Diese Arbeit beschreibt wie mit physikalischen Methoden die Glukosekonzentration gemessen werden ... more Diese Arbeit beschreibt wie mit physikalischen Methoden die Glukosekonzentration gemessen werden kann. Die Infrarot-Spektroskopie bietet eine Möglichkeit da die Energie der meisten Molekülschwingungen Photonenenergien im infraroten Spektralbereich entspricht. Hier zeigen Glukosemoleküle charakteristische Absorptionsspektren, die mit spektroskopischen Methoden gemessen werden. Um nicht invasiv zu messen, wurde eine photoakustische Messmethode gewählt. Die Grundidee ist, dass die durch Licht angeregten Moleküle ihre Anregungsenergie teilweise in Form von Wärme abgeben. Da die anregende Strahlung intensitätsmoduliert ist, wird auch die Wärmeentwicklung periodisch verlaufen wodurch periodische Volumenänderungen hervorgerufen werden, die eine Druckwelle erzeugen, die sich durch empfindliche Mikrofone oder Schallwandler erfassen lässt. So kann im MIR auf Grund der hohen Spezifizität, der Glukosegehalt mit sehr hoher Genauigkeit bestimmt werden. Die Wellenlänge der Glukoseabsorptionsbanden...
7-th INTERNATIONAL CONFERENCE: Information Systems and Technology Innovations: the New Paradigm for a Smarter Economy, 2016
Linux containers-compartmentalized and isolated application environments-offer utility, scalabili... more Linux containers-compartmentalized and isolated application environments-offer utility, scalability, and low development and implementation costs. Such savings and functionality allow organizations to grow and adapt their IT infrastructure. This paper provides a short description on container technology, two of the main approaches LXC and LXD, how it works, and its benefits while being applied in the Academic Network of Albania.
Albanian Food Law Nr. 9863 dt. 28.01.2008 defines the requirements for all the food business oper... more Albanian Food Law Nr. 9863 dt. 28.01.2008 defines the requirements for all the food business operators (ex-cept primary one) to have in place a self-control sys-tem based on HACCP methodology. In Albania there is not any official regulation yet, which can define clearly and systematically what the Albanian food business operators should document and imple-ment referring to the HACCP model. So to be on the safe side most of the food operators are asking for con-sultancy and certification against ISO 22000:2005. But those which are certified and more others which plan to do it perceive this model as quite complex for them. This paper reveals other FSMS for the food business operators to apply except ISO 22000:2005, and finds out if those systems are really less complicated and more suitable for them. The methodology used are in-quiries, interviews with food business operators, food safety literature, results, inductive and deductive type of results presented in narrative and tabular w...
, was built upon the success of the past conferences. This conference has consistently aimed to s... more , was built upon the success of the past conferences. This conference has consistently aimed to strengthen and expand further the network of collaboration between the national and international academic institutions, and also the companies in the IT sector, government agencies and other main stakeholders in the IT environment. Past conferences have always been focused in recent trends of technology and innovations, offering an important contribution to all the actors involved in this environment. In this context, our main topic of ISTI 2016 is Smart Economy, which represents the intersection between the economy, information technology and Smart Cities. Thus, primary goal of ISTI 2016 is mainly oriented to how a Smart City can be used as a substantial economic driver. Exploring new paths and translating them into added value for the environment and our society in general is one of the main goals of the technologies and services created as part of the Smart Economy. In this conference there are approximately 240 authors from different countries of the region and beyond, including Sweden,
ABSTRACT The commercial methomyl adsorptive properties on four montmorillonite-rich Albanian natu... more ABSTRACT The commercial methomyl adsorptive properties on four montmorillonite-rich Albanian natural clay sorts have been investigated, aiming the selective removal of hazardous organic pollutants in pesticides contaminated waters. Three methomyl concentration 0.200 mg/ml, 0.400 mg/ml and 0.600 mg/ml at 25 °C are employed to study the adsorption dependence on the pesticide concentration for each natural clay type. The adsorption time evolution in each case is studied for a period of 72 hours. Within 48 h, the adsorption pathway shows in all cases a Freundlich-type adsorption isotherm. Beyond this time, desorption and hydrolysis strongly disadvantage the overall adsorption process, especially observable a low concentrations. The increase of the methomyl concentration disfavors the desorption step for the natural clays of Brari (41°21'14.49"N; 19°50'17.74"E), Currila (41°19'16.29"N; 19°25'51.92"E) and Dardha (40°31'16.59"N; 20°49'33.69"E). The methomyl desorption process was inevitable even at 0.600 mg/ml for the natural clays of Përrenjasi (41° 4'3.88"N; 20°33'2.33"E). Within 48 h, the natural clays of Brari, Currila and Dardha exhibit linear adsorbability increase with the concentration. At methomyl concentration of 0.600 mg/ml, within 24 h, the clays of Dardha and Përrenjasi reach the methomyl saturation of 1.471 mg/g and 1.956 mg/g respectively. The clays of Brari and Currila show longer saturation times followed by better methomyl retention. The clays of Dardha and Përrenjasi display shorter adsorption times, high adsorbability and low pesticide retention times. All these results are prone of study of the methomyl recovery from contaminated ground waters.
ABSTRACT Abstract Inspired from the physico-chemical properties of supercritical CO2 and its exte... more ABSTRACT Abstract Inspired from the physico-chemical properties of supercritical CO2 and its extended use as an attractive continuous phase for different applications, we employed in our study supercritical CO2 as a reaction medium for a variety of reactions between inorganic species including fairly nonpolar molecular compounds as well as polar, ionic crystalline compounds or merely solid elements. In this course of investigation aiming to obtain mixed valence compounds of mercury from the system Hg2Cl2-HgO in supercritical CO2 using a self made lab-scale system at 200°C, 200 bar for one week, instead of the desired product, HgCO3*2HgO (mercury carbonate oxide) was obtained, as mixture of educts and partly non reacted HgO. The same result was confirmed by a later reaction between pure HgO and supercritical CO2, although our objective was the formation of mercury carbonate. This revealed the possibility of the synthesis of HgCO3*2HgO even without the presence of water as reported by Bilinski et al. and Schlyapnikov et al. in similar syntheses under atmospheric and higher CO2 pressures. The presence of small amounts of water in the system Hg2Cl2-HgO-supercritical CO2, under 200°C and 200 bar, yielded the mineral terlinguaite (Hg4O2Cl2) and neither mercury carbonate nor mercury carbonate oxide was formed. Repeating the process under the same conditions but in absence of CO2, brought to the synthesis of same terlinguaite, showing no influence of the of supercritical CO2 presence in the yield of terlinguaite. The techniques used for the identification of the compounds in solid state were X-Ray diffraction, Raman spectroscopy and IR spectroscopy. The modern strategy to decrease the CO2 emissions is based on the injections of CO2, generally in supercritical state directly into underground geological formations in form of deposits. These underground deposits might get in contact with earth formations containing the above mentioned systems, leading therefore, to the permanent fixation of CO2 (geo-sequestration) in form of carbonate-oxides due to processes which occur naturally over many years at lower temperatures, or to no CO2 capturing at all if water is present, due to the higher thermodynamic stability of terlinguaite.
The thermal behavior of mixed valence crystalline In5Ch5Cl (Ch = S, Se) is studied by high temper... more The thermal behavior of mixed valence crystalline In5Ch5Cl (Ch = S, Se) is studied by high temperature powder XRD and DTA measurements. Both isostructural compounds, In5S5Cl and In5Se5Cl crystallize in the monoclinic primitive cell and space group P21/m. The high temperature XRD powder patterns recorded within 296-873 K for In5S5Cl exhibit a linear variation of lattice constant c characterized by a thermal expansion coefficient of α= 1.4(3) x 10-5 K-1 and non linear behavior for the lattices a and b with respective expansion coefficients of α= 1.66(4) x10-5 K-1 and 1.31(3) x 10-5 K-1. Unlike In5S5Cl, the compound In5Se5Cl exhibits linear elongations along a and b directions with αa = 1.5(3) x 10-5 K-1, αb = 1.2(2) x 10-5 K-1
and a nonlinear expansion along c direction, with a mean coefficient of α= 5.4(3) x 10-6 K-1. The DTA of both samples reveal incongruent melting. At 873 K, the powder patterns confirm the full decomposition to In2S3 and In2Se3 and other binary compounds. By the combination of these techniques
a decomposition mechanism is proposed for each of them.
Albanian Food Law Nr. 9863 dt. 28.01.2008 defines the requirements for all the food business oper... more Albanian Food Law Nr. 9863 dt. 28.01.2008 defines the requirements for all the food business operators (except primary one) to have in place a self-control system based on HACCP methodology.
In the course of selective removal of pesticides from contaminated waters we investigated the ads... more In the course of selective removal of pesticides from contaminated waters we investigated the adsorptive properties of natural and H2SO4-activated Prrenjasi-clay (41°4'7.2048"N; 20°33'4.5288"E) toward two metribuzin aqueous solutions. Metribuzin concentrations of 0.200 g/l and 0.400 g/l at 23°C and a clay fraction 0-0.250 mm were considered in this study. The adsorption evolution is studied for a period of 72 hours in each case. For a contact time of 24 h and a metribuzin concentration of 0.200 g/l, the initial recorded values for the natural and activated clay were 0.215 and 0.185 mg/g. Within 48 h the adsorption increases up to 126% and 163% respectively, followed by a further increase of 26.5% and 29.2% at 72 h. The metribuzin concentration increase to 0.400 g/l enhances the initial adsorption (24 h) of this clay up to 1.356 mg/g in both cases. At such concentration, the max. adsorbed amount recorded in each case is 1.512 and 1.732 mg/g respectively corresponding to the metribuzin-clay contact time of 48 h. Beyond this time, desorption and catalytic metribuzin degradation of 6.5% and 10.2% strongly disadvantage the overall adsorption process leading considerable deviations from Langmuir-like adsorption behavior.
The distinctive adsorptive properties of clays are very appealing for the removal of organic poll... more The distinctive adsorptive properties of clays are very appealing for the removal of organic pollutants from contaminated waters. Taking advantage of this property, we investigated the adsorptive capacities of two natural and H2SO4 activated Albanian clays toward metribuzine. A 0.200 g/l metribuzine aqueous solution at 25 °C placed in contact upon stirring with the clays of Brari and Prrenjasi for a period of 72 h, exhibited significantly higher adsorption of the latter. For 24 h clay-pesticide solution contact time, natural Prrenjasi clay adsorbs up to 0.218 mg/g compared to 0.05 mg/g for natural Brari clay. Increases of the clay-pesticide solution contact time leads to enhanced adsorbed amounts for both clays. Within the time interval 48-72 h, the clay of Prrenjasi shows a steeper adsorption compared to Brari clay. The H2SO4 activation changes insignificantly the adsorptive properties of Prrenjasi clay, but enhances dramatically the adsorption behavior of Brari clay. Increasing the metribuzine concentration from 0.200 g/l to 0.400 g/l increases the adsorption capacity approx. 7 times for both activated clays. At such metribuzine concentration, activated Prrenjasi clay reaches the max. adsorption of 1.732 mg/g within 48 h of contact time compared to 0.636 mg/g exhibited by Brari clay for 72 h.
Diese Arbeit beschreibt wie mit physikalischen Methoden die Glukosekonzentration gemessen werden ... more Diese Arbeit beschreibt wie mit physikalischen Methoden die Glukosekonzentration gemessen werden kann. Die Infrarot-Spektroskopie bietet eine Möglichkeit da die Energie der meisten Molekülschwingungen Photonenenergien im infraroten Spektralbereich entspricht. Hier zeigen Glukosemoleküle charakteristische Absorptionsspektren, die mit spektroskopischen Methoden gemessen werden. Um nicht invasiv zu messen, wurde eine photoakustische Messmethode gewählt. Die Grundidee ist, dass die durch Licht angeregten Moleküle ihre Anregungsenergie teilweise in Form von Wärme abgeben. Da die anregende Strahlung intensitätsmoduliert ist, wird auch die Wärmeentwicklung periodisch verlaufen wodurch periodische Volumenänderungen hervorgerufen werden, die eine Druckwelle erzeugen, die sich durch empfindliche Mikrofone oder Schallwandler erfassen lässt. So kann im MIR auf Grund der hohen Spezifizität, der Glukosegehalt mit sehr hoher Genauigkeit bestimmt werden. Die Wellenlänge der Glukoseabsorptionsbanden...
7-th INTERNATIONAL CONFERENCE: Information Systems and Technology Innovations: the New Paradigm for a Smarter Economy, 2016
Linux containers-compartmentalized and isolated application environments-offer utility, scalabili... more Linux containers-compartmentalized and isolated application environments-offer utility, scalability, and low development and implementation costs. Such savings and functionality allow organizations to grow and adapt their IT infrastructure. This paper provides a short description on container technology, two of the main approaches LXC and LXD, how it works, and its benefits while being applied in the Academic Network of Albania.
Albanian Food Law Nr. 9863 dt. 28.01.2008 defines the requirements for all the food business oper... more Albanian Food Law Nr. 9863 dt. 28.01.2008 defines the requirements for all the food business operators (ex-cept primary one) to have in place a self-control sys-tem based on HACCP methodology. In Albania there is not any official regulation yet, which can define clearly and systematically what the Albanian food business operators should document and imple-ment referring to the HACCP model. So to be on the safe side most of the food operators are asking for con-sultancy and certification against ISO 22000:2005. But those which are certified and more others which plan to do it perceive this model as quite complex for them. This paper reveals other FSMS for the food business operators to apply except ISO 22000:2005, and finds out if those systems are really less complicated and more suitable for them. The methodology used are in-quiries, interviews with food business operators, food safety literature, results, inductive and deductive type of results presented in narrative and tabular w...
, was built upon the success of the past conferences. This conference has consistently aimed to s... more , was built upon the success of the past conferences. This conference has consistently aimed to strengthen and expand further the network of collaboration between the national and international academic institutions, and also the companies in the IT sector, government agencies and other main stakeholders in the IT environment. Past conferences have always been focused in recent trends of technology and innovations, offering an important contribution to all the actors involved in this environment. In this context, our main topic of ISTI 2016 is Smart Economy, which represents the intersection between the economy, information technology and Smart Cities. Thus, primary goal of ISTI 2016 is mainly oriented to how a Smart City can be used as a substantial economic driver. Exploring new paths and translating them into added value for the environment and our society in general is one of the main goals of the technologies and services created as part of the Smart Economy. In this conference there are approximately 240 authors from different countries of the region and beyond, including Sweden,
ABSTRACT The commercial methomyl adsorptive properties on four montmorillonite-rich Albanian natu... more ABSTRACT The commercial methomyl adsorptive properties on four montmorillonite-rich Albanian natural clay sorts have been investigated, aiming the selective removal of hazardous organic pollutants in pesticides contaminated waters. Three methomyl concentration 0.200 mg/ml, 0.400 mg/ml and 0.600 mg/ml at 25 °C are employed to study the adsorption dependence on the pesticide concentration for each natural clay type. The adsorption time evolution in each case is studied for a period of 72 hours. Within 48 h, the adsorption pathway shows in all cases a Freundlich-type adsorption isotherm. Beyond this time, desorption and hydrolysis strongly disadvantage the overall adsorption process, especially observable a low concentrations. The increase of the methomyl concentration disfavors the desorption step for the natural clays of Brari (41°21'14.49"N; 19°50'17.74"E), Currila (41°19'16.29"N; 19°25'51.92"E) and Dardha (40°31'16.59"N; 20°49'33.69"E). The methomyl desorption process was inevitable even at 0.600 mg/ml for the natural clays of Përrenjasi (41° 4'3.88"N; 20°33'2.33"E). Within 48 h, the natural clays of Brari, Currila and Dardha exhibit linear adsorbability increase with the concentration. At methomyl concentration of 0.600 mg/ml, within 24 h, the clays of Dardha and Përrenjasi reach the methomyl saturation of 1.471 mg/g and 1.956 mg/g respectively. The clays of Brari and Currila show longer saturation times followed by better methomyl retention. The clays of Dardha and Përrenjasi display shorter adsorption times, high adsorbability and low pesticide retention times. All these results are prone of study of the methomyl recovery from contaminated ground waters.
ABSTRACT Abstract Inspired from the physico-chemical properties of supercritical CO2 and its exte... more ABSTRACT Abstract Inspired from the physico-chemical properties of supercritical CO2 and its extended use as an attractive continuous phase for different applications, we employed in our study supercritical CO2 as a reaction medium for a variety of reactions between inorganic species including fairly nonpolar molecular compounds as well as polar, ionic crystalline compounds or merely solid elements. In this course of investigation aiming to obtain mixed valence compounds of mercury from the system Hg2Cl2-HgO in supercritical CO2 using a self made lab-scale system at 200°C, 200 bar for one week, instead of the desired product, HgCO3*2HgO (mercury carbonate oxide) was obtained, as mixture of educts and partly non reacted HgO. The same result was confirmed by a later reaction between pure HgO and supercritical CO2, although our objective was the formation of mercury carbonate. This revealed the possibility of the synthesis of HgCO3*2HgO even without the presence of water as reported by Bilinski et al. and Schlyapnikov et al. in similar syntheses under atmospheric and higher CO2 pressures. The presence of small amounts of water in the system Hg2Cl2-HgO-supercritical CO2, under 200°C and 200 bar, yielded the mineral terlinguaite (Hg4O2Cl2) and neither mercury carbonate nor mercury carbonate oxide was formed. Repeating the process under the same conditions but in absence of CO2, brought to the synthesis of same terlinguaite, showing no influence of the of supercritical CO2 presence in the yield of terlinguaite. The techniques used for the identification of the compounds in solid state were X-Ray diffraction, Raman spectroscopy and IR spectroscopy. The modern strategy to decrease the CO2 emissions is based on the injections of CO2, generally in supercritical state directly into underground geological formations in form of deposits. These underground deposits might get in contact with earth formations containing the above mentioned systems, leading therefore, to the permanent fixation of CO2 (geo-sequestration) in form of carbonate-oxides due to processes which occur naturally over many years at lower temperatures, or to no CO2 capturing at all if water is present, due to the higher thermodynamic stability of terlinguaite.
The thermal behavior of mixed valence crystalline In5Ch5Cl (Ch = S, Se) is studied by high temper... more The thermal behavior of mixed valence crystalline In5Ch5Cl (Ch = S, Se) is studied by high temperature powder XRD and DTA measurements. Both isostructural compounds, In5S5Cl and In5Se5Cl crystallize in the monoclinic primitive cell and space group P21/m. The high temperature XRD powder patterns recorded within 296-873 K for In5S5Cl exhibit a linear variation of lattice constant c characterized by a thermal expansion coefficient of α= 1.4(3) x 10-5 K-1 and non linear behavior for the lattices a and b with respective expansion coefficients of α= 1.66(4) x10-5 K-1 and 1.31(3) x 10-5 K-1. Unlike In5S5Cl, the compound In5Se5Cl exhibits linear elongations along a and b directions with αa = 1.5(3) x 10-5 K-1, αb = 1.2(2) x 10-5 K-1
and a nonlinear expansion along c direction, with a mean coefficient of α= 5.4(3) x 10-6 K-1. The DTA of both samples reveal incongruent melting. At 873 K, the powder patterns confirm the full decomposition to In2S3 and In2Se3 and other binary compounds. By the combination of these techniques
a decomposition mechanism is proposed for each of them.
Albanian Food Law Nr. 9863 dt. 28.01.2008 defines the requirements for all the food business oper... more Albanian Food Law Nr. 9863 dt. 28.01.2008 defines the requirements for all the food business operators (except primary one) to have in place a self-control system based on HACCP methodology.
In the course of selective removal of pesticides from contaminated waters we investigated the ads... more In the course of selective removal of pesticides from contaminated waters we investigated the adsorptive properties of natural and H2SO4-activated Prrenjasi-clay (41°4'7.2048"N; 20°33'4.5288"E) toward two metribuzin aqueous solutions. Metribuzin concentrations of 0.200 g/l and 0.400 g/l at 23°C and a clay fraction 0-0.250 mm were considered in this study. The adsorption evolution is studied for a period of 72 hours in each case. For a contact time of 24 h and a metribuzin concentration of 0.200 g/l, the initial recorded values for the natural and activated clay were 0.215 and 0.185 mg/g. Within 48 h the adsorption increases up to 126% and 163% respectively, followed by a further increase of 26.5% and 29.2% at 72 h. The metribuzin concentration increase to 0.400 g/l enhances the initial adsorption (24 h) of this clay up to 1.356 mg/g in both cases. At such concentration, the max. adsorbed amount recorded in each case is 1.512 and 1.732 mg/g respectively corresponding to the metribuzin-clay contact time of 48 h. Beyond this time, desorption and catalytic metribuzin degradation of 6.5% and 10.2% strongly disadvantage the overall adsorption process leading considerable deviations from Langmuir-like adsorption behavior.
The distinctive adsorptive properties of clays are very appealing for the removal of organic poll... more The distinctive adsorptive properties of clays are very appealing for the removal of organic pollutants from contaminated waters. Taking advantage of this property, we investigated the adsorptive capacities of two natural and H2SO4 activated Albanian clays toward metribuzine. A 0.200 g/l metribuzine aqueous solution at 25 °C placed in contact upon stirring with the clays of Brari and Prrenjasi for a period of 72 h, exhibited significantly higher adsorption of the latter. For 24 h clay-pesticide solution contact time, natural Prrenjasi clay adsorbs up to 0.218 mg/g compared to 0.05 mg/g for natural Brari clay. Increases of the clay-pesticide solution contact time leads to enhanced adsorbed amounts for both clays. Within the time interval 48-72 h, the clay of Prrenjasi shows a steeper adsorption compared to Brari clay. The H2SO4 activation changes insignificantly the adsorptive properties of Prrenjasi clay, but enhances dramatically the adsorption behavior of Brari clay. Increasing the metribuzine concentration from 0.200 g/l to 0.400 g/l increases the adsorption capacity approx. 7 times for both activated clays. At such metribuzine concentration, activated Prrenjasi clay reaches the max. adsorption of 1.732 mg/g within 48 h of contact time compared to 0.636 mg/g exhibited by Brari clay for 72 h.
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Papers by Arjan Xhelaj
and a nonlinear expansion along c direction, with a mean coefficient of α= 5.4(3) x 10-6 K-1. The DTA of both samples reveal incongruent melting. At 873 K, the powder patterns confirm the full decomposition to In2S3 and In2Se3 and other binary compounds. By the combination of these techniques
a decomposition mechanism is proposed for each of them.
and a nonlinear expansion along c direction, with a mean coefficient of α= 5.4(3) x 10-6 K-1. The DTA of both samples reveal incongruent melting. At 873 K, the powder patterns confirm the full decomposition to In2S3 and In2Se3 and other binary compounds. By the combination of these techniques
a decomposition mechanism is proposed for each of them.