A preliminary model estimating soil specific resistance to ploughing

Abstract Midohm is a copper-nickel, heat resistant alloy having a maximum operating temperature of 400 deg F. It is normally used for resistor and potentiometer applications where low specific resistance is required. This datasheet provides information on composition, physical properties, and tensile properties. Filing Code: Cu-117. Producer or source: Driver-Harris Company.

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Faculty Opinions recommendation of Antiretroviral medication adherence and class- specific resistance in a large prospective clinical trial.

Faculty Opinions – Post-Publication Peer Review of the Biomedical Literature ◽

10.3410/f.3057960.2739058 ◽

2010 ◽

Author(s):

Caroline Sabin

Keyword(s):

Clinical Trial ◽

Medication Adherence ◽

Specific Resistance ◽

Prospective Clinical Trial ◽

Antiretroviral Medication ◽

Antiretroviral Medication Adherence

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Faculty Opinions recommendation of Rin4 causes hybrid necrosis and race-specific resistance in an interspecific lettuce hybrid.

Faculty Opinions – Post-Publication Peer Review of the Biomedical Literature ◽

10.3410/f.717963242.793465259 ◽

2012 ◽

Author(s):

John Willis

Keyword(s):

Specific Resistance ◽

Hybrid Necrosis

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Comparison of lime and alum as oily sludge conditioners

Water Science & Technology ◽

10.2166/wst.1997.0438 ◽

1997 ◽

Vol 36 (12) ◽

pp. 117-124 ◽

Cited By ~ 7

Author(s):

Tay Joo Hwa ◽

S. Jeyaseelan

Keyword(s):

Specific Resistance ◽

Sewage Treatment ◽

Sewage Treatment Plant ◽

Treatment Plant ◽

Oily Sludge ◽

Sludge Dewatering ◽

Capillary Suction ◽

Sludge Cake ◽

Solids Content ◽

Optimum Chemical

Chemical conditioning improves sludge dewatering. Choice of chemical conditioners is very much dependent on the characteristics of the sludges and the type of dewatering devices. Lime, alum, ferric chloride and polyelectrolytes are commonly used chemical conditioners. Anaerobic digested sludge samples collected from a sewage treatment plant with different oil contents varying from 1.8% to 8.0% by weight have been examined in the laboratory to find out their specific resistance, capillary suction time and filter yield. Lime and alum were used separately as conditioners. Different dosages of conditioner varying from 2% to 12% by weight were used to determine the optimum chemical dosage for varying oil contents. Lime dosages of about 6% were found to yield favourable characteristics. Addition of alum decreases the specific resistances and capillary suction times of oily sludges rapidly up to 4% dosages. Alum dosages beyond 4% only increase the solids content in the sludge cake and increase the sludge volume to be handled. A correlation between CST and specific resistance to filtration was established. CST can be measured easily and quickly in the laboratories. Using the CST and the correlation a quick prediction on dewaterability can be established.

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Conditioning of oily sludges with municipal solid wastes incinerator fly ash

Water Science & Technology ◽

10.2166/wst.1997.0318 ◽

1997 ◽

Vol 35 (8) ◽

pp. 231-238 ◽

Cited By ~ 7

Author(s):

Tay Joo Hwa ◽

S. Jeyaseelan

Keyword(s):

Heavy Metals ◽

Fly Ash ◽

Specific Resistance ◽

Sewage Treatment ◽

Sewage Treatment Plant ◽

Treatment Plant ◽

Solid Wastes ◽

Municipal Solid Wastes ◽

Capillary Suction ◽

Optimum Dosage

Conditioning of sludges improves dewatering characteristics and reduces the quantity of sludge to be handled. Anaerobic digested sludge collected from a sewage treatment plant contained 1.8% to 8% oil. The increase of specific resistance and capillary suction time (CST) with increasing oil content observed in these samples indicates the interference of oil in dewatering. It has been found that addition of municipal solid wastes incinerator fly ash decreases the specific resistances and capillary suction times of oily sludges rapidly up to 3% dosage. Beyond 3% fly ash, the decrease is less significant and the solids content in the sludge cake increases. This optimum dosage remains the same for sludges with varying oil contents from 1.8% to 12%. The total suspended solids of filtrate decreases with fly ash dosage but the toxic concentrations of heavy metals increases considerably. However at the optimum dosage of 3%, concentrations of heavy metals are within the limits for discharging into the sewers. The correlations of CST with the dewatering characteristics such as specific resistance, filter yield and corrected filter yield are established. These correlations can be used to obtain a quick prediction on dewaterability.

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Ultrafiltration of silica sols

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc19890091 ◽

1989 ◽

Vol 54 (1) ◽

pp. 91-101 ◽

Cited By ~ 5

Author(s):

Milan Stakić ◽

Slobodan Milonjić ◽

Vladeta Pavasović ◽

Zoja Ilić

Keyword(s):

Particle Size ◽

Silica Particle ◽

Specific Resistance ◽

Membrane Surface ◽

Membrane Resistance ◽

Experimental Conditions ◽

Surface Unit ◽

Silica Sols ◽

Filtration Flux ◽

Batch Cell

Ultrafiltration of three laboratory made silica and two commercial silica sols was studied using Amicon YC membrane in a 200 ml capacity batch-cell. The effect of silica particle size, stirring conditions, pressure, pH and silica contents on ultrafiltration was investigated. The results obtained indicate that the smaller particles have, disregarding the stirring conditions, lower filtration flux. The differences observed in filtration flux are more pronounced in the conditions without stirring. The obtained value of the membrane resistance is independent of the conditions investigated (stirring, pressure, pH, silica contents and particle size). The values of the resistance of polarized solids, specific resistance, and the mass of gel per membrane surface unit were calculated for all experimental conditions.

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