Materials Literature
文献浏览
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
Am Puls der Zeit:Berlin '95 / Hot Spot: Berlin '95
Impressum/Masthead
Neuheiten/Products
Energieaufwendungen zum Erreichen einer minimalen Strukturviskosität / Energy Input to Attain a Minimum Viscosity
Veranstaltungen/Calendar
NEMD-Computersimulation zur Rheologie von Polymerschmelzen / NEMD Computer Simulation of Polymer Melt Rheology
Referate/Abstracts
Linear-viskoelastischer Bereich bei reinen Fluiden und deren Suspensionen / Linear Viscoelastic Region Exhibited by Pure Fluids and their Suspensions
Patente/Patents
Firmenseminare/ Company Seminars
Sampling Devices for the Measurement of Seed Rain and Hydrochory in Rivers
the bucket with bottom removed, and two 2-liter beverage bottles for flotation. The total cost of one pair of seed rain and hydrochore traps was less than $1.00. The seed dispersal estimates from the aquatic seed traps reflected the relative numbers of species and seeds dispersed in aquatic systems. A test of the effi…
Average widths of grain boundaries in nanophase alloys synthesized by mechanical attrition
Many binary ferrous alloys were synthesized by mechanical attrition in a high-energy ball mill. X-ray diffractometry and transmission electron microscopy were used to measure grain sizes, which were as small as a few nanometers in several alloys. The nanocrystalline alloys showed new features in their Mössbauer spectr…
Structural changes ofZrO2-CeO2solid solutions around the monoclinic-tetragonal phase boundary
High-resolution neutron-diffraction experiments have been performed to study the structural changes of ${\mathrm{ZrO}}_{2}$ induced by ${\mathrm{CeO}}_{2}$ doping. The crystal structures of monoclinic [P${2}_{1}$/c, Z=4] and tetragonal [P${4}_{2}$/nmc, Z=2] phases for ${\mathrm{ZrO}}_{2}$--X mol % ${\mathrm{CeO}}_{2}$…
Vibrational analysis of poly(L‐lactic acid)
Abstract The Raman and IR spectra of poly( L ‐lactic acid) in the amorphous and semicrystalline states were recorded from 3600 to 100 cm −1 . Complete vibrational assignments are proposed. In the Raman spectra, the splittings of the v C=O stretching and the δCCO bend are characteristic of the crystalline phase and the…
Introduction to living polymeriz. Living and/or controlled polymerization
Abstract The effects of various imperfections such as slow initiation, termination, transfer and slow exchange on kinetics, molecular weights and polydispersities in chain growth polymerizations are simulated. The simukations demonstrate that well defined polymers polymers can be prepared in systems with chain‐breakin…
Magneto-structural correlations in .mu.2-1,1-azide-bridged dicopper(II) complexes. 2. Dominant antiferromagnetic coupling with azide bridge angles exceeding 108.degree.. X-ray Structures of [Cu2(PAP)(.mu.2-N3)Br3].cntdot.CH2Cl2, [Cu2(PAP6Me)(.mu.2-N3)(.mu.2-Br)Br2].cntdot.1.68H2O, [Cu2(PAP6Me)(.mu.2-N3)(.mu.2-H2O)(NO3)2](NO3).cntdot.0.75CH3OH, [Cu2(PAN)(.mu.2-N3)(.mu.2-NO3)(NO3)2].cntdot.CH3OH.cntdot.CH3CN, and [Cu2(PPD35Me)(.mu.2-N3)Br3(CH3OH)]
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMagneto-structural correlations in .mu.2-1,1-azide-bridged dicopper(II) complexes. 2. Dominant antiferromagnetic coupling with azide bridge angles exceeding 108.degree.. X-ray Structures of [Cu2(PAP)(.mu.2-N3)Br3].cntdot.CH2Cl2, [Cu2(PAP6Me)(.mu.2-N3)(.mu.2-Br)Br2].cntdot.1.…
PHTHALOCYANINE FLUORESCENCE AT HIGH CONCENTRATION: DIMERS OR REABSORPTION EFFECT?
Abstract— For tetrasulfonated aluminum phthalocyanine (AlPcS 4 ), dimer formation is characterized in the absorption spectrum by a broadening of the Q‐band and the appearance of a new band at the red edge of the spectrum. The high concentrations required to produce dimers, however, often leads to anomalous observation…
X‐ray photoelectron spectroscopy investigation of pumice‐supported nickel catalysts
Abstract Pumice‐supported nickel catalysts, prepared by the method of slow homogeneous precipitation with urea, were analysed by x‐ray photoelectron spectroscopy (XPS). By comparison with similarly prepared silica‐ and alumina‐supported nickel catalysts, a preferential interaction of Ni 2+ with Al 3+ of the support ha…
Grain Size Dependence of Hardness in Dense Submicrometer Alumina
Pressureless sintered alumina compacts with a submicrometer microstructure exhibit a hardness that approaches or even exceeds the level of advanced hotpressed composites of Al 2 O 3 + 35 vol% TiC, whereas the strength of both ceramics is approximately the same. The combination of reduced dislocation mobility (due to t…