Production Bionanocomposite Films of Bitter Vetch Protein Isolate Contain Zno Nanoparticles and Study Functional Characterizations and Its Effect on Food Storage (original) (raw)

Performance of Iron-Zero (nZVI) Nanno Particles in Removal of Cephalexin from Synthetic Wastewater

2013

of antibiotic in wastewater causes wastewater treatment more difficult. The amount of antibiotic consumption, especially Cephalexin, is considerable so that it concentration in pharmaceutical wastewater is usually high. This study attempts to determine the efficiency removal of Cephalexin by iron nanoparticles from synthetic wastewater. Moreover, the effect of operating parameters such as initial concentrations of Cephalexin, pH, amount of iron nanoparticles and detention time on removal efficiency are investigated and the optimum operating range for each of these operating variables is experimentally determined. The preparation of iron nanoparticles were carried out daily. Samples were prepared with different concentration from a stock solution with 100 mg/L Cephalexin concentration. Cephalexin concentration in each experiment was determined by HPLC method. The results showed that the removal efficiency of Cephalexin in the optimal condition (initial Cephalexin concentration, of 10...

Fabrication and characterization of gelatin-based biocompatible porous composite scaffold for bone tissue engineering

Journal of Biomedical Materials Research Part A, 2012

Gelatin is a protein which is derived from the organic constituent of bone (collagen). Combination of this protein with the inorganic constituent of bone (hydroxyapatite) may provide closer properties to the natural bone. In this study, a biodegradable composite scaffold based on gelatin and hydroxyapatite was prepared as a substitute for bone tissue. To increase the biocompatibility of this composite, its fabrication was carried out without using any organic solvent. Porosities obtained were spontaneously achieved without any porogen. The pore morphology indicated a high interconnectivity with diameters ranging from 50 to 200 micrometers, which seems appropriate for bone tissue engineering applications. In order to study the biocompatibility of the scaffolds, mouse fibroblastic cells were used. After 24-hour cell culture period in vitro, suitable cell attachment was observed showing high biocompatibility for all the samples. Further examinations demonstrated that the best biocompatibility is obtained for the composite of 50 wt% hydroxyapatite and 50 wt% gelatin.

Effect of Zinc Oxide Addition on Antibacterial Behavior of Hydroxyapatite-Poly lactic-co-glycolic acid Scaffold for Bone Tissue Engineering Applications

Biological Journal of Microorganism, 2018

Introduction: Infection after the surgery is one of the problems of bone scaffolds implants which is normally treated by systemic administration of antibiotics. But due to the poor blood circulation in bone tissue, large antibiotic doses are needed which lead to further drawbacks to renal and hepatic systems. Material and method: In this study, the effect of zinc oxide addition on antibacterial behavior of hydroxyapatite- Poly lactic-co-glycolic acid scaffold was evaluated. The synthesized composite was characterized by X-ray diffraction, scanning electron microscopy equipped with elemental analysis and Fourier transform infrared spectra. In order to determine the antibacterial activity of the fabricated scaffold, Staphylococcus aureus (ATTC 25922) and Escherichia coli (ATTC 25923) were used as test microorganisms. Results: The results showed that Hydroxyapatite- Poly lactic-co-glycolic acid scaffold did not make inhibition zone in culture medium but the modification of Hydroxyapati...

Green Nano Architecture: A New Prospects and Future Visions

Journal of Al-Azhar University Engineering Sector

The research study the concept of Nano technology and how integrate it with green practices which begins with the application of the principles green chemistry during the design and manufacture of Nano material to have got green Nano material which it has ability achieve architectural sustainability Adapts to the technological data of this era, and the integration of green Nano material with architecture has led us to green Nano architecture which inspire of solutions and innovative ideas to support architectural sustainability form design to structure. The research also studies many of the factors that represent application of Green nanotechnology (such as construction materials and management its resources for sustainability-energy and sustainability and the use of green and renewable energy-the efficiency of water consumption and Waste Management Waste Management). And how green Nano architecture be a participant in solution a number of environmental issues such as energy consumption, emissions of carbon dioxide, And Recycling of Nano-waste in a sustainable manner.

Migration of di (2-ethylhexyl) adipate plasticizer from PET bottles into acidic food simulant: determination of diffusion coefficients and activation energy of diffusion

Iranian Journal of Nutrition Sciences and Food Technology, 2013

Background and Objective: The migration of packaging material constituents into food is a product of the interaction between the food and packaging material. This phenomenon is of importance because some migrating substances may be toxicologically carcinogenic and endanger consumer safety. Materials and Methods: Gas chromatography was used to determine the migration of di (2-ethylhexyl) adipate (DEHA) into food simulant. Differential scanning calorimetry (DSC) was used to evaluate the effect of an acidic solution on PET structure. The diffusion coefficient of the DEHA plasticizer into the PET bottles was calculated using the Piringer model and the activation energy of diffusion at 45°C was estimated using the Arrhenius relation. Results: It was observed that the migration of DEHA increased over time and temperature. An increase in storage temperature from 25°C to 45°C considerably increased the diffusion coefficient of the migrant in PET. DSC results showed that the glass transition temperature (T g) of the polymer at a given temperature does not change over time, indicating no change in the polymer structure from contact with the acid solution. Conclusions: The amount of DEHA migration into the acidic food simulant was below the standard limit set by the European Commission for secure PET packaging used for yogurt drinks.

Effect of Deposition Temperature on the Physical Performance of n-ZnO/p-Si Heterojunction

JOURNAL OF EDUCATION AND SCIENCE

Comparative study of the physical characteristics of n-ZnO/p-Si heterojunction diode has been done as a function of deposition temperature in the range of 300-600 °C. Transparent conducting (TC) Zinc Oxide (ZnO) thin films were deposited by atmospheric pressure chemical vapor deposition (APCVD) technique on the p-Si(100) and glass substrates. Also, the influences of different deposition temperature on the morphology and optical properties of ZnO films were studied. Both the average surface roughness (from 62.8 to 18.8 nm) and the root mean square (from 78.2 to 24 nm) of ZnO films were decreased with the increase in the deposition temperature. Optical transmittance measurement results exhibited good transparency within the visible wavelength range for the films prepared at a temperature above 400 C. The current-voltage (I-V) characteristics of the heterojunction diodes exhibited rectification behavior and depend on the deposition temperature. The electrical parameters of the n-ZnO/p-Si heterojunctions were also affected by the deposition temperature. The diodes prepared at a temperature above 400 C were possessed lower reverse saturation current and high rectification ratio compared to those fabricated at a relatively lower temperature such as 300 C or 400 °C. Such low a temperature grown n-ZnO/p-Si heterojunction diodes with lower reverse saturation current could be suitable for photo-detection applications.

The effect of carboxymethyl cellulose substitution with Persian gum on the qualitative properties of mayonnaise

Pizhūhish va Nuāvarī dar ̒Ulūm va Sanāyi̒-i Ghaz̠āyī, 2014

Gums are compounds that increase stability of mayonnaise by increasing the viscosity of the continuous phase. In this study, the Persian gum with carboxymethyl cellulose (CMC), at combination of levels 0:100, 25:75, 50:50, 75:25 and 100:0, were used to produce treatments. Experimental data's of color measuring showed that by increasing Persian gum level in samples, lightness (L*) and yellowness (b*) factors were decreased and increased, respectively. The samples included 100% Persian gum (1.5%w/w), and 75% Persian gum-25% CMC showed non-significant difference comparing to the sample contained 100% CMC (2%w/w). Sample with 75% Persian gum-25% CMC had highest hardness, cohesiveness and adhesiveness that had no significant difference compared with other samples. Rheological tests also showed that all samples had pseudo-plastic behavior at shear rates of 1-450 s<sup>-1</sup> and weak gel-like behavior at frequency range of 0.1-10 Hz. Results showed that Persian gum has s...

Integrating of Nano Architecture and Sustainability Towards a Better Built Environment

Journal of Al-Azhar University Engineering Sector

The research study mechanism of achieving sustainable design and its principles which are (Economy of Resources-Sustainable Life Cycle for Buildings-Humane Design) And taking advantage of the latest technological tools such as nanotechnology to achieve the sustainability of the 21st century. The research also dealt with the applications of nanotechnology at architecture which crystallized by the full integration of architectural thought, its reflected on the methods of architecture design, in addition to the integration with all construction and non-construction materials, as a result of that we have got a new materials more solid, tough compared to conventional materials, as well as the role of nanotechnology at thriftiness Energy and its production. The integration of nanotechnology with building materials has given us an opportunity to achieve comprehensive sustainability. Several trends have emerged supporting the use of Nano material for promote sustainability, such as biological architecture, ecological architecture and intelligent nanostructures. These trends represent a perfect harmony between sustainable design and nanotechnology; Which promises promising future prospects for the construction industry to acquire the sustainability of buildings for a better built environment.