Search results for "BOX"

Direct Visualization of Molecule Deprotonation on an Insulating Surface

2012

Elucidating molecular-scale details of basic reaction steps on surfaces is decisive for a fundamental understanding of molecular reactivity within many fields, including catalysis and on-surface synthesis. Here, the deprotonation of 2,5-dihydroxybenzoic acid (DHBA) deposited onto calcite (101;4) held at room temperature is followed in situ by noncontact atomic force microscopy. After deposition, the molecules form two coexisting phases, a transient striped phase and a stable dense phase. A detailed analysis of high-resolution noncontact atomic force microscopy images indicates the transient striped phase being a bulk-like phase, which requires hydrogen bonds between the carboxylic acid moie…

Bifidobacterium pseudocatenulatum CECT 7765 supplementation restores altered vascular function in an experimental model of obese mice

2017

Aims. Bifidobacterium pseudocatenulatum CECT 7765 improves metabolic and immunological altered functions in high fat fed mice, however little is known about the effects of potential probiotics on vascular reactivity. The aim of the present study was to investigate the effects of a potential probiotic strain, Bifidobacterium pseudocatenulatum CECT 7765, on vascular response in obese mice. Methods. Aorta samples were obtained from mice, which were divided into three groups: a control group, receiving a standard diet; an obese group, receiving a high-fat diet; and an obese group receiving high-fat diet and a daily dose of B. pseudocatenulatum CECT 7765 by oral gavage. Aortic rings were suspend…

Speciation of dimethyltin(IV) – and trimethyltin(IV) – carbocysteinate and – glutamate systems in aqueous media

2008

The formation of complex species in the dimethyltin(IV) and trimethyltin(IV)-carboxymethyl-L-cysteinate (carbocysteinate) systems in NaClaq, at different ionic strengths, and in a multicomponent Na+, K+, Ca2+, Mg2+, Cl- and SO42- medium representative of the seawater major composition, is discussed. Experimental results give evidence for the formation of the following species (L¼carbocysteinate): [(CH3)2Sn(L)]0, [(CH3)2Sn(HL)]+, [(CH3)2Sn(OH)(L)]-, [(CH3)2Sn(OH)2(L)]2- in the DMT–CCYS system, and [(CH3)3Sn(HL)]0, [(CH3)3Sn(L)]- and [(CH3)3Sn(OH)(L)]2- in the TMT-CCYS system. The ionic strength dependence of formation constants was taken into account by an extended Debye Huckel type equation…

Direct P-functionalization of azobenzene by a cationic phosphidozirconocene complex.

2016

International audience; We report that the cationic phosphidozirconocene complex [(eta(5)-C5H5)(2)Zr(PCy2)][CH3B(C6F5)(3)] (II) reacts with azobenzene, resulting in the expedient formation of Zr complex (2) bound to a tridentate PNN ligand. This reaction proceeds by a mechanism of cooperative nucleophilic substitution of hydrogen. The intermediate sigma(H) adduct (1) has been characterized by NMR spectroscopy.

Trecento gotico doloroso e cortese in Sicilia: le opere in mostra

2020

Il saggio descrive molte delle opere d'arte del XIV e XV secolo esposte in mostra (dipinti su tavola, sculture lignee, oggetti in argento con smalti, cofanetti in avorio e legno), di fattura locale, italiana, cipriota-egea, iberica, francese e tedesca, tutte provenienti dalla Sicilia, alcune legate alla famiglia Chiaromonte. The essay describes many of the 14th and 15th century works of art on display (paintings on wood, wooden sculptures, silver objects with enamels, ivory and wooden boxes), of local, Italian, Cypriot-egean, Iberian, French and German manufacture, all from Sicily, some related to the Chiaromonte family.

Combustion behavior of black liquors : droplet swelling and influence of liquor composition

2017

The combustion of black liquor (BL) in a recovery boiler is a central process in a kraft pulp mill for recovering the cooking chemicals and for producing heat and power. This work explored the most important combustion behavior of BL, the swelling of in-flight droplets, from the viewpoint of liquor composition. It also studied the combustion behavior of BL droplets obtained from two biorefining subprocesses (carbonation and hot-water pretreatment, HWP) and sulfur-free pulping alternatives (soda-anthraquinone (AQ) and oxygen-alkali pulping). The formation of a plastic state essential for the swelling of BL droplet was found to result from the melting of an array of carbohydrate-derived aliph…

Study of Zumba game playing experience, related to previous knowledge of Zumba

2014

The focus of this research is to make an analysis of the experiences of Xbox Kinect Zumba game players in correlation to the real Zumba classes. Through the observation of the Zumba game, specifically using the Xbox Kinect motion detection technology, the researcher intends to create a user experience similar to the real classroom experience and/or create a situation pleasant enough to interest the subjects in real Zumba classes or further game playing, despite of their preconceptions about the game/activity. Negative results will be used to pinpoint what is lacking in this situation and environment to achieve the level of comfort and enjoyment required. The researcher intends to show that …

Sequestration of biogenic amines by alginic and fulvic acids.

2006

The interaction of natural (alginic and fulvic acids) and synthetic (polyacrylic acid 2.0 kDa) polyelectrolytes with some protonated polyamines [diamines: ethylendiamine, 1,4-diaminobutane (or putrescine), 1,5-diaminopentane (or cadaverine); triamines: N-(3-aminopropyl)-1,4diaminobutane (or spermidine), diethylenetriamine; tetramine: N.N'-bis(3-aminopropyl)-1,4-diaminobutane (or spermine); pentamine: tetraethylene-pentamine; hexamine: pentaethylenehexamine] was studied at T=25 degrees C by potentiometry and calorimetry. Measurements were performed without supporting electrolyte, in order to avoid interference, and results were reported at I=0 mol L(-1). For all the systems, the formation of…

Synthesis and characterization of a new set of protic ionic liquids

2012

Feasibility of controlling the thermal regime of the transmission of agricultural machines in conditions of Ukraine

2019

During the heating of the tractor gearbox oil, there is a decrease in the efficiency, which leads to an increase in fuel consumption. This is observed at any time of the year. The efficiency of a gearbox as a function of the ambient temperature and the operating time has been obtained. This allows you to predict the effectiveness of the work of the tractor. Various methods to improve transmission performance were analyzed. The article analyzes the parameters of the exhaust gas of a tractor diesel engine. It was proved that one of the effective methods for temperature control is to use of an exhaust gas heat recovery system. It was shown that the capacity of the exhaust gas recovery system i…