Surekhamol, I S; Dr.Bright Singh,I S(Cochin University of Science and Technology, November , 2012)
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Abstract:
Aquaculture is a global industry providing food and employment thereby contributing to the economy. For the sustenance of aquaculture, disease management is a major requirement. Among the bacterial pathogens Vibrio harveyi remains to be the major one especially in shrimp culture systems. Rapid
and mass mortality of shrimp larvae due to Vibrio harveyi infection is well known, and the pathogen causes serious economic losses in grow out systems as well. It suggests that a well defined management strategy has to be built up to protect the crop from Vibrio harveyi infection in aquaculture systems. Antibiotics have been the choice for quite some times which led to residues in meat and development of multidrug resistant bacteria which invited ban on their application. In this context several alternate options have been thought off such as probiotics, immunostimulants and vaccines. Phage therapy is yet another option. Phages being natural parasites of bacteria and are abundant in aquatic environments their application to control bacterial pathogens in aquaculture has commendable potential in lieu of antibiotics. For that matter the therapeutic effect of phages has been proven in several antibiotic resistant pathogens inclusive of Vibrio harveyi.
Description:
National Centre for Aquatic Animal
Health, School of Environmental Studies, Cochin University of Science and Technology
Peter, Varkey K; Dr.Sivasankara Pillai, V N(Cochin University of Science and Technology, December , 2002)
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Abstract:
The Kerala Water Authority requested the School of Environmental Studies to
carry out investigations on the mechanism of sporadic mobilization of iron and
odour in the raw water drawn to the drinking water treatment plant. The
currently used treatment process failed to remove iron completely. This led to
problems in the filter and complaints of taste and colour due to iron in the
finished water. The sporadic nature of the problem itself made the trouble
shooting difficult.
The problem was looked in from three points of view.
1. Influence of environmental (climatic) conditions on the dynamics of
the relevant basin of the reservoir.
2. Influence of the physical dynamics on the physico — chemical quality
of water.
3. Identification of cost-effective treatment processes to suit the existing
plant.
Since the problem emerged only during the post- monsoon to pre-monsoon
months, a related problem was investigated, namely, influence of anions on
the oxidation of Fe(II) in natural waters by air. This is presented in Part II of
the dissertation.
Description:
School of
Environmental Studies, Cochin University of Science and Technology
Soman, C K; Dr.Jose, Kallarackal(Cochin University of Science And Technology, May , 1997)
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Abstract:
Investigations on the water relations and gas exchange of/tcacia aun'culiji_2rmis
were carried out in natural and controlled environments. The experiments were
performed in both seedlings and five year old trees. Different sets of experiments
were conducted in Acacia plantations, at Kothachira, Palakkad District and in
.seedlings, at KFRI campus nursery mainly during the summer months. Investigations
were also extended to seedlings of A.mangium, Aaulacocarpa and /Lholocericea,
which are also phyllodinous species with the intention of comparing their physiology
with Acacia auriculifomus.
Potted seedlings of four species of Acacia viz., A. auriculi/E)/7r:i.r, /I.
aulacocarpa, A. holocericea and A. mangium were used for the study.
Measurements of relative water content (RWC), water potential, photosynthetic rate,
transpiration, stomatal conductance, water use efficiency etc. of phyllodes were
measured diumally in plants subjected to three stress conditions namely, drought,
salinity and flooding