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Mamta Kumari,D. K. Sharma 대한화학회 2011 대한화학회지 Vol.55 No.1
The electrochemical reduction of (2,4-difluoro-phenyl)-(2-phenyl-1H-quinolin-4-ylidene)-amine was investigated in 0.1 M tetrabutylammoniumbromide in N,N-dimethylformamide at glassy carbon electrode (GCE) using the technique of cyclic voltammetry at the room temperature (290 K). The reduction of imines occurs in two successive steps,involving one electron in each. In this medium the first peak was observed at about -0.793 V (vs Ag/Ag^+) at the glassy carbon electrode surface, which is more stable and well defined as compared to the second peak. The diffusion coefficient (D_0) of imine in the investigated solvent media has been calculated using the modified Randles-Sevcik equation. The electron transfer coefficient (α) of the reactant species has also been calculated.
On some identities of Ramanujan found in his lost notebook
D.D. Somashekara,D. Mamta 장전수학회 2008 Advanced Studies in Contemporary Mathematics Vol.16 No.2
In this paper we obtain an interesting identity using the well-knownq-binomial the-orem and Heine's transformation. Using this identity, we derive some identities ofRamanujan found in his lost notebook and also obtain some identities which areanalogous to the identities of Ramanujan along with some special cases.
Kumari, Mamta,Sharma, D.K. Korean Chemical Society 2011 대한화학회지 Vol.55 No.1
(2, 4-difluoro-phenyl)-(2-phenyl-1H-quinolin-4-ylidene)-amine의 전기화학적 환원에 대하여 실온에서 순환전압전류 기술을 사용한 유리탄소전극(GCE)에서 N,N-dimethylformamide 하에서 0.1 M tetrabutylammoniumbromide로 조사하였다. 이민의 환원은 각각 한 전자를 포함하면서 2단계의 성공적인 단계로 일어난다. 이 매개물에서 처음 피크는 유리탄소전극 표면에서 약 -0.793 V(vs Ag/$Ag^+$)로 관측되었다. 그리고 그것은 더욱 안정하고 2번째 피크와 비교하여 명확하게 설명된다. 연구된 용매 매개물에서 이민의 확산계수($D_0$)는 수정된 Randles-Sevcik 식을 이용해 계산되었다. 반응 종들의 전자 이동 계수($\alpha$) 또한 계산되었다. The electrochemical reduction of (2,4-difluoro-phenyl)-(2-phenyl-1H-quinolin-4-ylidene)-amine was investigated in 0.1 M tetrabutylammoniumbromide in N,N-dimethylformamide at glassy carbon electrode (GCE) using the technique of cyclic voltammetry at the room temperature (290 K). The reduction of imines occurs in two successive steps, involving one electron in each. In this medium the first peak was observed at about -0.793 V (vs Ag/$Ag^+$) at the glassy carbon electrode surface, which is more stable and well defined as compared to the second peak. The diffusion coefficient ($D_0$) of imine in the investigated solvent media has been calculated using the modified Randles-Sevcik equation. The electron transfer coefficient ($\alpha$) of the reactant species has also been calculated.
Amplitude saturation effect of a laser-driven plasma beat-wave on electron accelerations
Gupta, D. N.,Singh, Mamta,Suk, H. Cambridge University Press 2015 Journal of plasma physics Vol.81 No.3
<P>A large-amplitude plasma beat-wave driven by two lasers (differing in frequencies equal to the plasma frequency) can accelerate the plasma electrons to a higher energy level. As the plasma beat-wave grows, it becomes susceptible to oscillating two-stream instability. The decayed sideband plasma wave couples with the pump wave to divert its energy by the instability, and saturates it. The saturated amplitude of the plasma beat-wave traps the electrons more effectively to accelerate them to higher energy. The saturation of plasma beat-wave amplitude is shown to have a significant effect in an electron energy gain.</P>
Kabdal Tanuja,Karakoti Himani,Upadhyay Pringal,Kumar Ravendra,Prakash Om,Dhami Anamika,Latwal Mamta,Pandey Ganesh,Srivastava R.M.,Kumar Satya,Rawat D.S. 한국응용곤충학회 2023 Journal of Asia-Pacific Entomology Vol.26 No.2
The present research aimed to analyze the nematicidal and insecticidal activity of the essential oil obtained from the fruits of Zanthoxylum armatum collected from Gumma village of Dharchula and Chandak village of Pithor agarh. After extraction via hydro distillation, the essential oils were subjected to GC–MS for their compositional analysis. A total of 10 and 13 components were identified for the Dharchula and Pithoragarh collection respectively. Linalool (32.86 %) was the major component in collection from Dharchula whereas it was totally absent in that of collection from Pithoragarh which has trans-sabinene hydrate (11.7 %) as its major component. Essential oils were tested against Meloidogyne incognita for their nematicidal activity and inhibition of egg hatching in laboratory conditions. It was found that the activity of Z. armatum from Dharchula shows high mortality of Meloidogyne incognita and more inhibition to the egg hatching. When tested for insecticidal activity against Lipaphis erysimi, collection from Dharchula presented stronger activity compared to Pithoragarh collec tion as shown by their LC 50 values 0.006 and 0.165 µL/mL respectively after 36 hrs. The in silico PASS study and molecular docking study was conducted to screen the nematicidal and insecticidal potential of the major com ponents on acetylcholinesterase receptors. Results showed good binding affinities and attributed the strongest inhibitory effect to verbenone for the target protein.