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111 results for “precipitation”
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Research ArticleOpen accessIn the abstractStudies On Bioemulsifier Production by Bacillus licheniformis PTCC 1595Gholamreza D. Noudeh, Mohammad H. Moshafi, Payam Khazaeli, Farideh AkefSurfactants are amphipathic molecules which reduce surface and interfacial tensions and widely used in pharmaceutical, cosmetic, food and petroleum industries. Biosurfactants are the structurally diverse group of surface-active molecules synthesized by microorganisms. There are several advantages for biosurfactants in contrast with chemical surfactants, such as lower toxicity; higher biodegradability; better environmental compatibility; higher foaming; high selectivity and specific activity at … …American Journal of Pharmacology and Toxicology, Vol. 2, Issue 4 · 31 Dec 2007 · 7,282 accessesView PDFCite
Research ArticleOpen accessIn the abstractNucleation and Crystal Growth Rates of Struvite in DTM Type Crystallizer with a Jet-Pump of Descending Suspension Flow in a Mixing ChamberJoanna Koralewska, Krzysztof Piotrowski, Boguslawa Wierzbowska, Andrzej MatyniaThe kinetic data concerning reaction-crystallization of struvite from diluted water solutions of Mg2+, NH4+ and PO43- ions in a continuous DTM-type liquid jet-pump crystallizer with internal circulation of suspension are presented and discussed. The measurements were performed with the assumption of minimal value of unit power of a jet-pump’s feeding stream, providing thus a minimal level of internal circulation intensity. … …American Journal of Agricultural and Biological Sciences, Vol. 2, Issue 4 · 31 Dec 2007 · 7,957 accessesView PDFCite
Research ArticleOpen accessIn the abstractThermodynamic Profile of Some Heavy Metal Ions Adsorption Onto Biomaterial SurfacesMedhat A. ShakerThe adsorption of Co2+, Zn2+, Pb2+ and Hg2+ onto dried non-living biomass (NB) of different Pseudomonas strains has been investigated in detail. Maximum adsorption of these cations is achieved at optimum pH values from 3.5 to 4.5 to avoid hydrolysis, polymerization and precipitation of metal cations in the treatment solutions. The experimental data obtained at different temperatures were fitted to … …American Journal of Applied Sciences, Vol. 4, Issue 8 · 31 Aug 2007 · 6,877 accessesView PDFCite
Research ArticleOpen accessIn the abstractEffect of Temperature on the Performance of Limestone/Sandstone Filters Treating Landfill LeachateAbdel E. Ghaly, M.A. Kamal, R. CoteThe ability of limestone and limestone/sandstone filters to remove dissolved iron and manganese from landfill leachate under field conditions were investigated. The results showed that the precipitation of iron and manganese were affected by temperature and time. Most of iron was removed from solution within the first 10 min at 20°C while the removal of iron from solution took much … …American Journal of Environmental Sciences, Vol. 3, Issue 1 · 31 Mar 2007 · 7,109 accessesView PDFCite
Research ArticleOpen accessIn the abstractEcological Capability of Land Use Planning for Rural DevelopmentJ. Nouri, R. Sharifipour, A. A. BabaeiExecution of development and creation of appropriate points for rural development without considering ecological capability will result in the appearance of several environmental, economic and social problems. This research is done in an analysis approach frame of a system with the aim of choosing the most suitable location for rural development in Abadeh with an area of 22,000 km2. In … …OnLine Journal of Biological Sciences, Vol. 6, Issue 1 · 30 Jun 2006 · 6,840 accessesView PDFCite
Research ArticleOpen accessIn the abstractAssessment of Pulverised Fly Ash (PFA) as an Ameliorant of Lead Contaminated SoilsEdmond Gatima, Mwinyikione Mwinyihija, Ken KillhamFly Ash (FA) is obtained by electrostatic or mechanical precipitation of dust-like particles from the flue gases of furnace fired with coal or lignite at 1100 to 1400°C. About 95-99% of Fly Ash consists of oxides of Si, Al, Fe and Ca, about 0.5 to 3.5% consists of Na, P, K and S and the remainder is composed of trace … …American Journal of Environmental Sciences, Vol. 1, Issue 3 · 30 Sep 2005 · 7,014 accessesView PDFCite
Research ArticleOpen accessIn the abstractContribution of Advective and Non-advective Heat Fluxes to the Heat Budget of a Shallow LagoonRodríguez-Rodríguez MiguelThe heat budget in a shallow lagoon has been established from field measurements at a bihourly scale. Information on the main advective and non-advective heat fluxes were collected during year 2003 at Nueva lagoon (Almería, Southern Spain). Heat storage data was obtained from a thermistor chain located in the deepest part of the lagoon and meteorological information was acquired using … …American Journal of Environmental Sciences, Vol. 1, Issue 2 · 30 Jun 2005 · 6,491 accessesView PDFCite
Research ArticleOpen accessIn the abstractThe Role of Groundwater Vulnerability in Urban Development PlanningJ. Nouri, S. MalmasiGroundwater resources in most places of Iran are considered to be one of the important drinking water supplies for civilians. In city of Tehran, 25% of drinking water is being supplied from groundwater. This fact would enforce the requirement to protect and conserve groundwater resources in the city for its further development plan. Municipality of Tehran, District-22 has been designed … …American Journal of Environmental Sciences, Vol. 1, Issue 1 · 31 Mar 2005 · 6,974 accessesView PDFCite
Research ArticleOpen accessIn the abstractPurification of A Recombinant Thrombin-like Enzyme, Gloshedobin by Egg Yolk Antibody-Coupled AdsorbentsQing Yang, Xuyu Lei, Jianqiang Xu, Lijia AnThe gloshedobin, a snake venom thrombin-like enzyme was biosynthesized in the soluble form and purified by egg yolk antibody-coupled adsorbents from E. coli. As His-tag is not favored from the point of view of high-level and soluble expression, we herein constructed a recombinant gloshedobin without His-tag and developed a novel egg yolk antibody (IgY)-immunoaffinity chromatography for its purification in a … …American Journal of Biochemistry and Biotechnology, Vol. 1, Issue 1 · 31 Mar 2005 · 6,690 accessesView PDFCite
Research ArticleOpen accessIn the abstractEffects of Root Rot in Soybean Cultivars with Diverse Susceptibility to the Disease on Plant Physiology, Yield, Amino Acids and Mycotoxins Profile in Climatic Conditions of KazakhstanNurlan Kuldybayev, Yerlan Dutbayev, Bozena Lozowicka et al.Soybean is an important high-value crop but susceptible to soil-borne diseases. A field trial was conducted in Kazakhstan to evaluate the effects of soybean cultivars and Fusarium root rot severity on soybean crop physiology, chlorophyll fractions and amino acids profile. The highest yield was achieved in 2018 (up to 4 t ha-1) for K-9648 cultivar. The greatest root rot severity … …OnLine Journal of Biological Sciences, Vol. 21, Issue 4 · 27 Dec 2021 · 6,299 accessesView PDFCite