background: bio aerosols include airborne micro-organisms such as bacteria, fungi, viruses, etc and their products. exposure to a bio aerosol is linked with a broad spectrum of health problems, including infectious diseases, acute toxic effects, allergies, and cancer. the aim of this study was to evaluate the quality and quantity of bio aerosols found in the air of different wards in valiasr ho...

We report on the NEMA-NU2-2012 performance of a hypothetical Monte Carlo (MC) model, Ex-PET, Siemens Biograph Vision positron emission tomography (PET)/CT (Bio-Vis) with sparse detector module rings and extended axial field view (AFOV). MC simulations were performed interleaved 32-mm gaps, equivalent to dimension each module, yielding an AFOV 48.0 cm (Bio-Vis has 25.6-cm AFOV). 3D-PET acquisiti...

In machine learning and statistics, feature selection is the technique of selecting a subset of relevant features for building robust learning models. In this paper we propose a bio-inspired BAT algorithm as feature selection method to find the optimal features from the KDDCup’99 intrusion detection dataset obtained from UCI Machine Learning repository. Neural Networks (NN) as a classifier coll...

The use of contour strips of perennial vegetation with bio-fuel potential can improve surface water quality by reducing NO3-N and sediment outflow from cropland to surface water-bodies. It also has economic benefits of producing ethanol. In this study, The Soil and Water Assessment Tool (SWAT) model was applied to a watershed in Iowa, USA to examine the effectiveness of contour strips of switch...

0022-2860/$ see front matter Published by Elsevier doi:10.1016/j.molstruc.2010.01.048 q Mention of trade names or commercial products purpose of providing specific information and does n endorsement by the US Department of Agriculture. * Tel.: +1 215 233 6680; fax: +1 215 233 6795. E-mail address: [email protected] Investigations of keratins extracted from wool by reduction hydrolysis ...

b a ckground:   eco-faunistic  studies  are  inevitable  step  in  environmental  researches.  aquatic  organisms  like caddisflies are known as biological indicators for water quality assessment and water resource management. they have special role for energy flow in the freshwater habitats as food web and food chain among aquatic creatures. methods: in addition to an extensive literature revi...

phytoplanktons are the first bio- indicators of pollution in aquatic ecosystems. phytoplankton assemblage and aquatic ecosystems are always influenced by environmental factors therefore these environmental changes and threats must be understood in any ecosystem. phytoplankton are inexpensive and readily available bio- indicators. in the present study, phytoplankton were used to study the sefid ...

This study aims at evaluating the biocompatibility of titanium surfaces modified according two different ways: (i) deposition of a bio-inert, thin film of rutile TiO(2) by chemical vapour deposition (MOCVD), and (ii) biochemical treatment with collagen gel, in order to obtain a bio-interactive coating. Behind the comparison is the idea that either the bio-inert or the bio-active coating has spe...

In this work the Origanum vulgare leaf extract was used to green synthesis of Ag nanoparticles (NPs) supported on Hazelnut shell as an environmentally benign support. The Ag NPs/Hazelnut shell as an effective catalyst was prepared through reduction of Ag+ ions using Origanum vulgare leaf extract as the reducing and capping agent and Ag NPs immobilization on Hazelnut shell surface in ...

The development of natural-based adhesives is a key aspect in reducing the consumption fossil resources, adapting to legislation on use formaldehyde and ensuring sustainability wood panel industry. This study focuses five alternatives for tannin-based (tannin-paraformaldehyde, tannin-glyoxal, tannin-hexamine, tannin non-isocyanate polyurethane (NIPU) with ammonium hydroxide NIPU HDMA bio-adhesi...