Synthesis and Characterization of Poly[bis(ethyl salicylate)phosphazenes] and Poly[bis(ethyl salicylate diethylamino)phosphazenes] and Their Hydrolytic Degradation

Amin, Abid M.; Wang, Li; Yu, Haipeng; Amer, Wael A.; Gao, Jianhong; Tai, Yulei; Zhang, Lei

doi:10.1007/s10904-011-9529-z

Cited by 12 publications

(4 citation statements)

References 56 publications

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“…Polyphosphazenes have gained lots of attention in biological applications due to their unique properties [1][2][3][4][5][6][7]. The backbone of this polymer contains alternating Nitrogen and Phosphorous atoms which have two pendant groups on each phosphorous atom.…”

Section: Introductionmentioning

confidence: 99%

“…make the polymer chain susceptible to hydrolysis [8][9][10][11] and useful for biomedical applications such as tissue engineering, drug delivery, short term implants etc. [1][2][3]. The degradation mechanism of polyphosphazene has not been fully understood but the current scheme is result of various experimental studies [4,5].…”

Section: Introductionmentioning

confidence: 99%

“…During the hydrolysis, water molecules attack on side groups replacing it with the hydroxyl group. Hydroxyl group poses electron withdrawing effect on the chain and resultantly chain tautomerizes facilitating the degradation finally splitting into the end products such as ammonia, phosphate, phosphoric acid and conjugate acid of side group [1][2][3][4][5].…”

Section: Introductionmentioning

confidence: 99%

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Mathematical Modeling of Polyphosphazenes

Abid

Hussain²,

Qureshi

et al. 2021

Acta Chemica Malaysia

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Polyphosphazenes was synthesized and their self assembly behavior was observed as reported in our previous work [1–5]. A number of experiments were carried out to study the polymerization behavior at various conditions of the polymerization time and temperature. The experimental data were analyzed by graphical and statistical methods and it was found that the polymerization phenomena was controlled by the synthesis time, i.e. Mw=Moeksts, where Mw is molecular weight of the polymer at time ts, Mo (=203. 24) is pre-exponential factor in the model and ks(=1.0686) is synthesis rate constant for the polymer.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Mathematical Modeling of Polyphosphazenes

Abid

Hussain²,

Qureshi

et al. 2021

Acta Chemica Malaysia

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“…Although ESA can be mixed with ethanol and ether, it is not a material synthesized naturally in plant and that can be synthesized chemically by reaction with ethanol. Poly [bis (ethyl salicylate) phosphazenes] and poly [bis (ethyl salicylate diethylamino) phosphazenes] synthesized from ESA are not only applied -Noteto biocompatibility, soft tissue artificial organ, chemical therapy model and drug delivery system in biomedical area, but also classified into degradable material due to their characteristics [1,2].…”

Section: Introductionmentioning

confidence: 99%

Effects of Ethylsalicylic Acid on Growth and Rubisco/Rubisco Activase in Tobacco Plant Cultured under Cadmium Treatment in vitro

Roh

Cui²

2014

Journal of Life Science

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Growth induced by cadmium (Cd) and ethylsalicylic acid (ESA) and the effect of ESA on rubisco/rubisco activase were studied in tobacco. The effect of denaturants on rubisco/rubisco activase was also investigated. In order to determine optimal concentration of ESA for growth of tobacco, tobacco was treated with 10 -6 -10 mM. It was found that its growth was the highest at 10 -4 mM ESA. In the experiment using control, Cd treated group, ESA treated group, and Cd and ESA mixture group, ESA alone showed the highest growth and Cd showed the lowest growth. Cd treated group was the lowest in both rubisco/rubisco activase content and activity. ESA reduced the rubisco/rubisco activase content, but increased their activity. The activity of rubisco was inhibited by treating L-cysteine, urea, thiourea, β-mercaptoethanol, and EDTA other than guanidine-HCl in control group. L-cysteine, urea, thiourea, and guanidine-HCl treatments showed no change, but β-mercaptoethanol and EDTA increased rubisco activase activity. In conclusion, ESA inhibited the content of rubisco and promoted its activity, whereas promoted the content of rubisco activase and inhibited its activity. In addition, the content and activity of rubisco and rubisco activase inhibited by Cd were recovered by ESA. The activity of rubisco and rubisco activase by Cd and ESA was inhibited by the denaturant and the recovery of ESA inhibited by Cd was lost by the denaturant.

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