385 research outputs found
Tapping the unexploited plant resources for the synthesis of silver nanoparticles
Development of biologically inspired experimental processes for the synthesis of nanoparticles is evolving into an important branch of nanotechnology. The bioreduction behaviour of various plant leafextracts such as Helianthus annus (Asteraceae), Basella alba (Basellaceae), Oryza sativa, Saccharum officinarum, Sorghum bicolour and Zea mays (Poaceae) in the synthesis of silver nanoparticles wasinvestigated employing UV/Visible spectrophotometry, XRD (X-ray diffraction) and SEM (Scanning Electron Microscopy). H. annus was found to exhibit strong potential for rapid reduction of silver ions. It was observed that there is no correlation always between the colour development and the increase in absorbance exhibited by the nanometal synthesised. The work adds to the confirmation of previous reports on biosynthesis of nanometals using plant leaf extracts
Evaluating the use of apache ii score in predicting the severity and clinical outcomes of organophosphorous poisoning.
This study was done to know the efficacy of APACHE II score in predicting the
severity and clinical outcomes of organophosphorous poisoning.
METHODOLOGY:
Patients admitted to toxicology unit of madras medical college and Rajiv Gandhi
government general hospital with confirmed history of oraganophosphorous poisoning [OPC]
are included in the study. Total sample size is 75. The study period is July 2014 тАУ September
2014. All patients admitted in the toxicology ICU unit with confirmed or documented history
of OPC poisoning are subjected to investigations and the APACHE II score is calculated with
worst values obtained within 24 hours of admission
RESULTS:
All the patients are included in the analysis the study result showed that the difference
in APACHE II score is significant among the survivors and non survivors with p value
0.0001 (<0.05).
CONCLUSION:
APACHE II score is useful in the predicting the clinical outcome in the Acute
Organophosphorous poisonings in the Intensive care settings
Studies on energy transformation in the freshwater snail Pila globosa 1. Influence of feeding rate
The effects of eleven chosen feeding levels ranging from 0 to 198 mg damp dry (plant)
Ceratophyllumlg live snail /day on the absorption, conversion and metabolism of the
snail Pi/a globosa (of 1тАв9 g body weight) have been studied. Absorption rates increased
from 3тАв0 to 21тАв0 mg dry food /g live snail/day in snails fed 3-4-28'8 mg dry food/
g live snail/day. In these snails, absorption efficiency decreased from 87тАв5 to 73тАв0 %
Participatory management for conservation of seahorses in the Gulf of Mannar, South-east coast of India
The Inception Workshop of the research project тАЬParticipatory management for conservation of
seahorses in the Gulf of Mannar, south-east coast of IndiaтАЭ was organized on 27 December 2014 at
the Mandapam Regional Centre of the Central Marine Fisheries Research Institute (ICAR),
Mandapam Camp, Tamil Nadu.
The workshop was aimed to mark the beginning of the project activities in the Gulf of Mannar and
also to bring to one place all the concerned stakeholders who are directly or indirectly associated
with sustainable management of seahorse fishery and conservation, and to inform them about the
project, its objectives and the expectations. The workshop was also aimed to discuss and get
feedback on the methodology and approach for implementation of the project activities such as field
surveys and interviews with the stakeholders. The workshop also focused to gather valuable inputs
from various stakeholders, which are vital for the on-going project
Assessment of low value bycatch and its application for management of trawl fisheries
In recent years, large quantities of low value bycatch (LVB) are landed by trawlers for use as
fish meal and in fertilizer. Several fish meal plants have been established and high demand
for the raw material is acting as an incentive for catching and landing large quantities of
LVB. In Karnataka (a coastal state along west coast of India) alone, the annual turnover of
fish meal and fertilizer plants is estimated to be around 270 million rupees (= 4.6 million
US$).The landed LVB is turning out to be a sizeable income to the trawl operators. There are
several concerns related to increasing bycatch of the trawlers. The bycatch is comprised of
a high percentage of juveniles of commercially important species, resulting in recruitment
overfishing. With the introduction of high speed semi-pelagic trawls, the adults of low-valued,
small-sized adult fishes are also removed in large quantities, impacting the coastal marine
resources. The current situation demands a robust management plan addressing the issues of
the bycatch and in this regard information on quantities, value and composition of lVB landed
and/or discarded, and seasonality of the catch are essential
Feeding habits of milk shark, Rhizoprionodon acutus (Ruppell, 1837) in the Gujarat coastal waters of north-eastern Arabian Sea
The feeding habit of milk shark Rhizoprionodon acutus was investigated in 684 specimens collected along
Gujarat coast (India) of north-eastern Arabian Sea from January 2013 to December 2014. The length range
of females was 32тАУ89.6 cm and males 33.5тАУ89 cm. The shark foraged on diversified prey items which
were pooled into four distinct groups i.e., teleosts, crustaceans, mollusks and annelids. Teleosts (Dietary
coefficient, %QI = 83.05 and index of relative importance, %IRI = 78.40) were found to be the preferred
food items followed by crustaceans (%QI = 16.21; %IRI = 19.78), which formed the secondary food item
group. Mollusks (%QI = 0.74; %IRI = 1.69) and annelids (%QI = 0.01; %IRI = 0.14) constituted the
accidental or accessory food items. The species, though is a pelagic predator, probably performs vertical
movements in search of prey items. The shark also showed some sorts of preference and selectivity for
clupeids, engraulids and carangids. Females though showed significantly lower index of relative fullness
(IRF) (P тЙд 0.5) and comparatively lower vacuity index and lower mean number of preys per stomach
compared to the males, the preference for prey items was not found to be significantly different between
the females and males. Juveniles were found to have significantly higher IRF (P тЙд 0.5) and comparatively
higher vacuity index than that of the adults, whereas the mean preys per stomach was found to be
lower than that of the adults. Moreover, the prey preference was also significantly different between the
juveniles and adults. The study provides necessary baseline information about the feeding habits of the
shark in the region which will be helpful in understanding the trophodynamics of the species under the
influence of overfishing and climate change
Major and minor fisheries harbours of India. 7. The fisheries harbours and fishery along the north Tamilnadu and south Andhra Pradesh coasts
There are four functional fisheries harbours in the north Tamil Nadu-south Andhra Pradesh coast, viz., Chennai (major), Nizampatnam, Cuddalore and Pazhayar (minor). A medium harbour in Pondicherry is under construction. There is a temporary jetty in Krishnapatnam and a fish landing platform in Pulicat
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