2020, Issue 66(70), Fasc. 1 (March)
Contents
pages 1- 8 Download
Adsorptive Performance of Hyper-Crosslinked Polymeric Resins Compared to Granular Activated Carbon for Toluene Vapours, under Static Conditions and in Humid Environment
ADELA-MARILENA BUBURUZAN, "Gheorghe Asachi" Technical University of Iași, Romania, "Cristofor Simionescu" Faculty of Chemical Engineering and Environmental Protection, adelahaleta@tuiasi.ro
pages 9 - 20 Download
Abstract
The purpose of this study is to evaluate the adsorptive
performance of two hyper-crosslinked polymeric resins, MN 202 and MN 250 for
toluene vapours, under static conditions. All experiments were performed in
comparison with toluene vapours adsorption on GAC-AC 20. Since the humidity
is one of the crucial parameters that dictate the efficiency of the
adsorption process, the influence of relative humidity on the toluene vapour
retention efficiency at different concentrations in system was considered.
The results included in this study show that the adsorptive performance
recorded by MN 202 and MN 250 are very closely to those recorded by AC 20.
Moreover, in the humid conditions, the polymeric adsorbents MN 202 and MN
250 behave much better than AC 20. Thus, the adsorption capacity of AC 20
decreased by 80% when the relative humidity in system increased from 0% to
97%, while adsorption capacities of MN 202 and MN 250 decreased with 40% and
respectively 50%.
Keywords: adsorption; toluene; VOCs; hyper-crosslinked
polymeric resins; relative humidity; humid environment.
Empirical Modelling for the Kinetic of the Natural and Artificial Dehydration Process for Apples and Grapes
CLAUDIA COBZARU, "Gheorghe Asachi" Technical University of Iași,
Romania, "Cristofor Simionescu" Faculty of Chemical Engineering and
Environmental Protection
ROXANA ŞTEFAN, "Gheorghe Asachi" Technical
University of Iași, Romania, "Cristofor Simionescu" Faculty of Chemical
Engineering and Environmental Protection
GENOVEVA BORDEIANU, Tehnical
College "Danubiana" Roman, Neamţ, Romania
GABRIELA ANTOANETA APOSTOLESCU,
"Gheorghe Asachi" Technical University of Iași, Romania, "Cristofor
Simionescu" Faculty of Chemical Engineering and Environmental Protection
RAMONA-ELENA TĂTARU-FĂRMUȘ, "Gheorghe Asachi" Technical University of Iași,
Romania, "Cristofor Simionescu" Faculty of Chemical Engineering and
Environmental Protection
NICOLAE APOSTOLESCU, "Gheorghe Asachi" Technical
University of Iași, Romania, "Cristofor Simionescu" Faculty of Chemical
Engineering and Environmental Protection
CORINA CERNĂTESCU,
"Gheorghe
Asachi" Technical University of Iași, Romania, "Cristofor Simionescu"
Faculty of Chemical Engineering and Environmental Protection,
ccernat@tuiasi.ro
pages 21 - 30 Download
Abstract
In this paper the artificial and natural dehydration process
kinetic for apples and grapes has been studied. Experimental data show that
natural dehydration has the disadvantages of being a slow and dragging
process, but also the benefits of preserving flavour, maintaining nutrients
and long-lasting conservation due to the low moisture content of 5-10%.
Instead, the artificial dehydration is faster but not economical, with the
possibility of caramelizing some ingredients due to the contact with the
intense heat source. Also, through modelling of kinetics the natural and
artificial dehydration process with the Table Curve 2D program has been
obtained an empirical model that successfully approximates the actual
moisture variation for the products undergoing the dehydration process at
different time values.
Keywords: artificial and natural dehydration;
apples; grapes; mathematic model.
A Review on the Optimization of Lipopeptides Production
LARISA-MARIA PETRILA, "Gheorghe Asachi" Technical University of Iași,
Romania, "Cristofor Simionescu" Faculty of Chemical Engineering and
Environmental Protection
ALEXANDRA CRISTINA BLAGA, "Gheorghe Asachi"
Technical University of Iași, Romania, "Cristofor Simionescu" Faculty of
Chemical Engineering and Environmental Protection,
acblaga@tuiasi.ro
FRANCOIS KRIER,
UMR TransfrontalièreBioEcoAgro N° 1158, Univ. Lille, INRAE, Univ. Liège,
UPJV, YNCREA, Univ. Artois, Univ. Littoral Côte d’Opale, ICV – Institut
Charles Viollette, F-59000 Lille, France
pages 31 - 49 Download
Abstract. Lipopeptides are a class of compounds produced by
microorganisms, which play a key role in many industries, being used in
food, cosmetic and pharmaceutical applications. Their production through
biosynthesis is influenced by a large number of factors, including the
microorganism characteristics, the operation parameters and the equipment
used for separation and purification. The large number of parameters that
can affect the biosynthesis makes the process optimization a complex task.
This paper aims to present several examples of parameter optimization for
the production of lipopeptides through biosynthesis.
Keywords:
lipopeptide; biosynthesis; optimization.
Obtaining, Rheological Characterization and Thermal Degradation of Some New Medicinal Creams
MIHAELA IVANCIA, Ion Ionescu de la Brad" University of Agricultural
Sciences and Veterinary Medicine of Iași, Romania Faculty of Animal Sciences
MARICEL DANU, "Gheorghe Asachi" Technical University of Iași, Romania,
"Cristofor Simionescu" Faculty of Chemical Engineering and Environmental
Protection
GABRIELA LISĂ, "Gheorghe Asachi" Technical University of Iași,
Romania, "Cristofor Simionescu" Faculty of Chemical Engineering and
Environmental Protection
ANCA MIHAELA MOCANU, "Gheorghe Asachi" Technical
University of Iași, Romania, "Cristofor Simionescu" Faculty of Chemical
Engineering and Environmental Protection,
ancamocanu@tuiasi.ro
pages 51 - 61 Download
Abstract
In this work was to prepared, reological characterized and
thermical degradation of creams with imidazoline and pyrazole derivatives
with various pharmacological actions. The newly obtained creams including
active substances were submitted to rheological tests by means of a modular
rheometer to made evident their properties in time and also under the
influence of certain parameters. The TG, DTG and DTA thermal analysis study
revealed the temperature range where the creams containing the active
components are thermally stable and properly used as well as the degree of
embedding of the active principle.
Keywords: imidazoline and pyrazole
derivatives; rheological tests; thermal analysis.
Emulsions of Beeswax - Lavender Oil: Characteristics and Preliminary Analysis for Use in Manufacturing of Value-Added Textiles
CARMEN ZAHARIA, "Gheorghe Asachi" Technical University of Iași, Romania,
"Cristofor Simionescu" Faculty of Chemical Engineering and Environmental
Protection, czah@ch.tuiasi.ro
ANGELA DĂNILĂ, "Gheorghe Asachi" Technical University of Iași, Romania,
Faculty of Industrial Design and Business Management
EMIL IOAN
MUREȘAN, "Gheorghe Asachi" Technical University of Iași, Romania, "Cristofor
Simionescu" Faculty of Chemical Engineering and Environmental Protection
DANIELA ȘUTEU, "Gheorghe Asachi" Technical University of Iași, Romania,
"Cristofor Simionescu" Faculty of Chemical Engineering and Environmental
Protection
pages 63 - 74 Download
Abstract
This research work presents the results of preliminary
preparation and characterization of a few emulsions based on natural wax
(beeswax) and lavender essential oil using some quality characteristics
(i.e. pH, density, acidity index, peroxide index, total content of
conjugated dienes and trienes, polyphenols, flavonoids and fatty acids) as
well as sensory analysis considering as selected criteria the following
ones: adherence, degree of emulsifying, uniformity, consistence and smell.
These researches permitted the recommendation of the most corresponding
emulsion for impregnation on textile material (e.g. cotton or viscose
support) and preliminary details on the textile product design recommended
for manufacturing of added-value textile material.
Keywords: emulsion;
in-time stability; physical-chemical quality indicators; sensory analysis;
textile impregnation.