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Vvi
Member Since 02 Sep 2008Offline Last Active Private
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- Age 21 years old
- Birthday February 26, 1991
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#54778 Chemistry - The Effectiveness of Sunscreen?
Posted
biochem
on Aug 10, 2009 - 01:38
I am not sure what you meant by, "How many doctors do you know that are doing an EE?" Did you mean to say that it was a relevant topic despite the heavy research that can be googled?
Simply noting active ingredients in tests is not of appropriate science topics. anyone here who has gone on to independent research with a professor will tell you that just cannot neglect the vast amount of ingredients involved in items. For example, here is a really great example. Students in my school for bio IA, without consulting my teacher, decided on a topic and signed up for it on the wall by posting "what effect do different concentrations of [active ingredient] have on the metabolic rate of Daphnia?" (metabolic rate is amount of times they swim per minute, or flap their little swimming structures). What you are saying by this statement is that you have only tested a pure ingredient of (100%) that active ingredient. While in fact on the bottle it will read anywhere from 5% - 60% active ingredient.
Here I will show you even using a sunscreen from my house.
Active ingredient: Homosalate 10% + Oxybenzone 6%
Right? You think now let me go ahead and test... Now please account for "stability" of compounds and overall effectiveness (meaning here capable of absorbing or blocking ultraviolet light). Here are some of your variables that you should consider:
1. Avobenzone 3%
2. Octocrylene 2.8%
3. Octisilate 5%
4. Ascorbic acid
5. Behynyl alcohol
6. BHT
7. Butylenes glycol
8. Butyloctyl salicylate
9. Caprylyl methicone
10. Diethylhexyl 2,6-naphthalate
11. Dimethicone
12. Disodium EDTA
13. Ethylhexyl stearate
14. Ethylhexylglycerin
15. Ethylparaben
16. Fragarance ( Not even told what it is, the organic compound, that is responsible for their trademarkated scent)
17. Glyceryl stearate
18. Glycine soja (soybean) protein
19. Methylparaben
20. PEG-100 stearate
21. Phenoxyethanol
22. Propylparaben
23. Silica
24. Sodium polyacrylate
25. Strene/acrylates copolymer
26. Tocopheryl acetate
27. Trideceth-6
28. Trimethylsiloxysilicate
29. VP/hexadacene copolymer
30. Water
31. Xanthan gum
Now..that is off a small bottle of Aveeno sunblock. Could you imagine trying to tell a chemist somewhere around the world, that you attributed stability of a compound or found anything remotely definite about your research based upon only what in this case would have been 16% of an ingredient. They would laugh and knock away at points in focus + more.
Stability or anything testing these compounds? Well as a chemist, and according to the list of ingredients, one involved in organic chemistry you would be analyzing the functional groups and seeing how they react with ultraviolet light. Then using what you have studied for years, you would synthesize a report based on areas of concern and put forth ideas about how if a (this is an example based upon no actual analysis of the ingredients) dehydrogenation reaction was to occur by introducing this product, you would stabilize the bond structure of this compound and disperse the electrons in this in order to form an aromatic carbon (common thing in organic chemistry is to find areas where electrons can be used so that their concentration decreases, or in other words break double or triple bonds).
the topic..even for grad students would be a difficult one, and ultimately you would be looking at ordering these compounds and then testing them at the temperatures exposed to normal sun (to have logic in saying that anything is affective, you must meet air pressure, temperature and other controls in order to say that a comparison between two compounds that are isolated is there).
here is another thing you must do. It is a phenomenon not yet explained, but is always treated with attention.
Consider the following: synthesized amounts of vitamins (lets use B12 vitamin), do not offer the same type of support or use as those introduced by normal fruits. That is to say that a fruit which makes B12 vitamins and that is eaten, is more effectively used by the human cell than those compounds put under polymers and organic reactions. Why is that? not important here. What am I trying to tell you? You must now mention and give insight to the fact that your active ingredients were treated under isolated conditions, without the interaction of the other 30 ingredients, and then you might go on to say that definitely you know in the presence of this that happens.
Why is that important? Because some compounds, lets use for an example,Diethylhexyl 2,6-naphthalate are no longer those names. They are lsited as such maybe due to the fact that once introduced to the mixture you form Diethylhexyl 2,6-naphthalate. Isolated it might not be s extractable, and if so, the bonds might change and the name now could be something different.
My point is, I am not just saying all these random things, but this is what a scientist will look at. Are we scientist? No, but if you are sending your report to one then dont regret the fact that a professor might see your report as totally off and lacking focus in certain areas. I have done independent research, and anyone here who has also, will tell you that professors will not accredit any study if large variables are present. They will refuse to place their name on papers that will go on and on about what could have happened and other crap. What they want to see for IB, is that you Can do focused research. That is, the overall innuendo of the guide for G4 says..simplicity. You take what you have, and you run with it to the end. If your lab is concerning titration, you explain the equivalence point and everything about it to the point of no more in order to get that high grade. This is what Ib wants to see, that you did something and took it to that level.
Best of luck, and I hope I helped you out. You definitely want to be able ot go into undergrad and say, look I did this really interesting and unique experiment and this is what I found. Then you might get started on research right away. If you did something like sunscreen, the grad student you are working under might polity reject your desire to work for them and take someone who for example did something like "different concentration of a specific chemical in mushrooms" (this was Irene's EE for chemistry that had focus as a topic, and received an A).
#53871 Extended Essay
Posted
deissi
on Jul 30, 2009 - 20:54
Kez, on Jul 30, 2009 - 17:20, said:
#52341 I'm literally ****ed
Posted
Adamsuuu
on Jul 16, 2009 - 11:08
I just finished IB1 & omw to IB2, The past year I didn't pass a single physics test (HL), neither did I pass any of my math tests (that's too HL, although it's not called HL)I manage all occurring tasks etc on all lectures although I don't take any notes so the very next day it's all outta my head again.I mean why take notes, it's all in the books right?
I've got EE to be handed in after the summer vacation and did I start yet?....Well not really.. Do I have any sources?..well no cause I didn't show up the last week before the vacation to retrieve any books and you can't write your EE without any sources afaik. Is it really that important to get your supervisors feedback on your first draft..?
I actually passed like 3/10 biology tests so I guess that subject's going just fine.
What's the problem? Well It's not a matter of learning difficulties, it's more like a matter of motivation & starting to do stuff but I mean, I can't possibly imagine taking time to do homeworks & other assignments, it just feels wrong.
Neither am I reading any books, thus far I've managed to write essays & all imaginable tasks in my native language (Swedish) without anything read yet, but as the IB test or w/e you refer to it is coming ahead I'll need to know all pieces by heart.
I wish all subjects were more like Business & M since you don't really have to do anything to pass that, it's all about using your common sense and you're fine
And let's not even mention CAS unless you have any outstanding ideas of how one could pass that in a rather simple way
#50118 ib schools in greater toronto area
Posted
Irene
on Jun 16, 2009 - 11:50
- wonderful people, decent teachers (I guess), average overall performance
- graduating class (diploma 2009) is ~20ish
- excellent faculties: the school seems 'richer' than most
- the IBC is apparently Parmagiani now? not sure how that went down, haha
- can smell pot smoke in the halls between classes
Glenforest SS (Mississauga)
- wonderful people, some exemplary teachers, others decent
- overall competitive academic environment, above average performance
- graduating class (diploma 2009) is ~55ish
- decent faculties (you have everything you need), just not as good as Bateman's
- a small minority smoke/drink/do drugs... it's barely present though
Personally, if I could choose again, I'd pull the people I've met from Bateman (no offense to anyone
#50509 Iranian Election Crisis
Posted
Sandwich
on Jun 20, 2009 - 10:36
I actually think that Ahmadinejad would have won anyway, but I don't think the elections were fair. It is my understanding of it that he even announced he'd won in places before the election results were even announced! He also won in Mousavi's home town which is statistically extremely improbable. A huge proportion of the young voters and female voters ought to have voted for Mousavi, but they had massive turn-out on the day, which means that it wasn't just the people who wanted change who all flooded out to vote, but also the hard-core fundamentalists who want it kept as it is.
On a personal level, I believe Iran is too politically unstable to be trusted with nuclear technology. I think it's a crime to deprive them of it in order to supply themselves with power etc., but they're simultaneously likely to be a threat. It's the seat of fundamentalist Islam in many respects as there are few controls over extremism there and the major problem with extremists is that they follow the terrorist ethos that
1. all of the West is evil
2. innocent lives can be sacrificed on a large scale with no warning to effect the destruction of the West
3. their lives can be given up in the process.
These are two principles highly incompatible with nuclear weapons capacity!! Nobody ever uses nuclear weapons because of the HUGE spill-out. Destruction on a supremely massive scale just can't be justified by anything except for on principles of terrorism. It may be extremely unlikely that anybody would want to destroy a huge section of the world like that UNLESS they had it as part of their agenda.
That's the only reason I'd worry if Iran had nuclear capacity. All it takes is one gang of mental people to cause unprecedented damage and destruction, and unfortunately the government, goals and transparency of the country is such that it's hard to feel secure they have it all under control at this moment in time.
I also think that what happens to women and the way they have to live their lives is criminal. Where's the choice? It's just not there, and it's soul-deadening. I've read all sorts of unpleasant articles about what happens to these women (and it's not necessarily actively being killed or beaten by their husbands, that's rare, but a significant number commit suicide because they can't stand being trapped where they are), and it's really quite appalling that the choice isn't there.
Being honest, I'd like for there to be some sort of revolution if only to get out of the horrible circle, but having seen the violence from the police trying to keep everything under control and Ayatollah's recent statement that those who go against the outcome of the election have to 'bear the full responsibility of the outcome on their shoulders' makes me simultaneously wish it on no person that they be the one to complain! It's certainly no democracy at the moment, regardless. No democracy fails to launch an enquiry when this sort of thing happens, no democracy has an overarching leader actually capable of taking decisions (similar set-ups, such as that of the UK where the Queen technically leads the country, are incomparable as the Queen has more or less absolute zero power or say in decisions) because then it's not really the voice of the people, it's the voice of a man and his council. Anything which goes on after that is going on underneath a higher authority, but that's just not the way democracy is meant to work, no matter how forgiving and go-with-the-flow that higher authority might be. By all evidence, Ayatollah appears to go along with the people's choice, but it seems clear that in this election, the choice of the people was not transparently dealt with.
#50297 Men 'outperformed' at university
Posted
Sandwich
on Jun 17, 2009 - 14:04
wikinerd, on Jun 17, 2009 - 13:20, said:
And no, I didn't quite see it that way; boys definitely don't get to fully understand the curriculum —— or at least to the point that the girls did. Again, no, boys are often too "lazy" (or rather, 'distracted') to "self-teach"——even though I personally know the few who do, that's hardly the "majority", the ones who are getting the bad results. But if they did, you wouldn't be reading that article on the "global phenomenon" and discussing this...
Unless, of course, you're just saying females are just more intelligent**, which means that you are, um, sexist— unless you've got the scientific proof to back it up. (which makes it a fact rather than a stereotype)
**If I didn't misunderstand, you're saying that boys are getting this low level of academic achievement even though they had understood the curricula just as well as their female counterparts — which means that the boys are unable to process and think with that information, and thus, less intelligent.
I thought your argument was that boys are disadvantaged by lectures and the style of teaching? In which case I was pointing out that lectures don't = understanding and that it is understanding which is important, because that's ultimately what will hit the high grades and what gets tested in exams. So the ability to understand is obviously there, but I was asking if you could think of an alternative to lectures in an attempt to teach understanding. In my opinion/experience there is no alternative to lectures.
By mentioning that it is understanding which is important and that lectures don't magically give you understanding of something (most people gain that through reviewing) I meant to point out that the issue does not lie with the teaching. If it lies anywhere, I would suspect it would be attitude toward learning. If you don't take the time to revise and go over things, you're not going to do as well as somebody who does, and there's no teaching method which can save any person, male or female, who doesn't go over stuff and understand it properly. It's just a fact that you're more likely to have a studious girl than a studious guy.
If you've not started IB yet then it is possible you've never sat proper external exams before (especially if 30% of what you've done is internal!) and in that case maybe there is an issue with your particular establishment. Examiners don't have a gender bias, though, and most people have sat official externals for important exams prior to the IB. Examiners, after all, have no clue who you are. These statistics are for University, not before it.
And seriously, relax a bit! This is a discussion, not a death match. No need to be aggressive, snarky or patronising. I feel for you that your posts are being negged, I don't think they should be, I have to presume it's because people disagree with either what you're saying or how you're saying it-- but it's not a reason to get heated with responses. I know the difference between a fact and a stereotype, and I'm happy to credit you with understanding, too! O:
#50279 TOK Presentation, Help!
Posted
samt_mansha
on Jun 17, 2009 - 08:56
#50123 Men 'outperformed' at university
Posted
wikinerd
on Jun 16, 2009 - 12:45
Vvi, on Jun 07, 2009 - 11:14, said:
Quote
Quote
Quote
Aboo, on Jun 07, 2009 - 23:31, said:
#49199 Should women marry for love or money?
Posted
Tilia
on Jun 08, 2009 - 16:32
#49632 dating in IB
Posted
DeStijl
on Jun 13, 2009 - 05:02
I'm not quite sure he did.
As much as I cared for him and wanted to be in his company more frequently, I simply couldn't find an abundance of time. Every spare moment I had was spent with him, because the relationship would die otherwise. I was completely and totally committed and determined to make it work.
Apparently my best just wasn't enough. He told me that spending only a couple of days each week with him was insufficient, and he didn't like that my number one priority was school. Thus, he broke up with me just before exams.
OH MY GOODNESS. I don't know why I'm ranting about this. Basically, if you can find someone that understands the time and dedication that IB requires, then I see nothing wrong with getting into a relationship. Perhaps my mistake was that I couldn't find the perfect balance between Le Boy and getting good grades...although I thought I did a pretty decent job. If you can achieve an equilibrim of sorts, then have at it!
#49336 Pre-IB/MYP Section?
Posted
Mahuta ♥
on Jun 10, 2009 - 11:25
But I think the main reason we dont have it here is because there aren't many students around that do the Pre-IB/MYP thing so I dont know if its going to be that active.
Besides, I dont think there will be lots of people who can provide help, at least not as much as the help provided in the IB Diploma forums we currently have.
The only help we seem to be able to provide is advice on the choice of subjects for the IBD program.
But most of us dont know much about the things required on the pre-IB program.
#49104 Men 'outperformed' at university
Posted
Sandwich
on Jun 07, 2009 - 19:58
Who cares about rationalising this?
We won!
#49107 Men 'outperformed' at university
Posted
Aboo
on Jun 07, 2009 - 20:17
#49129 Men 'outperformed' at university
Posted
Aboo
on Jun 07, 2009 - 23:31
Redstar, on Jun 07, 2009 - 21:24, said:
Aboo, on Jun 07, 2009 - 20:17, said:
By the sample of the population I go by, i.e. my friends and people I know, women have the edge to go further all around. I didn't say that all men are meat heads because they're not. I'm not one, and you're not one probably, I don't know you.
Smartness at life is measured by a lot of things. Their goals, what they want their life to be, how far do they go to meet those targets, their behaviour to the people around them. One can tell if the person he's speaking to will go far in life or not.
And I'm not saying either that all women are smarter, I should have made that clearer. There is a balance of smart people, not so smart people, average people and stupid people. This is why there are some people who fly high, and some people who just stay down and don't get anywhere in life. It may just be that in the smart people category, there maybe more smart women than men. And we're seeing it now because for the past so many years, and even today women were, and some still are, oppressed from doing what they want. We're seeing more women going forward today because societal repression is fading away.
And to those people who are trying to find a way to discourage female doctors, they're educated bigoted idiots who are still stuck in the early 20th century.
#47292 Just a personal problem
Posted
ROSEAN
on May 19, 2009 - 22:26
Does Harvard, Yale or the others offer undergraduate programmes in my favorite courses?
Does someone knows the most important universities in germany? WHU, EBS, LMU, MBS, LBS or the Frankfurt School of Finance and Management? What is about the Uni St. Gallen?
It is no problem, if I will go to London. I lived there a few years ago and my parents untill today. I love it so much to live in big cities. Another is the city where I was born: New York. I only heard of NYU, the New York University. Are there other good colleges in New York?
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