Why is base-catalyzed hydrolysis called base catalysed when u don't get back ur initial catalyst in it's original form (OH^(-))?
Iβm trying to see how pH affects the concentration of salicylic acid through hydrolysis. Iβm unsure of which pH I should use (atleast 4) and how I make the solution of pH. Any tips would be great
I did this simple NaOH hydrolysis reaction with methyl 6-formyl picolinate: https://imgur.com/YrnWdUc
Why are there so many extra aromatic peaks when there should be only 3 dd's in total, like the starting material had? I ran the TLC analysis using EtOAc/MeOH plus a few drops of AcOH, and only saw one elongated streaky spot that was faintly visible under KMnO4 dye, which I believed was the aldehyde product.
I stirred at RT the substrate (200mg) in 1:1 THF/H2O (15mL) and 1M NaOH (10mL) for about an hour, then evaporated the THF, acidified the aqueous solution with 1M HCl (12mL), then extracted into EtOAc. Literature source: https://doi.org/10.1039/C8CC07706A
The product looked impure, so I triturated it in some CH2Cl2 and got a nice looking tan solid.
TIL that there's such a thing as aquamation, which is basically cremation but the body is placed in a pressurized bathtub instead of a furnace. I understand that it uses heat and alkalized water to dissolve the body yet leave the bones relatively intact, but I guess it's hard to visualize exactly how it works on a molecular level.
I have a simple setup for performing hydrolysis, and I have noticed that more volts = more bubbles. However, increasing the voltage beyond a certain point (around 16V) causes the bubbles to stop forming on the electrodes. Is there a reason for this?
what use does the acid-catalyzed ester hydrolysis in real life/research or in chemical industries?
i know base-catalyzed is for saponification etc
Can you do a base hydrolysis in DMF or acetonitrile? With H20 as a second solvent.
Also would it require moderate heat to hydrolysis a alpha,beta unsaturated ethyl ester? Thanks
Report of the Expert Committee to Review available information on Paleochannels (2016) - http://cgwb.gov.in/Ground-Water/Final%20print%20version_Palaeochannel%20Expert%20Committee_15thOct2016.pdf
Study Shows Indus Valley Urban Centers Developed After River Departed - https://iitk.ac.in/new/index.php/indus-valley-urban-centres-developed-3-000-years-after-river-departed
Counter-intuitive influence of Himalayan river morphodynamics on Indus Civilisation urban settlements - https://www.nature.com/articles/s41467-017-01643-9
Paleohydrology and Harappan river-valley civilization - https://atlasofscience.org/paleohydrology-and-harappan-river-valley-civilization/
Oxygen isotope in archaeological bioapatites from India: Implications to climate change and decline of Bronze Age Harappan civilization - https://www.nature.com/articles/srep26555
Tracing the Vedic Saraswati River in the Great Rann of Kachchh - https://www.nature.com/articles/s41598-017-05745-8
Saraswati River in northern India (Haryana) and its role in populating the Harappan civilization sites - A study based on remote sensing, sedimentology, and strata chronology - https://onlinelibrary.wiley.com/doi/10.1002/arp.1829
Did the Harappan settlement of Dholavira (India) collapse during the onset of Meghalayan stage drought? - https://onlinelibrary.wiley.com/doi/full/10.1002/jqs.3178
Satellite Remote Sensing Techniques to Unearth the Lost Sarasvati River & its Paleochannels by Dr. B.K Bhadra - https://youtu.be/n1M8HULDbt4
Assessing the Palaeohydrology of the lost Saraswati River in the Punjab-Haryana plains, northwest India from satellite data - https://www.sciencedirect.com/science/article/abs/pii/S0031018221005010?dgcid=author
Oldest Securely Dated Evidence for a River Flowing Through the Thar Desert, Western Ind
... keep reading on reddit β‘
Random, but does anyone think a reduction with borane THF (and additional THF added as necessary to keep the reaction from drying up) at 65Β°C for 96 hours is strong enough to hydrolyze an aromatic ring in phenylalanine? I didn't think it was, but I'm getting some weird results in my NMR that indicate virtually nothing in the aryl region following the reduction (but NMR shows the presence of aromaticity prior to reduction)...
This is my IA and I have some doubts with the procedure: i am dissolving the aspirin in water and heating it until it is fully dissolved, however it is very unsoluble and there are some particles floating no matter what I do, what should I do? It still ok?
Journal of the American Chemical SocietyDOI: 10.1021/jacs.1c09328
Agnidipta Ghosh, Courtney N. Niland, Sean M. Cahill, Nishant M. Karadkhelkar, and Vern L. Schramm
https://ift.tt/2Xto322
https://en.m.wikipedia.org/wiki/ATP_hydrolysis Wiki page on ATP hydrolysis talks about how ADP + Pi both have lower energy states than ATP. Pi has a resonance structure like benzene, because it is symmetrical, therefore more stable, thus lower energy. Then it says the energy difference is released as useful energy. My question is if it is safe to assume this energy is released as photons? Sort of like when electrons transition to lower energy levels they emit a photon with carrying the energy difference. If this is true then ATP hydrolysis releases photons that are absorbed by proteins to perform work. ββββββββββββ- Thank you for your answers. https://aip.scitation.org/doi/full/10.1063/1.4709420 There is this paper that talks about how proteins absorb ATP hydrolysis energy by amide bonds. It says it produced excitons, i.e. when an electron is moved higher in energy state and an electron hole is left in its place. I am not a physicist unfortunately. So then it says this energy is released as photons that are absorbed by other amide bonds and so on. This way it is transferred across the protein. From what Iβve read excitons are typically a product of absorbing a photon so maybe, ATP hydrolysis does release useful photons? Idk. But I donβt think you can say it is released as heat, because heat is a macroscopic property which is velocity and momentum of microscopic particles, so it does not exist at single molecule scale. In other words heat is not a thing or substance by itself, so it cannot be released. As of changing free energy etc, I donβt think it is a mechanistic explanation, rather an abstraction. Thank you for your answers
I'm doing my IA on the effect of pH on activation energy of aspirin hydrolysis. It's a little fussy since I need to change pH as well as temperature to plot the arrhenius plot. I was wondering if anyone has done something similar before (changing pH or temperature)? I wanted to check whether my data values are right and whether it's a good topic to do?
Question is:
The reaction that occurs to hydrolyse surcose into glucose and fructose requires a specific enzyme sucrase , as this will allow the reaction to occur a typical biological temperatures. Explain why surcose can only be hydrolysed by the enzyme sucrase not any other enzymes.
Aware Acid Hydrolysis is a thing but is Base Hydrolysis a thing?
Are any of you familiar with the two companies and their technologies?
Cambi just signed a contract with Sasol to treat industrial waste as well. In my eyes thermal hydrolysis has huge potential
https://www.cambi.com/what-we-do/thermal-hydrolysis/
