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Showing 1 to 20 of 45 for “"BOUND WATER"”.
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Coagulation study of a bound water bulked sludge
… added to a sludge which has bulked due to a high bound water content. The effect of coagulant addition upon microbial metabolism was studied using dissolved oxygen uptake. Coagulant dosages ranging from 200 mg/l to 700 mg/l were added to 1000 mg/1 and 2000 mg/l mixed liquor volatile suspended …
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The role of bound water content in defining sludge dewatering characteristics
Several available methods of measuring sludge bound water content in the laboratory were examined. The effect of polymer conditioning on the bound water content of biological sludge samples was measured using the dilatometric method. The effects of mechanical dewatering on the bound water content …
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Bound Water Defined and Determined at Constant Temperature by Wide-Line Nmr
Made available in DSpace on 2014-12-10T22:38:14Z (GMT). No. of bitstreams: 1 7105232.pdf: 4957788 bytes, checksum: bd1fe66a2a96a22dbf78cef62f1ba20c (MD5) Previous issue date: 1970
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Effect of Digestion Processes on Dewatering and Bound Water Content of Sludge
… portion of the operational costs of a wastewater treatment plant, contributing up to 50% of the total expenses in certain instances. Sludge dewatering and drying therefore become necessary not only from the operational perspective, but also from the economical viewpoint. The J-Vap process …
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Using simulation to estimate probability density functions of bound water molecules with DSI
In order to explore the physical basis by which high resolution diffusion imaging derives information about fiber alignment and diameter, we simulated a model diffusion experiment employing a random walk paradigm. A simulation of a model diffusion spectrum imaging experiment was written in Java in …
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Impact of polymer type, dosage, and mixing regime and sludge type on sludge floc properties
… mixing rate, and solution ionic strength on bound water content of sludge flocs. Data determined to evaluate the extent of dewatering included: percent dry solids, bulk density, bound water content (determined by dilatometric method), floc density (determined by isopycnic centrifugation), and …
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Advances in oxygen-17 NMR for biological structure determination
… demonstrated a distinct chemical shift range for bound water in crystalline amino acids and dipeptides and identified discordance between experimental and calculated EFG parameters. This difference was further studied via variable temperature ¹⁷O NMR experiments on barium chlorate monohydrate that …
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The Development of Gelatin Based Tissue Adhesives for Use in Soft Tissue Biomedical Applications
… formulations with altered weight content of water and glyoxal (a dialdehyde) were utilized. The adhesive formulations were characterized by pH and gelation time in situ, and absorption/desorption of water in the formed resin. Thermal analysis, mechanical testing, and lap shear adhesive bond …
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Constraining the Hydration State of the Phyllosilicate Deposits of Eastern Valles Marineris Mars
A study has found that the bound water of clay deposits on Mars render radar observations ineffective, as the water presence absorbs the radar signal beyond detection (Stillman & Grimm 2011). However, at Aurorae Planum, basal reflections are still observed, despite the presence of widespread clay …
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The Role of Water-Adenine Complexes in Protein-Dna Interactions
… studies to investigate the role of specific water-mediated interactions in protein-DNA complexes. The analogues create a ""bound"" water molecule that will be distinct from the water molecules of bulk solvent."
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Transport and Structure in Fuel Cell Proton Exchange Membranes
… compared. Species transport (protons, methanol, water) in hydrated membranes was found to correspond with the water-self diffusion coefficient as measured by pulsed field gradient nuclear magnetic resonance (PFG NMR), which was used as a measure of the state of absorbed water in the membrane. …
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ΔΙΗΛΕΚΤΡΙΚΗ ΜΕΛΕΤΗ ΤΗΣ ΚΑΤΑΣΤΑΣΗΣ ΤΟΥ ΝΕΡΟΥ ΣΕ ΥΔΑΤΙΚΑ ΔΙΑΛΥΜΑΤΑ ΚΑΙ ΥΔΑΤΩΜΕΝΑ ΣΤΕΡΕΑ ΔΕΙΓΜΑΤΑ ΜΟΝΟ-ΚΑΙ ΔΙ-ΣΑΚΧΑΡΙΤΩΝ
… THE DIM WAS TO GAIN INFORMATION ON THE STATE OF WATER, ON THE HYDRATION MECHANISM AND THE NATURE OF THE HYDRATION POSITIONS. A SYSTEMATIC STUDY OF THE L.T REGION (100- 160K) SHOWED THAT SUGAR SOLUTIONS CAN BE DIVIDED INTO TWO CATEGORIES. SOLUTIONS OF GLUCOSE, GALACTOSE AND MANNOSE HAVE SIMILAR …
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The Effect of Clay Content and Iron Oxyhydroxide Coatings on the Dielectric Properties of Quartz Sand
… that affect the ratio and properties of bound and bulk water. This study tested the hypothesis that the dielectric responses of porous materials are mineral-specific through differences in surface area and chemistry. An experimental design was developed to test the dielectric behavior of …
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Water in Protein Cavities: Free Energy, Entropy, Enthalpy, and its Influences on Protein Structure and Flexibility
… DNA gyrase are illustrative of the importance of bound water to binding thermodynamics. Mutants resistantto novobiocin as well as those with a decreased affinity for novobiocin over clorobiocinboth involve a less favorable entropy of binding, which more than compensates for amore favorable …
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The Characterization of Dried Aluminum Hydroxide Gel Suspensions: Particle Size Analysis and Thermal Analysis
… in various dispersion media eg. Purified Water USP, 0.01%, 0.03% and 0.05% PEG 1000 solutions. The particle size of the suspensions was determined using settling behavior of the sediment. The rate of fall of the interface was plotted and the straight line portion of the graphs was used to …
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Degradation of atrazine utilizing triazine hydrolase (TrzN) from Arthrobacter aurescens TC1
… formed between the Thr325 oxygen and the Zn(II)-bound water moiety which likely stabilizes the water moiety for nucleophilic attack. The mechanism functions based on a two proton transfer system. First the His274 residue removes a proton form the Zn(II)-bound water moiety. The proton is shuttle …
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Characterization of water distribution in sludges
Knowledge of water distribution in sludges is important in developing a better understanding of the mechanisms by which various fractions of water are bound to the sludge matrix as well as the extent to which sludges may be dewatered in an economic manner. Various models have been proposed in the …
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Molecular Dynamics Simulation Studies on Interfacial Dynamics of Proteins
Clusters of water molecules embedded in proteins or at the interface between globules mediate protein dynamics, allostery and charge transfer. Confined clusters of water molecules exhibit dynamics distinct from dynamics of water in the bulk or in the hydration layer around biomolecules. Here, we …
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Nuclear magnetic resonance studies of corn zeins and other byproducts of corn wet milling: Dynamic and structural basis of functionality
… the hydration properties and mobility of ""bound"" water in corn zein solutions and samples of corn gluten meal (CGM) and corn germ meal (CGRM). Multinuclear relaxation measurements using $\sp1$H, $\sp2$H and $\sp{17}$O nuclei indicated that $\sp{17}$O is the nucleus of choice for evaluating …
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