Showing papers by "Deen Dayal Upadhyay Gorakhpur University published in 2006"
TL;DR: In this paper, a GC and GC-MS analysis of Foeniculum vulgare volatile oil showed the presence of 35 components containing 96.4% of the total amount, the major component was trans-anethole (70.1%).
209 citations
TL;DR: In this paper, the antioxidant, antifungal, and antibacterial potentials of essential oil and acetone extract of Anethum graveolens L. were investigated in the present study, which showed excellent activity for the inhibition of primary and secondary oxidation products for rapeseed oil in comparision with butylated hydroxyanisole (BHA) and BHT, which were evaluated using peroxide, thiobarbituric acid, p-anisidine, and carbonyl values.
Abstract: The antioxidant, antifungal, and antibacterial potentials of essential oil and acetone extract of Anethum graveolens L. were investigated in the present study. The extract has shown excellent activity for the inhibition of primary and secondary oxidation products for rapeseed oil in comparision with butylated hydroxyanisole (BHA) and butylated hydroxytoluene (BHT), which were evaluated using peroxide, thiobarbituric acid, p-anisidine, and carbonyl values. The activity of extract was further confirmed using other antioxidant properties such as ferric thiocyanate method inlinoleic acid system, which reducing power and scavenging effect (%) on 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical. Using inverted Petri plate method, the volatile oil completely inhibited the growth of Fusarium graminearum at 6 μL dose. Moreover, using poison food technique, the essential oil was found to be highly effective for controlling the growth of Penicillium citrinum and Aspergillus niger. In antibacterial investigations, using agar well diffusion method, the extract has shown better activity for Staphylococcus aureus and Bacillus cereus in comparison with commercial bactericide. However, essential oil has shown better activity for Pseudomonas aeruginosa. Gas chromatographic-mass spectroscopy studies on essential oil resulted in the identification of 35 components, which account for the 98.9% of the total amount. The major component was carvone (55.2%) followed bylimonene (16.6%), dillapiole (14.4%), andlinalool (3.7%). The analysis of acetone extract showed the presence of 25 components, which account for 94.5% of the total amount. The major components were dill apiole (43.2%), linoleic acid (23.1%), trans-anethole (11.0%), 2-propanone, 1-(4-methoxyphenyl) (4.6%), carvone (3.1%), p-anisaldehyde (2.7%), and myristicin (1.5%). In conclusion, the results presented here show that dill essential oil could be considered as a source for natural antimicrobial, whereas its extract could be considered as an alternative source of natural antioxidant.
145 citations
TL;DR: Both oil and oleoresin could be used as an additive in food and pharmaceutical preparations after screening and were able to reduce the oxidation rate of the mustard oil in the accelerated condition at 60 degrees C in comparison with synthetic antioxidants.
Abstract: In the present study, chemical constituents of the essential oil and oleoresin of the seed from Carum nigrum obtained by hydrodistillation and Soxhlet extraction using acetone, respectively, have been studied by GC and GC-MS techniques. The major component was dillapiole (29.9%) followed by germacrene B (21.4%), β-caryophyllene (7.8%), β-selinene (7.1%), and nothoapiole (5.8%) along with many other components in minor amounts. Seventeen components were identified in the oleoresin (Table 2) with dillapiole as a major component (30.7%). It also contains thymol (19.1%), nothoapiole (15.2.3%), and γ-elemene (8.0%). The antioxidant activity of both the essential oil and oleoresin was evaluated in mustard oil by monitoring peroxide, thiobarbituric acid, and total carbonyl and p-anisidine values of the oil substrate. The results showed that both the essential oil and oleoresin were able to reduce the oxidation rate of the mustard oil in the accelerated condition at 60 °C in comparison with synthetic antioxidants...
144 citations
TL;DR: The molluscicidal activity of dried root latex powder of Ferula asafoetida, flower-bud powder of Syzygium aromaticum and seed powder of Carum carvi against the snail Lymnaea acuminata was found to be both time and concentration dependent.
104 citations
TL;DR: In this article, the antifungal activities of coriander oil and its oleoresin against eight fungi were evaluated using the inverted petriplate and food poison tech- niques.
Abstract: Gas chromatography-mass spectrometry (GC-MS) analysis of the seed oil of coriander (Coriandrum sativum) showed the presence of 52 components, accounting for 98.45% of the total oil. The major components were linalool (75.30%), geranyl acetate (8.12%) and α-pinene (4.09%). Its oleoresin showed the presence of 28 components. Oleic acid (36.52%), linoleic acid (33.2%) and palmitic acid (11.05%) were the major components. The antifungal activities of coriander oil and its oleoresin against eight fungi were evaluated using the inverted petriplate and food poison tech- niques. Using the inverted petriplate method, the essential oil was found to be highly active against Curvularia palliscens, Fusarium oxysporum, Fusarium moniliforme and Aspergillus terreus. In the case of the oleoresin, more than 50% mycelial zone inhibition was obtained for the fungi Fusarium oxysporum, Aspergillus niger and Aspergillus terreus. Using the food poison technique, the essential oil showed 100% inhibition on the growth of A. terreus, A. niger, F. graminearum and F. oxysporum, whereas its oleoresin showed weaker fungitoxic activity, exhibiting 100% inhibition on the growth of F. oxysporum only. The oleoresin had a better antioxidant activity for sunflower oil than essential oil and synthetic anti- oxidants, BHA and BHT. The oil was also found to exert strong sprout suppressant activity (SSA) for potatoes. Copy- right © 2006 John Wiley & Sons, Ltd.
69 citations
TL;DR: In this paper, a GC and GC-MS analysis of fruit volatile oil of star anise (Illicium verum Hook) showed the presence of 25 components which account for 99.9% of the total amount.
Abstract: GC and GC-MS analysis of fruit volatile oil of star anise (Illicium verum Hook) showed the presence of 25 components which account for the 99.9% of the total amount. The major components were trans-anethole (94.37%), methyl chevicol (1.82%) and cis-anethole (1.59%). 15 Components were identified from its acetone extract accounting for 80.27% of the total amount. trans-Anethole (51.81%) was found as a major component along with linoleic acid (11.6%), 1-(4-methoxyphenyl)-prop-2-one (6.71%), foeniculin (5.29%) and palmitic acid (1.47%). Using an inverted petriplate method, the volatile oil completely inhibited the growth of Fusarium moniliforme at 6 µl dose. In case of extract, 50% mycelial zone inhibition was obtained for Penicillium citrinum and Penicillium viridicatum. Moreover, using food poison technique, the volatile oil was found to be effective for controlling the growth of F. moniliforme and Aspergillus niger whereas the extract has been found to be highly effective for Aspergillus flavus. In antibacterial investigations, using agar well diffusion method, the extract has shown better activity for Staphylococcus aureus and Bacillus cereus in comparison with volatile oil and commercial bactericide, ie Ampicillin. However, volatile oil has shown better activity for Salmonella aeruginosa and Bacillus subtilis. Moreover, the extract has shown excellent activity for the inhibition of primary and secondary oxidation products in rapeseed oil which were evaluated using peroxide, thiobarbituric acid, p-anisidine and carbonyl values. The activity of extract was further confirmed using other antioxidant properties such as ferric thiocyanate method in linoleic acid system, reducing power and scavenging effect (%) on 1,1-diphenyl-2-picrylhydrazyl radical (DPPH) radical. Hence, the extract could be considered as natural antioxidant which may be used for chemoprevention of diseases occurring due to oxidative deterioration. Copyright © 2005 Society of Chemical Industry
65 citations
TL;DR: In this paper, β-Dicalcium silicates obtained by hydrothermal method were characterized by X-ray diffraction, DSC and SEM techniques, and the extent of hydrations was found to be much higher as compared to that of β-dical calcium silicate prepared in a conventional manner using B2O3 as a stabilizer.
49 citations
TL;DR: Two alkaloids have been isolated from CH(2)Cl(2):methanol (1:1) and methanol extracts of leaves and stems of Toddalia aculeata and 15 other compounds, of which three are isolated for the first time from genus Toddalia, were established by their detailed spectral studies including 2D NMR.
30 citations
TL;DR: Aqueous Extracts of E. tirucalli adversely affect respiratory pathway of fish and cause energy crisis during stress by suppressing ATP production and the reversibility of the action of the aqueous extracts would be an additional advantage in their use.
29 citations
Journal Article•
TL;DR: A method for the 11-fold purification of the enzyme was developed and sodium azide and phenyl hydrazine inhibited the enzyme competitively.
Abstract: Solanum melongena fruit juice contains peroxidase activity of the order of 0.125 IU/mL. A method for the 11-fold purification of the enzyme was developed. The Km values of the peroxidase for the substrates guaiacol and hydrogen peroxide were 6.5 mM and 0.33 mM, respectively. The pH and temperature optima were 5.5 and 84 degrees C, respectively using guaiacol as the substrate. Sodium azide and phenyl hydrazine inhibited the enzyme competitively.
28 citations
TL;DR: In this paper, it was shown that calcium sulphate dihydrate crystallization is a nucleation controlled process and different acids are chemisorbed at the surface of forming nuclei to different extent.
Abstract: α-Hemihydrate was allowed to hydrate in the presence of tartaric, succinic, malic or citric acids at room temperature at a water/ binder ratio of 0.35. Hydration of hemihydrate leading to the crystallisation of calcium sulphate dihydrate is an exothermic process. The temperature rise during hydration was measured as a function of time using a semi-adiabatic method. The temperature rise–time curves are similar for all investigated systems but with different induction period. The results showed that calcium sulphate dihydrate crystallisation is a nucleation controlled process and different acids are chemisorbed at the surface of forming nuclei to different extent. Processes taking place during nucleation may control the morphology of resultant crystals. Infrared spectral and differential scanning calorimetric studies confirmed the adsorption of carboxylic acids at the surface of dihydrate crystals.
TL;DR: In this article, the bidentate behavior of pyrazoline ligands was confirmed by IR, 1 H and 13 C NMR spectral data, and a distorted trans-octahedral structure around tin(IV) atom for R 2 Sn(C 15 H 12 N 2 OX) 2 has been suggested.
Abstract: Diorganotin(IV) dipyrazolinates of the type R 2 Sn(C 15 H 12 N 2 OX) 2 [where C 15 H 12 N 2 OX = 3(2'-Hydroxyphenyl)-5(4-X-phenyl)pyrazoline {where X = H (a); CH 3 (b); OCH 3 (c); Cl (d) and R = Me, Pr" and Ph}] have been synthesized by the reaction of R 2 SnCl 2 with sodium salt of pyrazolines in 1:2 molar ratio, in anhydrous benzene. These newly synthesized derivatives have been characterized by elemental analysis (C, H, N, Cl and Sn), molecular weight measurement as well as spectral [IR and multinuclear NMR ( 1 H, 13 C and 119 Sn)] studies. The bidentate behaviour of the pyrazoline ligands was confirmed by IR, 1 H and 13 C NMR spectral data. A distorted trans-octahedral structure around tin(IV) atom for R 2 Sn(C 15 H 12 N 2 OX) 2 has been suggested. The free pyrazoline and diorganotin(IV) dipyrazolinates have also been screened for their antibacterial and antifungal activities. Some diorganotin(IV) dipyrazolinates exhibit higher antibacterial and antifungal effect than free ligand and some of the antibiotics.
TL;DR: In this article, the authors used density functional theory to calculate the bond lengths and charge distribution of pericondensed PAHs in both neutral and cationic forms, and showed that significant change in fractional charge on atoms is present particularly for the outer carbon atoms.
TL;DR: Extracts of Capparis decidua stems and flowers showed insecticidal and oviposition inhibitory activities against Bruchus chinensis and one novel compound labeled as CDF1 has been isolated and identified as 6-(1-hydroxy-non-3-enyl)tetrahydropyran-2-one.
Abstract: Extracts of Capparis decidua stems and flowers showed insecticidal and oviposition inhibitory activities against Bruchus chinensis. The LC50 values of these extracts were found to increase with the increase in the polarity of the extract at different exposure periods. For instance, after 96 h, the LC50 values were found to be 3.619, 7.319, and 10.151 μg for CD1, CD2, and CD3, respectively. Extract CD7 was effective only at higher doses. The toxicity was found to be dose- and time-dependent. The females laid lesser number of eggs, when exposed to sublethal doses of different extracts and pure compounds, as compared to control. The maximum oviposition deterrence index was found for extract CD1 followed in decreasing order by CD2, CD3, and CD7. From extract CD1, two compounds were isolated and characterized as triacontanol (C1) and 2-carboxy-1,1-dimethylpyrrolidine (C2). When the females were exposed to sublethal doses of these compounds, they laid lesser number of eggs as compared to the control. C2 was fou...
TL;DR: The effect of single, binary, and tertiary combination of few plant derived molluscicides alone or in combination with synergist on different enzymes in the nervous tissue of the freshwater snail Lymnaea acuminata significantly altered the activity of these enzymes.
TL;DR: A series of new coordination complexes of La(III) and Pr( III) with hydrazones, derived from 1,1-diacetylferrocene and different aromatic acid hydrazides have been synthesized and characterized by elemental analyses, electrical conductance, magnetic moment, IR, (1)H NMR, UV-vis spectra and molar conductance.
TL;DR: In this article, the reaction of lanthanum(III and praseodymium(III) chloride with barium dithiocarbamate and complexes of type [LnCl(L)H2O]n have been obtained.
TL;DR: In this article, intermolecular interactions between a pair of molecules of a nematic liquid crystal namely, p -ethoxybenzylidene- p - n -butylaniline (EBBA) have been evaluated using Rayleigh-Schrodinger second order perturbation theory along with multicentredmultipole expansion technique.
TL;DR: In this article, Terepthal-bis-4-n-n -butylaniline (TBMA) analysis was carried out using computer simulation techniques and the probability of occurrence of a configuration was estimated using the Maxwell-Boltzmann formula.
TL;DR: Isothermal TG of initial decomposition of metal nitrate complexes, have been carried out to evaluate the kinetics of early thermolysis and model fitting and isoconversional method have been used for the evaluation of the Kinetics of thermal decomposition.
TL;DR: In this article, the infrared spectra of these glasses were studied in the region 4000-400 cm -1, and the existence of characteristic P-O-P linkages of linear polyphosphate chains and presence of O-P-O units in the phosphate tetrahedra.
TL;DR: In this paper, two bis(bipyridine) polymeric metal nitrate complexes with 4,4'-bipy 2]-NO3)2⋅xH2O (where M=Co, Ni and Cu; x=4, 2 and 0, respectively) have been prepared and characterised.
Abstract: Two bis(bipyridine) polymeric metal nitrate complexes
with 4,4’-bipyridine of simple formula like [M(bipy)2](NO3)2⋅xH2O (where M=Co, Ni and Cu; x=4, 2 and 0, respectively) have been prepared and
characterized. Their thermal decomposition has been undertaken using simultaneous
TG-DTG-DTA and DSC in nitrogen atmosphere and non-isothermal TG in air atmosphere.
Isothermal TG has been performed at decomposition temperature range of the
complexes to evaluate the kinetics of decomposition by applying model-fitting
as well as isoconversional method. Possible mechanistic pathways have also
been proposed for the thermolysis. Ignition delay measurements have been carried
out to investigate the response of these complexes under the condition of
rapid heating.
Journal Article•
TL;DR: The results suggest that n-propanol can substitute veratryl alcohol as substrate for assaying ligninperoxidase activities from different fungal strains, without affecting the enzymatic characteristics.
Abstract: The activities of ligninperoxidases from Penicillium citrinum MTCC 3565, Fusarium oxysporum MTCC 3379 and Aspergillus terreus MTCC 3374 have been assayed and the enzymatic characteristics like K m , pH and temperature optima using n-propanol as the substrate have been reported. The results suggest that n-propanol can substitute veratryl alcohol as substrate for assaying ligninperoxidase activities from different fungal strains, without affecting the enzymatic characteristics. The above strains were selected, as they were known to secrete ligninperoxidase in the liquid culture medium.
TL;DR: Stacking and in-plane intermolecular interactions between nucleic acid base pairs and of 9-amino-[N-(2-dimethylamino) ethyl] acridine-4-carboxamide drug have been evaluated using quantum mechanical methods.
TL;DR: In this paper, a variety of oxo-bridged trinuclear mixed-ligand chromium(III) complexes were synthesized by substitution reactions of acetate ions from their respective acetate complexes.
Abstract: A variety of novel oxo-bridged trinuclear mixed-ligand complexes of chromium(III) were synthesized by substitution reactions of acetate ions from their respective acetate complexes. The isolated products of the types [Cr3O(OAc)3(OOCR] 3 + and [Cr3O(SOCPh)3(OOCR)3]+ (R = C13H27, C15H31 or C17H35) are mixed-ligand chromium(III) complexes with straight-chain carboxylic and thiocarboxylic acids. These were characterized by elemental analyses, spectral (infrared, electronic, FAB mass, and powder XRD) studies, molar conductances, and magnetic susceptibility measurements. The IR spectra suggested the bridging nature of the carboxylate and thiocarboxylate anions along with v as (Cr3O) vibrations in the complexes. The trinuclear nature of the complexes was assessed from the FAB mass data. Electronic absorption spectra and magnetic moment data were in favor of an octahedral environment around chromium(III), which was supported by their powder X-ray diffraction data. Conductance measurements indicated that the complexes were 1: 1 electrolytes in nitrobenzene. Structures of the complexes were established on the basis of spectral and other physicochemical studies.
TL;DR: The entropy production due to solute and water transport has been quantified for both the membranes in the light of nonequilibrium thermodynamics and frictional coefficients show close dependence on external electrolyte concentrations.
TL;DR: Binary combinations of freeze-dried cow urine kept for 15 days separately with each of Allium sativum (Liliaceae) bulb powder, Azadirachta indica (Meliaceae) oil, Annona squamosa (Annonaceae) seed powder, Ferula asafoetida (Apiaceae) root latex and tea leaves, and Camellia sinensis (Theaceae) were more toxic to the snail than treatment with urine alone.
Abstract: Molluscicidal activity of cow urine alone and with different additives was studied against Lymnaea acuminata. The toxicity of cow urine kept for 15 days in sunlight (8 h/day) or ambient laboratory conditions against the snail was time- and concentration-dependent. The pH of fresh cow urine is 7.4 which changes to 10.9 when kept for 15 days in laboratory; exposure to sunlight for the same period alter the pH to 10.85. Binary combinations (1:1) of freeze-dried cow urine kept for 15 days separately with each of Allium sativum (Liliaceae) bulb powder, Azadirachta indica (Meliaceae) oil, Annona squamosa (Annonaceae) seed powder, Ferula asafoetida (Apiaceae) root latex and tea leaves, and Camellia sinensis (Theaceae) were more toxic to the snail than treatment with urine alone. Additives to cow urine in sunlight were more effective than those under laboratory conditions.
TL;DR: In this paper, the effects of nonidealness of the gas, the conductivity of gas, and the axial magnetic field have been investigated to determine the shock velocity and the other flow-variables just behind the shock in the cases, when (i) the gas is weakly ionised before and behind the curve of the shock front, and (ii) nonionised gas undergoes intense ionisation as a result of the passage of the wave.
Abstract: This paper analyses the propagation of converging cylindrical shock waves in a nonideal gas, in the presence of an axial magnetic field. Chester-Chisnell-Whitham’s method has been employed to determine the shock velocity and the other flow-variables just behind the shock in the cases, when (i) the gas is weakly ionised before and behind the shock front, (ii) the gas is strongly ionised before and behind the shock front, and (iii) nonionised gas undergoes intense ionisation as a result of the passage of the shock. The effects of the nonidealness of the gas, the conductivity of the gas, and the axial magnetic field have been investigated. It is found that in the case (i), an increase in the value of parameter ( ) characterising the nonidealness of the gas accelerates the convergence of the shock. In the case (ii), the shock speed and pressure behind the shock increase very fast as the axis is approached; and this increase occurs earlier if the strength of the initial magnetic field is increased. In the case (iii), for smaller values of the initial magnetic field, the shock speed, and pressure behind the shock decrease very fast after attaining a maximum; and for higher values of the initial magnetic field, the tendency of decrease appears from the beginning. This shows that the magnetic field has damping effect on the shock propagation. In the case (iii), it was also found that the growth of the shock in the initial phase and decay in the last phase were faster when it was converging in a nonideal gas in comparison with that in a perfect gas. Further, it has been shown that the gas-ionising nature of the shock has damping effect on its convergence.
TL;DR: In this article, Colloidal mercuric sulphide particle inclusion during electrochemical formation of cadmium selenide has been attempted to explore possibilities of obtaining enhanced photoresponsiveness and reduced electrochemical corrosion.
TL;DR: In this paper, the interaction between poly(styrene-alt-maleic acid) sodium salt and hydrating Portland cement has been studied with the help of X-ray diffraction, differential scanning calorimeter, scanning electron microscopy and infrared spectral studies.