imalipusram
  • Member for 1 year, 7 months
  • Last seen more than 1 year ago
  • Taipei, Taiwan
3 answers
5 votes
650 views
Net production of CO2 in plants
9 votes

Plants are able to store energy as carbohydrates, i.e. they can make more carbohydrates than they need for their metabolism when there is no sunlight, and store it for later use. So the amount of ...

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4 answers
12 votes
1k views
How is exact racemization possible?
8 votes

It's just theory vs. real life. When mixing components, you always have limitations with the purity of chemicals and the accuracy of the balance available. When you look at chemical reactions which ...

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2 answers
10 votes
388 views
Looking for an old (1950s) "chemical experiments" book
6 votes

There are 2 books in German which inspired me to become Chemist. I had them in the late 70s. "Chemische Experiemnte, die gelingen" (Chemical experiments which succeed) and "Organische Chemie im ...

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1 answers
-4 votes
36 views
What would weigh more? A ice cube or water, if the ice cube is from the same amount of water
3 votes

Yes, as the amount, i.e. the number of molecules involved, does not change. Unless you look at it from a relativistic point of view, where you have to subtract the mass equivalent of the heat that is ...

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1 answers
2 votes
62 views
Treating styrene in the atmosphere
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3 votes

Spraying another compound to neutralize styrene (which is difficult) or whatever it was is probably not helpful, as it takes too long to spread and other potentially harmful materials are introduced, ...

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1 answers
0 votes
73 views
can you explain the structure of gemtuzumab ozogamicin? where are the linker boundaries?
1 votes

The trick is probably the disulphide bridge which will be cleaved by reduction, once the construct has been internalized into the target cell, liberating the drug. So I'd consider everything proximal ...

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2 answers
1 votes
47 views
How can I have iron powder without a fast reaction with oxygen?
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1 votes

Iron will react with the oxygen in air, just at a very slow speed. When you make the particles really fine, however, their surface to volume ratio becomes bigger, the energy that is set free by the ...

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1 answers
0 votes
25 views
Can MCM-41 (mesoporous materials) be used for ion exchange?
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1 votes

Ion-exchange resins need to have charged groups that can bind your ions of interest. If a certain ion-exchanger will work for your problem depends on what kind of ions you want you to exchange or ...

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1 answers
0 votes
49 views
Meaning of hydrogen bonds for life
1 votes

Water is (almost) everywhere on earth in copious amounts. It is liquid at earth conditions (H-bridges!). It's rather non-toxic (or organisms were able to evolve to tolerate water well). It is a good ...

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1 answers
1 votes
32 views
Limiting the minimum percentage of oxygen in atmosphere maintained by an oxygen absorber / scavenger?
1 votes

Oxygen absorbers have the purpose to prevent food spoilage by oxidation (of fatty acids, flavors, etc.), so the desire is to remove oxygen as much as possible and also to bind small amounts which may ...

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2 answers
4 votes
119 views
Experimental measurment of thiosulphuric acid decomposition kinetics
1 votes

Measuring conductivity over time might do the trick (7 ions (8 charge equivalents) in, 4 ions/charge equivalents out). Regarding spectrometry: you could deliberately make use of the light scattering ...

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2 answers
1 votes
142 views
How can I dissolve a precipitate when stuck to the side of a boiling flask
1 votes

Your precipitate is very likely iron oxides. First make sure you get the remains of the hydrogen peroxide out completely (e.g. by flushing several times with a little distilled water), then use an ...

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1 answers
0 votes
51 views
What is the name and formula of this structure?
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1 votes

That's Atorvastatin, a cholesterol lowering drug (works by inhibiting the enzyme HMG-CoA reductase). https://en.wikipedia.org/wiki/Atorvastatin For more data, see e.g. https://www.trc-canada.com/...

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1 answers
-1 votes
131 views
Reaction of copper oxide with acid
1 votes

Is it because copper ions are just spectator ions, where the real reaction happens between hydrogen ions and oxygen ions? ... Therefore it does not matter whether copper is less electropositive than ...

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1 answers
0 votes
936 views
Why Calcium Oxalate is insoluble in acetic acid?
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1 votes

Calcium oxide, hydroxide and carbonate react with acetic acid to form calcium acetate. Calcium oxalate does not react. Edit: In real life, you'll of course will end up with a little oxalic acid and ...

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1 answers
0 votes
44 views
How do CO2 Fire extinguishers procure their CO2
1 votes

They just buy it from companies producing CO2. Actual sources may be sequestration from combustion (e.g. power plants) or fermentation (e.g. ethanol production) processes.

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2 answers
3 votes
9k views
How much time liquid mercury takes to evaporate?
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As the comments in the other post say, there is no need to worry. You'll probably get more mercury and in a more dangerous form by eating fish and seafood and even more if you should smoke. To stay on ...

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1 answers
1 votes
29 views
Safe coating to make a 3D printed respirator mask airtight
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You need something flexible and airtight. Could neoprene fabric, like it's used for diving suits do the trick, esp. for prototyping? Otherwise, I thought of injection moulded silicone, as it's used in ...

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2 answers
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223 views
Reaction of metal carbonate with acids
0 votes

In solution, Na+ and Cl- will stay hydrated, they won't recombine to NaCl (which actually is the representation of the ions organized in a crystal lattice). The CO32- is in an equilibrium with HCO3- ...

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2 answers
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336 views
Which method can be applied to separate ferrofluid liquid from oil?
0 votes

You might be able to recover the magnetic particles by extraction with a suitable solvent (thinking of petroleum ether or hexanes) in order to get rid of the oil. A frit might come handy.

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