Entity

Time filter

Source Type


Palai G.,Gandhi Institute for Technological Advancement GITA | Tripathy S.K.,National Institute of Science and Technology NIST
Optics Communications | Year: 2012

A novel method to measure the concentration of sugar, sodium chloride and alcohol, in their aqueous solution by using two dimensional photonic crystal structures is presented. This measurement is very accurate as the principle is based on variation of photonic band gap with respect to concentration. Photonic band gap here is computed using plane wave expansion method. © 2012 Elsevier B.V. All rights reserved. Source


Rae A.,National Physical Laboratory United Kingdom | Stosch R.,Physikalisch - Technische Bundesanstalt | Klapetek P.,Czech Metrology Institute | Hight Walker A.R.,National Institute of Science and Technology NIST | Roy D.,National Physical Laboratory United Kingdom
Methods | Year: 2014

Raman spectroscopy is a powerful tool for the elucidation of qualitative and quantitative information from biological systems and has huge potential in areas such as biotechnologies, drug discovery, agro-chemical research and clinical diagnostics. This report summarises the principal Raman techniques applied to biomedical systems and discusses the challenges that exist to the wide spread adoption of Raman spectroscopy. © 2014 Elsevier Inc. Source


Panda A.,MKCG Medical College | Bhagat A.,National Institute of Science and Technology NIST
Biomedicine (India) | Year: 2013

Introduction: Drug promotional literature distributed by pharmaceutical companies is an important source of prescribing information to the doctor and they attempt to raise awareness about a new drug (1). Ideally, the drug promotional literature should provide relevant research findings regarding the drug. Aim: To evaluate the quality, adequacy and genuineness of information provided by drug promotional literature distributed by pharmaceutical companies in India. Materials and Methods: 735 drug promotional literatures (leaflets) were collected from the outpatient Department of M.K.C.G Medical College, Berhampur, Odisha, India and from 10 busy physicians of Berhampur town from their private clinics. They were analyzed using a pre-tested and pre-validated checklist with nine parameters representing the quantitative analysis methods. The WHO criterion for ethical medicinal drug promotion was used for the analysis of the adequacy of coverage. The genuineness of therapeutic claims made in promotional literature was verified by accessing standard literature through internet databases like PubMed, Medline and Cochrane reviews, standard text books and peer reviewed journals. Mention of the information regarding the cost of the drug in the promotional literature was also evaluated. Results: Out of the 735 leaflets of drug promotional literature collected the quantitative research methods were mentioned in 83 (11.29%,C.I9.0% to 13.58%). None ofthe drug promotional literature fulfilled all the 11 WHO criteria for drug promotional literature. The brand name was mentioned in all the drug promotional literature whereas generic name was found in 98.77%. 63.8% of the leaflets satisfied the six WHO criteria namely, the brand name, generic name, dosage form, approved therapeutic use, name and address of the manufacturer and reference to scientific literature as appropriate. 1525 claims were made in 735 drug promotional literature (2.07 per literature). 76.33% claims were supported with scientific references. 67% references were available on PubMed, Medline, Cochrane reviews, standard text books and peer reviewed journals. Only 31% of the claims were authentic. Conclusion: Drug promotional literatures analyzed through this study were inadequate in terms of their quality, adequacy and genuineness of coverage. Hence, it can be concluded that majority of the drug promotional literature may not help rational prescribing, but only promote the drug and have commercial interests. They overlook the set guidelines related to drug promotional literature. Source


Bunday B.,SEMATECH | Germer T.A.,National Institute of Science and Technology NIST | Vartanian V.,SEMATECH | Cordes A.,SEMATECH | Cepler A.,SEMATECH
Proceedings of SPIE - The International Society for Optical Engineering | Year: 2013

This paper will examine the future for critical dimension (CD) metrology. First, we will present the extensive list of applications for which CD metrology solutions are needed, showing commonalities and differences among the various applications. We will then report on the expected technical limits of the metrology solutions currently being investigated by SEMATECH and others in the industry to address the metrology challenges of future nodes, including conventional CD scanning electron microscopy (CD-SEM) and optical critical dimension (OCD) metrology and new potential solutions such as He-ion microscopy (HeIM, sometimes elsewhere referred to as HIM), CD atomic force microscopy (CD-AFM), CD small-angle x-ray scattering (CD-SAXS), high-voltage scanning electron microscopy (HV-SEM), and other types. A technical gap analysis matrix will then be demonstrated, showing the current state of understanding of the future of the CD metrology space. © 2013 SPIE. Source


Palai G.,Gandhi Institute for Technological Advancement GITA | Tripathy S.K.,National Institute of Science and Technology NIST | Sahu T.,National Institute of Science and Technology NIST
Optik | Year: 2014

We propose a novel technique to measure the concentration of sucrose in PAm-hydrogel sucrose solution using two dimensional photonic crystal structures consists of air holes. PAm-hydrogel is an organic hydrogels, which is used as biomedical applications. The principle of measurement is based on the linear variation of photonic band gap with the change of dielectric constant of the solution infiltrated in air holes of photonic crystal structure. Plane wave expansion method is used to find the band gap and linear variation (R 2 = 0.9949) of photonic band gap with respect to sucrose concentration is observed. Besides this, an excellent linear variation (R 2 = 0.9949) of transmitted intensity of light with respect to sucrose concentration is also seen. Since the simulation is based on optical principle, it gives accurate results. This suggests the possible use of 2-D photonic crystal structure as a sucrose sensor. Experimental procedure for measuring the concentration of sucrose is also mentioned. © 2013 Elsevier GmbH. Source

Discover hidden collaborations