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Parul Pandya Dhar (ed.), Indian Art History: Changing Perspectives, New Delhi: D.K. Printworld (P) Ltd. and National Museum Institute of History of Art, Conservation and Museology 2011  [PDF]
Book received
Journal of Art Historiography , 2011,
Abstract: Includes contents, introduction and index.
草莓DHAR基因密码子偏好性分析  [PDF]
北方园艺 , 2014,
Abstract: 以草莓为试材,运用CHIPS、CUSP和CodonW程序分析了草莓DHAR基因的密码子偏好性,并与大肠杆菌和酵母的基因组密码子偏好性及7种植物的DHAR基因密码子偏好性进行了比较,同时基于DHAR基因的密码子使用偏好性进行了系统聚类分析,以期在作物遗传改良中为草莓DHAR基因选择合适的遗传转化受体及进行基因优化提供依据。结果表明草莓DHAR基因更适合导入苹果等双子叶植物中,若要提高草莓DHAR基因在大肠杆菌或酵母中的表达水平,还需进行密码子的优化。
高山松及其亲本种油松和云南松DHAR基因的功能分化  [PDF]
考洪娜, 兰婷, 王晓茹, 曾庆银
植物学报 , 2012, DOI: 10.3724/SP.J.1259.2012.00001
Abstract: ?高山松(Pinusdensata)是油松(P.tabulaeformis)与云南松(P.yunnanensis)自然杂交产生的同倍性杂种,分布于青藏高原东南缘,占据了油松和云南松两个亲本种都不能正常生长的高海拔地带。为了揭示高山松、油松和云南松脱氢抗坏血酸还原酶(DHAR)基因的组成和功能分化,分别从高山松、油松和云南松中克隆到2类DHAR基因(DHAR1与DHAR2)。组织表达模式分析表明,这6个基因在根、韧皮部、叶和芽中均有表达;通过系统发育分析发现,高山松在物种形成过程中保留了油松的DHAR1拷贝以及云南松的DHAR2拷贝;酶学性质分析则表明,高山松与油松DHAR1蛋白对底物具有相似的催化活性、催化效率、最适pH和热力学稳定性,但其催化活性比云南松DHAR1蛋白高约300倍。高山松DHAR2蛋白对底物的催化活性和热力学稳定性均高于油松DHAR2蛋白。高山松DHAR基因在生化功能上显示出优于或类似亲本DHAR,这种优势功能的选择与杂种独特的生态适应性可能有重要的相关性。
Comment on ``Reexamination of experimental tests of the fluctuation theorem" by Narayan and Dhar  [PDF]
R. van Zon,E. G. D. Cohen
Physics , 2003,
Abstract: Our result in cond-mat/0305147 that, instead of the conventional heat fluctuation theorem (FT), a new FT holds for heat fluctuations for a Brownian particle in a moving confining potential[Wang et al. 2002], was claimed to be disproved in a very recent preprint by Narayan and Dhar, cond-mat/0307148. This comment is meant to show that their assertion is not correct. The point is that they formulate their FT differently than we do ours. Effectively, their FT speaks about a physically irrelevant limiting case of our new FT. This implies that the two \FT s are not in contradiction with each other. Furthermore, we point out an incorrect assumption in their derivation.
Dilip K. Chakrabarti 2003 A rchaeology in the Third World – A History of Indian Archaeology Since 1947. New Delhi: D.K. Printworld.
Tim Murray
Bulletin of the History of Archaeology , 2003, DOI: 10.5334/bha.13103
苹果脱氢抗坏血酸还原酶(dhar)基因cdna片段的克隆及序列分析  [PDF]
西北农林科技大学学报(自然科学版) , 2007,
Abstract: 以皇家嘎拉苹果叶片为材料提取总rna,合成cdna第一链后,先利用巢式pcr获得苹果脱氢抗坏血酸还原酶(dhar)基因中间片段,再利用3′-race方法进一步获得3′末端核酸序列,共得到840bp包含完整3′末端的dhar基因cdna片段,其序列与烟草、水稻、番茄中dhar基因序列的同源性均大于70%,证明所克隆到的核苷酸片段确为苹果dhar基因cdna片段。
Functional Divergence of Dehydroascorbate Reductase Genes in Pinus densata, P. tabulaeformis and P. yunnanensis

Hongna Kao,Ting Lan,Xiaoru Wang,Qingyin Zeng,

植物学报 , 2012,
Abstract: Plant dehydroascorbate reductase (DHAR) is a physiologically important reducing enzyme in the ascorbateglutathione recycling reaction. In this study, we cloned 6 DHAR genes from a hybrid pine species complex of Pinus densata, P. yunnanensis and P. tabulaeformis. P. densata originated by natural hybridization of P. yunnanensis and P. tabulaeformis. The 6 DHAR genes were divided into 2 types: DHAR1 and DHAR2. Phylogenetic analyses indicated that the 3 DHAR1 and 3 DHAR2 genes from the 3 Pinus species were 2 orthologous groups. DHAR1 and DHAR2 genes originated from an ancestral duplication event that occurred in the most recent common ancestor of the early land plants. P. densata contains a copy of DHAR1 similar to that of P. tabulaeformis and a copy of DHAR2 similar to that of P. yunnanensis. RT-PCR revealed that the 6 DHAR were constitutive expression genes in the 3 Pinus species. The recombinant Pinus DHAR proteins were overexpressed in E. coli and purified by Ni-affinity chromatography. P. densata and P. tabulaeformis DHAR1 proteins showed similar enzymatic activities, catalytic efficiency, thermal stabilities and optimal pH profiles towards substrate DHA but about 300-fold higher enzymatic activities than P. yunnanensis DHAR1 protein. The enzymatic activity and thermal stability of P. densata DHAR2 protein were higher than those of P. tabulaeformis DHAR2 protein. Joint analyses of sequence structure, phylogenetic relationships, expression patterns, enzymatic properties and protein 3-D structure revealed selective DHAR gene composition in the hybrid genome of P. densata. Such a combination of divergent copies of DHAR gene in P. densata may have adaptive implications for its colonization of novel habitats on the Tibetan Plateau.
A dynamical programming approach for controlling the directed abelian Dhar-Ramaswamy model  [PDF]
Daniel O. Cajueiro,Roberto F. S. Andrade
Physics , 2013, DOI: 10.1103/PhysRevE.82.031108
Abstract: A dynamical programming approach is used to deal with the problem of controlling the directed abelian Dhar-Ramaswamy model on two-dimensional square lattice. Two strategies are considered to obtain explicit results to this task. First, the optimal solution of the problem is characterized by the solution of the Bellman equation obtained by numerical algorithms. Second, the solution is used as a benchmark to value how far from the optimum other heuristics that can be applied to larger systems are. This approach is the first attempt on the direction of schemes for controlling self-organized criticality that are based on optimization principles that consider explicitly a tradeoff between the size of the avalanches and the cost of intervention.
Reply to Dhar's comment on "Can disorder induce a finite thermal conductivity in 1D lattices"  [PDF]
Baowen Li,Hong Zhao,Bambi Hu
Physics , 2001,
Abstract: In his comment, Dhar (cond-mat/0106349) claims that the existence and uniqueness of a nonequilibrium stationary state has been proved by Lebowitz et al. We should point out that our observation does not contradict the proof. They have only proved that when a (mass) disordered harmonic chain is placed in contact with stochastic reservoirs of the Langevin type, a nonequilibrium stationary state can be reached. However, they didn't prove the existence and uniqueness of the nonequilibrium stationary state for the general case, namely, when the chain is in contact with general thermostated reservoirs (see Bonneto et al. math-ph/0002052).
Xerophthalmia In urban Slum Children Of Delhi  [cached]
Kumar Avdhesh,Mehra Malti,Badhan S.K,Singh Saudan
Indian Journal of Community Medicine , 1998,
Abstract: Research question: What is the prevalence of xerophthalmia in urban slum children of Delhi? Objectives: 1. To determine the prevalence of xerophthalmia 2. To describe the prevalence by age, sex and parents literacy status. Study design: Cross- sectional study. Setting: Gokulpuri resettlement colony, Delhi. Participants: Under 15 children. Study Variables: Age, sex and parentsa€ literacy status. Outcome variable: Bitota€ s spot. Statistical analysis: Chi square test. Results: Overall prevalence of xerophthalmia was 1.2%. Higher prevalence was observed among children aged 10 years and above (1.7%) in comparison to under 5 children (0.6%). Conclusion: School going children also need to be subjected to oral vitamin A supplementation.
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