scholarly journals Effect of Poly(acrylic acid-co-N-vinylpyrrolidone) on Calcium Oxalate Crystallization

1995 ◽  
Vol 27 (4) ◽  
pp. 441-444 ◽  
Author(s):  
George S Georgiev ◽  
Maria D Djarova ◽  
Julia I Petkova ◽  
George I Georgiev ◽  
Nely S Koseva
Keyword(s):  
Acrylic Acid ◽  
Calcium Oxalate ◽  
Calcium Oxalate Crystallization ◽  
Poly Acrylic Acid

scholarly journals Inhibition of calcium oxalate monohydrate by poly(acrylic acid)s with different end groups

2003 ◽  
Vol 91 (3) ◽  
pp. 2035-2041 ◽  
Author(s):  
W. O. S. Doherty ◽  
C. M. Fellows ◽  
S. Gorjian ◽  
E. Senogles ◽  
W. H. Cheung
Keyword(s):  
Acrylic Acid ◽  
Calcium Oxalate ◽  
Calcium Oxalate Monohydrate ◽  
End Groups ◽  
Poly Acrylic Acid

scholarly journals Acidic polyanion poly(acrylic acid) prevents calcium oxalate crystal deposition

2008 ◽  
Vol 74 (7) ◽  
pp. 919-924 ◽  
Author(s):  
Jack G. Kleinman ◽  
Laura J. Alatalo ◽  
Ann M. Beshensky ◽  
Jeffrey A. Wesson
Keyword(s):  
Acrylic Acid ◽  
Calcium Oxalate ◽  
Calcium Oxalate Crystal ◽  
Crystal Deposition ◽  
Poly Acrylic Acid

Effect of poly(acrylic acid) end-group functionality on inhibition of calcium oxalate crystal growth

2009 ◽  
pp. n/a-n/a ◽  
Author(s):  
Andrew D. Wallace ◽  
Ali Al-Hamzah ◽  
Christopher P. East ◽  
William O. S. Doherty ◽  
Christopher M. Fellows
Keyword(s):  
Crystal Growth ◽  
Acrylic Acid ◽  
Calcium Oxalate ◽  
Calcium Oxalate Crystal ◽  
End Group ◽  
Poly Acrylic Acid

scholarly journals Stabilization of Calcium Oxalate Precursors during the Pre- and Post-Nucleation Stages with Poly(acrylic acid)

Nanomaterials ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 235
Author(s):  
Felipe Díaz-Soler ◽  
Carlos Rodriguez-Navarro ◽  
Encarnación Ruiz-Agudo ◽  
Andrónico Neira-Carrillo
Keyword(s):  
Acrylic Acid ◽  
Calcium Oxalate ◽  
Electrostatic Interactions ◽  
Liquid Precursor ◽  
Nucleation Stage ◽  
Carboxylic Acid Groups ◽  
Constant Ph ◽  
Soluble Phase ◽  
Poly Acrylic Acid

In this work, calcium oxalate (CaOx) precursors were stabilized by poly(acrylic acid) (PAA) as an additive under in vitro crystallization assays involving the formation of pre-nucleation clusters of CaOx via a non-classical crystallization (NCC) pathway. The in vitro crystallization of CaOx was carried out in the presence of 10, 50 and 100 mg/L PAA by using automatic calcium potentiometric titration experiments at a constant pH of 6.7 at 20 °C. The results confirmed the successful stabilization of amorphous calcium oxalate II and III (ACOII and ACO III) nanoparticles formed after PNC in the presence of PAA and suggest the participation and stabilization of polymer-induced liquid-precursor (PILP) in the presence of PAA. We demonstrated that PAA stabilizes CaOx precursors with size in the range of 20–400 nm. PAA additive plays a key role in the in vitro crystallization of CaOx stabilizing multi-ion complexes in the pre-nucleation stage, thereby delaying the nucleation of ACO nanoparticles. Indeed, PAA additive favors the formation of more hydrated and soluble phase of ACO nanoparticles that are bound by electrostatic interactions to carboxylic acid groups of PAA during the post-nucleation stage. These findings may help to a better understanding of the pathological mineralization resulting in urolithiasis in mammals.

Effect of poly(acrylic acid) molecular mass and end-group functionality on calcium oxalate crystal morphology and growth

2010 ◽  
Vol 115 (4) ◽  
pp. 2127-2135 ◽  
Author(s):  
Christopher P. East ◽  
Andrew D. Wallace ◽  
Ali Al-Hamzah ◽  
William O. S. Doherty ◽  
Christopher M. Fellows
Keyword(s):  
Acrylic Acid ◽  
Calcium Oxalate ◽  
Molecular Mass ◽  
Crystal Morphology ◽  
Calcium Oxalate Crystal ◽  
End Group ◽  
Poly Acrylic Acid

Soft ionic liquid based resistive memory characteristics in a two terminal discrete polydimethylsiloxane cylindrical microchannel

2020 ◽  
Vol 8 (38) ◽  
pp. 13368-13374
Author(s):  
Muhammad Umair Khan ◽  
Gul Hassan ◽  
Jinho Bae
Keyword(s):  
Ionic Liquid ◽  
Acrylic Acid ◽  
Sodium Hydroxide ◽  
Sodium Salt ◽  
Resistive Memory ◽  
Cylindrical Microchannel ◽  
Memory Characteristics ◽  
Poly Acrylic Acid

This paper proposes a novel soft ionic liquid (IL) electrically functional device that displays resistive memory characteristics using poly(acrylic acid) partial sodium salt (PAA-Na+:H2O) solution gel and sodium hydroxide (NaOH) in a thin polydimethylsiloxane (PDMS) cylindrical microchannel.

Reactions of macroions with ester and carboxylic groups of polymers

1987 ◽  
Vol 52 (9) ◽  
pp. 2194-2203
Author(s):  
Miloslav Kučera ◽  
Dušan Kimmer ◽  
Karla Majerová ◽  
Josef Majer
Keyword(s):  
Maleic Anhydride ◽  
Acrylic Acid ◽  
Methyl Methacrylate ◽  
Bond Formation ◽  
Covalent Bond ◽  
The Other ◽  
Poly Methyl Methacrylate ◽  
Other Hand ◽  
Carboxylic Groups ◽  
Poly Acrylic Acid

In the reaction of dianions with poly(methyl methacrylate), only an insignificant amount of insoluble crosslinked product is obtained. If, however, the concentration of grafting dianions approaches that of ester groups, the amount of poly(methyl methacrylate) which may thus be crosslinked becomes quite significant. Dications, too, can bring about crosslinking of only an insignificant number of poly(methyl methacrylate) chains. Carboxylic groups in poly(acrylic acid) react with dianions and dications in an anhydrous medium similarly to ester groups. On the other hand, in the presence of a cocatalytic amount of water dications are more readily bound to carboxylic groups, forming a covalent bond. The relatively highest efficiency was observed in the bond formation between dication and the poly[styrene-alt-(maleic anhydride)], both in an anhydrous medium and in the presence of H2O.

Fabrication and Characterization of Chitosan-Poly(acrylic acid) Magnetic Nanospheres

2009 ◽  
Vol 9 (2) ◽  
pp. 1287-1290 ◽  
Author(s):  
Yuqing Ge ◽  
Song Zhang ◽  
Shiying He ◽  
Yu Zhang ◽  
Ning Gu
Keyword(s):  
Acrylic Acid ◽  
Magnetic Nanospheres ◽  
Fabrication And Characterization ◽  
Poly Acrylic Acid

Synthesis, characterization, and their some chemical and biological properties of PVA/PAA/nPS hydrogel nanocomposites: Hydrogel and wound dressing

2020 ◽  
Vol 35 (3) ◽  
pp. 203-215
Author(s):  
Mehmet Emin Diken ◽  
Berna Koçer Kizilduman ◽  
Begümhan Yilmaz Kardaş ◽  
Enes Emre Doğan ◽  
Mehmet Doğan ◽  
...  
Keyword(s):  
Fourier Transform ◽  
Acrylic Acid ◽  
Infrared Spectra ◽  
Vinyl Alcohol ◽  
Fourier Transform Infrared ◽  
Poly Vinyl Alcohol ◽  
Seed Particles ◽  
Fourier Transform Infrared Spectra ◽  
Hydrogel Nanocomposites ◽  
Poly Acrylic Acid

The nanocomposite hydrogels were prepared by dispersing of the nanopomegranate seed particles into poly(vinyl alcohol)/poly(acrylic acid) blend matrix in an aqueous medium by the solvent casting method. These hydrogels were characterized using scanning electron microscopy, Fourier transform infrared spectra, differential scanning calorimetry, and optical contact angle instruments. The nanopomegranate seed, blend, and hydrogel nanocomposites were tested for microbial activity. In addition, cytocompatibilities of these blend and hydrogel nanocomposites/composites were tested on human lymphocyte with in vitro MTS cell viability assays. Fourier transform infrared spectra revealed that esterification reaction took place among functional groups in the structure of poly(vinyl alcohol) and poly(acrylic acid). The hydrophilic properties of all hydrogels decreased with increasing nanopomegranate seed content. The mean diameters of the nanopomegranate seed particles were about 88 nm. Nanopomegranate seed particles demonstrated antibacterial properties against gram-positive bacteria, Staphylococcus aureus, and gram-negative bacteria, Escherichia coli. The lymphocyte viabilities increased after addition of nanopomegranate seeds into the polymer blend. The swelling behavior of blend and hydrogels was dependent on the cross-linking density created by the reaction between poly(vinyl alcohol)/poly(acrylic acid) blend and nanopomegranate seed. Scanning electron microscopy images were highly consistent with Fourier transform infrared spectra, differential scanning calorimetry, and antibacterial activity results.

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