Circular hollow sections (CHS) offer a variety of constructional and architectural advantages. Up to now, section structures have usually been connected by welding, more rarely bolting. However, these established connection methods disadvantages. Despite its great success in the mobility sector, adhesive bonding is not yet used for joining steel construction. Adhesive bonding, however, has sign...

A floor rock roadway under an oblique straddle working face is a typical dynamic pressure roadway. Under the complex disturbance of excavation engineering works, often undergoes stress concentration and severe deformation damage. To solve problem surrounding stability control for this type, study considered East Forth main transport in strata 1762(3) Pansan coal mine. In situ ground monitoring ...

In this study, different plate fixing designs were tested in order to improve rock bolting performances. Instead of commonly used steel nuts, investigated by both laboratory and site studies. addition, the usability nuts energy absorbers made polyamide type engineering polymer was assess whether they are advantageous for aim supplying high-energy absorbing features. experimental deformation-con...

An ongoing resurgence of occupational lung disease among coal miners in the United States has been linked to respirable crystalline silica (RCS). To better protect miners, a deeper understanding key exposure factors is needed. As part larger investigation RCS 15 mines, this paper describes analysis mass content two types samples: (1) mine dust (RCMD) collected standardized locations each mine; ...

Sugar beet (Beta vulgaris altissima) is a biennial root crop with an absolute requirement for cold exposure to bolt and flower, a process called vernalization. Global DNA methylation variations have been reported during vernalization in several plants. However, few genes targeted by DNA methylation during vernalization have been described. The objectives of this study were to identify different...

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...