We are grateful to Professor Patrizio Neff for drawing our attention to an incorrect statement in the paper, to the effect that the conditions listed in ( In fact, these inequalities are shown in the paper to be necessary and sufficient for the polyconvexity of the function defined by (38). However, not every polyconvex, isotropic function is expressible in the form (38), and so the conditions (43), while sufficient for polyconvexity of an isotropic strain-energy function, are not necessary.
The successful utilization of ammonia in allylation reactions has little precedent (see: T. Nagano, S. Kobayashi J. Am. Chem. Soc. 2009, 131, 4200). The authors disclose a more general mono-allylation of ammonia through the development of an iridium-phosphoramidite complex which is stable to a large excess of the simple amine. The authors report a good variety of chiral amine products in high enantioselectivities and moderate yields.
We assess India’s inflation-targeting regime at the eight-year mark. The Reserve Bank of India continues to be a flexible inflation targeter: it responds to both the output gap and inflation when setting policy rates. It has become neither more hawkish nor more reactive with the transition to inflation-targeting. Evidence points to improved outcomes: inflation is lower and less volatile, inflation expectations are better anchored and the transmission of monetary policy is more effective. Given this record, radical changes such as broadening the RBI’s monetary mandate, abandoning the target in favour of a more discretionary regime, targeting core instead of headline inflation or altering the target and tolerance band would be risky and counterproductive. One obvious area for improvement entails updating the weight of food prices in the CPI basket. We estimate the correct weight of food at today’s per capita income to be closer to 40 per cent instead of the current 45.8 per cent. This would likely fall further to around 30 per cent in a decade from now due to the projected increase in per capita incomes. This correction should ameliorate concerns about the design and practice of the current inflation targeting regime. JEL Codes: E5, E52
ABSTRACT A novel phosphodiesterase (PdeA) was purified from Delftia acidovorans , the gene encoding the enzyme was cloned and expressed in Escherichia coli , and the recombinant enzyme was purified to apparent homogeneity and characterized. PdeA is an 85-kDa trimer that exhibits maximal activity at 65°C and pH 10 even though it was isolated from a mesophilic bacterium. Although PdeA exhibited both mono- and diesterase activity, it was most active on the phosphodiester bis( p -nitrophenyl)phosphate with a K m of 2.9 ± 0.1 mM and a k cat of 879 ± 73 min −1 . The enzyme showed sequence similarity to cyclic AMP (cAMP) phosphodiesterase and cyclic nucleotide phosphodiesterases and exhibited activity on cAMP in vivo when the gene was expressed in E. coli . The IS 1071 transposon insertion sequence was found downstream of pdeA .
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA Fischer-type silylene complex of platinum: [trans-(Cy3P)2(H)Pt:Si(SEt)2]BPh4Steven D. Grumbine, T. Don Tilley, Frederick P. Arnold, and Arnold L. RheingoldCite this: J. Am. Chem. Soc. 1993, 115, 17, 7884–7885Publication Date (Print):August 1, 1993Publication History Published online1 May 2002Published inissue 1 August 1993https://pubs.acs.org/doi/10.1021/ja00070a047https://doi.org/10.1021/ja00070a047research-articleACS PublicationsRequest reuse permissionsArticle Views557Altmetric-Citations113LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InRedditEmail Other access optionsGet e-AlertscloseSupporting Info (3)»Supporting Information Supporting Information Get e-Alerts
2483. [12] Jourdan et al. (2008), EPSL 265, 438449. [13] Koeberl (1988) Meteoritics 23, 161-165. [14] Albin et al. (2000) MAPS 35, 795-806. [15] Jourdan et al. (2007) GCA 71, 1214-1231. Fig.1 Melt rock samples, width ~4 cm (A and C). A – Thin section scan of hypocrystalline melt rock; B – SEM-BSE image of glassy melt, bright Opx laths, spherulitic Pl, dispersed Spl and assimilated quartz clast. C Thin section scan of holocrystalline melt rock; D – SEM-BSE image of crystallized melt with radial Plspherulites, few bright Opx, dispersed, bright Spl, some euhedral zoned sanidine and cordierite. Large Meteorite Impacts and Planetary Evolution IV (2008) 3093.pdf
Robots provide us with a means to move around in, visualize, and interact with a remote physical world. We have exploited these physical properties coupled with the growing diversity of users on the World Wide Web (WWW) [1] to create a WWW-based active telerobotic remote environment browser. This browser, called Mechanical Gaze, allows multiple remote WWW users to actively control up to six degrees of freedom of a robot arm with an attached camera to explore a real remote environment. The initial environment is a collection of physical museum exhibits which WWW users can view at various positions, orientations, and levels of resolution.
A study has been made of ambient-temperature fatigue-crack propagation behavior in P/M Al-Zn-Mg-Cu metal-matrix composites reinforced with either 15 or 20 vol.% silicon-carbide particulate, with specific emphasis on the role of SiC-particle size on the fatigue-crack growth threshold condition. It is found that measured threshold stress-intensity levels ΔK TH , are a function of both SiC-particle size and volume fraction; however, whereas coarse-particle distribution results in higher ΔK TH values at low load ratios, fine particles give higher threshold at high load ratios. Such behavior is analyzed in terms of the interaction of SiC particles with the crack path, both in terms of the promotion of (roughness-induced) crack closure at low load ratios and by crack trapping by particles. Consideration of the latter mechanism yields a limiting requirement for the intrinsic threshold condition in these materials that the maximum plastic-zone size must exceed the effective mean particle size; this implies that for near-threshold crack advance, the tensile stress in the matrix must exceed the yield strength of the material beyond the particle.
A model for the electromechanics of lipid bilayers, accounting for flexoelectricity, is obtained as the thin-film limit of the continuum electrodynamics of nematic liquid crystals.A priori restrictions on the polarization field consistent with minimum energy considerations effectively decouple the leading-order membrane problem from the computation of the self field, yielding a substantial simplification vis a vis the three-dimensional theory.Examples illustrate the strong interplay between the electric field and membrane geometry.
Abstract The diffusion mechanisms in P2 (prismatic) Na x CoO 2 are studied using ab initio molecular dynamics simulations and nudged elastic band calculations.
