Plant resistance developing research

In Japan, pilot plant quantities of rayon and cotton grafted with styrene and other monomers have been prepared and evaluated. Improvements in the flex abrasion resistance and good water repellency were obtained. In addition, thermoplasticity was imparted plus an improved adhesion to rubber. Arthur et al. have also studied this type of grafted cellulose fibers. Again, the work has not led to any large scale developments. Research into grafting to textiles is continuing, but the prospects for any early successful industrialization seem remote. 

Plant cell culture methods constitute a most exciting part of food biotechnology research and development with many areas for food improvement, involving plant production, plant resistance and functionality, nutritional quality of plant foods and production of natural food ingredients (A9-51). 

Developing Research Trends in the Chemistry of Plant Resistance to Pests... 

Resistance of vTKM6f plants to SSB is probably due to the production of certain allomones which inhibit oviposition and disrupt the insect s growth and development. Some of these factors, such as compound A, have recently been identified and synthesized in collaboration with the Tropical Development Research Institute (formerly Tropical Products Institute), London (20). The allomones in the resistant TKM6 variety thus account for inhibition of SSB oviposition and for adverse effects on egg (embryonic), larval and pupal (post-embryonic) stages. On the other hand, nine wild rices (four . minuta J.S. Presl., four 0 officinalis Wall ex. Watt, and one (). punctata Kotschy ex. Steud.) had no compound A in their plant volatiles, but a few were still toxic to SSB (21). This confirms that allomones other than compound A may also be involved in SSB resistance. The role of nutritional factors in growth of SSB larvae remains yet to be studied. 

Gerhold et al. (9) developed research techniques to Identify the biochemical metabolite which conditioned resistance. They used the same plant materials that had been Included In Winner s genetic studies and Stark s research. All plants were grown from seed and were maintained without the use of pesticides. Included In their study was a resistant parent, a homozygous recessive susceptible parent, and their hybrid. In addition, they tested a susceptible parent which had one dominant locus for resistance. Basically their technique Involved the collection of exudate and subsequent analysis by gas- and high-performance-liquid chromatography, mass spectrometry, and nuclear magnetic resonance (NMR) spectroscopy. 

As of file early 1990s the hislnrieal importance of coball ill alloys for reducing wear resistance was markedly diminished by the development of Norem alloys, which were derived from stainless steel, particularly the Armco Nitronic 60. admittedly one of the few stainless steels that has excellent wear resistance. This is an outgrowth of research conducted by EPRI (Electric Power Research Institute) in an effort to lower equipment costs. Initial uses of the new cobalt-frec alloys will he power plant valves and turbines. Also. In nuclear reactor applications, the Nnrem alloys will not become activated [Co does), reducing worker-protection and maintenance costs. Tests have confirmed that the new cobalt-free alloys retain their wear-resistant properties when produced as rods and powders, the most common forms used by welders. 

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