts behaved in solvent partition systems like the prostaglandin compounds and could be purified by silicic acid and thin-layer chromatography. The smooth-muscle-stimulating activity is likely due to the trihydroxyprostaglandin compounds.

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Preparation of PVDF Hollow Fiber Membranes Using SiO2Particles: The Effect of Acid and Alkali Treatment on the Membrane Performances

Industrial & Engineering Chemistry Research ◽

10.1021/ie102012v ◽

2011 ◽

Vol 50 (5) ◽

pp. 3035-3040 ◽

Cited By ~ 77

Author(s):

N. Awanis Hashim ◽

Yutie Liu ◽

K. Li

Keyword(s):

Hollow Fiber ◽

Alkali Treatment ◽

Hollow Fiber Membranes ◽

Fiber Membranes ◽

Acid And Alkali Treatment

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Effects of Acid and Alkali Treatment on the Properties of Proteins Recovered from Whole Gutted Grass Carp (Ctenopharyngodon idellus) Using Isoelectric Solubilization/Precipitation

Journal of Food Quality ◽

10.1111/jfq.12236 ◽

2016 ◽

Vol 39 (6) ◽

pp. 707-713 ◽

Cited By ~ 7

Author(s):

Dunxi Chen ◽

Jingwen Song ◽

Hong Yang ◽

Shanbai Xiong ◽

Youming Liu ◽

...

Keyword(s):

Grass Carp ◽

Alkali Treatment ◽

Ctenopharyngodon Idellus ◽

Acid And Alkali Treatment

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Dissolved organic and inorganic phosphorus compounds in pig slurry: effect of drying

The Journal of Agricultural Science ◽

10.1017/s0021859600048577 ◽

1978 ◽

Vol 90 (1) ◽

pp. 39-45 ◽

Cited By ~ 16

Author(s):

R. G. Gerritse ◽

R. Eksteen

Keyword(s):

Molecular Weight ◽

High Molecular Weight ◽

Organic Molecules ◽

Organic Phosphorus ◽

Alkali Treatment ◽

Gel Filtration ◽

Inorganic Phosphorus ◽

Phosphorus Compounds ◽

Pig Slurry ◽

Acid And Alkali Treatment

SUMMARYFrom gel filtration studies it has been found that more than 50% of organic phosphorus dissolved in pig slurry is contained in compounds of high molecular weight. Various ions, e.g. calcium, copper, orthophosphate, are bound by these compounds. From the purine and pyrimidine base composition and resistance to acid and alkali treatment it follows that these organic compounds probably are complexes derived from polydeoxyribonucleotides (DNA).The effect of drying pig slurry at various temperatures (0–100 °C) on the solubility of phosphorus, calcium and copper after redispersion of the dried slurry was investigated. The solubility of organic phosphorus was not affected by drying and redispersion in water, but the amount of phosphorus contained in dissolved organic molecules of high molecular weight decreased on drying at higher temperatures. The solubility of copper was also not affected by heat treatment. The solubility of inorganic phosphorus is mainly related to the solubility constants of mineral phosphates. On the other hand the total solubility of the cations involved is determined by complex formation.

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