Determination of Rubber in Rubber-Bearing Plants

1934 ◽  
Vol 7 (1) ◽  
pp. 111-124 ◽  
Author(s):  
D. Spence ◽  
M. L. Caldwell
Keyword(s):  
Quantitative Determination ◽  
Systematic Study ◽  
Plant Tissue ◽  
Extensive Investigation ◽  
Present Communication ◽  
Rubber Content ◽  
Essential Step ◽  
Rubber Bearing ◽  
The Subject

Abstract THE determination of the true rubber content of both raw and manufactured rubber has been the subject of extensive investigation. Search has failed to reveal any corresponding record covering studies applicable to rubber-bearing plants. The authors' investigations, covering such methods as have been published, demonstrate their inaccuracy and inadequacy for practical use. There has never been published, as far as the authors have been able to determine, any thorough, systematic study of the factors which determine the value and accuracy of any method for the quantitative determination of the pure caoutchouc contained in a given specimen of plant tissue. The work embodied in the present communication was undertaken as an essential step towards the solution of some of the complex problems in the production of rubber from the guayule shrub. Without some method for determining with completeness and accuracy in terms of pure caoutchouc the value of any given sample it would have been fruitless to proceed to studies of the metabolism of the plant. The equally important problems in the control of commercial operations, both in field and factory, hinged at the outset on the development of an accurate means to determine the rubber content of the plant.

scholarly journals Research of the Disparities in the Process of Revitalization of Brownfields in Small Towns and Cities

2021 ◽  
Vol 13 (3) ◽  
pp. 1232
Author(s):  
Natalie Szeligova ◽  
Marek Teichmann ◽  
Frantisek Kuda
Keyword(s):  
Small Towns ◽  
The Czech Republic ◽  
Essential Step ◽  
Community Strength ◽  
Population Turnover ◽  
Subsequent Application ◽  
Level Of Knowledge ◽  
The Subject ◽  
Relevant Factors

The subject of the work is the research on relevant factors influencing participation in the success of brownfield revitalization, especially in the territory of small municipalities. Research has so far dealt with the issue of determining disparities in the municipalities of the Czech Republic, not excluding small municipalities, but their subsequent application has usually been presented in larger cities. The focus on smaller municipalities or cities was usually addressed only in general. The introduction provides an overview of theoretical knowledge in the field of brownfield revitalization. Defining the level of knowledge of the monitored issues is an essential step for the purposes of more effective determination of disparities. Disparities will be determined on the basis of information on localities that have been successfully revitalized. The identified disparities are then monitored in the territory of small municipalities. For the purposes of processing, it was determined that a small municipality or city is an area with a maximum of 5000 inhabitants. Using appropriately selected statistical methods, an overview of disparities and their weights is determined, which significantly affect the success of revitalization. In small municipalities, the issue of brownfields is not emphasized but, in terms of maintaining community strength and reducing population turnover, the reuse of brownfields is a crucial theme.

A systematic study of glycopeptide esterification for the semi-quantitative determination of sialylation in antibodies

2015 ◽  
Vol 29 (19) ◽  
pp. 1817-1826 ◽  
Author(s):  
Andrey Giovanni Gomes de Oliveira ◽  
Rini Roy ◽  
Céline Raymond ◽  
Edward D. Bodnar ◽  
Venkata S. Tayi ◽  
...  
Keyword(s):  
Quantitative Determination ◽  
Systematic Study

scholarly journals The determination of the angles between covalencies, from measurements of electric dipole moment

1933 ◽  
Vol 140 (842) ◽  
pp. 562-579 ◽  
Keyword(s):  
Dipole Moment ◽  
Electric Dipole Moment ◽  
Experimental Work ◽  
Electric Dipole ◽  
Dipole Moments ◽  
Present Communication ◽  
Electric Dipole Moments ◽  
The Subject ◽  
The One

Of the methods which have been devised for the measurement of angles between covalencies, the one based on measurements of electric dipole moments is among the most valuable. Descriptions of considerable experimental work on the subject have been published by several authors, but the discussions of the basis of the method, its further possible applications, the possible errors and their probable importance, are not only scattered, but incomplete. It therefore appeared desirable that a more complete, general treatment of these matters should be given, and the present communication is an attempt to do this.

scholarly journals 1. Preliminary Notice of a Method for the Quantitative Determination of Urea in the Blood

1880 ◽  
Vol 10 ◽  
pp. 564-571
Author(s):  
John Haycraft
Keyword(s):  
Quantitative Determination ◽  
The Future ◽  
The Subject

The subject of these investigations, some of the results of which are before the Society to-night, was suggested to me by Professor Carl Ludwig, and was carried out in his laboratory at Leipzig, where I worked with the help of his assistant, Dr Drechsel, to whose kindness and large knowledge of the subject I was much indebted.In this paper I shall give simply an account of the method of analysis, leaving for the future a record of the facts which it has enabled me to obtain.

Sign in / Sign up

Export Citation Format

Share Document