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Wyświetlanie 1-15 z 137
Tytuł:
Antibacterial, antifungal, anti-oxidant, anti-inflammatory and anti-hypertensive activities of N-chloropyrazinamide
Autorzy:
Vaijayanthi, S. P.
Mathiyalagan, N.
Powiązania:
https://bibliotekanauki.pl/articles/412474.pdf
Data publikacji:
2014
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
antibacterial activity
antifungal activity
antioxidant activity
anti-inflammatory
anti-hypertensive activity
N-chloropyrazinamide
Opis:
N-chloropyrazinamide was prepared by the chlorination of pyrazinamide using trichloroisocyanuric acid. The experimental results ascertained that the tested N-chloropyrazinamide showed good antimicrobial activities when compared to standard drug. It was found that N-chloropyrazinamide at different concentrations exhibited significant dose dependent anti-oxidant, anti-inflammatory and anti-hypertensive activity.
Źródło:
International Letters of Chemistry, Physics and Astronomy; 2014, 7; 1-8
2299-3843
Pojawia się w:
International Letters of Chemistry, Physics and Astronomy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of municipal solid waste on bacteria population in soil
Autorzy:
Okpoitari, S.P.
Binaebi, A.
Powiązania:
https://bibliotekanauki.pl/articles/10871.pdf
Data publikacji:
2013
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
municipal solid waste
bacteria population
soil
variance analysis
heterotrophic bacteria
Nitrobacter
Opis:
The effect of municipal solid waste on bacteria (Heterotrophic bacteria & Nitrobacteria) population was determine by collecting 50g sample’s of various dumpsites, put in 2 kg buckets soil and kept in the green house to mimic the natural environment for six (6) weeks. Analysis of variance (ANOVA) and least significant difference (L.S.D) were effected on the data at 5 % probability level. The analysis shows significant effect, this seem to suggest that municipal solid waste influences Heterotrophic bacteria and Nitrobacter population in soils.
Źródło:
International Letters of Natural Sciences; 2013, 01
2300-9675
Pojawia się w:
International Letters of Natural Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Kinetics of oxidation of amino acids by a newly synthesized oxidant, N-chloropyrazinamide in aqueous acetic acid medium
Autorzy:
Vaijayanthi, S.P.
Mathiyalagan, N.
Powiązania:
https://bibliotekanauki.pl/articles/412132.pdf
Data publikacji:
2013
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
kinetics
oxidation
Mechanizm
amino acid
N-chloropyrazinamide
Opis:
The kinetics of oxidation of amino acids namely, alanine, glycine, leucine, phenyl alanine and valine by N-chloropyrazinamide (NCPZA) in aqueous acetic acid medium in the presence of hydrochloric acid have been investigated. The observed rate of oxidation is first order in [NCPZA], [H+] and [Clˉ]. The order with respect to [amino acid] is zero. The rate of oxidation increases with increase in the percentage of acetic acid. The reaction rate increases slightly with increase in ionic strength, while retards with addition of pyrazinamide. Arrhenius and thermodynamic activation parameters have been evaluated from Arrhenius plot by studying the reaction at different temperatures. A most probable reaction mechanism has been proposed and an appropriate rate law is deduced to account for the observed kinetic data.
Źródło:
International Letters of Chemistry, Physics and Astronomy; 2013, 11; 1-8
2299-3843
Pojawia się w:
International Letters of Chemistry, Physics and Astronomy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Synthesis and Characterization of Emulsion Polymerization of Acrylate Monomers
Autorzy:
Shukla, Sweta
Rai, J. S. P.
Powiązania:
https://bibliotekanauki.pl/articles/1159386.pdf
Data publikacji:
2018
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Acrylate
Coating
Copolymerization
Emulsion
Opis:
A recently developed successful approach to achieve the balance of properties involves the copolymerization of film forming monomers like acrylates and methacrylates. The copolymerization of acrylate based monomer having different alkyl group offers the opportunity to study the effect of the alkyl substituents on the polymer properties. The objective is to study their copolymerization behavior with acrylate or combination of acrylates of varying chemical nature using free radical initiator and to correlate the composition of the copolymers with their physical properties suitable for its use as coating on hard surfaces.
Źródło:
World Scientific News; 2018, 113; 78-86
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Taxonomic and Biochemical Studies of Piscean Nematode Camallanus jadhavii (Jadhav and Khadap, 2013) Parasitic in Wallago Attu (Bleeker, 1857)
Autorzy:
Bhure, Dhanraj Balbhim
Nanware, Sanjay Shamrao
Kardile, S. P.
Powiązania:
https://bibliotekanauki.pl/articles/1191362.pdf
Data publikacji:
2016
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Biochemical Content
Camallanus jadhavii
Taxonomical Content
Wallago attu
Opis:
Present study deals with taxonomical and biochemical studies of nematode parasite Camallanus jadhavii (Jadhav and Khadap, 2003) Pathan et.al., 2011 parasitic in Wallago attu (Bleeker, 1857). The normal intestinal tissue contains more glycogen (31.54 mg / 100 mg), protein (29.28 mg / 100 mg) and lipids (22.40 mg / 100 mg) as compared to infected intestinal tissue (29.12 mg / 100 mg, 28.02 mg / 100mg and 20.16 mg / 100 mg), whereas low biochemical content in nematode parasite Camallanus jadhavii (27.38 mg / 100 mg, 24.80 mg / 100 mg and 18.46 mg / 100 mg. Intestinal parasites were capable of extracting nutritious materials from their host and thus represented a high level in glycogen, protein and lipid.
Źródło:
World Scientific News; 2016, 34; 98-108
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Development of User Guide on Interactive Way-Finder and E-Notices System
Autorzy:
Ganiron Jr, Tomas U.
Manlutac, Karen B.
Castro, Monino S. P.
Jerusalem, Catherine R.
Powiązania:
https://bibliotekanauki.pl/articles/1059524.pdf
Data publikacji:
2019
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Announcement
interactive way finder
map locator
schedule
software engineering
wayfinding
Opis:
Time is everything and with people demanding everything to be faster with the little patient, working with old school conventional technology is losing out. The primary goals of this research are to understand the benefits of fast and easy access through the interactive touch screen way-finder. The Interactive Way-Finder and E-Notices on Display for University campus is a collaborative map locator using a touch screen monitor with kiosk, plotting schedule for the faculty and announcement display. the system is running smoothly, It is ready to be implemented and can be used by the beneficiary. A modified questionnaire was used to seek the needed data in evaluating the functionalities of the system. The criteria of evaluation of software quality were adapted in ISO/IEC 25010:2011.
Źródło:
World Scientific News; 2019, 128, 2; 363-390
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Synthesis and antimicrobal activities of some novel triazolo[1,5-a]pyrimidine derivatives
Autorzy:
Gami, S. P.
Vilapara, K. V.
Khunt, H. R.
Babariya, J. S.
Naliapara, Y. T.
Powiązania:
https://bibliotekanauki.pl/articles/412170.pdf
Data publikacji:
2014
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
5-amino-1,2,4-triazole
ketene dithioacetal
antimicrobial activity
triazolopyrimidine
Opis:
A convenient synthesis of substituted 1,2,4-triazolo[1,5-a]pyrimidine was carried out by the reaction of various ketene dithioacetals with 5-amino 1,2,4-triazole in methanol in presence of sodium methoxide. The newly synthesized compound were characterized by 1H NMR, 13C NMR, IR, MS, elemental analysis and screened for their antimicrobial activity against various strains of bacteria and fungi.
Źródło:
International Letters of Chemistry, Physics and Astronomy; 2014, 11, 2; 127-134
2299-3843
Pojawia się w:
International Letters of Chemistry, Physics and Astronomy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Infrared and 13C NMR Spectral Correlation Analysis of Some Substituted Oxazepin Based Ketone and Thione Derivatives with Hammett Constant
Autorzy:
Sathiyamoorthi, K.
Kamalakkannan, D.
Suresh, R.
Sakthinathan, S. P.
Arulkumaran, R.
Sundararajan, R.
Thirunarayanan, G.
Powiązania:
https://bibliotekanauki.pl/articles/1193044.pdf
Data publikacji:
2016
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Oxazepins
IR
13C NMR
Hammett constant
F and R parameter
Single and multi-regression analysis
Opis:
Single and multi-regression analysis was applied for the corrosion study of transmission of substituent effects on IR carbonyl stretching frequencies and 13C chemical shifts of some substituted oxazepin compounds. The substituent effects were estimated on the basis of results of the statistical analysis. The differences among the obtained regression coefficients were discussed in terms of the relative importance of the field, inductive and resonance effects of substituent.
Źródło:
World Scientific News; 2016, 58; 48-64
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Spatio-temporal distribution, abundance and diversity of zooplankton community structure in River Shasha, Southwestern Nigeria
Autorzy:
Adedeji, A. A.
Adesakin, T. A.
Oni, T. M.
Oyebamiji, S. P.
Olowogboyega, V. T.
Powiązania:
https://bibliotekanauki.pl/articles/1076780.pdf
Data publikacji:
2019
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Arthropoda
Cladocera
Copepoda
Ostracoda
Protozoa
Rotifera
Zooplankton
environmental condition and monitoring
eutrophication
Opis:
This study was carried-out to investigate the abundance and diversity of zooplankton in River Shasha, Southwest Nigeria. The zooplankton community constitutes an important component in the faunal composition of the water body. Samples were collected bi-monthly between February 2006 to February 2008, with a mind of capturing various seasons in the period of study, at two sampling stations (Ipetumodu and Edun-abon) established along River Shasha. A total number of 54 zooplankton species were identified, comprising of five classes, namely Rotifera (29 species), Ostracoda (8 species), Arthropoda (5 species), Copepoda (5 species), Protozoa (4 species) and Cladocera (3 species). The most abundant species were Brachionus, Lecane and Keratella recorded the highest distribution among the zooplankton observed during the sampling period. Among the Rotifers, Branchions patulus and Filina opoliensis were found abundant. Holopedium amazonicum and Scapholebris armata were predominant among the Cladoceras. Among the Copepods the dominant species was Ectocyclops phaleratus and Hemicypris ovate and Cypris subglobosa among Ostracoda. Among the Protozoa, Diffugia sp and Vorticella sp were observed. Ceratopogonid sp. was most dominant among Arthropoda. The density of zooplankton population was maximum during dry season (158702 Org/L) and minimum (12402 Org/L) during rainy season due to the different environmental conditions of the water bodies. The overall mean abundance of zooplankton population was in the following order: Rotifera > Protozoan > Arthropoda > Copepoda > Cladocera >Ostracoda. The few species of Zooplankton identified in River Shasha may reflect the moderate level of limit nutrient and there is need for regular monitoring of the waterbody to avoid the excess input of nutrients from domestic and agricultural waste that could lead to eutrophication.
Źródło:
World News of Natural Sciences; 2019, 24; 299-321
2543-5426
Pojawia się w:
World News of Natural Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Spectral correlation analysis of Hammett substituent constants and biological activities of some (E)-1-(4-phenoxyphenyl)-3-phenylprop-2-en-1-ones
Autorzy:
Kalyanasundaram, N.
Sakthinathan, S. P.
Suresh, R.
Kamalakkannan, D.
Joseph, S. J.
Vanangamudi, G.
Thirunarayanan, G.
Powiązania:
https://bibliotekanauki.pl/articles/412539.pdf
Data publikacji:
2014
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
substituted styryl 4-phenoxyphenylketones
UV-spectra
IR spectra
NMR spectra
Hammett constants
substituent effects
regression analysis and antimicrobial activities
Opis:
A series of aryl chalcones have been synthesized from 4-phenoxyacetophonone with various substituted benzaldehydes. The purity of all chalcones has been checked using their physical constants and spectral data. These spectral data have been correlated with Hammett substituent constants and F and R parameters using single and multi-linear regression analysis. From the results of statistical analysis, the effect of substituents on the above spectral data has been studied. The single parameter correlation with few Hammett constants and F and R parameters gave satisfactory correlation coefficients whereas all multiple correlations gave satisfactory correlation coefficients with Resonance, Field and Swain-Lupton’s parameters. The antimicrobial activities of all chalcones have been studied using Bauer-Kirby method.
Źródło:
International Letters of Chemistry, Physics and Astronomy; 2014, 9; 23-47
2299-3843
Pojawia się w:
International Letters of Chemistry, Physics and Astronomy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Spectral correlations and antimicrobial activities of some 1-pyrenyl chalcones
Autorzy:
Arulkumaran, R.
Vijayakumar, S.
Sundararajan, R.
Sakthinathan, S.P.
Kamalakkannan, D.
Suresh, R.
Ranganathan, K.
Rajakumar, P.R.
Powiązania:
https://bibliotekanauki.pl/articles/411776.pdf
Data publikacji:
2013
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
substituted styryl 1-pyrenyl ketones
UV spectra
IR spectra
NMR spectra
substituent effects
antimicrobial activities
Opis:
A series of 1-pyrenyl chalcones have been synthesized by Crossed-Aldol condensation of 1-acetylpyrene and substituted benzaldehydes. The purities of these chalcones have been checked by their physical constants, UV, IR, NMR and MASS spectral data. The spectral data of these chalcones have been correlated with Hammett sigma constants, F and R parameters using single and multi-linear regression analysis. From the results of statistical analysis, the effect of substituents on the spectral group frequencies have been discussed. The anti-microbial activities of these chalcones have been evaluated using Bauer-Kirby method.
Źródło:
International Letters of Chemistry, Physics and Astronomy; 2013, 5; 21-38
2299-3843
Pojawia się w:
International Letters of Chemistry, Physics and Astronomy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Correlation analysis of substituted 2-((phenyl amino)methyl)-1,2-dihydro-5-(3-methoxyphenyl)-1-phenyl-1,2,4-triazole-3-thiones
Autorzy:
Thirunarayanan, G.
Kamalkkannan, D.
Suresh, R.
Sakthinathan, S. P.
Sundararajan, R.
Arulkumara, R.
Manikandan, R.
Vanangamudi, G.
Sathiyendiran, V.
Powiązania:
https://bibliotekanauki.pl/articles/1194047.pdf
Data publikacji:
2015
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
1-2-4-triazole
Hammett constants
IR spectral
NMR spectral
Swain-Lupton’s parameters
correlation
multi-regression analysis
Opis:
A series of substituted 2-((phenyl amino)methyl)-1,2-dihydro-5-(3-methoxyphenyl)-1-phenyl-1,2,4-triazole-3-thione compounds were synthesized and examined their purities as per the literature. The IR spectra of νC=N, νC=S, νNH and νCOC frequencies and NMR chemical shifts (ppm) of δNH, δOCH3, δCH2, δC=N, δC=S, δOCH3 and δCH2 are also assigned. The assigned IR and both 1H NMR and 13C NMR spectral data have been correlated with Hammett substituent constants and Swain-Lupton’s parameters using single and multi-linear regression analysis. From the results of statistical analysis, the effect of substituents on the above spectral data has been studied.
Źródło:
World Scientific News; 2015, 12; 24-43
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Thionylchloride catalyzed aldol condensation: Synthesis, spectral correlation and antibacterial activities of some 3,5-dichloro-2-hydroxyphenyl chalcones
Autorzy:
Arulkumaran, R.
Vijayakumar, S.
Sundararajan, R.
Sakthinathan, S. P.
Kamalakkannan, D.
Suresh, R.
Ranganathan, K.
Vanangamudi, G.
Thirunarayanan, G.
Powiązania:
https://bibliotekanauki.pl/articles/411825.pdf
Data publikacji:
2012
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
chlorek tionylu
widma IR i NMR
korelacja Hammeta
aktywność antybakteryjna
wpływ podstawników
styrylo 3,5-dichloro-2-hydroksy fenylo ketony
thionyl chloride
styryl 3,5-dichloro-2-hydroxyphenyl ketones
IR and NMR spectra
Hammett correlation
substituent effects
antimicrobial activities
Opis:
A series of substituted styryl 3,5-dichloro-2-hydroxyphenyl ketones [1-(3, 5-dichloro-2-hydroxy)- 3-phenylprop-2-en-1-one] were synthesized using thionyl chloride assisted Crossed Aldol reaction. The yields of chalcones were more than 80%. The synthesized chalcones were characterized by analytical and spectroscopic data. From the spectroscopic data the group frequencies were correlated with Hammett substituent constants, F and R parameters. From the results of statistical analysis the effect of substituents were discussed. The antibacterial activities of these chalcones have been evaluated using Bauer-Kirby method.
Źródło:
International Letters of Chemistry, Physics and Astronomy; 2012, 4; 17-38
2299-3843
Pojawia się w:
International Letters of Chemistry, Physics and Astronomy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Assessment of substituent effects and antimicrobial activities of some 2ʹ,5ʹ-dimethyl phenyl chalcones
Autorzy:
Joseph, S. J.
Kamalakkannan, D.
Arulkumaran, R.
Sakthinathan, S. P.
Suresh, R.
Sundararajan, R.
Vijayakumar, S.
Ranganathan, K.
Vanangamudi, G.
Thirunarayanan, G.
Powiązania:
https://bibliotekanauki.pl/articles/412597.pdf
Data publikacji:
2014
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
substituted styryl 2
5ʹ-dimethyl phenyl chalcones
UV spectra
IR spectra
NMR spectra
substituent effects
antimicrobial activities
Opis:
Some 2ʹ,5ʹ-dimethyl phenyl chalcones have been synthesized by Crossed-Aldol condensation between 2,5-dimethyl acetophenone and various substituted benzaldehydes using catalytic amount of sodium hydroxide and ethanol. The yields of the chalcones are more than 93 %. The purities of these chalcones have been checked by their physical constants, UV, IR, NMR and MASS spectral data. The spectral data of these chalcones have been correlated with Hammett sigma constants, F and R parameters using single and multi-linear regression analysis. From the results of statistical analysis, the effects of substituents on the spectral group frequencies have been discussed. The anti-microbial activities of these chalcones have been evaluated using Bauer-Kirby method.
Źródło:
International Letters of Chemistry, Physics and Astronomy; 2014, 5; 99-123
2299-3843
Pojawia się w:
International Letters of Chemistry, Physics and Astronomy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Electrochemical reduction potential correlation of some insect antifeedant potent 2-phenothiazinyl chalcones
Autorzy:
Ranganathan, K.
Suresh, R.
Kamalakkannan, D.
Arulkumaran, R.
Sundararajan, R.
Sakthinathan, S. P.
Vijayakumar, S.
Thirumurthy, K.
Mayavel, P.
Thirunarayanan, G.
Powiązania:
https://bibliotekanauki.pl/articles/411842.pdf
Data publikacji:
2012
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
elektrochemia
potencjał redukcji
analiza korelacji
2-phenothiazenyl
chalkony
2-Phenothiazenyl chalcones
electrochemistry
reduction potential
correlation analysis
insect antifeedant activities
Opis:
A series containing twelve substituted styryl 2-phenothiazenyl ketones have been synthesized. The electrochemical potentials of carbonyl and vinyl groups were measured. These potentials are correlated with Hammett substituent constants, F and R parameters. From the results of statistical analyses, the effects of substituent on the group reduction potentials have been discussed. The insect antifeedant activities of these chalcones have been studied using 4th instar larvae Achoea Janata L with castor leaf discs.
Źródło:
International Letters of Chemistry, Physics and Astronomy; 2012, 4; 66-75
2299-3843
Pojawia się w:
International Letters of Chemistry, Physics and Astronomy
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 137

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