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SHOOT GROWTH1 Maintains Arabidopsis Epigenomes by Regulating IBM1
Vincent Coustham, Daniela Vlad, Aurélie Deremetz, Isabelle Gy, Francisco A. Cubillos, Envel Kerdaffrec, Olivier Loudet, Nicolas Bouché
PLOS ONE , 2014, DOI: 10.1371/journal.pone.0084687
Abstract: Maintaining correct DNA and histone methylation patterns is essential for the development of all eukaryotes. In Arabidopsis, we identified SHOOT GROWTH1 (SG1), a novel protein involved in the control of gene methylation. SG1 contains both a Bromo-Adjacent Homology (BAH) domain found in several chromatin regulators and an RNA-Recognition Motif (RRM). The sg1 mutations are associated with drastic pleiotropic phenotypes. The mutants degenerate after few generations and are similar to mutants of the histone demethylase INCREASE IN BONSAI METHYLATION1 (IBM1). A methylome analysis of sg1 mutants revealed a large number of gene bodies hypermethylated in the cytosine CHG context, associated with an increase in di-methylation of lysine 9 on histone H3 tail (H3K9me2), an epigenetic mark normally found in silenced transposons. The sg1 phenotype is suppressed by mutations in genes encoding the DNA methyltransferase CHROMOMETHYLASE3 (CMT3) or the histone methyltransferase KRYPTONITE (KYP), indicating that SG1 functions antagonistically to CMT3 or KYP. We further show that the IBM1 transcript is not correctly processed in sg1, and that the functional IBM1 transcript complements sg1. Altogether, our results suggest a function for SG1 in the maintenance of genome integrity by regulating IBM1.
Asymptotic Expansion of Temperature Close to a Singularity of a Plate  [PDF]
Isabelle Titeux
World Journal of Mechanics (WJM) , 2011, DOI: 10.4236/wjm.2011.13015
Abstract: The thermal conduction in a thin laminated plate is considered here. The lateral surface of the plate is not regular. Consequently, the boundary of the middle plane admits a geometrical singularity. Close to the origin, the lateral edge forms an angle. We shall prove that the classical bidimensional problem associated with the thin plate problem is not valid. In this paper, using the boundary layer theory, we describe the local behavior of the plate, close to the perturbation.
Peri-Orbital Non-Invasive and Painless Skin Tightening-Safe and Highly Effective Use of Multisource Radio-Frequency Treatment Platform  [PDF]
Isabelle Rousseaux
Journal of Cosmetics, Dermatological Sciences and Applications (JCDSA) , 2015, DOI: 10.4236/jcdsa.2015.53025
Abstract: The periorbital area is the third highest-ranking area for cosmetic surgery. However, surgery in this area presents a number of difficulties and safety concerns. First generation Monopolar RF treatments in this area were usually associated with considerable pain and long downtime. In the present clinical study, we used the iFine handpiece of the EndyMed PRO, multi-source phase-controlled radiofrequency (RF) for Non-invasive, pain free, skin rejuvenation of the periorbital area. The study included eleven (11) subjects, treated for periorbital signs of aging (iFine handpiece, EndyMed PRO platform, EndyMed Medical, Caesarea, Israel). The degree of clinical improvement was assessed by the global aesthetic improvement scale (GAIS) and subjects satisfaction by post treatment questionnaires. 91% of patients showed good to excellent improvement as a result of the treatment. Subjects satisfaction showed that 55% of patients reported that they were very satisfied, 45% were satisfied while none were dissatisfied. There were no incidences of infections, scarring, hypopigmentation, or any other serious complications.
Development of a mechanised plantain slicer
GY Obeng
Journal of Science and Technology (Ghana) , 2004,
Abstract: Cutting of bulk plantains into chips for local and foreign markets is a processing method, which reduces post-harvest losses of green or ripening plantain. The traditional method of slicing plantain with a kitchen knife is laborious, time-consuming and prone to injury, and can only be practiced on a very small scale of production. The mechanised slicer seeks to reduce the drudgery associated with traditional cutting of large-scale plantains into chips. The machine takes 5-7 seconds to slice a finger of an average-size plantain into chips of 2-3mm in thickness compared to the 40-80 seconds with a kitchen knife, which gives non-uniform thickness of plantain chips. It was found to be very convenient, and the average thickness of plantain chips produced with the slicer compares favourably with commercial standards. Journal of Science and Technology Vol.24(2) 2004: 126-133
Mural Painting Retouching Challenges; A Ghanaian Professional Painter’s Experience
GY Annum
Journal of Science and Technology (Ghana) , 2012,
Abstract: of importance must enjoy a prolonged lifetime of aesthetic and functional benefit to society. Unfortunately, the life span of outdoor murals displayed on public buildings in Ghana have been shortened by the ravages of weather, public interaction with them as well as deterioration over years of neglect. Many of such works especially those embedded in the walls of buildings come under severe defacement in the hands of building contractors who either smear them with wall paints or rip them off completely as irrelevant things when such edifices come under extensive renovation. Those that survive the test of time sadly end up with cracks. There seem to be the general lack of professional conservators with the right acumen for addressing the conservation needs of the country. This paper therefore throws a searchlight on preservation and retouching challenges and employs the descriptive method to discuss the researcher’s experience in retouching five mural paintings at the Great Hall of KNUST, which had deteriorated and lost their aesthetic values over years of neglect.
Energy services fro the rural poor: A comparative analysis of solar services centres and multifunctional platforms and lessons for Ghana
GY Obeng
Journal of Science and Technology (Ghana) , 2006,
Abstract: Solar service centres and multifunctional platforms are innovative concepts for providing energy services in poor rural communities. For some communities, because of the size and dispersion of their location, grid-electricity is non-existent and therefore a solar service centre or a multifunctional platform is the only viable option for lighting, refrigeration, water pumping, powering of equipment etc. Though they contribute to socio-economic development of rural communities, it is however argued that the two energy services provide different frontiers of contribution to energy security. This paper therefore compares these energy services and shows how they have contributed to reduce energy-poverty in rural Ghana and Burkina Faso. The scope of the analysis covers deep-seated empirical lessons on investment costs, benefits and welfare gains, and potential in direct productive and spin-off energy demand sectors. The purpose is to draw lessons to inform rural people, energy policy makers, and development experts on both good practices and failures of the two forms of energy services. Evidence from the surveys confirms that, solar service centres and multifunctional platforms are fundamentally suitable for use in poor rural communities. However, the concern is what to go in for when faced with the problem of choice, which is critical in meeting the needs of the rural poor.
Pharmaceuticals prepared by continuous polymer technologies
Gy. Marosi
eXPRESS Polymer Letters , 2012, DOI: 10.3144/expresspolymlett.2012.37
Abstract: editorial
Powder injection molding: Borderlines and interfaces
Gy. Banhegyi
eXPRESS Polymer Letters , 2012, DOI: 10.3144/expresspolymlett.2012.64
Abstract: editorial
Mathematical Equivalency of the Ether Based Gavitation Theory of Janossy and General Relativity
Gy. Szondy
Physics , 2003,
Abstract: "There are several interpretations and approaches to relativity. All of them are characterized by the fact that none of them is accepted by physicists without doubts, even the Einsteinian General Relativity! Only those theories can get into the spotlight that predicts something that is different from predictions of other concurrent theories. From this point of view the theory of Janossy [1] is not an excellent idea, as he tried to show that his materialistic approach also corresponds to the general principles and equations of relativity. As his program was basically successful there was not any additional result, except the philosophical part." Since the death of Janossy, his work has almost been forgotten. Both what he achieved and what he was not succeeded in. He was one of the founders of KFKI (Central Physics Research Institute of the Hungarian Scientific Academy) but his effort has not been carried over even there, however his collegues are still remember his name and his work. Luckily his books are still available in the Hungarian libraries. Additionally the most informed etherists in the world who are lucky enough to know his work are consider his work as a No1 reference. This paper is designated to refresh the idea of the ether based gravitation theory of Janossy and introduce a well founded way to adjust it to be equivalent with the experiences and General Relativity.
Linear Relativity as a Result of Unit Transformation
Gy. Szondy
Physics , 2001,
Abstract: General Relativity is considered to be so far the best gravitation theory. However it is quite hard to use in real situations. The root of these difficulties lays in the non-linearity of the theory. Our aim was not to linearize the theory, but find the source of non-linearity and get rid of it. We found that the resolution can be obtained by defining standards and units properly. We also found that the mathematical method to change the units of General Relativity has been discussed in general almost 40 years ago by Dicke. Linear Relativity can be founded by choosing the right function for his transformation and reinterpret his results.
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