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Displaying 7876 - 7900 of 143796

Structure and Mechanical Properties of Poly (D,L-lactic Acid)Poly(e-caprolatone)Blends

October 12, 2021

Author(s)

M E. Broz, David L. VanderHart, N Washburn

A series of blends of the miscible, biodegradable polymers poly(D,L-lactic acid) and poly(e-caprolactone) were prepared varying mass fraction across the range of compositions. Tensile testing was performed at room temperature using an extensometer and the

Structure and Reactivity of the Hydrated Hematite (0001) Surface

October 12, 2021

Author(s)

T P. Trainor, Anne M. Chaka, P J. Eng, M Newville, G A. Waychunas, J G. Catalano, G E. Brown

Hematite (alpha-Fe 2 O 3 ) is significantly more reactive to water and metal ions than its isostructure corundum (alpha-Al 2 O 3u) under environmental conditions. However, the reason for this difference is not understood. Using crystal truncation rod

Structure Refinement of the High-Temperature Triclinc Form of BiTaO 4 From Neutron Powder Diffraction

October 12, 2021

Author(s)

P DeSanto, Winnie Wong-Ng, Zhi Yang, Jeremy C. Cook, B H. Toby

The structure of the high-temperature form of BiTaO4 has been refined using neutron powder diffraction data. The unit cell is triclinic, P (Sp. Gr. #2) with a = 7.66312(16) , b = 5.58825(11) , c = 7.78659(16) , ? = 90.0573(10)?, ? = 77.0388(9)?, and ? = 86

Structure-Property Evaluation of Photocured Homopolymers from Commercial and Experimental Dimethacrylates

October 12, 2021

Author(s)

J Tanka, J W. Stansbury

The development of new monomers that provide hydrophobic polymeric networks is under investigation with the goal of increasing the long-term durability of dental resins and composites. A variety of novel semifluorinated and hydrocarbon-based dimethacrylate

Studies of Natural Organic Matter (NOM) Rejection by Membrane Filtration: Part 1

October 12, 2021

Author(s)

J Cho, G Amy, J J. Pellegrino

Abstract not provided.

Study of Deformation of Cube-Textured Aluminum Using Laser-induced Photoelectron Emission

October 12, 2021

Author(s)

M Cai, Lyle E. Levine, J T. Dickinson

Deformation of a cube-oriented aluminum sample was monitored by the laser-induced photoelectron emission technique. A retarding field energy analyzer was applied to determine the energy distribution of photoelectrons. Due to the anisotropy of the surface

Study of Isochoric Specific Heat Capacity Measurements for Liquid Isobutane

October 12, 2021

Author(s)

Hiroyuki Miyamoto, Hiroshi Kitajima, Noboru Kagawa, Joe W. Magee, Seizo Tsuruno, Koichi Watanabe

Isobutane is one of the most promising alternative refrigerants because of its zero ODP and negligible GWP. It can be used not only as a pure component but also as a component of binary or ternary mixture refrigerants. To design and evaluate cycle

Study of Photodegradation of Epoxy Polymer by Using Slow Positron Annihilation Spectroscopy

October 12, 2021

Author(s)

R Zhang, Xiaohong Gu, H Chen, J Zhang, Y Li, Tinh Nguyen, T C. Sandreczki, Y C. Jean

Slow positron annihilation spectroscopy (SPAS) has been used to study the early stage of epoxy photodegradation. Spin-coated samples of a crosslinked epoxy were prepared by stoichiometrically mixing a diglycidyl ether of bisphenol A epoxy resin with 1,3

Sub-10-Femtosecond Active Synchronization Between Two Passively Mode-Locked Ti: Sapphire Oscillators

October 12, 2021

Author(s)

L -. Ma, R K. Shelton, H C. Kapteyn, M M. Murnane, Jun Ye

Two independent mode-locked femtosecond lasers are synchronized to an unprecedented precision. The remaining rms timing jitter betweenthe lasers is 4.3 fs observed within a 160 Hz bandwidth over tens of seconds, or 26 fs within a 50 kHz bandwidth. The

Subsolidus Phase Relationships in the AO-AI 2 O 3 -Nb 2 O 5 (A=Ca, Sr) Systems

October 12, 2021

Author(s)

Julia Y. Chan, Wilma Feb-Ayala, J. M. Loezos, L D. Rotter, Lyle E. Levine, Richard G. Geyer

Dielectric ceramics for wireless communications exhibiting modest permittivity, high quality factor (Q), and near-zero temperature coefficient are needed for high-frequency, high power applications. Efforts are in progress to replace Ta 2O 5-based ceramics

Superior Large-Scale Relaxation and Defectivity in SiGe Layers Grown on Pre-Threaded Si Substrates

October 12, 2021

Author(s)

M Erdtmann, M T. Currie, Joseph Woicik, David R. Black

State-of-the-art applications involving relaxed SiGe virtual substrates have a low tolerance for defectivity, i.e., threading dislocation density (TDD) and dislocation pile-up density (DPD). Yet in order for virtual substrates to achieve relaxation, it is

Superresolution Optical Pick-Up Using Phase Pupil Filter With a Solid Immersion Lens

October 12, 2021

Author(s)

B Veerappa, Xiao Tang

Superresolution phase pupil filter in conjunction with solid immersion lens for high density in optical data storage is described. The frequency response of the system is studied. A binary annular phase filter is used in this study. Simulation results are

Supplementary Comparison APMP.M.P-S2 (Bilateral Comparison) at a Nominal Pressure of 0.05 Pa

October 12, 2021

Author(s)

Pardeep Mohan, Patrick J. Abbott

High vacuum (10-1 to 10-4 Pa) standards are maintained by many of the world s National Metrology Institutes (NMI). For purposes of trade equity as well as scientific integrity, it is important that NMI s compare their standards and determine a degree of

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