Two-photon state selection and angular momentum polarization probed by velocity map imaging: Application to H atom photofragment angular distributions from the photodissociation of two-photon state selected HCl and HBr

A formalism for calculating the angular momentum polarization of an atom or a molecule following two-photon excitation of a J-selected state is presented. This formalism is used to interpret the H atom photofragment angular distributions from single-photon dissociation of two-photon rovibronically state selected HCl and HBr prepared via a Q-branch transition. By comparison of the angular distributions measured using the velocity map imaging technique with the theoretical model it is shown that single-photon dissociation of two-photon prepared states can be used for pathway identification, allowing for the identification of the virtual state symmetry in the two-photon absorption and/or the symmetry of the dissociative state. It is also shown that under conditions of excitation with circularly polarized light, or for excitation via non-Q-branch transitions with linearly polarized light the angular momentum polarization is independent of the dynamics of the two-photon transition and analytically computable.©2004 American Institute of Physics

Variation of Mean Seasonal Discharges in the Miletin River Basin (Moldavian Plain, Romania)

The hydrographic basin of the Miletin River is situated in the southeast of Europe, in a transitional temperate-continental climate, with considerable variations in the regime of precipitations. The purpose of this study is the spatial and temporal analysis of the mean seasonal discharges, meant to underline the need of implementing regulation projects for the Miletin stream. Furthermore, there are only a few specialized works on this hydrographic basin. The mean seasonal runoff presents significant seasonal and multiannual variations, caused by the high frequency of torrentiality, which characterizes the climate of the Miletin River area. Data from the rainfall stations of Nicolae Balcescu, Chiscareni, and Halceni, as well as from the hydrometric stations of Nicolae Balcescu, Sipote, and Halceni- downstream, respectively, were used. Unlike the stations with a natural runoff regime (Nicolae Balcescu, within the upper basin, Sipote within the middle basin, respectively), for Halceni-downstream (on the lower stream), the artificial runoff underlines a weak correlation with the rainfall regime. The data rows regard periods of 33-59 years, enough to conduct statistical analyses. Data from Halceni- downstream were analyzed, too, though the variables that characterize the hydrologic and rainfall regime within this region concern only 18 years. In the Miletin hydrographic basin, low and high discharge oscillations occur in all the four seasons. This characteristic is very different from those of the great hydrographic arteries that cross the east of Romania: Pruth and Siret

Preliminary Monitoring of Physico-Chemical Parameters of Water Wells from the Village of Bivolari (The Moldavian Plain)

The main objective of the paper is focused on water quality research in the village of Bivolari, Iasi County. The Bivolari settlement is situated in the Prut meadow and develops along the road connecting Iasi and Stefanesti. The research done in this paper starts from the collection of data on water pH, water LDO (oxygen concentration), CDC (dissolved salt content) and water temperature. The parameters were measured for 7 months using the HACH-LANGE multiparameter of the Geoarchaeology Laboratory at Alexandru Ioan Cuza University of Iasi (Inter-disciplinary Platform ArheoInvest). The study is structured in two sections: scientific substantiation and applicative research. The scientific substantiation part analyzes the water features in the context of the integrated management approach as well as an analysis of the quality aspects of the water supply. The applied research part required monthly field measurements in 50 fountains (without the winter season). The approached subject is is complex and up-to-date because the citizen is a priority for EU Member States (EUPAN, 2009): the aspect of “customer satisfaction” represents a capital priority. Finally, the database is structured into two categories: spatial information such as maps; tabular information attached to spatial data. The paper also follows the transition from the field of research into the field of application by presenting models of data representation, which are at the same time tools adapted to the practical needs. In order to achieve this goal, the concept of quality (both in terms of product - drinking water and local consumer) is defined and addressed in an integrated manner. Of the 50 wells monitored, only one had a water shortage in the last 10 years, and in two other cases there were problems with household waste and dead animals that damaged the water supply. Some fountains can dry at intervals of 3-4 years

The Role of Human Herpesvirus 6 Infection in Alzheimer’s Disease Pathogenicity—A Theoretical Mosaic

Alzheimer’s disease (AD), a neurodegenerative disorder generally affecting older adults, is the most common form of dementia worldwide. The disease is marked by severe cognitive and psychiatric decline and has dramatic personal and social consequences. Considerable time and resources are dedicated to the pursuit of a better understanding of disease mechanisms; however, the ultimate goal of obtaining a viable treatment option remains elusive. Neurodegenerative disease as an outcome of gene–environment interaction is a notion widely accepted today; a clear understanding of how external factors are involved in disease pathogenesis is missing, however. In the case of AD, significant effort has been invested in the study of viral pathogens and their role in disease mechanisms. The current scoping review focuses on the purported role HHV-6 plays in AD pathogenesis. First, early studies demonstrating evidence of HHV-6 cantonment in either post-mortem AD brain specimens or in peripheral blood samples of living AD patients are reviewed. Next, selected examples of possible mechanisms whereby viral infection can directly or indirectly contribute to AD pathogenesis are presented, such as autophagy dysregulation, the interaction between miR155 and HHV-6, and amyloid-beta as an antimicrobial peptide. Finally, closely related topics such as HHV-6 penetration in the CNS, HHV-6 involvement in neuroinflammation, and a brief discussion on HHV-6 epigenetics are examined.Medicine, Faculty ofNon UBCDermatology and Skin Science, Department ofReviewedFacultyResearche

Some Terpenes and Related Derivatives Synthesized in Cold Plasma Systems

The synthesis of bicyclo-[2.2.1]-heptane and bicyclo-[7.2.0]-undec-4-ene derivatives under cold plasma conditions are reported. The reaction systems involve gaseous mixtures at an interface with ice surfaces. The reactions are sensitive to the feed mixture and the ice trapped compounds

PHOTOELECTRON SPECTROSCOPY OF ALUMINUM DOPED BORON CLUSTERS

Author Institution: Brown University, Chemistry Department, 324 Brook Street,Providence, RI 02912, USAAnionic boron clusters have been shown to be planar or quasi-planar up to $B_{21}^{-}$ from a series of combined photoelectron spectroscopy and theoretical studies. All these boron clusters consist of a peripheral ring characterized by strong two-center-two-electron (2c-2e) B-B bonds and one or more interior atoms. The propensity for planarity is due to $\sigma$- and $\pi$-electron delocalizations throughout the molecular plane, giving rise to concepts of $\sigma$- and $\pi$-aromaticity. The quasi-planarity, on the other hand, can be mechanical in nature - the circumference of the cluster is too small to fit the inner atoms - even for doubly aromatic clusters. Two questions arise: firstly, can isoelectronic substitution by a single aluminum atom on the outer ring enhance the planarity of quasi-planar structures, and, secondly, can the interior boron atoms be replaced by aluminum? A series of aluminum isoelectronic substitution of boron clusters have been investigated ranging from $B_{7}^{-}$ to $B_{12}^{-}$. Aluminum turns out to avoid the central position in the all these clusters and enhance the planarity of $AlB_{6}^{-}$ and $AlB_{11}^{-}$ clusters by expanding the peripheral ring. \vspace{12pt} References: [1] C. Romanescu, A. P. Sergeeva, W. L. Li, A. I. Boldyrev and L. S. Wang, \textit{J. Am. Chem. Soc}. \textbf{133} (22), 8646-8653 (2011) [2] T. R. Galeev, C. Romanescu, W. L. Li, L. S. Wang and A. I. Boldyrev, \textit{J. Chem. Phys.} \textbf{135}, (8) 104301 (2011) [3] W. L. Li, C. Romanescu, T. R. Galeev, L. S. Wang and A. I. Boldyrev, \textit{J. Phys. Chem. A} \textbf{115} (38), 10391-10397 (2011

SUITABILITY ANALYSIS FOR BUILDING DAM LAKES IN THE ORIENTAL CARPATHIAN MOUNTAINS, ROMANIA. CASE STUDY: TROTUS RIVER BASIN PhD Student Andrei Enea MSc Student Daniel Neamțu

ABSTRACT This paper aims to analyze the suitability of Trotus river drainage basin, for building dam lakes. At present, water demand is a rising, global issue. There are numerous studies concerning water supply in different regions, as well as solutions for areas associated with water level decrease. Numerous economical sectors imply the use of water (agriculture, industry, tourism, food industry etc), therefore the analysis of areas where potential, new, artificial dam lakes can be built, is mandatory. There are numerous factors that engineers have to take into consideration, when building a dam for an artificial lake. Some of the most important parameters are land use, geology, soil and inhabited areas. For this study, these parameters have been combined into a multi-layer based GIS analysis, in which each layer has different values corresponding to the suitability of the elements contained on that layer, to the dam building purpose. The main results reveal a classified version of a suitability report, depicting the best areas for building a dam lake, in Trotus drainage basin. After choosing the best location for a potential, new lake, several calculations have been made, regarding simulated lake surface, the time it would take to fill the lake, according to different flow rates of the chosen river, the number of households that would have to be moved / relocated because of the lake expansion, and also potential estimated costs for the household relocation process. Overall, this methodological approach is considered to be valid, taking into consideration the validation of the results, with real life dams, that have already been built in these areas