विभिन्न अवस्था के झींगों और मछलियों को खिलाने केलिए बडी मात्रा में जीवित खाद्यों का संवर्धन

ताल संवर्धन में झींगों और मछलियों के भोजन के रूप में जीवित खाद्य अत्यंत महत्वपूर्ण है, विशेषकर झींगों और मछलियों के डिंभकावस्था और किशोरावस्था में आर्टीमिया सालिना रोटिफेर ब्रखियोंनस आदि प्रमुख जीवित खाद्य ह

Sea ranching of sea cucumbers

Sea ranching of sea cucumber

Studies on the Corrosion Performance for Steel Embedded in Fly Ash Blended Concrete

The present investigation it to study the corrosion performance of fly ash blended cement concrete in chloride-contaminated environments by various electrochemical and non-electrochemical techniques. The chloride binding ability at the optimum replacement level of fly ash was also studied

Hatchery Techniques and Culture of the Sea-cucumber Holothuria scabra

In India the Beche-de-mer industry is very ancient one. Till recently the whole fishery was supported only by a single species namely Holothuria scabra. As a result of this the natural populations dwindled down alarmingly. In order to eiu-ich the natural populations a Research Project was taken up by the Central Marine Fislieries Research Institute at Tuticorin Research Centre in 1987 on the hatchery and culture of sea-cucumbers. Break-through was achieved in 1988 in inducing Holothuria scabra to spawn in the laboratory for the first time by thermal stimulation and producing seeds. Since then several spawnings have taken place and seeds produced. In 1992 the Marine Products Export Development Authority, Cochin has sanctioned a Research Project for six lakhs rupees for three years on intensive seed production and sea-ranching of sea-cucumbers. This has given a further impetus to the work

EFFECT OF pH ON THE GROWTH AND CHARACTERIZATION OF GLYCINE SODIUM CHLORIDE (GSC) SINGLE CRYSTAL

ABSTRACT Single crystals of semi-organic non-linear optical Glycine Sodium Chloride (GSC) have been successfully grown from three different pH (1.1, 6.0, and 10.8

Experiments on broodstock development and spawning of Epinephelus tauvina (Forskal)

The present paper reports on broodstock development and spawning of the greasy grouper Epinephelus tauvina in indoor 5 ton capacity FRP tanks in recirculating sea water system, under controlled conditions. The broodstock was developed in the culture system by rearing the wild fingerlings, caught in the size range 90 to 200mm. After attaining maturity, the fishes were fed with supplementary diet for developing them into mature females. Simultaneously, a few were administered the male hormone methyltestosterone (MT) for sex inversion to males. Mature spermiating males were developed by this technique. A mature female fish weighing 3.85 kg and a single spermiating male weighing 3.25 kg have spawned spontaneously in the same indoor tank consecutively for two days from 29-10-1998 to 30-10-1998 and also from 20-12-’98 to 23-12-’98, producing approximately 2,50,000 eggs in each spawning. On both the occasions, the same hormonally sex inverted male has spermiated. Fertilization rate was over 90%. Eggs measured 0.920 mm with a single oil globule. The eggs hatched out at 23 hours. Hatching rate observed in the first spawning was 60% and in the second instance, 45%. Newly hatched larvae measured 1.74mm. After 68 hours the larval mouth has opened and feeding has started

Oil slick in the inshore waters to the north of Cochin Port Channel

The oil samples resembles that of Gulf crude oil and was not seen in Fort Cochin area south of the fairway channel, the oil slick might have caused extensive damage to the intertidal organisms including bivalve spat populations attached to the granite wall constructed to check sea erosion. Strict enforcement of preventive measures is recommended against such oil spillage

Relationship between ultrasound detected tendon abnormalities, and sensory and clinical characteristics in people with chronic lateral epicondylalgia

ObjectiveTo investigate the relationship between tendon structural changes determined by static ultrasound images (US) and sensory changes using quantitative sensory testing (QST), and clinical measures in lateral epicondylalgia.Materials and methodsBoth elbows of 66 adult participants with a clinical diagnosis of lateral epicondylalgia were investigated. Using a standardised ultrasound image rating scale, common extensor hypoechogenicity, heterogenicity, neovascularity, and bony abnormalities at the enthesis were scored, and tendon thickness (longitudinal and transverse plane) was measured by a trained assessor. Sensory measures of pressure, heat and cold pain thresholds and vibration detection threshold were recorded. Pain and function were assessed using the patient-rated tennis elbow (PRTEE), pain-free grip strength, pain visual analog scale (PVAS) and quality of life (EuroQoL EQ -5D). Univariate and multivariate linear regression analyses were used to explore the association between tendon structural, sensory and clinical variables which were adjusted for age, gender and duration of symptoms.ResultsA negative correlation was identified between the presence of neovascularity and cold pain threshold (P = 0.015). Multiple regression analyses revealed that a combination of female gender (P = 0.044) and transverse tendon thickness (P = 0.010) were significantly associated with vibration detection threshold in affected elbows, while gender (P = 0.012) and total ultrasound scale score (P = 0.024) were significantly associated with heat pain threshold and vibration detection threshold in unaffected elbows. Heat pain threshold and gender were significantly associated with pain and disability (PRTEE; P ConclusionGenerally, structural and sensory measures were weakly correlated. However, neovascularity and transverse tendon thickness may be related to sensory system changes in LE

Seeding Success through Innovation & Technology: Role of Innovations in Transforming Indian Agriculture

Agriculture remains the most important sector for India, vital for ensuring its food and nutritional security. From an economic perspective, the sector provides livelihood means to over 58 percent of the nation’s population, while contributing 14 percent to the Gross Domestic Product (GDP) by providing bulk of the wage goods required by non-agriculture sectors, and most of the raw materials for the industries. The Green Revolution and the transformation it brought about to this sector helped in easing poverty, and proved that agricultural development has a direct role in improving the livelihood of the people and the society. However, despite its importance, various indicators from the sector show that all is not well. Across the world, the challenges facing the sector are immense: declining natural resources, smaller landholdings and lesser area for cultivation, erratic monsoons, climate change crisis, energy crisis, loss of biodiversity, weak extension machinery, rising input costs, inadequate storage infrastructure, high post-harvest losses, and lack of access to markets. There is also an urgent need to promote the competitiveness of this sector and gearing up our agricultural systems including technological aspects so as to meet the pressures of consumer demand and international markets

A search for fast radio bursts associated with gamma-ray bursts

The detection of seven fast radio bursts (FRBs) has recently been reported. FRBs are short duration (~1 ms), highly dispersed radio pulses from astronomical sources. The physical interpretation for the FRBs remains unclear but is thought to involve highly compact objects at cosmological distance. It has been suggested that a fraction of FRBs could be physically associated with gamma-ray bursts (GRBs). Recent radio observations of GRBs have reported the detection of two highly dispersed short duration radio pulses using a 12 m radio telescope at 1.4 GHz. Motivated by this result, we have performed a systematic and sensitive search for FRBs associated with GRBs. We have observed five GRBs at 2.3 GHz using a 26 m radio telescope located at the Mount Pleasant Radio Observatory, Hobart. The radio telescope was automated to rapidly respond to Gamma-ray Coordination Network notifications from the Swift satellite and slew to the GRB position within ~140 s. The data were searched for pulses up to 5000 pc cm−3 in dispersion measure and pulse widths ranging from 640μs to 25.60 ms. We did not detect any events ≥6σ. An in depth statistical analysis of our data shows that events detected above 5σ are consistent with thermal noise fluctuations only. A joint analysis of our data with previous experiments shows that previously claimed detections of FRBs from GRBs are unlikely to be astrophysical. Our results are in line with the lack of consistency noted between the recently presented FRB event rates and GRB event rates