ALBERT — All Library Books, journals and Electronic Records Telegrafenberg

Treffer pro Seite

Treffer 1 - 2 | 2 Treffer

Sortierung

Digitale Medien

Structure of the cell surface of the yeast Candida tropicalis and its relation to hydrocarbon transport (1984)

Käppeli, Othmar ; Walther, Paul ; Mueller, Martin ; [weitere]

Springer

Archives of microbiology 138 (1984), S. 279-282

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 1432-072X

Schlagwort(e): Candida tropicalis ; Cell surface ; Hydrocarbon transport ; Scanning electron microscopy ; Transmission electron microscopy

Quelle: Springer Online Journal Archives 1860-2000

Thema: Biologie

Notizen: Abstract The surface structure of the hypdrocarbon-utilizing yeast Candida tropicalis was investigated by scanning and transmission electron microscopy (SEM and TEM respectively). The sample preparation technique was based on a rapid cryofixation without any addition of cryoprotectants. In subsequently freeze-dried samples the surface structure was analysed by scanning electron microscopy. Thin sections were prepared from freeze substituted samples. Both techniques revealed hair-like structures at the surface of hydrocarbon-grown cells. The hairy surface structure of the cells was less expressed in glucose-grown cells and it was absent completely after proteolytic digestion of the cells. When cells were incubated with hexadecane prior to cyryofixation a contrast-rich region occured in the hair fringe of thin sections as revealed by TEM. Since these structures were characteristic for hexadecane-grown cells and could not be detected in glucose-grown or proteasetreated cells it was concluded that they originate from hexadecane adhering to the cell surface and are functionally related to hexadecane transport. The structure of the surface and its relation to hydrocarbon transport are discussed in view of earlier results on the chemical composition of the surface layer of the cell wall.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00410890

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

Digitale Medien

Polymer nanocomposites with “ultralow” refractive index (1993)

Zimmermann, Lorenz ; Weibel, Martin ; Caseri, Walter ; [weitere]

New York, NY : Wiley-Blackwell

Polymers for Advanced Technologies 4 (1993), S. 1-7

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 1042-7147

Schlagwort(e): Gelatine ; Gold ; Refractive index ; Nanocomposite ; Spin coating ; Chemistry ; Polymer and Materials Science

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie , Maschinenbau

Notizen: Nanocomposites of gelatine and gold were prepared by reduction of AuCl4H in a gelatine solution, followed by a spin coating process and a brief washing. The thickness of the films thus obtained was typically 200-400 nm. The surface of the nanocomposites was investigated by scanning electron microscopy (SEM) and surface profilometry. The size of the gold particles is in the range of ca. 2-10 nm, as elucidated by transmission electron microscopy (TEM). Refractive indices were measured by ellipsometry at wavelengths of 632.8 and 1300 nm. The refractive index depends linearly on the volume fraction of gold, at least at 1300 nm. The lowest refractive indices measured are 1.008±0.060 at 1300 nm and 0.963±0.062 at 632.8 nm (limits are 95% confidence interval). These values are, to our best knowledge, the lowest reported for a polymer or polymer composite.

Zusätzliches Material: 7 Ill.