93 research outputs found
Effect of air flow on tubular solar still efficiency
BACKGROUND: An experimental work was reported to estimate the increase in distillate yield for a compound parabolic concentrator-concentric tubular solar still (CPC-CTSS). The CPC dramatically increases the heating of the saline water. A novel idea was proposed to study the characteristic features of CPC for desalination to produce a large quantity of distillate yield. A rectangular basin of dimension 2 m × 0.025 m × 0.02 m was fabricated of copper and was placed at the focus of the CPC. This basin is covered by two cylindrical glass tubes of length 2 m with two different diameters of 0.02 m and 0.03 m. The experimental study was operated with two modes: without and with air flow between inner and outer tubes. The rate of air flow was fixed throughout the experiment at 4.5 m/s. On the basis of performance results, the water collection rate was 1445 ml/day without air flow and 2020 ml/day with air flow and the efficiencies were 16.2% and 18.9%, respectively. FINDINGS: The experimental study was operated with two modes: without and with air flow between inner and outer tubes. The rate of air flow was fixed throughout the experiment at 4.5 m/s. CONCLUSIONS: On the basis of performance results, the water collection rate was 1445 ml/day without air flow and 2020 ml/day with air flow and the efficiencies were 16.2% and 18.9%, respectively
Experimental Study on a Compound Parabolic Concentrator Tubular Solar Still Tied with Pyramid Solar Still
Neoplasia in oil sardine from Palk Bay
During a routine fishery survey programme at
Irumeni fishing village, Palk Bay on 03rd December
2016, a single specimen of oil sardine Sardinella
longiceps with neoplasia, measuring 163 mm in total
length (TL) and weighing 119 gram was collected
from the gillnet landings. The specimen was a
female with empty stomach
Histomorphology and immunohistochemistry of adenocarcinoma and fibroma in Indian oil sardine (Sardinella longiceps Valenciennes, 1847) from Palk Bay, Southeast coast of India
A single specimen of Indian oil sardine Sardinella longiceps was observed with wart-like appearances in three different regions of the fish: one on the premaxillary part, and other two on the skin and at the vent region respectively. Mucosal tissues were expunged and preserved in 10 % neutral phosphate-buffered formalin for histological examination. Based on the histopathological analysis, lesions were identified as adenocarcinoma and fibroma on the premaxillary part and skin, respectively. Based on the immunohistochemistry, vimentin and cytokeratin-like proteins were demonstrated, suggesting that the wart-like extrusions were fibroma and adenocarcinoma respectively
Integrative taxonomic approach to the systematics of the genus Pampus
In capture fisheries management, fish populations play a critical role in deciding management units
employed. Projects like FishPopTrace have been employed in Europe, facilitating use of genetic data and
morphological markers, including otoliths for this purpose. Multispecies, multi-gear fisheries landing
closely resembling species mixes found in a common ecosystem or fishing ground is widespread in the
Indian EEZ. Pomfrets are a low -volume, high value marine fishery in India and an important targeted
fishery resource in the Indian Ocean region. However, the taxonomy of the genus Pampus has remained
complex till date, with literature indicating several cryptic species leading to misidentification and
nomenclature issues. This has serious ramifications for traceability concerns in seafood trade and supply
chains as well to address sustainability concerns while preparing species specific fisheries management
plans. A recent study involving an integrative taxonomic approach with conventional taxonomy tools
as well as genetic data and otolith structure, has helped to clarify the taxonomic status of the genus
Pampus in the Indian EEZ and the new findings with a global outlook is summarized below
Course Manual on Marine Fisheries & Mariculture Prepared for the Training programme for B.F.Sc students of Central Agricultural University (CAU), Tripura
The undergraduate Fisheries Science students are required to know about the inland and marine fisheries. The students from landlocked area are getting rare opportunity to understand the marine fisheries and mariculture activities. Hence, based on the request of the Central Agricultural University (CAU), Tripura as a part of their academic activities, the Director, ICAR-CMFRI, has kindly approved a 10 days in-plant training for B.F.Sc. final year students at the ICAR-Central Marine Fisheries Research Institute (CMFRI), Mandapam Regional Centre. The training was organized in collaboration with Agricultural Technology Information Centre (ATIC), ICAR-CMFRI, Kochi. A total of 27 B.F.Sc students and a faculty of Central Agricultural University (CAU), Tripura participated in the training programme during 17th to 26th January, 2020. The training emphasized on the skill development of students through hands on training on mariculture activities and field visits to fish landing centres. A course manual was prepared covering the major topics on marine capture fisheries and mariculture. I congratulate all those who have put in their sincere efforts to bring out this manual
Note on mass mortality of Bloch’s gizzard shad at Dhanushkodi lagoon, Tamil Nadu
Mass mortality of Bloch’s gizzard shad, Nematalosa nasus (Bloch, 1795) was observed around 5 km shore area of the lagoon from Ottathalai to Thavukadu near near the Kothandaramar Temple, Dhanushkodi, Ramanathapuram District, Tamil Nadu on 19th October 2019. An estimated 3 tonnes of Nematalosa nasus were washed ashore and water samples collected from the site were analysed indicated Dissolved oxygen (2.17ppm), pH (7.83ppm), salinity (40ppt), temperature (30.6oC), ammonia, nitrite and nitrate (0.1, 0.2 and 0.43 ppm respectively)
Bycatch in Indian trawl fisheries and some suggestions for trawl bycatch mitigation
Globally, trawl is the major fishing gear used in marine
fisheries and in India, it contributes to more than onethird of the marine fish production. Trawl fishing has
been critically evaluated from a sustainability perspective, especially analysing its bycatch composition. Most
of the bycatch from trawlers contains valuable edible
species with high market demand. However, a portion
of the bycatch which does not have such demand in the
edible fish market, known as low-value bycatch (LVB),
continues to be a matter of concern from an ecological and
economic perspective. During 2017–19, 30–60% of trawl
landing in India was constituted by LVB, which was
mainly used for fishmeal preparation. To enhance the
value and utility of LVB, this study explores the possibility
of converting waste from LVB into edible resources using
pufferfish and triggerfish. It also highlights the positive
impact of efforts by different Government agencies for
bycatch mitigation like the implementation of minimum
legal size in reducing the juvenile component in bycatch,
with a social survey-based account of fisher’s perceptions
and suggestions on successful bycatch mitigation
Cryo-EM structures of complex I from mouse heart mitochondria in two biochemically defined states.
Complex I (NADH:ubiquinone oxidoreductase) uses the reducing potential of NADH to drive protons across the energy-transducing inner membrane and power oxidative phosphorylation in mammalian mitochondria. Recent cryo-EM analyses have produced near-complete models of all 45 subunits in the bovine, ovine and porcine complexes and have identified two states relevant to complex I in ischemia-reperfusion injury. Here, we describe the 3.3-Å structure of complex I from mouse heart mitochondria, a biomedically relevant model system, in the 'active' state. We reveal a nucleotide bound in subunit NDUFA10, a nucleoside kinase homolog, and define mechanistically critical elements in the mammalian enzyme. By comparisons with a 3.9-Å structure of the 'deactive' state and with known bacterial structures, we identify differences in helical geometry in the membrane domain that occur upon activation or that alter the positions of catalytically important charged residues. Our results demonstrate the capability of cryo-EM analyses to challenge and develop mechanistic models for mammalian complex I
Telomeres and telomerase in head and neck squamous cell carcinoma: from pathogenesis to clinical implications
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