Showing papers by "Deen Dayal Upadhyay Gorakhpur University published in 2002"
TL;DR: The essential oils extracted from the seeds of seven spices, Anethum graveolens, Carum capticum, Coriandrum sativum, Cuminum cyminum, Foeniculum vulgare, Pimpinella anisum and Seseli indicum have been studied for antibacterial activity against eight pathogenic bacteria, causing infections in the human body.
Abstract: The essential oils extracted from the seeds of seven spices, Anethum graveolens, Carum capticum, Coriandrum sativum, Cuminum cyminum, Foeniculum vulgare, Pimpinella anisum and Seseli indicum have been studied for antibacterial activity against eight pathogenic bacteria, causing infections in the human body. It has been found that the oil of C. capticum is very effective against all tested bacteria. The oil of C. cyminum and A. graveolens also gave similar results. These oils are equally or more effective when compared with standard antibiotics, at a very low concentration.
322 citations
TL;DR: The bioassay of these oils indicated C. longa as good antifungal material and cause complete mycelial growth of Colletotrichum falcatum (CF), Fusarium moniliforme (FM), at 1000 ppm and Curvularia Pallescens (CP), Aspergillus niger(AN),Fusarium oxysporium (FO), at 2000 ppm concentrations.
155 citations
TL;DR: The futuristic potentials of these salts are analysed critically and further studies have been suggested.
60 citations
TL;DR: The leaf essential oil of Coleus amboinicus was found to be insecticidal to white termites (Odon-totermes obesus Rhamb) with 100% mortality at a dose of 2.5 ð 10 � 2 mg/cm 3 for 5 h exposure as mentioned in this paper.
Abstract: Chemical investigations of the leaf essential oil of Coleus amboinicus by GC and GC-MS tech- niques indicated the presence of six components, accounting for 97% of the total oil. The major component was thymol (94.3%), followed by carvacrol (1.2%), 1,8-cineole (0.8%), p-cymene (0.3%), spathulenol (0.2%), terpinen-4-ol (0.2%) and an unidentified component (1.4%). The oil was insecticidal to white termites (Odon- totermes obesus Rhamb.) with 100% mortality at a dose of 2.5 ð 10 � 2 mg/cm 3 for 5 h exposure. This oil was also more active than the synthetic insecticides, Thiodan and Primoban-20, against termites, although it was ineffective against Tribolium castaneum, a stored product pest. Copyright 2002 John Wiley & Sons, Ltd.
60 citations
Journal Article•
TL;DR: The study gave a weight into the possibility of formulating suitable preparation from the latex and stem bark extracts of the plant for use in mosquito control programme.
Abstract: The methanolic, chloroform and ether extracts of Euphorbia tirucalli latex and stem bark were evaluated for larvicidal activity against laboratory-reared larvae of Culex quinquefasciatus (Diptera: Culicidae), vector of the brancroftian filariasis and worst urban nuisance mosquito. The latex extracts contain more potent larvicidal components (177.14 mg/L-326.37 mg/L) than the stem bark extracts (237.663 mg/L-513.39 mg/L). The order of toxicity (LC50) for the latex extracts was Methanol extract (177.14 mg/L) > Chloroform (200.76 mg/L) > Ether (326.37 mg/L) while the rank of order of toxicity (LC50) of stem bark extracts was Ether (237.66 mg/L) > Chloroform (343.515 mg/L) > Methanol (513.387 mg/L), Higher doses (LC90 24 h of mosquito larvae) of each extract did not cause any mortality among fishes after 24 h. The study gave a weight into the possibility of formulating suitable preparation from the latex and stem bark extracts of the plant for use in mosquito control programme.
53 citations
TL;DR: In this paper, the authors used free lime determinations and differential thermal analysis to show that CaCl 2 accelerates the pozzolanic reaction of Ca(OH) 2 and RHA.
51 citations
TL;DR: In this paper, the decomposition of basic copper carbonate in the presence and absence of NaNO 3 -KNO 3 eutectic melt has been studied by employing isothermal TG and dynamic TG/DSC techniques.
44 citations
TL;DR: It has been suggested that these plant products cannot be used directly in freshwater bodies, without their detailed studies on long-term effects on non-target organism as well their structure activity relationship.
40 citations
TL;DR: In this paper, four transition metal hexammine perchlorates namely, [Cu(NH3)6](ClO4)2, [Co(NH 3)6]-ClO 4)2 and [Zn 3] were used as ballistic modifiers in the combustion of hydroxy terminated polybutadiene (HTPB)-Ammonium perchlorate composite solid propellants.
Abstract: Four transition metal hexammine perchlorates namely, [Cu(NH3)6](ClO4)2, [Co(NH3)6](ClO4)2, [Ni(NH3)6](ClO4)2 and [Zn(NH3)6](ClO4)2 have been prepared, characterized and used as ballistic modifiers in the combustion of hydroxy terminated polybutadiene (HTPB)-Ammonium perchlorate (AP) composite solid propellants. Burning rate was considerably enhanced with [Co(NH3)6](ClO4)2 and [Cu(NH3)6](ClO4)2 whereas moderately with [Ni(NH3)6](ClO4)2 and [Zn(NH3)6](ClO4)2 at low concentration (2% by wt). [Co(NH3)6](ClO4)2 was found to accelerate the burning rate by three fold at two percent concentration and it can be exploited as potential energetic burning rate modifier for HTPB-AP propellants. Further, ignition delay studies showed that the deflagration of propellants and AP was accelerated by these additives.
38 citations
TL;DR: In this article, the authors measured the apparent excess speeds of sound u and the isentropic compressibilities κS for binary mixtures of n-butanol (n-C4H9OH) with n-pentane, n-hexane, or n-C6H14 at temperature T=288.15 and T=303.15 K, respectively, and fitted the Δu and κSE with smoothing equations.
31 citations
Journal Article•
TL;DR: Enzymatic characteristics like Km, pH and temperature optima using veratryl alcohol as the organic substrate of ligninperoxidases from above sources have been determined.
Abstract: Secretion of ligninperoxidase [E.C.1.11.1.7] by Penicillium citrinum, Fusarium oxysporum and Aspergillus terreus in liquid culture growth medium has been demonstrated. Enzymatic characteristics like Km, pH and temperature optima using veratryl alcohol as the organic substrate of ligninperoxidases from above sources have been determined. Km values using veratryl alcohol as substrate for enzymes from P. citrinum, F. oxysporum and A. terreus were 69, 64 and 60 microM respectively. Km values using H2O2 as the variable substrate were 64, 72 and 80 microM. The pH optima were 4.0, 2.3 and 2.0 respectively. The values of temperature optima were 30 degrees, 25 degrees and 22 degrees C for the enzymes from P. citrinum, F. oxysporum and A. terreus respectively.
TL;DR: Multiple shoot regeneration from the cut plumular ends of embryo axes of chickpea was evaluated and TDZ was found to be the most effective cytokinin as it produced multiple shoots in 100 % of the explants from genotypes C235, ICC5166, ICC12269, ICC4951, ICC11531, BG256 and a local cultivar.
Abstract: Multiple shoot regeneration from the cut plumular ends of embryo axes of chickpea (Cicer arietinum L.) was evaluated on Murashige and Skoog medium having different concentrations of thidiazuron (TDZ) (0.1 to 10.0 mg dm−3) 6-benzylaminopurine (BAP) (0.5 and 1.0 mg dm−3), kinetin (0.5 and 1.0 mg dm−3) or zeatin (2.0 and 4.0 mg dm−3). TDZ (0.2 mg dm−3) was found to be the most effective cytokinin as it produced multiple shoots in 100 % of the explants from genotypes C235, ICC5166, ICC12269, ICC4951, ICC11531, BG256 and a local cultivar. Shoots were elongated on growth regulator-free medium, and rooted on growth regulator-free medium containing 1/4 MS salts + full vitamins + 3 % sucrose. Plantlets formed were acclimatized for 12 – 15 d in MS medium with a gradual reduction in sucrose concentration and transferred into pots filled with soil and kept in the field; this resulted in more than 70 % survival. The plants developed normally and produced fertile flowers and set seeds. Low temperatures, maximum 19.0 °C, and minimum 8.2 °C, during the first 15 d of transfer favoured survival on transfer to pots.
TL;DR: In this article, five transition metal salts of 5-nitro-2-4-dihydro-3H-1,2,4-triazole-3-one, [namely M(NTO)n⋅mH2O] were prepared and characterized.
Abstract: Five transition metal salts of 5-nitro-2,4-dihydro-3H-1,2,4-triazole-3-one, [namely M(NTO)n⋅mH2O where M is Ag, Hg, Cd, Cr, Fe where n=1,2,2,3,3 and m=1,2,2,8,2 respectively] were prepared and characterized (hereafter these compounds will be named as AgNTO, HgNTO, CdNTO, CrNTO and FeNTO, respectively). Their thermal decomposition was investigated by TG, DTA whereas explosive behaviour has been studied in terms of explosion delay, impact and friction sensitivities. Further, kinetic parameters have been derived using non-isothermal TG data and mechanism of thermolysis has also been proposed. It seems that dehydration takes place prior to the evolution of NO2 and the subsequent ring rupture yielding metal oxide. AgNTO on the other hand yields metallic silver. Dehydration in the case of HgNTO occurs in two steps: at each step one molecule is lost. All the salts are insensitive to impact and at the same time insensitive to friction up to 360 N.
TL;DR: In this paper, the specific surface area of β-dicalcium silicate decreased with temperature and X-ray diffraction studies were conducted to determine the nonevaporable water, calcium hydroxide (CH) contents, and specific surface areas of the hydrated samples.
Abstract: Calcium silicate hydrate was prepared by hydrothermal reaction between calcium oxide and silica (C/S = 2.0) at a temperature of 205°-215°C and a pressure of 17-19 bar. This reaction with decomposition at 900°C produced highly reactive β-dicalcium silicate (specific surface area 4.55 m 2 /g) contaminated with small amounts of wollastonite as an impurity. Infrared spectral studies have shown that β-dicalcium silicate prepared at 900°C is less symmetric compared with the control prepared at 1450°C using boron trioxide as a stabilizer. The specific surface area of β-dicalcium silicate decreased with temperature. The hydration studies were done by determining the nonevaporable water, calcium hydroxide (CH) contents, and specific surface area of the hydrated samples. X-ray diffraction studies were also done. The results showed that prepared β-dicalcium silicate is highly reactive. Calcium chloride (1.0 wt%) and gypsum retard the hydration. Possible causes of high reactivity have been discussed.
TL;DR: Withdrawal study shows that there is nearly complete recovery in total protein, total free amino acids level and protease activity in all the three tissues of the fish after the 7th day of the withdrawal of treatment, which supports the view that the plant product is safer in use as pesticides for control of common weed fishes in culture ponds.
TL;DR: The toxic effect of single and binary treatments of synthetic and plant‐derived molluscicides was studied against the harmful terrestrial snail Achatina fulica and the toxicities were dose and time dependent.
Abstract: The toxic effect of single and binary treatments of synthetic and plant-derived molluscicides was studied against the harmful terrestrial snail Achatina fulica. In single treatments, among the synthetic molluscicides Snail Kill and cypermethrin were potent, whereas Cedrus deodara oil was more toxic among molluscicides of plant origin against A. fulica. In binary treatments, a combination of Cedrusdeodara + Alliumsativum was more toxic. The toxicities of these single and binary treatments of synthetic and plant-derived molluscicides were dose and time dependent.
TL;DR: In this article, the effect of doping and temperature gradient on the solid-liquid interface morphology and quality of crystal was determined by studying the bulk transparency and nonlinearity of crystal.
TL;DR: In this article, the preparation of some multiple band gap semiconductor films based on CdSe and ZnSe has been carried out using galvanostatic electrochemical codeposition technique to investigate their photoelectrochemical characteristics on the basis of photoelectromagnetism and photoaction spectral studies using I2/I3 and [Fe (CN) 6] 3� /[Fe [Fe(CN] 4� redox couples.
TL;DR: In this paper, a plausible resonance chain structure for these glasses has been established and discussed on the basis of IR studies, a plausible Resonance Chain Structure for Silver Phosphate Glassed Glassed Doped with different concentrations of zinc and cadmium halides have been established.
TL;DR: In this paper, the authors measured the speeds of sound u in binary liquid mixtures of n -octanol (n -C 8 H 17 OH) and n -hexane (n-C 6 H 14 ), or n -heptane ( n -C 7 H 16 ), or N -octane (N 8 H 18 ) at T =298.15
TL;DR: In this article, the in situ reactions of 3,6-dimethyl/diphenyl-4,5-diazaocta-3, 5-diene-2,7-dione with diamines (ethylenediamine, o-phenylenediamines) in the presence of vanadyl salt yielded binuclear macrocyclic complexes of type [(VO)2mac](SO4)2.
Abstract: The in situ reactions of 3,6-dimethyl/diphenyl-4,5-diazaocta-3,5-diene-2,7-dione with diamines (ethylenediamine, o-phenylenediamine) in the presence of vanadyl salt yielded binuclear macrocyclic complexes of type [(VO)2mac](SO4)2. Attempts to synthesize the corresponding metal-free macrocyclic ligands did not prove successful. The magnetic moment of the complexes decreases from ca. 1.73 (295 K) to 1.65μ B (91 K). The electronic spectra exhibit three bands at ca. 12 000-14 200, 18 200-19 500 and an intense band at ca. 30 000 cm-1. The third band is probably due to a oxo → V(IV) charge-transfer transition. The infrared spectra indicate that the ligands coordinate through four aza nitrogen atoms to each V(IV). The fluid solution EPR spectra show an eight line pattern typical of a mononuclear VO(IV) compound and indicating the absence of VO…VO electron spin interaction. The electrochemical behavior of one complex with regards to oxidation has been studied by cyclic voltammetry in MeCN-MeOH solution.
TL;DR: The vapour action of pure monoterpenoids and volatile oils has been screened for their antifungal activity against four sugarcane pathogenic fungi using inverted petriplate method and menthol caused complete mycelial inhibition againstCurvularia pallescens at 2000 ppm.
Abstract: The vapour action of pure monoterpenoids and volatile oils has been screened for their antifungal activity against four sugarcane pathogenic fungi using inverted petriplate method. Among tested monoterpenoids, menthol caused complete mycelial inhibition againstCurvularia pallescens at 2000 ppm, geraniol againstColletotrichum falcatum at 3000 ppm, linalool againstC. pallescens at 3000 ppm concentrations. Among tested essential oils, seed oil ofDaucus carota showed complete mycelial inhibition ofC. falcatum at 3000 ppm,Sugandh kokila oil againstC. falcatum at 3000 ppm,Curcuma aromatica againstC. falcatum at 3000 ppm andCurcuma zedoaria rhizome oil againstC. falcatum at 2000 ppm concentrations. Other doses of oils and monoterpenoids exhibited lower antifungal activity.
TL;DR: Ten newly synthesized organophosphorus derivatives containing substituted chalcones and substitution chalcone semicarbazones were tested for their antifungal efficacy against sugarcane pathogens and the screening results were correlated with structural features of the tested compounds.
Abstract: Ten newly synthesized organophosphorus derivatives containing substituted chalcones and substituted chalcone semicarbazones were tested for their antifungal efficacy against Colletotrichum falcatum, Fusarium oxysporum, Curvularia pallescens (all sugarcane pathogens). The O,O-diethylphosphate derivatives containing 2-chlorochalcone and 2-chlorochalcone semicarbazone exhibited 70-85% mycelial inhibition against all the test fungi at 1000 ppm. The screening results were correlated with structural features of the tested compounds.
TL;DR: The metal oxides obtained in this manner are expected to have a lower surface area and hence may act as a better catalyst as mentioned in this paper, and the reactions may be homogeneous or heterogeneous.
TL;DR: In this paper, the Fourier transform of a continuous gravitational wave was obtained for a 1-yr observation time and an arbitrary observation time, for an arbitrary location of detector and source, taking into account the effects arising due to the rotational as well as orbital motion of the Earth.
Abstract: In this paper we obtain the Fourier Transform of a continuous gravitational wave. We have analysed the data set for (i) a 1-yr observation time and (ii) an arbitrary observation time, for an arbitrary location of detector and source, taking into account the effects arising due to the rotational as well as orbital motion of the Earth. As an application of the transform we considered spin-down and N-component signal analysis.
TL;DR: The essential oil hydrodistilled from leaves of Lantana indica growing in plain regions of northern India was analyzed by GC and GS/MS and Spathulenol was the major component, accounting for approximately 82% of the total oil.
Abstract: The essential oil hydrodistilled from leaves of Lantana indica growing in plain regions of northern India was analyzed by GC and GS/MS. Forty-three compounds were identified, accounting for approximately 82% of the total oil. Spathulenol (12.8%) was the major component, followed by β-caryophyllene (8.4%) and β-elemene (5.0%).
TL;DR: In this article, three dimethylanilinium sulfates (DMAS) have been prepared and characterised by elemental and spectral studies and the thermal decomposition of these salts has been studied by TG and simultaneous TG-DTG technique and kinetic parameters were evaluated from both dynamic and isothermal TG data using mechanism based kinetic equations.
Abstract: Three dimethylanilinium sulfates (DMAS) have been prepared and characterised by elemental and spectral studies. Thermal decomposition of these salts has been studied by TG and simultaneous TG-DTG technique and kinetic parameters were evaluated from both dynamic and isothermal TG data using mechanism based kinetic equations. The thermal decomposition pathways have also been suggested and it has been found that DMAS salts give dimethyl aminobenzenesulfonic acids (DMABSA) via solid state reaction. The primary step in the thermal decomposition involves proton transfer followed by sulfonation.
TL;DR: Some cobalt(II) complexes of thiocarboxylic acids have been synthesized by substitution reactions and characterized by elemental analyses, spectral studies and magnetic moment measurements as mentioned in this paper.
Abstract: Some cobalt(II) complexes of thiocarboxylic acids with the general composition Co(SOCR′)2 and Co(SOCR′)(OOCR) [where R= C13 H27, C15H31 or C17H35 and R′=CH3 or C6H5] have been synthesized by substitution reactions and characterized by elemental analyses, spectral studies and magnetic moment measurements. The electrical conductance data indicate that (Co(SOCCH3)2 is a 1:2 electrolyte while the other complexes are non-electrolytes. IR spectra show the presence of bidentate and bridging modes of coordination for carboxylate and thiocarboxylate anions, respectively. Electronic spectral data and magnetic moment values indicate an octahedral environment around cobalt(II). The plausible structure for the trimeric species has been proposed on the basis of the physico-chemical studies. Thermoanalytical data indicate the complexes are stable upto 175 °C, above which decomposition starts.