A NEW METHOD FOR THE DETERMINATION OF VARIOUS FIBRES IN MIXTURES, WITH SPECIAL REFERENCE TO THE DETERMINATION OF LANITAL IN WOOL-LANITAL MIXTURES

1938 ◽  
Vol 16b (2) ◽  
pp. 61-67 ◽  
Author(s):  
P. Larose
Keyword(s):  
Specific Gravity ◽  
Special Reference ◽  
New Method ◽  
Satisfactory Method ◽  
The Difference

The method of Da Schio (1) for the determination of lanital in lanital-wool mixtures has been tried and found to be unreliable. A new and satisfactory method has been developed. This method makes use of the difference in the specific gravities of wool and lanital to separate the fibres by means of a liquid of intermediate specific gravity. The Herzog-Skinkle method has been found to give results that are a little high. The method devised by the author is also applicable to wool-cotton and wool-staple rayon mixtures. Results of tests carried out on various mixtures and by various methods are given.

scholarly journals The rapid determination of carcass fat by the Foss-Let specific gravity technique

1976 ◽  
Vol 36 (3) ◽  
pp. 567-570 ◽  
Author(s):  
C. J. H. Woodward ◽  
P. Trayhurn ◽  
W. P. T. James
Keyword(s):  
Specific Gravity ◽  
Rapid Determination ◽  
Reference Method ◽  
New Method ◽  
Storage Lipid ◽  
Structural Lipid ◽  
Nutritional Studies

1. Carcass fat was determined by extraction with tetrachloroethylene and measurement of the solvent's change in density. The results were comparable in precision to those of a reference method; the new method extracted storage lipid but little structural lipid.2. The technique is simple, rapid and appropriate for many nutritional studies.

A New Method for Starch Gel Electrophoresis of Human Hemoglobins, with Special Reference to the Determination of Hemoglobin A2

1958 ◽  
Vol 4 (6) ◽  
pp. 484-495 ◽  
Author(s):  
C A J Goldberg
Keyword(s):  
Special Reference ◽  
Gel Electrophoresis ◽  
New Method ◽  
Resolving Power ◽  
Buffer System ◽  
Starch Gel Electrophoresis ◽  
Healthy Individuals ◽  
Starch Gel ◽  
Hemoglobin A2

Abstract A method for starch gel electrophoresis of hemoglobins is presented in which a modified Lintner starch is used for the preparation of the gel. A discontinuous buffer system of tris-EDTA-borate/barbital is used as the electrolyte medium because of its superior resolving power. Hemoglobin A2 values, obtained with this method, of healthy individuals, patients with thalassemia, and those with various anemias of nonthalassemic origin are presented.

A new micro-pyknometric method for the specific gravity of heavy solids; with a note on the accuracy of specific gravity determinations

1938 ◽  
Vol 25 (160) ◽  
pp. 30-34 ◽  
Author(s):  
F. A. Bannister ◽  
Max H. Hey
Keyword(s):  
Specific Gravity ◽  
Difficult Problem ◽  
New Method ◽  
Heavy Liquids

The determination of the specific gravity of a solid which is only available in small quantity has always been a difficult problem in cases where the suspension method fails, either because the solid is too dense, or because it dissolves in or reacts with the heavy liquids available. It is hoped that the following method will be found a useful addition to the numerous methods which have been proposed from time to time to meet such cases. References to most of these methods are given at the end of the paper. Neither the new method nor any one of the older ones is universally applicable, and the best method for any particular case will depend on many circumstances.

scholarly journals Publication announcement

1905 ◽  
Vol 76 (507) ◽  
pp. 87-87
Keyword(s):  
Carbon Dioxide ◽  
Free Surface ◽  
Special Reference ◽  
Atmospheric Carbon Dioxide ◽  
New Method ◽  
Caustic Alkali ◽  
Physiological Processes ◽  
Thermal Emissivity ◽  
In Series

Researches on some of the Physiological Processes of Green Leaves, with special Reference to the Interchange of Energy between the Leaf and its Surroundings. By HORACE T. BROWN, LL.D., F.R.S., and F. Escombe. On a New Method for the Determination of Atmospheric Carbon Dioxide. based on the Rate of its Absorption by a Free Surface of a Solution of Caustic Alkali. By HORACE T. BROWN, LL.D., F.R.S., and F. Escombe On the Variations in the Amount of Carbon Dioxide in the Air of Kew during the Years 1898-1901. By HORACE T. BROWN, LL.D., F.R.S., and F. EscOMBE. On the Thermal Emissivity of a Green Leaf in Still and Moving Air. By HORACE T. BROWN, LL.D., F.R.S., and W. E. WILSON, D.Sc., F.R.S. These papers, which formed the basis of the Bakerian Lecture, delivered by Dr. Horace T. Brown, on March 23, 1905, are published in Series B of 'Proceedings,' April, 1905.

scholarly journals A NEW METHOD FOR THE DETERMINATION OF TOXIC DYE USING FTIR SPECTROSCOPY

2010 ◽  
Vol 9 (2) ◽  
pp. 27-38 ◽  
Author(s):  
Mohammad Elwathig Saeed Mirghani ◽  
Nassereldeen A. Kabbashi ◽  
Isam Y. Qudsieh ◽  
Faiz A. Elfaki
Keyword(s):  
Ftir Spectroscopy ◽  
Partial Least Square ◽  
Least Square ◽  
New Method ◽  
Calibration Model ◽  
Chemical Methods ◽  
Toxic Dyes ◽  
Wet Chemical ◽  
The Difference

A new method was developed to determine toxic dyes content in textileand other products using Fourier Transform Infrared (FTIR) spectroscopy withAttenuated Total Reflectance (ATR) element and KBr transmission cell. Thewavelengths used were selected using pure dyes and dye mixtures. Transmittance valuesfrom the wavelengths regions 3500 – 2650 and 1675 – 1500 cm-1 and partial least square(PLS) regression method were used to derive FTIR spectroscopic calibration model fordyes containing –N=N– in their structure. The coefficient of determinations (R2) for themodels were computed by comparing the results obtained from FTIR spectroscopyagainst the actual values of the dyes concentrations. R2 were 0.9321 and 0.9819 for twosamples of toxic dyes respectively. The standard errors (SE) of calibrations were 1.84and 1.36 respectively. The calibration model was cross validated within the same set ofsamples and the standard deviation (SD) of the difference for repeatability and accuracyof the FTIR method were determined. With its speed and ease of data manipulation,FTIR spectroscopy is a useful alternative method to wet chemical methods for rapid androutine detection of azo dyes as toxic dyes in such products for quality control.

scholarly journals Comparison Study of Two Procedures for the Determination of Emamectin Benzoate in Medicated Fish Feed

2005 ◽  
Vol 88 (2) ◽  
pp. 468-471
Author(s):  
Leslie J Farer ◽  
John M Hayes
Keyword(s):  
Solid Phase ◽  
Sample Pretreatment ◽  
Previous Method ◽  
New Method ◽  
Fish Feed ◽  
Emamectin Benzoate ◽  
The Difference ◽  
Commercial Sources ◽  
Comparison Of The Results

Abstract A new method has been developed for the determination of emamectin benzoate in fish feed. The method uses a wet extraction, cleanup by solid-phase extraction, and quantitation and separation by liquid chromatography (LC). In this paper, we compare the performance of this method with that of a previously reported LC assay for the determination of emamectin benzoate in fish feed. Although similar to the previous method, the new procedure uses a different sample pretreatment, wet extraction, and quantitation method. The performance of the new method was compared with that of the previously reported method by analyses of 22 medicated feed samples from various commercial sources. A comparison of the results presented here reveals slightly lower assay values obtained with the new method. Although a paired sample t-test indicates the difference in results is significant, this difference is within the method precision of either procedure.

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