scholarly journals The Physicochemical Properties of Graphene Nanocomposites Influence the Anticancer Effect

2019 ◽  
Vol 2019 ◽  
pp. 1-10 ◽  
Author(s):  
Wenbo Yang ◽  
Xiangyu Deng ◽  
Wei Huang ◽  
Xiangcheng Qing ◽  
Zengwu Shao
Keyword(s):  
Physicochemical Properties ◽  
Drug Loading ◽  
Chemical Properties ◽  
Photothermal Effect ◽  
Antitumor Effects ◽  
Graphene Nanocomposites ◽  
Graphene Nanocomposite ◽  
Systematic Understanding ◽  
Physical And Chemical ◽  
The Relationship

Graphene nanocomposite is an inorganic nanocomposite material, which has been widely used in the treatment of tumor at present due to its ability of drug loading, modifiability, photothermal effect, and photodynamic effect. However, the application of graphene nanocomposite is now limited due to the fact that the functions mentioned above are not well realized. This is mainly because people do not have a systematic understanding of the physical and chemical properties of GO nanomolecules, so that we cannot make full use of GO nanomolecules to make the most suitable materials for the use of medicine. Here, we are the first to discuss the influence of the physicochemical properties of graphene nanocomposite on the various functions related to their antitumor effects. The relationship between some important physicochemical properties of graphene nanocomposite such as diameter, shape, and surface chemistry and their functions related to antitumor effects was obtained through analysis, which provides evidence for the application of related materials in the future.

Metal Oxide-Graphene Nanocomposites

2014 ◽  
pp. 196-225
Author(s):  
Ponchami Sharma ◽  
Najrul Hussain ◽  
Manash R. Das ◽  
Ashvini B. Deshmukh ◽  
Manjusha V. Shelke ◽  
...  
Keyword(s):  
Metal Oxide ◽  
Materials Science ◽  
Metal Oxide Nanoparticles ◽  
Chemical Properties ◽  
Lithium Ion ◽  
Special Focus ◽  
Graphene Nanocomposites ◽  
Edge Surface ◽  
Graphene Nanocomposite ◽  
Physical And Chemical

Graphene is one of the most interesting materials in the field of nanoscience and nanotechnology. Metal oxide nanoparticles exhibit unique physical and chemical properties due to their reduced size and high density of corner or edge surface sites. The metal oxide-graphene nanocomposites not only possess favorable properties of graphene and metal oxide, but also greatly enhance the intrinsic properties due to the synergistic effect between them. These composites are used for catalysis, supercapacitors, lithium ion batteries, solar cells, sensors, removal of pollutants from water, etc. There is a very broad scope of further research for the development of metal oxide-graphene nanocomposites with enhanced properties for different applications. This chapter deals with a comprehensive review of the current research activities from the viewpoint of chemistry and materials science with a special focus on the synthesis, characterization, and applications of metal oxide-graphene nanocomposite materials.

scholarly journals Enhanced Tensile Strength of Monolithic Epoxy with Highly Dispersed TiO2-Graphene Nanocomposites

2021 ◽  
Vol 5 (7) ◽  
pp. 191
Author(s):  
Yanshuai Wang ◽  
Siyao Guo ◽  
Biqin Dong ◽  
Feng Xing
Keyword(s):  
Tensile Strength ◽  
Epoxy Resin ◽  
Mechanical Performance ◽  
Chemical Properties ◽  
High Mechanical Property ◽  
Graphene Nanocomposites ◽  
Highly Dispersed ◽  
Dispersion State ◽  
Physical And Chemical

The functionalization of graphene has been reported widely, showing special physical and chemical properties. However, due to the lack of surface functional groups, the poor dispersibility of graphene in solvents strongly limits its engineering applications. This paper develops a novel green “in-situ titania intercalation” method to prepare a highly dispersed graphene, which is enabled by the generation of the titania precursor between the layer of graphene at room temperature to yield titania-graphene nanocomposites (TiO2-RGO). The precursor of titania will produce amounts of nano titania between the graphene interlayers, which can effectively resist the interfacial van der Waals force of the interlamination in graphene for improved dispersion state. Such highly dispersed TiO2-RGO nanocomposites were used to modify epoxy resin. Surprisingly, significant enhancement of the mechanical performance of epoxy resin was observed when incorporating the titania-graphene nanocomposites, especially the improvements in tensile strength and elongation at break, with 75.54% and 176.61% increases at optimal usage compared to the pure epoxy, respectively. The approach presented herein is easy and economical for industry production, which can be potentially applied to the research of high mechanical property graphene/epoxy composite system.

scholarly journals Biophysical Characterization and Anticancer Activities of Photosensitive Phytoanthraquinones Represented by Hypericin and Its Model Compounds

Molecules ◽  
2020 ◽  
Vol 25 (23) ◽  
pp. 5666
Author(s):  
Valéria Verebová ◽  
Jiří Beneš ◽  
Jana Staničová
Keyword(s):  
Photodynamic Therapy ◽  
Biological Activities ◽  
Chemical Properties ◽  
Physical And Chemical Properties ◽  
Anticancer Activities ◽  
Model Compounds ◽  
Antitumor Effects ◽  
Biophysical Characterization ◽  
Physical And Chemical ◽  
And Chemical Properties

Photosensitive compounds found in herbs have been reported in recent years as having a variety of interesting medicinal and biological activities. In this review, we focus on photosensitizers such as hypericin and its model compounds emodin, quinizarin, and danthron, which have antiviral, antifungal, antineoplastic, and antitumor effects. They can be utilized as potential agents in photodynamic therapy, especially in photodynamic therapy (PDT) for cancer. We aimed to give a comprehensive summary of the physical and chemical properties of these interesting molecules, emphasizing their mechanism of action in relation to their different interactions with biomacromolecules, specifically with DNA.

scholarly journals Comparing the Physicochemical Properties of Upgraded Biomass Fuel by Torrefaction and the Ashless Technique

2019 ◽  
Vol 9 (24) ◽  
pp. 5519 ◽  
Author(s):  
Lkhagvadorj Sh ◽  
Byoung-Hwa Lee ◽  
Young-Joo Lee ◽  
Chung-Hwan Jeon
Keyword(s):  
Physicochemical Properties ◽  
Chemical Properties ◽  
High Heating Rate ◽  
Pine Sawdust ◽  
Herbaceous Biomass ◽  
High Heating ◽  
Pitch Pine ◽  
Proximate And Ultimate Analysis ◽  
Physical And Chemical ◽  
And Chemical Properties

The purpose of this study was to investigate and compare the influence of torrefaction and an ashless process on the physical and chemical properties of pitch pine sawdust (PSD) and kenaf as types of woody and herbaceous biomass. The physicochemical properties of the materials pretreated by the ashless process with torrefaction including proximate and ultimate analysis, hydrophobicity, grindability, morphology, and structure were analyzed. The results showed that when ashless Kenaf was torrefied, the high heating rate and atomic ratios of O/C and H/C increased. The tendency of the torrefied, ashless Kenaf to absorb water decreased, and it became more hydrophobic (approximately 0% for the uptake rate of moisture). In addition, the grindability of the torrefied, ashless Kenaf was substantially improved compared to that of pretreated PSD. Brunauer–Emmett–Teller and scanning electron microscopy results showed that when Kenaf was pretreated, particles easily lost their fibrous structure and cracked as the number of macropores decreased. These results indicate that the herbaceous biomass of Kenaf, when pretreated with both torrefaction and the ashless process, exhibits improved physicochemical properties compared to the woody PSD.

scholarly journals Rat α2 acute-phase macroglobulin. Isolation and physicochemical properties

1976 ◽  
Vol 159 (3) ◽  
pp. 661-665 ◽  
Author(s):  
F Gauthier ◽  
H Mouray
Keyword(s):  
Physicochemical Properties ◽  
Acute Phase ◽  
Polyacrylamide Gel Electrophoresis ◽  
Deae Cellulose ◽  
Chemical Properties ◽  
Amino Acid Content ◽  
Acute Phase Reactant ◽  
Biological Properties ◽  
Exchange Chromatography ◽  
Physical And Chemical

1. Rat α2 acute-phase macroglobulin was isolated from turpentine-injected rats by Sephadex G-200 chromatography and ion-exchange chromatography on DEAE-cellulose. This method, since it does not include (NH4)2SO4 treatment, allows the study of the physicochemical as well as the biological properties of the molecule. 2. The purity of the preparation was demonstrated by ultracentrifugation, polyacrylamide-gel electrophoresis, fused “rocket” immunoelectrophoresis as well as double immunodiffusion. 3. The rat α2 acute-phase macroglobulin was characterized in terms of its main physical and chemical properties. Its isoelctric point was determined by isoelectrofocusing to be 4.55; s020,w was 18.4S and E1%/1cm at 278 nm was 6.8. The mol.wt. was determined by light-scattering to be 770000. 4. The amino acid content was compared with that of rat α1 macroglobulin and was found very similar. The carbohydrate composition of α2 acute-phase macroglobulin was determined to be: hexose, 4.25%; glucosamine, 3.4%; sialic acid, 2%; fucose, 0.2%. From these results it was concluded that α2 acute-phase macroglobulin, although a typical acute-phase reactant, possesses the characteristic physicochemical properties of α macroglobulins.

THE INFLUENCE OF SOME PHYSICAL AND CHEMICAL PROPERTIES ON SOIL AGGREGATION AND RESPONSE TO VAMA

1966 ◽  
Vol 46 (2) ◽  
pp. 155-160 ◽  
Author(s):  
G. R. Saini ◽  
A. A. MacLean ◽  
J. J. Doyle
Keyword(s):  
Organic Matter ◽  
Soil Properties ◽  
Chemical Properties ◽  
Correlation Coefficients ◽  
Multiple Correlation Coefficient ◽  
Mean Weight Diameter ◽  
The Mean ◽  
Relationship Of ◽  
Physical And Chemical ◽  
The Relationship

The relationship of the mean weight diameter of water-stable aggregates to certain soil properties (clay, organic matter, free iron, free aluminum, and polysaccharide contents) and the relationship of the increase in aggregation caused by VAMA to the same properties of 24 New Brunswick soils were evaluated by correlation and regression analyses.Simple correlation coefficients relating aggregation to soil properties indicated that organic matter (r = 0.627), polysaccharides (r = 0.602), and aluminum (r = 0.679) were the most important factors. However, when the influence of each factor was separated by partial correlation, the coefficients were not significant. On the other hand, the combined effects of all factors as indicated by the multiple correlation coefficient (r = 0.743) was significant at the 1% level. The effect of the same soil properties on response to VAMA, as shown by increase in mean weight diameter, indicated that clay exerted the greatest influence. The relationship with other factors was nonsignificant.

scholarly journals Nanostructured terbium-doped ceria spheres: effect of dopants on their physical and chemical properties under reducing and oxidizing conditions

2015 ◽  
Vol 3 (31) ◽  
pp. 16120-16131 ◽  
Author(s):  
L. M. Acuña ◽  
F. F. Muñoz ◽  
C. A. Albornoz ◽  
A. G. Leyva ◽  
R. T. Baker ◽  
...  
Keyword(s):  
Physicochemical Properties ◽  
Synthesis Method ◽  
Chemical Properties ◽  
Physical And Chemical Properties ◽  
Doped Ceria ◽  
Physical And Chemical ◽  
And Chemical Properties

The effect of Tb content and synthesis method on the physicochemical properties of nanostructured Tb-doped ceria spheres was studied. The nanostructured spheres contained more Tb as Tb3+ than conventionally prepared nanopowders.

scholarly journals Niche analysis of dominant species in alpine desert grassland communities in Qaidam Basin

2021 ◽  
Vol 257 ◽  
pp. 03021
Author(s):  
Jiancai Sun ◽  
Yonghui Li ◽  
Deting Deng ◽  
Sha Yang ◽  
Yukun Wu ◽  
...  
Keyword(s):  
Plant Communities ◽  
Dominant Species ◽  
Qaidam Basin ◽  
Chemical Properties ◽  
Niche Overlap ◽  
Desert Plant ◽  
Desert Grassland ◽  
Qinghai Province ◽  
Physical And Chemical ◽  
The Relationship

Community dominant plants and their ecological niche research is the focus of community ecology research. To explore the niche characteristics of desert dominant plants and the relationship between them and soil factors in Qaidam Basin, and to provide a basis for the construction of desert plant communities and the sustainable management of natural resources in Qaidam Basin. Taking 13 desert plant communities in Qaidam Basin, Qinghai Province as the research objects, this paper analyzed the characteristics of desert plant communities and dominant species based on soil physical and chemical properties, and calculated the niche width and niche overlap of dominant plants. The dominant plants are, Haloxylon ammodendron, Tamarix chinensis, Achnatherum splendens, Poacynum hendersonii, Reaumuria songonica, Phragmites australiss, Sympegma regelii, and Ajania Tenuifolia, Artemisia sphaerocephala, Ceratoides latens, Pearl russianthistle, Scirpustriquter. There were different degree of niche overlap among species in the community. In addition, CCA sequencing showed that different species had different requirements on the environment, and the distribution of dominant species was mainly affected by soil total nitrogen and soil organic matter.

scholarly journals Effects of Rice Aging on Its Main Nutrients and Quality Characters

2019 ◽  
Vol 11 (17) ◽  
pp. 44
Author(s):  
Bo Peng ◽  
Lu-Lu He ◽  
Jing Tan ◽  
Li-Ting Zheng ◽  
Jie-Ting Zhang ◽  
...  
Keyword(s):  
Physicochemical Properties ◽  
Aging Process ◽  
Chemical Properties ◽  
Physiological Characteristics ◽  
Rice Grain ◽  
Physical And Chemical Properties ◽  
Rice Quality ◽  
Physical And Chemical ◽  
And Chemical Properties

The main nutrients in rice are starch, protein and lipids, and their contents and physicochemical properties have important effects on rice qualities. The aging process of rice is very complex, which not only changes physical and chemical properties, but also changes its physiological characteristics in rice grain. In this paper, the changes of physicochemical properties of its main nutrients (starch, protein and lipids) during storage were reviewed. At the same time, the effects of rice aging on its quality characters and the mechanism of rice aging were also discussed, which could provide reference for solving the problem of rice quality decline during storage.

scholarly journals Engineering technique for determining antifiction efficiency of emulsols for cold rolling by their physical and chemical properties

2018 ◽  
pp. 15-21
Author(s):  
J Vasilev ◽  
R Zamogilniy ◽  
D Samokysh
Keyword(s):  
Cold Rolling ◽  
Physicochemical Properties ◽  
Kinematic Viscosity ◽  
Chemical Properties ◽  
Physical And Chemical Properties ◽  
A Value ◽  
Engineering Technique ◽  
Washing Efficiency ◽  
Physical And Chemical ◽  
And Chemical Properties

An engineering technique was developed to determine the antifriction efficiency of emulsols during cold rolling according to their physicochemical properties. This method is based on the dimensionless exponent’s kсм, kвяз kэф and kотн.эф, taking into account, respectively, the influence of the chemical and physical properties of emulsols on the antifriction efficiency of the latter and the proposed dependencies for calculating rating of their antifriction efficiency. With the proposed method and criterion kотн.эф antifriction efficiency of 24 different emulsol it was investigated applied in cold rolling and the calculated rating antifriction their effectiveness. It is established that the high antifriction and washing efficiency of modern emulsols is achieved with a value of the kinematic viscosity of the latter at a level of 30-45 mm2/s and an increase in the saponification to 160-195 mg KOH/g.

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