Browsing Faculty of Science by Issue Date
Now showing items 21-40 of 1455
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Variation in Biscutella sempervirens (Cruciferae) in Spain
(Botanischer Garten und Botanisches Museum, Berlin-Dahlem, 1986)Study of 14 living population samples of Biscutella sempervirens from Spain revealed considerable variability in vegetative characters. Two varieties, one of which is new, are recognised. Experimental cultivation showed ... -
Environmental indices for the analysis of genotype X environment interaction in maize
(Maydica, 1986)One independent (physical) and two partially independent (biophysical) indices were compared with a dependent (biological) index for two sets of yield trials in maize (Zea Mays L.). The object was to investigate whether ... -
Genetic variability, heritability estimates, correlations and predicted responses to S1 selection for seedling emergence and yield in three maize populations
(Nigerian Journal of Agronomy, 1986-04-14)S1 families from three tropical maize (Zea mays L.) populations; FARZ 27, FARZ 34 and TzSR-W-l, were used to study genetic variation for emergence percentage (E%); emergence index (EI), emergence rate index (ERI) and yield. ... -
Inhibitory Action of Sulphated Chitin Derivatives on the Hydrolytic Activity of Thrombin
(1986-05)Heparin, an anticoagulant polysaccharide, inhibits thrombin activity which plays the most important role in the blood clotting process. It is known to accelerate neutralization of thrombin activity instantaneously in the ... -
Development of a slurry technique for the determination of cadmium in dried foods by electrothermal atomisation atomic absorption spectrometry
(pubs.rsc.org, 1986-08)A method is described for the the determination of cadmium in foods by atomic absorption spectrometry with direct slurry introduction into an electrothermal atomiser. Oxygen infusion facilitates in situ ashing of samples ... -
Occurence and Characteristics of HydroCarbon-Utilizing Bacteria in Nigerian Soils Contaminated with Spent Motor Oil
(1987)Soil samples were collected from four different oil-contaminated sites in Lagos, Nigeria, Enrichment of soil samples in a mineral salts medium containing SAE 40 motor oil as carbon source resulted in the isolation of eleven ... -
Extracellular Amylase Production by Cassava-Fermenting Bacteria
(Elservier, 1987)Fermentation of cassava tubers was accompanied by a gradual decrease in pH, increased amylase activity in the steep liquor, and increased microbial load and lactic acid concentration. Amylase-producing bacterial strains ... -
New lysine chromogenic substrates for trypsin
(Elsevier Science, 1987)Eight new direct chromogenic lysine substrates, namely N α-benzyloxycarbonyl-l-lysine 3, 5-dinitroanilide hydrochloride (l-ZLDA· Hcl), N α-benzyloxycarbonyl-l-lysine 3-nitroanilide hydrochloride (l-ZLNA· HCl), N ... -
Value of Petiole Anatomy in the Genus Biscutella L. (Cruciferae)
(Botanic Garden Meise, 1987)result of an investigation into the possible taxonomic value of comparative petiole anatomy in 46 taxa of the genus Biscutella (Cruciferae) is presented. The shape of the petioles varies from dorsiventrally flattened to ... -
Yield stability oil palm progenies in early and later years of production
(Nigerian Journal of Agronomy, 1987)The production of cultivars that are highly yielding and stable in performance over a wide range of environments is a major objective in the breeding of oil palm (Elaeis sp.). Progenies resulting from nine crosses of oil ... -
Synthesis of 4H‐3,3a‐dihydrothiazolo[4,3‐b]quinazolines
(Journal of Heterocyclic Chemistry, 1987-01)Regiospecific synthesis of 4H‐3,3a‐dihydrothiazolo[4,3‐b]quinazolines and 7‐methyl‐4H‐3,3a‐dihydrothiazolo[4,3‐b]quinazolines IVa and IVb is described. The N‐substituted thiazolidinecarboxylic acids Ia and Ib were converted ... -
Synthesis of 4H‐3,3a‐dihydrothiazolo[4,3‐b]quinazolines
(Wiley Online Library, 1987-01)Regiospecific synthesis of 4H‐3,3a‐dihydrothiazolo[4,3‐b]quinazolines and 7‐methyl‐4H‐3,3a‐dihydrothiazolo[4,3‐b]quinazolines IVa and IVb is described. The N‐substituted thiazolidinecarboxylic acids Ia and Ib were converted ... -
Studies on carboxymethyl derivative and cellulose obtained from cassava residue
(1988)Cassava residue, the material obtained after aqueous extraction of starch from pulverized cassava tubers, was converted to the carboxymethyl derivative of various acid capacities. The acid capacity in 1M KCl was in the ... -
Preparation and chromatographic application of hydrophobic supports from cassava cellulose
(1988)Hydrophobic groups have been incorporated into cassava cellulose to obtain benzyl, phenyl and octyl derivatives. These have been shown to bind serum proteins reversibly. The benzyl and octyl derivatives were used to ... -
Epidermal and Phytochemical Studies in the Genus Boerhuviu (Nyctaginaceae) in Nigeria
(Taylor and Francis Group, 1989)Boerhavia species are widely used in African traditional medicine. Four species of the genus occurring in Nigeria have been investigated morphologically and phytochemically. Epidermal cells are either polygonal in shape ... -
Speciation of cadmium in crab meat by reversed-phase high-performance liquid chromatography with electrothermal atomisation atomic absorption spectrometric
(pubs.rsc.org, 1989-03)The development of a model gut system has enabled the study of cadmium bioavailability to be carried out. The use of a biological membrane indicates that although soluble forms of cadmium may exist in the gut, only ... -
Interrelations among vegetative, yield and bunch quality traits in short-stem oil palm progenies
(Kluwer Academic Publishers, 1989-04-04)Breeders usually obtain information on a large number of traits in their breeding and selection programmes. However, since some or many of these traits could be related, it is desirable to reduce the number being handled ... -
Studies on the antigenic S-type lipopolysaccharides of Brucella abortus strains 7 and Mustapha
(Elsevier, 1989-06)Antigenic phenol phase S-type lipopolysaccharides (LPS) isolated from Brucella abortus (B. abortus) strains 7 and Mustapha were observed to have 13C n.m.r. spectra which were almost identical to the one reported for the ... -
Studies on the chemical constitution of the cell-wall lipooligosaccharide from Campylobacter coli, Labet 227
(Elsevier, 1989-06-03)The lipo-oligosaccharide (LOS) from Campylobacter coli Labet 227 was extracted by aqueous phenol. After delipidation and gel chromatography, two oligosaccharides were isolated. The higher molecular weight material OS (I) ... -
Optimum time for yield evaluation and selection in the oil palm (Elaeis guineensis Jacq.)
(Oleagineux, 1989-11)Three Deli dura x tenera crosses and five dura x tenera crosses plus a standard cross as check were evaluated for 20 years and the yield data were used to determine the optimum time for yield evaluation and selection in ...