Browsing by Author "Padma Devi S N"

Filter results by typing the first few letters
Now showing 1 - 2 of 2
  • No Thumbnail Available
    Item
    INFLUENCE OF SOIL FUNGI ON CORROSION OF MILD STEEL PLATES
    (NACE International, 2018) Dharani R; Deepalakshmi R; Padma Devi S N; NithyaMeenakshi S; Nalini D
    Metal corrosion is an electrochemical reaction between the environment and a metal, in which microbes are thought to play a very important role. These microorganisms do not only cause corrosion, but they can also inhibit or protect against corrosion. Fungi are the most dessicant–resistant microorganisms and are ubiquitous in atmospheric environments. About five fungal organisms were isolated using Starkey media from the soil of corroded pipeline tank. The influence of these fungal isolates on both rusted and non–rusted mild steel plates were studied for a period of 25 days. Among the five fungal isolates, Non–rusted Isolate (NR)–1 and Rusted Isolate (R)–3 showed minimum corrosion reaction on mild steel plates, based on the results of weight loss and dissolved iron content. The results revealed that the two isolates showed minimum rate of corrosion on mild steel plates due to the passive mechanism of …
  • No Thumbnail Available
    Item
    ORGANIC CULTIVATION OF MEDICINAL PLANTS: INFLUENCE OF COMPOSTED COIRPITH ON THE GROWTH AND YIELD OF COLEUS FORSKOHLII (WILLD.) BRIQ
    (Taylor and Francis group, 2016) Padma Devi S N; Meera Bai R S; Prince William S P M; Sunitha kumari K
    Coleus forskohlii (willd.) Briq. is a native plant of India. The therapeutic properties of forskolin, the main diterpene constituent of this plant contributed to the emergence of C. forskohlii as an important taxon in modern medicine. In the present study, composted coir pith (CCP) was used as an organic fertilizer and its effect on the growth, the primary metabolite and secondary metabolite (forskolin) of C. forskohlii were studied. The CCP was amended to the soil in the plots at the rate of 5 t h-1(T1), 10 t h-1(T2) and 15 t h-1(T3). The control plots were left unamended. It was found that CCP increased the growth and development of C. forskohliiin fields amended with 15 t h-1(T3). The activity of the three prime soil enzymes namely urease, phosphatase and dehydrogenase in the rhizosphere soil of C. forskohlii also increased with increase in the quantum of CCP amended to the soil.