Synthesis and Characterization of Hydroxyapatite Using Ammonium Hydroxide and Ethylenediaminetetraacetic Acid

Park, Mi Young; Kim, Youn Jung; Choi, Sang Mun; Oh, Sang‐Ha; Kim, Young Jun; Lim, Woo Taik; An, Jihyun; Choi, Sik Young

doi:10.1002/bkcs.10343

Cited by 9 publications

(4 citation statements)

References 35 publications

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“…The peak at 80 ppm represents the tetrahedral coordination of aluminium in a network type AlO 4 . Assignments for these peaks are well established in the literature [23][24][25]. These results confirm that most of the aluminium occupies an octahedral site and is mostly preserved in the calcined samples.…”

Section: Resultssupporting

confidence: 84%

Phosphoric acid intercalated Mg–Al hydrotalcite-like compounds for catalytic carboxylation reaction of methanol in a continuous system

Ghorbel

Medina

Ghorbel

et al. 2015

Applied Catalysis A: General

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Section: Resultssupporting

confidence: 84%

Phosphoric acid intercalated Mg–Al hydrotalcite-like compounds for catalytic carboxylation reaction of methanol in a continuous system

Ghorbel

Medina

Ghorbel

et al. 2015

Applied Catalysis A: General

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“…( 2). The pKa of 6.44 for chitosan matched previously obtained results [37] (Table 1). The pKa of cat-CH was 6.27 ± 0.01 and was not influenced by χ.…”

Section: Pka Of Cat-chsupporting

confidence: 90%

Injectable, strong and bioadhesive catechol-chitosan hydrogels physically crosslinked using sodium bicarbonate

Guyot

Cerruti

Lerouge

2021

Materials Science and Engineering: C

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“…pK a of this equilibrium 6.5 ± 0.1 (Table 1) is in good agreement with known literature data (Park et al 1983). The number of acid-base centers corresponding to this equilibrium (3.10 ± 0.05 mmol/g) was about 50% of the theoretically calculated one (the molecular weight of the elementary unit of chitosan is 161 g/mol).…”

Section: Potentiometric Titrationsupporting

confidence: 92%

Physico-chemical properties of sunflower oil Pickering emulsions stabilized by cellulose nanocrystals-chitosan complex

Mikhaylov,

Torlopov,

Vaseneva

et al. 2024

Preprint

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In this study we investigated the use of a polyelectrolyte complex formed by cellulose nanocrystals (CNC) and chitosan (Chit) as a stabilizing agent for Pickering emulsions. We demonstrated that chitosan reduces surface charge of CNC, resulting in polyelectrolyte complexes that efficiently stabilize emulsions. Emulsification processes reveal that a slight change in chitosan concentration can recharge surface of CNC. An optimal stabilizing complex containing 1% chitosan gives emulsions with minimal zeta potential, droplet size, creaming index values, along with high stability during storage, change in pH, and application of high centrifugal forces. The study also shows that the maximum neutralized surface charge of the CNC in the CNC-Chit complex allows for effective adsorption on the surface of sunflower oil droplets, producing a denser stabilizing layer with smaller droplet size. Also, chitosan addition is linked to improved stability and higher viscosity, with little dependence on ionic strength and temperature. Potentiometric titration allowed to reveal that five-time less chitosan is needed to neutralize surface charge of acetylated CNC compared to sulfated CNC. It is established that the CNC-Chit ratio eliminates background electrolyte ion participation in neutralizing surface charge, resulting in the absence of characteristic pKa values of the initial components. Wettability on a hydrophilic surface depends on the surface charge of the complex, enhancing wettability and adhesion performance with increased chitosan content. Also, we showed that tuning of stabilizer composition can change bioaccessability of lipophilic compounds during oral administration.

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Synthesis and Characterization of Hydroxyapatite Using Ammonium Hydroxide and Ethylenediaminetetraacetic Acid

Cited by 9 publications

References 35 publications

Phosphoric acid intercalated Mg–Al hydrotalcite-like compounds for catalytic carboxylation reaction of methanol in a continuous system

Phosphoric acid intercalated Mg–Al hydrotalcite-like compounds for catalytic carboxylation reaction of methanol in a continuous system

Injectable, strong and bioadhesive catechol-chitosan hydrogels physically crosslinked using sodium bicarbonate

Physico-chemical properties of sunflower oil Pickering emulsions stabilized by cellulose nanocrystals-chitosan complex

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