cathodic protection of steel in soil

Ngày tải lên: 15/03/2014, 23:22

... factors that influence corrosion of reinforcing steel in concrete, measures for protecting em- PROTECTION OF METALS IN CONCRETE AGAINST CORROSION 222R-3 bedded reinforcing steel in new construction, ... confidence if reinforcing steel corrosion activity in undamaged concrete is increasing with time or if the total area of reinforcing steel showing active potentials is increasing Such information ... and zinc131,134,135 have all been shown to be capable of delaying, and in some cases preventing, the corrosion of reinforcing steel in concrete, but only zinccoated (galvanized) reinforcing bars...

Ngày tải lên: 24/10/2014, 16:04

... was observed for surface soils having higher soil organic matter compared with subsurface soils, indicating that SMT mainly binds to soil organic matter in soils Addition of dissolved organic carbon ... using polyvinyl chloride (PVC) plastic pipe Soil cores were obtained by forcing the pipes into the soil with a geotechnical drill rig and carefully excavating the surrounding soil Distinct soil ... and soil aggregation in the first year Roots increase soil aggregation by exuding binding agents 32 and serving as a food source for microorganisms, thus increasing infiltration and decreasing...

Ngày tải lên: 13/11/2014, 09:16

... lysogenic interactions in soil using cultivable soil bacterial isolates, while in Chapter 5, induction assays are developed to determine the frequency of inducible lysogeny within natural soil bacterial ... virulent soil phages which can remain infective, residing within the soil matrix for extended periods of time In fact, it has been shown that autochthonous virulent soil phages can retain their infectivity ... importance of lytic infections within the context of soil viral ecology Progress in soil viral ecology Andrews described the field of microbial ecology as a set of experiments in search of a theoretical...

Ngày tải lên: 13/11/2014, 10:53

... or model uncertainty) In the case of rainfall-induced landslides, the input parameters include soil properties and rainfall infiltration The primary sources of uncertainty in soil properties ... Illustration of change in soil matric suction (a) initial condition (b) during dry periods (c) during rainy days (after Phoon et al 2009) 2.1 Sources of uncertainty in analysis of rainfall-induced ... presence of fairly significant uncertainties For instance, uncertainties in the soil properties have been well recognized The sources of uncertainty include the inherent variability in the soil, ...

Ngày tải lên: 10/09/2015, 15:50

... 0.00015 in Clay Mud >10 < µm < 0.000039 in Colloid Mud 2.2.4 Soil Contamination Definition Soil contamination is the presence of hazardous chemicals mixed with soil or other changes in the natural soil ... amounts of initial material Other applications of PCR include DNA sequencing to determine unknown PCR-amplified sequences in which one of the amplification primers may be used in Sanger sequencing, ... effects ranging from skin rashes to death The pathway of attack can arise from intentional or unintentional direct consumption, improper application resulting in the herbicide coming into direct...

Ngày tải lên: 28/04/2016, 13:40

Ngày tải lên: 15/11/2015, 15:05

... The input soil properties of the dam and subsoil are described in Table Table Material properties of embankment modelling Sandy Clay (Dam) Soft Clay Fine Sand [kN/m³] Undrained 18.00 Undrained ... behaviour and stability of the structures The main purposes of FE-analyses are the determination of stresses including pore pressures, of stress/strain distribution, and the prediction of deformation ... above, initial soil conditions play an essential role in most soil deformation problems Initial horizontal soil stresses have to be generated by selecting proper -values MATERIAL MODELLING OF AN...

Ngày tải lên: 01/04/2013, 22:44

... contamination of Drinking water in Bangladesh WHO assignment report December 6-20, 1996 Jones, B and Manning, D A C (1994) Comparison of geochemical indices used for the interpretation of palaeoredox ... Preliminary Results of Groundwater investigation in Arsenic affected areas in Bangladesh A Report Prepared by RGAG Japan RGAG(1999) Arsenic contamination of ground water in Bangladesh Interim ... Atrai, Meghna flood plains and the tidal regions of the country (Fig-1) The datas and records of geological investigations of the areas adjoining to the western border in West Bengal show’s that...

Ngày tải lên: 05/09/2013, 08:40

... lacks any definition of a marine region It does, however introduce the idea of integrating the protection of the marine and coastal environment, requiring states to manage the marine environment and ... for protection of the marine environment in either the Arctic or the Antarctic Secondly, there is nothing in the 1982 LOS Convention or in general international law to inhibit the making of such ... Garcia-Amador, ‘Latin America and the Law of the Sea’, in L M Alexander (ed.), The Law of the Sea: A New Geneva Conference Proceedings of the 6th Annual Conference of the Law of the Sea Institute, Kingston,...

Ngày tải lên: 01/11/2013, 09:20

... prevention of the introduction of SALB including import requirements, inspection procedures, diagnostics, disinfection of plants from SALB endemic countries and capacity building in line with the ... The main form of propagation is budding, which involves the replacement of the shoot system of a plant with that of another more desirable plant In this process, a patch of bark of the seedling ... members of the Asia and Pacific Plant Protection Commission for their acceptance The APPPC has invested a great deal of effort and resources into achieving progress in safeguarding against the incursion...

Ngày tải lên: 08/03/2014, 10:20

... concentration of Cu in soil The accumulation of heavy metal in plant tissues of Brassica juncea L is reflected the concentration in soil The contents of Cu in plant increase upon the rates of Cu application, ... content of Cu in plants of Brassica juncea is reduced by 14% compared to the control sample In general, there is a reduction in growth rate of Brassica juncea when the content of Cu in soil increases ... concentration in soil and Cu content in plant shows a significant positive effect (Fig 1) Table The contents of Cu2+ in soil, Cu content in plant and plant height (fresh weight) Cu2+ in soil Plant...

Ngày tải lên: 14/03/2014, 15:20

... binding proteins in a tolerant strain of Pseudomonas putida, grown in a defined medium containing mM Cd2q Mechanisms of complexing Cd have evolved over time to allow the cell to survive high intracellular ... toxicity of Cd to several fungi in soil with an increasing content of montmorillonite Presence of different mineral nutrients, cations or anions in the soil can also alter the toxicity of Cd by ... 4–27% of the total microbial biomass in the soil (McCann and Cullimore, 1979) and are involved in maintaining soil fertility and oxygen production (Bold and Wynne, 1978) Mineralization of algae...

Ngày tải lên: 15/03/2014, 23:21

... use of reduced tillage systems, including ZT, and phosphate fertilization are increasing dramatically The widespread use of this technology along the time will affect the soil properties of the ... hypothesize that concentrations of trace elements will increase and stratify in those soils However, as a consequence of the recent introduction of zero tillage and the lack of fertilization history, ... located in Pergamino Ž33Њ56Ј S; 60Њ34Ј W The soil is a Pergamino Series, fine illitic thermic Typic Argiudoll ŽTable In 1979 three soil treatments started: Ži a pasture of Festuca arundinacea,...

Ngày tải lên: 15/03/2014, 23:22

... thus indicating some physical protection in less-accessible pores Since 71 –82% of DOM was obtained in the batch extracts, DOM conservation in the smallest pores may be of major importance in soils ... al (1994) determined the effects of N additions on the mineralisation of DOM obtained from water extracts of soil samples taken at different depths of a pasture profile In the subsoil (80 – 224 ... as an indicator of metal toxicity in soils Soil Biol Biochem 33, 235 – 240 Metting, F.B., 1993 Structure and physiological ecology of soil microbial communities In: Metting, F.B (Ed.), Soil Microbia...

Ngày tải lên: 15/03/2014, 23:22

... concentrations of Cd and As in soils were increased, the contents of Cd and As in agricultural products were significantly increased, basically The contents of Cd in the edible parts of chinese cabbage, ... the contents of Cd in edible part of chinese cabbage, radish and lettuce grown at the 0, 5, 10, 25, 50, and 100 mg kg-1 of Cd treated soils The contents of Cd in edible part of chinese cabbage, ... edible part of chinese cabbage, radish, and lettuce grown at the Cd treated soils Contents of As and Cd in edible part of chinese cabbage, radish, and lettuce The contents of As and Cd in agricultural...

Ngày tải lên: 16/03/2014, 00:07

... amendments increased As leaching from CCA soil in the absence of the fern, but decreased in the presence of the fern For the ASC soil, both treatments reduced As leaching regardless of the presence of ... spiking of As into the soil, in which As was predominantly associated with the labile exchangeable and aluminum oxide fractions ($ 80% of total As) On the other hand, in the CCA, soil As was mainly ... significant change in pH of the CCA soil was probably due to the similar pH of the soil and each of the amendments The application of the neutral pH amendments increased pH of the acidic ASC soil at first...

Ngày tải lên: 16/03/2014, 00:07

... of 15 × 20 m on I-75 in Cincinnati, during five rainfall events in 1995 Their results showed that the event mean concentrations (EMC) HEAVY METAL CONTAMINATION IN SOILS OF URBAN HIGHWAYS 297 of ... amount of Pb in a 15 × 20 × 0.3 m volume of the soil was calculated as 74 kg The amount of Pb contamination in runoff, which is 68 µg L−1 , was obtained by taking the average of the five runoff events ... highway has been in use This value includes only the amount of contamination coming from abrasion of brakes, tires of vehicles, etc In calculation 311 HEAVY METAL CONTAMINATION IN SOILS OF URBAN HIGHWAYS...

Ngày tải lên: 16/03/2014, 00:25

... typically greater in acidic soils than alkaline soils, neutralizing agents in the form of lime are commonly added to acidic soils Although the primary incentive in liming acidic arable soils is the ... difference being more pronounced in the Egmont soil (Figure 1A) An increase in soil pH has often been shown to enhance the solublilization of organic matter, resulting in an increase in the concentration ... concentration of dissolved organic carbon (DOC) (Temminghoff, 1998) In the present study the concentration of DOC increased with increasing pH, and the pH-induced increase in DOC was higher in the KOH-treated...

Ngày tải lên: 16/03/2014, 00:25

... glycoprotein [28,29], in uenza virus hemagglutinin [30,31], and IgM [32] in ER, a further role of N-linked oligosacharide chains of fhx/P25 in the process of assembly of the elementary unit in ER ... action of Golgi a1,2-mannosidases to yield only the 27-kDa molecule in the secreted fibroin In order to examine a role of L-chain in the protection of a1,2-mannose residues of fhx/P25 in the elementary ... 0.04 : L-chain fhx/P25 A role of L-chain in the protection of a1,2-mannose residues of the N-linked oligosaccharide chains of fhx/P25 in the elementary unit The PSG cell extract of Nd-sD mutant...

Ngày tải lên: 16/03/2014, 16:20