Synthesis of hydroxyapatite-sodium alginate via a co-precipitation technique for efficient adsorption of Methylene Blue dye

Guesmi, Youssef; Agougui, Hassen; Lafi, Ridha; Jabli, Mahjoub; Hafiane, Amor

doi:10.1016/j.molliq.2017.11.113

Cited by 124 publications

(41 citation statements)

References 40 publications

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“…The CaOH active site of HAp surface form bonds with the COO – group of alginates. On the other hand, the HPO 4 −2 groups do not interact with the biopolymer, in particular the phosphate-hydroxyl active group [ 58 ]. Still, by gathering information, it can be assured that the alginate is successfully grafted on the hydroxyapatite surface, making the structure of the films ordered at the nanoscale range.…”

Section: Resultsmentioning

confidence: 99%

Soft Actuated Hybrid Hydrogel with Bioinspired Complexity to Control Mechanical Flexure Behavior for Tissue Engineering

2020

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Hydrogels exhibit excellent properties that enable them as nanostructured scaffolds for soft tissue engineering. However, single-component hydrogels have significant limitations due to the low versatility of the single component. To achieve this goal, we have designed and characterized different multi-component hydrogels composed of gelatin, alginate, hydroxyapatite, and a protein (BSA and fibrinogen). First, we describe the surface morphology of the samples and the main characteristics of the physiological interplay by using fourier transform infrared (FT-IR), and confocal Raman microscopy. Then, their degradation and swelling were studied and mechanical properties were determined by rheology measurements. Experimental data were carefully collected and quantitatively analyzed by developing specific approaches and different theoretical models to determining the most important parameters. Finally, we determine how the nanoscale of the system influences its macroscopic properties and characterize the extent to which degree each component maintains its own functionality, demonstrating that with the optimal components, in the right proportion, multifunctional hydrogels can be developed.

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Section: Resultsmentioning

confidence: 99%

Soft Actuated Hybrid Hydrogel with Bioinspired Complexity to Control Mechanical Flexure Behavior for Tissue Engineering

2020

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“…The particular nature of interaction can be determined by the type of species concerned. However, the sorption method is usually classified as physi-sorption where the sorbate bound on the sorbent surface through valence or electrostatic bonding and chemi-sorption where molecule attached through chemical bonding [51][52][53][54].…”

Section: Applications Of Nano-particles As Adsorbentmentioning

confidence: 99%

Preparation of Nano-Particles and Their Applications in Adsorption

Saeed¹,

Akhtar²,

Mahmood³

et al. 2020

Engineered Nanomaterials - Health and Safety

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The nano-technologies and nano-materials draw incredible consideration in recent years. Nano-particles are the particles having size ranging from 1 to 100 nm. The nano-particles are usually categorized into different classes, and their classification is based on size, shape, material production, and dimension. They show superior properties, i.e., enhanced reactivity, high BET surface area, sensitiveness, and steadiness as compared to their bulk materials. In this chapter, different approaches of synthesizing nano-particles, including sol gel, chemical vapor deposition, and biosynthesis are talked over. In the treatment of wastewater, nano-particles offer a possibility for effective adsorption of contaminants organic as well as inorganic. This chapter presents an overview on nano-particles, their types, characteristics, synthetic approaches, and applications in the field of surface chemistry.

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“…Also, researchers like Bariviera (2017) and Nadarajah and Chu (2017) confirmed the inefficiency of bitcoin. Moreover, Guesmi et al (2018) examined the joint dynamics of bitcoin and different financial assets via a multivariate GARCH model. Existing arguments highlight the need for further investigations on this area.…”

Section: Literature Reviewmentioning

confidence: 99%

“…However, in a later study Bouri et al (2017b), the researchers found limited evidence of hedging capability and safe heaven properties for bitcoin. Following their study, Guesmi et al (2018) made evident that bitcoin has some hedging capabilities and diversification benefits against many other safe heaven assets. However, Klein, Thu, and Walther (2017) conclude that bitcoin offers no hedging capabilities like gold which also holds for the brad cryptocurrency index CRIX.…”

Section: Literature Reviewmentioning

confidence: 99%

Bitcoin and Stock Markets: Are They Connected? Evidence from Asean Emerging Economies

Mand

Thaker

2020

Preprint

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Background: Cryptocurrencies, especially Bitcoin, has become popular for investors in recent years. The volatility of bitcoin and time horizon are the center point for investment decisions. However, attention is not often drawn to the relationship between bitcoin and equity indices. This study investigates the volatility and time frequency domain of bitcoin among five Asean countries through a rich database which covers daily data from July 2010 until April 2019.Methods: Advanced econometrics and Wavelets Cross-Coherence Spectrograms, this study investigates the existence of long run association between bitcoin and the studied market indices. M-GARCH analysis is been employed to investigate the unconditional volatility of market indices and Bitcoin.Results: The findings present the long run association with positive (Philippines) and negative (Japan, Korea, Singapore, Hong Kong) relations. Moreover, only one market (KOREA) shows a short run association with bitcoin. The M-GARCH analysis reveals, most of the selected Asean countries have a low unconditional volatility with bitcoin. Except for Philippines in which the co-movement is average, Wavelet analysis reveals the presence of a strong and long co-movements for most of the selected Asean countries with bitcoin.Conclusions: Most of our results are consistent and illustrate different dimensions of long and short run relationship, volatilities, correlations, and time-frequency analysis. This study utilized Asean emerging economies which are rarely available in the literature as existing studies are more skewed towards the West. We believe the outcomes of this study will be a significant for industry practitioners (i.e., retail and institutional investors) on designing better strategies to diversify the stock portfolio with different holding period horizons and dimensions.

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Synthesis of hydroxyapatite-sodium alginate via a co-precipitation technique for efficient adsorption of Methylene Blue dye

Cited by 124 publications

References 40 publications

Soft Actuated Hybrid Hydrogel with Bioinspired Complexity to Control Mechanical Flexure Behavior for Tissue Engineering

Soft Actuated Hybrid Hydrogel with Bioinspired Complexity to Control Mechanical Flexure Behavior for Tissue Engineering

Preparation of Nano-Particles and Their Applications in Adsorption

Bitcoin and Stock Markets: Are They Connected? Evidence from Asean Emerging Economies

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