Fandom

VroniPlag Wiki

Ry/026

< Ry

31.366Seiten in
diesem Wiki
Seite hinzufügen
Diskussion0 Teilen

Störung durch Adblocker erkannt!


Wikia ist eine gebührenfreie Seite, die sich durch Werbung finanziert. Benutzer, die Adblocker einsetzen, haben eine modifizierte Ansicht der Seite.

Wikia ist nicht verfügbar, wenn du weitere Modifikationen in dem Adblocker-Programm gemacht hast. Wenn du sie entfernst, dann wird die Seite ohne Probleme geladen.

Permeation of Organometallic Compounds through Phospholipid Membranes

von Dr. Raycho Yonchev

vorherige Seite | zur Übersichtsseite | folgende Seite
Statistik und Sichtungsnachweis dieser Seite findet sich am Artikelende
[1.] Ry/Fragment 026 01 - Diskussion
Zuletzt bearbeitet: 2016-01-28 17:02:15 Klgn
Anézo 2003, Fragment, Gesichtet, KomplettPlagiat, Ry, SMWFragment, Schutzlevel sysop

Typus
KomplettPlagiat
Bearbeiter
SleepyHollow02
Gesichtet
Yes.png
Untersuchte Arbeit:
Seite: 26, Zeilen: 1 ff. (entire page)
Quelle: Anézo 2003
Seite(n): 39 f., Zeilen: 39: 24 ff.; 40: 1 ff.
Since fluorescence depolarization is sensitive to molecular motion, information concerning the environment in which the probe resides can be collected. Fluidity represents then the ability of a foreign molecule to move in the membrane and to experience internal conformational flexibility. However, such measurements are sensitive to both the rate of motion and any constraints to that motion, so that information about dynamics and molecular order gets intermixed [9]. Fluidity can be also quantified by the rotational correlation time spin probes, by the order parameter, also derived from spin or fluorescent probes, or by the partition coefficient describing the distribution of certain probes between the membrane and the aqueous medium. Membrane fluidity cannot be characterized by a single parameter – multiple parameters are needed to describe the physical state of the bilayers.

The fluidity of biomembranes is essential to many biological functions. Biomembranes apparently adjust their lipid composition in such a way that they remain in a fluid state irrespective of the ambient temperature or other external conditions. The rate of lateral diffusion of membrane components play e [sic] pertinent role, for instance, in enzyme reactions involving multiple membrane-bound components – some enzymatic functions require the membrane-bound components to be freely diffusing within the plane of the bilayers, whereas other processes clearly rely on constraints imposed on the mobility of membrane components. The rate with which lipids adjacent to proteins exchange with bulk lipid, is also essential to protein properties and functions. The most dramatic evidence that membrane fluidity is critical to physiological functions comes probably from studies showing adaption of various organisms to environmental stress [21]. This is most often observed in microorganisms, plants or hibernating animals, which are able to sustain low temperatures. In response to thermal stress, they alter their membrane lipid composition, usually by increasing the degree of lipid unsaturation or by decreasing the average lipid chain length, to maintain optimal membrane fluidity.


9. Gennis, R. B. Biomembranes: Molecular Structure and Function; Springer-Verlag: Berlin, 1989.

21. Schinitzky, M. Physiol. Memb. Fluidity 1984.

Since fluorescence depolarization is sensitive to molecular motion, information concerning the environment in which the probe resides can be collected. Fluidity represents then the ability of a foreign molecule to move in the membrane and to experience internal conformational flexibility. However, such measurements are sensitive to both the rate of motion and any constraints to that motion, so that information about dynamics and molecular order gets intermixed [19]. Fluidity can be also quantified by the rotational correlation time of spin probes, by the order parameter, also derived from spin or fluorescent probes, or by the partition coefficient describing the distribution of certain probes between the membrane and the aqueous medium. Membrane

[page 40:]

fluidity cannot be characterized by a single parameter: multiple parameters are needed to describe the physical state of the bilayer.

The fluidity of biomembranes is essential to many biological functions. Biomembranes apparently adjust their lipid composition in such a way that they remain in a fluid state irrespective of the ambient temperature or other external conditions. The rate of lateral diffusion of membrane components plays a pertinent role, for instance, in enzyme reactions involving multiple membrane-bound components: some enzymatic functions require the membrane-bound components to be freely diffusing within the plane of the bilayer, whereas other processes clearly rely on constraints imposed on the mobility of membrane components. The rate with which lipids adjacent to proteins exchange with bulk lipid is also essential to protein properties and functions. The most dramatic evidence that membrane fluidity is critical to physiological functions comes probably from studies showing adaption of various organisms to environmental stress [30]. This is most often observed in microorganisms, plants, or hibernating animals, which are able to sustain low temperatures. In response to thermal stress, they alter their membrane lipid composition, usually by increasing the degree of lipid unsaturation or by decreasing the average lipid chain length, to maintain optimal membrane fluidity.


[19] R. B. Gennis. Biomembranes: Molecular Structure and Function. Springer-Verlag, C. R. Cantor (Ed.), Berlin, 1989.

[30] M. Schinitzky. Physiology of Membrane Fluidity. CRC Press, Boca Raton, 1984.

Anmerkungen

The source is not given.

Sichter
(SleepyHollow02), Klgn


vorherige Seite | zur Übersichtsseite | folgende Seite
Letzte Bearbeitung dieser Seite: durch Benutzer:Klgn, Zeitstempel: 20160128170255

Auch bei Fandom

Zufälliges Wiki