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Search Results: 1 - 10 of 593 matches for " Eleni Buzea "
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Present a Mechatronic System Having Able to Determine the Concentration of Carotenoids
Raffaella Aversa, Eleni Buzea, Relly Victoria V. Petrescu, Antonio Apicella, Marin Neacè?a and Florian Ion T. Petrescu
American Journal of Engineering and Applied Sciences , 2016, DOI: 10.3844/ajeassp.2016.1106.1111
Abstract: Civilization besides its major advantages (undisputed) brought us some unhealthy habits which unfortunately have managed to penetrate deeply within several generations on the current planetary populations producing great damages to its health. Perhaps it would be the right time to and more people learning to live healthy, to feed ourselves healthy, let's try to break the chain of evil which we grind all already several generations. It has been shown that residual free radicals in the body are responsible for aging. The role to annihilate them is fulfilled by the antioxidants. Antioxidants are a group of compounds produced by the organism or that occur naturally in many foods. Antioxidants work together in the human body to maintain health and vigor, especially during the last decades of life. Antioxidants network offers the advantage of avoiding premature death caused by these deficiencies and sometimes even cure those diseases. The methods generally used for the determination of carotenoids extracted from a natural environment are based on absorption spectrophotometry. These methods may be relatively precise but require a relatively long preparation of the sample to be analyzed. Indeed, because of the other pigments often present in the samples analyzed and extracted at the same time as the carotenoids, the analysis is not very precise on the crude acetone extract, chlorophylls in particular are often troublesome. Saponification and different extraction methods are then necessary to purify the solution, which inevitably leads to loss of carotenoids, thus an error in the assay.
Debut de la Protection Penale du Droit De Vie
Monica Buzea
EIRP Proceedings , 2009,
Abstract: The right to life, as a biological feature of the human being, stands for the supreme,absolute, erga omnes opposable value, whose absence would invalidate all the other rights andtheir exertion in the society. The hereby article analyzes the European Regulations, as well asthose of the Romanian Criminal Law regarding the moment the right to life’s penal protectionbegins. There are also comparative examinations of the modification proposals regarding theCriminal Law, adopted by the Government of Romania on February 25th 2009 and brought to theattention of the Romanian Parliament, especially those regarding the definition of the moment lifebeings, the incriminating conditions of the abortion and the manners of institutionalizing theinfanticide offence, a recently introduced offence type concerning the harm done to the infant.Upon examining the aforementioned aspects, it can be concluded that with regard to theprotection of the right to life, from the perspective of determining its beginnings, the legislationsare far from being unanimous. Furthermore, the ethical, moral and religious elements of variousstates will reflect into the legal matters surrounding the offences sanctioning the breaking of thesesocial relations, thus continuing to generate numerous debates on doctrinaire and legislativeaspects.
Occupational prestige in Romania - An Exploratory Study
Buzea, C.,Scarneci, F.
Bulletin of the Transilvania University of Bra?ov. Series VII : Social Sciences and Law , 2011,
Abstract: The work at hand presents the results of an exploratory study whose aim was the supply of necessary background in the creation of a national occupational prestige measurement scheme. There are presented methodological approaches in the selection of the occupation list and the criteria considered by the responders in the ranking process. It has been recorded that success is defined as an accomplishment of family life and the existence of material comfort, success being mainly assigned to internal factors (ambition, perseverance, hard work and education). Management positions and those in the IT field are ranked as being the most needed, whilst occupations in politics and management are considered to be the best remunerated.
Assembling the puzzle of superconducting elements: A Review
Cristina Buzea,Kevin Robbie
Physics , 2004, DOI: 10.1088/0953-2048/18/1/R01
Abstract: Superconductivity in the simple elements is of both technological relevance and fundamental scientific interest in the investigation of superconductivity phenomena. Recent advances in the instrumentation of physics under pressure have enabled the observation of superconductivity in many elements not previously known to superconduct, and at steadily increasing temperatures. This article offers a review of the state of the art in the superconductivity of elements, highlighting underlying correlations and general trends.
Review of superconducting properties of MgB2
Cristina Buzea,Tsutomu Yamashita
Physics , 2001,
Abstract: This review paper illustrates the main normal and superconducting state properties of magnesium diboride, a material known since early 1950's, but recently discovered to be superconductive at a remarkably high critical temperature Tc=40K for a binary compound. What makes MgB2 so special? Its high Tc, simple crystal structure, large coherence lengths, high critical current densities and fields, transparency of grain boundaries to current promises that MgB2 will be a good material for both large scale applications and electronic devices. During the last seven month, MgB2 has been fabricated in various forms, bulk, single crystals, thin films, tapes and wires. The largest critical current densities >10MA/cm2 and critical fields 40T are achieved for thin films. The anisotropy ratio inferred from upper critical field measurements is still to be resolved, a wide range of values being reported, between 1.2 and 9. Also there is no consensus about the existence of a single anisotropic or double energy gap. One central issue is whether or not MgB2 represents a new class of superconductors, being the tip of an iceberg who awaits to be discovered. Up to date MgB2 holds the record of the highest Tc in its class. However, the discovery of superconductivity in MgB2 revived the interest in non-oxides and initiated a search for superconductivity in related materials, several compounds being already announced to become superconductive: TaB2, BeB2.75, C-S composites, and the elemental B under pressure.
Nano-sculptured thin film thickness variation with incidence angle
Cristina Buzea,Kevin Robbie
Physics , 2004,
Abstract: In-situ monitoring and calibration of nano-sculptured thin film thickness is a critical problem due to substrate tilt angle dependent porosity and mass flux. In this letter we present an analytical model for thickness dependence on fabrication parameters for nano-sculptured films. The generality of the model includes universal Gaussian-type flux distribution, non-unity sticking coefficients, variable off-axis sensor location, and substrate tilt. The resulting equation fits well the experimental data. The results can be particularized for films deposited at normal incidence
Effect of Storage Conditions on the Sensory Quality, Colour and Texture of Fresh-Cut Minimally Processed Cabbage with the Addition of Ascorbic Acid, Citric Acid and Calcium Chloride  [PDF]
Eleni Manolopoulou, Theodoros Varzakas
Food and Nutrition Sciences (FNS) , 2011, DOI: 10.4236/fns.2011.29130
Abstract: The aim of this study was to investigate the effect of storage conditions on the sensory quality, colour and texture of fresh-cut cabbage during the addition of ascorbic acid, citric acid and calcium chloride. Ascorbic acid maintained the overall quality for 14 days at 0℃ and 7 days at 5℃; no difference, however, was observed regarding browning of cut surface compared to the control sample at both storage temperatures. Calcium chloride maintained the overall quality and cut surface browning for 14 days at both storage temperatures. It was also found that citric acid 1% can be used for minimally processed cabbage. Soaking with citric acid helped retain the color and increased the overall acceptance and organoleptic quality of fresh cut cabbage; it reduced browning of the cut surface and protected against formation of black specks. Citric acid treatment combined with low temperature storage (0℃) prolonged the shelf life of minimally processed cabbage for 22 days, time sufficient for acceptable marketing of the product. The lightness of minimally processed cabbage decreased linearly from 70.94 ± 6 to 63.8 ± 8.5 - 61.3 ± 8 units for the chemical treatments during 22 days of storage at 0℃. Hue angle values during storage time were also significantly influenced by chemical treatments mainly at 0℃.
School Effects on Adolescent Substance Use: Prevention through Interactive and Social Learning Strategies  [PDF]
Eleni Stefanidi, George Tsitsas
Creative Education (CE) , 2015, DOI: 10.4236/ce.2015.65050
Abstract: This study aimed to examine: a) the factors in Greek schools that are related to the school course of the adolescent drug abusers; b) the effectiveness of new interactive and social learning strategies in preventing drug use. Data were drawn from a face-to-face survey carried out on population of ex-drug abusers that were attending therapeutic programs of STROFI-KETHEA and in other places such as private with psychiatrists. The sample was 22 boys and 8 girls aged 16 to 21 years. All participants had a drug use experience and high rates of school drop out. The results suggest that factors related to the Greek school environment-meaning its culture, sense of community, education strategies–have negatively affected the school course of the participants. The poor school connectedness and dropping out effect negatively on young people’s behavior and drug use problems. Prevention should be considered through a new approach of the education system.
Nanomaterials and nanoparticles: Sources and toxicity
Cristina Buzea,Ivan I. Pacheco,Kevin Robbie
Physics , 2008,
Abstract: This review is written with the goal of informing public health concerns related to nanoscience, while raising awareness of nanomaterials toxicity among scientists and manufacturers handling them. We show that humans have always been exposed to nanoparticles and dust from natural sources and human activities, the recent development of industry and combustion-based engine transportation profoundly increasing anthropogenic nanoparticulate pollution. The key to understanding the toxicity of nanoparticles is that their minute size, smaller than cells and cellular organelles, allows them to penetrate these basic biological structures, disrupting their normal function. Among diseases associated with nanoparticles are asthma, bronchitis, lung cancer, neurodegenerative diseases (such as Parkinson`s and Alzheimer`s diseases), Crohn`s disease, colon cancer. Nanoparticles that enter the circulatory system are related to occurrence of arteriosclerosis, and blood clots, arrhythmia, heart diseases, and ultimately cardiac death. We show that possible adverse effects of nanoparticles on human health depend on individual factors such as genetics and existing disease, as well as exposure, and nanoparticle chemistry, size, shape, and agglomeration state. The faster we will understand their causes and mechanisms, the more likely we are to find cures for diseases associated with nanoparticle exposure. We foresee a future with better-informed, and hopefully more cautious manipulation of engineered nanomaterials, as well as the development of laws and policies for safely managing all aspects of nanomaterial manufacturing, industrial and commercial use, and recycling.
On Gravitational Shielding in Electromagnetic Fields
M. Agop,C. Gh. Buzea,B. Ciobanu
Physics , 1999,
Abstract: We show the presence of an electromagnetic field can cause a gravitational Meissner effect and, as a result, a gravitational shielding. With this aim in view we must first unveil the following problems : generalized Maxwell equations, generalized London equations, generalized Meissner effect, generalized shielding, etc.
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