Physical and basic strength of prepared nano structured MgO

2010 ◽  
Author(s):  
Abdul Rahim Yacob ◽  
Mohd Khairul Asyraf Amat Mustajab ◽  
Nur Syazeila Samadi
Keyword(s):  
Basic Strength

Effect of Calcination on the Basic Strength of Surface Modified Nano-Zinc Oxide Characterised by FTIR and Back Titration Methods

2015 ◽  
Vol 1107 ◽  
pp. 326-332
Author(s):  
Abdul Rahim Yacob ◽  
Kamaluddeen Suleiman Kabo
Keyword(s):  
Zinc Oxide ◽  
Metal Oxides ◽  
Base Catalysis ◽  
Nano Zinc Oxide ◽  
Back Titration ◽  
And Performance ◽  
Nano Zinc ◽  
Surface Modified ◽  
Heterogeneous Base ◽  
Basic Strength

The use of metal oxides in heterogeneous base catalysis has gained a large interest due to their application in many chemical and industrial processes and is environmental friendly. Basic metal oxides are commonly used and their structures, morphology and performance can be modified by method of preparation and thermal activation. In this study, surface modified amphoteric zinc oxide was prepared via hydration-dehydration method and characterised by TGA and FTIR. The basic strength at various temperatures is characterised by FTIR and back titration analyses. The results shows that surface modified zinc oxide has the highest basic strength of 1.453mmolg-1at 400°C making it a relatively good and suitable compound for use in heterogeneous basic catalysis. This result is also supported by FTIR spectra which show possible relationship between the Lewis O2-and increasing basic strength.

scholarly journals BASIC STRENGTH OF STEEL COLUMNS FROM TEST DATA

1983 ◽  
Vol 1983 (335) ◽  
pp. 59-68
Author(s):  
Yuhshi FUKUMOTO ◽  
Yoshito ITOH
Keyword(s):  
Test Data ◽  
Steel Columns ◽  
Basic Strength

scholarly journals Draining machine concept

Mechanik ◽  
2018 ◽  
Vol 91 (7) ◽  
pp. 603-605
Author(s):  
Jarosław Selech ◽  
Dawid Romek ◽  
Dariusz Ulbrich ◽  
Konrad Włodarczyk ◽  
Żaneta Staszak ◽  
...  
Keyword(s):  
Device Structure ◽  
Simple Operation ◽  
Machine Element ◽  
Basic Strength ◽  
Made In

The article contains a draft of a device for laying drainage pipelines. The project was made in a CAD environment. The article contains basic strength calculations of the device structure elements. The main assumptions that the device fulfills is the simple operation and high repairability of the machine element.

NEW NITROCHALCONES. VII

1964 ◽  
Vol 42 (11) ◽  
pp. 2417-2423 ◽  
Author(s):  
T. Szell ◽  
A. M. Eastham ◽  
Gy. Sipos
Keyword(s):  
Sodium Hydroxide ◽  
Hydrogen Chloride ◽  
Electrophilic Character ◽  
Basic Strength

A number of new nitrohydroxychalcones have been synthesized using sodium hydroxide and hydrogen chloride as catalysts. It has been found that with substituents which increase the acidity of acetophenones or the electrophilic character of benzaldehydes (e.g. NO2, halogen, CN), sodium hydroxide is the better condensing agent, while with those substituents which increase the basic strength of the carbonyl, hydrogen chloride is satisfactory.

A Strength and Anthropometric Comparison of Young Men and Women

1980 ◽  
Vol 24 (1) ◽  
pp. 31-33 ◽  
Author(s):  
W. W. Hosier ◽  
J. R. Morrow
Keyword(s):  
Body Weight ◽  
Young Men ◽  
Lean Body Weight ◽  
Anthropometric Measures ◽  
Design Data ◽  
Men And Women ◽  
Work Station ◽  
Leg Strength ◽  
The Impact ◽  
Basic Strength

The need for strength and anthropometric data for women is becoming increasingly important. The purpose of the research reported here was to explore basic strength and anthropometric differences between young women and men, and make application of these differences to work station design. Data were collected on 87 men and 115 women. The variables obtained on each subject included strength and anthropometric measures. Percent fat was calculated and used to transform the subject's body weight into lean and fat weight. The results indicated that fat weight, lean body weight, and leg strength each could significantly differentiate between men and women when other characteristics were controlled. These findings indicate that the magnitude of the differences between young men and women lies in body composition and strength, whereas the impact of anthropometric variables such as shoulder and hip diameter are not as great as one might suspect. Further research is suggested and applications to work station design offered.

THE CHEMISTRY OF ETHYLENE OXIDE: III. REACTION OF ETHYLENE OXIDE IN AMINE SOLUTION

1951 ◽  
Vol 29 (7) ◽  
pp. 585-596 ◽  
Author(s):  
A. M. Eastham ◽  
B. deB. Darwent
Keyword(s):  
Ethylene Oxide ◽  
Chemical Nature ◽  
Low Dielectric Constant ◽  
Specific Rate ◽  
Low Dielectric ◽  
Wide Range ◽  
Specific Rate Constant ◽  
Solutions Of Electrolytes ◽  
Strong Acids ◽  
Basic Strength

A kinetic study has been made of the reaction of ethylene oxide in pyridine solution in the presence of strong acids. The rate has been found to be dependent upon the concentration of acid and of oxide over a wide range of concentrations at 25°C. The specific rate constant, however, varies markedly with the nature of the acid anion and appears to decrease with increasing basic strength of the anion. The absence of large salt effects seems to indicate that the anion effect is of a physical rather than chemical nature and the results are therefore tentatively attributed to the nature of solutions of electrolytes in solvents of low dielectric constant.

Substituent effects. 8. Basic strength of azatriptycene, triphenylamine, and some related amines

1981 ◽  
Vol 46 (21) ◽  
pp. 4209-4211 ◽  
Author(s):  
A. J. Hoefnagel ◽  
M. A. Hoefnagel ◽  
B. M. Wepster
Keyword(s):  
Substituent Effects ◽  
Basic Strength
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