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971.
972.
Udo Simon 《Results in Mathematics》1995,27(1-2):160-187
We solve the global existence and uniqueness problem for certain second order elliptic partial differential equations on projectively flat differentiable spheres. The emphasis is on the methods. As applications we prove some known and some new results about hyperovaloids in relative differential geometry. 相似文献
973.
974.
Hao C Campbell JL Verkerk UH Le Blanc JC Siu KW 《Journal of the American Society for Mass Spectrometry》2011,22(1):67-74
Herein we describe a new method, targeted enhanced multiply charged scans (tEMC), for the quantification of therapeutic peptides
in tandem mass spectrometry on the linear ion trap mass spectrometer. Therapeutic peptides with chain lengths between eight
and 39 amino acid residues and charge states from 2+ to 6+ were used to evaluate and illustrate the method which relies on
the ability to separate ions trapped in a linear ion trap according to their charges. In particular, interference from singly
charged ions on multiply charged ions can be effectively minimized. The method requires optimization of relatively few parameters,
the most important of which being the exit lens barrier (EXB) voltage, thereby offering substantial time saving in a high-throughput
quantification environment that currently relies on selected reaction monitoring. 相似文献
975.
Böhme R Mkandawire M Krause-Buchholz U Rösch P Rödel G Popp J Deckert V 《Chemical communications (Cambridge, England)》2011,47(41):11453-11455
Protein structures (cytochrome c) were visualized by TERS measurements on whole mitochondria referring to specific spectral features describing the electronic state of the heme moiety. 相似文献
976.
Luo X Liu Y Kubicek S Myllyharju J Tumber A Ng S Che KH Podoll J Heightman TD Oppermann U Schreiber SL Wang X 《Journal of the American Chemical Society》2011,133(24):9451-9456
Histone methylations are important chromatin marks that regulate gene expression, genomic stability, DNA repair, and genomic imprinting. Histone demethylases are the most recent family of histone-modifying enzymes discovered. Here, we report the characterization of a small-molecule inhibitor of Jumonji C domain-containing histone demethylases. The inhibitor derives from a structure-based design and preferentially inhibits the subfamily of trimethyl lysine demethylases. Its methyl ester prodrug, methylstat, selectively inhibits Jumonji C domain-containing his-tone demethylases in cells and may be a useful small-molecule probe of chromatin and its role in epigenetics. 相似文献
977.
Andreas Potschka Filip Logist Jan F. Van Impe Hans Georg Bock 《Numerical Algorithms》2011,57(2):217-233
In this paper we present a deterministic method for tracing the Pareto frontier in non-linear bi-objective optimization problems with equality and inequality constraints. We reformulate the bi-objective optimization problem as a parametric single-objective optimization problem with an additional Normalized Normal Equality Constraint (NNEC) similar to the existing Normal Boundary Intersection (NBI) and the Normalized Normal Constraint method (NNC). By computing the so called Defining Initial Value Problem (DIVP) for segments of the Pareto front and solving a continuation problem with a standard integrator for ordinary differential equations (ODE) we can trace the Pareto front. We call the resulting approach ODE NNEC method and demonstrate numerically that it can yield the entire Pareto frontier to high accuracy. Moreover, due to event detection capabilities available for common ODE integrators, changes in the active constraints can be automatically detected. The features of the current algorithm are illustrated for two case studies whose Matlab® code is available as Electronic Supplementary Material to this article. 相似文献
978.
Adamson P Auty DJ Ayres DS Backhouse C Barr G Betancourt M Bishai M Blake A Bock GJ Boehnlein DJ Bogert D Cao SV Cavanaugh S Cherdack D Childress S Coelho JA Corwin L Cronin-Hennessy D Danko IZ de Jong JK Devenish NE Diwan MV Dorman M Escobar CO Evans JJ Falk E Feldman GJ Frohne MV Gallagher HR Gomes RA Goodman MC Gouffon P Graf N Gran R Grzelak K Habig A Hartnell J Hatcher R Himmel A Holin A Huang X Hylen J Irwin GM Isvan Z Jaffe DE James C Jensen D Kafka T Kasahara SM Koizumi G Kopp S 《Physical review letters》2011,107(18):181802
We report the results of a search for ν(e) appearance in a ν(μ) beam in the MINOS long-baseline neutrino experiment. With an improved analysis and an increased exposure of 8.2 × 10(20) protons on the NuMI target at Fermilab, we find that 2 sin(2) (θ(23))sin(2)(2θ(13))<0.12(0.20) at 90% confidence level for δ = 0 and the normal (inverted) neutrino mass hierarchy, with a best-fit of 2sin(2) (θ(23))sin(2)(2θ(13)) = 0.041(-0.031)(+0.047) (0.079(-0.053) (+0.071)). The θ(13) = 0 hypothesis is disfavored by the MINOS data at the 89% confidence level. 相似文献
979.
Vidawati S Sitterberg J Rothe U Bakowsky U 《Colloids and surfaces. B, Biointerfaces》2011,87(2):209-216
The monomolecular organisation of symmetric, chemically modified tetraether lipids caldarchaeol-PO(4) was studied using Langmuir film balance, ellipsometry, and atomic force microscopy (AFM). Solid silicon wafer substrates were modified to hydrophobic, hydrophilic, and amino-silanised surfaces; and Langmuir-Blodgett (LB)-films were transferred onto each. LB-caldarchaeol-PO(4) films were subjected to further rinsing with organic solvent and additional physical treatments, to compare their resistance and stability on chemisorbed (amino-silanised) and physisorbed (hydrophobic and hydrophilic) surfaces. The resistance and stability of these monolayer films was characterized by ellipsometry and AFM, and film thickness was determined using ellipsometry. AFM was also employed to observe surface morphology. Monolayer films on hydrophobic surfaces were found to be more resistant to rinsing with organic solvent and additional physical treatments than monolayer films on either amino-silanised or hydrophilic surfaces. The hydrophobic effect with hydrophobic surfaces appears to support the formation of stronger caldarchaeol-PO(4) films on silicon wafer substrates, with increased resistance and stability. 相似文献
980.
Four optimal control problems of reservoir release are investigated. The first problem is to minimize the peak release in order to prevent flood and to reduce the flood height. The second problem is to maximize the lowest release in order to ensure irrigation, water supply, shipping and environment downstream. The third problem is to minimize the flooding duration in order to reduce damage to goods, possessions, plants, levees, etc. It is shown that these three problems may possess infinitely many different optimal solutions, but they all have a common optimal solution, which is the unique optimal solution of the fourth problem. Since this unique optimal solution depends continuously on the input data, the fourth problem is well-posed and it can be considered as a common regularization of the three ill-posed problems. 相似文献