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Boletin De La Anabad, 1999

La Documentacion Cartografica Tratamiento Gestion Y Uso 2001 Isbn 84 95699 03 6 Pags 313 386, 2001

Boletin De La Asociacion Andaluza De Bibliotecarios, 1996

Indices: p. [707]-811 Copia digital: realizada por la Biblioteca de Andalucía

Revista española de Documentación Científica, 1996

C h r y s o f l u o r e n a 1 k o h o 1 (C16 HI& C H. 0 H wird durch Reduction des Chrysoketons m... more C h r y s o f l u o r e n a 1 k o h o 1 (C16 HI& C H. 0 H wird durch Reduction des Chrysoketons mittelst Zink und Salzsiiure erhalten und bildet weisse, seideglanzende Nadeln, bei schnellem Auskrystallisiren atlasglanzende Rliittchen, welche bei 166-1670 schmelzen, in Alkohol, Aether, Chloroform, Renzol leicht, in Ligroi'n schwer liislich sind und fast ohne Zersetzung sublimiren. Durch geringe Verunreinigungen wird das Krysfallisationsvermiigen sehr beeintrachtigt. Concentrirte Schwefelsaure nimmt Chrysofluorenalkohol mit rothvioletter Farbe auf, welche besonders nach einigem Stehen scharf herrortritt; die alkoholische Liisung dagegen fiirbt sich durch Schwefelsilure blau und scheidet beim Elwarmen weisse Flocken aus, welche vielleicht den Chrysofluorenather darstellen. Ber. fcir C l i H 1 2 0 Gefunrlen C di.9:i 87.3 pCt.

The Journal of Physical Chemistry C, 2013

The vibrational properties of atomic clusters are a fingerprint of their structures and can be us... more The vibrational properties of atomic clusters are a fingerprint of their structures and can be used to investigate their thermodynamic behavior at low temperatures. In this work, we report a theoretical study, using density functional theory, on the vibrational spectrum and density of states (VDOS) of the cationic sodium cluster Na 139 +. Our study focuses on the most stable isomer, which corresponds to a truncated icosahedron. This isomer displays an electronic density of states that is in good agreement with photoelectron spectroscopy data previously published. After validation of the sodium cluster structure, its vibrational frequency spectrum was obtained in the harmonic approximation through a diagonalization of the dynamical matrix. The calculated vibrational frequencies were used to evaluate the cluster caloric curve and heat capacity at low temperatures. An excellent agreement was obtained between the calculated caloric curve and experimental data recently reported down to 6 K. A fit to the bulk Debye model of the calculated and measured cluster thermal energy yields a large variation at low temperatures of the equivalent Debye temperature as compared with a weaker temperature dependence found in bulk materials. Moreover, a further analysis shows that the calculated heat capacity of the 139-atom cationic sodium cluster does not follow the bulk Debye T 3 law at very low temperatures, due to the discreteness of the cluster frequency spectrum, and to the finite value of its acoustic gap (lowest frequency value). These results, indicating a finite size effect on the cluster vibrational spectrum, reflect the difference in the VDOS between clusters and bulk, and confirm the limitation of the bulk Debye model (and Debye temperature) to describe the low-temperature thermal behavior of metal clusters in the size range of around 139 atoms. The calculated vibrational frequency spectrum also provides the temperature dependence of the total vibrational excitation for the 139-atom sodium clusters, indicating that at 6 K, ∼ 92% of them are in their vibrational ground state.

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2010

The CMS muon system is taking cosmic data since 2006 and is using them to study the performance o... more The CMS muon system is taking cosmic data since 2006 and is using them to study the performance of the three different detector technologies and triggers (drift tube, cathode strip chambers and resistive plate chambers). The muon system is described placing emphasis on the software tools that were developped and used to take data and to study, online and offline, the performance of the muon system. The results obtained analyzing up to 300 millions of cosmics acquired with the CMS detector will be described.

Journal of Community Health, 2011

Purpose-To describe the impact of a community gardening project on vegetable intake, food securit... more Purpose-To describe the impact of a community gardening project on vegetable intake, food security and family relationships. Methods-This community-based participatory research project used popular education techniques to support and educate Hispanic farm worker families in planting and maintaining organic gardens. Measures included a pre-post gardening survey, key informant interviews and observations made at community-based gardening meetings to assess food security, safety and family relationships. Results-Thirty-eight families enrolled in the study during the pre-garden time period, and four more families enrolled in the study during the post-garden period, for a total of 42 families enrolled in the 2009 gardening season. Of the families enrolled during the pre-gardening time period there were 163 household members. The mean age of the interviewee was 44.0, ranging from 21 to 78 years of age. The median number of occupants in a household was 4.0 (range: 2 to 8), Frequency of adult vegetable intake of "Several time a day" increased from 18.2% to 84.8%, (p < 0.001) and frequency of children's vegetable intake of "Several time a day" increased from 24.0% to 64.0%, (p = 0.003). Before the gardening season, the sum of the frequencies of "Sometimes" and "Frequently" worrying in the past month that food would run out before money was available to buy more was 31.2% and the sum of these frequencies dropped to 3.1% during the post garden period, (p = 0.006). The frequency of skipping meals due to lack of money was not statistically significantly different before and after the gardening season for either adults or