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Kolothodi Chandran Jisha,Jos Thomas Puthur 한국작물학회 2014 Journal of crop science and biotechnology Vol.17 No.4
Seed priming improves the seed performance and also helps the seedlings to alleviate the detrimental effects of various stresses. Seed priming is believed to bring about some biochemical changes in the metabolism within the seed, which ultimately favors germinationand the further growth stages of the seedlings even under stressed conditions. The present investigation was carried out tostudy the effect of hydropriming and halopriming in three rice varieties (Neeraja, Vaisakh, and Vytilla 6), with varied abiotic stresstolerance potential under NaCl and PEG stress. In general, the application of both stresses, NaCl and PEG induced retardation ofgrowth and metabolism of the seedlings. However, seed priming treatments could reduce the extent of decrease in these biologicalattributes. Both hydro- and halopriming resulted in the enhancement of protein, carbohydrate, and photosynthetic pigment content,modulated antioxidant enzyme activities, reduced the lipid peroxidation of biomembranes, and enhanced the photochemistry andmitochondrial activities in rice seedlings subjected to NaCl and PEG stress as compared to non-primed ones. According to the variousmorphological, physiological, and biochemical characteristics studied in the rice seedlings raised from primed and non-primedseeds, we confirmed that both hydropriming and halopriming had a positive influence on stimulating metabolism in rice seeds, whichultimately resulted in improved seedling vigor and tolerance under NaCl and PEG stress. Halopriming was found to be more efficientthan hydropriming in enhancing the seedling vigor, overall growth, and stress tolerance potential of rice varieties
Christy, Maria,Jisha, M.R,Kim, Ae-Rhan,Nahm, Kee-Suk,Yoo, Dong-Jin,Suh, E.K.,Kumari, T. Sri Devi,Kumar, T. Prem,Stephan, A. Manuel Korean Chemical Society 2011 Bulletin of the Korean Chemical Society Vol.32 No.4
Nanoscopic $Co_3O_4$ particles were prepared using avian egg membrane as a template at $800^{\circ}C$. The prepared materials were subjected to XRD, SEM, TEM and Raman spectroscopic studies. Cyclic voltammetry study shows a single step oxidation and reduction process. Electrochemical lithium insertion behavior of the materials was examined in coin cells of the 2032 configuration. The material showed a discharge capacity 600mAh/g even after 20 cycles.
Rho-dependent Transcription Termination: More Questions than Answers
Ranjan Sen,Jisha Chalissery,Sharmistha Banerjee,Irfan Bandey 한국미생물학회 2006 The journal of microbiology Vol.44 No.1
Escherichia coli protein Rho is required for the factor-dependent transcription termination by an RNA polymerase and is essential for the viability of the cell. It is a homohexameric protein that recognizes and binds preferably to C-rich sites in the transcribed RNA. Once bound to RNA, it utilizes RNA-dependent ATPase activity and subsequently ATPase-dependent helicase activity to unwind RNA-DNA hybrids and release RNA from a transcribing elongation complex. Studies over the past few decades have highlighted Rho as a molecule and have revealed much of its mechanistic properties. The recently solved crystal structure could explain many of its physiological functions in terms of its structure. Despite all these efforts, many of the fundamental questions pertaining to Rho recognition sites, differential ATPase activity in response to different RNAs, translocation of Rho along the nascent transcript, interactions with elongation complex and finally unwinding and release of RNA remain obscure. In the present review we have attempted to summarize ‘the knowns’ and ‘the unknowns’ of the Rho protein revealed by the recent developments in this field. An attempt has also been made to understand the physiology of Rho in the light of its phylogeny.
Lithium Insertion Behavior of Nanoscopic Co_3O_4 Prepared with Avian Egg Membrane as a Template
Maria Christy,Jisha. M. R,김애란,남기석,유동진,서은경,T. Sri Devi Kumari,T. Prem Kumar,A. Manuel Stephan 대한화학회 2011 Bulletin of the Korean Chemical Society Vol.32 No.4
Nanoscopic Co_3O_4 particles were prepared using avian egg membrane as a template at 800 °C. The prepared materials were subjected to XRD, SEM, TEM and Raman spectroscopic studies. Cyclic voltammetry study shows a single step oxidation and reduction process. Electrochemical lithium insertion behavior of the materials was examined in coin cells of the 2032 configuration. The material showed a discharge capacity 600mAh/g even after 20 cycles.
Madhu S. Nair,Jisha Jose,Anil Prahladan 대한의용생체공학회 2013 Biomedical Engineering Letters (BMEL) Vol.3 No.2
Purpose Ultrasound (US) imaging is widely used for diagnosis these days due to its advantages such as no-radiation,portability and low cost. But the two inherent drawbacks of US imaging are low contrast and speckle noise. The objective of the proposed algorithm is to simultaneously enhance the contrast and suppress the speckle noise thereby improving the visual quality of the US image. Methods Normalization and fuzzification are used as the preprocessing steps for the contrast enhancement and the mapping of intensity values to brightness degree of US images. A fuzzy sub-pixel fractional partial difference with Jensen Shannon divergence operator is proposed here for determining whether a pixel is noise or edge, and thereby reducing the speckle noise. The proposed method is a generalization of first, second and fourth order difference with weight information collected from the overall view of the image. Results Proposed method has been tested both on synthetic and real ultrasound images. The results show that the proposed method improves preservation of relevant information without compromising the quality of visual appearance. FOM and Contrast measures prove the superiority of the proposed method over conventional as well as advanced methods. Conclusions The experimental results demonstrate that the proposed DJ method has the advantage of maximizing speckle reduction and contrast enhancement, with great accuracy for slightly varying edges and the fine details are well preserved. The method can improve the quality of US images, and will be useful for CAD systems for cancer detection and classification based on US images.
Rho-dependent Transcription Termination: More Questions than Answers
Banerjee Sharmistha,Chalissery Jisha,Bandey Irfan,Sen Ranjan The Microbiological Society of Korea 2006 The journal of microbiology Vol.44 No.1
Escherichia coli protein Rho is required for the factor-dependent transcription termination by an RNA polymerase and is essential for the viability of the cell. It is a homohexameric protein that recognizes and binds preferably to C-rich sites in the transcribed RNA. Once bound to RNA, it utilizes RNA-dependent ATPase activity and subsequently ATPase-dependent helicase activity to unwind RNA-DNA hybrids and release RNA from a transcribing elongation complex. Studies over the past few decades have highlighted Rho as a molecule and have revealed much of its mechanistic properties. The recently solved crystal structure could explain many of its physiological functions in terms of its structure. Despite all these efforts, many of the fundamental questions pertaining to Rho recognition sites, differential ATPase activity in response to different RNAs, translocation of Rho along the nascent transcript, interactions with elongation complex and finally unwinding and release of RNA remain obscure. In the present review we have attempted to summarize 'the knowns' and 'the unknowns' of the Rho protein revealed by the recent developments in this field. An attempt has also been made to understand the physiology of Rho in the light of its phylogeny.
Phenylbutazone의 란탄(III) 착물에 대한 합성, 스펙트럼 및 열적 연구
Anoop, M.R.,Binil, P.S.,Jisha, K.R.,Suma, S.,Sudarsanakumar, M.R. 대한화학회 2011 대한화학회지 Vol.55 No.4
1,2-diphenyl-4-butyl-3,5-pyrazolidinedione(phenylbutazone, PB)의 란탄(III) 착물을 합성하여 원소분석, 몰전기전도도 측정, IR, UV-Vis. 및 NMR 스펙트럼으로 특성을 조사하였다. 스펙트럼 데이터로부터 PB가 pyrazolidinedione 고리의 두 카르보닐 산소를 통해 이배위 및 일이온화 리간드로 배위됨을 규명하였다. 몰전기전도도 데이터로부터 이들 착물이 비전해질임을 규명하였다. 이들 착물의 열적 행동을 공기 중에서 TG 및 DTG로 연구한 결과, 탈수화, 열적 안전성 및 열분해에 관한 정보를 얻을 수 있었다. 최종 생성물은 해당 금속의 산화물로 밝혀졌다. 탈수화 및 분해 단계에 대한 열역학 및 반응속도 파라메터를 구하였다. 분해 단계에 대한 음의 엔트로피 값은 반응물보다 활성화 착물이 더 질서있는 구조를 갖는다는 것을 의미하며, 이때 반응은 정상보다 느렸다. 이러한 연구를 바탕으로 착물의 분자식이 $[Ln(PB)_3]{\cdot}5H_2O$(Ln=La 및 Ce) 그리고 $[Ln(PB)_3 (H_2O)_2]{\cdot}2H_2O$(Ln=Pr, Nd 및 Sm)임을 규명하였다. Lanthanide(III) complexes of 1,2-diphenyl-4-butyl-3,5-pyrazolidinedione(phenylbutazone, PB) have been synthesized and characterized by elemental analyses, molar conductance measurements, IR, UV-Vis. and NMR spectra. The spectral data reveal that the PB acts as a bidentate and mono-ionic ligand coordinating through both the carbonyl oxygens of the pyrazolidinedione ring. The molar conductance data suggest that the complexes are non-electrolytes. The thermal behaviour of the complexes was studied by TG and DTG in air atmosphere and the results provide information about dehydration, thermal stability and thermal decomposition. The final products are found to be the corresponding metal oxides. The thermodynamic parameters and kinetic parameters were evaluated for the dehydration and decomposition stages. The negative entropy values of the decomposition stages indicate that the activated complexes have a more ordered structure than the reactants and that the reactions are slower than normal. Based on these studies, the complexes have been formulated as $[Ln(PB)_3]{\cdot}5H_2O$(Ln=La and Ce) and $[Ln(PB)_3(H_2O)_2]{\cdot}2H_2O$(Ln=Pr, Nd and Sm).