THE ANALYTICAL PROBLEM OF MAPLE SAP PRODUCTS

1941 ◽  
Vol 19b (3) ◽  
pp. 68-72
Author(s):  
Paul Riou ◽  
Joachim Delorme

A systematic study of official methods of analysis of maple sap products has been made in order to investigate their validity as criteria of the purity of these products.A new value, the manganese number, is being proposed as a safer criterion but, in some cases, even this may lead to error.The conclusion of the writers is that, at the present time, it cannot be stated with certainty that a maple product is 100% pure; it is therefore necessary that research work be continued in order to find a criterion of purity that would be valid in every case.

Author(s):  
Sunny Pannu ◽  
Meenakshi Ahirwar ◽  
Rishi Jamdigni ◽  
B. K. Behera

The woven fabrics containing cotton/spandex core spun yarns possesses very vital properties of stretch, recovery and thus shape retention from the view point of wearing comfort and garment appearance. Spandex present in the core of core spun yarn is the most essential performer behind these properties. An attempt is made in this research work to study the influence of changing spandex denier in core spun yarn on the stretch and functional properties of stretch woven fabrics. The sole objective of this study is to find out whether different stretch, shrinkage and physical properties of stretch woven fabrics depend upon changing spandex percentage achieved by means of change in spandex filament denier. It was observed that by increasing denier of spandex in core spun weft yarns the increase in weft shrinkage diminishes. Dual core weft with spandex provides good elongation percentage and recovery percentage. The fabric with higher denier spandex in yarn shows a decreasing total hand values trend for summer and winter. The results depicts that the fabrics have higher THV for winter suiting fabrics as compared to summer suiting thus are more suitable for the winter wear.


2019 ◽  
Vol 1 (16) ◽  
pp. 105-111
Author(s):  
H.M Shalatska

The article considers the peculiarities of the organization of students’ research work in a technical university in foreign language classes with a gradual transition from simple forms of research to more complex ones, which is aimed at the harmonious development and improvement future specialists’ skills and abilities. The purpose of this article is to identify the main problems of the organization of students’ research work in a foreign language and consider ways of improving this process. Special attention is paid to the tasks, functions, components and various forms of students' research work. The researcher describes the possibility of using assignments for research work and organizing their performing by students in a foreign language class, in particular, such tasks as writing a summary of the text proposed by the teacher, corresponding to the student’s specialization, drawing up a plan for it, drawing up terminological dictionaries, preparing reports on a given topic, writing creative works, essays, drawing up tables and diagrams, solving problematic issues related to the future profession of a student, writing abstracts,  preparing the presentation of study' results. The involvement students in the work of scientific conferences, seminars, competitions, contests, and meetings with leading foreign experts are encouraged. The defense of master's and diploma projects in a foreign language prepares the student for the exercise of profession and integration into a foreign language environment. The examples of the most common mistakes made in the preparation of research works, which indicate the lack of students’ research skills formation are given, and ways to overcome them are recommended. The conclusions are related and future works are suggested. Thus, it also possible to create an education plans of student’ research work in foreign language and recommendations for the specific academic curriculum.


2000 ◽  
Author(s):  
M. Sakami ◽  
K. Mitra ◽  
P.-F. Hsu

Abstract This research work deals with the analysis of transient radiative transfer in one-dimensional scattering medium. The time-dependant discrete ordinates method was used with an upwind monotonic scheme: the piecewise parabolic scheme. This scheme was chosen over a total variation diminishing version of the Lax-Wendroff scheme. These schemes were originally developed to solve Eulerian advection problem in hydrodynamics. The capability of these schemes to handle sharp discontinuity in a propagating electromagnetic wave front was compared. The accuracy and the efficiency of the discrete ordinates method associated with the piecewise parabolic advection scheme were studied. Comparisons with Monte Carlo and integral formulation methods show the accuracy and the efficiency of this proposed method. Parametric study for optically thin and thick medium, different albedos and phase functions is then made in the unsteady state zone.


1965 ◽  
Vol 48 (4) ◽  
pp. 701-702
Author(s):  
Radmilo Ristich

Abstract A review of Official Methods of Analysis revealed no revision necessary for the preparation and standardization of potassium dichromate solutions. Recommendations are made for the standardization of potassium permanganate solutions for three methods of analysis.


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