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Wyświetlanie 1-11 z 11
Tytuł:
Synthesis, Geometry optimization, Mulliken, MEP, HOMO-LUMO and NLO properties of 2-aryl-3-(2,6-diisopropylphenyl)thiazolidin-4-one based on DFT calculations
Autorzy:
Rameshkumar, R.
Santhi, N.
Powiązania:
https://bibliotekanauki.pl/articles/1178248.pdf
Data publikacji:
2018
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
FT-IR
HOMO–LUMO
Thiazolidin-4-one
hyperpolarizability
Opis:
A novel compounds 2-(substitutedphenyl)-3-(2,6-diisopropylphenyl)thiazolidin-4-one (8-12) were synthesized and characterized with the aid of spectral techniques. The molecular geometry of synthesized compound was calculated in the ground state by density functional theory (DFT/B3LYP) using 6-31G(d,p) basis set. The Mulliken and MEP analyses confirm the reactive sites in the designed compounds. The calculated HOMO and LUMO energies were used to analyze the charge transfer within the molecule. The electrical dipole moment (μ) and first hyperpolarizability (βo) values have been computed using DFT/B3LYP method. The higher first order hyperpolarizability of 12 found to be 1.20 x10-30 esu indicating its use as non-linear optical (NLO) material.
Źródło:
World Scientific News; 2018, 91; 59-72
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Performance Measure of a New One-Step Numerical Technique via Interpolating Function for the Solution of Initial Value Problem of First Order Differential Equation
Autorzy:
Fadugba, Sunday Emmanuel
Okunlola, Joseph Temitayo
Powiązania:
https://bibliotekanauki.pl/articles/1178790.pdf
Data publikacji:
2017
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Initial value problem
Interpolating function
One-step numerical technique
Opis:
This paper presents the development of a new one-step numerical technique for the solution of initial value problems of first order differential equations by means of the interpolating function. The interpolating function used in this paper consists of both polynomial and exponential functions. Numerical experiments were performed to determine the efficiency and robustness of the scheme. The results show that the scheme is computationally efficient, robust and compares favourably with exact solutions.
Źródło:
World Scientific News; 2017, 90; 77-87
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A One-step Extended Block Hybrid Formulae for Solving Orbital Problems
Autorzy:
Olaoluwa, Omole Ezekiel
Lukman, Momoh Adelegan
Powiązania:
https://bibliotekanauki.pl/articles/1065135.pdf
Data publikacji:
2019
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
A-Stable
Extended Block Hybrid Formulae
One-step
Orbital Problems
Zero Stability
Opis:
A One-step Extended Block Hybrid Formulae (OEBHF) for solving Orbital problems is presented. The processes compute the solutions of Orbital Problems in a block by block fashion by some discrete schemes obtained from the associated continuous schemes and its first derivatives which are combined and implemented as a set of block formulae. The analysis of the method was examined, it was found to be zero stable, consistence, convergent and A-stable. The order, error constants and the region of absolute stability was also investigated, MATLAB package was used to plot the region of stability within which the method is stable. Numerical results revealed this method to be efficient and very accurate, and especially suitable for orbital problems.
Źródło:
World Scientific News; 2019, 120, 2; 192-204
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
One-pot three component (LaCl3•7H2O) catalysed biginelli reaction for the synthesis of 1,2,3,4-tetrahydropyrimidine
Autorzy:
Murugesan, C.
Sihabudeen, M. Mohamed
Ahamed, A. Asrar
Powiązania:
https://bibliotekanauki.pl/articles/1190119.pdf
Data publikacji:
2016
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
2
3
4-tetrahydropyrimidine; one pot synthesis
Multicomponent reaction; Biginelli reaction; 1
Opis:
A Series of tetrahydropyrimidine has been derived by LaCl3•7H2O catalysed one pot three component biginelli reaction. The compounds have synthesised from an aldehyde, ethyl acetoacetate and urea or thiourea in an ethanolic medium using a catalytic amount of (LaCl3•7H2O). This method provides quantitative yield and the catalysis can be easily recovered from the reaction medium and be re-used.
Źródło:
World Scientific News; 2016, 35; 87-99
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Synthesis and characterization of copper(II) complex of 3-methyl-2,6-diphenylpiperidin-4-one oxime
Autorzy:
Thirunarayanan, G.
Lakshmanan, K.
Powiązania:
https://bibliotekanauki.pl/articles/1076144.pdf
Data publikacji:
2019
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Complexation
Copper chloride
Piperidine-4-one
Piperidine-4-oneoxime
UV and IR spectra
Opis:
A novel six membered heterocyclic oxime namely 3-methyl-2,6-diphenylpiperidin-4-oneoxime was prepared from the condensation of 3-methyl-2,6-diphenylpiperidin-4-one and hydroxylamine hydrochloride. The obtained oxime was characterized by their physical, analytical and spectroscopic data. This oxime was utilized as ligand for preparation of the copper complex. The oxime belongs to bidentate ligand nature. The copper complex of this oxime was prepared by the conventional heating of ethanolic solution of this oxime and copper chloride pentahydrate. The obtained copper complex was analyzed by their physical constants, analytical, pH measurements, UV and IR spectral data. These physicochemical analysis results confirmed, the structure of the complex was octahedral.
Źródło:
World Scientific News; 2019, 116; 102-114
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Synthesis and characterization of novel 2-oxo-4-((4-(3-oxomorpholino)phenyl)amino)-2H-chromene-3-carbonitrile derivatives
Autorzy:
Jilariya, Krushnakumar J.
Chodvadiya, Vijay D.
Patel, P. K.
Babariya, Jayesh
Powiązania:
https://bibliotekanauki.pl/articles/1075711.pdf
Data publikacji:
2019
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
3-cyano-4chlor coumarin
4-(4-aminophenyl)morpholin-3-one
antimicrobial activity
Opis:
A highly functionalized heterocyclic library were synthesized, and characterized by common spectroscopic methods. This novel synthetic rout involves nucleophilic substitution reaction of 3-cyano-4chloro coumarin with 4-(4-aminophenyl)morpholin-3-one in the presence of base and methanol as a solvent in good yield and high purity. Key starting material 4-(4-aminophenyl)morpholin-3-one synthesized from aniline. The reaction of aniline with ethylene oxide gives INT-1 which on reaction with Chloroacetyl chloride yield INT-b. Nitration of INT-b gives INT-c, which on reduction with Sn/HCl gives int-D. Further INT-3 was synthesized from 4-hydroxy coumarin. The Vilsmeier-haack reaction of 4-hydroxy coumarin gives INT-01 which on reaction with hydroxylamine hydrochloride and sodium acetate furnished INT-03. All the synthesized compound of libraries characterized using 1H NMR, Mass, and IR spectroscopic technique.
Źródło:
World Scientific News; 2019, 119; 231-237
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
About the ways of wearing of one-edged swords in the Przeworsk and the Oksywie culture
Autorzy:
Rutkowski, Wojciech
Powiązania:
https://bibliotekanauki.pl/articles/1179540.pdf
Data publikacji:
2017
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
ancient weapon
experimental archaeology
one-edged sword
the Oksywie culture
the Przeworsk culture
Opis:
Sword is one of the most important identifiers of elite character of the burial in the Przeworsk Culture. The way of wearing double-edged sword is determined by scabbard slide and strap that passes through the slide. The side on which the sword was worn is also incontrovertible. More complicated dilemma can be observed while working on the interpretation of one-edged swords and their suspension system. In some cases there are preserved scabbard clasps and mounts still attached to the blade. This could happen when grave inventory was burnt together with sword hidden in its carrying case. By analysing the placement of the suspension rings with attached strap, we can get answers to such questions as: which side of the body was worn particular sword, what was its inclination towards the body and how high it was suspended. The sole interpretation of research results could give us incomplete view of the past. Running some tests with reconstructed artefacts could significantly influence and change final conclusions regarding analysed archaeological material.
Źródło:
World Scientific News; 2017, 76; 173-182
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Bioactive 3-methyl-2,6-diarylpiperidin-4-one, oxime and its copper(II) complex
Autorzy:
Thirunarayanan, G.
Lakshmanan, K.
Powiązania:
https://bibliotekanauki.pl/articles/1070862.pdf
Data publikacji:
2019
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Antimicrobial activities
Copper(II) complex
Disc diffusion
Drug dilution
Piperidine-4-one
Piperidine-4-oneoxime
Opis:
namely 3-methyl-2,6-diphenylpiperidin-4-oneoxime and copper(II) complex of this oxime was prepared by literature procedure. The purities of these ketone, oxime and copper complex was analyzed by physico-chemical and spectroscopic methods reported in the literature. The physicochemical analysis results confirmed that the structure of the complex was distorted octahedral. The antimicrobial activities of these substrates such as ketone, oxime and its copper complex were investigated using Bauer-Kirby disc diffusion technique against several antimicrobes by measuring the mm of zones of inhibitions. Further these activities were concluded using drug dilution method. From the analysis report, the copper (II) complex of the oxime shows significant antimicrobial activities against their antimicrobial stains. The oxime shows moderate antimicrobial activity. The ketone shows satisfactory antibacterial and antifungal activities against their stains in both disc diffusion and drug dilution methods.
Źródło:
World Scientific News; 2019, 123; 124-140
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Synthesis and characterization of novel 2-oxo-4-((4-(3-oxomorpholino)phenyl)amino)-2H-chromene-3-carbaldehyde derivatives
Autorzy:
Jilariya, Krushnakumar J.
Sanghani, Yogesh J.
Patel, P. K.
Babariya, Jayesh
Powiązania:
https://bibliotekanauki.pl/articles/1068631.pdf
Data publikacji:
2019
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
4-(4-aminophenyl)morpholin-3-one
4-chloro-2-oxo-2H-chromene-3-carbaldehyde
antimicrobial activity
Opis:
A highly functionalized heterocyclic library were synthesized, characterized and tested for biological evaluation against bacteria and fungus. This novel synthetic rout involves nucleophilic substitution reaction of 4-chloro-2-oxo-2H-chromene-3-carbaldehyde with 4-(4-aminophenyl) morpholin-3-one in the presence of base and methanol as a solvent in good yield and high purity. All the synthesized compound of libraries characterized using 1H NMR, Mass, and IR spectroscopic technique. Also all compound screened for antimicrobial activity against standard drugs.
Źródło:
World Scientific News; 2019, 132; 264-269
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Is the light velocity constant?
Autorzy:
dos Santos Godoi, Valdir Monteiro
Powiązania:
https://bibliotekanauki.pl/articles/1178301.pdf
Data publikacji:
2017
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Earth’s movement
Michelson
Special Relativity Theory
Venus
average
light velocity
one-way
principle of constancy of light velocity
radar
range of light velocities
Opis:
The pretension in this paper is to question the constancy of light velocity.
Źródło:
World Scientific News; 2017, 86, 3; 365-371
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Novel synthesis of 3-(((E)-benzylidene)amino)-5-((Z)-3,4-dimethoxybenzylidene)-2-phenyl-3,5-dihydro-4H-imidazol-4-one derivatives as potent antimicrobial agents
Autorzy:
Manawar, Rohit B.
Parmar, Mukesh B.
Nayaka, Indresh J.
Pandit, Brinda H.
Shah, Manish K.
Powiązania:
https://bibliotekanauki.pl/articles/1066261.pdf
Data publikacji:
2019
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
4H-imidazol-4-one
A. niger
Anti-fungal
Anti-microbial Agent
Bioactivity
C. albicans
E. coli
Elemental analysis
IR spectroscopy
Mass spectroscopy
NMR spectroscopy
P. aeruginosa
S. aureus
S. pyogenes
Opis:
Novel synthesis of 4H-imidazol-4-one derivative by reaction of (Z)-3-amino-5-(3,4 dimethoxybenzylidene)-2-phenyl-3,5-dihydro-4H-imidazol-4-one with derivative of different aromatic aldehydes and Salicyldehyde. New synthesized compound are thermally stable and neither air-nor moisture sensitive at RT. Successive library of synthesized compound characterized using IR, NMR, Elemental, Mass, and its antimicrobial activity study.
Źródło:
World Scientific News; 2019, 130; 42-70
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-11 z 11

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