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Search Results: 1 - 10 of 2722 matches for " Ravi Shrivastava "
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Assessment of bone condition by acoustic emission technique: A review  [PDF]
Sharad Shrivastava, Ravi Prakash
Journal of Biomedical Science and Engineering (JBiSE) , 2009, DOI: 10.4236/jbise.2009.23025
Abstract: The paper deals with the review of acoustic emission technique in biomedical field. The re-view is done with the aim to provide an overview of the use of AE technique in biomedical field, mainly concentrated on the AE behavior of bone under different loading conditions, its depend-ence on strain rate, in osteoporosis, monitoring the fracture healing process of bone. The over-all conclusion from the review was that almost all the studies in bone indicated that the initial AE occurs only in the plastic region and just prior to yield. That means the use of AE tech-nique for clinical application cannot be consid-ered as a safe technique, but the early occur-rence of AE events from callus promises the application of AE technique for monitoring the fracture healing process. The negligible effect of soft tissues on AE response of bone prom-ises AE to become a non-invasive method for assessment of bone condition.
Ravi Shrivastava
Journal of Pharmaceutical and Scientific Innovation , 2013,
Abstract: Presence of free Herpes Simplex Virus (HSV) particles in the vaginal cavity and consequent continuous infection of new healthy cells delay the recovery from Genital herpes (GHSV). As the HSV envelop contains several surface proteins and since some plant tannins have a strong affinity for these proteins, we incorporated specific tannins into an osmotically active solution to evaluate clinical efficacy.60 women having visible lesions of genital herpes were treated with RPEX (10ml per day) for 14 consecutive days. Product was administered daily into the vaginal cavity and the symptoms of GHSV were evaluated before treatment and on days 1 (2 h), 4, 7, and 14. Smears from GHSV lesions were also collected to evaluate the number of virus-loaded multinucleated giant cells using Tzanck test. Data were analyzed using CFR21 USFDA software and SAS9.1.3. statistical program.The mean amount of free virus was diminished by nearly 17%, 44%, 65%, and 100% on days 1, 4, 7, and 14, respectively, with a corresponding reduction in the size of the lesions, and complete recovery on day 14.HSV surface glycoprotein inhibitors incorporated into an osmotically active solution represents a new approach to treat GHSV.
TL Glow Curve Study, Kinetics, PL and XRD Analysis of Mn2+ Doped CaAl2O4 Phosphors  [PDF]
Jagjeet Kaur, Nemana Subramanyam Suryanarayana, Beena Jaykumar, Vikas Dubey, Ravi Shrivastava, Huma Nazli Baig
Journal of Minerals and Materials Characterization and Engineering (JMMCE) , 2012, DOI: 10.4236/jmmce.2012.1111114
Abstract: The present paper reports Thermoluminescence (TL) Glow curve of Mn2+ doped CaAl2O4 phosphor with different UV exposure time. The Glow peak shows general order kinetics and evaluation of kinetic parameters was done by peak shape method. Calculations of Trap Depth were done with Chen’s different methods and order of kinetics, activation energy and frequency factor are calculated. The recorded glow curve shifts towards higher temperature with increasing intensity as a function of UV exposure time until 30 minutes where it is seen that the peak shifts towards low temperature side and intensity also decreases. The peaks were found at 345?C, 356.83?C, 358?C and 356.73?C respectively using the heating rate 6.7?C/s. The PL (photoluminescence) excitation spectra show peaks at 248 nm and 362 nm whereas emission spectra shows peaks between 364 nm and 551 nm. Sample was characterized by XRD technique.
Beam Dynamics and Electromagnetic Design Studies of 3 MeV RFQ for SNS Programme  [PDF]
Rahul Gaur, Purushottam Shrivastava
Journal of Electromagnetic Analysis and Applications (JEMAA) , 2010, DOI: 10.4236/jemaa.2010.29068
Abstract: The physics design of a 3 MeV, 30 mA, 352.2 MHz Radio Frequency Quadrupole (RFQ) is done for the future Indian Spallation Neutron Source (ISNS) project at RRCAT, India. The beam dynamics design of RFQ and the error analysis of the input beam parameters are done by using standard beam dynamics code PARMTEQM. The electromagnetic stu-dies for the two-dimensional and three-dimensional cavity design are performed using computer codes SUPERFISH and CST Microwave Studio. The physics design of RFQ consisting of the beam dynamics design near the beam axis and the electromagnetic design for the RFQ resonator is described here.
Electron Beam Effects on Kinetic Alfven Waves in the Plasma Sheet Boundary Layer  [PDF]
G. Shrivastava, J. Shrivastava
Open Access Library Journal (OALib Journal) , 2014, DOI: 10.4236/oalib.1100518
Abstract: This work studies the effect of earthward electron beam on kinetic Alfven wave in plasma sheet boundary layer (PSBL). The particle aspect approach is adopted to investigate the trajectories of charged particles in the electromagnetic field of kinetic Alfven wave. Expressions are found for the dispersion relation, growth/damping-rate and associated currents in the presence of electron beam in homogenous plasma. Kinetic effects of electrons and ions are included to study kinetic Alfven wave because both are important in the transition region. The plasma parameters appropriate to plasma sheet boundary layer are used. It is found that downward electron beam affects the dispersion relation, growth/damping-rate and associated currents in both cases (warm and cold electron limit).
Fighting Uncertainty with Uncertainty: A Baby Step  [PDF]
Ravi Kashyap
Theoretical Economics Letters (TEL) , 2017, DOI: 10.4236/tel.2017.75097
Abstract: We can overcome uncertainty with uncertainty. Using randomness in our choices and in what we control, and hence in the decision making process, we could potentially offset the uncertainty inherent in the environment and yield better outcomes. The example we develop in greater detail is the news-vendor inventory management problem with demand uncertainty. We briefly discuss areas, where such an approach might be helpful, with the common prescription, “Don’t Simply Optimize, Also Randomize; perhaps best described by the termRandoptimization”. 1) News-Vendor Inventory Management; 2) School Admissions; 3) Journal Submissions; 4) Job Candidate Selection; 5) Stock Picking; 6) Monetary Policy. This methodology is suitable for the social sciences since the primary source of uncertainty is the members of the system themselves and presently, no methods are known to fully determine the outcomes in such an environment, which perhaps would require being able to read the minds of everyone involved and to anticipate their actions continuously. Admittedly, we are not qualified to recommend whether such an approach is conducive for the natural sciences, unless perhaps, bounds can be established on the levels of uncertainty in a system and it is shown conclusively that a better understanding of the system and hence improved decision making will not alter the outcomes.
Shrivastava Bhanu,Shrivastava Vandana,Shrivastava Archana
International Research Journal of Pharmacy , 2011,
Abstract: A species of parasite protozoa Entamoeba histolytica causing amoebiasis and amoebic dysentery characteristic include a single nucleus containing a small central karyosome and peripheral chromatin that is finely and regularly beaded. This is a single celled parasitic animal, that infects predominantly humans and other primates. Amoebic infection was first described by Fedor Losch in 1875 in St. Petersburg. In 1890, Sir William Osler reported the first North American case of amoebiasis when he observed amoebae in stool in abscess fluid from physician who previously resided in Panama. So we used the Lemon juice (Citrus ) at different concentration against Entamoeba histolytica to treat the amoebiasis disease. Entamoeba histolytica shows the variety of growth due to the effect of Lemon juice (Citrus). Lemon juice is ingredient and it has antiamoebic properties against Entamoeba histolytica a causative agent of amoebiasis.
Shrivastava Bhanu,Shrivastava Vandana,Shrivastava Archana
International Research Journal of Pharmacy , 2011,
Abstract: Typhoid fever is a prolonged and debilitating fever which is of major public health concern in many countries.Laboratory diagnosis of typhoid fever requires isolation and identification of Salmonella enterica serotype Typhi. In many areas where this disease is endemssssic, laboratory capability is limited. Recent advances in molecular immunology have led to the identification of sensitive and specific markers for typhoid fever and technology to manufacture practical and inexpensive kits for their rapid detection. Three commercial kits for serologic diagnosis of typhoid fever. Patients presenting with 4 days of fever were enrolled at two hospitals. Patients with serotype Typhi isolated from blood samples, and controls were patients with other laboratory-confirmed illnesses. This paper described following methods for diagnosis in case of typhoid fever, Laboratory analysis. (i) Blood culture (ii) Confirmation and antimicrobial susceptibility testing of isolates (iii) Investigation of stool culture (iv) Widal test. (v) Rapid tests (vi) A polymerase chain reaction (PCR)-based test.
A Study Of Achievement In English Of Boys & Girls Of Government & Non-government School At Middle Level
Pallavi Shrivastava
Golden Research Thoughts , 2013, DOI: 10.9780/22315063
Abstract: "Language in its widest sense means the sum total of such signs of our thoughts and feeling as are capableof external perception as could be produce and repeated at will."A.H. Gardiner.
Plant Tissue Culture : An Overview
Shrivastava S.
Pharmaceutical Reviews , 2007,
Abstract: Plant tissue culture, the growth of plant cells outside an intact plant, is a technique essential in many areas of the plant sciences. It relies on maintaining plant cells in aseptic conditions on a suitable nutrient medium. The culture can be sustained as a mass of undifferentiated cells for an extended period of time or regenerated into whole plants.Because plant cell culture is not affected by changes in environmental conditions, improved production may be available in any place or season. Therefore, studies on the production of useful metabolite by plant cell culture have been carried out on an increasing scale since the end of the 1950's. Their results stimulated more recent studies on the industrial application of this technology in many countries. However, there are still a few barriers that must be overcome before commercialization of many other products can occur. To overcome barriers hindering industrial application of plant cell cultures, however, it is required to conduct more fundamental research, including elucidation of biosynthetic pathways of many useful secondary metabolites in plants and mechanisms for their biosynthesis, collaboration with a number of researchers in other scientific fields is also very helpful. In this review, the background of research on plant cell culture, various approaches to improve the productivity of secondary metabolites and different techniques are discussed.
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