Any tips/resources on how to take long chain -> ring structure for a monomer? Thanks
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📰︎ r/predental
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📅︎ Apr 01
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I need help with drawing the reaction mechanism. My starting products are benzil, benzaldehyde, Ammoniumacetate and acetic acid and the end product is the Lophine monomer. I couldnt find anything about it on the internet. Help would be appreciated
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📰︎ r/chemhelp
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👤︎ u/jens_torp
📅︎ Apr 02
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Monomer/nail liquid storage

I’m tired of my nail kit smelling like monomer. How can I store my containers of monomer (small Mia Secret and CND bottles) that won’t stink up my nail kit or house?

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📰︎ r/Nailtechs
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📅︎ Apr 02
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What’s the monomer of the small subunit of rubisco?

I’m doing a god forsaken 27 page long frq fun fest over break and I cannot find the answer to this on google

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📰︎ r/APbio
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📅︎ Mar 30
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Nanoscale chains from a simple monomer held together only by noncovalent interactions. Making such a complex supramolecular structure from such a simple building block takes self-assembly to a new level. (source: Yagai et. al. in Nature, 2020 via cen.acs.org)
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📰︎ r/MicroPorn
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📅︎ Dec 22 2020
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Residual Monomer through GC Analysis

I've worked on adapting a GC/MS residual monomer analysis for PEG polymers for QC purposes and my production team is taking issue with one set of results, but agrees with the other sets. For this set in particular, they've also looked at the NMR data and noted that the batch they don't like has a very similar peak to a batch they do like, but the concentration of the residual monomer is 10x in the batch they don't like.

My colleagues and I have gone over all our work and the instrument, and the other batches all have values in line with expectations, so I can't figure out what else went wrong, but they're adamant it isn't on the production side. We have also retested the batch in question, and it came out similar (but lower), and we compared our results with another lab and those results were very similar (same samples at each lab, different batches). We have the other lab testing the questioned batch now.

Any ideas?

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📰︎ r/Chempros
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👤︎ u/boxian
📅︎ Feb 13
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What is the monomer of evil? Of good? What are the polymer and monomer of the in-between?
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📰︎ r/AskReddit
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📅︎ Mar 08
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Looking for a good monomer, please help!!!

Hi guys! I’m having a really hard time finding a monomer and polymer that i like! I have tried the Young Nails self leveling formula and that’s good, but i like to use forms and sculpt my nails & build 3D art, and i just can’t seem to get a buildable consistency with that one. it always ends up being either too runny or too dry, and that drives me nuts. I am licensed and can buy things on websites that require them, looking for all the opinions i can get! thank you!

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📰︎ r/Nailtechs
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👤︎ u/highangelx
📅︎ Mar 24
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How to remove monomethyl ether hydroquinone inhibitor from 2-hydroxyethyl acrylate monomer using basic alumina?

Might be a silly question, but how exactly do I remove the monomethyl ether hydroquinone inhibitor from 2-hydroxyethyl acrylate monomer using basic alumina column? As I’m not particularly familiar with column chromatography and haven’t packed an alumina column before. Can toluene be used as the eluent?

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📰︎ r/chemistry
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📅︎ Mar 08
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How monomers be bonding
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📅︎ Mar 08
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Question on monomer bonding with different materials in foam core panels

Most foam core FRP panels are glued and pressed after they cure forming mechanical bonds with adhesives(?) I want to make some fiber reinforced epoxy panels with male/female molds and pour 2-part polyurethane foam between them while they are still tacky. Would this result in covalent bonding between the tacky epoxy monomers and the urethane monomers in the foam? Would this be better than latex adhesives such as PL-300? I’m hoping to solve some delamination/durability issues for a lightweight composite off-road trailer.

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📰︎ r/Composites
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📅︎ Feb 22
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Monomer Controlled Switchable Copolymerization: A Feasible Route for the Functionalization of Poly(lactide)

A new monomer controlled self‐switchable copolymerization was developed with Salen‐MnIII‐Cl complexes. Chemoselective copolymerization of O‐carboxyanhydrides (OCAs) and lactide (LA) was explored without cocatalyst or chain transfer agent (CTA).

Abstract

Switchable polymerization is an attractive strategy to enable the sequential selectivity of multi‐block polyesters. Besides, these well‐defined multi‐block polyesters could enable further modification for wider applications. Herein, based on the reversible insertion of CO2 by Salen‐MnIII, a new monomer controlled self‐switchable polymerization route was developed. Chemoselective ring opening copolymerization of O‐carboxyanhydrides (OCAs) and lactide (LA) was explored without cocatalyst. The sequential conversion of OCAs and LA into the polymer chain could form multi‐block polyesters. Based on this strategy, a series of multi‐block polyesters with different pendant groups were synthesized. Furthermore, by modifying the propargyl‐containing copolymers with quaternary ammonium groups, we have realized antibacterial functionalization of PLA. These results imply the potential application of this strategy for the fabrication of functional polymers for biomedical applications.

https://ift.tt/3vyOjUR

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📰︎ r/ACIE
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📅︎ Mar 17
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Enzyme‐Instructed Self‐Assembly Enabled Monomer–Excimer Transition to Construct Higher Ordered Luminescent Supramolecular Assembly for Activity‐based Bioimaging

Enzyme‐instructed self‐assembly (EISA) enabled the monomer–excimer transition of a coumarin dye ( Cou ) at low molecular concentrations. The resulting higher ordered luminescent supramolecular assemblies (that is, nanofibers) efficiently recorded the spatiotemporal details of alkaline phosphatase (ALP) activity in vitro and in vivo.

Abstract

It is challenging to construct high‐performing excimer‐based luminescent analytic tools at low molecular concentrations. We report that enzyme‐instructed self‐assembly (EISA) enables the monomer–excimer transition of a coumarin dye ( Cou ) at low molecular concentrations, and the resulting higher ordered luminescent supramolecular assemblies (i.e., nanofibers) efficiently record the spatiotemporal details of alkaline phosphatase (ALP) activity in vitro and in vivo. Cou was conjugated to short self‐assembly peptides with a hydrophilic ALP‐responsive group. By ALP triggering, EISA actuated a nanoparticles–nanofibers transition at low peptide concentrations followed by monomer–excimer transition of Cou . Analysis of structure–property relationships revealed that the self‐assembly motif was a prerequisite for peptides to induce the monomer–excimer transition of Cou . Luminescent supramolecular nanofibers of pYD (LSN‐pYD ) illuminated the intercellular bridge of cancer cells and distinguished cancer cells (tissues) from normal cells (tissues) efficiently and rapidly, promising potential use for the early diagnosis of cancer. This work extends the functions of EISA and provides a new application of supramolecular chemistry.

https://ift.tt/2Xm29Kp

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📰︎ r/ACIE
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📅︎ Mar 03
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New fully recyclable polymers from lipoic acid, a natural molecule. These polymers are easily depolymerized under mild conditions. Some 87 percent of the monomers can be recovered in their pure form and re-used to make new polymers of virgin quality. rug.nl/news/2021/02/molec…
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📰︎ r/science
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👤︎ u/TX908
📅︎ Feb 05
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BEST Monomer

Anyone got any good monomer suggestions? Ive been using the EZ Flow monomer, but i feel like i can find a better one, I also have alot of mia secret products but i havent heard good stuff about the monomer. Also what are are your fav acrylic brands

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📰︎ r/Nailtechs
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👤︎ u/AlinaInfa
📅︎ Feb 07
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What’s a good monomer that has less odor and doesn’t have such a strong smell?
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📰︎ r/Nailtechs
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📅︎ Feb 11
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[ASAP] Synchronous Control of Chain Length/Sequence/Topology for Precision Synthesis of Cyclic Block Copolymers from Monomer Mixtures

Journal of the American Chemical SocietyDOI: 10.1021/jacs.1c00561

Michael L. McGraw, Ryan W. Clarke, and Eugene Y.-X. Chen

https://ift.tt/3pYIqfW

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📰︎ r/JACS
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📅︎ Feb 27
🚨︎ report
New fully recyclable polymers from lipoic acid, a natural molecule. These polymers are easily depolymerized under mild conditions. Some 87 percent of the monomers can be recovered in their pure form and re-used to make new polymers of virgin quality. rug.nl/news/2021/02/molec…
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📅︎ Feb 05
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Can somebody help me naming these monomers?
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👤︎ u/jxkob8
📅︎ Jan 13
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First time trying a smile line, mixing polish with monomer, AND trying the 90s style curved nail. I definitely need better tips cause shaping 😅 reddit.com/gallery/ku02o3
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📰︎ r/Nailtechs
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📅︎ Jan 09
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Styrene Monomer doubts

I was planing on make my first surf board, when looking for poliester resin found that styrene monomer (I allways have used acetone sustitute (wich by law is alcoholiester)). Styrene monomer is being sold for about 2u$d/litre, in hardwares without id request. I've never went that route anyway so for me only mean, I should start studing... my questions, is that clean enought to be used as precursor? If not how could I clean it. Also asking for recommendations what path should I choose.

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📰︎ r/BabyBees
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👤︎ u/rawcyanide
📅︎ Jan 11
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Halfway through my boss giving me this set I had to stop and give a pedicure lol, this is our attempt at using 7 star DIP powder as powder with liquid monomer! It worked perfectly!
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📰︎ r/Nailtechs
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📅︎ Jan 27
🚨︎ report
Çinko etrafında heksamer oluşturan insülin hormonunun kurdeleler kullanılarak üç boyutlu çizimi. İnsülin hormonunda bulunan altı monomer farklı renkler ile gösterilmiştir.
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📰︎ r/akagas
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👤︎ u/egeneges
📅︎ Feb 23
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Paired Copper Monomers in Zeolite Omega: The Active Site for Methane‐to‐Methanol Conversion

By employing anomalous X‐ray powder diffraction along with support from theory and other X‐ray techniques, the active copper site for methane‐to‐methanol conversion in zeolite omega has been determined spatially and quantitatively.

Abstract

The direct conversion of methane to methanol using oxygen is a challenging but potentially rewarding pathway towards utilizing methane. By using a stepwise chemical looping approach, copper‐exchanged zeolites can convert methane to methanol, but productivity is still too low for viable implementation. However, if the nature of the active site could be elucidated, that information could be used to design more effective catalysts. By employing anomalous X‐ray powder diffraction with support from theory and other X‐ray techniques, we have derived a quantitative and spatial description of the highly selective, active copper sites in zeolite omega (Cu‐omega). This is the first comprehensive description of the structure of non‐copper‐oxo active species and will provide a pivotal model for future development for materials for methane to methanol conversion.

https://ift.tt/37LEtnF

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📰︎ r/ACIE
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📅︎ Feb 03
🚨︎ report
Four months ago, Evie (LongHairPrettyNails) reviewed Suzie's (NailCareerEducation)'s starter kit. She disliked the price, the monomer that came with it, and the fact it yellowed her nails. Suzie then went on to call her unprofessional and inexperienced. youtube.com/watch?v=rINfa…
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👤︎ u/aokaga
📅︎ Aug 27 2020
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[ASAP] Protein-Activatable Diarylethene Monomer as a Smart Trigger of Noninvasive Control Over Reversible Generation of Singlet Oxygen: A Facile, Switchable, Theranostic Strategy for Photodynamic-Immunotherapy

Journal of the American Chemical SocietyDOI: 10.1021/jacs.0c12851

Hong-Bo Cheng, Bin Qiao, Hao Li, Jin Cao, Yuanli Luo, Kunemadihalli Mathada Kotraiah Swamy, Jing Zhao, Zhigang Wang, Jin Yong Lee, Xing-Jie Liang, and Juyoung Yoon

https://ift.tt/39t2v9c

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📰︎ r/JACS
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📅︎ Jan 28
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Construction of Highly Ordered Glyco‐Inside Nano‐Assemblies through RAFT Dispersion Polymerization of Galactose‐decorated Monomer

Glyco‐assemblies derived from amphiphilic sugar‐decorated block copolymers (ASBCs) have emerged prominently due to their wide application e.g. in biomedicine and as drug carriers. However, to efficiently construct these glyco‐assemblies is still a challenge. Here, we report an efficient technology for the synthesis of glyco‐inside nano‐assemblies by utilizing RAFT polymerization of a galactose‐decorated methacrylate for polymerization‐induced self‐assembly (PISA). Using this approach, a series of highly ordered glyco‐inside nano‐assemblies containing intermediate morphologies were fabricated by adjusting the length of the hydrophobic glycoblock and the polymerization solids content. A specific morphology of complex vesicles was captured during the PISA process and the formation mechanism is explained by the morphology of its precursor and intermediate. Thus, this method establishes a powerful route to fabricate glyco‐assemblies with tunable morphologies and variable sizes, which is significant to enable the large‐scale fabrication and wide application of glyco‐assemblies.

https://ift.tt/3tJF4QN

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📰︎ r/ACIE
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📅︎ Feb 10
🚨︎ report
Effect of Hydrophilic Monomer Distribution on Self‐Assembly of a pH‐Responsive Copolymer: Spheres, Worms and Vesicles from a Single Copolymer Composition

Copolymers of acrylic acid (AA) and butyl acrylate (BA) with constant overall composition (1:1 AA:BA) and controlled composition profiles (gradient, asymmetric diblock and asymmetric triblock) show dynamic pH‐responsive self‐assembly behavior, with reversible changes in size and formation of sphere, worm and vesicle morphologies, in contrast to the frozen micelles formed by poly(AA‐block‐BA) block copolymers.

Abstract

A series of copolymers containing 50 mol % acrylic acid (AA) and 50 mol % butyl acrylate (BA) but with differing composition profiles ranging from an AA‐BA diblock copolymer to a linear gradient poly(AA‐grad‐BA) copolymer were synthesized and their pH‐responsive self‐assembly behavior was investigated. While assemblies of the AA‐BA diblock copolymer were kinetically frozen, the gradient‐like compositions underwent reversible changes in size and morphology in response to changes in pH. In particular, a diblock copolymer consisting of two random copolymer segments of equal length (16 mol % and 84 mol % AA content, respectively) formed spherical micelles at pH >5, a mix of spherical and wormlike micelles at pH 5 and vesicles at pH 4. These assemblies were characterized by dynamic light scattering, cryo‐transmission electron microscopy and small angle neutron scattering.

https://ift.tt/3l1ViQd

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📰︎ r/ACIE
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📅︎ Feb 16
🚨︎ report
Monomer controlled switchable copolymerization: A feasible route for the functionalization of poly(lactide)

Switchable polymerization is an attractive strategy to enable the sequential selectivity of multi‐block polyesters. Besides, these well‐defined multi‐block polyesters could enable further modification for wider applications. Herein, based on the reversible insertion of CO 2 by Salen‐Mn III , a new monomer controlled self‐switchable polymerization route was developed. Chemoselective ring opening copolymerization of O ‐carboxyanhydrides (OCAs) and lactide (LA) was explored without cocatalyst. The sequential conversion of OCAs and LA into the polymer chain could form multi‐block polyesters. Based on this strategy, a series of multi‐block polyesters with different pendant groups were synthesized. Furthermore, by modifying the propargyl‐containing copolymers with quaternary ammonium groups, we have realized antibacterial functionalization of PLA. These results imply the potential application of this strategy for the fabrication of functional polymers for biomedical applications.

https://ift.tt/3qhUDNG

👍︎ 2
📰︎ r/ACIE
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📅︎ Feb 13
🚨︎ report

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