Ileana Manciulea

• Transylvania University of Brașov

Although Open Educational Resources (OERs) and Massive Open On-line Courses (MOOCs) are more and more developed and available in European educational systems, there is a lack of MOOCs in the field of toxicology and environmental sciences. Starting from this fact, the “Learning Toxicology through Open Educational Resources – TOX-OER” project was gra...

The sudden shift from the lecture theatres and laboratories to a laptop or smart phone screen due to the restrictions caused by the pandemic 2020 crisis, changes the students’ way of working in the academic environment. The present paper investigated the engineering students’ perception of the changes occurred during this period. The investigation...

Abstract. Due to the lack of European Massive Open Online Courses (MOOCs) in the field of the Toxicology and the major differences in the styles of teaching and learning of this important subject in amongst various European life science-oriented institutions, the European Erasmus+ project “Learning Toxicology through Open Educational Resources (TOX...

Recycling the biodegradable waste by composting represents a sustainable solution for developing new ecological compost-type substrates, useful both as biofertilizers and as sorbents for the removal of heavy metals from wastewaters. By this paper we aim to present an overview of our studies related to using composted biomass from biodegradable wast...

The paper aims to present the sorption properties of two sorbent substrates (composts) prepared by aerobic fermentation from vegetables waste composted with beech sawdust (BR2) and beech ash (BC1) to be used for Cu²⁺ removal from wastewaters. The composts structures and surface properties were characterised in terms of active groups (FTIR), crystal...

In recent years, a lot of techniques for obtaining ZnO nanostructures were developed together with different methods for nanoparticles surface modification. Hence, the changing of particles chemical and physical properties improves their compatibility with different polymeric matrices leading to interesting, new practical applications of ZnO in var...

The paper presents the results on accelerated corrosion/erosion tests, of Thickness Insensitive Spectrally Selective paints, based on alumina matrix infiltrated with inorganic oxide pigments used in the solar-thermal energy conversion. The mechanism of the corrosion/erosion process is presented and discussed based on the polarization Tafel curves o...

The paper presents the results obtained when using two ketonic Mannich bases (BM1 and BM2) as corrosion inhibitors in saline (standard sea water-3.5% NaCl) for different types of steel, with various alloying elements. The corrosion experiments were performed by potentiodynamic polarization studies. Based on the polarization curves, the corrosion cu...

The characteristics of biomass used at Combined Heat and Power (CHP) plant Güssing (Austria) were determined over three samples taken from the wood chips, including proximate analysis: moisture, ash, cellulose and lignin content, and ultimate analysis: total organic carbon, concentration of H, S, N, and O, high and low heating value and FT-IR. Base...

Composting is nowadays an important and efficient process in sustainable organic waste management. Recycling process of biodegradable organic waste (animal and agriculture residues, sewage sludge, household refuse) by composting, also represents an ecological solution to synthesize new materials used as biofertilizers or adsorbents in wastewater tr...

Our research was focused on developing some new procedures to reduce the biodegradable wastes by composting. The aim of this study was to obtain and asses at laboratory scale the maturity of three compost samples of different proportion of vegetable waste, beech sawdust and sewage sludge by analyzing their FT-IR spectra and C/N ratio. The compostin...

The paper presents the results obtained when using one ketonic Mannich base BM (1-(2'-hydroxyphenyl)-3-(1- piperidinylamino)propan-1-one hydrochloride) as corrosion inhibitor in saline environment, for different types of carbon steels, with various alloying elements. The Mannich base was synthesized and used in corrosion experiments, in concentrati...

Among the biofuels produced nowadays in the world, biodiesel became more and more attractive thanks to its advantages compared with petroleum-based diesel: (a) reducing the dependence on petroleum; (b) reduction of most exhaust emissions; (c) biodegradability; (d) higher flash point, leading to safer handling and storage; (e) excellent lubricity. H...

It has been an increased interest in using sewage sludge as agricultural fertilizer and soil improvement material, especially as compost with biomass. This paper analyses five samples of composts from bio waste and sewage sludge, with various percentage of sludge, using the following parameters: pH, EC, carbohydrates content, enzymes content and C:...

The imminent decline of fossil fuel resources, on one hand and its high market prices and increased environmental awareness, on the other hand, made the production of alternatives fuels from renewable resources to race more and more importance. Biodiesel is a promising alternative substitute for diesel being environmental friendly due to its renewa...

The paper presents the results obtained when using Mannich bases (and derivatives) as corrosion inhibitors in saline environment, for different types of steels, with various alloying elements. The Mannich basis (ketonic combinations with naphtenic and nitrogen containing rings) were synthesized as such (polar) and as chlorhydrates (ionic) and used...

This paper presents the corrosion processes of steel samples with different composition, in aggressive corrosion solutions containing chloride ions. The inhibition capacity of two new Mannich basis: 2-aceto-4-morpholylmetyl-l-naphtol (BM1) and 1-(2′-hydroxynaphtyl)-3-(4-morpholyl)-l-propanone (BM2) was tested and compared. The corrosion tests were...

Wood has been used as an engineering material because it is low in cost, renewable and strong and it requires low processing energy. Wood has many excellent properties that result from its exceptional combination of microstructural, ultrastructural and molecular features. The main drawback is its dimensional instability in the presence of moisture,...

The synergistic combination of polymers and inorganic compounds via sol-gel process has attracted great attention, by manipulating structure at molecular level, for developing new materials with desired properties. These new hybrid materials could have a controllable combination of the benefits of polymers (flexibility, toughness, ease of processin...

The paper presents research concerning the synthesis and characterization of some new nanocomposite used as wood coating nanomaterials, consisting of a hybrid of organic (functionalized acrylic copolymers with iron lignosulfonate) and inorganic nanomaterials (ZnO nanoparticles obtained by sol-gel process). The presence of acrylic copolymers in wate...

New eco-adhesives for wood industry, with advanced properties, were synthesized by polycondensation of lignocellulosic residues: aluminum, calcium and iron lignosulfonates, as partial substitutes (due to their chemical structure) for toxic monomers phenol and formaldehyde. The improvements achieved by using the lignosulfonates consist on decrease i...

Organic-inorganic hybrid materials are very interesting for several applications thanks to their properties based on the synergistic combination of different components. The paper presents some contributions on synthesis and characterization of new coating nanomaterials based on combinations of alumina nanoparticles with functionalized acrylic poly...

A series of new N-aminomethylation compounds has been obtained from 5-phenyl-1,3,4-oxadiazole-2-thione through reaction with formaldehyde and less common aliphatic and aromatic amines. The conformational isomers of 5-(5phenyl-2-thioxo-1,3,4-oxadiazole-3-methylamino)isophthalate have been investigated using the STO-2G basis set. Four minimum energy...

Lignosulfonates, derivatives of lignin, posses a reactive chemical potential and can be used as reactants in copolymerization of acrylic monomers. The paper presents the study on graft copolymerization of calcium lignosulfonate with acrylonitrile. The obtained copolymer presents biocide properties and can be used as wood preservation agent. © 2006,...

New 1,2,4-triazole-3-thiones and 1,2,4-triazole-3-ones bearing a 2-thienylmethyl moiety in position 5 have been synthesized through the cyclization in the presence of aqueous KOH of the corresponding 1-(2-thienylacetyl)thiosemicarbazides and 1-(2-thienylacetyl)semicarbazides, respectively. Potassium N′-(2-thienylacetyl)hydrazinecarbodithioate led t...

Condensation of 2-thienylacetic hydrazide 1 with alkoxy-snbstituted aromatic aldehydes has led to the corresponding hydrazone derivatives 3a-e, Addition of the aforementioned hydrazide to various isocyanates and isothiocyanates gave the related semicarbazides 4a-f and thiosemicarbazides 5a-c, respectively. Treatment of hydrazide 1 with carbon sulfi...

The need for processing solid urban and agro-industrial wastes is in agreement with the demands of the society sustainable development. The paper presents aspects regarding some of the chemical and physical aspects of the composting process. Effective utilization of waste materials biodegraded by composting assumes added significance. The optimum c...

Twenty analogs of chalcones have been prepared from the Claisen-type condensation of 2-acetylbenzimidazole with variously substituted aromatic aldehydes in the presence of catalytic amounts of piperidine.

The condensation reaction between 2-thienylacetic hydrazide and several aromatic aldehydes has been investigated. The resulting ten N-arylidene hydrazides have been characterized by elemental analysis, IR and NMR spectroscopy.

A series of Mannich bases derived from 5,6-dimethylbenzimidazole has been synthesized through direct aminomethylation.

Municipal waste is a growing concern in the world through the large quantity produced every year, the environmental problems and the costs of their storage. Composting is a technique frequently used to recycle a large variety of organic by-products transforming them into fertilisers useful for the soil. Monitoring different physical-chemical parame...

The synergistic combination of polymers and inorganic compounds via sol-gel process has attracted great attention, by manipulating structure at molecular level, for developing new materials with desired properties. These new hybrid materials could have a controllable combination of the benefits of polymers (flexibility, toughness, ease of processin...