This work reports the production and characteristics of silver nanoparticles by electrolysis method at different voltages time with respect to their soluble concentration. research is an experimental research. The sample was result a solution method. purpose this determine effect voltage on concentration nanoparticles, characterization using UV-Vis, AAS PSA. In there are two stages, namely stag...

acacia nilotica (thorn mimosa) is used locally for various medicinal purposes by traditionalists and herbalists in northeastern nigeria. plants products have been used since ancient times in the management of various conditions. the bark of a. nilotica has been reported to be used traditionally to manage diabetes, dysentery, leprosy, ulcers, cancers, tumor of the eye, ear and testicles, indurat...

Lead (Pb) is one of the heavy metals that causes pollution in ecosystems, metal Pb can cause disturbances to humans, including plants and animals. In Indonesia, especially Surabaya, Tabebuya grows on main roads as a shade tree well an ornamental plant; This plant be exposed metal, among others, from motor vehicle exhaust. study aimed determine levels chlorophyll leaves. leaves were measured usi...

We built a transient absorption spectrophotometer that can determine transient absorption spectral changes that occur at times as fast as approximately 200 ns and as slow as a minute. The transient absorption can be induced by a temperature-jump (T-jump) or by optical pumping from the deep ultraviolet (UV) to the infrared (IR) by use of single ns Nd:YAG laser pulses. Our use of a fiber-optic sp...

IN CONVENTIONAL atomic absorption spectrophotometry a solution of the sample is introduced into the flame as an aerosol by means of a nebulizer. However, commercial nebulizers are only about 5 efficient in forming fine droplets suitable for atomization by the flame ( I ) . Furthermore, a solution aspirated at a usual rate of 3-5 ml/min for about 10 sec produces a concentration signal extending ...

The control of Na(+) and Cl(-) uptake from soils, and the partitioning of these ions within plants, is an essential component of salinity tolerance. Genetic variation in the ability of roots to exclude Na(+) and Cl(-) from the transpiration stream flowing to the shoot has been associated with salinity tolerance in many species. The maintenance of a high uptake of K(+) is also essential, so meas...