scholarly journals Ultraviolet Microscopy

2020 ◽  
Author(s):  
Keyword(s):  
Ultraviolet Microscopy

Composition and Structure of Hevea Latex

1938 ◽  
Vol 11 (2) ◽  
pp. 394-404
Author(s):  
A. R. Kemp
Keyword(s):  
Chemical Analyses ◽  
Ultraviolet Microscopy ◽  
Composition And Structure

Abstract Many properties of rubber are intimately related to the composition and structure of latex from which it is made. Some of these relations, however, remain obscure since our knowledge of latex structure and of the inner properties of rubber is lacking. The purpose of this paper is to help clear up some of the important questions relating to latex and rubber structure and to discuss their possible bearing on rubber properties. Composition of Ammonia-Preserved Latex This work and that of F. F. Lucas on ultraviolet microscopy of latex were carried out on commercial ammonia-preserved plantation latex taken from fresh shipments coming from two suppliers. The chemical analyses of these latices are given in Table I and are typical, although the composition of commercial liquid latex may vary somewhat, depending on many causes which will not be dealt with here.

Analysis of resolution and feature size in extreme ultraviolet microscopy images

2008 ◽  
Author(s):  
M.C. Marconi ◽  
P.W. Wachulak ◽  
C. Brewer ◽  
F. Brizuela ◽  
R. Bartels ◽  
...  
Keyword(s):  
Extreme Ultraviolet ◽  
Feature Size ◽  
Ultraviolet Microscopy ◽  
Microscopy Images

Demonstrating 30-nm spatial resolution of three-multilayer-mirror objective for extreme ultraviolet microscopy: Imaging test by observing lithography mask

2014 ◽  
Vol 7 (10) ◽  
pp. 102502 ◽  
Author(s):  
Mitsunori Toyoda ◽  
Kenjiro Yamasoe ◽  
Akifumi Tokimasa ◽  
Kentaro Uchida ◽  
Tetsuo Harada ◽  
...  
Keyword(s):  
Spatial Resolution ◽  
Extreme Ultraviolet ◽  
Microscopy Imaging ◽  
Multilayer Mirror ◽  
Imaging Test ◽  
Ultraviolet Microscopy

Adhesion of Phytophthora palmivora zoospores: detection and ultrastructural visualization of concanavalin A-receptor sites appearing during encystment

1975 ◽  
Vol 19 (1) ◽  
pp. 11-20
Author(s):  
V.O. Sing ◽  
S. Bartnicki-Garcia
Keyword(s):  
Electron Microscopy ◽  
Cell Surface ◽  
Concanavalin A ◽  
Solid Surfaces ◽  
Trypsin Digestion ◽  
Phytophthora Palmivora ◽  
Con A ◽  
Binding Material ◽  
Ultraviolet Microscopy ◽  
Receptor Sites

The binding of concanavalin A (Con A) to the cell surface of zoospores and cysts of Phytophthora palmivora was studied by radiometry (125I-Con A), ultraviolet microscopy (fluorescein-Con A) and electron microscopy peroxidase-diaminobenzidine technique). Zoospores were found to secrete during the early stages of encystment a Con A-binding material susceptible to trypsin digestion. This glycoprotein is contained in the so-called peripheral vesicles and is probably responsible for the adhesion of the encysting zoospores to solid surfaces.

Incompatibility in Cordia alliodora (Boraginaceae), a neotropical tree

1995 ◽  
Vol 73 (3) ◽  
pp. 445-456 ◽  
Author(s):  
D. H. Boshier
Keyword(s):  
Key Words ◽  
Floral Morphology ◽  
Floral Traits ◽  
Cordia Alliodora ◽  
Evolution And Development ◽  
Neotropical Tree ◽  
Ultraviolet Microscopy ◽  
Incompatibility System ◽  
Controlled Crosses

Incompatibility and variation in floral morphology in Cordia alliodora (R. & P.) Oken (Boraginaceae) were investigated using a combination of fieldwork and light and ultraviolet microscopy. Results from controlled crosses clearly showed the presence of two groups of trees, where intergroup crosses were compatible but intragroup crosses were incompatible. A sporophytic, diallelic, one-locus incompatibility system was inferred. Limited failure of the incompatibility mechanism was found (approximately 1% of crosses) for both selfs and intragroup crosses. Whereas most authors previously described C. alliodora as a homostyle, measurement of floral traits and study of their relationship to controlled crosses revealed a poorly defined variation in stigma size strongly associated with the incompatibility groups. The relatively undeveloped heteromorphy, coupled with a strong incompatibility mechanism, is of particular interest. The genus Cordia, in particular the Cerdanae, appears to offer fruitful ground for further investigation into aspects of the evolution and development of heterostyly. Key words: incompatibility, heterostyly, Cordia alliodora.

Sign in / Sign up

Export Citation Format

Share Document