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ΟΟΣΑ: Εκπαιδευτική έρευνα PISA H Κύπρος θα συμμετάσχει στην έρευνα PISA 2012. Το συντονισμό και τη διεξαγωγή της έρευνας έχει αναλάβει το ΚΕΕΑ. Η PISA είναι μία διεθνής έρευνα που διεξάγεται από τον OECD (Organisation for Economic Cooperation and Development – Οργανισμός Οικονομικής Συνεργασίας και Ανάπτυξης) με σκοπό τη διεθνή αξιολόγηση των εκπαιδευτικών συστη­μάτων των χωρών που συμμετέχουν σε αυτόν. Συγκεκριμένα, η έρευνα στοχεύει στον καθορισμό αξιόπιστων δεικτών σε θέματα που σχετίζονται με τα μαθησιακά αποτελέσματα των εκπαιδευτικών συστημάτων (γνώσεις και δεξιότητες στους τομείς της Ανάγνωσης, των Μαθηματικών και των Φυσικών Επιστημών) κατά την περίοδο στην οποία η υποχρεωτική εκπαίδευση βαίνει ή βρίσκεται προς την ολοκλήρωσή της (στις περισσότερες χώρες). Η έρευνα διεξάγεται από το 2000 κάθε 3 χρόνια. Μετά από επίμονες προσπάθειες η Κύπρος θα μπορέσει να συμμετάσχει στην έρευνα PISA 2012. Η Πιλοτική Φάση (Field Trial) της έρευνας στην Κύπρο θα πραγματοποιηθεί το Μάρτιο και Απρίλιο του 2011. Κώστας Συμεωνίδης

Epigenetics Epigenetics PBS air date: July 24, 2007 CHEERFUL NEIL DEGRASSE TYSON: Did you ever notice that if you get to know two identical twins, they might look alike, but they're always subtly different? CANTANKEROUS NEIL DEGRASSE TYSON: Yep, whatever. CHEERFUL NEIL DEGRASSE TYSON: As they get older, those differences can get more pronounced. CANTANKEROUS NEIL DEGRASSE TYSON: No. CHEERFUL NEIL DEGRASSE TYSON: Yeah. CANTANKEROUS NEIL DEGRASSE TYSON: And don't our genes make us who we are? CHEERFUL NEIL DEGRASSE TYSON: Well they do, yes, but they're not the whole story. CANTANKEROUS NEIL DEGRASSE TYSON: Yeah, you're heavier, and I'm better looking. CHEERFUL NEIL DEGRASSE TYSON: Yeah, whatever. NEIL DEGRASSE TYSON: Imagine coming into the world with a person so like yourself, that for a time you don't understand mirrors. CONCEPCIÓN: As a child, when I looked in the mirror I'd say, "That's my sister." CLOTILDE: When I see my sister, I see myself. CLOTILDE: I have been told that I am a high risk for cancer.

vamnies on Vodpod - Videos about Or join with email Or Join with Email By joining, you agree to our Terms of Use and Privacy Policy. Or Sign in with email Forgot your password? Forgot your password Enter your email address and we'll send you an email with a link to reset your password. Sign in vamnies (vodpod) Top Collection vamnies's videos The Ductile Helix: "Jumping Genes" May Influence Brain Activity Mobile DNA molecules that jump from one location in the genome to another may contribute to neurological diseases and could have subtle influences on normal brain function and behavior, according to a study published October 30 in Nature. (Scientific American is part of Nature Publishing Group.) Retrotransposons are mobile genetic elements that use a copy-and-paste mechanism to insert extra copies of themselves throughout the genome. First discovered in plants about 60 years ago, they are now known to make up more than 40 percent of the entire human genome and may play an important role in genome evolution (pdf). Researchers from the Roslin Institute in Edinburgh, Scotland, have now comprehensively mapped retrotransposon insertion sites in the genomes of normal human brain cells for the first time. Their analyses identified more than 7,700 insertion sites for L1, the best-characterized retrotransposon family that was already known to be active in brain cells.

The PCR Method - a DNA Copying Machine Lists of Nobel Prizes and Laureates The PCR Method - a DNA Copying Machine Play the Eye of the Donkey Game About the game PCR is a method by which a few fragments of DNA can be duplicated into millions in a couple of hours. The Nobel Prize The 1993 Nobel Prize in Chemistry was awarded for the invention of PCR, a method that made it possible to copy a large numbers of DNA fragments in only a few hours. Share this: Share on facebook Share on google_plusone_share Share on twitter More Sharing Services Share on email To cite this pageMLA style: "The PCR Method - a DNA Copying Machine". Recommended: The Legacy of Alfred Nobel On 27 November 1895 Alfred Nobel signed his last will in Paris. Play the Blood Typing Game Try to save some patients and learn about human blood types! Unlocking the Secrets of Our Cells Discover the 2012 awarded research on stem cells and cell signalling. Contact E-mail us Press Sitemap A-Z Index Frequently Asked Questions Terms Follow Contact | Press | Sitemap | FAQ | Terms Follow us:

The Illustrated Guide to Epigenetics Illustrations by Joe Kloc This month marks the ten-year anniversary of the sequencing of the human genome, that noble achievement underpinning the less noble sales of 23andMe's direct-to-consumer genetic tests. To commemorate the scientific occasion, we've created an illustrated introduction to one subfield of genetics likely to produce even more dubious novelty science projects someday: epigenetics. What is epigenetics? FIGURE 1: Through a process called mitosis, a single cell (A) splits into two cells (B) with identical genetic information. FIGURE 2: DNA coils around proteins called histones, forming a nucleosome. How does the epigenome work? Molecular "caps" called methyl groups can be attached to genes in order to effectively block them from giving instructions to the cell (FIGURE 3). FIGURE 3: Methyl groups attach themselves to base pairs of a gene, changing the way the gene is expressed.In these two ways the epigenome controls which genes ultimately get expressed.

Nuclear reactor and power plant simulation Introduction This is not a lesson like the others in Radioactivity and Atomic Physics Explained but it fits in well with the lesson on nuclear power. It is a very sophisticated simulation of a pressurised water reactor (PWR), which is the most common type of nuclear power reactor in the US but not in Europe, though the principles are very similar. Using the tour There is a comprehensive tour which goes through the workings of the reactor, starting from a consumer of electrical energy and working backwards to the reactor core itself. You can restart the tour at any time using the button at the top left of the screen. Hint numbers Each part of the simulation has a hint number that you can click to see a description of its function. The skill test Once you're familiar with how to use the reactor you can see whether you can control the reactor so that the power output matches the demand from the city. Back to Summary of Radioactivity and Atomic Physics Explained

Acquired traits can be inherited via small RNAs Columbia University Medical Center (CUMC) researchers have found the first direct evidence that an acquired trait can be inherited without any DNA involvement. The findings suggest that Lamarck, whose theory of evolution was eclipsed by Darwin's, may not have been entirely wrong. The study is slated to appear in the Dec. 9 issue of Cell. "In our study, roundworms that developed resistance to a virus were able to pass along that immunity to their progeny for many consecutive generations," reported lead author Oded Rechavi, PhD, associate research scientist in biochemistry and molecular biophysics at CUMC. "The immunity was transferred in the form of small viral-silencing agents called viRNAs, working independently of the organism's genome." In an early theory of evolution, Jean Baptiste Larmarck (1744-1829) proposed that species evolve when individuals adapt to their environment and transmit those acquired traits to their offspring. Dr.

Αθανασόπουλος - Νέες Τεχνολογίες Γιατί υπάρχει αυτός ο ιστότοπος Αρχικά, όταν ξεκίνησα τα μαθήματα στο ΜΔΕ, βρήκα βολικό να ανεβάσω στο Διαδίκτυο τις παρουσιάσεις που θα χρησιμοποιούσα, για την περίπτωση που ξεχάσω σπίτι το USB stick ή αυτό κρίνει πως είναι ευκαιρία να μου αποδείξει πόσο αναντικατάστατο είναι... Το να ανεβάσω τα έτοιμα βοηθήματα και τις παρουσιάσεις ώστε να είναι στη διάθεση των φοιτητών και τις ώρες που αυτοί δεν είναι στο Πανεπιστήμιο, ήταν το επόμενο λογικό βήμα. Τέλος το site αυτό καθ' εαυτό αποτελεί μαι απλή εφαρμογή σύγρονων τεχνολογιών σχεδιασμού ιστοσελίδων, όντας βασισμένο σε HTML5 και CSS3. Τα βοηθήματα Πρόκειται για πληροφορίες που υποστηρίζουν ή επεκτείνουν (για τους διαβαστερούς) αυτά που περιλαμβάνονται στα εργαστήρια και τις διαλέξεις. Το αναρτημένο ή συνδεδεμένο υλικό είναι στην πλειονότητα ελεύθερο για χρήση ή διανομή, με την παράκληση να μνημονεύεται ο δημιουργός του, είτε είμαι εγώ, είτε κάποιος στον οποίο αναφέρομαι.

Genetics Practice Problems Genetics Practice Problems You may type in your own answers, then check to see if you were right. If you’re totally stumped, you can tell the computer to show you the answer to a particular question. Monohybrid Cross: In humans, brown eyes (B) are dominant over blue (b)*. (* Actually, the situation is complicated by the fact that there is more than one gene involved in eye color, but for this example, we’ll consider only this one gene.) Testcross: In dogs, there is an hereditary deafness caused by a recessive gene, “d.” Incomplete Dominance: Note: at least one textbook I’ve seen also uses this as an example of pleiotropy (one gene – multiple effects), though to my mind, the malaria part of this is not a direct “effect” of the gene. In humans, there is a gene that controls formation of hemoglobin, the protein in the red blood cells which carries oxygen to the body tissue. A photo, taken by Dr. Dihybrid Cross: If the man is both Rr and Tt (How do we know that?) Multiple Alleles and Codominance:

VAMNIES DIMITRIOS DNA Extraction from Wheat Germ DNA Extraction from Wheat Germ Objective · To observe the physical and chemical properties of DNA · Understand one process of DNA extraction · Demonstrate proficiency with one technique of DNA extraction · Use research to make a drawing of DNA with labeled parts · Use observations skill to make a drawing of the extracted DNA · Use research to answer DNA questions on activity handout Directions Important: Do research on methods of DNA extraction before coming to class on the day of this lab. Procedure Materials Activity Handout 1. 2. 3. 4. 5. 6. You can usually get more DNA to precipitate from the solution by using one of the DNA-collecting tools (such as a glass or paper clip hook) to gently lift the water solution up into the alcohol. 7. If you want to keep the DNA, store it in 50 - 70% alcohol in a sealed tube or air-dry it on paper towels or filter paper.

Dennis Kunkel Microscopy - Electron Microscopy Science Stock Photography