Wednesday, February 18, 2009

cellular biology

The Biology Project Home > Cell Biology

Online Onion Root Tips: Phases of the cell cycle
In this digital version of the classic microscope lab, you will classify cells from the tip of an onion root into the appropriate phases of the cell cycle, and then count up the cells found in each phase. You can use those numbers to predict how much time a dividing cell spends in each phase

en español

Cell Membranes Learn that membranes are fluid, with components that move, change, and perform vital physiological roles as they allow cells to communicate with each other and their environment.


Cell Signaling
Learn that living organisms constantly receive and interpret signals from their environment. Cells of multi-cellular organisms also receive signals from other cells, including signals for cell division and differentiation.

Studying Cells Introduce yourself to the cell as the fundamental unit of life and the scientific method.

The Cell Cycle & Mitosis Understand the events that occur in the cell cycle and the process of mitosis that divides the duplicated genetic material creating two identical daughter cells.

Meiosis Understand the events that occur in process of meiosis that takes place to produce our gametes.

Prokaryotes, Eukaryotes, & Viruses Learn about the cells that make up all living systems, their organelles, and the differences between living cells and viruses.

The Cytoskeleton Learn that the cytoskeleton acts both a muscle and a skeleton, and is responsible for cell movement, cytokinesis, and the organization of the organelles within the cell.

CELLS Alive! is a highly visual site, where you will find movies and animated illustrations on cell processes, parasites, penicillin and more.

cell.de Online-Service for Cell Biology includes digital media in internet quality and further information for university and high school on cellular and molecular biology. The IWF - Institute for Scientific Film, Göttingen (Germany) prepares educational media about cellular and molecular biology didactically and technically for different media carriers.

C. elegans Movies A visual introduction to C. elegans and its development. This page has links to movies made by C. elegans researchers worldwide.

Biology Mad. This website is mainly aimed for students studying AQA (spec. A) Biology in the UK. It is informative, beautifully designed and easy to use.

http://www.actionbioscience.org is an education resource of the American Institute of Biological Sciences. The site provides peer-reviewed articles by scientists, science educators, and science students. In addition, the web site provides educators with original lessons and other resources to enhance bioscience teaching. Selected articles are translated into Spanish.

biochem4schools, is an online collection of biochemistry resources. With comprehensive reviews and extensive cross-referencing, this site will be an indispensable tool for teachers and students involved in biochemistry at all levels.

The Biology Project Home > Cell Biology


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The Biology Project Cell Biology

Wednesday, December 17, 2008

Whether defying the dean of the University of Pennsylvania School of Medicine so he could publish a book on world health or challenging the titans of cosmology, Robert Lanza has never followed the script. It’s no wonder, then, that this renegade doctor would lead the charge into medicine’s most controversial turf: the creation of cloned embryos for therapy and the engineering of spare human parts.

The value of therapeutic cloning has long been clear to Lanza, who did his early work with South African heart transplant pioneer Christiaan Barnard. Starting from those early days, Lanza understood that the barrier to tissue transfer was rejection by the recipient. From an entire organ to a dose of embryonic stem cells, if the tissue’s DNA came from anyone else, the transplant would be rejected without the aid of harsh immunosuppressive drugs. “The treatment could be worse than the problem,” Lanza found. But embryonic clones, the source of an endless supply of stem cells imprinted with one’s personal DNA, could alter the equation in favor of the patient and augur a paradigm shift in medicine on par with the changes brought about by antibiotics and vaccines.

Lanza’s single-minded quest to usher in this new age has paid dividends in scientific insights and groundbreaking discoveries. Today a world force in the field of regenerative medicine, he’s close to delivering cellular therapies that might reseed the immune system, heal damaged hearts, even save limbs. Yet for almost 20 years government policy has kept his innovations literally on ice. He has been called a murderer for tampering with embryos, and personal threats were so common at one point that he believed he would be killed.



Enduring tough times and fighting for his beliefs suit Lanza well. He grew up poor in the Rox­bury section of Boston and, later, suburban Stoughton, where he had a difficult relationship with his mother and was distanced from his professional gambler father. Year round, Lanza says, he was rarely allowed inside his own house except to eat dinner and sleep. With nowhere else to go, he spent his youth roaming the nearby wilderness immersed in nature’s mysteries.

Though initially labeled “slow” at school, in 1969 Lanza distinguished himself by transferring genes from black chickens to white ones when he was just 14, a mere three years after scientists cracked the genetic code. That extraordinary early feat, eventually published in Nature, signaled a raw scientific talent that his mentors (who came to include Jonas Salk and B. F. Skinner) likened to Einstein’s. In a 2001 article, U.S. News & World Report called Lanza the “living embodiment” of the fictional genius in the movie Good Will Hunting, whose Massachusetts accent is as thick as Lanza’s own.

Today Lanza lives on an island in a small Massachusetts lake, keeping a veritable museum of fossils and dinosaur bones and surrounded by the nature he cherishes. DISCOVER senior editor Pamela Weintraub interviewed Lanza at his Worcester office.

You have always bucked authority, haven’t you?
In the real world, people had a different plan for me, the boy from Roxbury with a family so rough and lacking in education. There would be fights. The police would be called.

The Stoughton public school system had three classes in elementary school: A, B, and C. I was put in the C class with the kids throwing spitballs at the teachers, the ones who had been held back.

How did you cope?
There was a golf course nearby, so I earned money by collecting and returning golf balls. When I had saved $18.95, I had enough to mail-order a little squirrel monkey, sitting in the palm of a woman’s hand, that was advertised in the back of Field & Stream. I sent in my money and forgot about it, but a year later I came home from school and there’s this monkey in the middle of the kitchen, tied up inside a box with these pellets in it. “Stay away; it will attack,” my mother said, but here was this little teeny baby squirrel monkey. It was sneezing; it had a cold. I went up to it and it just curled up. And it became my best friend. It was just like a little person—little fingerprints, everything. It was actually smarter than a lot of my friends.

Back then I was on my own. I went into ponds to get snapping turtles. I would go out for miles in the middle of the winter, using footprints to track raccoons. I fell through the ice on a pond 15 miles from civilization up to my waist when it was below zero. I would go up in trees and catch little screech owls in their holes. I’d go on long excursions trying to figure out how the universe worked. Even at that early age, I was in awe and wonder of the world.

Friday, September 26, 2008

real bionic woman

its really amazing wat they can do with computers now days. and after reading the article i think that they really gave the lady in the story a second chance at a normal life. i think that she will be the cause of other mechanical break throughs.