THE MUCOPOLYSACCHARIDES OF HUMAN SKIN

1949 ◽  
Vol 27e (1) ◽  
pp. 43-57 ◽  
Author(s):  
R. H. Pearce ◽  
E. M. Watson
Keyword(s):  
Hyaluronic Acid ◽  
Sulphuric Acid ◽  
Human Skin ◽  
Sugar Content ◽  
Amino Sugar ◽  
Acid Fraction ◽  
Fresh Tissue ◽  
Mean Values ◽  
Technical Errors ◽  
Reducing Substances

The mean values and standard deviations for the concentrations of the hyaluronic acid and chondroitin sulphuric acid fractions isolated from 11 specimens of human skin were 24.5 ± 5.7 and 26.2 ± 4.7 mgm. per 100 gm. of fresh tissue, respectively.The individual differences in the concentrations of these substances were masked by the technical errors. The small variations in moisture and ash content of the skin did not contribute appreciably to the uncertainty of the concentration values. The purity of the products, determined by their amino sugar content, approximated 60%, which value compared favorably with those obtained by other workers.The content of hexosamine and uronic acid identified both fractions as acid mucopolysaccharides. The release of reducing substances, including N-acetyl hexosamine, from the hyaluronic acid fraction by hyaluronidase paralleled the action of the enzyme upon hyaluronate from umbilical cord. The chondroitin sulphuric acid fraction, which was relatively resistant to the action of hyaluronidase, was assumed to be identical with the chondroitin sulphatelike substance that Meyer and Chaffee isolated from pig skin.

Effects of wall inhibitors on thymineless Streptococcus faecalis

1974 ◽  
Vol 20 (8) ◽  
pp. 1185-1187 ◽  
Author(s):  
J. G. Bisaillon ◽  
J. de Repentigny ◽  
L. G. Mathieu
Keyword(s):  
Free Amino ◽  
Death Rate ◽  
Sugar Content ◽  
Amino Sugar ◽  
Streptococcus Faecalis ◽  
Inhibition Of Growth ◽  
Thymineless Death

Thymine-requiring (thy−) mutants of Streptococcus faecalis and S. faecalis var. zymogenes were isolated by selection with aminopterin. D-Cycloserine increased the thymineless death rate of a S. faecalis thy− strain, whereas bacitracin, penicillin, and vancomycin decreased it. A S. faecalis var. zymogenes thy− strain behaved similarly, except that penicillin increased its thymineless death rate. D-Alanine reversed the effect of D-cycloserine on both strains. Because of the specificity of the inhibition, our observations suggest that mucopeptide synthesis occurs in S. faecalis not only during growth but also during thymineless death. The variations in free amino sugar content resulting from D-cycloserine inhibition of growth and thymineless death also support this conclusion.

In vivo Bio-Integration of Three Hyaluronic Acid Fillers in Human Skin: A Histological Study

Dermatology ◽  
2013 ◽  
Vol 228 (1) ◽  
pp. 47-54 ◽  
Author(s):  
Christian Tran ◽  
Pierre Carraux ◽  
Patrick Micheels ◽  
Gürkan Kaya ◽  
Denis Salomon
Keyword(s):  
Hyaluronic Acid ◽  
Human Skin ◽  
Histological Study

A method for the hyaluronic acid synthetase assay in human skin

1982 ◽  
Vol 273-273 (3-4) ◽  
pp. 199-204 ◽  
Author(s):  
Hannu Larjava ◽  
Jari Vaarala ◽  
Heikki Saarni ◽  
Risto Penttinen ◽  
V�in� K. Hopsu-Havu
Keyword(s):  
Hyaluronic Acid ◽  
Human Skin

Improved Preservation of the Tissue Surrounding Percutaneous Devices by Hyaluronic Acid and Dermatan Sulfate in a Human Skin Explant Model

2009 ◽  
Vol 38 (3) ◽  
pp. 1098-1110 ◽  
Author(s):  
Antonio Peramo ◽  
Cynthia L. Marcelo ◽  
Steven A. Goldstein ◽  
David C. Martin
Keyword(s):  
Hyaluronic Acid ◽  
Human Skin ◽  
Dermatan Sulfate

scholarly journals Pectin Strength of Common Varieties of Plantain Peels Used in the Production of Jam/Marmalade

2020 ◽  
pp. 1-9
Author(s):  
O. M. Akusu ◽  
B. S. Chibor
Keyword(s):  
Crude Protein ◽  
Sugar Content ◽  
Chemical Properties ◽  
Carbohydrate Content ◽  
French Horn ◽  
Gelling Agent ◽  
Mean Values ◽  
Total Sugar Content ◽  
Overall Acceptability ◽  
Low Protein

The pectin strength of peels from four plantain cultivars; Horn Plantain (sample B), French Plantain (sample C), False horn Plantain (sample D), and French Horn Plantain (sample E) and its effect on Jam and Marmalade produced was investigated. Pectin was extracted from the plantain peels with distilled water and EDTA at pH 4.3 and 60°C, precipitated with acidified ethyl alcohol and 0.5N HCl. The pectin strength of peels from the French plantain (sample B) was higher than the others. Peels from False horn and French horn plantain both had medium pectin strength. Jam and marmalade produced were evaluated for proximate composition, chemical properties and acceptability. Jam and Marmalade from sample C were high in moisture content with mean values of 43.19 and 41.33%, respectively. Sample E (in both variants) had significant high crude protein (0.33%) compared to all other samples. Marmalade samples had crude fiber values ranging from 0.75% for sample B to 2.25% for sample E. The ash and carbohydrate content of jam and marmalade produced with pectin from French Plantain, False Horn Plantain and French Horn Plantain were significantly higher than the commercial jam and marmalade. Crude fat ranged from 0.45 to 1.15% for both variants (jam and marmalade). They both recorded low protein contents ranging from 0.14 to 0.32% and 0.16 to 0.33% respectively but high carbohydrate content ranging from 50.97 to 67.48% and 52.29 to 69.41% respectively. pH content maintains 3.0-3.10% for all samples. Total sugar content ranged from 55.00 to 63.80% for both Jam and Marmalade. Sample C was most preferred in terms of colour, taste, aroma, appearance, spreadability and overall acceptability, for Jam and Marmalade. All its sensory attributes were compared favorably with the commercial brands. Pectin extracted from plantain peel is strongly recommended for use as gelling agent in Jam and Marmalade production.

Chemical characteristics of Lucerne silage treated by urea and sulphuric acid

2007 ◽  
Vol 2007 ◽  
pp. 229-229
Author(s):  
Malek Hoseein Delavar ◽  
Mohsen Daneshe Mesgaran ◽  
Mohhamad Hassan Jahandar
Keyword(s):  
Chemical Composition ◽  
Sulphuric Acid ◽  
Sugar Content ◽  
Soluble Sugar ◽  
Weather Condition ◽  
Buffering Capacity ◽  
High Moisture ◽  
Before And After ◽  
Silage Additives ◽  
Stem Structure

Although Lucerne hay is common using method of Lucerne forage but weather condition always is not suitable to provide it. Besides Lucerne forage due to high buffering capacity because of the tubular and hollow stem structure, low soluble sugar content, high moisture and high protein content is the most difficult to ensile. Therefore, response to silage additives (such as urea and sulphuric acid) or preservatives may be great with legume forage. Experimental evidence indicates that there is main different about chemical composition of Lucerne silage before and after ensiling. This study was conducted to compare of Chemical composition of Lucerne silages treated without or by urea and sulphuric acid.

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