检索结果-南通市图书馆

Studying the Law of the Movement of Cotton Particle on a Saw Cylinder and the Interaction with Saw Teeth

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Engineering（科研） 2019年第10期11卷 717-725页

作者： jamoliddin ergashev Khamid Akhmedhodjaev Abdusamat Karimov Juramirza Kayumov Rashida ergasheva Shohruxmirzo Mahsudov Namangan Institute of Engineering and Technology Namangan Uzbekistan

This article investigates the movement trajectory of the cotton particle from Point D of belt transporter of the saw gin camera to Point B of the saw cylinder. In other words, the forces acting on the cotton particle and the equations of their interactions are developed, where, the differential equation of the law of movement of the cotton particle “belt + saw” is made according to the d’Alembert principle. Arc-BD of cotton particle gives the length of the arc of their fall on the saw teeth. The maximum separation of fibers and the quality of separation of fiber from seeds, as well as the time (t) of rapid separation of fiber from seeds, depend on the length of the arc-BD, because the critical length of the arc-BD makes it possible to reduce the multi-layering of the falling cotton particle on the saw teeth. In this scientific research work, patented by the new working camera of the saw gin, the trajectories of the movement of the cotton particles along the arc-DB, as well as the trajectory of the move in the direction of the grate are studied. The results of the study show that the number of fibers increases along the height of the teeth of the saw with one touch. This leads to a decrease in the average stay of seeds in the working chamber of the gin. As a result, the efficiency of the saw gin is increased.

关键词： Cotton Particle Belt Conveyor Saw Cylinder Grate Cotton Seeds Cotton Fiber Net Surface

Plasma for cancer treatment: How can RONS penetrate through the cell membrane? Answers from computer modeling

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Frontiers of Chemical Science and Engineering 2019年第2期13卷 253-263页

作者： Annemie Bogaerts Maksudbek Yusupov jamoliddin Razzokov Jonas Van der Paal Research group PLASMANT Department of ChemistryUniversity of AntwerpBE-2610 Antwerp-WilrijkBelgium

Plasma is gaining increasing interest for cancer treatment, but the underlying mechanisms are not yet fully understood. Using computer simulations at the molecular level, we try to gain better insight in how plasma-generated reactive oxygen and nitrogen species (RONS) can penetrate through the cell membrane. Specifically, we compare the permeability of various (hydrophilic and hydrophobic) RONS across both oxidized and nonoxidized cell membranes. We also study pore formation, and how it is hampered by higher concentrations of cholesterol in the cell membrane, and we illustrate the much higher permeability of H2O2 through aquaporin channels. Both mechanisms may explain the selective cytotoxic effect of plasma towards cancer cells. Finally, we also discuss the synergistic effect of plasma-induced oxidation and electric fields towards pore formation.

关键词： plasma medicine cancer treatment computer modelling cell membrane reactive oxygen and nitrogen species

Biotechnological Assessment of Suaeda arcuate under in Vitro Conditions

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Advances in Bioscience and Biotechnology 2023年第8期14卷 359-367页

作者： Khulkar Khalbekova jamoliddin Ziyavitdinov Institute of Bioorganic Chemistry Academy of Sciences of the Republic of Uzbekistan Tashkent Uzbekistan

This article presents data on the introduction of in vitro culture and microclonal propagation of plants identified in the group of hyperhalophytes belonging to the species Suaeda arcuata Bunge. This study was carried out to optimize the composition of nutrient media for the main stages of reproduction in vitro, as well as studies on the rooting and adaptation of regenerants for species of the genus Suaeda obtained from axillary or apical buds, but more often from stem segments with a node. In this work, hormones of the cytokinin and auxin series, or a combination of them, were added to the nutrient environment for growth activation. The analyzing of microplants for the content of soluble in water B vitamins was carried out. As a result of the research, it was found that intact Suaeda arcuata plants in their natural habitats produce a large amount of soluble in water vitamins: riboflavin—0.062% and thiamine up to 0.006%. And in regenerated plants obtained on media without hormones, the content of vitamins was: B2 0.053%, B1 0%, respectively, and with a combination of 1/2 MS + 1 mg/l 6-BAP + 0.3 mg/l IAA + 2, 4-D, the content of vitamins varied as follows: riboflavin—0.059%, folic acid—0.030%, and thiamine was not detected. The cultivation of regenerates on the environment 1/2 MS + 1 mg/l 6-BAP + 0.3 mg/l IAA + 2,4-D showed the best effect on the growth of regenerants, created the possibility of obtaining the maximum amount of biomass and accumulation of B vitamins.

关键词： Aralkum Hyperhalophyte In Vitro Explant Sterilization Seeds Micropropagation

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

中乌合资纺织企业质量管理体系构建研究

中乌合资纺织企业质量管理体系构建研究

作者： VAKHABOV jamoliddin 兰州理工大学

学位级别：硕士

市场全球化程度的加深给纺织业带来了新的机遇与挑战,乌兹别克斯坦作为中亚地区经济中心国家和独立体国家之一,对中国轻工业市场的需求量有巨大的前景。质量问题是当今世界所有企业都必须关注的问题,目前纺织制造商良莠不齐,产品质量问... 详细信息

市场全球化程度的加深给纺织业带来了新的机遇与挑战,乌兹别克斯坦作为中亚地区经济中心国家和独立体国家之一,对中国轻工业市场的需求量有巨大的前景。质量问题是当今世界所有企业都必须关注的问题,目前纺织制造商良莠不齐,产品质量问题是亟待关注和考核的关键问题。质量是企业发展的核心基础,更是市场竞争的基础,对中乌合资纺织企业质量管理的研究对两国间的合作以及整个纺织行业发展都有重要的意义。本文以一家中乌合资纺织企业为例,通过问卷调查及考察访问等方式,结合ISO9000质量管理体系、全面质量管理等质量管理方法,尝试分析该企业在质量管理中的不足与原因。针对中乌合资纺织企业的不足,本文结合中、乌两国的质量管理特点,提出了在质量方针与质量目标的制定、质量管理组织机构的建立、材料采购过程质量管理体系构建、产品设计开发过程的质量管理体系构建、售后服务过程的质量管理体系构建、企业质量文化建设等方面的质量管理改进与体系构建的建议,并尝试对中乌合资纺织企业质量管理体系的实施提出了诸多可行性建议。这对今后合资纺织企业在质量管理方面的探究提供借鉴。

关键词：中乌合资质量管理体系纺织企业