In vitro biological properties and characterization of nanosilver coated cotton fabrics – An application for antimicrobial textile finishing

2016 ◽  
Vol 107 ◽  
pp. 48-55 ◽  
Author(s):  
M.D. Balakumaran ◽  
R. Ramachandran ◽  
S. Jagadeeswari ◽  
P.T. Kalaichelvan
Keyword(s):  
Biological Properties ◽  
Cotton Fabrics ◽  
Properties And Characterization ◽  
Textile Finishing ◽  
Coated Cotton

FABRICATION AND CHARACTERIZATION OF CALCIUM SILICATE SCAFFOLDS FOR TISSUE ENGINEERING

2014 ◽  
Vol 14 (04) ◽  
pp. 1450049 ◽  
Author(s):  
CIJUN SHUAI ◽  
ZHONGZHENG MAO ◽  
ZIKAI HAN ◽  
SHUPING PENG ◽  
ZHENG LI
Keyword(s):  
Tissue Engineering ◽  
Calcium Silicate ◽  
Laser Power ◽  
Selective Laser Sintering ◽  
Biological Properties ◽  
High Temperature Phase ◽  
Temperature Phase ◽  
Conventional Technology

Calcium silicate ( CaSiO 3) is a promising material due to its favorable biological properties. However, it was difficult to fabricate ceramic scaffolds with interconnected porous structure via conventional technology. In present study, CaSiO 3 scaffolds with totally interconnected pores were fabricated via selective laser sintering (SLS). The microstructure, mechanical and biological properties were examined. The results revealed that the powder gradually fused together with the reduction of voids and the elimination of particle boundary as the laser power increased in the range of 3–15 W with scanning electron microscope. Meanwhile the low-temperature phase (β- CaSiO 3) transformed into high-temperature phase (α- CaSiO 3) gradually, which decreased the mechanical properties of the obtained scaffolds. Besides, the compressive strength increased from 12.9 ± 2.34 MPa to 18.19 ± 1.24 MPa (the laser power is 12 w) and then decreased gradually with increasing laser power. In vitro biological properties of CaSiO 3 scaffolds sintered under optimal conditions indicated that the distribution of apatite mineralization became uniform as the amount of them increased after being immersed in simulated body fluids. In the meantime, the thin cytoplasmic extensions of MG-63 cells increased until formed a dense cell layer after 1–5 days of cell culture. The results suggested that the CaSiO 3 scaffold fabricated via SLS has potential application for bone tissue engineering.

scholarly journals Leaf mineral element content and soil characteristics on in vitro antioxidant and enzymatic inhibitory activities of aqueous fennel extracts

2021 ◽  
pp. 73
Author(s):  
Nesrine Majdoub ◽  
Soukaina el Guendouz ◽  
Jorge Carlier ◽  
Clara Costa ◽  
Carlos Alberto Correia Guerrero ◽  
...  
Keyword(s):  
Biochemical Characterization ◽  
Biological Properties ◽  
Mineral Elements ◽  
Soil Conditions ◽  
Human Consumption ◽  
Foeniculum Vulgare ◽  
Growing Conditions ◽  
Spearman’S Correlation

This study was conducted to evaluate the biochemical characterization of three harvested Foeniculum vulgare plants collected from two bioclimatic zones in order to investigate the soil growing conditions effect. The results showed a great variability of the phenolic amounts and biological properties of samples rely on localities. FvSEN contained the highest amounts of phenolic compounds. These amounts were accompanied by the greatest antioxidant ability through almost studied assays. FvSEN and FvZO were significantly different. In addition, the samples exhibited a significant and variable enzymatic inhibition activity with values ranging from 30 to 50 µg/mL for lipoxygenase assay. But these extracts did not revealed significant differences on their tyrosinase abilities. On the other hand, the levels of mineral elements were also estimated. These contents varied depending on sample and locality. The growing soil conditions of samples in terms of different parameters is likely related to their antioxidant and enzyme inhibition potentialities added to their mineral composition which settled by Spearman’s correlation. These data may confirm the interesting potential of F. vulgare as a valuable source for natural antioxidant molecules but the growing soil conditions can affect all the potentialities of these plants set for human consumption and other uses.

scholarly journals Characterization of Andean Blueberry in Bioactive Compounds, Evaluation of Biological Properties and in vitro Bioaccessibility

2020 ◽  
Author(s):  
Nieves Baenas ◽  
Jenny Ruales ◽  
Diego A. Moreno ◽  
Daniel Alejandro Barrio ◽  
Carla M. Stinco ◽  
...  
Keyword(s):  
Antioxidant Capacity ◽  
Bioactive Compounds ◽  
Biological Activities ◽  
In Vitro Digestion ◽  
Biological Properties ◽  
Wide Range ◽  
Zebrafish Embryogenesis

Andean blueberries are wild berries grown and consumed in Ecuador which contain high values of bioactive compounds, mainly anthocyanins, with powerful antioxidant activity. The aim of this study was to evaluate the profile and contents of (poly)phenols and carotenoids in Andean blueberry by HPLC-DAD-MSn and determine a wide range of its biological activities. The antioxidant capacity of this fruit was evaluated in vitro by three different methods and in vivo using the zebrafish animal model, also the toxicity effect was determined by the zebrafish embryogenesis test. Besides, the antimicrobial activity and the capacity of Andean blueberry to produce hemagglutination in blood cells were evaluated. Finally, the bioaccessibility of (poly)phenols and related antioxidant capacity were determined in the different phases of an in vitro digestion. The global results indicated no toxicity of Andean blueberry, weakly bacteriostatic activity, and high contents of anthocyanins and antioxidant capacity, which were partially bioaccesible in vitro (~ 50 % at the final intestinal step), contributing to the knowledge of its health benefits for consumers and its potential use in the food and pharmaceutical industry as functional ingredient.

Biological Properties and Characterization of Lectin from Red Kidney Bean (Phaseolus Vulgaris)

2008 ◽  
Vol 25 (1) ◽  
pp. 12-27 ◽  
Author(s):  
Jianshe Zhang ◽  
John Shi ◽  
Sanja Ilic ◽  
Sophia Jun Xue ◽  
Yukio Kakuda
Keyword(s):  
Phaseolus Vulgaris ◽  
Biological Properties ◽  
Kidney Bean ◽  
Properties And Characterization ◽  
Red Kidney Bean

scholarly journals Synthesis and Characterization of Chitosan Nanoaggregates from Gladius ofUroteuthis duvauceli

2016 ◽  
Vol 2016 ◽  
pp. 1-9 ◽  
Author(s):  
J. R. Anusha ◽  
Albin T. Fleming
Keyword(s):  
Binding Capacity ◽  
Drug Carrier ◽  
Reducing Power ◽  
Cancer Cell Line ◽  
High Water ◽  
Biological Properties ◽  
Cervical Cancer Cell Line ◽  
Transmission Electron

We report the synthesis, characterization, and biological properties of chitosan nanoaggregates from gladius of squid,Uroteuthis duvauceli.β-Chitin extracted from gladius was deacetylated to chitosan and further reduced to nanosize using ionic gelation process. The morphology and occurrence of chitosan nanoaggregates (CSNA) were observed using transmission electron microscopy (TEM). The degree of deacetylation (DD%) calculated from Fourier transform infrared (FTIR) spectrum showed high value (~94 ± 1.25%) for chitosan. The CSNA depicts low molecular weight, stable positive zeta potential, and less ash and moisture content with high water and fat binding capacity. The antimicrobial activity was tested against pathogenic microorganisms, which depicted significant rate of inhibition againstStaphylococcus aureusandEscherichia colidue to high cellular uptake. The antioxidant analysis for CSNA demonstrated high reducing power and scavenging activity towards superoxide radicals compared with the commercially available chitosan. Furthermore, nanoaggregates exhibited low cytotoxic behavior in biologicalin vitrotests performed using cervical cancer cell line. These results indicate that chitosan nanoaggregates synthesized from waste gladius will be highly efficient and safe candidate for biological applications as food packing film, drug carrier, and tissue engineering.

The Potential of Frog Skin Peptides for Anti-Infective Therapies: The Case of Esculentin-1a(1-21)NH2

2020 ◽  
Vol 27 (9) ◽  
pp. 1405-1419 ◽  
Author(s):  
Bruno Casciaro ◽  
Floriana Cappiello ◽  
Maria Rosa Loffredo ◽  
Francesca Ghirga ◽  
Maria Luisa Mangoni
Keyword(s):  
Frog Skin ◽  
Contact Lenses ◽  
Wide Spectrum ◽  
Structural Features ◽  
Biological Properties ◽  
Antibacterial Surface ◽  
High Concentrations

Antimicrobial Peptides (AMPs) are the key effectors of the innate immunity and represent promising molecules for the development of new antibacterial drugs. However, to achieve this goal, some problems need to be overcome: (i) the cytotoxic effects at high concentrations; (ii) the poor biostability and (iii) the difficulty in reaching the target site. Frog skin is one of the richest natural storehouses of AMPs, and over the years, many peptides have been isolated from it, characterized and classified into several families encompassing temporins, brevinins, nigrocins and esculentins. In this review, we summarized how the isolation/characterization of peptides belonging to the esculentin-1 family drove us to the design of an analogue, i.e. esculentin-1a(1-21)NH2, with a powerful antimicrobial action and immunomodulatory properties. The peptide had a wide spectrum of activity, especially against the opportunistic Gram-negative bacterium Pseudomonas aeruginosa. We described the structural features and the in vitro/in vivo biological characterization of this peptide as well as the strategies used to improve its biological properties. Among them: (i) the design of a diastereomer carrying Damino acids in order to reduce the peptide’s cytotoxicity and improve its half-life; (ii) the covalent conjugation of the peptide to gold nanoparticles or its encapsulation into poly(lactide- co-glycolide) nanoparticles; and (iii) the peptide immobilization to biomedical devices (such as silicon hydrogel contact lenses) to obtain an antibacterial surface able to reduce microbial growth and attachment. Summing up the best results obtained so far, this review traces all the steps that led these frog-skin AMPs to the direction of peptide-based drugs for clinical use.

scholarly journals A new antibiotic, fumaramidmycin. I. Production, biological properties and characterization of producer strain.

1975 ◽  
Vol 28 (9) ◽  
pp. 636-647 ◽  
Author(s):  
HIROMI B. MARUYAMA ◽  
YASUJI SUHARA ◽  
JUNKO SUZUKI-WATANABE ◽  
YOSHIFUMI MAESHIMA ◽  
NOBUKO SHIMIZU ◽  
...  
Keyword(s):  
Biological Properties ◽  
Producer Strain ◽  
Properties And Characterization
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