E J Harper
Overview
Explore the profile of E J Harper including associated specialties, affiliations and a list of published articles.
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Articles
32
Citations
336
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Recent Articles
1.
Hambly C, Harper E, Speakman J
J Exp Biol
. 2004 Oct;
207(Pt 22):3977-84.
PMID: 15472028
Asymmetry is a difference in the sizes of bilaterally paired structures. Wing asymmetry may have an effect on the kinematics of flight, with knock-on effects for the energetic cost of...
2.
Hambly C, Harper E, Speakman J
J Exp Biol
. 2004 Oct;
207(Pt 22):3969-76.
PMID: 15472027
The effect of experimentally increased wing loading on the energy cost of flight was examined in cockatiels Nyphicus hollandicus. Five individuals were flown for periods of approximately 2 min, while...
3.
Hambly C, Pinshow B, Wiersma P, Verhulst S, Piertney S, Harper E, et al.
J Exp Biol
. 2004 Oct;
207(Pt 22):3959-68.
PMID: 15472026
Although most birds are accustomed to making short flights, particularly during foraging, the flight patterns during these short periods of activity differ between species. Nectarivorous birds, in particular, often spend...
4.
Borzacchiello A, Ambrosio L, Nicolais L, Harper E, Tanner K, Bonfield W
J Mater Sci Mater Med
. 2004 Sep;
9(12):835-8.
PMID: 15348949
The polymerization behavior of a new bone cement based on poly(ethylmethacrylate), hydroxyapatite powder and n-butylmethacrylate monomer and a commercial cement have been studied. Polymerization kinetics were analyzed by means of...
5.
Borzacchiello A, Ambrosio L, Nicolais L, Harper E, Tanner K, Bonfield W
J Mater Sci Mater Med
. 2004 Sep;
9(6):317-24.
PMID: 15348874
A new bone cement based on poly(ethylmethacrylate) (PEMA), hydroxyapatite powder (HA) and n-butylmethacrylate monomer (n-BMA) has been studied using isothermal and non-isothermal polymerization. Methacrylate monomers are highly reactive and release...
6.
Harper E, Braden M, Bonfield W, Dingeldein E, Wahlig H
J Mater Sci Mater Med
. 2004 Sep;
8(12):849-53.
PMID: 15348803
Bone cement, used to fix prostheses into the bone, must be sterilized prior to implantation. Two sterilization techniques, gamma and beta radiation, were investigated, examining the influence upon molecular weight,...
7.
Dalby M, Di Silvio L, Harper E, Bonfield W
J Mater Sci Mater Med
. 2004 Sep;
13(3):311-4.
PMID: 15348630
A bone cement, poly(ethylmethacrylate)/n-butylmethacrylate (PEMA/nBMA) has been developed with lower exotherm and monomer leaching compared to the traditional poly(methylmethacrylate)/methylmethacrylate (PMMA/MMA) cement. This study compares the in vitro biological response to...
8.
Opara T, Dalby M, Harper E, Di Silvio L, Bonfield W
J Mater Sci Mater Med
. 2004 Sep;
14(3):277-82.
PMID: 15348475
Poly(ethylmethacrylate) (PEMA) bone cement has been developed, and the cements mechanical properties are improved by the incorporation of particulate fillers, such as hydroxyapatite (HA). In this in vitro study, human...
9.
Harper E, Braden M, Bonfield W
J Mater Sci Mater Med
. 2004 Sep;
11(8):491-7.
PMID: 15347999
PEMA-based bone cement has previously been shown to possess many advantages over traditional PMMA cements. One of these is the option of adding up to 40 wt % HA without...
10.
Dalby M, Di Silvio L, Harper E, Bonfield W
J Mater Sci Mater Med
. 2004 Sep;
10(12):793-6.
PMID: 15347953
The nature of the orthopedic implant surface affects the interaction between cells and subsequent bone formation. The bone/cement interface in cement-held prostheses is considered to be the main cause of...