scholarly journals Calcium Hydroxyapatite-Based Marine Origin: Novel Sunscreen Materials for Cosmeceutical Treatments

2018 ◽  
Vol 34 (6) ◽  
pp. 2770-2776
Author(s):  
Mohd Zul Helmi Rozaini ◽  
Habibah Hamzah ◽  
Chia Poh Wai ◽  
Mohd Hasmizam Razali ◽  
Uwaisulqarni M. Osman ◽  
...  
Keyword(s):  
Uv Light ◽  
Low Cost ◽  
Value Added ◽  
Dry Weight ◽  
Calcium Hydroxyapatite ◽  
The Novel ◽  
X Ray Diffraction ◽  
Light Absorber ◽  
Mn Doped ◽  
Value Added Products

Fringescalesardinella or TambanSisik bones have been discovered can be utilized as sunscreen agent in cosmeceuticals. Its flesh is the main ingredient in keropoklekor or fish crackers in Malaysia and the bones contained very high hydroxyapatite (HAp), (Ca10(PO4)6(OH)2) compound which exhibit as UV light absorber. The percentage yields obtained from the hydrothermal extraction consist of 41.2 ± 0.66 % (w/w) of HApwhich was almost half of the dry weight of 100 g samples.The additional of manganeseand ferum,initiated the novel sunscreen materials from hydroxyapatite-Fe and hydroxyapatite-Mn doped (modified bones). The unmodified HAp recorded with SPF 20 and modified HAp-Mn measured with SPF 40. Modified HAp-Fe emulsions were recorded with SPF 50 as the highest SPF value. Therefore, the bones have been characterized using Fourier Transform Infrared Radiation (FTIR)spectroscopy and x-Ray diffraction (XRD).The results obtained clearly indicated that the HAp existence in waste of Fringescalesardinella bones with addition of FeCl2which exhibits high potential as sunscreen compared to manganese and unmodified bones. Thus, the utilization of waste from the fish bones not only produce value-added products from low-cost resources, but also help in reducing pollution to the environment and preserved the global sustainability.

Core–Shell Chain-Like Cu@Ni Composite with Dual Absorption Peaks to Improve Microwave Absorption Properties

NANO ◽  
2018 ◽  
Vol 13 (05) ◽  
pp. 1850052
Author(s):  
Yuanyuan Zhou ◽  
Jianying Deng ◽  
Shimei Li ◽  
Zefeng Li
Keyword(s):  
Hydrothermal Reaction ◽  
Low Cost ◽  
Electromagnetic Properties ◽  
Formation Mechanisms ◽  
Core Shell ◽  
The Novel ◽  
Redox Potentials ◽  
X Ray Diffraction ◽  
Ni Alloy ◽  
Absorbing Material

Core–shell Cu@Ni chains were successfully synthesized through a mild hydrothermal reaction. The morphology, structure and microwave electromagnetic properties of the composite were then characterized by X-ray diffraction, energy-dispersive spectroscopy, scanning electron microscopy and vector network analysis. The formation mechanisms of the core–shell structure and one-dimensional chains were ascribed to the varying redox potentials of Cu and Ni ions and the magnetic dipole–dipole attraction. Furthermore, a minimal reflection loss (RL) of [Formula: see text]20.7[Formula: see text]dB was observed at 9.6[Formula: see text]GHz with a thickness of 2.0[Formula: see text]mm and the effective absorption ([Formula: see text]10[Formula: see text]dB, 90% microwave attenuation) bandwidth can be adjusted between 5.2[Formula: see text]GHz and 16.6[Formula: see text]GHz for the thin absorber thickness of 2.0–4.0[Formula: see text]mm. The novel core–shell chain-like Cu@Ni alloy can be used as a promising absorbing material because it shows numerous features such as thin thickness, strong absorption, low cost and lightweight.

scholarly journals Unravelling the Environmental Application of Biochar as Low-Cost Biosorbent: A Review

2020 ◽  
Vol 10 (21) ◽  
pp. 7810 ◽  
Author(s):  
Antía Fdez-Sanromán ◽  
Marta Pazos ◽  
Emilio Rosales ◽  
María Angeles Sanromán
Keyword(s):  
Low Cost ◽  
Value Added ◽  
Physicochemical Characteristics ◽  
The Novel ◽  
Key Factors ◽  
Biomass Waste ◽  
Environmental Application ◽  
Adsorption Mechanisms ◽  
Points Of Interest ◽  
Interesting Approach

In this age, a key target for enhancing the competitiveness of the chemical, environmental and biotechnology industries is to manufacture high-value products more efficiently and especially with significantly reduced environmental impact. Under this premise, the conversion of biomass waste to a high-value added product, biochar, is an interesting approach under the circular economy principles. Thus, the improvements in the biochar production and its new and innovative uses are hot points of interest, which are the focus of vast efforts of the scientific community. Biochar has been recognized as a material of great potential, and its use as an adsorbent is becoming a reliable strategy for the removal of pollutants of different streams, according to its high adsorption capacity and potential to eliminate recalcitrant compounds. In this review, a succinct overview of current actions developed to improve the adsorption capability of biochar, mainly of heavy metal and organic pollutants (dyes, pharmaceuticals and personal care products), is summarized and discussed, and the principal adsorption mechanisms are described. The feedstock and the production procedure are revealed as key factors that provide the appropriate physicochemical characteristics for the good performance of biochar as an adsorbent. In addition, the modification of the biochar by the different described approaches proved their feasibility and became a good strategy for the design of selective adsorbents. In the last part of this review, the novel prospects in the regeneration of the biochar are presented in order to achieve a clean technology for alleviating the water pollution challenge.

scholarly journals Preparation of ternary ZnO/Ag/cellulose and its enhanced photocatalytic degradation property on phenol and benzene in VOCs

2019 ◽  
Vol 17 (1) ◽  
pp. 779-787 ◽  
Author(s):  
Xiao-Hang Zou ◽  
Si-Wei Zhao ◽  
Ji-Guo Zhang ◽  
Hui-Liang Sun ◽  
Qing-Jiang Pan ◽  
...  
Keyword(s):  
Photocatalytic Degradation ◽  
Separation Efficiency ◽  
Uv Light ◽  
Low Cost ◽  
Visible Region ◽  
X Ray Diffraction ◽  
Ternary Composite ◽  
Photogenerated Electrons ◽  
Excellent Photocatalytic Activity ◽  
Diffraction Patterns

AbstractThe ZnO/Ag/cellulose composite (ZAC) with excellent photocatalytic activity of degrading benzene and phenol in VOCs has been successfully synthesized. EDS, TEM, XPS and UV-vis analyses show that the ZAC is a ternary composite. It is composed of Ag, ZnO and cellulose, where the cellulose works as the substrate to anchor the other two components. The X-ray diffraction patterns find well-crystallized ZnO nanoparticles. Multiple PL peaks in the visible region measured for ZAC, imply rich defects on ZnO. It is observed that Ag nanoparticles are mainly attached on ZnO in the composite, which would raise the separation efficiency of photogenerated electrons and holes. Photocatalytic degradation shows that ZAC is able to decompose almost 100% phenol and 19% benzene in VOCs under UV light irradiation (6 W) which is almost no harm to human body. Due to the renewable cellulose, our ternary composite ZAC imparts low-cost, easily recycled and flexible merits, which might be applied in the indoor VOCs treatment.

scholarly journals Synthesis and Characterization of Hierarchical Porousα-FeOOH for the Adsorption and Photodegradation of Rhodamine B

2014 ◽  
Vol 2014 ◽  
pp. 1-8 ◽  
Author(s):  
Jianliang Cao ◽  
Gaojie Li ◽  
Yan Wang ◽  
Guang Sun ◽  
Hari Bala ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Rhodamine B ◽  
Uv Light ◽  
Low Cost ◽  
High Surface ◽  
High Surface Area ◽  
X Ray Diffraction ◽  
Transmission Electron ◽  
Hierarchical Porous ◽  
Templated Method

Hierarchical porousα-FeOOH nanoparticles were controlled and prepared via a facile polystyrene (PS) microspheres-templated method. Theα-Fe2O3was obtained by the calcination of the as-preparedα-FeOOH. The resulting nanoparticles were characterized by X-ray diffraction analysis (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and N2-sorption techniques. The adsorption and photodegradation of Rhodamine B performance were evaluated under UV light at room temperature. The results indicated that the photocatalytic activity of theα-FeOOH nanoparticles is superior toα-Fe2O3-200 andα-Fe2O3-300 due to the hierarchically multiporous structure and high surface area. This convenient and low-cost process provides a rational synthesis alternative for the preparation of multiporous materials and the as-synthesis products have great foreground applications in many aspects.

scholarly journals Ultrasound Assisted Pretreatments Applied to Cupuaçu Husk (Theobroma grandiflorum) from Brazilian Legal Amazon for Biorefinery Concept

2022 ◽  
Author(s):  
Nicole Marasca ◽  
Isabella Cardoso ◽  
Magale Rambo ◽  
Daniel Bertuol ◽  
Michele Rambo ◽  
...  
Keyword(s):  
Native Species ◽  
Liquid Fraction ◽  
Value Added ◽  
X Ray Diffraction ◽  
X Ray ◽  
Aqueous Acid ◽  
Ultrasound Assisted ◽  
Hydrolysis Of ◽  
Pretreated Biomass ◽  
Value Added Products

Cupuaçu husk (CH) is the waste of a common fruit from a native species of the Brazilian Legal Amazon. The current study investigated the influence of ultrasound (US) combined with aqueous, acid, alkaline, and ionic liquid (IL) pretreatments on the chemical and physical aspects of CH and the yield of chemical platforms production, 5-hydroxymethylfurfural (HMF) and furfural (FF), using IL. Scanning electron microscopy, X-ray diffraction (XRD) and Fourier transform infrared spectroscopy were used to feature the raw and pretreated biomass. The highest levels of glucose (9.90 g L-1) were observed in the liquid fraction resulting from the acid + US pretreatment followed by acid hydrolysis. The IL + US pretreatment recorded the best performance in removing lignin. Based on XRD analyses, ultrasound increased crystallinity of all pretreated samples as a result of the removal of cellulose’s amorphous fraction. However, it promoted accessibility to adopted reagents by increasing biomass exposure due to cavitation. The best yields of HMF and FF were recorded from hydrolysis of the solid fraction resulting from the acid + US (12.94%) and alkaline + US (48.84%) pretreatment, respectively. These results indicate satisfactory performance of ultrasound assisted pretreatments to the simplified and economic conversion of biomass into value-added products.

scholarly journals Production of Bacterial Cellulose by Acetobacter tropicalis Isolated from Decaying Apple Waste

2022 ◽  
Vol 34 (2) ◽  
pp. 453-458
Author(s):  
Lakhvinder Kaur ◽  
Shachi Shah
Keyword(s):  
Bacterial Cellulose ◽  
Organic Waste ◽  
Fruits And Vegetables ◽  
Low Cost ◽  
Value Added ◽  
Bacterial Isolates ◽  
Research Areas ◽  
Wide Range ◽  
Potential Alternative ◽  
Value Added Products

Fruits and vegetables have the highest wastage rates of 45% of any food. One of the recent research areas is food waste valorization as a potential alternative to the disposal of a wide range of organic waste using microorganisms as one of the strategies known as microbial valorization. Bacterial cellulose is best known microbial valorization product because of its low cost, environmentally friendly nature, renewability, nanoscale dimensions, biocompatibility and extremely high hydrophilicity. Therefore, present study focuses on the isolation, characterization and identification of cellulose producing bacteria from decaying apple waste. Cellulose producers were isolated from decaying apple waste. The bacterial isolates obtained were identified through the morphological biochemical, physiological and molecular identification. The bacterial isolates exhibited potential remediation options to biovalorize decaying fruit waste by producing value added products as well as in safe disposal of waste.

Mechanical, thermal, and viscoelastic investigations on expanded perlite–filled high-density polyethylene composite

2018 ◽  
Vol 50 (8) ◽  
pp. 747-761 ◽  
Author(s):  
Metehan Atagür ◽  
Mehmet Sarikanat ◽  
Tuğçe Uysalman ◽  
Ozan Polat ◽  
İffet Yakar Elbeyli ◽  
...  
Keyword(s):  
High Density Polyethylene ◽  
Loss Modulus ◽  
Value Added ◽  
Weight Fraction ◽  
Mechanical Tests ◽  
High Density ◽  
Morphological Properties ◽  
X Ray Diffraction ◽  
Polyethylene Composite ◽  
Value Added Products

Perlite is a glassy amorphous volcanic rock and generally used in construction industries. Possible uses of perlite powder in polymeric composites allow producing value-added products. In this study, expanded Turkish perlite (TP) powder was characterized by particle size distribution and Brunauer–Emmett–Teller analysis. TP-filled high-density polyethylene (HDPE) composites were manufactured via thermokinetic mixer by adding various weight fractions of TP powder (5, 10, 20, and 30 wt%) into HDPE matrix. Produced composites were characterized by Fourier transform infrared spectroscopy, thermogravimetric analysis, dynamic mechanic analysis, X-ray diffraction, and mechanical and thermal conductivity tests. From mechanical tests, it was observed that HDPE + 5% TP exhibited the greatest tensile strength. Flexural strength of the TP-filled HDPE composite was increased with the increasing TP content. Morphological properties of TP-filled HFPE composites were examined by scanning electron microscopy. As the weight fraction of TP was increased, storage modulus and loss modulus of the composites were increased. Moreover, the relaxation peak of HDPE was increased by the incorporation of TP into HDPE.

Synthesis and Characterization Polyaniline/Cobalt Oxide Nanocomposite by Chemical Oxidation Method

2018 ◽  
Vol 1 (1) ◽  
pp. 9-20 ◽  
Author(s):  
M Haridevi ◽  
S Prabu ◽  
M Lakshmi Devi ◽  
E Bhakya Lakshmi ◽  
K Mohanraj ◽  
...  
Keyword(s):  
Cobalt Chloride ◽  
Uv Light ◽  
Low Cost ◽  
Oxidative Polymerization ◽  
Chemical Oxidation ◽  
X Ray Diffraction ◽  
Chemical Oxidative Polymerization ◽  
Photo Degradation ◽  
X Ray ◽  
Polymerization Method

The Co3O4-PANI nanocomposites has been synthesized by chemical oxidative polymerization method using cobalt chloride. It is a simple and low cost method to prepare nanocomposite. The prepared samples were characterized by using Scanning Electron Microscope (SEM), X-ray diffraction (XRD) and Fourier Transform Spectroscopy (FTIR) to get surface morphology, idea of getting particles of nano sized range so that further characterization can be done, to study the net surface charge of the nanoparticles by Zeta potential, photoluminescence of synthesized nanocomposite and measure photocatalytic activity of the synthesized nanomaterials was successfully tested for photo degradation of dye under UV light were studied

scholarly journals Fish Waste-Potential Low Cost Substrate for Bacterial Protease Production: A Brief Review

2016 ◽  
Vol 10 (1) ◽  
pp. 335-341 ◽  
Author(s):  
Aishwarya Ramkumar ◽  
Nallusamy Sivakumar ◽  
Reginald Victor
Keyword(s):  
Low Cost ◽  
Value Added ◽  
Protease Production ◽  
Industrial Biotechnology ◽  
Fish Waste ◽  
Environment And Health ◽  
Protease Enzyme ◽  
The Rich ◽  
The Cost ◽  
Value Added Products

Industrial biotechnology processes have recently been exploited for an economic utilization of wastes to produce value added products. Of which, fish waste is one of the rich sources of proteins that can be utilized as low cost substrates for microbial enzyme production. Fish heads, tails, fins, viscera and the chitinous materials make up the wastes from fish industries. Processing these wastes for the production of commercial value added products could result in a decrease in the cost of production. In addition, we can eliminate the pollution of the environment and health issues due to the improper disposal of these fish wastes. This review highlights the potential use of fish waste as a cheaper substrate for the production of economically important protease enzyme.

Sign in / Sign up

Export Citation Format

Share Document