objective(s): in recent years, the biosynthesis of gold nanoparticles has been the focus of interest because of their emerging application in a number of areas such as biomedicine. in the present study we report the extracellular biosynthesis of gold nanoparticles (aunps) by using a positive bacterium named streptomyces fulvissimus isolate u from rice fields of guilan province, iran.materials a...

A green environmental friendly process for preparing monodispersed cuprous oxide nanoparticles is reported. In this process, cuprous oxide is prepared using Cu(OH)42- as precursor and glucose as reducing agency in the presence of dispersant under ultrasonic radiation. Spherical, welldispersed Cu2O nanoparticles were obtained with the average size of 200 nm or 1.5 μm, respectively, with or witho...

Information and communication technology has experienced a vast development and increased usage over the past few years. This development again yields to increasing energy consumption. In this paper we provide a research agenda that picks up this serious development and suggests first approaches how holistic energy efficiency could be introduced in enterprises without neglecting a company’s per...

urban green spaces are one of the most important services in modern cities and form a set of urban sustainable development factors which receive considerable attention from urban planners. this paper explains how land use can be optimally allocated to urban public green spaces. in this study, some of the factors influencing urban green spaces in a period from 1373 to 1384 were studied. moreover...

Although the membrane process is recognized as a green technology and is considered as a key player in the process intensification movement, it is not widely known that the fabrication of membrane itself generates significant amount of waste. With the growing membrane market, more efforts must be placed on improving the sustainability of membrane fabrication such as replacing toxic organic solv...