Physico-Chemical Properties of Nucleic Acids. Volume 3: Intra- and Intermolecular Interactions, Radiation Effects in DNA Cells, and Repair Mechanisms.J. Duchesne

1975 ◽  
Vol 50 (3) ◽  
pp. 308-309
Author(s):  
Lawrence Grossman
Keyword(s):  
Nucleic Acids ◽  
Intermolecular Interactions ◽  
Radiation Effects ◽  
Chemical Properties ◽  
Physico Chemical

scholarly journals Analysis of radiation effects on chicken eggs and meat irradiated by nanosecond electron beams

2020 ◽  
Vol 176 ◽  
pp. 03016
Author(s):  
Ruslan Vazirov ◽  
Sergey Sokovnint ◽  
Alisa Romanova ◽  
Ksenia Moiseeva
Keyword(s):  
Electron Beam ◽  
Shelf Life ◽  
Radiation Effects ◽  
Chemical Properties ◽  
Food Products ◽  
Modern Method ◽  
Radiation Processing ◽  
Radiation Technology ◽  
Physico Chemical ◽  
Chicken Eggs

Chicken and eggs are considered the most common product in the world. Microorganisms on the surface and inside these food products reduce the shelf life and may be the causative agents of the disease among consumers. To solve this problem various methods of thermal and chemical treatment are used, which have several disadvantages. Radiation processing is a modern method of suppressing contamination of bacteria and increasing the shelf life of food products. Unfortunately, this technology has a negative effect on the physico-chemical and organoleptic properties of the product. Therefore, for food and hatching eggs the dose level is limited about 3 kGy. However to solve this problem it is possible to use a low-energy electron beam. This approach allows irradiating with a disinfecting dose only the surface and a shallow depth of products. Experiments on the irradiation of chicken meat and eggs were carried out at the accelerators URT-0.5 and URT-1. Studying the effect of irradiation with a nanosecond electron beam (NEB) on edible chicken eggs showed no significant changes in the eggs structure and physico-chemical properties. This is primarily due to the low depth of electron penetration. Therefore, most of the product is not irradiated by electrons. Thus, irradiation using the URT accelerators will reduce the main problem of the food radiation technology.

scholarly journals Physico-Chemical Properties of Nucleic Acids

Nature ◽  
1950 ◽  
Vol 166 (4213) ◽  
pp. 170-172
Author(s):  
D. O. JORDAN
Keyword(s):  
Nucleic Acids ◽  
Chemical Properties ◽  
Physico Chemical

Deviation of polarity from linearity in liquid mixtures containing an ionic liquid

2015 ◽  
Vol 17 (47) ◽  
pp. 31613-31617 ◽  
Author(s):  
Vijay Beniwal ◽  
Shashi K. Shukla ◽  
Anil Kumar
Keyword(s):  
Ionic Liquid ◽  
Intermolecular Interactions ◽  
Chemical Properties ◽  
Liquid Mixtures ◽  
Physico Chemical ◽  
Different Types ◽  
Linear Behaviour

The physico-chemical properties of liquid mixtures, in general, exhibit deviations from linear behaviour with respect to their composition, arising out of different types of cross-intermolecular interactions (both specific and non-specific).

Understanding positive and negative deviations in polarity of ionic liquid mixtures by pseudo-solvent approach

2016 ◽  
Vol 18 (34) ◽  
pp. 23853-23863 ◽  
Author(s):  
Vijay Beniwal ◽  
Anil Kumar
Keyword(s):  
Ionic Liquid ◽  
Large Deviations ◽  
Intermolecular Interactions ◽  
Chemical Properties ◽  
Liquid Mixtures ◽  
Physico Chemical ◽  
Linear Behaviour

Physico-chemical properties of liquid mixtures in general display large deviations from linear behaviour, arising out of complex specific and non-specific intermolecular interactions.

Nucleic Acids and Their Complexes

1999 ◽  
Author(s):  
A.-C. Dock-Bregeon ◽  
D. Moras
Keyword(s):  
Nucleic Acid ◽  
Nucleic Acids ◽  
Chemical Properties ◽  
Preparation Methods ◽  
Synthetic Dna ◽  
Dna And Rna ◽  
Physico Chemical ◽  
Structure Determinations ◽  
Rna Crystallography ◽  
Rna Domains

At first glance crystallizing nucleic acids poses the same problems as crystallizing proteins since most of the variables to investigate are alike. It is thus astonishing that crystallization data banks (1) that describe so many successful protein crystallizations are so poor in information on nucleic acids. This relies on the physico-chemical and biochemical characteristics of nucleic acids distinguishing them from proteins. The aim of this chapter is to underline features explaining the difficulties often encountered in nucleic acid crystallization and to discuss strategies that could help to crystallize them more readily, either as free molecules or as complexes with proteins. Other general principles, in particular for RNA crystallization, are discussed in ref. 2. Among natural nucleic acids only the smaller ones provide good candidates for successful crystallizations. Large DNAs or RNAs can a priori be excluded because of their flexibility that generates conformational heterogeneity not compatible with crystallization. Thus the smaller RNAs with more compact structures (with 75-120 nt), especially transfer RNAs (tRNAs), but also 5S RNA, were the first natural nucleic acids to be crystallized (3, 4). At present attempts are being made with other RNA systems, such as ribozymes and introns, fragments of mRNA, viroids, viral and other tRNA-like RNAs, SELEX-evolved RNAs, and crystallization successes leading to X-ray structure determinations were reported for RNA domains of up to 160 nt long, with the resolution of the P4-P6 domain of the self-splicing Tetrahymena intron (5). The recent excitement in nucleic acid crystallography, and particularly in RNA crystallography, have partly been due to technological improvements in the preparation methods of the molecules. Advances in oligonucleotide chemical synthesis provide opportunity for making large amounts of pure desoxyribo- and more recently of ribo-oligomers of any desired sequence. This led to the crystallization of a number of DNA and RNA fragments and was followed by the co-crystallization of complexes between proteins and such synthetic fragments. Transcription methods of RNAs from synthetic DNA templates were also essential for rejuvenating the structural biology of RNAs. In the case of complexes of proteins with RNAs, the main difficulty was to purify large quantities of homogeneous biological material with well defined physico-chemical properties.

The physico-chemical properties and behaviour of the nucleic acids

1950 ◽  
Vol 46 ◽  
pp. 790 ◽  
Author(s):  
V. Desreux ◽  
R. Signer ◽  
H. Schwander ◽  
A. G. Ogston ◽  
S. Furberg ◽  
...  
Keyword(s):  
Nucleic Acids ◽  
Chemical Properties ◽  
Physico Chemical
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