Anand Aswar; Nilesh Govindrao Salunkhe; Chandrashekhar Arun Ladole; Nikita Vinod Thakare; Jagruti Manish Barabde
Abstract
In the present study, use of MgFe2O4@SiO2-SO3H as an efficient, green, magnetically recoverable & recyclable catalyst for micro-wave assisted solvent free synthesis of 2,3-dihydroquinazolin-4(1H)-ones reaction pathway is presented. The superiorities of this method are higher conversion rate, shorter ...
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In the present study, use of MgFe2O4@SiO2-SO3H as an efficient, green, magnetically recoverable & recyclable catalyst for micro-wave assisted solvent free synthesis of 2,3-dihydroquinazolin-4(1H)-ones reaction pathway is presented. The superiorities of this method are higher conversion rate, shorter reaction time, easy isolation of product and reusability of catalyst without remarkable loss of activity. The synthesized 2,3-dihydroquinazolin-4(1H)-ones derivatives were assessed for their antimicrobial and antifungal activity; where, the most of these compounds exhibit potent antibacterial and antifungal activities against various bacteria and fungi.
Composite Materials
Rajnish Raj; Pooja Lohia; D. K. Dwivedi
Abstract
The traditional melt-quench technique was used to synthesize non-oxide (Ga2Ge)100-x(Ga3Sb2)x (x = 15, 30, 45, 60) glass alloys. The vacuum thermal evaporation unit was used to obtain thin films of prepared sample for investigation of optical properties. SEM, XRD and DSC technique were used to find the ...
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The traditional melt-quench technique was used to synthesize non-oxide (Ga2Ge)100-x(Ga3Sb2)x (x = 15, 30, 45, 60) glass alloys. The vacuum thermal evaporation unit was used to obtain thin films of prepared sample for investigation of optical properties. SEM, XRD and DSC technique were used to find the thermal and structural properties of the materials. The linear properties like optical bandgap, extinction coefficient for prepared samples have been studied in present paper of Ge-Ga-Sb for application of optoelectronics. The impurities present in the prepared thin films were defined by FTIR transmittance spectra. The extinction coefficient (k) value decreases with increase in Sb concentration while absorption coefficient (α). It was noticed that value of energy bandgap (Eg) derived from Tauc’s plot varies from 2.9 eV to 1.25 eV. Urbach energy is inversely proportional to the bandgap of the materials. As the Sb concentration increases the band gap goes on decreases which result the increase in Urbach energy. Mott and Davis model has been used for explaining decrease in energy gap of prepared glassy alloys.
Nanomaterials & Nanotechnology
Praveena G; Mohammed E.M.; Viji C.; Shyam Kumar S.
Abstract
Nickel ferrite (NiFe₂O₄) nanoparticles were synthesized using the sol-gel auto combustion method, and the powdered samples were calcined at two temperatures, 100°C and 200°C. The structure of nickel ferrite nanoparticles was determined using X-ray diffraction (XRD) patterns. The nickel ferrite ...
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Nickel ferrite (NiFe₂O₄) nanoparticles were synthesized using the sol-gel auto combustion method, and the powdered samples were calcined at two temperatures, 100°C and 200°C. The structure of nickel ferrite nanoparticles was determined using X-ray diffraction (XRD) patterns. The nickel ferrite nanoparticle size was calculated using the Debye-Scherrer formula and was found to be 15.53 nm and 17.14 nm for 100 °Cand 200 °C. Field Emission Scanning Electron Microscopic (FESEM) analysis reveals that the samples exhibit spherical morphology with crystalline in nature and also show some agglomeration. The phase formation of nickel ferrite nanoparticles was further confirmed from the energy dispersive x-ray (EDAX) spectra which shows strong peaks for the existence of all the elements in it. The work investigates the magnetic properties of the samples and both the samples exhibit ferromagnetic behavior. The optical band gap obtained for the samples is 2.5 and 2.6 eV for N1 and N2 samples. The antimicrobial activity especially the anti-algal effect of NiFe₂O₄ nanoparticles on freshwater microalgae Chlorella pyrenoidosa in a dose-dependent manner is also reported.
Umeshwar Narayan; Amar Prakash Garg
Abstract
Candida is the most common yeast existing as normal flora of oral cavity. Sometime Candida yeast can cause diseases in the oral cavity. Immune system is weakened due to widespread use of antibiotic, immunosuppressive drugs, age, genetic, malnutrition and hormone disorder as well as HIV infection. ...
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Candida is the most common yeast existing as normal flora of oral cavity. Sometime Candida yeast can cause diseases in the oral cavity. Immune system is weakened due to widespread use of antibiotic, immunosuppressive drugs, age, genetic, malnutrition and hormone disorder as well as HIV infection. Immunocompromised person are more sensitive Aim of the study was to evaluate the prevalence of Candid yeast in those persons that are habitual of chewing gutka and non-habitual. For this study, 450 oral rinse samples were collected aseptically in sterile test tube. These persons visited in dental OPD, Kalka dental college, Meerut. Groups were divided on the bases of habitual and non-habitual of gutka chewer and further clinical history of patients was recorded such as age, gender and socioeconomic status. Each sample were diluted and inoculated on Sabouraud’s Dextrose Agar medium by spread culture technique. The samples were further processed for colony characterization and biochemical test to identify Candida species. As well as measurement of pH level of the oral rinse sample were recorded with pH strip method. 414 isolates were collected from 450 samples, eight Candida species were isolated. Candida albicans were observed as dominant yeast, showed creamy colored, smooth colonies on Sabouraud’s dextrose agar medium. And observed germ tube test, psuedohyphae chlamydospore and various sugars fermentation as well as some other Candida yeasts were also isolated.
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