α-Fe2O3 Nanoparticles: An Efficient, Inexpensive Catalyst for the one-pot Preparation of 3,4-dihydropyrano[c]chromenes

This paper describes the combustion synthesis of α-Fe2O3 nanopowder at much lower temperature and its catalytic activity for the one-pot preparation of 3,4-dihydropyrano[c]chromenes. The combustion derived α-Fe2O3 nanopowder was characterized by powder X-ray diffraction (PXRD), Braunauer, Emmett and Teller (BET) surface area, scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FTIR). Highly efficient, three-component condensation of aromatic aldehyde, malanonitrile and 4-hydroxycoumarin catalyzed by α-Fe2O3 nanoparticles at room temperature is described. The method offers an excellent alternative to the synthesis of 3,4-dihydropyrano[c]chromenes. The reactions are rapid, clean, and the products with good yield and high purity

Comparison of Thrombolysis in Myocardial Infarction Score and Heart Score in risk stratification of acute myocardial infarction patients, prognostic accuracy and arrhythmia incidence

Background: To compare TIMI & HEART SCORE for their risk stratification in Acute Myocardial Infarction Patients,  prognostic accuracy and Arrhythmia incidence.Methods: This observational study is conducted in a Tertiary care hospital over a period of 2 years from August 2017 to July 2019. A total of 100 patients presented to ER with Chest Pain are selected for study. Patients were monitored for a period of one month in ICCU.Results: In present study out of 61 cases with TIMI score ≥5, mortality of 11.5%(7 cases, p value 0.028). Heart score more than 6  constitutes high risk group, out of which mortality was observed in 7.45% cases (p=0.48). Most of the arrhythmias (70.49%) in present study observed in patients with TIMI score ≥5 (High risk group) which is statistically significant with p value 0.002. Most of the arrhythmias in present study observed in patients with HS ≥8 which is not statistically significant with p value 0.135.Conclusions: In present study, overall mortality rate was 7% and these patients who died constitutes to high risk group with TIMI. HEART SCORE identified more patients as low risk compared to TIMI SCORE. TIMI SCORE is a good predictor of arrhythmia incidence

Food Choice Motives among the Students of a Dental Institution in Mysore City, India

Background: In pursuit of a more gholistich dentistry and an increasing focus on promoting oral health, dental students are increasingly being trained to take a more active part in health promotion and education. In particular, this incorporates an emphasis on diet and educating people to eat in more healthy ways.Aim: This paper works from the premise that if dental students are toengage in oral health promotion, they will do so more effectively if they have first explored their own food choice motivations. Subjects and Methods: A descriptive, cross.sectional questionnaire study. The food choice questionnaire (FCQ) was distributed to a comparative  group of 1st and 5th year dental students in timetabled lecture slots. The FCQ is a previously validated measure designed to assess ten main factors relevant to peoplesh food choices. The data was analyzed using SPSS version 18.0 (Chicago, IL, USA) using descriptive statistics and  independent sample t-test.Results: Nearly 77% (122/159) students responded. Findings were  analyzed using independent sample t-test. Results indicated statistically significant differences in terms of food choice motivations between male and female students of 1st and 5th year.Conclusion: Awareness and an understanding of the differences in  motivational factors affecting food choice between dental students is important as they are increasingly taught to play an active role in oral health promotion. Keywords: Africa, Food, Oral healt

Nano ZnO and its Perspective in Anti-Cancer Activities

Several methods are used to counter the deadly disease cancer. Zinc oxide nanoparticles (ZnO NPs) is one of the metal oxide nanoparticles which had been used in anti-cancer activities due to its large bandwidth and high exciting binding energy and it has potential applications like antibacterial, antifungal, anti-diabetic, anti-inflammatory, wound healing, antioxidant, optic properties and also which holds promise to treat cancer effectively. Studies have shown that Zinc metal oxide nano particles induce cytotoxicity in cancer cells. The mechanism for antitumor could work through apoptosis or the generation of reactive oxygen species or and necrosis, among other possibilities. This review is on some of the most significant antitumor results obtained with zinc oxide nanoparticles depending on their size, surface morphology, methods of preparation and also cytotoxicity result

Ion beam-induced luminescence and photoluminescence of 100 MeV Si8+ ion irradiated kyanite single crystals

lonoluminescence (IL) of kyanite single crystals during 100 MeV Si8+ ion irradiation has been studied in the fluence range 1.87-7.50 x 10(11) ions/cm(2). Photoluminescence (PL) of similar dimensional crystals was recorded with same ions and energy in the fluence range 1 x 10(11) -5 x 10(13) ions/cm(2) with an excitation of 442 non He-Cd laser beam. A sharp IL and broad PL peaks at similar to 689 and 706 run were recorded. This is attributed to luminescence centers activated by Fe2+ and Fe3+ ions. It is observed that up to a given fluence, the IL and PL peak intensities increase with increase of Si8+ ion fluence. The stability of the chemical species was Studied on with and without irradiated samples by means of FT-IR spectroscopy. The results confirm that the O-Si-H type bonds covering on the surface of the sample. This layer might be acting as a protective layer and there by reducing the number of non-radiative recombination centers. (c) 2008 Elsevier Ltd. All rights reserved

SPATIAL MINING SYSTEM FOR DISASTER MANAGEMENT

Information Systems enable us to capture up to date effects due to disaster .It has been widely recognized that spatial data analysis capabilities have not kept up with the need for analyzing the increasingly large volumes of geographic data of various themes that are currently being collected and archived. Our analysis is on disaster management through  spatial Maps. Intelligent application algorithms ideal for finding the rules and unknown information from the vast quantities of computer data. The Intelligence system is to obtain and process the data, to interpret the data, and to design the algorithms for decision makers (Health Companion) as a basis for action. Spatial Map for disaster identification is designed. The Intelligence in each of these algorithms are provided the point and multi-point decision making system to capacitive for evaluation of spreading the dengue. Our contribution in this paper is to design Spatial Maps for Dengue

NETWORK ARCHITECTURE TO IDENTIFY SPATIAL KNOWLEDGE FOR DENGUE

Recent developments in informationtechnology have enabled collection and processing of vast amounts of personaldata, business data and spatial data. It has been widely recognized thatspatial data analysis capabilities have not kept up with the need for analyzingthe increasingly large volumes of geographic data of various themes that arecurrently being collected and archived. Our study is carried out on the way toprovide the mission-goal strategy (requirements) to predict the disaster. Theco-location rules of spatial data mining are proved to be appropriate to designnuggets for disaster identification and the state-of-the-art and emergingscientific applications require fast access of large quantities of data. Hereboth resources and data are often distributed in a wide area networks withcomponents administrated locally and independently, a framework has beensuggested for the above. Our contribution in this paper is to design networkarchitecture for disaster identification

Experimental and Theoretical Evaluation of the Stability of True MOF Polymorphs Explains Their Mechanochemical Interconversions.

We provide the first combined experimental and theoretical evaluation of how differences in ligand structure and framework topology affect the relative stabilities of isocompositional (i.e., true polymorph) metal-organic frameworks (MOFs). We used solution calorimetry and periodic DFT calculations to analyze the thermodynamics of two families of topologically distinct polymorphs of zinc zeolitic imidazolate frameworks (ZIFs) based on 2-methyl- and 2-ethylimidazolate linkers, demonstrating a correlation between measured thermodynamic stability and density, and a pronounced effect of the ligand substituent on their stability. The results show that mechanochemical syntheses and transformations of ZIFs are consistent with Ostwald's rule of stages and proceed toward thermodynamically increasingly stable, more dense phases.Support for calorimetry was provided by the U.S. Department of Energy, Grant DE-SC0016573. We acknowledge the financial support of the NSERC Strategic Grant STPGP 463405-14. A.D.K. acknowledges support by the FRQNT Postdoctoral Scholarship. We are grateful for computational support from the UK national high performance computing service, ARCHER, for which access was obtained via the UKCP consortium and funded by EPSRC Grant Ref EP/K013564/1

Synthesis, Characterization of Nano MnO2 and its Adsorption Characteristics Over an Azo Dye

ABSTRACT Nano MnO2 powder was synthesized by low temperature solution combustion method using oxalyl dihydrazide (ODH) fuel. The final product was well characterized by Powder X-ray diffraction (PXRD), Fourier Transform Infrared Spectroscopy (FTIR) and Scanning electron microscopy (SEM) for crystallographic purity, phase formation and surface morphology respectively. PXRD results show that pure MnO2 was synthesized at 300 0 C with no other impurities. SEM micrograph shows the product has highly porous structure with large voids, typical of combustion derived material. An adsorption characteristic of the porous MnO2 was studied over direct green dye (DG). The optimum dose of MnO2 for removal of 10 ppm DG azo dye was found to be 0.4 g L -1