A chemical study of the Irish potato.

"New series" vol. IV, no. 8.

A chemical study of the Irish potato.

"New series" vol. IV, no. 9.

The utilization of unmerchantable apples /

Caption title: What use can be made of unmerchantable apples?

A new plan for the construction of a storage celler /

"New series" vol. IV, no. 11.

Experiment garden notes.

"New series" vol. IV, no. 12.

Extension bulletin /

Title from caption.

Bulletin

New series sometimes called Bulletin, and sometimes Extension bulletin.

Experiments with cotton, 1898 /

Cover title.

Experiments with foreign cotton /

Cover title.

Microscopic study of the cotton plant /

Caption title.

Catalogue

Mode of access: Internet.

Annual report - The Texas Agricultural Experiment Station.

No reports were published for 1903-11. Cf. its Twenty-fifth annual report.

Bulletin - Texas Agricultural Experiment Station

Selected water resources abstracts

Thermoplastic starch modified during melt processing with organic acids: The effect of molar mass on thermal and mechanical properties

Thermoplastic starch (TPS) was modified with ascorbic acid and citric acid by melt processing of native starch with glycerol as plasticizer in an intensive batch mixer at 160 degrees C. It was found that the molar mass decreases with acid content and processing time causing the reduction in melting temperature (T(m)). As observed by the results of X-ray diffraction and DSC measurements, crystallinity was not changed by the reaction with organic acids. T(m) depression with falling molar mass was interpreted on the basis of the effect of concentration of end-chain units, which act as diluents. FTIR did not show any appreciable change in starch chemical compositions, leading to the conclusion that the main changes observed were produced by the variation in molar mass of the material. We demonstrated that it is possible to decrease melt viscosity without the need for more plasticizer thus avoiding side-effects such as an increase in water affinity or relevant changes in the dynamic mechanical properties. (C) 2010 Elsevier B.V. All rights reserved.

Prediction of soil shear strength in agricultural and natural environments of the Brazilian Cerrado

The objective of this work was to develop uni- and multivariate models to predict maximum soil shear strength (τmax) under different normal stresses (σn), water contents (U), and soil managements. The study was carried out in a Rhodic Haplustox under Cerrado (control area) and under no-tillage and conventional tillage systems. Undisturbed soil samples were taken in the 0.00-0.05 m layer and subjected to increasing U and σn, in shear strength tests. The uni- and multivariate models - respectively τmax=10(a+bU) and τmax=10(a+bU+cσn) - were significant in all three soil management systems evaluated and they satisfactorily explain the relationship between U, σn, and τmax. The soil under Cerrado has the highest shear strength (τ) estimated with the univariate model, regardless of the soil water content, whereas the soil under conventional tillage shows the highest values with the multivariate model, which were associated to the lowest water contents at the soil consistency limits in this management system.