Biochemical Pathways - Cellular and Molecular Processes

Trang này có bản đồ các quá trình sinh hóa, nhấn vào mỗi ô nhỏ để xem các chi tiết. Ở một ô nhỏ có thể nhấn vào các mũi tên để nối thêm các ô lân cận:

http://www.expasy.ch/cgi-bin/show_thumbnails.pl?2

Molecular Biology Web Book

http://www.web-books.com/MoBio/

Trang web này có nhiều kiến thức tóm lược về sinh học phân tử.

Đoạn sau được lấy từ trang web trên, nhân trường hợp một bác trong Friendlist xuống tóc ăn chay vì sợ Cholesterol trong máu cao. :(

Có mấy cái Steroids liên quan đến độ lãng mạn chắc là các bạn cũng nhận ra :)

Cholesterol and Steroids

Cholesterol is absent from most prokaryotic cells, but abundant in the plasma membrane of mammalian cells. It is used as a precursor to generate other important steroids.

Cholesterol plays a central role in atherosclerosis - a disorder that may cause heart attack or stroke. It is also involved in Alzheimer's disease.

Figure 1-B-3. Structures of cholesterol and other important steroids. They are characterized by four hydrocarbon rings, designated as A, B, C, and D. Although cholesterol is made up of almost entirely hydrocarbons, it is still an amphipathic molecule (with both hydrophilic and hydrophobic parts) because it contains a hydroxyl group (OH).

Choose your battles wisely

Neil Smith

Animals, like plants, can respond in different ways to parasite infections: they can mount a full-scale immune response or they can tolerate the invader. Andrew Read and colleagues from the University of Edinburgh, UK, introduced rodent malaria into five strains of laboratory mice and monitored parasite load and animal health, as measured by anaemia and body mass. In some strains of mice, parasite load increased and the mice stayed healthy, which indicated that the mice could tolerate the parasite. In other mice strains, however, parasite load decreased, which indicated that the mice were resisting infection. The authors suggest that these findings could have important implications for pathogen evolution: pathogens might not be pushed to evolve increased virulence if they are tolerated rather than destroyed. However, tolerated pathogens are also more likely to spread.

In a somewhat related paper, Lynn Martin, from the University of South Florida, and colleagues report that fast-living strains of mice develop high fevers in response to simulated infection, but slow-living strains do not. The authors propose that the 'live fast, die young' mice tolerate the harm that fever inflicts on bodily tissues, as they already have short lifespans. Slow-living mice, however, have more to lose and may therefore adopt targeted strategies, such as antibody production. Science/Funct. Ecol.

Nature Reviews Microbiology 6, 9-10 (January 2008)

50 & 100 Years Ago

(nature.com)

50 Years Ago

What Man May Be: The Human Side of Science by George Russell Harrison — It has been estimated that each year sees the discovery of at least one million new scientific facts. Very few of us who are scientists have the capacity to digest more than a minute fraction of this feast, and to see the pattern to which it contributes. Yet we are vastly better off than the non-scientists, whose main contact with science is "through its slums, the half-world of such things as flying saucers and water dowsing"... This is an excellent book to give to almost anyone who wants to understand that science has changed both the things we do, and the way we think. There is not a dull moment in it, and probably most of those who do read it will catch something of the infectious optimism that underlies each page. Onward and upward in the best of all possible worlds.

From Nature 4 January 1958.

100 Years Ago

"The inheritance of 'acquired' characters" (Sur la Transmissibilité de Charactères acquis) by Eugene Rignano — A man of science to command general attention and interest must do two things; first, he must make interesting discoveries or profound generalisations; and secondly, he must do things at the right time. Darwin made his name because he fulfilled both conditions. Mendel died an unknown man because he did not fulfil the second. He was forty years too soon ... If it is possibly fatal to make discoveries too soon, it is certainly fatal to make them too late. It is therefore with a certain sense of weariness, mingled with surprise, that we note the appearance of a work on the transmission of acquired characters ... The author of the book before us, who is an engineer interested in sociology, believes in the transmission of acquirements, and has invented a theory of centro-epigenesis to account for the phenomenon.

From Nature 2 January 1908.

Entry for January 01, 2008

Chúc các cô bác, anh chị, các bạn... đón Năm Mới 2008 với nhiều niềm vui!

Đây là chùm ảnh tuyết rơi - công viên - Năm Mới do anh cu Heo chụp ạ :)

Mắm tôm chua

Đây là món được bà con nhà tớ lưu ý nhiều nhất trong bữa cơm cuối năm, món này cứ lâu lâu tớ lại làm một lọ, rất là đắt hàng. Bí quyết làm món này tớ có được là nhờ nàng Mèo Béo, cảm ơn Mèo rất nhiều!

Các bạn xa nhà có thể thực hành rất dễ dàng. Sau đây là công thức do Mèo Béo cung cấp:

Mắm tôm chua, không ngon không lấy xiền

Mua tôm không đầu loại nhỡ nhỡ thui ạ
Ngâm tôm với beer, để beer xâm xấp....Ngâm lâu đấy ạ, phải từ sáng đến chiều nhé, ít nhất cũng phải 4-5h. Sau đó đổ tôm ra để cho ráo

Sau đó làm nước thì cứ 1cup đường - 1 cup nước mắm - 1 cup beer

Tỏi và giềng thái mỏng hoặc chỉ sau đó cho vào với tôm, tùy người thích ăn nhiều nước hay ít. Rồi cho thính vào, đừng cho nhiều quá sẽ bị đắng đấy ạ

Để khoảng va`i ngày ở ngoài, khi nào ăn được thì lại rinh vào tủ lạnh....

Mèo Béo