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Tuesday, April 29, 2008,

Bio rep here to bring you an interesting article to enrich you!! (I have some time to kill now...)


WEIRD LIFE: Plasma Crystal


Helix-shaped plasma crystals, which may be a form of so-called
"weird life," could potentially be found in the rings of Saturn.


If you take cosmic dust and add plasma ... do you get life? Findings suggest that plasma crystals may be the key to one of the universe's greatest mysteries: Is there life out there?

[continue reading]
(Warning: It's quite wordy... but if you have time to kill...)



Source: Howstuffworks.com

The universe is filled with massive clouds of dust. From past studies, scientists have learned that this cosmic dust can, in the presence of plasma, creates formations known as plasma crystals. An international team of researchers published a study in the Aug.14, 2007, issue of the New Journal of Physics that indicates that these crystals may be more sophisticated than anyone realized. In simulations involving cosmic dust, the researchers witnessed the formation of plasma crystals displaying some of the elementary characteristics of life -- DNA-like structure, autonomous behavior, reproduction and evolution.

Before we get into how it works, let's talk about plasma. Plasma is the fourth state of matter. When gas is superheated, electrons are torn from atoms and become free floating. The gas then becomes ionized, carrying a positive charge. This superheated mix of ionized gas and free-floating electrons makes up plasma. Stars are mostly plasma, as is about 99 percent of the matter of the universe, though plasma is much less common on Earth, where we're used to dealing with solids, liquids and gases. Besides being found in stars and in our sun, plasma is transported by solar winds and magnetic fields, often coming into contact with dust clouds like those the researchers studied.

When plasma comes into contact with a dust cloud, dust particles gather an electric charge by sucking up electrons from the surrounding plasma. This core of electrons in turn pulls in positively charged ions, forming plasma crystals. In the scientists' simulations, which were performed on the International Space Station and in a zero-gravity environment at a German research facility, the plasma crystals sometimes developed into corkscrew shapes or even the double-helix shape of DNA. These helix-shaped crystals retain an electric charge and show what the researchers called a self-organizing ability.


In simulations, plasma crystals sometimes assume the double-helix shape of DNA.


Once in helix form, the crystals can reproduce by diving into two identical helixes, displaying "memory marks" on their structures [source: New Journal of Physics]. The diameter of the helixes varies throughout the structure and the arrangement of these various sections is replicated in other crystals, passing on what could be called a form of genetic code.

They even seem to evolve. The formations become sturdier over time as weaker structures break down and disappear.

The researchers want to test whether dust clouds in a non-simulated environment, such as those in Saturn's rings, form helixes and exhibit these behaviors. But the plasma crystals are fragile and difficult to test. They also require a consistent flow of plasma or else they "die."

If they exist in the simulated form, the researchers believe that the crystal organisms could be found in the rings of Uranus and Saturn, which are made up of small grains of ice.

So they form DNA-like shapes, reproduce, pass on their structure or genetic code, "eat" plasma, evolve and die.

In July 2007, a group of American scientists, in association with the National Research Council, issued a report recommending that scientists search for so-called weird life on other worlds, in space and even on Earth. Weird life is believed to be far different from life forms we're used to seeing. Weird life may be organisms that don't depend on water or that don't have DNA at all. Some people even believe that weird life existed on Earth in the ancient past and that it may still exist on this planet. In reality, scientists don't know what weird life is, but its presence has many reexamining notions of what alien life may be and where it might be found.

Whether or not the plasma crystals are an example of weird life is difficult to determine. Some of the questions regarding these potential organisms come back to the debate about what life is. For example, on Earth, we consider life to be carbon-based and dependent on the presence of water. Life forms also perform certain basic functions, like reproducing, evolving and metabolizing. But even using those functions as a classification can be tricky. David Grier, a physics professor at New York University, told New Scientist that "there is no mathematically rigorous definition of life," which makes it difficult to call these crystals "alive" [source: New Scientist Space ].

Gregor Morfill, one of the experiment's participants, said that while the crystals contain a lot of the "hallmarks" of life, they're still "just a special form of plasma crystal" [source: New Scientist Space]. Another of the researchers, V.N. Tsytovich, said that the clusters have "all the necessary properties to qualify them as candidates for inorganic living matter" [source:Science Daily]. The researchers also stated that while they're not ready to confidently state that these structures represent a new form of life, their study should add to the discussion of how scientists define life [source: USA Today].

If the plasma crystals do exist in their simulated form, they live and develop at a pace at least a hundred thousand times slower than Earth's biological organisms. The question is then raised: given their fragility and slow pace of development, can they become intelligent or sentient?

If they are considered life, it may mean that these organisms are the most common life form in the universe, given the prevalence of plasma and massive interstellar dust clouds. There has also been some suggestion that these inorganic life forms somehow spurred development of organic life on Earth.


9:11 PM

Monday, April 28, 2008,

HELLO PEOPLE!

It's CSM this Wed. (Tsktsk, they kope our shortest day lah. Bleah!O:) Report at terraces at 0715 in Fac Shirt and pants/ skirt. It'll end at around 1100.

And after 1100..


IT'S CLASS OUTING!(: Yayee. Uhm I'm thinking maybe we can hang out in town? Tho I think many ppl'll hit that area.. Are there any suggestions? Haha!

We'll prob lunch and perhaps catch a movie or go arcade or idk just walk around bah..? See how things go first!

Come lah come lah! The next day's a public holiday leh!(: Hehe. And right, we've not'd a successful class outing so far leh..): Haha. So let's all go on wed okay!(: Hehe.

<3,
Huiqi!

6:18 PM

Wednesday, April 16, 2008,

Widjaja is leaving soon (he's surprisingly good at/in (shit my grammar sucks) teaching for his age, in my opinion).


Wanna buy any present for him? Or maybe make a card or something?


Some bio soft toys XD


Brain cell


E. coli


RBC


Salmonella bacteria


WBC


No.



But seriously... Any suggestions?


Bio Rep,


9:20 PM

Friday, April 11, 2008,

hey mr widjaja is leaving soon :( will be missing such an interesting bio teacher haha) anw here's him acting shuai!
haiz anyway shall we do a photo scrapbook for him when he leaves? here're links to his photos while he was in his jc days!
http://erik.a-cro.net/blog/
http://users.livejournal.com/_angelman_/

<3 chipmunk:)

10:18 PM

Monday, April 7, 2008,

HELLO!

once again, there is a inter-ct blogging competition!

it is exactly like the last one except this one is all about ECONOMICS!

i shall write the information here.

1.TASK

Classes' blog entry may include the following:
  • Review of interesting economic articles from journals or internet
  • Economic jokes/cartoons that illustrate certain economic concepts.
  • Video clips depicting certain economic concepts
  • Q & A's, "forum-like" postings on views and comments that are economics related among class members
  • Any other relevant economics postings that will enhance the class's blog (i.e. ILP work. etc)
2. RULES AND REGULATIONS
  • All blog entries need to be original and not a duplicate of any print, otherwise, state the source of the entry and acknowledge the writer/author concerned
  • Entries must be suitable for publication (i.e. not obscene, offensive or indecent) and must not have been submitted in other contests or been previously published
  • Role of class members: (a) direct involvement in design of blog - template, content, updating and so on. (b) actively participate in the blogging activities
3. JUDGING CRITERIA
  • Content Relevance (Application of Concepts) : 50%
  • Active and consistent class participation: 30% (this component of the marks will also contribute to your individual class participation marks which is part of the the Continual Assessment)
  • Creative use of multimedia (e.g. flash, music, photographs) : 20%
4. PRIZES
  • Best blog will receive a cash voucher of $200 while next 2 best blog will receive a cash voucher of $100 each
  • Results announced on 25 July
okay, so people if you do not know what to write or post about, just look at this post! :D

HAPPY BLOGGING!

YUJIE

9:41 PM

Saturday, April 5, 2008,

HELLO.

SAD NEWS.

CLASS OUTING TMW IS CANCELLED!!
perhaps ecp's kinda out of place for you guys bah. plus all the upcoming stuff..:/

))):

Hm, but what about just a simple dinner on monday in the early evening after school?(:

Haha.

7:10 PM


CT OUTING!

Date: 6 April (Sun)
Time: 1000 – 1800

Venue: East Coast Park
Meeting place: ECP MACs

Activities:
01. Cycling
02. Roller-blading
03. Kite-flying
04. Bowling
05. Frisbee
06. Arcade
07. ?? (any others!)

Timeline(?!):
1000 – 1200: Activities
1200 – 1330: Picnic (tentatively)
1330 – 1500: Activities
1500 – 1600: Arcade
1600 – 1700: Bowling
1700 – 1800: Dinner

Uhm.. the above's just a rough plan of what we're gonna do lah. Cause we don't wanna stone at ECP. Tho it'd be good for uhm, suntanning?O: Haha!

People, come come!

Okay, come, let's take a look at the reasons as to why you should come:
01. We're not going home late!
02. There're no tests this upcoming week! (GP can't study one lah, haha)
03. We've not had a proper ct outing with many many people!):
04. We needa exercise more often according to Mr Lock.
05. Class birthday is the next day!

Aiyah, so basically right, just come! Lai lai lai!(: Hehe.

Love,
Huiqi(:

12:12 AM