Generalized Casoratian condition and Casoratian solutions of the Toda lattice are given in terms of its bilinear Bgcklund transformation. By choosing suitable Casoratian entries and parameter in the bilinear Bgcklund ...Generalized Casoratian condition and Casoratian solutions of the Toda lattice are given in terms of its bilinear Bgcklund transformation. By choosing suitable Casoratian entries and parameter in the bilinear Bgcklund transformation, we can give transformations among many kinds of solutions.展开更多
This paper introduces the discovery,composition and structure of oxalate oxidase,as well as illustrates the biological functions of this enzyme.With a comprehensive introduction upon previous researches upon gene clon...This paper introduces the discovery,composition and structure of oxalate oxidase,as well as illustrates the biological functions of this enzyme.With a comprehensive introduction upon previous researches upon gene cloning and heredity transformation of this enzyme,it indicates that heredity transformation can increase the content of oxalate oxidase within the plants and also enhance their resistance.The paper also points out the problems such as lack of gene resources and difficulty in the transformation of heterologous genes,and the focus in later researches should be laid upon the exploration of plant resources relative to this enzyme and selection of resistant species.展开更多
Along with the more and more attention from people to the environmental problems, people constantly attach higher and higher importance to the environmental accounting. In this paper, the disadvantages of environmenta...Along with the more and more attention from people to the environmental problems, people constantly attach higher and higher importance to the environmental accounting. In this paper, the disadvantages of environmental accounting system are analyzed, and also corresponding measures for transforming the disadvantages are proposed.展开更多
In the process of folk custom development, ecological transformation is a normal phenomenon.This article will study the minority folk dance ecology transformation based on the perspective of social historical developm...In the process of folk custom development, ecological transformation is a normal phenomenon.This article will study the minority folk dance ecology transformation based on the perspective of social historical development.The author will discuss the native pattern and variable pattern for the development of the minority folk dance and analyze the positive influence and negative influence on minority dance at this stage. To address the problems in the development, the author puts forward some countermeasures and feasible suggestions for its future development展开更多
With the increasing use of PPCPs （pharmaceuticals and personal care products）, the impact caused by the accumulation of PPCPs on the environment has become increasingly serious and has attracted considerable attenti...With the increasing use of PPCPs （pharmaceuticals and personal care products）, the impact caused by the accumulation of PPCPs on the environment has become increasingly serious and has attracted considerable attention. In the last 10 years, major studies on PPCPs have focused on the sources and analytical testing of concentrations in the environment. Afterward, studies have shifted to the transfer and transformation of PCPPs in the environment and to the environmental risk assessment of PPCPs. Studies on PPCPs in the underground environment have mainly focused on their adsorption, desorption, transfer, and transformation in the aeration and saturation zones. The main methods applied in these studies include indoor simulation experiments and outdoor sampling and testing. These studies have mainly considered one dimension, and most of them have concentrated only on the aeration or saturation zone. Therefore, the main developing directions of studies on PPCPs are the comprehensive study of the transfer and transform process from source to sink in the underground environment and the establishment of an effective and efficient PPCP detection system,展开更多
Soybean transformation by ovary-drip was improved by optimizing the length of the transformation pathway by cutting the styles. These modifications facilitated soybean transformation manipulation and improved transfor...Soybean transformation by ovary-drip was improved by optimizing the length of the transformation pathway by cutting the styles. These modifications facilitated soybean transformation manipulation and improved transformation reproducibility and efficiency. Using a linear minimal gus gene cassette as the foreign DNA, a maximum transformation frequency of 11% was obtained in flowers of the soybean cultivar ‘Liaodou 14’ with their styles mostly removed, whereas removal of only the stigma, partial style cutting and partial ovary cutting gave transformation frequencies of 0%, 1%, and 2%, respectively. An average transformation frequency of 8.2% was obtained when 619 flowers from three soybean cultivars (‘Liaodou 14’, ‘Liaodou 13’, and ‘Tiefeng 29’) were transformed by this optimized method. Southern blotting analysis showed that the gus reporter gene (encoding β-glucuronidase) was stably inherited with a simple pattern. Reverse transcription-polymerase chain reaction (RT-PCR) and GUS staining confirmed the expression of the gus gene in transgenic plants.展开更多
基金Supported by National Natural Science Foundation of China under Grant No. 10671121Shanghai Leading Academic Discipline Project under Grant No. J50101
文摘Generalized Casoratian condition and Casoratian solutions of the Toda lattice are given in terms of its bilinear Bgcklund transformation. By choosing suitable Casoratian entries and parameter in the bilinear Bgcklund transformation, we can give transformations among many kinds of solutions.
基金Supported by Jilin Province Post-doctoral Project"Exploration of Quality Bean Sclerotiniose-tolerant Seeds and Genetic Resources"(00206)
文摘This paper introduces the discovery,composition and structure of oxalate oxidase,as well as illustrates the biological functions of this enzyme.With a comprehensive introduction upon previous researches upon gene cloning and heredity transformation of this enzyme,it indicates that heredity transformation can increase the content of oxalate oxidase within the plants and also enhance their resistance.The paper also points out the problems such as lack of gene resources and difficulty in the transformation of heterologous genes,and the focus in later researches should be laid upon the exploration of plant resources relative to this enzyme and selection of resistant species.
文摘Along with the more and more attention from people to the environmental problems, people constantly attach higher and higher importance to the environmental accounting. In this paper, the disadvantages of environmental accounting system are analyzed, and also corresponding measures for transforming the disadvantages are proposed.
文摘In the process of folk custom development, ecological transformation is a normal phenomenon.This article will study the minority folk dance ecology transformation based on the perspective of social historical development.The author will discuss the native pattern and variable pattern for the development of the minority folk dance and analyze the positive influence and negative influence on minority dance at this stage. To address the problems in the development, the author puts forward some countermeasures and feasible suggestions for its future development
文摘With the increasing use of PPCPs （pharmaceuticals and personal care products）, the impact caused by the accumulation of PPCPs on the environment has become increasingly serious and has attracted considerable attention. In the last 10 years, major studies on PPCPs have focused on the sources and analytical testing of concentrations in the environment. Afterward, studies have shifted to the transfer and transformation of PCPPs in the environment and to the environmental risk assessment of PPCPs. Studies on PPCPs in the underground environment have mainly focused on their adsorption, desorption, transfer, and transformation in the aeration and saturation zones. The main methods applied in these studies include indoor simulation experiments and outdoor sampling and testing. These studies have mainly considered one dimension, and most of them have concentrated only on the aeration or saturation zone. Therefore, the main developing directions of studies on PPCPs are the comprehensive study of the transfer and transform process from source to sink in the underground environment and the establishment of an effective and efficient PPCP detection system,
基金Project (No. JY03-B-18-02) supported by the National R & D Project of Transgenic Crops of Ministry of Science and Technology of China
文摘Soybean transformation by ovary-drip was improved by optimizing the length of the transformation pathway by cutting the styles. These modifications facilitated soybean transformation manipulation and improved transformation reproducibility and efficiency. Using a linear minimal gus gene cassette as the foreign DNA, a maximum transformation frequency of 11% was obtained in flowers of the soybean cultivar ‘Liaodou 14’ with their styles mostly removed, whereas removal of only the stigma, partial style cutting and partial ovary cutting gave transformation frequencies of 0%, 1%, and 2%, respectively. An average transformation frequency of 8.2% was obtained when 619 flowers from three soybean cultivars (‘Liaodou 14’, ‘Liaodou 13’, and ‘Tiefeng 29’) were transformed by this optimized method. Southern blotting analysis showed that the gus reporter gene (encoding β-glucuronidase) was stably inherited with a simple pattern. Reverse transcription-polymerase chain reaction (RT-PCR) and GUS staining confirmed the expression of the gus gene in transgenic plants.
