scholarly journals Yeast Cells in Microencapsulation. General Features and Controlling Factors of the Encapsulation Process

Molecules ◽  
2021 ◽  
Vol 26 (11) ◽  
pp. 3123
Author(s):  
Giulia Coradello ◽  
Nicola Tirelli
Keyword(s):  
Cell Body ◽  
Low Cost ◽  
Controlling Factors ◽  
Yeast Cells ◽  
Chemical Characteristics ◽  
Hydrophobic Compounds ◽  
Pharmaceutical Applications ◽  
Physico Chemical ◽  
Encapsulation Process ◽  
Broad Overview

Besides their best-known uses in the food and fermentation industry, yeasts have also found application as microcapsules. In the encapsulation process, exogenous and most typically hydrophobic compounds diffuse and end up being passively entrapped in the cell body, and can be released upon application of appropriate stimuli. Yeast cells can be employed either living or dead, intact, permeabilized, or even emptied of all their original cytoplasmic contents. The main selling points of this set of encapsulation technologies, which to date has predominantly targeted food and—to a lesser extent—pharmaceutical applications, are the low cost, biodegradability and biocompatibility of the capsules, coupled to their sustainable origin (e.g., spent yeast from brewing). This review aims to provide a broad overview of the different kinds of yeast-based microcapsules and of the main physico-chemical characteristics that control the encapsulation process and its efficiency.

Some physico-chemical characteristics of low-cost viscose

1975 ◽  
Vol 6 (4) ◽  
pp. 406-409
Author(s):  
D. N. Arkhangelskii ◽  
V. G. Kulichikhin ◽  
E. B. Kostikova ◽  
A. P. Luvishis ◽  
T. B. Filicheva
Keyword(s):  
Low Cost ◽  
Chemical Characteristics ◽  
Physico Chemical

Curcumin-Loaded Nanocapsules: Formulation and Influence of the Nanoencapsulation Processes Variables on the Physico-Chemical Characteristics of the Particles

2009 ◽  
Vol 7 (1) ◽  
Author(s):  
Fabien Salaün ◽  
Isabelle Vroman
Keyword(s):  
Chemical Structure ◽  
Encapsulation Efficiency ◽  
Chemical Characteristics ◽  
Loading Capacity ◽  
Stirring Rate ◽  
Physico Chemical ◽  
Encapsulation Process ◽  
The Mean ◽  
Formulation Parameters ◽  
Polymer Wall

The aim of this work was to assess the influence of various formulation parameters on the incorporation of Curcumin into nanoparticles. For this purpose, the influence of the aqueous monomer (ethylene diamine, hexamethylene diamine, and 1,4-diaminobutane), as well as the effect of the stirring rate and the influence of the nanoencapsulation method on the encapsulation efficiency were investigated. It was found that variation in the amount of ingredients had profound effects on the curcuminoid loading capacity, the mean particle size, and size distribution. Furthermore, from the thermal results, it is concluded that the reactivity of diamine and the length of flexible methylene chain in diamine determine the thermal properties of resultant polymer wall membrane. The encapsulation yield depends not only on the encapsulation process but also on the chemical structure of the diamine. Whereas, the size and its distribution vary according to the process choice and the emulsification stirring rate.

scholarly journals ACTIVATED ADSORBENT PREPARED FROM BOVINE BONE WASTE: PHYSICO-CHEMICAL CHARACTERISTICS, ISOTHERM AND THERMODYNAMICS ADSORPTION OF CHROMIUM IONS IN WASTEWATER

2020 ◽  
Vol 7 (3) ◽  
pp. 1-11
Author(s):  
I Nengah Simpen ◽  
I Made Sutha Negara ◽  
Sofyan Dwi Jayanto
Keyword(s):  
Active Sites ◽  
Crystal Size ◽  
Physical Adsorption ◽  
Low Cost ◽  
Chemical Characteristics ◽  
Bovine Bone ◽  
Chromium Ions ◽  
Physico Chemical ◽  
Freundlich Adsorption Isotherm ◽  
Surface Active

The adsorption characteristics of chromium ions in chrome electroplating wastewater on low cost adsorbent have been conducted. Adsorbent was prepared from bovine bone waste of NaOH activated at various concentrations (0.2 to 0.8 M). Its adsorption such as adsorption isotherms and adsorption thermodynamics as well as adsorbent physico-chemical characteristics (surface active sites, crystallinity and crystal size, surface morphology and elementals composition). The result showed that amount of adsorbent surface active sites increased because of NaOH activated, the highest at 0.4 M NaOH concentration (AT0.4 adsorbent). X-ray diffraction patterns of the adsorbents showed a wide peaks and crystal size as nanocrystalline. The surface morfology was stack of aglomerates and leached of Ca and Mg due to increase Na. The adsorption result of adsorbents to chromium ions showed that the highest adsorption ability on AT0.4 adsorbent. It was suitable for Freundlich adsorption isotherm model as physical adsorption and endothermic but the tendency to be spontaneous process.

Microbial and Physico-Chemical Characteristics of Surface Water Sources Used on Dairy Farms in Ontario

2010 ◽  
Vol 45 (3) ◽  
pp. 287-294
Author(s):  
Lucie Masse, ◽  
Daniel I. Massé ◽  
Edward Topp ◽  
Guy Séguin ◽  
Andrew Scott ◽  
...  
Keyword(s):  
Surface Water ◽  
Low Cost ◽  
Safety Margin ◽  
Dairy Farms ◽  
Water Sources ◽  
Fecal Coliforms ◽  
Chemical Characteristics ◽  
Physico Chemical ◽  
History Of ◽  
Uv Transmittance

Abstract Six surface water sources used to wash milking equipment and provide drinking water to the animals on dairy farms in Eastern Ontario were characterized for microbial and physico-chemical characteristics over a 16 month period. The water sources were selected because they had a history of microbial contamination and presented a wide selection of physico-chemical characteristics. Results are discussed with respect to available on-site disinfection technologies. Total and fecal coliforms were detected in over 90% of all water samples, Escherichia coli and Enterococcus spp. in 77%, Clostridium perfringens and Yersinia enterocolitica in about 50%, Campylobacter spp. in 36%, and Salmonella in 25%. For all pathogens, counts were highly variable, and maximum values were 1 to 2 orders of magnitude higher than the medians. On-site disinfection systems will have to be designed to deactivate the highest count of pathogens, thereby providing a conservative safety margin for most of the year. Disinfection technologies will also have to be selected based on physico-chemical characteristics of the water sources, especially the level of hardness, turbidity and UV transmittance which can adversely affect their efficiency. On some farms, a pretreatment such as coagulation flocculation will be necessary to make the surface water suitable for low-cost disinfection technologies.

Study of Physico-chemical Characteristics and Pharmacological Effects of 1-Ethyl-Salicyldene-bis-Ethylene-Diamine and Its Complex with Mn(II)

2019 ◽  
Vol 70 (7) ◽  
pp. 2534-2537
Author(s):  
Gladiola Tantaru ◽  
Mihai Apostu ◽  
Antonia Poiata ◽  
Mihai Nichifor ◽  
Nela Bibire ◽  
...  
Keyword(s):  
Schiff Base ◽  
Chemical Structure ◽  
Antimicrobial Activities ◽  
Ethylene Diamine ◽  
Chemical Characteristics ◽  
Gram Negative Bacteria ◽  
Pharmacological Effects ◽  
Physico Chemical ◽  
Anti Inflammatory ◽  
Inflammatory Effect

The paper presents the synthesis of a new complex combination of a Bis-Schiff base with Mn(II) ions with great potential for antimicrobial and anti-inflammatory activity. A new complex of the Salen-type ligand, 1-ethyl-salicylidene-bis-ethylene diamine was synthetized using Mn(II) ions. The chemical structure was confirmed through 1H-NMR and IR spectroscopy. The antimicrobial activities of the Bis-Schiff base and its complex were tested in comparison with Ampicillin, Chloramphenicol, Tetracycline, Ofloxacin and Nystatin. Those compounds were found to be active against Gram-positive or Gram-negative bacteria, and had an anti-inflammatory effect comparable to that of Indomethacin.

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