Sophisticated separation without membrane technology is unthinkable in modern chemical industries using process water and discharging effluents contaminated with various solid liquid pollutants, but Bangladesh far behind the advanced world terms of manufacturing uses. This work initiates research field successfully develops membranes from technical grade poly(vinyl chloride) (PVC) applicable wastewater treatment. Porous structure observed by Scanning Electron Microscope looks somewhat finger...

Abstract In chemical manufactures, the corrosion inhibitors were added in order to reduce of mild steel. Chemical molecules are often used on steel surfaces as portion latest finishing steps before painting and/or storage. Here, this work elucidated utilization an isatin derivative, namely, 3-((3-acetylphenyl)imino)indolin-2-one synergistic with zinc oxide nanoparticles for improving impedance (MS) against 1.0 M hydrochloric acid using weight loss method and scanning electron microscopy...

Abstract Data networks and new mobile (4G 5G) deploy packet switching in their core networks. Due to this architecture VoIP protocols has a wide deployment these environments. capacity quality must be considered during implementations. The aim of QoS mechanisms is satisfy voice traffic requirements; deployed by using many tools like congestion management utilities, avoidance link fragmentation tools. Each tool an impact on performance. Queuing very important the system. Certain routers data...

IEEE 802.11x Wireless Local-Area-Network (WLAN) considered a powerful solution for the last mile wireless broadband(BB) access. WLAN becomes important element in 4G and 5G mobile networks because it can provide services to users areas not covered by eNBs. However, 802.11 legacy protocol doesn’t support delay-sensitive like VoIP adopts best-effort method. In 2001 802.11e standard was proposed deploy QoS with new access techniques introduction. There are many parameters related MAC layer which...

Well characterized, an Egyptian coal sample (EM-87) has been carbonized in Argon atmosphere of pressure 105 Pa at different temperatures from 700–1000 K. The analysis the Mössbauer spectra collected room temperature for produced semi-cokes, showed that pyrite FeS2 was starting to be transformed pyrrhotite Fe1-xS 700 This transformation found increased when pyrolysis increased.

Abstract Three chars from lignite (Se) sub bituminous (AA6), (BCA) Spanish coals produced at 673 K, 773 and 873 K were analyzed by Mossbauer spectroscopy room temperature, 80 except BCA char its analysis was extended down to 10 K. Least square fit for the spectra of Se showed that, jarosite/Fe3+ hydrolyzed into rozenite/Fe2+ Pyrite reduced troilite (FeS) Both jarosite very broad doublet observed T = The hyperfine parameters this phase gave close values microcrystalline iron in either Fe (II)...

In this paper, graphene nanosheets were used to detect ammonia gas (NH[Formula: see text]. Graphene dispersion was drop cast on special ceramic substrate fabricate the sensor. The measurements based measuring resistance before and after exposure. A considerable increase in exposure found. Resistance increased from 1.4[Formula: text]k[Formula: text] 1.8[Formula: just less than 3[Formula: text]s. Recovery time is also determined at room temperature it 2[Formula: text]h. delay recovery ascribed...

Abstract Organic-inorganic perovskite-based solar cell fascinated researchers around the world with their immense interest. Since 2009, intensive work on photovoltaic perovskite systems reached efficiencies over 20% relative to silicon-based cells a current efficiency of approximately 17%. The research paper presents suitable choice materials such as hole transport materials, type material, electron layer among others. A device is then built using chosen which are investigated through...

In this paper, nanostructured silicon carbide (SiC) thin films are deposited onto glass substrate using pulsed laser deposition technique. Electrical and optical characterizations such as conductivity, resistivity, transmission, Seeback effect, absorption, absorption coefficient, energy band gap, extinction coefficient a function of photon energy, the effect thickness on transmission carried out to characterize prepared samples. Results showed that SiC film is an n-type semiconductor with...

Phthalocyanine polymers, either metal-free or containing the transition elements Cu, Co, Cr and Fe, respectively, have been prepared from pyromellitic dianhydride by conventional urea fusion method. The polymers were characterized their structures confirmed using elemental analysis, spectrophotometric measurements as IR, UV-VIS, XRD, thermal gravimetric analysis (TGA). calculated values of activation energy indicate semiconducting behavior well Cu Fe phthalocyanine within temperature range...

In the present paper, nanostructure tin oxide (SnO2) thin films on Si P-type substrates heterojunction solar cell has been made by using a pulsed 532 nm Nd:YAG laser. Deposition of is achieved at 400 °C substrate temperatures. The X-ray diffraction (XRD) results show that deposited are crystalline with tetragonal rutile SnO2 structure. morphology were characterized scanning electron microscope (SEM) and atomic force (AFM), grain size value (30–50) rms roughness values (2.8 nm) for 400ºC....

A series of oil shale samples selected from Abu Gradig field (AG-1) in the Egyptian Western Desert have been studied by Mossbauer spectroscopy and Fourier transform infrared spectroscopy. Eleven were collected Baharyia formation at different depths, starting 10,290 feet to 11,290 feet. The carbon, hydrogen, nitrogen, sulfur contents determined using a Carlo Erba CHNS-OEA1108 elemental analyzer. spectra performed 80 K with conventional-type mode spectrometer. From computer analysis these...