Friday, 30 July 2010

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Nanotechnology In Cosmetics Products Although you may not know the brand of cosmetics that you use for your face care contains ingredients with dimensions of nanoparticles (nanoingredients) able to penetrate your skin easily. What is nanotechnology? Nanotechnology is a field of applied science devoted to the control and manipulation of matter at a scale smaller than a micrometer ie the level of atoms and molecules (nano). Currently working on a range of one to one hundred nanometers (100-100 nm). Question of Size To get an idea of magnitudes we are talking about then are defined length units and establishing the relationships between them. The meter is the unit length of the International Unit System. It is called: m. The millimeter is a unit of length equal to one thousandth of a meter. It is called mm. The micrometer is a unit of length equal to one millionth of a meter. It is called m and is also known as Micron (plural Latin micron). NM is the unit of length equal to one billionth of a meter. It is called nm. 1 nm = 1 x 10-9 m = 1 x 10-6 mm = 1 x 10-3 m 1 micron = 1,000 mm = 1,000,000 nm 1 nm 1 m = 1 billion m Although cell size is relation to its function, most eukaryotic cell has a diameter between 10 and 100 im (exceptions). Usually the size is constant for each cell type, independent of body size, ie, a kidney cell of a horse is the same order as that of a mouse. The difference in body size is due to the number of cells and not the size of them. Why Cosmetic manufacturers use ingredients with dimensions of nanoparticles in their products? Precisely because of its ingredients with small dimensions of nanoparticles can penetrate...
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A New Approach To Technology Education A NEW APPROACH TO TECHNOLOGY EDUCATION IN MEXICO. SUBJECT: SCIENCE AND TECHNOLOGY AND SOCIETY PARTICIPANTS: Guadalupe Herrera Milagros Fonseca Reyes Olga Stein are many conflicts and events that led to the implementation of neoliberal programs in Latin America. This new approach to education, also brings a different way of dealing with content and support that are used to achieve the expected learning. Here we can mention the Information and Communication Technologies that are fashionable as it is motivating to the learners. To place ourselves in our context, education in Mexico for some time has tried to reach for most scientific and technological advances, we can mention the beginning of this program when the pilot schools were equipped with the first phase of Enciclomedia, which is a computational tool designed to stimulate the process of teaching and learning of primary school teachers regarding the curriculum contained in the books free text of the Ministry of Basic Education in Mexico. The system supports various kinds of resources to support the teacher teach when resources to support different learning styles. Time after seeing the positive results obtained with the use of this tool was improved and is the program that is in most schools. But simultaneously with the State administration, created another program that used the technology and that competed directly with Encyclopedia, this program was the Media Classroom, which is an open space to the school community, which aims to strengthen the teaching-learning process, by incorporating the technological tool and information through the same can be obtained. The media classroom consists of computer equipment connected to the Internet, television equipment and satellite station, which receives the signal EDUSAT, CD's and videos diverse educational and printed material related to the use of technology in the classroom. Unfortunately the political conflict of having a...