Birla Institute of Technology, Mesra

About: Birla Institute of Technology, Mesra is a education organization based out in Ranchi, India. It is known for research contribution in the topics: Dielectric & Microstrip antenna. The organization has 2801 authors who have published 4789 publications receiving 52426 citations. The organization is also known as: BIT.

Acclimatization of tissue cultured plantlets: from laboratory to land

Abstract: The ultimate success of micropropagation on a commercial scale depends on the ability to transfer plants out of culture on a large scale, at low cost and with high survival rates. During field transfer the in vitro grown plantlets are unable to compete with soil microbes and to cope with the environmental conditions. The in vitro culture conditions result in the plantlets with altered morphology, anatomy and physiology. In order to increase growth and reduce mortality in plantlets at the acclimatisation stage, efforts are focused on the control of both physical and chemical environment and biohardening of micropropagated plantlets. This review describes the abiotic and biotic stresses and current developing methods for the acclimatization of microshoots.

Polyaniline/silver nanocomposites: Dielectric properties and ethanol vapour sensitivity

Abstract: Polyaniline/silver (PANI/Ag) nanocomposites were prepared by in-situ oxidative polymerization of ani-line monomer in the presence of different concentrations of Ag nanoparticles. The formation of PANI/Agnanocomposite was characterized by UV–vis spectroscopy, energy dispersion X-ray (EDX) and transmis-sion electron microscopy (TEM). TEM images showed that the particle size increased with increasing Agconcentrationinthecomposite,owingtotheaggregationeffect.TheACconductivityanddielectricprop-erties of pure PANI and PANI/Ag nanocomposites were measured in the frequency range of 10 3 –10 6 Hz.Higherconductivity,dielectricconstantanddielectriclossofPANI/AgnanocompositesthanthoseofpurePANIwereobserved.TheconductivityofthenanocompositesincreasedwithincreasingAgconcentration.The gas-responses of the PANI/Ag nanocomposite towards low concentrations of ethanol was examinedand compared with that of the pure PANI. The nanocomposite was found to possess superior ethanolsensing capacity compared to pure PANI and it showed linear relationship between the responses andthe ethanol and/or Ag concentration. The Fourier transform infrared (FT-IR) spectroscopy was used toexplain the sensing mechanism.© 2009 Elsevier B.V. All rights reserved.

Review of vision-based steel surface inspection systems

Abstract: Steel is the material of choice for a large number and very diverse industrial applications. Surface qualities along with other properties are the most important quality parameters, particularly for flat-rolled steel products. Traditional manual surface inspection procedures are awfully inadequate to ensure guaranteed quality-free surface. To ensure stringent requirements of customers, automated vision-based steel surface inspection techniques have been found to be very effective and popular during the last two decades. Considering its importance, this paper attempts to make the first formal review of state-of-art of vision-based defect detection and classification of steel surfaces as they are produced from steel mills. It is observed that majority of research work has been undertaken for cold steel strip surfaces which is most sensitive to customers' requirements. Work on surface defect detection of hot strips and bars/rods has also shown signs of increase during the last 10 years. The review covers overall aspects of automatic steel surface defect detection and classification systems using vision-based techniques. Attentions have also been drawn to reported success rates along with issues related to real-time operational aspects.