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Search Results: 1 - 10 of 2550 matches for " Charu Chandra "
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Thin Film Deposition by Langmuir Blodgett Technique for Gas Sensing Applications  [PDF]
Sanit Malik, Chandra Charu Tripathi
Journal of Surface Engineered Materials and Advanced Technology (JSEMAT) , 2013, DOI: 10.4236/jsemat.2013.33031
Abstract:

There are various technologies like CVD. Radio Frequency sputtering, spin coating etc. present for thin film deposition for various applications and for gas sensors. In this review, special attention is focused on the thin film deposition for gas sensing applications by using Langmuir Blodgett method. Langmuir Blodgett method also discussed briefly. Modified technique of Langmuir-Blodgett like Langmuir Schaefer method is discussed and various examples of Langmuir Blodgett techniques for gas sensing for space applications are included. Future prospects of gas sensing thin film deposition by Langmuir Blodgett technique are explained.

Corrosion Response of Ti6Al4V and Ti15Mo Dental Implant Alloys in the Presence of Listerine Oral Rinse
Rahul Bhola,Charu Chandra,Faisal M. Alabbas,Sukumar Kundu,Brajendra Mishra,David L. Olson
International Journal of Corrosion , 2013, DOI: 10.1155/2013/739841
Abstract: The influence of a commonly used antibacterial mouth rinse, Listerine, on the corrosion behavior of one of the commonly used titanium alloys Ti6Al4V (two-phase structure, i.e., α and β) and a newer Ti15Mo (single β phase) in normal saline solution has been investigated using electrochemical techniques. Interfacial electrochemical changes occurring at the oxide-solution interface have been analysed using EIS circuit modeling. Listerine acts as a corrosion inhibitor for Ti15Mo alloy and a corrosion promoter for Ti6Al4V alloy. 1. Introduction Listerine is a commonly used mouth rinse with antiplaque, anticaries, and antibacterial properties. It is used in several dental applications following periodontal procedures and routine oral prophylaxis. It was awarded the American Dental Association’s seal of recognition in 1987 for its clinical efficacy in plaque control and gingival improvement [1]. Listerine antiseptic, developed by Warner-Lambert, was the first over-the-counter mouth rinse [2]. Listerine contains different essential oils, which are phenolics such as thymol, eucalyptol, menthol, and methyl salicylate and are known to retard plaque buildup and reduce gingivitis [3–10]. Thymol, eucalyptol, and menthol are known to possess proven antibacterial activity and are found in thyme (Thymus vulgaris), eucalyptus (Eucalyptus globulus), and peppermint (Mentha piperita), respectively. Methyl salicylate has anti-inflammatory activity and is found in meadowsweet (Filipendula ulmaria) and willow (Salix spp.) [2]. The effect of Listerine on plaque was ascribed to its bactericidal properties related to the alteration of bacterial cell wall, which has been well documented in vitro and in vivo [11–15]. A newly inserted prosthesis and various surrounding tissues may get exposed to Listerine from minutes to days, depending upon the therapy performed and the local and systemic patient factors. It is thus important to understand the effect of Listerine on the electrochemical and corrosion behavior of titanium alloys in order to predict treatment prognosis. Cestarolli et al. [16] have compared the effect of mouthwashes including Listerine and a simulated body fluid on the corrosion behavior of an Fe-Cr-Ni alloy. The corrosion resistance of this alloy was the highest in the presence of Listerine mouthwash. However, the present study simulates the use of Listerine as an oral prophylactic rinse, in other words, the condition when the concentration of saliva gets altered due to the presence of Listerine in the mouth. The effect of this normal saline-Listerine solution has,
Antifungal Potential of Transition Metal Hexacyanoferrates against Fungal Diseases of Mushroom  [PDF]
Charu Arora Chugh, Dipti Bharti
Open Journal of Synthesis Theory and Applications (OJSTA) , 2012, DOI: 10.4236/ojsta.2012.13005
Abstract: Ferrocyanides of Co(II), Ni(II), Cu(II), Zn(II) and Cd(II) were synthesized and characterized by IR spectra, magnetic susceptibility, thermal gravimetric analysis, elemental analysis and X ray diffraction studies. Antimicrobial potential of these complexes have been evaluated. Antifungal screening of these complexes has been carried out against Mycogone perniciosa and Verticillium fungicola causing wet and dry bubble diseases of button mushroom respectively. Nickel ferrocyanide has been found to be most effective against Mycogone perniciosa with 60% inhibitory effect while cadmium ferrocyanide has exhibited significant potential of 85% against Verticillium fungicola.
Impact of Smoking on Serum Immunoglobulin G Levels in Patients with Periodontitis  [PDF]
Charu Shrestha, Ashita Uppoor, Dilip Nayak
Open Journal of Immunology (OJI) , 2014, DOI: 10.4236/oji.2014.43009
Abstract:

Tobacco smoking has been found to be a major environmental factor associated with generalized forms of severe periodontitis. Altered serum and gingival crevicular fluid inflammatory cytokine profiles, immune cell function, and altered proteolytic regulations are noticed in smokers. These observations are not consistent, and to date, there has been no clear mechanism to explain how smoking may affect periodontal disease. Hence, the present study was undertaken to assess the impact of smoking on serum immunoglobulin G (IgG) levels in smokers with periodontitis and its potential role as a risk indicator of the disease process. 40 subjects (15 smokers and 15 non-smokers with chronic periodontitis, 10 healthy controls) were included in the study. Smoking history was assessed according to a standardized interview and a questionnaire, Fagerstom Test for Nicotine Dependence. Serum immunoglobulin IgG was estimated with immunoturbidimetric assay. IgG levels were significantly decreased with longer duration of smoking. In addition levels of serum IgG were significantly lower in smokers compared to non-smokers with chronic periodontitis and healthy controls (P < 0.001). Current observations indicate that cigarette smoking may be associated with the suppression of B-cell function and immunoglobulin production. The alteration of antibody levels further explains the potential mechanism by which smoking exacerbates periodontal disease. Further studies at the molecular level may highlight the specific mechanism by which tobacco can interact with cells of the immune system and its impact on periodontal disease process. Additional controlled, longitudinal studies may expound the significance of serum antibodies as potential markers for periodontal disease.

Duality in Solving Multi-Objective Optimization (MOO) Problems  [PDF]
Chandra Sen
American Journal of Operations Research (AJOR) , 2019, DOI: 10.4236/ajor.2019.93006
Abstract: Multi-Objective Optimization (MOO) techniques often achieve the combination of both maximization and minimization objectives. The study suggests scalarizing the multi-objective functions simpler using duality. An example of four objective functions has been solved using duality with satisfactory results.
Rational use of cetuximab in the treatment of advanced non-small cell lung cancer
Charu Aggarwal, Hossein Borghaei
OncoTargets and Therapy , 2009, DOI: http://dx.doi.org/10.2147/OTT.S4761
Abstract: tional use of cetuximab in the treatment of advanced non-small cell lung cancer Review (4626) Total Article Views Authors: Charu Aggarwal, Hossein Borghaei Published Date August 2009 Volume 2009:2 Pages 251 - 260 DOI: http://dx.doi.org/10.2147/OTT.S4761 Charu Aggarwal, Hossein Borghaei Department of Medical Oncology, Fox Chase Cancer Center, Philadelphia, PA, USA Abstract: Lung cancer is the leading cause of mortality in the United States. Non-small cell lung cancer (NSCLC) accounts for approximately 85% of all lung cancers. Most NSCLC patients present with loco-regionally advanced or metastatic disease where response rates are low and median overall survival approximates 8 to 10 months. Chemotherapy is the mainstay of treatment for NSCLC patients with metastatic disease. Epidermal growth factor receptor (EGFR) and family of receptors play a critical role in lung cancer tumorigenesis. Cetuximab, a monoclonal antibody that binds the EGFR, has demonstrated preclinical and clinical activity against NSCLC. This review focuses on the use of cetuximab in NSCLC.
Comparative study of various Techniques Employ in Image Steganography
Preeti Singh,Charu Pujara
International Journal of Engineering and Advanced Technology , 2012,
Abstract: The staggering growth in communicationtechnology and the usage of internet allows the huge transfer ofdata over it but because of various security threats data can betampered by the intruders. Various cryptography techniques aredeveloped for secure transmission over the internet, anotherpractical approach of hiding secret information from intrudersover the web is Steganography. Steganography is a technique ofhiding covert data inside an image. Various techniques arediscussed below for hiding data and each of them have some oftheir own limitations. This paper comprises of four sections.Section 1 gives a brief introduction about Steganography. Section2 Steganograpy Techniques, Section 3 Analysis of SteganographyTechniques, Section 4 Conclusion and future scope.
Performance Analysis of Adaptive Blind Equalizers Algorithms
Charu Sharma,Kapil Gupta
International Journal of Electronics Communication and Computer Technology , 2012,
Abstract: In this paper, we discuss the performance of Blind Equalization algorithms, which can deal with the cases that the input signals are correlated and decrease the filtering error. We describe the algorithm process and analysis the error performance and computational complexity and an example of adaptive blind equalization is given to verify these algorithms. Results and conclusions are made which may be benefit to the researchers and engineers in the adaptive filtering field.
Research in Retrieving Concrete Image from the Blurred Image
Ashutosh Singhal,Charu Jain?
International Journal of Computer Science and Mobile Computing , 2013,
Abstract: Impulse noise is caused by errors in the data transmission generated in noisy sensors orcommunication channels, or by errors during the data capture from digital cameras. Noise is usuallyquantified by the percentage of pixels which are corrupted. Corrupted pixels are either set to the maximumvalue or have single bits flipped over. In some cases, single pixels are set alternatively to zero or to themaximum value. This is the most common form of impulse noise and is called salt and pepper noise.Nevertheless, other types of impulse noise are possible as well. This paper work is going to provide a new,faster, and more efficient noise reduction method for images corrupted with impulse noise. So the mainobjectives of this paper work is to get the almost actual image from the corrupted impulse noised image usingfuzzy logic i.e. image enhancement.
Rational use of cetuximab in the treatment of advanced non-small cell lung cancer
Charu Aggarwal,Hossein Borghaei
OncoTargets and Therapy , 2009,
Abstract: Charu Aggarwal, Hossein BorghaeiDepartment of Medical Oncology, Fox Chase Cancer Center, Philadelphia, PA, USAAbstract: Lung cancer is the leading cause of mortality in the United States. Non-small cell lung cancer (NSCLC) accounts for approximately 85% of all lung cancers. Most NSCLC patients present with loco-regionally advanced or metastatic disease where response rates are low and median overall survival approximates 8 to 10 months. Chemotherapy is the mainstay of treatment for NSCLC patients with metastatic disease. Epidermal growth factor receptor (EGFR) and family of receptors play a critical role in lung cancer tumorigenesis. Cetuximab, a monoclonal antibody that binds the EGFR, has demonstrated preclinical and clinical activity against NSCLC. This review focuses on the use of cetuximab in NSCLC.Keywords: cetuximab, lung cancer, monoclonal antibody
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