Some techniques in corneal grafting

Some of the special procedures adopted in both lamellar and full-thickness keratoplasty are described, and several cases presenting unusual features and requiring an unusual approach are discussed

Corneal auto-transplant: A report of 3 cases

No Abstract

Experimental biology group: Summaries of Scientific papers

No Abstract

Grass hay as a maintenance ration for sheep during winter

Constant live-weight has been used as criterion in measuring the maintenance requirement of adult sheep during winter. It has been found that an animal weighing 100 lb. requires 2.106 lb. of a grass hay, containing 1622 Calories of metabolizable energy, to maintain its weight at an approximately constant level.The articles have been scanned in colour with a HP Scanjet 5590; 300dpi. Adobe Acrobat XI Pro was used to OCR the text and also for the merging and conversion to the final presentation PDF-format

The influence of frequency of cutting on the yield, chemical composition, digestibility and nutritive value of some grass species

Five species of indigenous grasses, namely Cloris gayana, Setaria Lindenbergiana, Cencrus Ciliaris, Digitaria Pentzii Pretoria small, and Panicum Maximum, were established each in five replications on 25 plots, each measuring (24 x 17) square feet, in a Latin Square arrangement. Each plot was again subdivided into five equal portions and a different treatment allocated at random to each subplot within a main plot. The effective cutting area of a subplot measured (22 x 3) square feet. The experiment covered two growing seasons and various treatments were applied. The objects of the investigation were to study the effect of the treatments on the yield, chemical composition, digestibility and the nutritive value of the grasses under natural conditions of soil and climate. To test the digestibility the produce obtained under any one cutting treatment for all the species was combined as a single sample. Three adult Merino wethers were employed and the hay samples were tested in nine successive periods. Since the results obtained with the grass species studied on the particular type of soil and under the climatic conditions obtaining during the two seasons of the investigation may not be taken to apply generally, it is not possible to lay down clear directions for the practical man. Nevertheless from a consideration of the evidence of the data obtained in this experiment as a whole it seems to be a warrantable conclusion that a system of cutting grasses at approximately 2-monthly intervals during the growing season for the purpose of providing feed during times of scarcity will result in the most economical utilisation of indigenous grass species under natural conditions.The articles have been scanned in colour with a HP Scanjet 5590; 300dpi. Adobe Acrobat XI Pro was used to OCR the text and also for the merging and conversion to the final presentation PDF-format.Includes bibliographical referencesab201

The relative digestibility of the constituents of the carbohydrate complex of grasses at successive stages of growth with reference to their partition into crude fiber and nitrogen-free extract according to the standard method for feeding stuff analysis

The structural constituents, natural cellulose, hemicelluloses and lignin, in graminaceous food materials, faeces, and the crude fibre isolated from these have been determined. The results showed that: (1) crude fibre is almost wholly composed of natural cellulose but that the method for its isolation underestimates the natural cellulose content of the feed and of the faeces; (2) natural cellulose is the most digestible portion and lignin the least digestible portion of the cell-wall structure. From this finding it is inferred that a closer association exists between the lignin and the hemicelluloses than between the former and the natural cellulose of the cell-wall complex; (3) with regard to roughages the standard feeding stuffs analysis does not divide the carbohydrate complex into substances of relatively low and substances of relatively high digestibility.The articles have been scanned in colour with a HP Scanjet 5590; 300dpi. Adobe Acrobat XI Pro was used to OCR the text and also for the merging and conversion to the final presentation PDF-format

The colorimetric determination of sodium in vegetation

(1) A revision of the method by Malan and Van der Lingen for the colorimetric determination of sodium in vegetation is described in detail. (2) Evidence is presented to show that:- (a) .04-0.1 mgm. Na can be determined with reasonable accuracy in the presence of 0.1 mgm. P; when 0.1- 0.2 mgm. Na is to be determined 0.2 mgm. P, and when 0.2-0.8 mgm . Na, up to 0.4 mgm. P may be present. (b) The interference of K is dependent upon absolute concentration and temperature; working at ordinary laboratory temperature ( ± 25° C.) not more than 0.8 mgm. K should be present in the aliquot for a determination. (c) At 26° C. precipitation is complete within experimental error in 30 minutes.The articles have been scanned in colour with a HP Scanjet 5590; 600dpi. Adobe Acrobat XI Pro was used to OCR the text and also for the merging and conversion to the final presentation PDF-format.mn201

A routine method for the determination of soluble ash in plant material

A routine method for the determination of soluble ash in plant material is described in detail. Evidence is presented to show that the results obtained by this rapid method compare very favourably with those obtained by following the standard procedure.The articles have been scanned in colour with a HP Scanjet 5590; 600dpi. Adobe Acrobat XI Pro was used to OCR the text and also for the merging and conversion to the final presentation PDF-format.mn2015mn201

The influence of varying maize supplements on the digestibility of the cellulose in a poor veld hay in relation to the bacterial population of the rumen of sheep with a note on the nitrogen metabolism

From the results of a series of metabolism studies on sheep with open rumen fistulae in which a basal ration of winter grazing was supplemented with meatmeal and increasing amounts of crushed maize it was found that: (1) Small amounts of meatmeal and supplements of maize ranging from 50 grams to approximately 150 grams per day favoured the growth of the rumen organisms. Heavier supplements of maize, on the other hand, tended to reduce the number of organisms in the rumen. (2) The increase in the bacterial count did not improve the digestibility of the cellulose in the winter grazing. A progressive depression in its digestibility with increasing supplements of maize was, however, observed. (3) The rectification of the existing protein deficiency in winter grazing with a minimum quantity of protein is futile unless its energy deficiency is simultaneously satisfied.The articles have been scanned in colour with a HP Scanjet 5590; 300dpi. Adobe Acrobat XI Pro was used to OCR the text and also for the merging and conversion to the final presentation PDF-format

The utilization of the phosphorus from an aluminium-iron rock phosphate. I. By the rat

The availability of the phosphorus in two samples of an aluminium-iron rock phosphate has been determined in the rat. In evaluating these products live weight gains, the ash content of the femurs and total phosphorus retention have been used as criteria. The rock phosphate was found to be a poor source of phosphorus.The articles have been scanned in colour with a HP Scanjet 5590; 300dpi. Adobe Acrobat XI Pro was used to OCR the text and also for the merging and conversion to the final presentation PDF-format