Growth Ability of “Kerosene Fungus” Amorphotheca resinae Strains Isolated from Different Habitats in Aviation Fuel

作者： Krivushina   A.   A.     Bobyreva   T.   V.     Mokeeva   V.   L.   来源： Biology Bulletin Reviews 年份： 2023 文献类型 ： 期刊 关键词： biodestructor   Aviation   Fuel   micromycetes   of   biodeterioration  

描述： The species Amorphotheca resinae is best known among micromycetes that deteriorate aviation fuel. It lives in natural conditions in various biogeocenoses and is known as a component of soil mycobiota. Micromycetes of this type have the ability to obtain the necessary carbon for life from hydrocarbon fuel. This happens through the breakdown of complex hydrocarbons to simpler compounds. The growth of A. resinae in fuel leads to numerous problems associated with the operation of aviation equipment: destruction of nonmetallic materials, increased corrosion of metal elements, and clogging of fuel filters with mycelial biomass. According to some literature sources, not all strains of this species living in natural conditions can absorb petroleum hydrocarbons. According to other data, there is a tendency that the ability to absorb hydrocarbons is becoming characteristic of an increasing number of soil strains of A. resinae. The authors have studied the growth capacity of seven strains of A. resinae isolated from various aviation fuel samples and seven strains isolated from different geographical locations and substrates: soil, air, wood, and rooms. Among the studied strains of A. resinae were both those able to develop due to aviation fuel hydrocarbons and those without this ability. At the same time, visual and quantitative methods for evaluating the growth rate and intensity of the studied fungi strains do not exclude each other and give comparable results. A. resinae strains isolated from fuel samples demonstrated much more active development compared to strains isolated from natural habitats. Five strains of A. resinae isolated from different geographical locations of fuel samples showed almost the same degree of development in the amount of biomass formed during one month.

Growth Ability of “Kerosene Fungus” Amorphotheca resinae Strains Isolated from Different Habitats in Aviation Fuel

作者： Krivushina   A.   A.     Bobyreva   T.   V.     Mokeeva   V.   L.   来源： Biology Bulletin Reviews 年份： 2023 文献类型 ： 期刊 关键词： biodestructor   Aviation   Fuel   micromycetes   of   biodeterioration  

描述： The species Amorphotheca resinae is best known among micromycetes that deteriorate aviation fuel. It lives in natural conditions in various biogeocenoses and is known as a component of soil mycobiota. Micromycetes of this type have the ability to obtain the necessary carbon for life from hydrocarbon fuel. This happens through the breakdown of complex hydrocarbons to simpler compounds. The growth of A. resinae in fuel leads to numerous problems associated with the operation of aviation equipment: destruction of nonmetallic materials, increased corrosion of metal elements, and clogging of fuel filters with mycelial biomass. According to some literature sources, not all strains of this species living in natural conditions can absorb petroleum hydrocarbons. According to other data, there is a tendency that the ability to absorb hydrocarbons is becoming characteristic of an increasing number of soil strains of A. resinae. The authors have studied the growth capacity of seven strains of A. resinae isolated from various aviation fuel samples and seven strains isolated from different geographical locations and substrates: soil, air, wood, and rooms. Among the studied strains of A. resinae were both those able to develop due to aviation fuel hydrocarbons and those without this ability. At the same time, visual and quantitative methods for evaluating the growth rate and intensity of the studied fungi strains do not exclude each other and give comparable results. A. resinae strains isolated from fuel samples demonstrated much more active development compared to strains isolated from natural habitats. Five strains of A. resinae isolated from different geographical locations of fuel samples showed almost the same degree of development in the amount of biomass formed during one month.

冯·卡门 航空与航天时代的科学奇才

作者：   美   卡   门   Karman   V.   美   爱特生   Edson   L.     曹开成译   来源： 上海：上海科学技术出版社 年份： 1991 文献类型 ： 图书 关键词： 传记)   冯·卡门(学科:  

描述： 冯·卡门 航空与航天时代的科学奇才

冯·卡门 航空与航天时代的科学奇才

作者：   美   卡   门   Karman   V.   美   爱特生   Edson   L.     曹开成译   来源： 上海：上海科学技术出版社 年份： 1991 文献类型 ： 图书 关键词： 传记)   冯·卡门(学科:  

描述： 冯·卡门 航空与航天时代的科学奇才

Modern Phenolic Adhesives for Aviation and Engineering. Part 2. Chemical Modification

作者： Aronovich   D.   A.     Petrova   A.   P.   来源： Polymer Science, Series D 年份： 2023 文献类型 ： 期刊 关键词： resins   adhesives   modification   phenolic  

描述： The review addresses methods for modification of phenolic resins via introducing reactive compounds into synthesis and the reactions of hydroxyl phenolic and methylol groups which allow the preparation of adhesives with improved performance characteristics.

Modern Phenolic Adhesives for Aviation and Engineering. Part 2. Chemical Modification

作者： Aronovich   D.   A.     Petrova   A.   P.   来源： Polymer Science, Series D 年份： 2023 文献类型 ： 期刊 关键词： resins   adhesives   modification   phenolic  

描述： The review addresses methods for modification of phenolic resins via introducing reactive compounds into synthesis and the reactions of hydroxyl phenolic and methylol groups which allow the preparation of adhesives with improved performance characteristics.

航空维修管理

作者：   美   Harry   A.   Kinnison   李建瑂   李真译   来源： 北京：航空工业出版社 年份： 2007 文献类型 ： 图书 关键词： 航空器(学科:   维修)   航空器  

描述： 航空科技图书出版专项资助:本书从热力学熵值原理入手，深刻地阐明了航空维修的必要性，并以最新的航空维修管理概念，在宏观上全面论述了维修、工程和管理三大要素的关系。

航空维修管理

作者：   美   Harry   A.   Kinnison   李建瑂   李真译   来源： 北京：航空工业出版社 年份： 2007 文献类型 ： 图书 关键词： 航空器(学科:   维修)   航空器  

描述： 航空科技图书出版专项资助:本书从热力学熵值原理入手，深刻地阐明了航空维修的必要性，并以最新的航空维修管理概念，在宏观上全面论述了维修、工程和管理三大要素的关系。

航空轮胎的准静态粘弹性有限元模型

作者： 李汉堂   Arthur   R.   Johnson   John   A.   Tanner   Angela   J.   Mason   来源： 现代橡胶技术 年份： 2016 文献类型 ： 期刊 关键词： 航空轮胎　　准静态粘弹性　　负荷　　有限元模型  

描述： 为了计算粘弹性应力,修正了弹性大位移壳体混合有限元。在单元应变节点采用了内应变变量,并用内应变变量来建立粘性材料模型。一阶常微分方程建立了内应变变量与在应力节点的相应弹性应变的关系式。采用为弹性模量几分之一的粘性模量根据内应变变量可计算出粘弹性应力。在混合变分函数中包含有由于粘性应力而产生的能耗散。这样,可以获得非线性准静态粘弹性平衡公式。为了将粘性项列入公式中,对此前展开的有关非线性弹性平衡公式的泰勒展开式进行了修正。采用预示校正时间步进求解算法进行求解代数微分方程。用粘性壳体元素计算模拟了航空轮胎在与非摩擦表面接触时的梯级负载加载和卸载。

航空轮胎的准静态粘弹性有限元模型

作者： 李汉堂   Arthur   R.   Johnson   John   A.   Tanner   Angela   J.   Mason   来源： 现代橡胶技术 年份： 2016 文献类型 ： 期刊 关键词： 航空轮胎　　准静态粘弹性　　负荷　　有限元模型  

描述： 为了计算粘弹性应力,修正了弹性大位移壳体混合有限元。在单元应变节点采用了内应变变量,并用内应变变量来建立粘性材料模型。一阶常微分方程建立了内应变变量与在应力节点的相应弹性应变的关系式。采用为弹性模量几分之一的粘性模量根据内应变变量可计算出粘弹性应力。在混合变分函数中包含有由于粘性应力而产生的能耗散。这样,可以获得非线性准静态粘弹性平衡公式。为了将粘性项列入公式中,对此前展开的有关非线性弹性平衡公式的泰勒展开式进行了修正。采用预示校正时间步进求解算法进行求解代数微分方程。用粘性壳体元素计算模拟了航空轮胎在与非摩擦表面接触时的梯级负载加载和卸载。