Zobrazeno 1 - 10
of 32
pro vyhledávání: '"G. F. R. Gerischer"'
Publikováno v:
Cellular and Molecular Neurobiology. 19:209-221
The culture supernatant of Thermomyces lanuginosus strains MED 2D and MED 4B1 had high activities of xylanase with low inducible activities of β-xylosidase. The crude xylanase was optimally active at 70 °C and at pH 6.0 to 6.5. Subsequently Eucalyp
Autor:
W. J. van Wyk, G. F. R. Gerischer
Publikováno v:
The Southern African Forestry Journal. 182:5-8
SYNOPSIS For the purpose of Part 2 of this investigation, 14-year-old E. dunnii trees grown from seed of three different localities in Australia were chipped, screened and pulped using the Kraft process. The trees grown from seedlots 10411 and 11705
Publikováno v:
The Southern African Forestry Journal. 182:55-58
SYNOPSIS The species Gardenia thunbergia was evaluated for mechanical and physical properties of its timber. As a result of its hardness and toughness it could be used for tools, implement handles, buttons and agricultural implements. The wood has a
Publikováno v:
South African Forestry Journal. 172:25-30
SYNOPSIS Two procedures of resin moulding powder preparation were evaluated. Their results are discussed on the basis of their tensile properties for moulded dumb-bells. The best procedure was then implemented for future work on phenolated pitch/ligi
Publikováno v:
South African Forestry Journal. 172:31-39
SYNOPSIS Equal mixtures of phenosolvan pitch and autohydrolysis bagasse lignin in the presence of either acid or alkaline catalyst and without catalyst were submitted to a thermal treatment stage at 230°C (Phenolation). Each of the phenolated produc
Autor:
W. J. van Wyk, G. F. R. Gerischer
Publikováno v:
South African Forestry Journal. 170:1-5
SYNOPSIS For the purpose of Part I of this investigation, eight eucalypt species (irrespective of provenance), 12 years of age and grown along the northern slope of Stellenbosch mountain in the Western Cape were chipped, screened and pulped using the
Publikováno v:
hfsg. 48:244-253
Publikováno v:
South African Forestry Journal. 163:31-35
SYNOPSIS Formosan alder (Alnus formosana) was introduced into South Africa in 1982. The species proved to be site specific. On deep, well drained but moist soils it grows fast producing timber in excess of 20 m3/ha per annum at eight years of age. Pr
Publikováno v:
Holzforschung. 46:253-256
Incorporation of autohydrolysis bagasse lignin into phenol, cresylic acids novolac systems via the phenolation route and a pitched-lignin mixture for binders in cellulose-based composities was studied by differential scanning calorimetry (DSC)
Publikováno v:
Holzforschung. 46:249-252
The use of autohydrolisis bagasse lignin for incorporation into phenolic novolac systems lignin mixture used for binding of wood-like materials was studied. The phenolic raw materials selected were phenol and cresylic acids to confer special properti