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Search Results: 1 - 10 of 9576 matches for " Marc "
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Editorial Article for the Journal of Microscopy Research  [PDF]
Marc Porti
Microscopy Research (MR) , 2013, DOI: 10.4236/mr.2013.12002
Abstract: Editorial; MR
Ionic Group Derivitized Nano Porous Carbon Electrodes for Capacitive Deionization  [PDF]
Marc Andelman
Journal of Materials Science and Chemical Engineering (MSCE) , 2014, DOI: 10.4236/msce.2014.23002

Capacitance for electrostatic adsorption forms primarily within a Debye length of the electrode surface. Capacitive carbon electrodes were derivatized with ionic groups by means of adsorbing a surfactant in order to test the theory that attached ionic groups would exclude co-ions and increase coulombic efficiency without the need for an added charge barrier membrane. It has been discovered that capacitive electrodes surface derivatized with ionic groups become polarized and intrinsically more coulombically efficient.

Soldner Had Found in 1802 the Deflection of the Light by the Sun as the General Relativity Shows  [PDF]
Marc Mignonat
Journal of Modern Physics (JMP) , 2018, DOI: 10.4236/jmp.2018.98095
Abstract: Systematically, it is written in the literature that only the general relativity (GR) allows finding the just value of the deflection of the light by the sun. Yet, we noted, by reading over the original text of SOLDNER of 1801: “Ueber die Ablenkung eines Lichtstrals von seiner geradlinigen Bewegung, durch die Attraktion eines Weltkörpers, the welchem er nahe vorbei geht” (that we think it is important to put in English in full in Appendix) that, contrary to what we read since about 100 years, he found the right value. Soldner had started from a Newtonian gravitational calculation and, with the value of 1801, find 1.64”. This calculation, with the actual values, allows finding the right value of 1.752”. There are reasons to explain the wrong calculations which we usually make. However, there is no epistemological reason for questioning the general relativity. Some observations are only explained by the GR. But the Newtonian calculations are much simpler. We can continue to say that the theory of Newton is incomplete but we cannot say it is false.
A Simplified Nonlinear Generalized Maxwell Model for Predicting the Time Dependent Behavior of Viscoelastic Materials  [PDF]
Marc Delphin Monsia
World Journal of Mechanics (WJM) , 2011, DOI: 10.4236/wjm.2011.13021
Abstract: In this paper, a simple nonlinear Maxwell model consisting of a nonlinear spring connected in series with a nonlinear dashpot obeying a power-law with constant material parameters, for representing successfully the time-dependent properties of a variety of viscoelastic materials, is proposed. Numerical examples are performed to illustrate the sensitivity of the model to material parameters.
Using Clinical Case Studies to Teach Biochemistry in a Doctoral Program: A Descriptive Paper  [PDF]
Marc P. McRae
Creative Education (CE) , 2012, DOI: 10.4236/ce.2012.37174
Abstract: Introduction: Biochemistry has traditionally been taught through lectures and rote memorization paying little attention to nurturing key problem solving skills. The literature on clinical case studies utilized in health education indicates that case studies facilitate and promote active learning, help clinical problem solving and encourage the development of critical thinking skills. Methods: This paper describes a method of using clinical case studies to deepen and solidify the students understanding of biochemical facts and concepts as related to clinical medicine. Discussion: Clinical case studies can be a helpful adjunct for teaching the content of human biochemistry that complements the traditional approach of lecture, textbook and laboratory. The learning issues presented to the students required them to reformulate biochemical concepts in their own words, integrate diverse principles and decide what information was important and what was superfluous. Limitations include a small subset of students riding the coat tails of their more ambitious peers, and biochemistry professors not having the confidence to take the students through a clinical case study because they may feel like they do not have sufficient “clinical expertise”. Conclusion: Clinical case studies are a valuable addition to the traditional methods of lecture, textbook reading and laboratory for teaching biochemistry. More importantly clinical case studies help remind students that what they are learning has relevance in the real world, and may help motivate students to pay more attention to the numerous facts faced in biochemistry.
Urban Geography and the Production of Socio-Environmental Inequalities  [PDF]
Marc Parés
International Journal of Geosciences (IJG) , 2013, DOI: 10.4236/ijg.2013.46A2006

In this article we use the Urban Political Ecology approach to show that by analysing governance networks we can better understand the production of certain socio-environmental transformations that negatively affect some social groups while benefiting others. Drawing upon two case studies in the UK, the article explores the dialectical relationships between different modes of urban governance on one hand and the socio-environmental transformations fulfilled in each case study on the other hand. The article concludes that although urban regeneration policies are always constrained by the neoliberal established framework of power relations, policy outputs and outcomes could be very different from one place to another, shaping uneven socio-environmental constructions. Finally, we make some recommendations in order to stimulate the production of more sustainable communities in the future.

Xenotransplantation of embryonic pig pancreas for treatment of diabetes mellitus in non-human primates  [PDF]
Marc R. Hammerman
Journal of Biomedical Science and Engineering (JBiSE) , 2013, DOI: 10.4236/jbise.2013.65A002

Transplantation therapy for diabetes in humans is limited by the low availability of human donor whole pancreas or islets. Outcomes are complicated by immunosuppressive drug toxicity. Xenotransplantation is a strategy to overcome supply problems. Implantation of tissue obtained early during embryogenesis is a way to reduce transplant immunogenicity. Pig insulin is biologically active in humans. In that regard the pig is an appropriate xenogeneic organ donor. Insulin-producing cells originating from embryonic pig pancreas obtained very early following pancreatic primordium formation [embryonic day 28 (E28)] engraft long-term in rhesus macaques. Endocrine cells originating from embryonic pig pancreas transplanted in host mesentery migrate to mesenteric lymph nodes, engraft, differentiate and improve glucose tolerance in rhesus macaques without the need for immune suppression. Transplantation of embryonic pig pancreas is a novel approach towards beta cell replacement therapy that could be applicable to humans.

The Prospects for Renewable Energy through Hydrogen Energy Systems  [PDF]
Marc A. Rosen
Journal of Power and Energy Engineering (JPEE) , 2015, DOI: 10.4236/jpee.2015.34050

The prospects for renewable energy are enhanced through the use of hydrogen energy systems in which hydrogen is an energy carrier. As easily accessible fossil fuel supplies become scarcer and environmental concerns increase, hydrogen is likely to become an increasingly important chemical energy carrier. As the world’s energy sources become less fossil fuel-based, hydrogen and electricity are expected to be the two dominant energy carriers for the provision of end-use services, in a hydrogen economy. Thus, hydrogen energy systems allow greater use of renewable energy resources. In this paper, the role of hydrogen as an energy carrier and hydrogen energy systems, and their economics, are described and reviewed.

Net-Zero Energy Buildings and Communities: Potential and the Role of Energy Storage  [PDF]
Marc A. Rosen
Journal of Power and Energy Engineering (JPEE) , 2015, DOI: 10.4236/jpee.2015.34065

Net-zero energy buildings and communities, which are receiving increasing interest, and the role of energy storage in them, are described. A net-zero energy building or community is defined as one that, in an average year, produces as much energy from renewable energy as it consumes. Net-zero energy buildings and communities and the manner in which energy sustainability is facilitated by them are described and examples are given. Also, energy storage is discussed and the role and importance of energy storage as part of net-zero buildings and communities are explained. The NSERC Smart Net-zero Energy Buildings Research Network, a major Canadian research effort in smart net-zero energy buildings and communities, is described.

On the Role of Chloroplasts in the Polymerization of Tannins in Tracheophyta: A Monograph  [PDF]
Jean-Marc Brillouet
American Journal of Plant Sciences (AJPS) , 2015, DOI: 10.4236/ajps.2015.69140
Abstract: Proanthocyanidins are formed in the chlorophyllous organs of Tracheophyta from a redifferentiation of chloroplasts involving the thylakoidal membrane and lumen. With the purpose to help researchers of concerned disciplines to identify such chloroplasts, we described herein the morphologies of functional and redifferentiating chloroplasts in various members of Tracheophyta. The most obvious sign of redifferentiation is a tremendous swelling of the chloroplast which turns obese. De novo genesis of osmiophilic materials is also characteristic, either as single dots attached to the inner face of the swollen thylakoidal membrane which will yield the tannosomes, or as pearl necklace-shaped structures protruding into the lumen; this last formation can be viewed as a giant tannosome forming finally stromal chlorotannic accretions. Whatever their mode of formation is, tannosomes are expulsed from the chloroplast as shuttles.
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