Abstract Background Lettuce ( Lactuca sativa L.), one of the most economically important leaf vegetables, exhibits early bolting under high-temperature conditions. Early leads to loss commodity value and edibility, leading considerable waste resources. However, initiation molecular mechanism underlying induced by high temperature remain largely elusive. Results In order better understand this p...

Roof bolting is the most popular type of support for underground mines’ workings. However, in Polish coal mines it used only as a supplementary support. To raise effectiveness and economic score horizontal development works, JSW (Jastrzębska Spółka Węglowa) started project to introduce independent rock its mines. The key element monitoring mine workings supported with roof bolting, appropriate ...

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 ...