Influence of Prominent Temperature on the Compressive Strength of Self Compacting Concrete

In an extensive research scenario, the self-compacting concrete influence a major role in the advanced construction technology which gives the higher impact on its strength and durability of the structure, for its assessment there were various types of physical and chemical testing techniques are available. In this article the work represents the compressive strength of self-compacting concrete in various temperature testing like 200o C and 400 o C with the consideration of 100% cement and different mix proportion of admixtures for the replaceable of cement like Fly-ash with 30% and 15% and GGBFS 30% and 15% and the addition of polypropylene fibre with 1% and 2% with all of its mix proportion. The fundamental tests of the concrete are performed as per the Indian Standard code. The results indicate that an enhancement of compressive strength at the maximum optimized temperature.

Investigation of Ultrasonic Testing Failure in ERW Line Pipe of API 5L X52M Grade

Electric resistance welding (ERW) is conventional manufacturing technology for production of linepipe. ERW is known for its low cost, high efficiency & reliability. Investigation was performed on Electric Resistance Welded (ERW) pipes having Ultrasonic Test (UT) indication observed during in-process inspection. The location of indication was adjacent to weld fusion line. The study was done on pipe size 168 mm (6.6 inch) outside diameter and 6.4 mm wall thickness of API 5L X52M grade to verify the cause of UT failure related to pipe manufacturing process and/or steel making process. The samples were drawn from UT indicated area and analysis is carried out by chemical testing, optical microscopy and scanning electron microscopy with energy dispersive spectroscopy. From systematical research by Why-Why analysis, it is clear that the reason of sub-surface defects on ERW pipe is due to presence of non-metallic inclusions. On the basis of the composition of observed non metallic inclusion, possible sources are identified. The countermeasures for each source cause were verified and successfully implemented the affected one.

Novel Growth Age Characterization for Fresh Herbal Ginseng Based on Quantitative Counting of the Calcium Oxalate Crystals through FEG-ESEM

To reveal the accumulation of the calcium oxalate crystals (COH Crystals) during the growth and development of the taproot of Panax ginseng, and develop a novel and rapid characterization method to evaluate the growth age of commercial ginseng, multiple methods in micro characterization techniques of SAXS, Micro-CT, FEG-ESEM and Micro-Raman were used to identify the COH Crystals and establish a quantitative counting method for growth age identification. In this study, a cross-analysis with multiple methods proved for the first time with a Raman and Energy spectrum that the high-density particles widely distributed in the parenchyma cells of the xylem and cortex are COH Crystals; we also first realized quantitative counting of the COH Crystals on the cross-section of fresh ginseng samples. Moreover, catering to the testing requirements of the modern trading of fresh ginseng products, we also specifically established an interesting and useful mathematical equation (Y = 2.3797X − 1.2404) for growth age identification. The technology and strategy in this study effectively compensated for the shortcomings of chemical testing and other methods in technical limitations; hence, the application of more ginseng varieties to perform the technical optimization is expected.

DETERMINATION OF THE SAFETY OF IRRADIATED PRODUCTS BY THE CONTENT OF QUINONES

The result of research, conducted using our immuno-chemical testing system (Reaction of Indirect Hemaglutination) shows that application of radiation exposure to farming and agro products in dosages needed for prolongation of their storage lifetime, for prevention of rotting and germination or for decontamination of feed-stuff from natural microflora and insects; leads to increase in radiotoxins contents thereof with maximums reached on 7-15 days. Besides, traces of radiotoxins in reaction of indirect hemaglutination depend on type of product, radiation dosage and time of product storage after radiation treatment.

Assessing behavioural and physiological responses of three aquatic invertebrates to tributyltin and atrazine in a multi-species, early warning biomonitoring technology

Recent global events and anthropogenic changes to the natural environment have raised concerns about the quality of drinking water consumed by the public throughout the world. Traditional chemical testing is slow and is not performed for all possible contaminants, necessitating the development of innovative new technology to detect and mitigate threats to human health. The development of a multi-species, early-warning biomonitoring technology, based on behavioural and physiological changes in aquatic organisms, greatly furthers this goal. In this study, changes in movement behaviour and respiration rates were examined in three aquatic species, Daphnia magna, Hyalella azteca and Lumbriculus variegates, exposed to varying concentrations of TBT and atrazine, using digital video analysis and direct oxygen measurement. Different parameters of movement were examined and evaluated for inclusion in a multi-species, early-warning biomonitoring technology and the utility of incorporating these parameters into a model to determine classes and concentrations of various contaminants is discussed. An evaluation of whether or not direct measurement of oxygen consumption rates is feasible and useful for inclusion in a multi-species, early-warning biomonitoring technology is also discussed.

Assessing behavioural and physiological responses of three aquatic invertebrates to tributyltin and atrazine in a multi-species, early warning biomonitoring technology

Recent global events and anthropogenic changes to the natural environment have raised concerns about the quality of drinking water consumed by the public throughout the world. Traditional chemical testing is slow and is not performed for all possible contaminants, necessitating the development of innovative new technology to detect and mitigate threats to human health. The development of a multi-species, early-warning biomonitoring technology, based on behavioural and physiological changes in aquatic organisms, greatly furthers this goal. In this study, changes in movement behaviour and respiration rates were examined in three aquatic species, Daphnia magna, Hyalella azteca and Lumbriculus variegates, exposed to varying concentrations of TBT and atrazine, using digital video analysis and direct oxygen measurement. Different parameters of movement were examined and evaluated for inclusion in a multi-species, early-warning biomonitoring technology and the utility of incorporating these parameters into a model to determine classes and concentrations of various contaminants is discussed. An evaluation of whether or not direct measurement of oxygen consumption rates is feasible and useful for inclusion in a multi-species, early-warning biomonitoring technology is also discussed.