Riding tandems with nature

Article Abstract:

The participants of the NATO workshop on Manipulation of Organization in Polymers Using Tandem Molecular Interactions held in Italy from May 28 to June 2, 1996, discussed different methods for polymer formation using tandem interactions and processes. Chevron-like materials are formed from polymers in which the main chain forms the liquid-crystalline phase. These structures are stronger than ordinary liquid-crystal (LC) materials. Different tandem interactions are observed in ferroelectric liquid crystals and ferroelectric LC-elastomers.

Conferences, meetings and seminars, Reports, Polymer liquid crystals, Liquid crystalline polymers, Block copolymers

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Patenting nature now

Article Abstract:

The patenting of neem products by the company W.R. Grace has been criticized in Europe and US. The agricultural and medical properties have been known to the indigenous population of the Indian subcontinent for centuries and patenting makes these products private items rather than public. However, the active ingredients have been scientifically identified and incorporated into products by companies. Thus the patents should be evaluated by the applicable laws and not by their conflict with traditional knowledge and methods.

Chemicals & Allied Products, Chemical Manufacturing, CHEMICALS AND ALLIED PRODUCTS, Social aspects, Chemicals, Intellectual property, Chemical industry, Patent law, GRA, W.R. Grace & Co., Margosa, Neem

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Weak trophic interactions and the balance of nature

Article Abstract:

Complexity is shown by ecological models to destablize food webs. Nonlinear models have been used to study the influence of interaction strength on food-web dynamics away from equilibrium. The results suggest that weak to intermediate strength links promote community persistence and stability, while weak links dampen oscillations between consumers and resources, tending to maintain populations densities away from zero.

Observations, Food chains (Ecology), Food chains

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