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Displaying 51 - 75 of 1646

Properties of Elastomeric Calcium Phosphate Cement-Chitosan Composites

December 1, 2003
Author(s)
Shozo Takagi, Laurence C. Chow, S Hirayama, F Eichmiller
… Self-hardening calcium phosphate cements (CPC) have been shown to be efficacious in … The CPC powder was an equimolar mixture of tetracalcium phosphate and dicalcium phosphate anhydrous. Cement specimens were prepared by mixing … calcium phosphate cement, chitosan, chitosan derivatives, dicalcium …

Histopathological Reactions of Calcium Phosphate Cements in Periodontal Bone Defect

June 14, 1995
Author(s)
K Fujikawa, A Sugawara, S K. Kusama, S Murai, M Nishiyama, I Moro, Shozo Takagi, Laurence Chow
… Previous studies have demonstrated that a calcium phosphate cement (CPC), consisting of tetracalcium phosphate (TTCP) and dicalcium phosphate anhydrous (DCPA), and a new calcium phosphate … bone defect, calcium phosphate, cement, histopathology, osteoconductivity, …

MEASUREMENTS OF EFFECTIVE DIFFUSION COEFFICIENT OF HELIUM AND HYDROGEN THROUGH GYPSUM

September 14, 2011
Author(s)
Jiann Yang, William M. Pitts, Marco Fernandez, Kuldeep Prasad
… to obtain effective diffusion coefficients of helium and hydrogen (released as forming gas for safety reasons) through … gypsum panel was 1.3 × 10-5 m2/s and 1.4 × 10-5 m2/s for hydrogen. … Diffusion, Dispersion, Fire Safety, Garage, Gypsum, Helium, Hydrogen, Sensors …

Effect of Powder Grinding on Hydroxyapatite Formation in a Polymeric Calcium Phosphate Cement Prepared from Tetracalcium Phosphate and Poly[Methyl Vinyl Ether-Maleic Acid]

November 1, 1998
Author(s)
Y Matsuya, S Matsuya, Joseph M. Antonucci, S. Takagi, Laurence C. Chow, A Akamine
… vinyl ether-maleic acid) (PMVE-Ma) and tetracalcium phosphate (TTCP) resulted in hydroxyapatite (OHAp) formation. … the mechanical strength of this type of polymeric calcium phosphate cement was evaluated.Cements were prepared by … solution of PMVE-Ma (mass fraction = 25%) and tetracalcium phosphate powders ground for various periods of time. The …

A NUMERICAL STUDY OF THE RELEASE AND DISPERSION OF A BUOYANT GAS IN PARTIALLY CONFINED SPACES

March 4, 2011
Author(s)
Kuldeep R. Prasad, William M. Pitts, Jiann C. Yang
… Development of the hydrogen economy will require a better understanding of the … and explosions associated with the unintended release of hydrogen within a structure. The ability to predict the mixing and dispersion behavior of hydrogen, when accidentally released in a partially confined …

Urethane Methacrylate Resin Based Amorphous Calcium Phosphate Composites

October 22, 2003
Author(s)
W F. Regnault, Drago Skrtic, Joseph M. Antonucci
… properties of potentially bioactive amorphous calcium phosphate composites derived from three types of urethane … buffered saline, and the release patterns of calcium and phosphate ions were influenced by the structure of the … amorphous calcium phosphate, biaxial flexure strength, composites, ion release …

Setting Kinetics of Calcium Phosphate Cement by Dielectric Spectroscopy

October 16, 2008
Author(s)
H J. Mueller, R W. Hirthe
… Calcium phosphate cements (CPC) are useful because of their excellent … reaction involving equimolar quantities of tetracalcium phosphate (TTCP, Ca4(PO4)2O) and dicaalcium phosphate anhydrous (DCPA, CaHPO4) with water proceeds by … calcium phosphate cements, complex plane impedance plots, dicalcium …

FCGR of Pipeline Steels in Pressurized Hydrogen Gas: A Comparison of Cyclic Loading Rates

May 5, 2014
Author(s)
Elizabeth S. Drexler, Andrew J. Slifka, Robert L. Amaro, Damian S. Lauria
… A gaseous hydrogen environment is believed to have a deleterious effect … conducting tests at sufficiently slow rates in a gaseous hydrogen environment can be prohibitively long and expensive, … at cyclic loading rates of 1 Hz, 0.1 Hz, and 0.01 Hz in a hydrogen gas environment pressurized to 5.5 MPa or 34 MPa. …

Neutron Imaging Studies of Metal-Hydride Storage Beds

December 1, 2010
Author(s)
David Jacobson, Daniel Hussey, Elias Baltic, Terrence J. Udovic, John J. Rush, Robert C. Bowman
… transient and steady-state distributions, respectively, of hydrogen within a prototypical, LaNi4.78Sn0.22-based hydrogen storage bed during and after various absorption and … steps. It was shown that using deuterium instead of hydrogen enabled the imaging of thicker beds. These …

Calcium Phosphate Cements: Chemistry, Properties, and Applications

August 1, 2000
Author(s)
Laurence C. Chow
… This paper reviews recent studies on self-setting calcium phosphate cements (CPC). Discussions are focused on the … of CPC are considerably lower than ceramic calcium phosphate biomaterials and are also lower than some of the … bone graft, calcium phosphate cements, hydroxyapatite, solubility pahse diagram, …

Polymer Matrix Effects on the Properties of Amorphous Calcium Phosphate-Filled Composites

April 1, 2001
Author(s)
Drago Skrtic, Joseph M. Antonucci, D E. Eanes
… Calcium phosphate are funding increasing use as biomaterials, e.g. in … final stable product in the precipitation of calcium and phosphate ions from neutral or basic solutions and it is also … when precipation occurs spontaneously, amorphous calcium phosphate (ACP) precedes the formation of HAP. ACP, a …

Injectable and Macroporous Calcium Phosphate Cement Scaffold

August 1, 2006
Author(s)
Hockin D. Xu, Michael Weir, Elena F. Burguera, A M. Fraser
… Calcium phosphate cement (CPC) can be molded and self-harden in vivo … %, 30 %, 40 % and 50 %. The cement liquid contained sodium phosphate as a hardening accelerator and hydroxypropyl … bone repair, calcium phosphate cement, injectability, macroporous scaffold, …

Hydroxyapatite Formation in a Calcium Phosphate Cement Under Different Storage Conditions

October 12, 2021
Author(s)
S Hirayama, Shozo Takagi, T Ikemi, Laurence Chow
… A water-activated self-hardening calcium phosphate cement (CPC) has been the subject of considerable … as a bone graft material. A CPC derived from tetracalcium phosphate (TTCP) and dicalcium phosphate anhydrous (DCPA) hardens in 30 min with the … calcium phosphate cement, diametral tensile strength, dicalcium …

Hydrogen embrittlement in ferritic steels

October 6, 2020
Author(s)
May L. Martin, Matthew J. Connolly, Frank W. DelRio, Andrew J. Slifka
… The deleterious effects of hydrogen on the physical properties of metals have been known … there are still significant questions related to the “hydrogen embrittlement” of ferritic steels due to … steels coupled with the global difficulties with gauging hydrogen content in all materials. However, recent …

Advances in Weld Hydrogen Sensors

June 1, 2002
Author(s)
David Olson, B. Mishra, R D. Smith, S. Niyomsoan, P. Termsuksawad, Y D. Park, V I. Kaydanov, Z Gavra, Ronald B. Goldfarb
… the application of modern physics concepts, advanced hydrogen sensors are being developed for rapid determination of weld hydrogen content and distribution. Electronic, optical, and … have demonstrated the ability to measure and monitor the hydrogen content in alloys. These advanced electronic-based …

LiBH 4 &#8226NH 3 BH 3 : A New Lithium Borohydride Ammonia Borane Compound with a Novel Structure and Favorable Hydrogen Storage Properties

July 1, 2012
Author(s)
Junhong Luo, Hui Wu, Wei Zhou, Xiangdong Kang, Zhanzhao Fang, Ping Wang
… heating to 450°C, totally yielding approximately}15.7 wt% hydrogen. In comparison with the LiBH6d4^ component phase, … International Journal of Hydrogen Energy … hydrogen storage, dehydrogenation, crystal structure, ammonia … Borane Compound with a Novel Structure and Favorable Hydrogen Storage Properties …

Mechanical Strength of Various Types of Calcium Phosphate Cements

October 12, 2021
Author(s)
Y Matsuya, S Matsuya, Joseph M. Antonucci, S. Takagi, Laurence Chow, A Akashi, A Akamine
… It has been reported that organic or polymeric calcium phosphate cements can be made from reactive calcium … and in vitro durability of several types of calcium phosphate cements were assessed.Two commercial cements and … were tested in this study. Three sizes of tetracalcium phosphate (TTCP) particles, fine, medium and coarse, were …

Formation of Macropores in Calcium Phosphate Cements Through the Use of Mannitol Crystals

January 1, 2001
Author(s)
Milenko Markovic, Shozo Takagi, Laurence C. Chow
… 100 m to {nearly equal to} 400 m were mixed with calcium phosphate cement (CPC) powders that contained equimolar amounts of tetracalcium phosphate and dicalcium phosphate anhydrous. CPC-mannitol mixtures with mass … calcium phosphate cement, hardening time, macropores, mannitol, …

Current status of transport properties of hydrogen

August 21, 2007
Author(s)
Jacob W. Leachman, Bryce Jacobson, Steven Penoncello, Marcia L. Huber
… This paper contains an analysis of transport properties of hydrogen, particularly thermal conductivity and viscosity, … the current standard transport property models for normal hydrogen and parahydrogen, which are based on measurement and … the current transport property standards for both normal hydrogen and parahydrogen are included in the comparisons. …

Testing the Performance of Hydrogen Sensors

September 8, 2009
Author(s)
Nathan D. Marsh, Thomas G. Cleary
… The acceptance of hydrogen as a widely-available energy source will depend to … on the perceived and actual safe dispensing and storage of hydrogen by the general public. Reliable detection of an accidental hydrogen gas release and mitigation of the hazard through …

Hydrogen-Induced Cracking and Blistering in Steels: A Review

March 31, 2022
Author(s)
May Ling Martin, Petros Sofronis
… understanding of the corrosion phenomenon known as Hydrogen-Induced Cracking (HIC). HIC is defined as cracking … where cracking is driven by the precipitation of gaseous hydrogen molecules within the crack, which typically occurs … phenomenon, encompassing a surface reaction for hydrogen uptake, hydrogen diffusion to vulnerable …

Method Validation and Standards in Hydrogen/Deuterium Exchange Mass Spectrometry

March 1, 2016
Author(s)
Jeffrey W. Hudgens, Richard Y. Huang, Emma D'Ambro
… measurement standards for measuring protein dynamics by hydrogen/deuterium exchange mass spectrometry. Topics … Hydrogen-Deuterium Exchange Mass Spectrometry: Fundamentals, … Hydrogen/Deuterium Exchange, Mass Spectrometry, Method … Method Validation and Standards in Hydrogen/Deuterium Exchange Mass Spectrometry …
Displaying 51 - 75 of 1646
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