scholarly journals Extraction of Nanochitin from Marine Resources and Fabrication of Polymer Nanocomposites: Recent Advances

Polymers ◽  
2020 ◽  
Vol 12 (8) ◽  
pp. 1664
Author(s):  
Blessy Joseph ◽  
Rubie Mavelil Sam ◽  
Preetha Balakrishnan ◽  
Hanna J. Maria ◽  
Sreeraj Gopi ◽  
...  
Keyword(s):  
High Performance ◽  
Economic Value ◽  
Chemical Characterization ◽  
Functional Materials ◽  
Biological Properties ◽  
Good Opportunity ◽  
Physico Chemical ◽  
Mechanical Methods ◽  
Wide Range ◽  
Food Residues

Industrial sea food residues, mainly crab and shrimp shells, are considered to be the most promising and abundant source of chitin. In-depth understanding of the biological properties of chitin and scientific advancements in the field of nanotechnology have enabled the development of high-performance chitin nanomaterials. Nanoscale chitin is of great economic value as an efficient functional and reinforcement material for a wide range of applications ranging from water purification to tissue engineering. The use of polymers and nanochitin to produce (bio) nanocomposites offers a good opportunity to prepare bioplastic materials with enhanced functional and structural properties. Most processes for nanochitin isolation rely on the use of chemical, physical or mechanical methods. Chitin-based nanocomposites are fabricated by various methods, involving electrospinning, freeze drying, etc. This review discusses the progress and new developments in the isolation and physico-chemical characterization of chitin; it also highlights the processing of nanochitin in various composite and functional materials.

Cholinium-amino acid based ionic liquids: a new method of synthesis and physico-chemical characterization

2015 ◽  
Vol 17 (32) ◽  
pp. 20687-20698 ◽  
Author(s):  
Serena De Santis ◽  
Giancarlo Masci ◽  
Francesco Casciotta ◽  
Ruggero Caminiti ◽  
Eleonora Scarpellini ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Amino Acid ◽  
Room Temperature ◽  
Chemical Characterization ◽  
New Method ◽  
Room Temperature Ionic Liquids ◽  
Synthetic Method ◽  
Chemical Structures ◽  
Physico Chemical ◽  
Wide Range

Fourteen cholinium-amino acid based room temperature ionic liquids were prepared using a cleaner synthetic method. Chemicophysical properties were well correlated with the wide range of amino acid chemical structures.

Physico-chemical Characterization of Forest and Agricultural Residues for Energy Conversion Processes

2021 ◽  
Vol 37 (1) ◽  
Author(s):  
Nguyen Hong Nam ◽  
Le Gia Thanh Truc ◽  
Khuong Duy Anh ◽  
Laurent Van De Steene
Keyword(s):  
Energy Conversion ◽  
Chemical Characterization ◽  
Calorific Value ◽  
Forest Residues ◽  
Physico Chemical ◽  
Wide Range ◽  
Biomass Resources ◽  
Thermochemical Processes ◽  
The Difference

Agricultural and forest residues are potential sources of renewable energy in various countries. However, the difference in characteristics of biomass resources presents challenges for energy conversion processes which often require feedstocks that are physically and chemically consistent. This study presented a complete and comprehensive database of characteristics of a wide range of agricultural and forest residues. Moisture, bulk density, calorific value, proximate and elemental compositions, as well as cellulose, hemicellulose, and lignin compositions of a wide range of biomass residues were analyzed. The major impacts of the variability in biomass compositions to biochemical and thermochemical processes were also discussed.

scholarly journals Development of Mango and Tomato Paste and It's Physico-Chemical Characterization

2020 ◽  
pp. 165-171
Author(s):  
Dakshan Kumar Nethaji ◽  
Sakamuri Suresh ◽  
J. Esther Hellan Prasanna ◽  
V. Vijayagopal ◽  
Gurusamy Ramesh
Keyword(s):  
Chemical Characterization ◽  
Value Added ◽  
Food Industries ◽  
Mango Tree ◽  
Tomato Paste ◽  
Physico Chemical ◽  
Wide Range ◽  
Tomato Product ◽  
Tomato Pulp ◽  
Fresh Pulp

Mangoes are most widely used in cuisine. The Soil requirement for cultivation of Mango tree is a hardy perennial and evergreen tree and it can be grown on a wide range of soils. Value added product such as Milk Shakes can be obtained from fresh pulp of Mango which acts as an excellent source of Vitamin-A and flavonoids. Similar to that high quality Tomato product can be prepared from tomato pulp by using uniformly ripened, red colour tomato. Thus Tomato is nutritious and mostly eaten as processed fruit. So the importance of Climatic Fruit in food industries for the manufacturing of value added Product has received great attention. So the objective of present study is to analyse the composition of mango and tomato and to develop the pulp, and also to know its shelf life which favour the health benefits.

scholarly journals Inhibitors of myo-Inositol Monophosphatase, ATCC 20928 Factors A and C. Isolation, Physico-chemical Characterization and Biological Properties.

1996 ◽  
Vol 49 (7) ◽  
pp. 611-616 ◽  
Author(s):  
STEFANIA STEFANELLI ◽  
FEDERICA SPONGA ◽  
PIETRO FERRARI ◽  
CRISTINA SOTTANI ◽  
EMILIANA CORTI ◽  
...  
Keyword(s):  
Chemical Characterization ◽  
Biological Properties ◽  
Inositol Monophosphatase ◽  
Physico Chemical

Nanoporous Metals for Catalytic and Optical Applications

MRS Bulletin ◽  
2009 ◽  
Vol 34 (8) ◽  
pp. 569-576 ◽  
Author(s):  
Yi Ding ◽  
Mingwei Chen
Keyword(s):  
Optical Properties ◽  
Fuel Cell ◽  
High Performance ◽  
Electrode Materials ◽  
Three Dimensional ◽  
Functional Materials ◽  
Porous Network ◽  
Highly Active ◽  
Wide Range ◽  
Nanoporous Metals

AbstractNanoporous metals (NPMs) made by dealloying represent a class of functional materials with the unique structural properties of mechanical rigidity, electrical conductivity, and high corrosion resistance. They also possess a porous network structure with feature dimensions tunable within a wide range from a few nanometers to several microns. Coupled with a rich surface chemistry for further functionalization, NPMs have great potential for applications in heterogeneous catalysis, electrocatalysis, fuel cell technologies, biomolecular sensing, surface-enhanced Raman scattering (SERS), and plasmonics. This article summarizes recent advances in some of these areas and, in particular, we focus on the discussion of microstructure, catalytic, and optical properties of nanoporous gold (NPG). With advanced electron microscopy, three-dimensional tomographic reconstructions of NPG have been realized that yield quantitative characterizations of key morphological parameters involved in the intricate structure. Catalytic and electrocatalytic investigations demonstrate that bare NPG is already catalytically active for many important reactions such as CO and glucose oxidation. Surface functionalization with other metals, such as Pt, produces very efficient electrocatalysts, which have been used as promising fuel cell electrode materials with very low precious metal loading. Additionally, NPG and related materials possess outstanding optical properties in plasmonics and SERS. They hold promise to act as highly active, stable, and economically affordable substrates in high-performance instrumentation applications for chemical inspection and biomolecular diagnostics. Finally, we conclude with some perspectives that appear to warrant future investigation.

scholarly journals Synthesis and biological activity of Hepta-O-acetyl-1-O- (2-chloro-3-phenyl thio propyl)-β-D-maltose

2021 ◽  
Author(s):  
Lali Tabatadze ◽  
Neli Sidamonidze ◽  
Darejan Gulbani ◽  
Darejan Iremashvili
Keyword(s):  
Biological Activity ◽  
Biological Properties ◽  
Biologically Active ◽  
Pharmaceutical Chemistry ◽  
Chemical Research ◽  
Negative Effects ◽  
Physico Chemical ◽  
Bactericidal Properties ◽  
Wide Range ◽  
The Relationship

Carbohydrate derivatives are distinguished with wide range of biological activity which is proven by successful usage of preparations made of Carbohydrate based in different branches of pharmaceutical chemistry. As a result of research of Carbohydrate compounde, the relationship between unique structure and its chemical and biological properties has been studied. Input of bulk liphophilic adamantine moiety in the proved medications or biologically active molecule in most cases is improved molecule’s biological characteristic, drug’s lipopilycity and prolonged actin is enhanced, and at the same time toxicity and side negative effects is reduced.We studied the reactions of acetylaryl glycosides with phenylsulfonyl chloride in the presence of a benzoyl peroxide catalyst. A new sulfur-containing glucoside was synthesized: Hepta-O-acetyl-1-O-(2-chloro-3-phenyl thio propyl)-β-D-maltose. The bactericidal properties of β-O-(2-chloro-3-phenyl thio propyl)-D-maltose of the obtained product after deacetylation were studied. With the help of the com­­pu­ter program PASS (Prediction of Activity Spectra for Substance) onlaines were able to predict the range of activity of substances. The obtained result established correlations on bactericidal properties between biological activity and the intended biological activity. The structure of the synthesized compounds was determined by physico-chemical research methods.

Advances in nano-biomaterials and their applications in biomedicine

2021 ◽  
Author(s):  
Yogita Patil-Sen
Keyword(s):  
Tissue Engineering ◽  
Regenerative Medicine ◽  
Biomedical Applications ◽  
Materials Science ◽  
Disease Diagnosis ◽  
Biological Properties ◽  
The Past ◽  
Physico Chemical ◽  
Wide Range ◽  
Biomolecules Detection

Nano0technology has received considerable attention and interest over the past few decades in the field of biomedicine due to the wide range of applications it provides in disease diagnosis, drug design and delivery, biomolecules detection, tissue engineering and regenerative medicine. Ultra-small size and large surface area of nanomaterials prove to be greatly advantageous for their biomedical applications. Moreover, the physico-chemical and thus, the biological properties of nanomaterials can be manipulated depending on the application. However, stability, efficacy and toxicity of nanoparticles remain challenge for researchers working in this area. This mini-review highlights the recent advances of various types of nanoparticles in biomedicine and will be of great value to researchers in the field of materials science, chemistry, biology and medicine.

scholarly journals The Bad and the Good—Microorganisms in Cultural Heritage Environments—An Update on Biodeterioration and Biotreatment Approaches

Materials ◽  
2021 ◽  
Vol 14 (1) ◽  
pp. 177
Author(s):  
Adam Pyzik ◽  
Karol Ciuchcinski ◽  
Mikolaj Dziurzynski ◽  
Lukasz Dziewit
Keyword(s):  
Cultural Heritage ◽  
Chemical Characterization ◽  
Physico Chemical ◽  
Mechanical Methods ◽  
Diverse Environment ◽  
Historical Objects ◽  
Bacteria And Fungi ◽  
Cultural Heritage Objects ◽  
The Impact

Cultural heritage objects constitute a very diverse environment, inhabited by various bacteria and fungi. The impact of these microorganisms on the degradation of artworks is undeniable, but at the same time, some of them may be applied for the efficient biotreatment of cultural heritage assets. Interventions with microorganisms have been proven to be useful in restoration of artworks, when classical chemical and mechanical methods fail or produce poor or short-term effects. The path to understanding the impact of microbes on historical objects relies mostly on multidisciplinary approaches, combining novel meta-omic technologies with classical cultivation experiments, and physico-chemical characterization of artworks. In particular, the development of metabolomic- and metatranscriptomic-based analyses associated with metagenomic studies may significantly increase our understanding of the microbial processes occurring on different materials and under various environmental conditions. Moreover, the progress in environmental microbiology and biotechnology may enable more effective application of microorganisms in the biotreatment of historical objects, creating an alternative to highly invasive chemical and mechanical methods.

scholarly journals Antioxidant Potential of Physicochemically Characterized Gracilaria blodgettii Sulfated Polysaccharides

Polymers ◽  
2021 ◽  
Vol 13 (3) ◽  
pp. 442
Author(s):  
Bilal Muhammad Khan ◽  
Li-Xin Zheng ◽  
Wajid Khan ◽  
Aftab Ali Shah ◽  
Yang Liu ◽  
...  
Keyword(s):  
Radical Scavenging Activity ◽  
Radical Scavenging ◽  
Chemical Characterization ◽  
Biological Properties ◽  
Antioxidant Potential ◽  
Random Coil ◽  
Sulfated Polysaccharides ◽  
Wide Range ◽  
Significant Difference ◽  
Potential Applications

Marine rhodophyte polysaccharides have a wide range of described biological properties with nontoxic characteristics, and show great potential in prebiotics and the functional foods industries. However, there is a virtual lack of Gracilaria blodgettii polysaccharides (GBP) profiling and their bioactivities. This study was designed while keeping in view the lack of physical and chemical characterization of GBP. This polysaccharide was also not previously tested for any bioactivities. A linear random coil conformation was observed for GBP, which was found to be a polysaccharide. A significant sulfate (w/w, 9.16%) and 3,6-anhydrogalactose (AHG, w/w, 17.97%) content was found in GBP. The significant difference in its setting (27.33 °C) and melting (64.33 °C) points makes it resistant to increasing heat. This, in turn, points to its utility in industrial scale processing and in enhancing the shelf-life of products under high temperatures. A radical scavenging activity of 19.80%, 25.42% and 8.80% was noted for GBP (3 mg/mL) in 2,2-diphenyl-1-picrylhydrazyl (DPPH), 2,2’-azino-bis (ABTS) and hydroxyl radical (HO) scavenging assays, respectively. Therefore, the findings suggest that Gracilaria blodgettii polysaccharides display a good antioxidant potential and may have potential applications in the functional food industry.

scholarly journals Physical Properties and Behaviour of Highly Bi-Substituted Magneto-Optic Garnets for Applications in Integrated Optics and Photonics

2011 ◽  
Vol 2011 ◽  
pp. 1-7 ◽  
Author(s):  
Mohammad Nur-E-Alam ◽  
Mikhail Vasiliev ◽  
Kamal Alameh ◽  
Viacheslav Kotov
Keyword(s):  
Thin Film ◽  
Physical Properties ◽  
Integrated Optics ◽  
High Performance ◽  
Functional Materials ◽  
Visible Spectral Region ◽  
Nanocomposite Films ◽  
Wide Range ◽  
Iron Garnet ◽  
Magneto Optic

Rare-earth and Bi-substituted iron garnet thin film materials exhibit strong potential for application in various fields of science and frontier optical technologies. Bi-substituted iron garnets possess extraordinary optical and MO properties and are still considered as the best MO functional materials for various emerging integrated optics and photonics applications. However, these MO garnet materials are rarely seen in practical photonics use due to their high optical losses in the visible spectral region. In this paper, we report on the physical properties and magneto-optic behaviour of high-performance RF sputtered highly bismuth-substituted iron garnet and garnet-oxide nanocomposite films of generic composition type (Bi, Dy/Lu)3(Fe, Ga/Al)5O12. Our newly synthesized garnet materials form high-quality nanocrystalline thin film layers which demonstrate excellent optical and MO properties suitable for a wide range of applications in integrated optics and photonics.

Sign in / Sign up

Export Citation Format

Share Document