scholarly journals The Structure and Composition of Rat Reticulocytes

Blood ◽  
1962 ◽  
Vol 20 (5) ◽  
pp. 547-556 ◽  
Author(s):  
T. HALLINAN ◽  
E. EDEN ◽  
R. NORTH
Keyword(s):  
Endoplasmic Reticulum ◽  
Chemical Composition ◽  
Mammalian Cells ◽  
High Speed ◽  
Similar Chemical Composition ◽  
Whole Cells ◽  
Outer Membranes ◽  
Similar Chemical ◽  
Mammalian Tissues ◽  
Rat Reticulocytes

Abstract 1. Fixed, sectioned rat reticulocytes, embedded in araldite, have a regular outer limiting margin like that of erythrocytes; however, unlike erythrocytes they contain cytoplasmic organelles similar to those in erythroblasts and other mammalian cells. These include mitochondria, ribosomes and a sparse endoplasmic reticulum consisting of rounded vesicles and occasional small cisternae. The endoplasmic reticulum appears to consist wholly of "rough-surfaced" elements. 2. Many mitochondria have disorientated cristae or ruptured outer membranes. The possible origin of these alterations is discussed. 3. Ribosomes appear as electron-opaque granules 10-20 mµ in diameter in sections of whole cells. Most of them occur free in the cytoplasm while a few appear to be attached to the surface of vesicles and cisternae of the endoplasmic reticulum. They can be isolated from ruptured cells by high speed centrifugation and have a similar chemical composition to ribosomes from other mammalian tissues.

scholarly journals Comparison of properties of cutting edges made of HSS obtained by conventional methods and in powder metallurgy process

Mechanik ◽  
2017 ◽  
Vol 90 (10) ◽  
pp. 826-828
Author(s):  
Maciej Jan Kupczyk ◽  
Jędrzej Komolka
Keyword(s):  
Powder Metallurgy ◽  
Chemical Composition ◽  
Functional Properties ◽  
High Speed ◽  
High Speed Steel ◽  
Similar Chemical Composition ◽  
Powder Metallurgy Process ◽  
Similar Chemical ◽  
Conventional Methods ◽  
Metallurgy Process

Selected fragments of investigations of technological and functional properties of cutting edges made of conventional and sintered high speed steel with similar chemical composition are presented. Investigations of technological and functional properties have comparative character and concern among other things estimation of chemical composition, hardness, structure and durability during toughening steel machining.

scholarly journals Creating artificial Rhino Horns from Horse Hair

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Ruixin Mi ◽  
Z. Z. Shao ◽  
F. Vollrath
Keyword(s):  
Mechanical Properties ◽  
Chemical Composition ◽  
Composite Structures ◽  
Similar Chemical Composition ◽  
The Real ◽  
Similar Chemical ◽  
Horse Hair ◽  
Ft Ir ◽  
Tga Analysis

Abstract Demand for rhino horn is driving poaching with devastating effect for the few individuals left of the few species surviving from this once numerous, widespread and cosmopolitan clade of pachyderms. We bundled together tail hairs of the rhino’s ubiquitous near relative, the horse, to be glued together with a bespoke matrix of regenerated silk mimicking the collagenous component of the real horn. This approach allowed us to fabricate composite structures that were confusingly similar to real rhino horn in look, feel and properties. Spectral and thermal FT-IR, DSC and TGA analysis demonstrated the similar chemical composition and thermo-mechanical properties between the natural and the faux horns.

scholarly journals The Effect of Microstructural Imperfections on Corrosion Fatigue of Additively Manufactured ER70S-6 Alloy Produced by Wire Arc Deposition

Metals ◽  
2020 ◽  
Vol 10 (1) ◽  
pp. 98 ◽  
Author(s):  
Tomer Ron ◽  
Galit Katarivas Levy ◽  
Ohad Dolev ◽  
Avi Leon ◽  
Amnon Shirizly ◽  
...  
Keyword(s):  
Additive Manufacturing ◽  
Fatigue Strength ◽  
Chemical Composition ◽  
Corrosion Fatigue ◽  
Nacl Solution ◽  
Similar Chemical Composition ◽  
Corrosive Solution ◽  
Similar Chemical ◽  
Wire Arc Additive Manufacturing ◽  
Arc Deposition

This study aims at evaluating the effect of microstructure imperfections on the corrosion fatigue performance of an ER70S-6 alloy produced by wire arc additive manufacturing (WAAM) process, in a 3.5% NaCl solution. For reference, a regular ST-37 alloy with relatively similar chemical composition was considered as a counterpart alloy. This was justified by the fact that the ER70S-6 alloy is usually used for conventional welding of ST-37 steel. The results obtained indicated that while the ST-37 alloy exhibited fatigue strength of 240 MPa in the corrosive solution, the additively manufactured ER70S-6 alloy showed fatigue strength of only 140 MPa. These differences were related to microstructural imperfections that are inherently produced during the WAAM process.

Rumen degradation of straw 2. Botanical fractions of straw from two barley cultivars

1986 ◽  
Vol 43 (2) ◽  
pp. 271-278 ◽  
Author(s):  
M. Ramanzin ◽  
E. R. Ørskov ◽  
A. K. Tuah
Keyword(s):  
Chemical Composition ◽  
Dry Matter ◽  
Barley Straw ◽  
Ammonia Treatment ◽  
Similar Chemical Composition ◽  
Barley Cultivars ◽  
Rumen Degradation ◽  
Dry Matter Loss ◽  
Similar Chemical ◽  
The Difference

ABSTRACTTwo varieties of barley straw, Corgi and Gerbel, which varied in degradability when incubated in the rumen in nylon bags, were chosen for further examination of botanical fractions and to see how each fraction responded to treatment with ammonia. The straws were separated into leaves, internodes, nodes and chaff. The average proportions of these fractions were respectively 0·499, 0·380, 0·055 and 0·065 in Corgi straw and 0·404, 0·512, 0·059 and 0·025 in Gerbel straw. For both varieties the degradability of the botanical fractions were leaves > chaff > nodes > internodes.Despite a similar chemical composition, the dry-matter loss (DML) values of leaves, internodes and nodes of Corgi were higher than those of Gerbel straw.The differences between varieties were larger for internodes and nodes than for leaves. The difference in DML of the two varieties at 48-h incubation was 132 g/kg DM. Of this difference, 25 g were due to differences in distribution of the botanical fractions and 107 g to differences in DML of the fractions.Ammonia treatment significantly increased the DML of all fractions except the nodes. The overall improvement due to ammonia treatment of the different fraction was internode > chaff > leaves > nodes.

The Classification of a Glassy Rock: The Pitchstone of Wormit, Fifeshire

1929 ◽  
Vol 66 (3) ◽  
pp. 116-121
Author(s):  
S. J. Shand
Keyword(s):  
Chemical Composition ◽  
Chemical Analysis ◽  
Similar Chemical Composition ◽  
Reliable Indication ◽  
Similar Chemical ◽  
Complete Chemical Analysis

In most systems of petrography the glassy rocks are treated in a very casual way. The names which are commonly given to them, such as obsidian, pitchstone, perlite, vitrophyre, and the like, afford no reliable indication of composition; and when a rock is partly crystalline and partly glassy, the composition of the glass is often assumed, quite unwarrantably, to be the same as that of the crystals. It is only in the Norm classification that vitreous rocks fall unfailingly into the same compartments as holocrystalline ones of similar chemical composition; and before any rock can be classified by this method, it is necessary to have a complete chemical analysis of it; which is, for many workers, a serious obstacle.

scholarly journals Comparative analysis of microscopic images and XRF and EDS results of bricks from arheological sites Mediana and Naisus

2014 ◽  
Vol 12 (2) ◽  
pp. 183-194
Author(s):  
Snezana Kalamkovic ◽  
Tibor Halasi
Keyword(s):  
Comparative Analysis ◽  
Chemical Composition ◽  
Late Antiquity ◽  
Archaeological Sites ◽  
Similar Chemical Composition ◽  
Microscopic Images ◽  
Similar Chemical

This paper describes the archaeological sites Mediana and Naisus during Late Antiquity. Microscopic images of bricks, and the results and analysis of XRF bricks from these archaeological sites are shown. Based on the results, it can be concluded that a similar brick exterior, and approximately the same chemical composition. One reason is, most likely, a similar chemical composition of the soil, because the archaeological sites are geographically close to each other. Another reason could be the same way bricks were producted, and that the same fuel was used in the kilns.

scholarly journals Experimental Study on Carbonization of Magnesium Slag Cement

2020 ◽  
Vol 198 ◽  
pp. 01022
Author(s):  
Yuheng Dai ◽  
Jianxun Ma ◽  
Chen Guo ◽  
Xin Xu
Keyword(s):  
Experimental Study ◽  
Chemical Composition ◽  
Physical Properties ◽  
Industrial Waste ◽  
Slag Cement ◽  
Similar Chemical Composition ◽  
Similar Chemical ◽  
Mechanical And Physical Properties

Magnesium slag is a kind of industrial waste with the similar chemical composition to silicate cements, which is of hydration activity to some extent. However, the hydration activity of magnesium slag is much lower than that of traditional silicate cements. Through the method of carbonization, this experiment enhanced the hydration activity of magnesium slag, so that the strength of magnesium slag products can meet the requirements of structures together with certain mechanical and physical properties as well.

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