Separation of short fibers from bulk chrysotile asbestos fiber materials: analysis and physico-chemical characterization.

The aqueous sedimentation behavior of commercial chrysotile asbestos fibers has been investigated and a simple method for separating short fibers (90% < 2 μm) could be devised based on selective sedimentation. Chemical, X-ray structural, and differential thermal analyses show that the short fibers have chrysotile composition and structure, with lower brucite (Mg(OH)2) and iron contents than the bulk fibers. The length distribution of these short fibers exhibits a maximum at 0.3 μm and a width-at-half-height of ∼0.5 μm. Surface adsorption studies yield specific areas of 20 and 28 m2/g for N2 and H2O respectively. Because of their finely divided state and narrow length distribution, such fibers should be well suited for a variety of physico-chemical, chemical, and biological investigations on chrysotile fibers.

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Nanoliposomes and Nanoemulsions Based on Chia Seed Lipids: Preparation and Characterization

International Journal of Molecular Sciences ◽

10.3390/ijms21239079 ◽

2020 ◽

Vol 21 (23) ◽

pp. 9079

Author(s):

Daria V. Kuznetcova ◽

Michel Linder ◽

Carole Jeandel ◽

Cedric Paris ◽

Frederic Desor ◽

...

Keyword(s):

Lipid Extraction ◽

Chemical Characterization ◽

Soxhlet Extraction ◽

Composition Analysis ◽

Omega 3 ◽

Spontaneous Emulsification ◽

Simple Method ◽

Seed Lipids ◽

Physico Chemical ◽

Chia Seed

Polyunsaturated fatty acids (PUFA) are important in reducing the risk for cardiovascular, metabolic and neurodegenerative diseases. Chia (Salvia hispanica L.) seeds contain high levels of omega-3 PUFA, α-linolenic acid (ALA) in particular, and are a potential source for development of omega-3 PUFA-based products. Our objective was to obtain and characterize chia seed lipids, focusing on phospholipid fraction, and to investigate their use in the formulation of nanoemulsions (NE) and nanoliposomes (NL). Solvent-based lipid extraction was performed on the ORURO variety of chia seeds, followed by lipid composition analysis using GC and LC-MS and physico-chemical characterization of chia NL and NE. Folch extraction led to a slightly higher yield of ALA as compared to Soxhlet extraction. Lipid, phospholipid, and fatty acid composition analysis of the oil and residue revealed that the residue was rich in phospholipids; these were used to prepare NE and NL. Physico-chemical characterization showed that NE and NL were generally spherical (transmission electron microscopy), with a size of <120 nm under hydrated conditions that remained stable over 5 days. In conclusion, chia oil and phospholipid-rich residue can be used to obtain stable NL or NE using a simple method that involves spontaneous emulsification during lipid hydration, which potentially may be useful in cosmetics, pharmaceutical, and other health applications.

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Biological and physico-chemical characterization of ultra high diluted Hydrastis canadensis and in vitro studies on mammalian cells

Allgemeine Homöopathische Zeitung ◽

10.1055/s-0037-1601241 ◽

2017 ◽

Vol 262 (02) ◽

pp. 2-76

Author(s):

N Chandrakar ◽

MK Temgire ◽

SG Kane ◽

AK Suresh ◽

J Bellare

Keyword(s):

Mammalian Cells ◽

Chemical Characterization ◽

In Vitro Studies ◽

Hydrastis Canadensis ◽

Physico Chemical

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Laboratory Methods for the Physico-Chemical Characterization of Recombinant Allergens as Reference Standards

Alergologia ◽

10.26416/aler.4.1.2020.2978 ◽

2020 ◽

Vol 1 (4) ◽

pp. 7

Author(s):

Mariana Vieru ◽

Florin-Dan Popescu ◽

Laura Haidar ◽

Carmen Bunu-Panaitescu

Keyword(s):

Chemical Characterization ◽

Reference Standards ◽

Recombinant Allergens ◽

Laboratory Methods ◽

Physico Chemical

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Physico-chemical characterization of slag waste from coal gasification syngas plants: Effect of the gasification temperature on slag waste as construction material

Materials Testing ◽

10.3139/120.111072 ◽

2017 ◽

Vol 59 (9) ◽

pp. 783-789 ◽

Cited By ~ 1

Author(s):

Bongjin Jung ◽

Seung-Jong Lee ◽

Sungkyu Lee ◽

Nayeon Lee ◽

Wonjun Nam ◽

...

Keyword(s):

Coal Gasification ◽

Construction Material ◽

Chemical Characterization ◽

Physico Chemical ◽

Slag Waste ◽

Gasification Temperature

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Mineralogical and physico-chemical characterization of a sintered feldspathic sand

Annales de Chimie Science des Matériaux ◽

10.3166/acsm.35.261-267 ◽

2010 ◽

Vol 35 (5) ◽

pp. 261-267 ◽

Cited By ~ 1

Author(s):

Wissemn Gallala ◽

Mohamed Essghaier Gaied ◽

Borhen Kchaou

Keyword(s):

Chemical Characterization ◽

Physico Chemical

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Nanotechnologies. Guidance on physico-chemical characterization of engineered nanoscale materials for toxicologic assessment

10.3403/30197607 ◽

2012 ◽

Cited By ~ 1

Keyword(s):

Chemical Characterization ◽

Nanoscale Materials ◽

Physico Chemical

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Physical - Chemical Issues of Cephalosporin Intercalated Nanoparticles for Life - Threatening Infections Treatment

Revista de Chimie ◽

10.37358/rc.20.3.8007 ◽

2001 ◽

Vol 71 (3) ◽

pp. 342-349

Author(s):

Lucian Eva ◽

Letitia Doina Duceac ◽

Liviu Stafie ◽

Constantin Marcu ◽

Geta Mitrea ◽

...

Keyword(s):

Chemical Characterization ◽

Advanced Characterization ◽

Generation Cephalosporin ◽

Fourth Generation ◽

Exchange Method ◽

Physico Chemical ◽

Life Threatening ◽

Double Hydroxide ◽

Double Hydroxides

The fourth generation cephalosporin antibacterial agent, cefepime, was loaded into layered double hydroxides for enhancing antibiotic efficiency, reducing side effects, as well as achieving the sustained release property. The intercalation of antibiotic into the inter-gallery of ZnAl-layered double hydroxide (LDH) was carried out using ion exchange method, by this constituting a nano-sized organic-inorganic hybrid material for a controlled release novel formulation. Although cefepime is a broad spectrum antibiotic, it has various adverse effects and a significant degradation rate. Thus, the preparation and physico-chemical characterization of nanomaterials able to intercalate this drug is an important study for medical and pharmaceutical field. The antibiotic inclusion into LDHs nanostructure was confirmed by advanced characterization techniques and the release profile of cefepime was analysed with the respect to pH of the simulated media.

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