Naturally occurring low molecular weight inhibitors of neutral proteinases from PMN-granulocytes and of kallikreins

1978 ◽  
Vol 8 (1-2) ◽  
pp. 57-64 ◽  
Author(s):  
Hans Fritz ◽  
Hans Schiessler ◽  
Reinhard Geiger ◽  
Kjell Ohlsson ◽  
Karl Hochstrasser
Keyword(s):  
Molecular Weight ◽  
Low Molecular Weight ◽  
Naturally Occurring

scholarly journals Naturally occurring low-molecular-weight peptides from the blowfly Phormia regina

1968 ◽  
Vol 110 (4) ◽  
pp. 771-773 ◽  
Author(s):  
R. P. Bodnaryk ◽  
L. Levenbook
Keyword(s):  
Molecular Weight ◽  
Phormia Regina ◽  
Low Molecular Weight ◽  
Naturally Occurring

Freely occurring α-l-aspartyl-l-histidine, β-alanyl-l-histidine (carnosine), α-l-aspartyl-α-l-lysine, l-asparaginyl-α-l-lysine, α-l-glutamyl-α-l-lysine, l-isoleucyl-α-l-lysine, l-seryl-α-l-lysine, l-valyl-α-l-lysine and glycyl-α-l-lysyl-α-l-lysine were identified in young larvae (second and third instars) of the blowfly (Phormia regina).

scholarly journals An Evaluation of the Possible Uses of CNT in Flow Conditions for Removing Humic Substances from Water

Water ◽  
2021 ◽  
Vol 13 (16) ◽  
pp. 2160
Author(s):  
Małgorzata Wolska ◽  
Zbigniew Ferenc ◽  
Anna Solipiwko-Pieścik
Keyword(s):  
Carbon Nanotubes ◽  
Molecular Weight ◽  
Humic Substances ◽  
Organic Substance ◽  
Active Carbon ◽  
Adsorption Process ◽  
Low Molecular Weight ◽  
Flow Conditions ◽  
Naturally Occurring ◽  
Unit Effectiveness

This study concerns an evaluation of humic substance removal during an adsorption process on three sorbents: two consisting of carbon nanotubes embedded on a polymer (polypropylene and polyethylene) and granulated active carbon as a reference. The results that were obtained show a significantly lower organic substance removal effectiveness in the case of sorbents containing carbon nanotubes, with an insignificantly lower unit effectiveness (mg/g) of the nanosorbents during first two hours of adsorption. Unfortunately, nanosorbents only allow removing substances with a low molecular weight and high aromaticity, which significantly reduces the possibility of its use in technical conditions for naturally occurring water and the sorption capacity nanotubes were significantly lower in comparison to the GAC.

Clinical and Veterinary Isolates ofSalmonella enterica Serovar Enteritidis Defective in Lipopolysaccharide O-Chain Polymerization

1999 ◽  
Vol 65 (5) ◽  
pp. 2195-2201 ◽  
Author(s):  
J. Guard-Petter ◽  
C. T. Parker ◽  
K. Asokan ◽  
R. W. Carlson
Keyword(s):  
Molecular Weight ◽  
Genetic Basis ◽  
Low Molecular Weight ◽  
Gas Liquid Chromatography ◽  
O Antigen ◽  
Phage Types ◽  
Naturally Occurring ◽  
Serovar Typhimurium ◽  
Chain Polymerization ◽  
Isogenic Strains

ABSTRACT Twelve human and chicken isolates of Salmonella enterica serovar Enteritidis belonging to phage types 4, 8, 13a, and 23 were characterized for variability in lipopolysaccharide (LPS) composition. Isolates were differentiated into two groups, i.e., those that lacked immunoreactive O-chain, termed rough isolates, and those that had immunoreactive O-chain, termed smooth isolates. Isolates within these groups could be further differentiated by LPS compositional differences as detected by gel electrophoresis and gas liquid chromatography of samples extracted with water, which yielded significantly more LPS in comparison to phenol-chloroform extraction. The rough isolates were of two types, the O-antigen synthesis mutants and the O-antigen polymerization (wzy) mutants. Smooth isolates were also of two types, one producing low-molecular-weight (LMW) LPS and the other producing high-molecular-weight (HMW) LPS. To determine the genetic basis for the O-chain variability of the smooth isolates, we analyzed the effects of a null mutation in the O-chain length determinant gene, wzz (cld) of serovar Typhimurium. This mutation results in a loss of HMW LPS; however, the LMW LPS of this mutant was longer and more glucosylated than that from clinical isolates of serovar Enteritidis. Cluster analysis of these data and of those from two previously characterized isogenic strains of serovar Enteritidis that had different virulence attributes indicated that glucosylation of HMW LPS (via oafR function) is variable and results in two types of HMW structures, one that is highly glucosylated and one that is minimally glucosylated. These results strongly indicate that naturally occurring variability inwzy, wzz, and oafR function can be used to subtype isolates of serovar Enteritidis during epidemiological investigations.

A high-performance oil-free backing pump for electron microscopes

1978 ◽  
Vol 36 (1) ◽  
pp. 110-111
Author(s):  
G.K.W. Balkau ◽  
E. Bez ◽  
J.L. Farrant
Keyword(s):  
Molecular Weight ◽  
Electron Microscope ◽  
Hot Spots ◽  
High Performance ◽  
Carbonaceous Material ◽  
Contamination Rate ◽  
Low Molecular Weight ◽  
Principal Source ◽  
Rotary Pumps ◽  
Electron Microscopes

The earliest account of the contamination of electron microscope specimens by the deposition of carbonaceous material during electron irradiation was published in 1947 by Watson who was then working in Canada. It was soon established that this carbonaceous material is formed from organic vapours, and it is now recognized that the principal source is the oil-sealed rotary pumps which provide the backing vacuum. It has been shown that the organic vapours consist of low molecular weight fragments of oil molecules which have been degraded at hot spots produced by friction between the vanes and the surfaces on which they slide. As satisfactory oil-free pumps are unavailable, it is standard electron microscope practice to reduce the partial pressure of organic vapours in the microscope in the vicinity of the specimen by using liquid-nitrogen cooled anti-contamination devices. Traps of this type are sufficient to reduce the contamination rate to about 0.1 Å per min, which is tolerable for many investigations.

Low-molecular-weight heparin in the prevention and treatment of thromboembolic disorders

1998 ◽  
Vol 1 (5) ◽  
pp. 166-174 ◽  
Author(s):  
Evelyn R Hermes De Santis ◽  
Betsy S Laumeister ◽  
Vidhu Bansal ◽  
Vandana Kataria ◽  
Preeti Loomba ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Low Molecular Weight Heparin ◽  
Low Molecular Weight ◽  
Prevention And Treatment
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