Marine yeast isolation and industrial application

Over the last century, terrestrial yeasts have been widely used in various industries, such as baking, brewing, wine, bioethanol and pharmaceutical protein production. However, only little attention has been given to marine yeasts. Recent research showed that marine yeasts have several unique and promising features over the terrestrial yeasts, for example higher osmosis tolerance, higher special chemical productivity and production of industrial enzymes. These indicate that marine yeasts have great potential to be applied in various industries. This review gathers the most recent techniques used for marine yeast isolation as well as the latest applications of marine yeast in bioethanol, pharmaceutical and enzyme production fields. Keyword

Anti-hyperalgesic effect of paracetamol in rat model of thermal hyperalgesia: implications for the treatment of neuropathic pain

Background: Neuropathic pain conditions are prevalent in general population and difficult to treat. Most currently available therapies do not provide adequate benefit in all treated patients. Though Paracetamol is available for more than 100 years and have huge safety data, it is still not included in any treatment guidelines for neuropathic pain, as very few studies have evaluated its effects in neuropathic pain conditions. The aim of this study was to evaluate antihyperalgesic activity of paracetamol and to compare it with antihyperalgesic effect of amitriptyline and gabapentin in rat model of thermal hyperalgesia.Methods: Male albino wistar rats weighing 200-250 g of body weight and 4-6 months old were used. After anaesthetizing rats with 2% halothane, mild thermal injury was induced using hot plate analgesiometer. Drugs were administered intraperitoneally 30 minutes after thermal injury. Paw withdrawal latencies were measured at 30, 60, 90 and 120 minutes after drug administration. Statistical analysis done using GraphPad Prism version 5.01 and one way ANOVA followed by post hoc Dunnett's test or Tukey's test were used.Results: Paracetamol showed both dose as well as time dependent antihyperalgesic activity. Gabapentin demonstrated significantly more antihyperalgesic activity compared to amitriptyline (p< 0.05) and paracetamol (p< 0.01).Conclusions: Paracetamol showed antihyperalgesic activity however, it was less as compared to drugs like gabapentin and amitriptyline. Considering the excellent safety profile of paracetamol, it might be useful adjuvant drug for treatment of neuropathic pain conditions

Promoting the proper use of medicines in rural school children of India

Background: The problem of irrational use of medicines is prevalent in rural India. For safe and proper use of medicines there is a need to understand the proper way of taking medicines. Teaching proper use of medicines is the most neglected domain of the school health curriculum. So this study targeted school going children in rural area of India as the earlier the intervention, the more firmly longer lasting health related behavior can be successfully inculcated. The objectives of the study were (1) To study base level knowledge about use of medicines and (2) To implement and see the effect of an intervention to increase medicine knowledge in the form of information, education and communication (IEC) in rural school children.Methods: This was an interventional, questionnaire based (quantitative) study in which an intervention in the form of lectures which was given to school children. Rural school going children in age group of13-15 years were selected from 3 different schools of rural areas of Nagpur district, India. 500 school children were included after obtaining permission from school authorities and informed consent from their parents. Pretesting done by administering a questionnaire containing 20 questions to assess children's base level knowledge about medicine use. The same questionnaire was repeated on 16th and 45th day of intervention i.e. daily lectures of 25-30 minutes for 15 days on proper use of medicines, to judge the improvement.Results: It was observed that the interventions brought about a positive change in the knowledge of the students as well as increased awareness about proper use of medicines.Conclusions: This study showed that properly timed and meticulously implemented intervention can bring about a positive change in the attitude and knowledge of school children

Diversity of Pigments in Insects, Their Synthesis and Economic Value for Various Industries

Pigments play an essential role in imparting colors to the various organs of invertebrates particularly, insects. Genetic evolution and adaptive pigmentation of invertebrates have been studied which depicted that insect colors respond to the climatic changes. The physical, chemical and structural properties of insect pigments are being studied by researchers for years to elucidate their evolutionary aspects of physiology, metabolism, and economic importance for human welfare. Color development in insects varies within the species of different genera. In this state-of-the-art literature review, we discuss the variety of pigments other than visual ones found in different species of insects. The review also highlights the potential benefits or functions of pigments to insects

Diversity and Functions of Chromophores in Insects: A Review

Insects are the most diverse among the animal kingdom. The diversity of insects is ever increasing due to their fast adaptability to the rapidly changing environmental conditions. The physiology of insects plays a vital role in the adaptation and competing adjustments in the nature with other species. The mechanism of vision and the involvement of visual pigments, like chromophores particularly in flies, have proved to be landmarks in the field of research. This has been achieved with the discovery of novel pathways involved in the mechanism of pigment development. However, certain visual pigments and their relationship with various chromophores need to be further elaborated. The role of insect pigments in vision, to identify the hosts, prays, and predators, is also discussed. Many naturally occurring pigments of insect origin are continuously being explored for better prospects and human welfare. The abundant availability of insect species all over the world and the never ending task of exploring their potential at morphological, physiological, evolutionary, and genetic levels have a tremendous potential to explore the subject like entomology

Air Bearing and its Stability

Bearing are machine element that allow components to move with respect to each other. A little consideration will shows that some part of power wasted in overcoming the frictional resistance and due to the contact of surfaces large amount of wear and tear takes place between the contacted surfaces. Hence to avoid wear and tear in sliding contact bearing and to reduce frictional resistance the thin layer of fluid is introduced which is called as lubricant. Air bearing are introduced to reduce such frictional resistance and wear of sliding contact bearings. Air bearings are bearings that use a thin film of pressurized air to provide low frictional load bearing interfaces between surfaces. There is a small gap between two surfaces i.e. two surfaces do not touch. As these bearings are contact free various problems in traditional bearing like friction, wear, particulates, and lubricant handling are avoided. There are advantages like precision positioning, such as lacking backlash and static friction as well as in high speed application. Other than this characteristics, stability is also important factor in air bearing

Bursting Smoke as an Infrared Countermeasure

This paper describes the experimental setup for the evaluation of bursting smoke for anti-infrared role using SR-5000 spectroradiometer and a source of IR radiation (8-13 micrometer) using cadmium-mercury-telluride (CMI) detector cooled by liquid nitrogen. The particle size and shape of the powders used in the bursting smokes were determined microscopically using Carl Zeiss Jena Neophot- 21. Highest attenuation of 97 -lOO percent was produced for about 12 s using a mixture of bronze flakes and chaff, and for about 8 s using a mixture of bronze copper lined flakes, bronze flakes and chaff