Sökresultat

Filtyp

Din sökning på "*" gav 531317 sökträffar

Understanding the 3D structure of GaAs nanowires

The effects of lamellar twinning in epitaxial particle-assisted GaAs B nanowires are investigated in an extensive high resolution electron microscopy (HRTEM) study of the low index zones , , and . As these directions are non-parallel to the (-1-1-1) twin planes we find that the twin segments exhibit two different zone axes as a consequence of twinning. In the first three cases the alternative zon

Morphology, evolution and stratigraphic distribution in the Middle Ordovician conodont genus Microzarkodina

Microzarkodina is a genus of mainly Middle Ordovician conodonts that has its centre of distribution in Baltoscandia, and much less commonly occurs in southern China, Australia, Argentina and Laurentia. In Baltica a series of species, Microzarkodina russica n. sp., M. flabellum, M. parva, M. Bella, M. Hagetiana and M. ozarkodella, established themselves successfully. The succession of species range

Photocurrent Spectra and Fast Kinetic Studies of P3HT/PCBM Mixed with a Dye for Photoconversion in the Near-IR Region

Photoconversion properties are demonstrated for a device based on a small dye molecule, absorbing light in the near-IR region, mixed with two organic charge transport materials and together forming a dye-sensitized organic bulk heterojunction. The organic dye molecule, phthalocyanine (1,4,8,11,15,18,22,25-octabutoxy-29H,31H-phthalocyanine), mixed with a blend of poly(3-hexylthiophene) (P3HT) and 1

Evaluation of third trimester uterine artery flow velocity indices in relationship to perinatal complications.

Objective. Uterine artery Doppler is becoming a routine part of pregnancy surveillance in high-risk pregnancies. Which blood flow velocity waveform index to measure is debated and the 'notch' in early diastole is not widely accepted, as it is a subjective measure. The aim of the present study was to evaluate the different indices in the prediction of adverse outcome of pregnancies suspected for in

Two 3D supramolecular architectures from zinc hydrogen aconitate 1D polymers

The reaction of Zn(NO3)(2)center dot 3(H2O) with trans-aconitic acid, in presence of chelating Lewis bases, leads to the formation of the 1D polymers [Zn(N-N)(LH)] center dot nH(2)O, where LH3 = trans-aconitic acid, 1 : N-N = 1,10-phenanthroline (phen), n = 1, 2 : N-N = 2,2'-bipyridine (bpy), n = 2. 3D supramolecular assemblies are constructed through H-bonding and stacking interactions. (C) 2006

Why Sarus Cranes epitomize Karunarasa in the Ramayana

By correlating literary evidence, avian ethology and neurophysiology I will try to demonstrate why Valmiki chose a pair of Sarus Cranes, and not any other avian species, to epitomise grief and sorrow in the Ramayana. This choice illustrates the importance of personal experience of the living reality (behaviour of Sarus Cranes); but the grief, soka, as experienced by Valmiki, became in later critic

Utilizing nanofabrication to construct strong, luminescent materials

Luminescent materials have been utilized widely in applications from lighting to sensing. The new development of technologies based on luminescence requires the materials to have high luminescence efficiency and mechanical strength. In this paper, we report the fabrication of luminescent materials possessing high mechanical strength by nanofabrication with polyvinyl alcohol used as a stabilizer or

A salutogenic investigation and treatment of conduct disorder (CD)

This article reports results from a long-term follow-up of adolescents with conduct disorder who have been patients at an inpatient child psychiatric unit in Lund, Sweden. Up to now, a total of 186 adolescents have participated in the follow-up study. The subjects are a heavily symptom-loaded group with many problems during their childhood. The study includes self-rating that describe psychiatric

Ultrawideband propagation channels - Theory, measurement, and modeling

This paper presents an overview of ultrawideband (UWB) propagation channels. It first demonstrates how the frequency selectivity of propagation processes causes fundamental differences between UWB channels and "conventional" (narrowband) channels. The concept of pathloss has to be modified, and the well-known WSSUS model is not applicable anymore. The paper also describes deterministic and stochas

Expression of the AMBP gene transcript and its two protein products, alpha(1)-microglobulin and bikunin, in mouse embryogenesis

The expression pattern of the alpha(1)-microglobulin/bikunin precursor (AMBP) gene, and its two protein products were studied in mouse embryos of 8.5-15.5 days of embryonic development by in situ hybridization and immunohistochemistry. AMBP mRNA is strongly transcribed in liver parenchyma, pancreas, and intestine epithelium. Sites of weaker expression are the vessels of the umbilical cord, the dev

Analysis of sex-linked sequences supports a new mammal species in Europe

European mammals have been the focus of particularly detailed taxonomic studies by traditional morphological methods. However, DNA analyses have the potential to reveal additional, cryptic species. We describe two highly divergent evolutionary lineages within a small Eurasian mammal, the field vole (Microtus agrestis). We show that the two lineages can be detected not only with maternally (mitocho

Vildagliptin: an inhibitor of dipeptidyl peptidase-4 with antidiabetic properties.

Vilclagliptin is a competitive and reversible inhibitor of dipeptidyl peptidase-4. Dipeptidyl peptidase-4 inhibitors act mainly by preventing the rapid degradation of glucagon-like peptide-1. In clinical trials, vildagliptin improves glycaemic control both as monotherapy and in combination with metformin for periods of :! 52 weeks in subjects with Type 2 diabetes. This is evident by reduced fastin