exchemist
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Posts posted by exchemist
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15 minutes ago, observer1 said:
what?
Look it up: it's an enzyme that breaks cellulose down, I think into monomer or dimer units.
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1 minute ago, raphaelh42 said:
hello,
i'm asking myself why someone would vote for a president that anyway will have thousands/million of votes (+1 is insignificant in this case IMO)
same about someone leaving a like on a youtube video that already have thousands.
is that part of what we call "union" ? or it's just a weakness that you practice to feel less small, more important ?
how do we call this phenomenon ?
Democracy?
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13 minutes ago, observer1 said:
how do it turn cellulose to glucose in the most cheapest way possible? here cellulose is paper (no ink)
Silverfish use cellulase, I think.
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1 minute ago, vv3rtigo said:
It's an E2. I wanted to know which alkene is more stable. Only this
And what do you think of the answers you have been given here? Do you now understand?
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4 hours ago, NTuft said:
Bollocks, you say?. https://en.wiktionary.org/wiki/intricate#English (not the OED, humor me):
From Latin intricatus, past participle of intricare.
Verb intricate (third-person singular simple present intricates, present participle intricating, simple past and past participle intricated)
(intransitive) To become enmeshed or entangled.
(transitive) To enmesh or entangle: to cause to intricate.Someone made it that way, so we use an adjective to describe that. Examine how the OP(original post) conflates a theological idea of salvation only inside the church or salvation of the elect (not by works) with in-group vs. out-group preferences, commonly known as rayyyyyyyycism. This intricates the issue to one including two hot button issues that are then resolved into not an actual question, random capitalization, and a declaration of might makes right in an intricate display of sophistry. This is my supporting evidence for my claims, and, I SAY GOOD DAY, SIR. BALLOCKS!
You are right: I stand corrected.
My full version of the OED gives two meanings for the verb (summarised by me) as: to render intricate, or to entangle or ensnare. The OED however describes it as "now rare" and all but one of the examples of its use are from before 1750 (the exception being a Dundee journal, in 1900).
So using it as a verb today is a fairly bizarre choice, liable to confuse.
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7 hours ago, geordief said:
Strange though that both China and Russia claim,from what I have heard to have become disillusioned with the West(along with many of our own citizens)
Do they feel that gives them some sort of moral high ground even though they are sitting in the moral gutter?(I concede that the Chinese CP has lifted its citizens out of poverty and that Russia has ,like every state legitimate security interests)
I thought both China and Russia have recent histories of personality cults.They seem to have a tolerance for them.Russia may well be on the way down but I don't see that with China (the future,particularly ours is a very cloudy territory)
China’s handling of Covid is an example of autocratic hubris. How will they get out of it?
And, longer term, they are sitting on a huge demographic timebomb.
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1 hour ago, geordief said:
Couldn't we all?
If anti democratic regimes become the norm then China will be primus inter pares and the democracies may eventually only survive under its suffrance
And the US may not remain the bulwark we might wish for if the dice fall the wrong way there (it was a land of hope and aspiration and may fall off its bike when that well is poisoned)
How long will Europe et al survive if they are cast adrift?
China has its own problems. The move to a cult of personality sows the seeds of downfall.
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33 minutes ago, Janus said:
In addition, China's "support" of Russia only goes as far as what China sees as benefiting themselves. They would not be adverse to "supporting" Russia in an endeavor that would ultimately weaken Russia.
Indeed, I see they have succeeded in prizing Kazakhstan away from Russia's orbit and into their own. Russia itself could one day end up being a satellite of China!
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1 hour ago, chenbeier said:
You are right,if it is E2. I was thinking it is E1.
But with E1 it will be a carbocation, surely, which Me can stabilise as alkyl groups are slightly electron-donating? (I admit it's many years since I did this stuff.)
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39 minutes ago, chenbeier said:
The first molecule will be built because after Elimination the Cl. The carbanion is stabilized through the methyl group.
If it's E2, surely there is no charged intermediate, is there?
If it's E1, I think I'd expect Cl- to leave and the resulting carbocation to be stabilised by Me. Or am I getting mixed up?
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38 minutes ago, studiot said:
I don't see the chloro unit in your picture ?
That's because it's been eliminated in the formation of the double bond.
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34 minutes ago, vv3rtigo said:
I don't think so, we didn't study this rule.
OK but won't the Me group influence the proportions of 2-3 vs. 3-4 double bonds? What effect do you expect it to have?
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32 minutes ago, PeterBushMan said:
Why China, Vietnam, North Korea support Russia?
China, Vietnam, North Korea all called Russia as big brother.
Mao called Satin as big boss.
Chinese Called Stain as Kind father, "cifu".
Chinese President Dr Sun Yat-sen said "Russia is our teacher."
The West laughs at Russia lost a war to Japan, which Japan lost more soldiers. The West must forget the battle of Singapore, and the battle of Indonesia.
China and N Korea are ruled by totalitarian despots like Putin, so the answer is obvious. Vietnam has not sided with Russia but is maintaining a neutral stance.
The rest of your post is too incoherent to respond to - though a sort of blurred hatred of the West seems to come through.
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30 minutes ago, vv3rtigo said:
Yes it's an elimination reaction (E2) with NH3 as a solvent. The substrate is: 2-methyl-3-Chloro-4-Fluoropentane.
The products are two alkenes (i put them in the photo but I don't why you can't see it). One of the alkenes has the the double bond on the C2-C3. The other one on the C3-C4.
My professor wanted to know which product is more stable.
Ah, is this about the Zaitsev Rule?
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9 hours ago, vv3rtigo said:
Hi, a few days ago i took an exam and there was an exercise that required to do a scale of stability of the alkenes.
I had to do an E2 with NH3 on the 2-metyl-3R-Cl-4S-F pentane. I obtaneid these two. Which is more stable and why?
Sorry i forgot the F on the second one.
What does "do an E2 with NH3 on the 2-metyl-3R-Cl-4S-F pentane"mean? E2 I assume means an elimination reaction, somehow involving ammonia, but what are the substituents on pentane and what were the 2 products? There seems to be a .jpg file attached which we can't see.
If you use a few more words, it may help to clarify what this is about.
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6 hours ago, Ned said:
I don't think it exists , I think what we call darkness is just simply when objects are not illuminated .
This is so idiotic I burst out laughing.
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1 hour ago, John Cuthber said:
The plan is to give vast sums of money to an industry that is already making a huge profit from the turmoil of war.
Then to get the taxpayers to pay for that handout.
The rationale behind this is that the government is paid by the energy companies.
Yes there's a lot of pious nonsense talked by Truss about not putting companies off investing. But the business cases on which these oil and gas, or renewable generation, investments were made never envisaged profit margins anywhere close to what they are earning at present, thanks to Putin and the war. I am convinced the major fossil fuel companies expect to have some of it clawed back. But they are not going to volunteer to hand it back, obviously, because of duty to their shareholders.
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15 minutes ago, studiot said:
I'm suprised that you would actually reach 4. +1
I always thought 3.7 was the maximum.
By the way picric acid is far less dangerous and much more fun.
Yes, you're right about 3.7. I was quoting only an approximate figure.
I used to make "nitrogen tri-iodide" * at school, which we painted on the stone steps to the lab. When the teacher arrived his heels crackled and emitted little puffs of purple smoke, which was most gratifying and psychedelic (this was 1971).
* More properly an adduct: NI3.NH3, apparently.
My tutorial partner at university had made picric acid at school, which was the basis for a rather a good end of term prank. The school song would be sung, to piano accompaniment, and there was a bridging passage between the verses, employing one note that was not otherwise in the piece. So they painted that piano hammer with picric acid and when the moment came there was a satisfying BANG, accompanied by a cloud of dust, dead ladybirds etc., from the interior of the piano, followed by an eerie pause, before the pianist hesitantly took up the tune again.
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7 hours ago, Bufofrog said:
My sock puppet alarm is going off!
On this forum, the names seem a bit different from the one I listed, viz. MeredithLesly, BlueSpike, Frank_Baker, LisaLiel.
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1 hour ago, paulsutton said:
I spotted this on Twitter and decided to share as it is science related
19th to 23rd September is peer review week
I am not associated with this, just sharing the information.
The question "Is Research Integrity Possible without Peer Review?" could make an interesting discussion at some point.
Paul
It's obviously possible, but how would the community have confidence in it?
Furthermore the issue is not so much integrity, but quality control. There is plenty of poor science done in good faith, i.e. with integrity, but also little or no value. There are occasional scandals of bad faith or fraudulent science but the main job of peer review is to maintain quality, isn't it?
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1 minute ago, hellohey said:
how hard do you need to hit nitroglycerin to ignite it
About 4.
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4 hours ago, Bufofrog said:
My sock puppet alarm is going off!
Yes it’s LisaL, Gaiagirl etc etc, back again. The funniest one from this person was the man allegedly strangled by his own thymus gland. And the various spontaneous combustion ones (Frank Baker et al).
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This is unfolding just as I predicted. I hope everyone is enjoying their turn on the Theorist magic roundabout. He can keep it revolving almost indefinitely.
I'm saving my remaining 50p coins for something else.
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3 minutes ago, studiot said:
I thought the nazis were the National Socialists.
All modern neonazi movements (German, Austrian, Italian, Danish and now Swedish) are far-right, so far as I am aware. Normally, xenophobia is the bedrock of their appeal.
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The West will continue to fall, since the politicians use lies to fight with Russia
in Politics
Posted
To what? Their vaccine doesn't work very well and people don't trust it, so much of the population is exposed to significant risk if they catch the virus. They would need to import gwailo vaccines and convince people to get vaccinated, which is a massive undertaking, or else just accept the deaths and strain on their medical system. Even after the elections, Xi would risk a tsunami of public wrath if that happened.
There is nothing they can do about the demographic time bomb, so far as I can see.