Scientific Research Publishing

Read  full  paper  at: http://www.scirp.org/journal/PaperInformation.aspx?PaperID=53989#.VN23TyzQrzE Author(s)  Dimitra A. Loka , Derrick M. Oosterhuis , Cristiane Pilon Affiliation(s) Altheimer Laboratory, Department of Crop, Soil and Environmental Sciences, University of Arkansas, Fayetteville, AR, USA . ABSTRACT Polyamines, putrescine (PUT), spermidine (SPD) and spermine (SPM) are implicated in plants’ responses under conditions of abiotic stress. Previous research in other crops has indicated that polyamines and changes in their concentrations are associated with drought tolerance under conditions of water-deficit stress; however, no information exists on cotton (Gossypium hirsutum L.). Growth chamber experiments were conducted with two cotton cultivars differing in drought tolerance, ST5288B2F (drought-sensitive) and Siokra L23 (drought-tolerant) in order to investigate the distribution of free polyamines, the effect of water-defic...

Read full paper at: http://www.scirp.org/journal/PaperInformation.aspx?PaperID=52432#.VJi-jcCAM4 Author(s) Muradov Rustam Muradovich 1* , Karimov Abdusamat Ismonovich 1 , Mardanov Botir Mardanovich 2 Affiliation(s) 1 Department of Scientific Affairs, Namangan Institute of Engineering and Technology, Namangan, Uzbekistan . 2 Department of Primary Cotton Cleaning, Tashkent Institute of Textile and Light Industry, Tashkent, Uzbekistan . ABSTRACT The present manuscript deals with theoretical and experimental studies of the effect of inclined scraper on removal raw cotton from mesh surface. The mathematical model of the problem and theoretical studies of the motion of cotton mass on plane of scraper is derived takin...