Vanadium(V)/mandelic acid initiated graft copolymerization of acrylamide onto guar gum in an aqueous medium

Srivastava, Arti; Mishra, Vivek; Singh, Shailendra Kumar; Kumar, Rajesh

doi:10.1002/app.31172

Cited by 19 publications

(7 citation statements)

References 25 publications

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“…The degree of swelling at time t ( Q t ) was estimated in grams of water per gram of dry hydrogel with the following equation:

Q_{t} = \frac{m_{t} - m_{0}}{m_{0}}

where m 0 is the initial weight of the dried disc, namely, the weight at t = 0; m t is the weight after time t; and Q t is the weight of water intake at time t . The equilibrium swelling ( Q ∞ ) was calculated with the following formula:

Q_{\infty} = \frac{m_{t} - m_{0}}{m_{0}}

…”

Section: Methodsmentioning

confidence: 99%

Oxaliplatin‐loaded crosslinked polymeric network of chondroitin sulfate‐co‐poly(methacrylic acid) for colorectal cancer: Its toxicological evaluation

Barkat

Ahmad

Minhas

et al. 2017

J of Applied Polymer Sci

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The purpose of this study was to develop and characterize chemically crosslinked chondroitin sulfate-co-poly(methacrylic acid) (CSMA) hydrogels for colon targeting of oxaliplatin (OXP) to treat colorectal cancer. CSMA hydrogels were synthesized by freeradical polymerization. Chondroitin sulfate was chemically crosslinked with methacrylic acid in an aqueous medium. Ammonium peroxodisulfate and N,N-methylene bisacrylamide were used as the initiator and crosslinker, respectively. Fourier transform infrared spectroscopy, thermogravimetric analysis, differential scanning calorimetry, X-ray diffraction, and scanning electron microscopy studies were performed to characterize the fabricated polymeric system. The pH-sensitive characteristics of the hydrogels were evaluated by swelling dynamics and equilibrium swelling ratio measurements at pH 1.2 and 7.4. A toxicity study of the developed formulations was also conducted on rabbits to determine the toxicity of the drug-carrier system to the biological system. The characterization studies confirmed the formation of a new polymeric network. A high OXP loading and higher drug release was observed at pH 7.4. The toxicity study confirmed that the developed formulations were nontoxic to the biological system.

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“…The degree of swelling at time t ( Q t ) was estimated in grams of water per gram of dry hydrogel with the following equation:

Q_{t} = \frac{m_{t} - m_{0}}{m_{0}}

Q_{\infty} = \frac{m_{t} - m_{0}}{m_{0}}

…”

Section: Methodsmentioning

confidence: 99%

Oxaliplatin‐loaded crosslinked polymeric network of chondroitin sulfate‐co‐poly(methacrylic acid) for colorectal cancer: Its toxicological evaluation

Barkat

Ahmad

Minhas

et al. 2017

J of Applied Polymer Sci

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“…Linear polymers are known to have a higher viscosity as compared with their branched counterparts with the same molecular weight. The reason for this is that linear polymers have a higher hydrodynamic volume in solution; the longer the chain, higher the intrinsic viscosity and vice versa 49. It is also known that [η] depends on some key parameters including temperature15 and solvent interactions 50, 51.…”

Section: Resultsmentioning

confidence: 99%

Increasing pneumococcal vaccination for immunosuppressed patients: A cluster quality improvement trial

Desai¹,

Lü²,

Szent-Gyorgyi³

et al. 2012

Arthritis & Rheumatism

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Objective. Pneumococcal vaccination is important for patients taking immunosuppressive medications, but prior studies suggest that most patients do not undergo vaccination. The aim of this study was to evaluate the effects of a point-of-care paper reminder form as a quality improvement (QI) strategy to increase the numbers of immunosuppressed patients being kept up-to-date with pneumococcal vaccination in a rheumatology practice.Methods. Selected rheumatologists at 5 ambulatory practice sites received a point-of-care paper reminder form to be applied to patients who were not up-to-date with pneumococcal vaccination. Interrupted time-series analyses were used to measure the effect of the intervention on the pneumococcal vaccination rates among patients, comparing the rates in the intervention group with those in a control group of rheumatologists who did not receive the intervention. Adjusted Cox proportional hazards models were examined to identify independent predictors of being up-to-date with pneumococcal vaccination.Results. We evaluated a total of 3,717 patients (66.0% with rheumatoid arthritis) who were taking immunosuppressive medications (74.1% women, mean age 53.7 years). Rheumatologists who received the intervention had a significant increase in the rate of patients who were up-to-date with pneumococcal vaccination, from 67.6% to 80.0% (P ‫؍‬ 0.006), in the time period following the intervention, compared to a rate that remained stable, from 52.3% to 52.0% (P ‫؍‬ 0.90), among patients in the nonintervention control group during this same time period. In regression models, positive predictors of being up-to-date with pneumococcal vaccination at the patient level included the following: having received the intervention (hazard ratio Conclusion. A QI strategy involving a simple point-of-care paper reminder form significantly increased the rate of being up-to-date with pneumococcal vaccination among patients receiving immunosuppressive medications in our rheumatology practices over a 6-month period.[

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“…The graft degree on the modified membrane surfaces was calculated through the grafting yield (GD, %), based on the difference in the dried membrane weights before and after surface grafting, over the membrane surface area.

GD = true{true[true(m_{1} - m_{o} true) / m_{o} true] \times 100 true} true(% true)

where m o and m 1 are the weights of the dried membrane sample before and after grafting, respectively.…”

Section: Methodsmentioning

confidence: 99%

Surface modification of polyamide TFC membranes via redox‐initiated graft polymerization of acrylic acid

Ngo

Dinh

Tran

2017

J of Applied Polymer Sci

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In this work, the redox‐initiated graft polymerization of acrylic acid (AA) onto the surface of polyamide thin film composite membranes has been carried out to enhance membrane separation and antifouling properties. The membrane surface characteristics were determined through the attenuated total reflection Fourier transform infrared spectra, scanning electron microscopy, atomic force microscopy, and water contact angles. The membrane separation performance was evaluated through membrane flux and rejection of some organic compounds such as reactive red dye (RR261), humic acid, and bovine serum albumin in aqueous feed solutions. The experimental results indicated that the membrane surfaces became more hydrophilic and smoother after grafting of AA. The modified membranes have a better separation performance with a significant enhancement of flux at a great retention. The fouling resistance of the modified membranes is also clearly improved with the higher maintained flux ratio and the lower irreversible fouling factor compared to the unmodified one. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017, 134, 45110.

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Vanadium(V)/mandelic acid initiated graft copolymerization of acrylamide onto guar gum in an aqueous medium

Cited by 19 publications

References 25 publications

Oxaliplatin‐loaded crosslinked polymeric network of chondroitin sulfate‐co‐poly(methacrylic acid) for colorectal cancer: Its toxicological evaluation

Oxaliplatin‐loaded crosslinked polymeric network of chondroitin sulfate‐co‐poly(methacrylic acid) for colorectal cancer: Its toxicological evaluation

Increasing pneumococcal vaccination for immunosuppressed patients: A cluster quality improvement trial

Surface modification of polyamide TFC membranes via redox‐initiated graft polymerization of acrylic acid

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