Hemp (Cannabis sativa L.) is a species considered as having one of the most complicated mechanisms of sex determination. Peroxidase and esterase isoenzymes in leaves of the two sexual phenotypes of hemp were studied. Significant differences in isoperoxidase and isoesterase patterns were found between male and female plants, both in the number and stain intensity of bands. For both esterase and ...

A toxicological study was conducted to evaluate the potential conflict between extended consumption of hemp food products and workplace drug-testing programs in the United States. Fifteen volunteers ingested hemp/canola oil blends containing four different concentrations of delta9-tetrahydrocannabinol (THC), each over a 10-day period. Corresponding THC doses ranged from 0.09 to 0.6 milligrams p...

High-altitude electromagnetic pulse (HEMP) radiated from both primary and secondary currents, which are induced by a nuclear explosion, is computed by using the Jefimenko’s equation. The effects of geomagnetic field is considered in computing the primary current, and the rough sea surface is considered in computing the reflected electric field in the frequency domain. The waveforms of HEMP near...

This study characterizes the acoustical behavior of natural fiber composites. Regenerated cellulose fibers (Lyocell), hemp fibers, and flax fibers were embedded in an epoxy-matrix. These unidirectional composites were tested for their logarithmic damping decrement, the resonance frequency, the ultrasound velocity, the dynamic and static modulus of elasticity, and bending strength and density. G...

Greenhouse studies were conducted in 2006 to evaluate the effects of urea ammonium nitrate (UAN) solution on bispyribac and penoxsulam efficacy on barnyardgrass and hemp sesbania. Bispyribac and penoxsulam treatments containing an adjuvant and UAN significantly reduced barnyardgrass biomass over most treatments without UAN. Urea ammonium nitrate did not increase hemp sesbania biomass reduction,...

Concrete development has gone so far since the revolution of human kind. Climate change, energy conservation, and life cycle examination problems are majors that have accorded to quick augmentation plant-based materials for buildings, which can be entitled as environmental eco friendly, enduring efficient multidisciplinary materials. Recently, several approaches in action order develop concrete...

Natural fibres have recently become an attractive alternative to synthetic in the implementation of polymer composite structures. Inherent flaws within natural terms their constituent contents (hemicellulose, cellulose, and lignin) reduce compatibility these with matrices. In this study, effects chemical treatments on hemp resulted polyester matrix are investigated. The were treated alkali (0–1...

Regenerated cellulose fibres are an important part of the forest industry, and they can be used in form fabrics as reinforcement materials. Similar to natural (NFs), such flax, hemp jute, that widely automotive these possess good potential for semi-structural applications. In this work, mechanical properties regenerated fabric-reinforced poly methyl methacrylate (PMMA) (Elium®) composite were i...