Influence of Onion-like Carbonaceous Particles on the Aggregation Process of Hydrocarbons

Studies of rotavirus particles in humans, monkeys and various non-primates with acute gastroenteritis have involved detection of virus in fecal material by electron microscopy. The EM techniques most commonly employed have been the conventional negative staining (Fig. 1) and immune aggregation (Fig. 2) procedures. Both methods are somewhat insensitive and can most reliably be applied to samples containing large quantities of virus either naturaLly or as a result of concentration by ultracentrifugation. The formation of immune complexes by specific antibody in the immune aggregation procedures confirms the rotavirus diagnosis, but the number of particles per given microscope field is effectively reduced by the aggregation process. In the present communication, we describe use of an on-grid immunoelectron microscopic technique in which rotavirus particles are mounted onto microscope grids that were pre-coated with specific antibody. The technique is a modification of a method originalLy introduced by Derrick (1) for studies of plant viruses.

Download Full-text

Faculty Opinions recommendation of Identification of a 2-stage platelet aggregation process mediating shear-dependent thrombus formation.

Faculty Opinions – Post-Publication Peer Review of the Biomedical Literature ◽

10.3410/f.1065941.518899 ◽

2007 ◽

Author(s):

Isobel Walker

Keyword(s):

Platelet Aggregation ◽

Thrombus Formation ◽

Aggregation Process

Download Full-text

Study on Macroscopic Properties, Microstructure and Aggregation Process of Monoglyceride and Vegetable Wax Based Oleofoams

10.21748/am20.164 ◽

2020 ◽

Author(s):

Zong Meng ◽

Liyang Du ◽

Yuanfa Liu

Keyword(s):

Aggregation Process ◽

Macroscopic Properties

Download Full-text

Valorization of Apple Peels through the Study of the Effects on the Amyloid Aggregation Process of κ-Casein

Molecules ◽

10.3390/molecules26082371 ◽

2021 ◽

Vol 26 (8) ◽

pp. 2371

Author(s):

Valeria Guarrasi ◽

Giacoma Cinzia Rappa ◽

Maria Assunta Costa ◽

Fabio Librizzi ◽

Marco Raimondo ◽

...

Keyword(s):

Protein Aggregation ◽

Environmental Sustainability ◽

Bovine Milk ◽

Amyloid Formation ◽

Aggregation Process ◽

Amyloid Aggregation ◽

Social Challenges ◽

Force Microscopy ◽

Atomic Force ◽

Apple Peels

Waste valorization represents one of the main social challenges when promoting a circular economy and environmental sustainability. Here, we evaluated the effect of the polyphenols extracted from apple peels, normally disposed of as waste, on the amyloid aggregation process of κ-casein from bovine milk, a well-used amyloidogenic model system. The effect of the apple peel extract on protein aggregation was examined using a thioflavin T fluorescence assay, Congo red binding assay, circular dichroism, light scattering, and atomic force microscopy. We found that the phenolic extract from the peel of apples of the cultivar “Fuji”, cultivated in Sicily (Caltavuturo, Italy), inhibited κ-casein fibril formation in a dose-dependent way. In particular, we found that the extract significantly reduced the protein aggregation rate and inhibited the secondary structure reorganization that accompanies κ-casein amyloid formation. Protein-aggregated species resulting from the incubation of κ-casein in the presence of polyphenols under amyloid aggregation conditions were reduced in number and different in morphology.

Download Full-text

Modeling of the Transition Layer in Ceramic Matrix Composites from Coal Wastes and Clay

Solid State Phenomena ◽

10.4028/www.scientific.net/ssp.299.37 ◽

2020 ◽

Vol 299 ◽

pp. 37-42

Author(s):

O.A. Fomina ◽

Andrey Yu. Stolboushkin

Keyword(s):

Transition Layer ◽

Raw Materials ◽

Ceramic Matrix Composite ◽

Ceramic Matrix Composites ◽

Ceramic Matrix ◽

Coal Waste ◽

Matrix Composites ◽

Carbonaceous Particles ◽

The Core ◽

Coal Wastes

A model of the transition layer between the shell and the core of a ceramic matrix composite from coal waste and clay has been developed. The chemical, granulometric and mineral compositions of the beneficiation of carbonaceous mudstones and clay were studied. The technological and ceramic properties of raw materials for the samples manufacturing were determined. The method of manufacturing multilayer ceramic samples from coal waste, clay and their mixture is given. The number of transition layers in the contact zone between the clay shell and the core from coal wastes is determined. The deformation and swelling phenomena of model samples from coal wastes, clay, and their mixtures were revealed at the firing temperature of more than 1000 °C. The formation of a reducing ambient in the center of the sample with insufficient air flow is shown. The influence of the carbonaceous particles amount and the ferrous form iron oxide in the coal wastes on the processes of expansion of multilayer samples during firing has been established.

Download Full-text

Effect of electric permittivity of the solvent on aggregation process of the water-soluble sulfonated metal phthalocyanines

Journal of Photochemistry and Photobiology A Chemistry ◽

10.1016/j.jphotochem.2011.08.012 ◽

2011 ◽

Vol 223 (2-3) ◽

pp. 149-156 ◽

Cited By ~ 10

Author(s):

Krystyna Palewska ◽

Juliusz Sworakowski ◽

Józef Lipiński ◽

Stanislav Nešpůrek

Keyword(s):

Water Soluble ◽

Aggregation Process ◽

Electric Permittivity ◽

Metal Phthalocyanines

Download Full-text

ELECTROCHEMICAL STORAGE OF HYDROGEN IN CARBON NANOSTRUCTURES

International Journal of Nanoscience ◽

10.1142/s0219581x03001334 ◽

2003 ◽

Vol 02 (04n05) ◽

pp. 307-317

Author(s):

M. S. YU ◽

S. Y. CHENG ◽

Y. C. LIN ◽

W. C. HO

Keyword(s):

Carbon Nanostructures ◽

Room Temperature ◽

Hydrogen Adsorption ◽

Abundance Ratio ◽

Nanostructured Carbon ◽

Half Cell ◽

Carbonaceous Particles ◽

Catalytic Thermal Decomposition ◽

Electrochemical Storage ◽

Preliminary Study

We have synthesized a set of nanostructured carbon samples including a variety of carbon nanotubes and carbonaceous particles, by catalytic thermal decomposition of CH4 on catalyst LaNi 5 powder with different reaction temperatures. Products obtained at reaction temperatures 550~900°C were characterized by means of HR-TEM, SEM and Raman Scattering. In addition, electrochemical charge–discharge cycling method was carried out at room temperature to measure the reversible hydrogen capacity in pressed electrodes containing mixture of catalyst, nanostructured carbon samples and carbonaceous particles. Results showed that the abundance ratio of well-crystallized graphite to amorphous carbon in each product increases with increasing reaction temperatures. This preliminary study showed also that the hydrogen storage capacity of synthesis products measured in an electrochemical half-cell at room temperature correlates with the nanostructure and morphology of the variety of nanostructured carbon samples. Additionally, the hydrogen adsorption capacity against specific surface area (BET) for synthesis products produced at temperatures higher than 670°C is ranging from 14 to 25 wt.%/(1000 m2/g).

Download Full-text