197 research outputs found
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The Use of Growth Factors and Mesenchymal Stem Cells in Orthopaedics: In particular, their use in Fractures and Non-Unions: A Systematic Review.
AIM: The aim was to look at current evidence for treating non-unions or delayed fracture healing in regard to novel methods applying mesenchymal stem cells (MSCs) and growth factors (GF). METHODS: Pre-clinical and clinical trials focusing on the use of Mesenchymal Stem Cells and Growth Factors for fracture healing were included in this review. Published articles were identified using specific search terms in Medline, Cochrane Library, PubMed, Scopus and Web of Science. RESULTS: Of the 580 articles found, 82 met my selection criteria and were included, with 39 papers involving trials on the effects of GFs and MSCs on non-unions or bone repair. These included 11 articles on MSCs, 10 on Bone Morphogenetic Proteins, 2 on Vascular-Endothelial GF, 5 on Insulin like-GF, 4 on Transforming-GF-β, 4 on Platelet-Rich Plasma, 1 on Platelet Derived-GF and 2 on Fibroblast-GF, with the other articles included qualitatively. Overall results were positive with the addition of MSCs, Bone Morphogenetic Proteins, VEGF, IGF and TGF-β in aiding fracture healing compared to controls, with mixed results for other factors. CONCLUSION: Overall this review shows promising results regarding the use of MSCs and various Growth factors in the treatment of fractures and non-unions, as well as synergistic effects observed when combined together. However more research is indicated as these methods are still in the early stages of development
Education Par Excellence: Developing Personal Competencies and Character Through Philanthropy-based Education
This teaching note presents an innovation in accounting education called the Philanthropy Project. The Philanthropy Project emphasizes experiential learning and is designed to promote the learning of discipline-specific concepts while simultaneously addressing the social needs of the surrounding community. In the Philanthropy Project, students receive money to distribute to not-for-profit organizations (NFPs) based on a competitive proposal process they help to develop and administer. A distinguishing characteristic of this project is that it is not a simulation. Students make real decisions that have immediate consequences to certain groups of people in their own communities. They have to make difficult choices by allocating scarce resources to some agencies and saying “no” to other agencies, all with worthy causes.
The philanthropy project was administered in two introductory financial accounting classes, one at University A (a regional public university) and one at University B (a comprehensive private university). At the conclusion of the project, students reported experiencing the benefits of collaboration, communication, conceptual learning, community engagement, and character development. In addition to learning typical for-profit accounting topics, students participating in the philanthropy project also learned about NFP financial statements and related economic measures. Given the specified not-for-profit context, this project could be relevant for governmental and not-for-profit accounting classes. A timeline of activities, grading rubric, and templates are provided to aid in the adoption of this project by other accounting educators
Shadows of the Planck Scale: The Changing Face of Compactification Geometry
By studying the effects of the shape moduli associated with toroidal
compactifications, we demonstrate that Planck-sized extra dimensions can cast
significant ``shadows'' over low-energy physics. These shadows can greatly
distort our perceptions of the compactification geometry associated with large
extra dimensions, and place a fundamental limit on our ability to probe the
geometry of compactification simply by measuring Kaluza-Klein states. We also
discuss the interpretation of compactification radii and hierarchies in the
context of geometries with non-trivial shape moduli. One of the main results of
this paper is that compactification geometry is effectively renormalized as a
function of energy scale, with ``renormalization group equations'' describing
the ``flow'' of geometric parameters such as compactification radii and shape
angles as functions of energy.Comment: 7 pages, LaTeX, 2 figure
Upsilon Decay to a Pair of Bottom Squarks
We calculate the rate for decay into a pair of bottom squarks as a
function of the masses of the bottom squark and the gluino. Data from decays of
the states could provide significant new bounds on the existence and
masses of these supersymmetric particles.Comment: 10 pages, latex, 2 figure
A solution to the mu problem in the presence of a heavy gluino LSP
In this paper we present a solution to the problem in an SO(10)
supersymmetric grand unified model with gauge mediated and D-term supersymmetry
breaking. A Peccei-Quinn symmetry is broken at the messenger scale GeV and enables the generation of the term. The boundary
conditions defined at lead to a phenomenologically acceptable version of
the minimal supersymmetric standard model with novel particle phenomenology.
Either the gluino or the gravitino is the lightest supersymmetric particle
(LSP). If the gravitino is the LSP, then the gluino is the next-to-LSP (NLSP)
with a lifetime on the order of one month or longer. In either case this heavy
gluino, with mass in the range 25 - 35 GeV, can be treated as a stable particle
with respect to experiments at high energy accelerators. Given the extensive
phenomenological constraints we show that the model can only survive in a
narrow region of parameter space resulting in a light neutral Higgs with mass
GeV and . In addition the lightest stop
and neutralino have mass GeV and GeV,
respectively. Thus the model will soon be tested. Finally, the invisible axion
resulting from PQ symmetry breaking is a cold dark matter candidate.Comment: 30 pages, 9 figure
Daily quantification of myoglobin forms on beef longissimus lumborum steaks over 7 days of display by near-infrared diffuse reflectance spectroscopy
Near-infrared diffuse reflectance spectroscopy (NIR-DRS) was utilized to develop an algorithm using approximately 18 wavelengths spanning 480 to 650 nm to determine oxymyoglobin (OxyMb), deoxymyoglobin (DeoxyMb), and metmyoglobin (MetMb) contents on beef longissimus lumborum muscles. Daily changes in subsurface myoglobin redox forms were evaluated for 7 d using NIR-DRS and compared with the surface color as assessed by a HunterLab MiniScan spectrophotometer as a reference modality. Both measurements revealed that MetMb increased steadily over the duration of display, showing high correlation (R2 = 0.91) between the 2 methods. Comparatively, whereas NIR-DRS revealed OxyMb to have decreased steadily over the period of display, the HunterLab MiniScan spectrophotometer indicated a much later onset of the apparent decrease of OxyMb, resulting in a moderate correlation (R2 = 0.64) between the 2 methods. No correlation was found between the 2 methods regarding the changes of DeoxyMb over the duration of display. The newly developed NIR-DRS algorithm has potential as an alternative method of color assessment in postrigor skeletal muscle.Electrical and Computer EngineeringAnimal and Food Science
Ultra High Energy Cosmic Rays from Sequestered X Bursts
Assuming that there is no GZK (Greisen-Zatsepin-Kuzmin) cut-off and that
super-GZK cosmic rays correlate with AGN (Active Galactic Nuclei) at
cosmological distances, it is speculated that a relic superheavy particle (X)
has its lifetime enhanced by sequestration in an extra dimension. This
sequestration is assumed to be partially liberated by proximity of merging
supermassive black holes in an AGN, temporarily but drastically reducing the
lifetime, thus stimulating an X burst. Based on sequestration of the decay
products of X, a speculative explanation of the observed ratio is
proposed.Comment: 12 pages LaTe
Effect of mitochondrial inhibitor on fresh meat color
Oxygen consumption is a muscle property that influences beef color. A greater amount of oxygen consumption results in less bloom and darker meat color while lower oxygen consumption produces a more desirable, bright, cherry red color. In postmortem muscles, mitochondria are greatly involved with the process of oxygen consumption. This research investigates the addition of Rotenone as a mitochondrial inhibitor to analyze the inhibition of ATP Synthesis in the mitochondria.Lew Wentz FoundationAnimal and Food Science
Diagnosing Spin at the LHC via Vector Boson Fusion
We propose a new technique for determining the spin of new massive particles
that might be discovered at the Large Hadron Collider. The method relies on
pair-production of the new particles in a kinematic regime where the vector
boson fusion production mechanism is enhanced. For this regime, we show that
the distribution of the leading jets as a function of their relative azimuthal
angle can be used to distinguish spin-0 from spin-1/2 particles. We illustrate
this effect by considering the particular cases of (i) strongly-interacting,
stable particles and (ii) supersymmetric particles carrying color charge. We
argue that this method should be applicable in a wide range of new physics
scenarios.Comment: 5 pages, 4 figure
Single gluino production in the R-parity lepton number violating MSSM at the LHC
We examine the -violating signal of single gluino production
associated with a charged lepton or neutrino at the large hadron collider
(LHC), in the model of R-parity relaxed supersymmetric model. If the parameters
in the supersymmetric interactions are not too small, and the
mass of gluino is considered in the range from several GeV (as the Lightest
Supersymmetric Particle) to 800 GeV, the cross section of the single gluino
production via Drell-Yan processes can be in the order of
femto barn, and that via gluon fusion in the order of femto
barn. If the gluino decay can be well detected in the CERN LHC, this process
provides a prospective way to probe supersymmetry and violation.Comment: LaTex, 22 pages, 5 EPS file
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