Spectroscopic studies of second-generation sensitizers and their photochemical reactions in liposomes and cells

1991 ◽  
Author(s):  
Benjamin Ehrenberg ◽  
Eitan Gross ◽  
Adina Lavi ◽  
Fred M. Johnson ◽  
Zvi Malik
Keyword(s):  
Second Generation ◽  
Spectroscopic Studies ◽  
Photochemical Reactions

scholarly journals Адаптация золь-гель технологии наноструктурированного оксида цинка для целей гибкой электроники

2019 ◽  
Vol 89 (12) ◽  
pp. 1917
Author(s):  
И.А. Аверин ◽  
И.А. Пронин ◽  
Н.Д. Якушова ◽  
А.А. Карманов ◽  
Е.А. Алимова ◽  
...  
Keyword(s):  
Sol Gel ◽  
Spectroscopic Studies ◽  
Temperature Treatment ◽  
Photochemical Reactions ◽  
Qualitative Composition ◽  
Low Temperature Treatment ◽  
Zinc Oxide Films ◽  
Film Forming ◽  
Ultraviolet Range ◽  
Before And After

Abstract The possibility of replacing classical sol-gel operation methods of high-temperature annealing by photo-annealing using ultraviolet-range radiation has been analyzed. A technique for synthesizing hierarchically organized zinc oxide films using sol-gel technology based on the parallel combination of low-temperature treatment and UV photo-annealing is proposed. Spectroscopic studies of the qualitative composition of the film-forming sol and nanomaterials based on it, obtained on various types of substrates, have been carried out before and after initiation of photochemical reactions.

Polymorphism and structure–property relations

2020 ◽  
pp. 273-341
Author(s):  
Joel Bernstein
Keyword(s):  
Second Harmonic ◽  
Three Dimensional ◽  
Spectroscopic Studies ◽  
Photochemical Reactions ◽  
Structure Property ◽  
Time Resolved ◽  
Property Relations ◽  
High Pressure Studies ◽  
Organic Magnetic Materials ◽  
The One

Chapter 6 deals with the connection between the structure and properties of solids as revealed and studied in polymorphic systems. The subject is divided into properties that depend on the one hand on the bulk—that is, the three-dimensional arrangement of the molecules and the interactions among them—and on the other hand the consideration of the crystal as an “oriented gas” serving to act as a matrix for the molecules to permit the study of molecular properties. Among the properties described in the former category are electrical conductivity, organic magnetic materials, photovoltaicity and photoconductivity, second harmonic generation, chromoisomerism, photochromism, thermochromism and mechanochromism, and the mechanosalient effect. The latter category includes a discussion of spectroscopic studies (infrared, Raman, and ultraviolet/visible), excimer phenomena, time-resolved studies of excited states, photochemical reactions and thermal and gas reactions, along with a variety of emission phenomena. The chapter closes with a brief survey of rapidly emerging and developing high pressure studies

1.2-Verzweigte Carbosiloxan-Dendrimere mit Hauptgruppenelementund Übergangsmetall-modifizierten Oberflächen / 1.2-Branched Carbosiloxane-Dendrimers with Main-Group Element and Transition-Metal Modified Surfaces

1999 ◽  
Vol 54 (6) ◽  
pp. 751-756 ◽  
Author(s):  
Karin Brüning ◽  
Bettina Lühmann ◽  
Heinrich Lang
Keyword(s):  
Transition Metal ◽  
Second Generation ◽  
Spectroscopic Studies ◽  
Main Group ◽  
Group Element ◽  
H Nmr ◽  
Main Group Element ◽  
Elemental Analyses ◽  
Modified Surfaces ◽  
First And Second Generation

The preparation of the first and second generation carbosiloxane dendrimers Si[OCH2- CH2CH2 SiMe(OCH2C=CH)2]4 (3) and Si{OCH2H2CH2SiMe[OCH2CH2CH2SiMe(OCH2 - C=CH)2]2}4 (5) by the reaction o f Si(OCH2CH2CH2SiMeCl2)4 (1) or Si[OCH2CH2CH2SiMe- (OCH2CH2CH2SiMeCl2)2]4 (4) with HOCH2C =CH (2) in the presence o f NEt3 is described. Dendrimers 3 and 5 contain propargyloxy units as terminal groups, which can be transferred to Co2((CO)8 (6) to give the hexacarbonyldicobalt functionalized dendritic molecules Si{OCH2CH2CH2[(η-OCH2C=CH)CO2(CO)6]2}4 (7) and Si{OCH2CH2CH2SiMe-(OCH2CH2CH2SiMe[(η-OCH2C=CH)CO2(CO)6]2)2}4 (8). All compounds were characterized by elemental analyses, spectroscopic studies (IR,1H-, 13C{1H }-, 29Si{1H} NMR) as well as GPC investigations

scholarly journals Spectroscopic studies of stellar populations in globular clusters and field stars: Implications for globular cluster and Milky Way halo formation

2019 ◽  
Vol 14 (S351) ◽  
pp. 241-250
Author(s):  
Raffaele Gratton
Keyword(s):  
Globular Clusters ◽  
Second Generation ◽  
Massive Stars ◽  
Stellar Populations ◽  
Spectroscopic Studies ◽  
Chemical Compositions ◽  
Agb Stars ◽  
Intermediate Mass ◽  
Massive Clusters ◽  
Fast Rotating

AbstractWe review spectroscopic results concerning multiple stellar populations in globular clusters. The cluster initial mass is the most important parameter determining the fraction of second generation stars. The threshold for the onset of the multiple population phenomenon is 1–3×105 M⊙. Nucleosynthesis is influenced by metallicity: Na/O and Mg/Al anti-correlations are more extended in metal-poor than in metal-rich clusters. Massive clusters are more complex systems than the smaller ones, with several populations characterized by different chemical compositions. The high Li abundance observed in the intermediate second generation stars strongly favours intermediate mass AGB stars as polluters for this class of stars; however, it is well possible that the polluters of extreme second generation stars, that often do not have measurable Li, may be fast rotating massive stars or super-massive stars. The mass budget factor should be a function of the cluster mass, and needs to be large only in massive clusters.

Second-Generation Antidepressants May Be Safer

2008 ◽  
Vol 41 (14) ◽  
pp. 23
Author(s):  
SHERRY BOSCHERT
Keyword(s):  
Second Generation
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