ordinary ordinary ordinary Price of about 300 or so, the
hot air gun is mainly temperature instability, high and low, air volume and
instability. The scale of the air pressure gun just adjust the size of its
power, so the temperature of raw slowly when the phone is switched on, for
several minutes, and then temperature soared, a little attention will burn out.
Such as amplifiers, CPU, circuit boards, etc. It also has a temperature
detection, it seems only to high temperature protection, adjust the temperature
and unreal. Suggest you not to save money, and often compensate machine.
standard standard standard About after the price, this kind of heat gun
calibration is used to adjust the temperature of the real, warming faster when
the phone is switched on, a few seconds can be reached, and the temperature will
not increase, in close range adjustment, air volume is more stable, applicable
repair mobile phone, I use the air pressure gun is very good, such as: 3508 CPU
won't burn out in more than 90%. Digital temperature display type The basic
performance with those of the second
heat gun, hot air gun ZHE JIANG ULITE TOOLS MANUFACTURE CO.,LTD , http://www.ulitepowertool.com
Genetic Technology Explores New Pathways for the Control of Tobacco Fungal Diseases
The project “To identify and apply the resistance of tobacco to chitinase gene to fungal diseases†undertaken by the Tobacco Research Institute of China Academy of Agricultural Sciences recently passed the results appraisal organized by the State Tobacco Monopoly Administration. It is reported that the chitinase gene derived from baculovirus was constructed on an expression vector for the first time and introduced into tobacco. PCR and Western Blot methods were used to detect the transgenic chitinase gene. The results of the enzyme activity assay showed that the exogenous chitinase gene was expressed in tobacco and produced biological activity, and the chitinase activity of the transgenic line was higher than that of the non-transgenic parent. This project studied in detail the resistance of transgenic lines to tobacco brown spot disease and anthrax, and obtained a number of resistant tobacco cultivar strains carrying the chitinase gene; disease resistant transgenic lines via PCR and Western Blot. The test showed genetic stability. This is the first application of the gene in cultivated crops, which has explored a new way for the prevention and control of tobacco fungal diseases. In view of the need for international tobacco technology barriers and China’s foreign trade in tobacco, the researchers also studied the methods for identification of transgenic tobacco, and proposed that semi-nested PCR is a rapid and sensitive method for the detection of chitinase transgenic tobacco plants. Its new method of modulating the tobacco leaves. In addition, the localization of chitinase gene expression in tobacco tissues was also studied by confocal laser scanning microscopy. The results showed that the exogenous chitinase gene is mainly expressed in vascular bundles and accumulated in chloroplasts. The researchers also conducted a preliminary discussion on genetic drift in transgenic tobacco. Experts believe that this study is designed with reasonable results and reliable results. It is systematic and obviously innovative. As a high-tech reserve for tobacco germplasm improvement, it has potential economic importance for the future development of tobacco production in China, especially for genetically modified tobacco and products. Identification has important business value.