By J. ARTHUR HARRIS, Head, Department of Botany, University of Minnesota, and Collaborator, Bureau of Plant Industry, United States Department ofAgriculture; W. F. HOFFMAN, Assistant Professor of Agricultural Biochemistry, University of Minnesota, formerly {1920-1924) Field Assistant, Alkali and Drought Resistant Plant Investigations, and Biophysical Investigations, Bureau of Plant Industry, Un...

An investigation was performed to determine whether corrosion resistant boron-free E-glass fibers could adequately prevent acid induced brittle fracture failures of high voltage composite insulator rods. Nine different rod compositions were tested at 45% of mechanical failure load in contact with 1 N nitric acid. Rods made out of commonly used E-glass fibers failed mechanically in less than 2 h...

ment methods and two spec/imen diameters. Flexural strength and modulus of woven glass fiber-reinforced specimens werc significanLly greater than those without woven glass fiber (p<O.OD, Likewise, comprossive strength of reinforced specimens was signifieantly greater than those without woven glass fiber (p<O.Ol), except for specimens rcjnforced with woven glass fiber oriented at a tilt directio...

The aim of this investigation was to measure the flexural and compressive strengths and the corresponding moduli of cylindrical composite specimens reinforced with woven glass fiber. Test specimens were made by light-curing urethane dimethacrylate oligomer with woven glass fiber of 0.18-mm standard thickness. Tests were conducted using four reinforcement methods and two specimen diameters. Flex...

objective: contradictory results have been reported over microleakage studies of restorative materials and methods. despite the number of publications on leakage there are few evidences comparing the different microleakage evaluation methods. the purpose of the present study was to compare the clearing technique and longitudinal sectioning in the evaluation of dye penetration along a glass fibe...

The use of sound absorbers on many ships made from glass wool. Glass wool has a negative impact health, which can irritate the skin and disrupt respiratory system. Therefore, it is necessary to have an alternative insulation material that eco-friendly capabilities comparable wool, also be used as heat ships. These ingredients are materials natural fiber. This research using coconut fiber by soa...

In recent years, with the rapid development of biomass combustion power generation and heat as main application industry, amount byproduct biological ash is also increasing year by year. How to effectively utilize in a more green, environmental friendly economic way has become research hotspot. view problem that mechanical properties cement stone decreased when conventional latex was used tough...

The effective activation and utilization of metakaolin as an alkali activated geopolymer precursor and its use in concrete surface protection is of great interest. In this paper, the formula of alkali activated metakaolin-based geopolymers was studied using an orthogonal experimental design. It was found that the optimal geopolymer was prepared with metakaolin, sodium hydroxide, sodium silicate...

Statement of the problem. The fracture of acrylic resin dentures remains an unsolved problem. Therefore, many investigations have been performed and various approaches to strengthening acrylic resin, for example, the reinforcement of heat-cured acrylic resin using glass fibers, have been suggested over the years. But problems such as poor workability, rough surface, poor adhesion of glass fiber...