Informatics Publishing Limited

Neha Rawat ¹

Affiliations
1 Axis Institute of Architecture, Kanpur, IN

Abstract

"Streets" a place one met every day in our life, it connects one place with another or one can say it connects human life. Streets are the public space and environment which performs so many formal and informal activities throughout the day for its users like street markets, a place for rest and recreational activities. Streetscape defines the space between the building facades (and building line) including footpath, the curb, and other public spaces, such as plazas, parks adjacent to the streets. Streets with such a great importance are constantly being neglected in our everyday built environment system. This affects the role and quality of streets. There is a need to rethink our perspective for streetscape design considering all the parameters related with the street and their user, different functions of the street, principles of public realm space etc. The paper deals with the understanding of streetscape design and its importance in life.

Keywords

Street, Streetscape, Quality of Streetscape.

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Pallavi Kaushik ¹, Neha Rawat ¹, Megha Mathur ¹, Priyanka Raghuvanshi ¹, Pradeep Bhatnagar ¹, Harimohan Swarnkar ², Swaran Flora ²

Affiliations
1 Department of Life Sciences, The IIS University, Jaipur-302020, IN
2 Division of Pharmacology and Toxicology, Defence Research & Development Establishment, Gwalior - 474 002, IN

Abstract

Arsenic-contaminated areas of Sanganer, Jaipur, Rajasthan, India were surveyed for the presence of metal resistant bacteria contaminated with textile effluent. Samples were collected from soil receiving regular effluent from the textile industries located at Sanganer area. The properties like pH, electrical conductivity, organic carbon, organic matter, exchangeable calcium, water holding capacity and metals like arsenic, iron, magnesium, lead and zinc were estimated in the contaminated soil. In total, nine bacterial strains were isolated which exhibited minimum inhibitory concentration (MIC) of arsenic ranging between 23.09 and 69.2mM. Four out of nine arsenic contaminated soil samples exhibited the presence of arsenite hyper-tolerant bacteria. Four high arsenite tolerant bacteria were characterized by 16S rDNA gene sequencing which revealed their similarity to Microbacterium paraoxydans strain 3109, Microbacterium paraoxydans strain CF36, Microbacterium sp. CQ0110Y, Microbacterium sp. GE1017. The above results were confirmed as per Bergey’s Manual of Determinative Bacteriology. All the four Microbacterium strains were found to be resistant to 100μg/ml concentration of cobalt, nickel, zinc, chromium selenium and stannous and also exhibited variable sensitivity to mercury, cadmium, lead and antimony. These results indicate that the arsenic polluted soil harbors arsenite hyper-tolerant bacteria like Microbacterium which might play a role in bioremediation of the soil.

Keywords

Arsenic, bacteria, hyper-tolerance, metal-resistant

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