SummaryIn vitro bacterization of potato microplants with a pseudomonad bacterium, Pseudomonas spp.strain PsJN, induces developmental modifications which make them more hardy and more vigorous upon transplanting. The paper reviews previous experiments and presents recent data on the post-inoculation microplant generation response of genetically engineered and nonengineered clones, microplant response to CO 2 supplement, as well as the results of field experiments conducted between 1987 and 1993. Production of minitubers under greenhouse conditions and tuberization under heat stress in growth chamber are also presented. The use of the in vitro culture system for the development of microbial associations benefitting crop rotations is postulated.
In studies of the microflora associated with fuel storage tanks, a
Fusarium
species was isolated from No. 1 diesel fuel. The culture was identified as
F. moniliforme
Sheldon. Attempts were made to cultivate this organism with seven hydrocarbons of 99
+
mole per cent purity as the sole carbon source; growth of the fungal culture was supported only by
n
-decane and
n
-dodecane. A spore viability study of
F. moniliforme
in filter-sterilized diesel fuel with no free water showed that viability was retained for 9 months in this environment.
While sebum provides several functions in the integument, there is considerable interest in the control of excess sebum on the human skin. The primary function of sebum is to lubricate and waterproof the stratum cornenum layer, in addition to preventing hair from becoming brittle. In several cases, the secretion of sebum is inhibited as a result of blockage of the drainage pathway for the sebaceous glands which may result in abnormal skin conduction (1,2). Clinac™ OC (Oil Control) has been developed with a special oil adsorbing polymer, DVB/lsobornyl Methacrylate/Lautyl Methacrylate Copolymer (3). This particular copolymer posses the capacity to adsorb oils because of its high affinity for hydrophobic nonpolar substances. The purpose of this investigation is to show the adsorptive capacity of the acrylate copolymer in Clinac™ OC preparation and in buffer.The acrylate polymer was incubated in artificial sebum for 4 hrs and 8 hrs at 37 C.
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