Browsing Natural and Agricultural Sciences by Title
Now showing items 691-710 of 2708
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Die bepaling van die hoeveelhede kalium en fosfor wat vir hoër plante in die grond toeganklik is
(North-West University (South Africa), 1967)"Abstract not -
Die berekening van die differensiële intensiteit van kosmiese strale
(North-West University (South Africa), 1981)THE CALCULATION OF DIFFERENTIAL RESPONSE FUNCTIONS OF COSMIC RAYS. A theoretical review is given of existing and new methods for the calculation of differential response functions from latitude surveys. The two existing ... -
Die bestudering van die meganisme van hartspierkontraksie met behulp van kalium-kontraktuur
(North-West University (South Africa), 1972)In the above study potassium contracture was used. This study showed that two characteristic kinds of potassium contracture patterns occured which consisted of different components or phases. However in both contracture ... -
Die bevolkingsdinamika van die getalsdominante soöplanktonspesies in Boskopdam, Transvaal
(North-West University (South Africa), 1976)1. Die Cladocera- en Copepodaspesies wat in Boskopdam voorkom is geidentifiseer. Dit is gevind dat D. puZex en D. Zongi spina die getalsdominante spesies in die dam is. 2. 'n Submonsterneemmetode is gestandaardiseer en ... -
Die bevolkingsdinamika van vyf medies en veeartsenykundig belangrike varswaterslakspesies onder toestande van beheerde temperatuur
(North-West University (South Africa), 1973)"Abstract not copied" -
Die biologiese beheer van Fusarium oxysporum f. sp. dianthi op angeliere
(North-West University (South Africa), 1994)Biological control is a natural form of control. Man tries to manipulate one part of the environment in such a way as to control another. The aim of this study was to find a biological control agent for Fusarium o-xysporum ... -
Die bydrae van die sandfraksie tot katioonadsorpsie in gronde
(North-West University (South Africa), 1972)Models that have been set up to explain cation adsorption in soils and clay minerals are based on cation exchange. The applicability of the models depend to a great extent on the experimental terms in the adsorption equation. ... -
Die chemie van die indeenfotodimeer en verwante verbindings
(North-West University (South Africa), 1969)Oxidation of the crude dimer of indene, produces the diketone (XII), as well as a small quantity of a-truxone (XVI). The diketone (XII) reacts like a typical carbonylic compound when treated with reducing agents such ... -
Die chemiese beheer van Pachystigma pygmaeum [Schltr.] Robyns
(North-West University (South Africa), 1970)A comparative investigation of the influence of the herbi cides Tordon 22K, Tordon 22K + 1.0 percent DMSO,·Tordon 101, 2, 4-D and 2, 4, 5-T on Pachystigrna pygmaeurn (Schltr.) Robyns was carried out in order to establish ... -
Die deuteronaktivering van die eerste oorgangsreeks
(North-West University (South Africa), 1970)In hierdie ondersoek is twee moderne skyfmaaktegnieke nl. molekulere platering en elektrosproei bestudeer en gebruik vir die bereiding van skywe in die molekulere vormo Die metodes kan veral suksesvol toegepas word by ... -
Die doeltreffendheid van verskillende suiwerings- en verspreidingsmetodes ten opsigte van die mikrobiologiese kwaliteit van drinkwater
(North-West University (South Africa), 1978)"No abstract" -
Die effek van sikliese adenosien-3':5'-monofosfaat op hemoglobien-biosintese
(North-West University (South Africa), 1974)Although cAMP may be involved in the regulation of protein biosynthesis in certain eukaryotic cells no decisive relationship between hormonal action, cAMP and the regulation of translation could be found in the literature. ... -
Die ekstraksiekinetika van nikkel en palladium met difenieltiokarbasoon
(North-West University (South Africa), 1972)"Abstract not copied" -
Die elektroherwinning van Fe en H2SO4 uit ’n FeSO4-logingsoplossing met behulp van anioonruilmembrane
(North-West University (South Africa), 2019)The purpose of this study was to develop an economical, safe and environmentally friendly electrochemical process for the conversion and recovery of Fe and H2SO4 from a FeSO4 leaching solution. For this purpose, two basic ... -
Die finansiering van landboukoöperasies in Suid-Afrika
(North-West University (South Africa), 1972)"No abstract available" -
Die fisieke werkvermoë (W170) van aktiewe en onaktiewe Blanke dames tydens sekere dae van die menstruale siklus
(North-West University (South Africa), 1973)The ability of the cardio-vascular system to supply the body tissues with oxygen determines the physical working capacity of an individual. Several physiological parameters such as oxygen ventilation rate, pulse rate ... -
Die geologie en petrologie van die wonderfonteingang
(North-West University (South Africa), 2022)The Wonderfontein dyke is one of the longest composite dykes of the Pilanesberg dyke-swarm. It can be traced from Pilanesberg where it cuts the outer rings of syenite and nepheline syenite, over the Magaliesberg to ... -
Die hervestiging van plantegroei op versteurde gebiede in nasionale padreserwes
(North-West University (South Africa), 1981)Extensive areas of vegetation are disturbed, damaged or destroyed during the construction of freeways in Southern Africa. Due to the heterogeneous climate soiI and topographical conditions in Southern Africa, disturbance ... -
Die hittebeskadiging van die weefsels en van die intakte dier-'n biochemiese benadering
(North-West University (South Africa), 1972)"Abstract not copied" -
Die inhibisie van die hepatitis B-virus oppervlakantigeen deur van antisin tegnologië gebruik te maak
(North-West University (South Africa), 1997)The Hepadna virus family is a major annual cause of suffering and loss of life. The Hepatitis B virus is one of the most important causes of this phenomenon, since it is endemic in large parts of the world. This virus ...