Effect of UV Exposure on Coir-epoxy Infused Particulate Composite

Photo degradation mainly occurs in the lignin which is responsible for the colour changes. The surface becomes richer in cellulose content as the lignin degrades. In contrast to lignin, cellulose is much less prone to UV degradation. The effect of accelerated UV-aging on properties of coir-epoxy infused particulate composites has been studied. Composites are prepared by the hand layup technique at room temperature (25°C). Composites containing 15%particulates were subjected to accelerate UV-aging in a QUV weatherometer for 24 hrs. The results showed that coir-epoxy infused particulate composites displayed good UV resistance with regard to mechanical properties. The color of the coir-epoxy infused particulate composite changed from dark brown to light brown at the exposed area because of the formation of a thin, strongly degraded surface layer. Differential scanning calorimetry (DSC), X-ray diffraction (XRD), thermogravimetric analysis (TGA) and scanning electron microscopy (SEM) were also carried out to assess the changes occurring during accelerated weathering. These results show the deterioration of the epoxy matrix leading to crystallization. A decrease in epoxy melting temperature was also noted, due to molecular chain scission and the formation of extraneous groups, such as carbonyls and amine

NATURAL FLAVONOIDS: A NOVEL APPROACH TO BREAST CANCER (REVIEW)

ABSTRACTCancer is a hereditary disease and is caused due to the abnormal growth of the cells. Cancer can be of many forms but the most prevalent is the breast cancer. Breast cancer is the most common among women and can be treated by radiation therapy, surgery, hormone therapy, chemotherapy and natural therapy. The present review presents an overview about the role of flavonoids in curing cancer. This review gives a detailed account of classification of flavonoids. The in vivo and in vitro studies show the action of flavonoids on cancer. Various natural flavonoids can be extracted and can be used for various therapeutic effects apart from cancer.Keywords: Flavonoids, Cancer, Breast Cancer, Classification of flavonoids.Â

NATURAL FLAVONOIDS: A NOVEL APPROACH TO BREAST CANCER (REVIEW)

Cancer is a hereditary disease and is caused due to the abnormal growth of the cells. Cancer can be of many forms but the most prevalent is the breast cancer. Breast cancer is the most common among women and can be treated by radiation therapy, surgery, hormone therapy, chemotherapy and natural therapy. The present review presents an overview about the role of flavonoids in curing cancer. This review gives a detailed account of classification of flavonoids. The in vivo and in vitro studies show the action of flavonoids on cancer. Various natural flavonoids can be extracted and can be used for various therapeutic effects apart from cancer.Keywords: Flavanoids , Cancer, Breast Cancer, Classification of flavanoid

SCREENING OF PHYTOCHEMICALS AND BIOACTIVE COMPOUNDS IN PUNICA GRANATUM PEEL TO EVALUATE ITS HEMATOLOGICAL POTENTIAL

Pomegranate has been found to have ethnomedical history and is a rich reservoir of phytochemicals. The present study was carried out for phytochemical analysis in the hydroalcoholic pomegranate peel extracts. Presently phytochemical analysis and analysis of bioactive compounds are done, the pomegranate peel extracts are found to have carbohydrates, alkaloids, flavonoids, steroids, tannic acids and phenolic compounds. The antioxidant activity, DPPH free radical scavenging activity, nitric oxide radical scavenging activity was analyzed. For good health the quality of blood should be maintained and for this antioxidants may be the key so as to protect the blood from oxidative stress. Thus from the present study it is concluded that pomegranate peel is a rich source of phytochemicals and bioactive compounds such as antioxidants and so can be used for various pharmaceutical and therapeutic purposes like increase in hemoglobin count. Keywords: pomegranate peel, antioxidant activity, DPPH free radical scavenging, nitric oxide radical scavenging, hemoglobin booster

NATURAL FLAVONOIDS: A NOVEL APPROACH TO BREAST CANCER (REVIEW)

Cancer is a hereditary disease and is caused due to the abnormal growth of the cells. Cancer can be of many forms but the most prevalent is the breast cancer. Breast cancer is the most common among women and can be treated by radiation therapy, surgery, hormone therapy, chemotherapy and natural therapy. The present review presents an overview about the role of flavonoids in curing cancer. This review gives a detailed account of classification of flavonoids. The in vivo and in vitro studies show the action of flavonoids on cancer. Various natural flavonoids can be extracted and can be used for various therapeutic effects apart from cancer.Keywords: Flavanoids , Cancer, Breast Cancer, Classification of flavanoid

Eco-friendly alternatives for the removal of heavy metal using dry biomass of weeds and study the mechanism involved

Abstract Metal contamination issues are becoming increasing day by day common in India and elsewhere, with many documented cases of metal toxicity in mining industries, foundaries, smelters, coal-burning power plants and agriculture. Heavy metals, such as cadmium, copper, lead, chromium and mercury are major environmental pollutants, particularly in areas with high anthropogenic pressure causing increased depositions of heavy metals in the terrestrial and aquatic environment. The release of these pollutants without proper treatment poses a significant threat to both environment and public health, as they are non biodegradable and continual. Thus, their treatment becomes inevitable and in this endeavor, absorption seems to be a promising alternative for treating metal contaminated waters. In the present study two plants, one macrophyte Eichhornia crassipes and other terrestrial Canna indica are used as adsorbents to study the process of biosorption. The studied plants have not gained much importance and are found in abundance in the Indian climate. Also the former has been declared as a weed and its management has become a great problem so with the study the plants can be better and further utilized for wastewater treatment for the removal of metal ions and other impurities. For the present study multi species solution of four heavy metals i.e. cadmium, chromium, lead and zinc are tested for the adsorption by the selected bio sorbent. This technology out-performs its predecessors not only due to its cost effectiveness but also in being eco-friendly i.e., where other alternatives fail

Extraction Optimization of Tinospora cordifolia

Objective. To optimize the conditions for the extraction of alkaloid palmatine from Tinospora cordifolia by using response surface methodology (RSM) and study its anticancerous property against 7,12-dimethylbenz(a)anthracene (DMBA) induced skin carcinogenesis in Swiss albino mice. Methods. The effect of three independent variables, namely, extraction temperature, time, and cycles was investigated by using central composite design. A single topical application of DMBA (100 μg/100 μL of acetone), followed 2 weeks later by repeated application of croton oil (1% in acetone three times a week) for 16 weeks, exhibited 100 percent tumor incidence (Group 2). Results. The highest yield of alkaloid from Tinospora cordifolia could be achieved at 16 hours of extraction time under 40°C with 4 extraction cycles. Alkaloid administration significantly decreases tumor size, number, and the activity of serum enzyme when compared with the control (Group 2). In addition, depleted levels of reduced glutathione (GSH), superoxide dismutase (SOD), and catalase and increased DNA damage were restored in palmatine treated groups. Conclusion. The data of the present study clearly indicate the anticancer potential of palmatine alkaloid in DMBA induced skin cancer model in mice

Effective Utilization Of An Aquatic Weed In An Eco-friendly Treatment Of Polluted Water bodies

World\u2019s most troublesome aquatic weed water hyacinth ( Eichhornia crassipes ) has been studied for its tendency to accumulate the heavy metal contaminants present in water bodies. A thorough chemical investigation has shed light on the fact that it accumulates heavy metals like Lead (Pb), Chromium (Cr), Zinc (Zn) and Manganese (Mn) to a large extent. The presence of higher concentration of these metals in the aquatic weed signifies bio-magnification that lead to filtration of metallic ions from polluted water. The concept that water hyacinth can be used as a natural aquatic treatment system in the uptake of heavy metals is explored

Influence of coolant temperature on the performance of a four stroke spark ignition engine employing a dual circuit cooling system

Diesel engines have attracted attention because of their higher thermal efficiency and lower carbon dioxide emissions than gasoline engines.  On the other hand, oxides of nitrogen (NOx) and particulate matter (PM) in the exhaust from diesel engines are difficult to be reduced simultaneously because a decrease in one is likely to result in an increase in the other.  In this paper, an attempt has been made to compare the effect of the heat lost to the coolant in the cylinder block, and in the cylinder head with a conventional cooling circuit with corresponding effects in an engine with a dual cooling circuit.  A dual cooling circuit employs separate cooling circuits for the cylinder block, and for the cylinder head.  A single cylinder, four-stroke, water cooled, naturally aspirated spark ignition engine test rig was developed for the purpose.  The influences of the cylinder block and cylinder head temperatures on brake specific fuel consumption (bsfc) and on exhaust emissions were measured.  The results show that raising the temperature of the coolant in the engine block can produce significant improvements in bsfc with a corresponding reduction in the hydrocarbon (HC) emissions.  Similarly, lowering the coolant temperature in the cylinder head can increase the knock limit of the engine with a corresponding reduction in the levels of NOx in the exhaust emissions.   The objective of this investigation was to access the magnitude of the likely benefits of the dual circuit cooling system.Keywords: dual circuit cooling system, spark ignition engine, heat transfer, engine cooling Citation: Rehman A., R. M. Sarviya, S. Dixit, and R. K. Pandey.  Influence of coolant temperature on the performance of a four stroke spark ignition engine employing a dual circuit cooling system.  Agric Eng Int: CIGR Journal, 2010, 12(1): 84-90.&nbsp

Power productivity enhancement using performance analysis of biomass gasifier at energy park, RGTU Bhopal (MP, India)

 Abstract: The concept paper represents possible opportunities for strategic investment in remote area development and further due attention is paid to determine its feasibility.  We examined the status and performance of biomass gasification unit for electricity generation fuelled by woody biomass installed at Energy Centre, Rajiv Gandhi Technological University Bhopal, (India).  The main objective of the research project is to utilize the resources of existing biomass feedstock and make performance analysis under purpose of fulfilling the electrical demand of Energy Centre Rajiv Gandhi Technological University Bhopal (India) and rural users in powering of their home lighting, by means of renewable energy.  The results of the work will be useful for the future engineering development of biomass gasification unit power generation technologies.Keywords: biomass, gasification, co-generation, pyrolysis, combustion, India