ABSTRACT Heavy metals constitute the largest part of air pollution. metals, concentration which in environment is constantly increasing and can remain intact nature for a long time, are great threat to living things. In addition, due fact that it causes bioaccumulation structure things, detection heavy metal very important. However, things areas where traffic exposed exhaust fumes, this signifi...

The concentrations of sugars, starch, nutrients and some heavy metals were examined during the growing season in four tree species (Ailanthus glandulosa DESF., Carpinus betulus L., Tilia argentea DESF. and Quercus cerris L.), growing in natural and planted stands in a region with considerable industrial emissions and in an unpolluted area. Trees in the polluted regions had lower concentrations ...

Several lymphoma T cell lines differ in membrane superficial markers and do not respond to the same drugs and compounds. Tilia x viridis (Bayer) Simonk nothosubspecie moltkei (Dippel) Xifreda is a plant widely distributed in Argentina. The aim of this work was to study comparatively the effects of dichloromethane extract and isolated compounds on BW 5147 and on another T lymphoma cell line EL-4...

This paper provides taxonomic and biological data on one new and one newly recorded species of Coptotriche Walsingham and one new and one newly recorded species of Tischeria Zeller from Japan. Coptotriche symplocosella Kobayashi & Hirowatari, sp. n. (host Symplocos lucida, Symplocaceae), and Tischeria kumatai Sato, Kobayashi & Hirowatari, sp. n. (host Tilia japonica, Malvaceae) are described. T...

In cold extracts of senescent leaves of the Lime tree (Tilia cordata), two colorless nonfluorescent chlorophyll catabolites (NCCs) were identified, named Tc-NCC-1 and Tc-NCC-2, as well as a polar yellow chlorophyll catabolite (YCC), named Tc-YCC. The constitution of the two NCCs was determined by spectroscopic means. In addition, a tentative structure was derived for Tc-YCC. The three chlorophy...

Once, Europe was one large natural area, across which species of animals and plants were able freely to move and disperse. Today, a satellite image of Europe looks like a Persian carpet cut into millions of small rectangular pieces, each fashioned by the plough and the spade over thousands of years of cultivation. The consequence of this change is that species have disappeared. For example, ani...

The use of Wireless Mesh Networks (WMNs) is considered an effective solution to provide Internet connectivity to large areas. This paper assumes that WMNs are formed by nodes with a single radio interface and addresses the problem of improving the WMN capacity by using multiple channels. We propose an architecture for a centralized Channel Assignment Subsystem (CAS) in single-radio WMNs. CAS ex...

Three pure cultures of Xylaria polymorpha were isolated from fruiting bodies at yearly intervals over two years and maintained on 2% malt agar plates at room temperature. Immediately after isolation of the third culture, the cultures were inoculated onto sugar maple (Acer saccharum), aspen (Populus tremuloides), birch (Betula alleghaniensis), and basswood (Tilia americana) 14 mm cubes and incub...