A review of tin oxide-based catalytic systems: Preparation, characterization and catalytic behavior

This paper reviews the important aspects of the preparation, characterization and catalytic behavior of tin oxide-based catalytic systems including doped tin oxide, mixed oxides which contain tin oxide, Pt supported on tin oxide and Pt/Sn supported on alumina. These systems have a broad range of applications and are continually increasing in importance. However, due to their complex nature, much remains to be understood concerning how they function catalytically

Gar was yesterday, tomorrow is uncertain

It was a time of conversation is an archive and research project. It revisits the story of three exhibitions that took place in the first half of the 1990s in Turkey: Elli Numara: Anı Bellek II [Number Fifty: Memory/Recollection II], GAR [Railway Station] and Küreselleşme–Devlet, Sefalet, Şiddet [Globalization–State, Misery, Violence]. In 2012, SALT visualized the research in the form of an exhibition at SALT Galata in the Open Archive. This was followed by a more developed presentation of the exhibition at SALT Ulus in 2013

Degradation of organic compounds and production of activated species in Dielectric Barrier Discharges and Glidarc reactors

Major sterilization mechanisms are related to atoms and radicals, charged parti-cles, excited molecules, ozone, and UV radiation. The ROS (Reactive Oxygen Species) are well known as evildoers. These species are easily created in ambient air and water and they live long enough to reach the cell and attack the organic matter. Test molecules conversion in dry and wet air is studied using Dielectric Barrier Discharge (DBD) and Gliding Arc Reactors (GAR). The effects of tem-perature and energy deposition into the media on the active species production and then on the organic compounds degradation are presented for two non thermal plasma reactors: DBD and GAR. Main production species investigated are OH, O3, NOx, CO and CxHyOz by-products. It is shown from experiment analysis that the reactive species production is quite different from one reactor to another. GAR and pulsed DBD are two chemical processing ways in which the temperature of heavy species in ionized gas is determinant. By reviewing the species production obtained from both reactors, a discussion is open about plasma decontamination.Comment: NATO-AdvancedStudy Institute on Plasma Assisted Decontamination of biological and Chemical Agents, Cesme-Izmir : Turquie (2007

To Liberty, Honor, and…Cufflinks?: The Grand Army of the Republic

Borne of the Civil War, one fraternal organization quickly assumed such great authority that it re-shaped cultural prescriptions of manhood, dictated the northern public’s memory of the war, and even influenced presidential elections. This organization, the Grand Army of the Republic (GAR), was formed in Illinois in 1866 by veteran Benjamin Franklin Stephenson and its number of posts in the United States quickly increased. In order to be a member, one simply had to be a Union veteran. By the 1890s, there were 7,000 GAR posts around the country; approximately 1.3 million men, half of all Union veterans, were group members. Members would have worn these cufflinks, or more commonly, the badge with the same image on it, as status symbols. [excerpt

Modelling the structure of full-length Epstein-Barr virus nuclear antigen 1

Epstein-Barr virus (EBV) is a clinically important human virus associated with several cancers and is the etiologic agent of infectious mononucleosis. The viral nuclear antigen-1 (EBNA1) is central to the replication and propagation of the viral genome and likely contributes to tumourigenesis. We have compared EBNA1 homologues from other primate lymphocryptoviruses (LCV) and found that the central glycine/alanine repeat (GAr) domain, as well as predicted cellular protein (USP7 and CK2) binding sites are present in homologues in the Old World primates, but not the marmoset; suggesting that these motifs may have co-evolved. Using the resolved structure of the C-terminal one third of EBNA1 (homodimerisation and DNA binding domain), we have gone on to develop monomeric and dimeric models in silico of the full length protein. The C-terminal domain is predicted to be structurally highly similar between homologues, indicating conserved function. Zinc could be stably incorporated into the model, bonding with two N-terminal cysteines predicted to facilitate multimerisation. The GAr contains secondary structural elements in the models, while the protein binding regions are unstructured, irrespective of the prediction approach used and sequence origin. These intrinsically disordered regions may facilitate the diversity observed in partner interactions. We hypothsise that the structured GAr could mask the disordered regions, thereby protecting the protein from default degradation. In the dimer conformation, the C-terminal tails of each monomer wrap around a proline-rich protruding loop of the partner monomer, providing dimer stability, a feature which could be exploited in therapeutic design

Thermal Tolerance of Alligator Gar (Atractosteus spatula)

Alligator gar belong to an ancient lineage that dates back over 215 million years. Historically, alligator gar populations occurred in the Mississippi River basin from Illinois (USA) to Mexico. Alligator gar populations have been reduced or extirpated throughout much of their range, and introductory programs have been implemented by some state and federal agencies attempting to reestablish historical populations. Efforts have been aided by studies investigating many ecological and life-history aspects of this species. However, thermal minima has yet to be evaluated for alligator gar. The goal of this thesis is to provide quantified estimates of alligator gar minima temperatures and to forecast potential range distribution based on current and predicted future climate scenarios. Newly hatched alligator gar were collected from a hatchery. The gar were acclimated to three different aquarium temperatures (21°C, 24.5°C, and 28°C) and then the water temperature was slowly decreased until the gar lost equilibrium. Variables (temperature[°C], total length [mm], and weight [g]) were tested for correlation and logistic regression models were used to determine the relationship between loss of equilibrium temperature and length or weight. Akaike’s information criterion scores were used to evaluate the best model. Additionally, alligator gar occurrence data was obtained from published papers, historical photos, field observations, and by downloading existence records from the Global Biodiversity Information Facility. These occurrences were combined with bioclimatic variables, terrestrial, aquatic and elevation data and then run in Maxent to estimate a current range and to forecast potential future ranges under different predicted climate scenarios. All variables were tested for correlation and Akaike’s information criterion scores in addition to receiver operating characteristics were used to evaluate models. Mean critical thermal minima temperatures obtained for each acclimation were 11.57°C, SD = 1.39 (21°C), 12.83°C, SD = 1.47 (24.5°C), and 14.16°C, SD = 1.60 (28°C). Alligator gar suitable habitat is expected to increase and shift to the north under all climate scenarios. The furthest shift north occurs under the most extreme warming scenario. This study provides the first quantified estimates of juvenile alligator gar thermal minima temperatures and fills a gap in alligator gar life history. The results from this study can be used in future studies aimed at conservation and management of alligator gar. Additionally, findings from this study can aid in determining the future northern extent of alligator gar distribution. Future research should investigate critical thermal minima of alligator gar larger than 519mm (the largest individual used in this study). Also, the survival of alligator gar that have been introduced at the northern edge of current projected suitable habitats should be followed to verify recruitment

Архитектура распределенной системы поддержки символичных вычислений на базе математического пакета GAP

В работе представлен программный продукт, являющийся пакетом дополнений к системе символьных вычислений GAR. Описываемый пакет является средством интеграции GAR с платформой Java; на базе этого средства строятся графическая оболочка и система обмена задачами и результатами их решения между несколькими работающими экземплярами GAR

ISS and TPD study of the adsorption and interaction of CO and H2 on polycrystalline Pt

The adsorption and interaction of CO and H2 on polycrystalline Pt has been studied using ion scattering spectroscopy (ISS) and temperature programmed desorption (TPD). The ISS results indicate that the initial CO adsorption on Pt takes place very rapidly and saturates the Pt surface with coverage close to a monolayer. ISS also shows that the CO molecules adsorb at an angular orientation from the surface normal and perhaps parallel to the surface. A TPD spectrum obtained after coadsorbing C-12 O-16 and C-13 O-18 on Pt shows no isotopic mixing, which is indicative of molecular CO adsorption. TPD spectra obtained after coadsorbing H2 and CO on polycrystalline Pt provides evidence for the formation of a CO-H surface species