Concept of cleaner production in Vojvodina

The Autonomous Province of Vojvodina is an autonomous province in Serbia, containing about 27% of its total population according to the 2002 Census. It is located in the northern part of the country, in the Pannonia plain. The importance of sector of the environment protection becomes even larger and observable, especially with respect of the strategic determination of Government of the AP of Vojvodina, the Republic of Serbia on the association with the European economic area (EEA) and joining with the states – members of the European Union (EU). Restitution of the concept of the cleaner production (CP) significantly helps to companies and the responsible persons (especially in the domain of industry) to harmonize their business activities with law demands concerning the environment protection, as well as to improve their processes and the process sequences. This makes a starting base for the obtaining of the integrated license for the installations that are included in a list of installations that have to obtain an integrated licenses (some 250 installations), on the basis of the Law on the integrated prevention and control of pollution of Vojvodina, the Republic of Serbia, for which the dead point is the year 2015.     

Raman spectra of micellar casein powders prepared with wet blending of glycomacropeptide and micellar casein concentrate

Understanding the molecular properties and interactions of components within high-protein dairy powders is important in predicting rehydration performance. Raman spectroscopy was used to generate molecular information which provided insights into interactions between caseins in micellar casein concentrate (MCC) powder formulated with varying proportions of glycomacropeptide (GMP). The Raman bands showed intense peaks at 1446 to 1476 cm⁻¹ (due to CH₂ vibration) and 1653 to 1668 cm⁻¹ (due to C=O of Amide I and C=C bond) in MCC powder samples blended with GMP. Enhanced rehydration characteristics of MCC powder containing GMP matched with these differences in Raman peak intensity.     

钇-90微球治疗肝脏恶性肿瘤的术前肝血管评估 ——钇-90微球放射栓塞系列回顾（三）

【摘要】 钇-90（90Y）放射栓塞的潜在风险是在灌注微球过程中意外发生非靶血管栓塞。因此，术前采用肝动脉造影的方法来仔细确认有无潜在风险的动脉和血管交通尤其重要。完整的术前肝血管评估包括选择性肝动脉造影、预防性栓塞有导致90Y微球异位栓塞风险的动脉和确定继发于肿瘤病理性动静脉瘘产生的肝肺分流。本文将讨论90Y栓塞治疗过程中有可能引起非靶血管栓塞的相关动脉解剖以及如何评估这些血管的风险，预防非靶血管栓塞发生的方法。
     

Festlegung einer Jahresarbeitszeitverteilung durch Optimierung von Schichtplänen

Zusammenfassung Es wird ein Verfahren zur kostenminimalen Festlegung einer kapazitätsorientierten Jahresarbeitszeitverteilung für den Produktionsbereich vorgestellt. Dazu wird auf Basis einer vorgegebenen Menge von Schichtplänen eine simultane Auswahl- und Reihenfolgeplanung durchgeführt, die die Jahresarbeitszeitverteilung optimiert. Im Gegensatz zu den gängigen Verfahren zur Jahresarbeitszeitplanung können bei dieser Vorgehensweise die durch die Schichtpläne auferlegten Arbeitszeitrestriktionen sowie die damit verbundenen Kosten im Detail berücksichtigt werden. Der Einfluß planungsrelevanter Parameter auf die resultierende Jahresarbeitszeitverteilung wird ausführlich diskutiert.     

Study of the influence of processing parameters on the production of carboxymethylchitin

Carboxymethylchitin was prepared at different reaction temperatures and from alkali chitin with different concentrations of alkali. Properties of the product were studied. Alkali chitin were prepared using freshly prepared sodium hydroxide of 45, 50, 55, 60 and 65% (w/w) concentration and carboxymethylated using monochloroacetic acid at controlled (35-40 °C) and uncontrolled (30-80 °C) temperature conditions. Molecular weight, viscosity, degree of deacetylation, etc. of the resultant product, i.e. carboxymethylchitin were determined. It was found that the reaction temperature has a profound influence on the property of the product than alkali concentration. A hygroscopic and completely water-soluble product was formed. Optimum conditions for the production of carboxymethylchitin were found to be 60% NaOH concentration and at 35-40 °C reaction temperature. At these conditions, it was obtained with a molecular weight of 4.11×10⁶ Da, viscosity 1926 cP and degree of deacetylation 45.02%.     

S-Lay pipe laying optimization using specialized PSO method

The paper deals with the optimization of the S-Lay submarine pipe-laying. The considered laying model is based on a nonlinear elastic beam model with elastic contact interactions with rigid structures of roller supports and the seabed, solved in the Abaqus software. The optimization problem is formulated so as to determine the main parameters of pipe-laying. In order to maximize the efficiency of the optimization procedure, a specialized Particle Swarm Optimization variant is developed. The introduced δ-PSO employs an additional displacement of agent positions, through which the optimization is directed towards solutions based on offshore engineering practice. Two different cases of submarine pipe laying were used for testing. In these tests, the specialized PSO was compared to standard PSO and Mesh Adaptive Direct Search, which it both outperformed. The δ-PSO specialization is easy to implement in PSO or other swarm intelligence methods, and hopefully can provide similar improvements in other applications.     

Structure and Disorder in Squaraine–C60 Organic Solar Cells: A Theoretical Description of Molecular Packing and Electronic Coupling at the Donor–Acceptor Interface

Organic solar cells based on the combination of squaraine dyes (as electron donors) and fullerenes (as electron acceptors) have recently garnered much attention. Here, molecular dynamics simulations are carried out to investigate the evolution of a squaraine–C₆₀ bilayer interface as a function of the orientation and order of the underlying squaraine layer. Electronic couplings between the main electronic states involved in exciton dissociation and charge (polaron pair) recombination are derived for donor–acceptor complexes extracted from the simulations. The results of the combined molecular‐dynamics?quantum‐mechanics approach provide insight into how the degree of molecular order and the dynamics at the interface impact the key processes involved in the photovoltaic effect.