In this work, the problem of water inflow reduction in Ukrainian coal mines, which are distinguished by difficult hydrogeological conditions, was considered. A numerical study change into a mine working when it crosses tectonic fault carried out. The cases permanent supported frame supports and roof bolts were calculation stress fields, zones with inelastic deformations coefficients permeabilit...

PROBLEM Incident investigation reports do not usually contain enough information to aid in studying boom arm vertical speed for roof bolting machines to determine the impact that appendage speed had on an operator's risk of experiencing a contact. Laboratory experiments with human subjects are also not feasible because of safety and ethical issues. METHOD Researchers successfully developed a ...

Greenhouse-grown oilseed rape (Brassica napus, annual Canola variety ;Westar') plants were harvested at six dates from the vegetative phase until the early pod (silique)-fill/late flowering stage. Endogenous gibberellin (GA)-like substances were extracted from stems, purified, and chromatographed on silica gel partition columns prior to bioassay in serial dilution using the ;Tan-ginbozu' dwarf ...

to determine tetraploid pollinators resistant to cercospora leaf spot disease and bolting with optimum yield and quality, five tetraploid pollinators were crossed with a male sterile line, sb17. the hybrid seed was harvested from the male-sterile line. the hybrids together with four controls including resistant and susceptible cultivars (a total of 9 cultivars), were evaluated in a randomized c...