The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
More than ten unconnected upward positive leaders initiated from high structures in response to natural downward-moving negative leaders are analyzed. These leaders are observed by using high-speed cameras with sampling rates at the order of 104 fps (frames per second). The propagation velocity, channel width of the unconnected upward leader and the distances between it and strike point are presented...
In order to research the pollution and the correlation of the heavy mental in the huai yam and the Soil of wenxian, we collected 9 huai yam samples, 9 huai yam soil samples and 1 wheat soil sample in the areas, the content of Cu, Cr, Pb, Zn, Ni have been done. The results show that: in 9 huai yam samples, the contamitations of the 5 heavy mental elements are not beyond the standard limits, but the...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.