General specifications for a captive power driven compressors and dryer system

Design, Construction, Manufacture, Supply to, Erection, Testing, Commissioning of the captive power driven compressors and dryer system (CPDCDS

<span style="font-size:14.0pt;line-height: 115%;font-family:"Times New Roman";mso-fareast-font-family:Fd1596850-Identity-H; color:black;mso-ansi-language:EN-IN;mso-fareast-language:EN-IN;mso-bidi-language: HI" lang="EN-IN">Electrochemical characterization of LaNi₅ hydride electrode</span>

690-696Galvanostatic, cyclic voltammetric and linear polarization characteristics of LaNi5 electrode with respect to cycling are presented. Variation in voltammetric charge-discharge current and potential values observed during cycling are discussed. Cyclic voltammetric redox currents are correlated with respective steps in P-C isotherms of LaNi5 – H2 system. The stepwise reactions taking place at the LaNi5 electrode like in normal gaseous mode of hydrogenation is established.Values of the exchange current density of LaNi5 electrode increases during cycling. Evolved gas analysis establishes the electrochemical hydrogen storage. Evolution of hydrogen from b-hydride phase takes place at room temperature, while from a-phase, hydrogen evolves at higher temperatures. Microscopic analysis indicates that microcracks in LaNi5 electrodes appear due to electrochemical cycling

Isolation, characterization and evaluation of the biocontrol potential of <em>Pseudomonas protegens</em> RS-9 against <em>Ralstonia solanacearum </em> in Tomato

595-603Tomato (Solanum lycopersicum) is a common vegetable crop with worldwide consumption of its edible fruit. Bacterial wilt in tomato causes substantial yield loss. Biological control using microbial agents such as rhizobacteria has gained considerable attention over the last decade. In this study, we isolated a bacterial strain, RS-9 from the rhizosphere of a healthy tomato plant in a bacterial wilt diseased field that strongly inhibited the growth of bacterial wilt pathogen Ralstonia solanacearum. Further, we characterized the antagonistic bacterium RS-9 and tried to understand the mechanism behind. Phylogenetic tree analysis based on similarity percentage identified RS-9 as Pseudomonas protegens. This strain showed potential inhibition of different phytopathogenic fungi in vitro and could produce 2,4-diacetylphloroglucinol (2,4-DAPG), hydrogen cyanide (HCN), pyrrolnitrin and pyoluteorin. To identify the key bioactive compound in RS-9, an antagonism defective mutant was generated by transposon mutagenesis. The HPLC analysis of mutant and parent strains identified 2,4-DAPG as the main compound responsible for suppression of R. solanacearum. Evaluation of RS-9 in greenhouse studies revealed inoculation of field soil in pots with RS-9 led to significant increase in plant height and dry weight of tomato plant and the incidence of bacterial wilt reduced by 65.6%. The bacterial strain RS-9 outcompeted the pathogen by reducing its population by 63% in soil as compared to the ‘pathogen only control’ as well as with the antagonism defective mutant, while maintaining its own population at high density. In conclusion, this study revealed Psuedomonas protegens RS-9 to be a promising strain for biocontrol of bacterial wilt of tomato

Effect of aggregate gradation on the mechanical strengths and permeability properties of porous concrete

Abstract Porous concrete (PC) is a very popular construction material in developed countries and is now finding application in India in parking lots. In this investigation, an effort was made to study the various performances of PC in the laboratory. Different gradations of coarse aggregates namely 4.75–10 mm, 10–12.5 mm, and 12.5–16 mm are considered to characterize PC adopting conventional compaction by tamping rod, additional 5 and 10 compactions by proctor hammer. The effect of varying compaction and the coarse aggregate gradation is studied on axial compressive, flexural tensile, and splitting tensile strengths of PC. In addition, a simple method is proposed to determine the permeability of all PC mixes. The work was extended to know the influence of low-grade fly ash and GGBS as supplementary cementing materials (SCMs) on the strengths and permeability of PC. Though the strength of PC in the presence of SCMs has decreased, the permeability and the estimated porosity of all mixes decreased compared to the 100% cement counterpart. A wide range of PCs were developed to suit several combinations of mechanical strength, density, and permeability depending on the type of application leading to a sustainable solution. The simple test method proposed to determine the permeability of the PC gives satisfactory results