Use of biological systems for the preparation of chiral molecules. 6. Preparation of stereoisomeric 2,4-diols: synthesis and conformational study of bicyclo derivatives, isomeric components of a pheromone of Trypodendron lineatum

1989 ◽  
Vol 54 (9) ◽  
pp. 2238-2242 ◽  
Author(s):  
G. Dauphin ◽  
A. Fauve ◽  
H. Veschambre
Keyword(s):  
Biological Systems ◽  
Chiral Molecules ◽  
Conformational Study ◽  
Trypodendron Lineatum

scholarly journals Enabling molecular communication through chirality of enantiomers

2021 ◽  
Vol 2 (3) ◽  
pp. 25-32
Author(s):  
Valeria Loscr� ◽  
Anna Maria Vegni
Keyword(s):  
Information Exchange ◽  
Biological Systems ◽  
Effective Communication ◽  
Chiral Molecules ◽  
Molecular Communication ◽  
Research Activity ◽  
Deep Knowledge ◽  
Strong Emphasis ◽  
Communication Technique ◽  
Communication Paradigm

With the advancement of nanotechnology, there has been fervid research activity on new communication paradigms suitable for new challenging contexts, such as biological systems. Among different approaches, the most considered has been artificial Molecular Communication, where entities such as synthetic molecules, enzymes, hormones, bacteria etc. are functionalized in order to implement information exchange with the surrounding system and with other entities. In this context, it is interesting to analyze specific features that could be exploited for effective communication paradigms. In this paper, we focus on chiral molecules (a.k.a. enantiomers) as novel enablers for a molecular communication paradigm. Chirality is an interesting and appealing feature existing in nature and that can be replicated with strong emphasis in new types of materials, such as metasurfaces and metamaterials. A deep knowledge of chirality features and how chiral molecules interact with each other or with achiral molecules provides insights into designing a new molecular communication technique suitable for biological environments. In this contribution, we will highlight the main applications of chiral molecules and we will present chiral features as the viable way for realizing a nanocommunication system.

Use of biological systems for the preparation of chiral molecules. 3. Application in pheromone synthesis: preparation of sulcatol enantiomers

1987 ◽  
Vol 52 (2) ◽  
pp. 256-260 ◽  
Author(s):  
Andre Belan ◽  
Jean Bolte ◽  
Annie Fauve ◽  
Jean G. Gourcy ◽  
Henri Veschambre
Keyword(s):  
Biological Systems ◽  
Chiral Molecules

Transmission Electron Microscopy of Protein Macromolecules

1971 ◽  
Vol 29 ◽  
pp. 424-425
Author(s):  
Henry S. Slayter
Keyword(s):  
Biological Systems ◽  
Metal Vapor ◽  
Resolving Power ◽  
Electron Microscopic ◽  
Chemical Methods ◽  
Molecular Weights ◽  
The Past ◽  
Physical Chemical ◽  
Transmission Electron

Electron microscopic methods have been applied increasingly during the past fifteen years, to problems in structural molecular biology. Used in conjunction with physical chemical methods and/or Fourier methods of analysis, they constitute powerful tools for determining sizes, shapes and modes of aggregation of biopolymers with molecular weights greater than 50, 000. However, the application of the e.m. to the determination of very fine structure approaching the limit of instrumental resolving power in biological systems has not been productive, due to various difficulties such as the destructive effects of dehydration, damage to the specimen by the electron beam, and lack of adequate and specific contrast. One of the most satisfactory methods for contrasting individual macromolecules involves the deposition of heavy metal vapor upon the specimen. We have investigated this process, and present here what we believe to be the more important considerations for optimizing it. Results of the application of these methods to several biological systems including muscle proteins, fibrinogen, ribosomes and chromatin will be discussed.

Freeze-fracture cytochemistry: A goal set by Russell Steere in 1957

1993 ◽  
Vol 51 ◽  
pp. 60-61
Author(s):  
Nicholas J Severs
Keyword(s):  
Chemical Nature ◽  
Biological Systems ◽  
Freeze Fracture ◽  
Structural Components ◽  
Major Goal ◽  
Membrane Biology ◽  
Routine Application ◽  
The Future ◽  
Freeze Etching

In his pioneering demonstration of the potential of freeze-etching in biological systems, Russell Steere assessed the future promise and limitations of the technique with remarkable foresight. Item 2 in his list of inherent difficulties as they then stood stated “The chemical nature of the objects seen in the replica cannot be determined”. This defined a major goal for practitioners of freeze-fracture which, for more than a decade, seemed unattainable. It was not until the introduction of the label-fracture-etch technique in the early 1970s that the mould was broken, and not until the following decade that the full scope of modern freeze-fracture cytochemistry took shape. The culmination of these developments in the 1990s now equips the researcher with a set of effective techniques for routine application in cell and membrane biology.Freeze-fracture cytochemical techniques are all designed to provide information on the chemical nature of structural components revealed by freeze-fracture, but differ in how this is achieved, in precisely what type of information is obtained, and in which types of specimen can be studied.

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