Dietary vitamin D deficiency and development of cardiovascular system

Loffreda, A.; Vitagliano, S.; Novellis, Vito de; Losasso, C.; Santis, Domenico De; Stella, L.; Angrisani, M.; Cenicola, M. L.; Paola, C. De; Matera, Carlo; Falzarano, C.; Guarino, Vincenza

doi:10.1016/s1043-6618(09)80301-0

Cited by 3 publications

(11 citation statements)

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“…(It has also been suggested by some researchers [7 -9,36] that the threefold hollow site, bridge site and top site were stable adsorption sites, while others [4,10 -14] have concluded that only the threefold hollow site and top site were stable adsorption sites, but the bridge site was not.) This work indicates that CO preoccupy threefold sites, corresponding to the vibrational frequency of 1871 (H ) and 1873 cm −1 (H), which is closer to the experimental results of 1823-1936, [4] 1893-1895, [11 -14] and 1890 [32,37] cm −1 than other theoretical calculations of 1828-1830 [10] and 1803 [34] cm −1 . The vibrational frequency of the B site is 1920 cm −1 .…”

Section: Co-pd (111) Systemsupporting

confidence: 85%

“…The vibrational frequency of the B site is 1920 cm −1 . This result is closer to the experimental results of 1940, 1955, [32] 1925, and 1951 [37] cm −1 than other theoretical results of 1848 [10] and 1876 [34] cm −1 . The T site has a vibrational frequency of 2059 cm −1 .…”

Section: Co-pd (111) Systemsupporting

confidence: 84%

“…Interface Anal. 2011, 43, 1038 [22] 1.14 [21] 1.16 -(100) B 1.15 ± 0.01 [5] 1.14 [6] 1.16 -(111) H 1.15 ± 0.05 [32] 1.188, 1.189 [7] , 1.188, 1.183 [33] 1.17 R C -Pd (Å) (110) SB -1.90, 1.92 [21] 1.90 × 2 -(100) B 1.93 ± 0.07 [5] -1 .90 × 2 -(111) H 2.05 ± 0.04 [33] 2.067, 2.1 [34] 2.0 × 3 Z C -Pd (Å) (100) B 1.36 ± 0.01 [5] 1.59 [6] 1.32 -H 1 .29 ± 0.05 [33] 1.296 [10] 1.23 f (cm −1 ) (100) B 1895-1949 [4] , 1904 [5] 2076 [6] 1950 --T 2096 [4] -2065 -(110) B 1890-2000 [19] , 1892-1977 [35] -1963 ---1917-1935, 1882-1912 [20] ----T 2115, 2100 [19] , 2068-2095 [20] -2070 -(111) H 1823-1936 [4] , 1893-1895 [11 -14] 1828-1830 [10] 1873 ---1823 [36] , 1890 [32,37] 1755, 1803 [34] 1871 --T 2092 [4] , 2083, 2158, 2093 [32] , 2097-2110 [11 -14] , 2108, 2081 [37] 2052, 2085 [10] , 1987, 2102 [34] 2059 --B 1896 [36] , 1955, 1940 [32] , 1925, 1951 [37] 1848 [10] 1876 [34] 1920…”

Section: Co-pd (100) Systemmentioning

confidence: 99%

“…1.56 [4] 0.79 [6] , 1 . 7 -(110) SB 1.6 [1] 1.55 [16] 1.43 [21] 1.63 -(111) H 1.49 [4] 1.98, 2.01 [10] 1.99 [15] 1.92…”

Section: Co-pd (100) Systemmentioning

confidence: 99%

“…The second IR band appeared at 2092 cm −1 at 0.5 ML and was assigned to CO adsorbed at the top site. Loffreda et al [10] used the density functional theory-generalized gradient approximation (DFT-GGA) method to study the CO-Pd (111) system and also suggested that the threefold hollow sites (fcc, hcp) were the most stable states at low coverage. The binding energies were 2.01 eV (fcc) and 1.98 eV (hcp), and the frequencies were 1829 and 1830 cm −1 , respectively.…”

Section: Introductionmentioning

confidence: 99%

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Adsorption of carbon monoxide on Pd low‐index surfaces and (110) reconstructed surface

Zhang

Wang

2010

Surface & Interface Analysis

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Section: Co-pd (111) Systemsupporting

confidence: 85%

Section: Co-pd (111) Systemsupporting

confidence: 84%

Section: Co-pd (100) Systemmentioning

confidence: 99%

“…1.56 [4] 0.79 [6] , 1 . 7 -(110) SB 1.6 [1] 1.55 [16] 1.43 [21] 1.63 -(111) H 1.49 [4] 1.98, 2.01 [10] 1.99 [15] 1.92…”

Section: Co-pd (100) Systemmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Adsorption of carbon monoxide on Pd low‐index surfaces and (110) reconstructed surface

Zhang

Wang

2010

Surface & Interface Analysis

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Periodic domain boundary ordering in a dense molecular adlayer: Sub-saturation carbon monoxide on Pd(111)

Liu

Hong

et al. 2017

Surface Science

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We describe a previously unreported ordered phase of carbon monoxide adsorbed on the (111) facet of single crystal palladium at near-saturation coverage. The adlayer superstructure is identified from low energy electron diffraction to be c( ) 16×2 with respect to the underlying Pd(111) surface net. The ideal coverage is determined to be 0.6875 ML, approximately 92% of the 0.75-ML saturation coverage. Density functional theory calculations support a model for the molecular packing characterized by strips of locally-saturated ( ) 2×2 regions, with the CO bound near high-symmetry surface sites, separated by antiphase domain boundaries. The structure exists in a narrow coverage range and is prepared by heating the saturated adlayer to desorb a small fraction of the CO. Comparison of the c( ) 16×2 domain-boundary structure with structural motifs at lower coverages suggests that between 0.6 and 0.6875 ML the adlayer order may be more strongly influenced by interadsorbate repulsion than by adsorption-site-specific interactions. The system is an example of the structural complexity that results from the compromise between adsorbate-substrate and adsorbate-adsorbate interactions.

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Energetics of elementary reaction steps relevant for CO oxidation: CO and O2 adsorption on model Pd nanoparticles and Pd(111)

et al. 2013

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The energetics of elementary surface processes relevant for CO oxidation, particularly CO and 02 adsorption, were investigated by a direct calorimetric method on model Pd nanoparticles and on the extended Pd(111) single crystal surface. The focus of this study lies on a detailed understanding of how a nanometer scale confinement of matter affects the binding strength of gaseous adsorbates. We report adsorption energies and sticking coefficients of CO and 02 measured as a function of the adsorbate surface coverage both on pristine and O-covered Pd surfaces. The reduced dimensions of the Pd substrate were found to affect the binding strength of the adsorbates in two principle ways: (i) via the change of the local adsorption environment that can result e.g. in stronger adsorbate bonding at the particle's low coordinated surface sites and (ii) via the contraction of the Pd lattice in small clusters and a concomitant weakening of chemisorptive interaction. Particularly for 02 adsorption, the change of the adsorption site from a three-fold hollow on Pd(111) to the edge site on Pd nanoparticles (approximately 4 nm sized on average) was found to result in a strong increase of the Pd-O bond strength. In contrast, CO adsorbs weaker on Pd nanoparticles as compared to the extended Pd(111) surface. In total, the binding energies of adsorbates on Pd and with this their surface coverages turn out to depend in a non-monotonic way on the particular structure of Pd surfaces, including the local structure of the adsorption site as well as the global properties of the small clusters arising e.g. from the lattice contraction.

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Dietary vitamin D deficiency and development of cardiovascular system

Cited by 3 publications

References 1 publication

Adsorption of carbon monoxide on Pd low‐index surfaces and (110) reconstructed surface

Adsorption of carbon monoxide on Pd low‐index surfaces and (110) reconstructed surface

Periodic domain boundary ordering in a dense molecular adlayer: Sub-saturation carbon monoxide on Pd(111)

Energetics of elementary reaction steps relevant for CO oxidation: CO and O2 adsorption on model Pd nanoparticles and Pd(111)

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