The Distribution of Root-Knot and Reniform Nematodes in Arkansas, 1990-1999

Surveys sampled 12,581 cotton fields in Arkansas from 1990-1999 for the presence of plant parasitic nematodes. University of Arkansas nematologists, county agents, of professional consultants collected composite samples each fall from August 15 to November 15. Each composite sample consisted of a minimum of 15 soil cores taken to a depth ..

Flame Modification of the Surface of Plastics Articles.

Researchers reviewed the general objective of surface modification of plastics, particularly the hydrocarbon combustion conditions of flame modification, and analyzed the effects of flame modification on polyolefinic products. Flame modification is advantageous and complementary to the corona discharge technique. The effects of polypropyl..

Minimizing Cotton Stress from Herbicide Use and Seedling Disease in Roundup Ready Cotton

Experiments from 1998-1999 determined the effects of different weed and disease control strategies on Roundup Ready cotton seedling stands, stress, and seed cotton yields. Weed control strategies included a conventional full season program of Treflan 4E, Zorial Rapid, Cotoran 4L, MSMA 6E, Cy-Pro 4E; Cotoran 4L, Zorial Rapid 80, and Roundu..

The Course of Mg(OH)(2) Modified Polyethylene Extrusion Process.

An experiment modified medium density polyethylene (MFI of 0.712 gram per 10 minutes) with Mg(OH)(2), FR-20 grade, with a particle size of 2.5 microns. Antiblocking and lubricating agents 020-04, 020-15, and Lifoslip 220 PE were added as polyethylene concentrates. Extrusion in a Brabender plastic corder occurred at a screw speed of 0.75 s..

The Solubility Parameter of Chlorosulfonated Polyethylene.

Researchers measured six binary solvent mixtures for their rising bound chlorine contents to characterize the equilibrium swelling maxima of chlorosulfonated polyethylene vulcanizates and evaluate the one component (delta) and multiconponent (delta(0)) solubility parameters of delta = 18.2, 19.2, and 19.6 megapascals(1/2) and delta(0) = 1..

Analysis of Hydroperoxides in Solid Polyethylene by NMR and EPR Spectroscopy.

Carbon 13 magic angle spinning nuclear magnetic resonance spectroscopy directly observed the hydroperoxide species in gamma-irradiated carbon 13 polyethylene. Experiments did not require special sample preparation, such as chemical derivatization or dissolution. Annealing experiments focused on thermal decomposition of the hydroperoxide s..

The Melamine Resin Fiber Basofil.

BASF's Basofil melamine fiber results from a condensation reaction with formaldehyde to form reactive methylol compounds. The methylene products form a network structure within the condensation resin that yields the properties of the fiber. Basofil features a high limiting oxygen index value, heat resistance, and hardness. The fiber has n..

Synthesis and Properties of Fiber-Grade Gelatin-g-Polyacrylonitrile Grafted Copolymers.

Researchers grafted gelatins boiled out of chrome tanned waste leathers with polyacrylonitrile (PAN) in an aqueous zinc chloride solution in the presence of K(2)S(2)O(8) as an initiator and assessed the content of fiber forming polymers in the postreaction solutions, degree of conversion of the monomer, degree of grafting of PAN onto the ..

Combustion Terminologies Defined.

An overview of textile combustion defines commonly used terms and explains the steps in textile combustion. The major elements of combustion are fuel, heat, and oxygen. Heat applied to a substrate raises the substrate temperature and initiates thermal decomposition. Combustion occurs as gases evolve from the degrading substrate and combin..

Liquid Crystalline Block Copoly(etherester)s.

A literature review addresses the synthesis and characteristics of copoly(ether-ester)s containing a liquid crystal polyester segment. Multiblock copoly(ether ester)s have a poly[p,p'-bis(alkylene benzoate)] or a polyester hard segment based on terephthalic acid and hydroquinone, copoly(ether ester)s of terephthalic acid and hydroquinone,..