Ashish Tewari

Learn More
The main pollutants for the ship scrapping industry and its associated wastes at Alang are heavy metals, petroleum hydrocarbon and bacterial contaminations. The concentration of iron, manganese, cobalt, copper, zinc, lead, cadmium, nickel and mercury were 25 to 15,500% more at nearshore station of Alang as compared to control site at Piram. The(More)
The bioaccumulation ability of five species of seaweeds to 15 metals was studied in the seawater polluted by the effluent of soda ash industry. The bioaccumulation of Al, Mn and Fe in these seaweeds increased continuously as distance increased from outfall. However, Padina tetrastromatica showed reverse trend. Quite a number of metals like Au, Co, Hg, Ni,(More)
In a multi input and output (MIMO) process mathematical modeling of the physical systems has gained importance due to the complexity of interactions within the system. All the parameters used in a model cannot be determined accurately. The major problem in a multivariable process is that loop interaction can arise and cause difficulty in feedback control(More)
We studied variations in tree biomass and carbon sequestration rates of Chir Pine (Pinus roxburghii. Sarg.) forest in three categories of forest disturbance, protected, moderately disturbed, and highly disturbed. In the first year, total biomass was 14.7 t·ha−1 in highly disturbed site, 94.46 t·ha−1 in moderately disturbed forest, and 112.0 t·ha−1 in(More)
Fine roots (≥1 mm) production in Chir Pine (Pinus roxburghii Sarg.) forests was estimated across three different seasons for one year at four sites located between 1600–1850 meters elevation on two contrasting aspects. At each site three different slope positions (ridge slope, mid hill slope and hill base) were selected for the study. The tree density(More)
Significant effect of water stress conditions were observed on morphological and physiological growth parameters of tea (Camellia sinensis). Water stress tolerant tea clones suitable for hilly areas have been identified in this study. The influence of different levels of water deficit on physiological and morphological parameters in tea [Camellia sinensis(More)
The aim of the present study is to check the effect of soda ash industry effluent on the protein content of the seaweed Ulva faciata and Chaetomorpha antennina. Study shows that the effluent has positive effect on the protein content of the alga and thus these species can be used to reduce the effect of soda ash industry pollution because the rise of up to(More)
This paper presents the results of a study on the impact of the effluent released by the soda ash industry on important red and brown macro algal species Gelidiella acerosa, Gracilaria corticata, Soleria robusta, Sargassum tenerrimum, Padina tetrastromatica in the tidal zone around Veraval, on the west coast of India, in the lowest low water tide of(More)
Fruits of Aisandra butyracea (Roxb.) Lamb. were collected from two sites located at different altitudes in Kumaun Himalaya for analyzing the seed maturity in relation to various fruit and seed characters. The mean seed size (length x width) across the collection dates varied between 186.44 +/- 0.05 and 238.17 +/- 0.5 mm2 across both the elevations. The(More)
  • 1