OSPF Topology-Transparent Zone

2017 ◽  
Author(s):  
H. Chen ◽  
R. Li ◽  
A. Retana ◽  
Y. Yang ◽  
Z. Liu
Keyword(s):  
Transparent Zone

A White Band and a Transparent Zone Observed at an Interface Between a Polymerizing Polyfunctional Monomer and a Poly(Methyl Methacrylate) Rod, I

1979 ◽  
Vol 58 (1) ◽  
pp. 497-505 ◽  
Author(s):  
Sakari Hikage ◽  
Takuo Tanaka ◽  
Mitsuru Atsuta ◽  
Yoichi Uchiyama ◽  
Nobuo Nakabayashi ◽  
...  
Keyword(s):  
Methyl Methacrylate ◽  
Poly Methyl Methacrylate ◽  
White Band ◽  
Polyfunctional Monomer ◽  
Transparent Zone

The fine structure of conidial development in the genus Torula. IV. T. thermophila Cooney & Emerson

1976 ◽  
Vol 22 (8) ◽  
pp. 1102-1112 ◽  
Author(s):  
D. H. Ellis ◽  
D. A. Griffiths
Keyword(s):  
Fine Structure ◽  
Cell Walls ◽  
Secondary Wall ◽  
Wall Layer ◽  
Outer Electron ◽  
Humicola Insolens ◽  
Spore Release ◽  
Transparent Zone ◽  
Conidial Development ◽  
Dense Zone

Torula thermophila produced typical chlamydospores either as intercalary chains within prostrate hyphae or as terminal swellings on short, lateral, hyphal branches. Mature chlamydospores were spherical, dark brown, smooth-surfaced structures with thick, single-layered cell walls (= secondary wall layer) usually differentiated into an outer electron-dense zone and an inner electron-transparent zone. Disarticulation and spore release occurred after the disintegration of the original hyphal wall.The thallospores of T. thermophila arise in a manner different from the blastospores produced by other species of Torula and are structurally more closely related to the spores produced by Humicola insolens. However until further work has been completed on spore development in the Torulu-Humicola complex of fungi the name T. thermophila is retained.

Electron-transparent Zone of Mycobacteria may be a Defence Mechanism

Nature ◽  
1970 ◽  
Vol 228 (5274) ◽  
pp. 860-861 ◽  
Author(s):  
P. DRAPER ◽  
R. J. W. REES
Keyword(s):  
Defence Mechanism ◽  
Transparent Zone

Fine structure of ascospore development in the yeast Saccharomyces cerevisiae

1971 ◽  
Vol 17 (4) ◽  
pp. 507-510 ◽  
Author(s):  
Peter B. Moens
Keyword(s):  
Saccharomyces Cerevisiae ◽  
Central Zone ◽  
Nuclear Material ◽  
Yeast Cells ◽  
Mature Cell ◽  
Yeast Saccharomyces Cerevisiae ◽  
Full Size ◽  
Ascospore Development ◽  
Transparent Zone ◽  
Cytoplasmic Side

In the yeast Saccharomyces cerevisiae, ascospore development is initiated through the movement of nuclear material and cytoplasm into an envelope, or prospore wall. The prospore wall is first observed at the cytoplasmic side of the spindle plaque during the second meiotic division. When the 'prospores' attain their full size, the envelope closes and the ascospore becomes spherical. At this stage the central, electron-transparent, zone of the prospore wall becomes more prominent. Eventually the central zone expands into the mature cell wall. This description is based on observations of glutaraldehyde-fixed cells, and it differs in some details from reports based on KMnO4-fixed yeast cells.

scholarly journals Salmonella organism transmission in hatching broiler egggs

2021 ◽  
Vol 41 (1) ◽  
pp. 230-234
Author(s):  
R. A. Olorunsola ◽  
D. Eruvbetine ◽  
O. M. Idowu ◽  
O. Oyekunle ◽  
I. M. Ogunade
Keyword(s):  
Vertical Transmission ◽  
Biochemical Characterization ◽  
Nutrient Agar ◽  
Confirmatory Test ◽  
Buffer Peptone Water ◽  
Salmonella Gallinarum ◽  
Peptone Water ◽  
Salmonella Pullorum ◽  
Transparent Zone ◽  
Hatching Eggs

The vertical transmission of Salmonella organism in hatching broiler eggs were investigated in selected states in South-Western Nigeria. Hatching eggs were obtained from fifteen major hatcheries. five (hatchery A, B, C, D and E from each State [Lagos (LA), Oyo (OY) and Ogun (OG)]. A total of 300 hatchable eggs of 20 eggs from each hatchery were collected. Individual egg was broken and separated into Shell, albumin and yolk. The samples were incubated into buffer peptone water and incubated at 37°C for 24 hours. Typical colonies of salmonella grown on Xylose lysine deoxycholate agar were seen as lining black center and lightly transparent zone of reddish colour which were further cultured on nutrient agar plates for confirmatory test. The biochemical characterization was carried out using rapid kit for the identification of members of Enterobacteria family. The study revealed that Salmonella pullorum was isolated from the albumin in hatchery (OG-A) and hatchery (LA-A), Salmonella arizorae was also isolated in the Yolk from the hatchery (OG-C), Salmonella gallinarum was found in the albumin in Ogun hatchery (OG-A), however, Salmonella paratyphi A was isolated in the albumin in Oyo hatchery B (OY-B). It is evident from the study that salmonella organism reside in various fractions of the egg like albumin, shell and yolk.

scholarly journals THERMAL BEHAVIOR OF AIR-FILLED DOUBLE GLAZING

2020 ◽  
Vol 2 (4) ◽  
pp. 43-59
Author(s):  
António Manuel Vilela Pereira Gomes
Keyword(s):  
Polymeric Materials ◽  
Temperature Differential ◽  
Thermal Discomfort ◽  
Air Conditioners ◽  
Architectural Element ◽  
Early Appearance ◽  
Transparent Zone ◽  
Materials Used ◽  
The One ◽  
Window Design

The window is an opening in the wall that allows air and light into the room. This architectural element also serves to beautify, and for the user to enjoy beautiful landscapes, which exist in the vicinity of the building. But, the window is made up of elements that do not always provide the best thermal performance, thus leading to excessive electricity expenses, with the use of air conditioners. Although there are polymeric materials used in window design with regard to the transparent zone, glass is the one that is most evident from its recurring use in most buildings. Therefore, in this study, the variation and temperature differential along the glasses will be evaluated. This element, when badly chosen, can cause high solar gains, causing thermal discomfort and the early appearance of pathologies in the building.

scholarly journals Production and Partial Characterization of Cellulase from Pseudomonas Isolates Obtained from Cow Dung and Municipal Solid Wastes

2016 ◽  
Vol 30 (1-2) ◽  
pp. 11-16
Author(s):  
Md Mehadi Hasan Sohag ◽  
Md Mahbub Hasan ◽  
Jahed Ahmed ◽  
Syed Nur Ahmed Daud ◽  
Md Khurshid Alam ◽  
...  
Keyword(s):  
Cellulase Activity ◽  
Basal Medium ◽  
Cellulase Production ◽  
Solid Wastes ◽  
Cow Dung ◽  
Optimum Level ◽  
Bacterial Isolates ◽  
Municipal Solid Wastes ◽  
Enrichment Technique ◽  
Transparent Zone

Cellulase producing bacteria were isolated from cow dung and municipal solid wastes using enrichment technique. Cellulase activity was determined on carboxymethyl cellulose (CMC) agar medium supplemented with 1% CMC. Production of clear zones by the bacterial isolates on CMC agar was considered as indicative of extracellular cellulase activity. The greater size of transparent zone diameter was found proportional to the higher amount of cellulase production. Two bacterial isolates producing significant clear zone were identified as Pseudomonas spp based on morphological, cultural and biochemical characteristics. Fermentation was carried out under shake flask conditions for production of cellulase from Pseudomonas isolates in a basal medium containing CMC, KH2PO4, K2HPO4, MgSO4, NH4SO4, CaCl2 and FeSO4 at pH 7.0. The assay of cellulase viz. endoglucanase and exoglucanase in terms of CMCase and FPase, respectively was done by measuring the release of the reducing sugar. Some parameters influencing the production of cellulase by these bacterial isolates were investigated. Optimum level of cellulase was produced after 48 h of fermentation at 37°C with 5% inoculums size under continuous agitation at 120 rpm in the growth medium of pH 7.0. Optimum temperature and pH for the activity of cellulase from these bacterial isolates was 40°C and 7.0, respectively. Cellulase from these isolates was found almost stable at 25-40°C and pH 6.0-8.0 for 1 h. Furthermore, the cellulase activity was stimulated by Ca2+ and K+ but inhibited by Hg2+ and Zn2+, whereas, Mg2+ showed very low effect. Results reported herein indicated that the Pseudomonas isolates can be used as producer of extracellular cellulase.Bangladesh J Microbiol, Volume 30, Number 1-2,June-Dec 2013, pp 11-16

EVIDENCE FOR THE LYSOSOMAL NATURE OF THE PAS-POSITIVE GRANULES IN THE PURKINJE CELL OF THE CEREBELLAR CORTEX IN THE ADULT CAT

1964 ◽  
Vol 42 (1) ◽  
pp. 103-112 ◽  
Author(s):  
L. A. Chouinard
Keyword(s):  
Electron Microscope ◽  
Acid Phosphatase ◽  
Purkinje Cell ◽  
Cerebellar Cortex ◽  
Enzymatic Activities ◽  
Frozen Sections ◽  
Acid Hydrolases ◽  
Transparent Zone ◽  
Adult Cat ◽  
Dendritic Branches

In the adult cat, the Purkinje cell of the cerebellar cortex contains PAS-positive granules distributed more or less at random within the pericaryone and the primary dendritic branches. In the present study, evidence has been obtained indicating that such granules exhibit enzymatic activities characteristic of the cytoplasmic organelles known as lysosomes. Frozen sections of the cerebellar cortex, fixed in chilled formol–calcium and stained according to histochemical procedures for the detection of acid hydrolases, indeed reveal that the granules in question possess high levels of acid phosphatase, ribonuclease, deoxyribonuclease, and arylsulphatase activities. Further support for our conclusion comes from electron microscope observations of osmium-fixed material which show that the PAS-positive granules are solid organelles possessing ultrastructural features characteristic of the lysosomes in general. These features include a single, usually complete, limiting membrane; a 70 to 100 Å wide electron-transparent zone separating the limiting membrane from the organelle matrix proper; a matrix consisting of a fine, rather homogeneous, grainy material of moderate electron opacity which often contains ill-defined masses or clumps made up of a more electron-dispersing substance.

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