[Pini cembrae coni: histo-anatomical and chemical studies, assessment of antioxidant activity].

Unlabelled: This study aimed to identify some histoanatomical features, to evaluate the polyphenolic content and antioxidant activity of cembran pine female cones.

Material And Methods: The cross sections, obtained by usual techniques, were examined using a Novex microscope with a Canon A95 digital camera. For chemical and antioxidant assays dried cones were extracted with 80% aqueous methanol.

Chemical, antioxidant and antimicrobial investigations of Pinus cembra L. bark and needles.

The chemical constituents and biological activity of Pinus cembra L. (Pinaceae), native to the Central European Alps and the Carpathian Mountains, are not well known. The aim of the present work was to examine the phenolic content, antioxidant and antimicrobial effects of hydromethanolic extracts of Pinus cembra L.

Gas phase 1(1)Sigma(u)+ <--X1Sigma(g)+ electronic spectra of polyacetylenes HC2nH, n = 5-7.

The 1(1)Sigma(u)+ <--X1Sigma(g)+ system in polyacetylenes HC2nH (n = 5-7) has been observed for the first time in the gas phase. The UV absorption spectra of these chains were recorded using the resonant two-color two-photon ionization technique. A strong vibrational progression corresponding to the acetylenic stretching mode in the excited state has been observed.

Characterization of the X[combining tilde] (1)A(1) and A (1)B(2) electronic states of titanium dioxide, TiO(2).

The strong band system at 536 nm, tentatively assigned as the A (1)B(2)<-- X[combining tilde] (1)A(1)(000-000) vibronic transition, in TiO(2) has been recorded at a spectral resolution of 40 MHz, both field free and in the presence of a static electric field. The Stark induced shifts were analyzed to determine the permanent electric dipole moments of 6.33 +/- 0.

Gas phase electronic spectrum of linear AlCCH.

The electronic spectrum of the aluminium containing species AlCCH has been detected in the gas phase in the region 315-355 nm. The experiment used a mass selective resonant two-color two-photon ionization technique coupled to a laser ablation source. Structures of the AlCCH isomers have been optimized using density functional theory (DFT) and the excitation energies to the low-lying electronic excited states calculated.

Resonant two-photon ionization spectroscopy of BNB.

Triatomic BNB has been produced by laser ablation of a boron nitride rod in a supersonic expansion of helium carrier gas and has been investigated using resonant two-photon ionization spectroscopy in the visible region. The B 2Pi(g)-X 2Sigma(u)+ band system has been recorded near 514 nm and is dominated by a strong origin band, which has been rotationally resolved and analyzed. Both the (11)B(14)N(11)B (64% natural abundance) and the (10)B(14)N(11)B (32% natural abundance) isotopic modifications have been analyzed, leading to the spectroscopic constants (and their 1sigma error limits) of B0"(X 2Sigma(u)+)=0.

Quantitative analysis in nanoliter wells by prefilling of wells using electrospray deposition followed by sample introduction with a coverslip method.

In contrast to performing assays on a substrate using immobilization techniques, wet analysis in nanoliter-sized wells allows quantitative monitoring of enzyme-based reactions by measuring luminescence with time. However, a suitable dispensing method is required to accurately deposit stabilized enzyme solutions into nanoliter wells in such a manner that the enzyme activities are preserved prior to and during measurements. Furthermore, an efficient method is required to add sample liquid to these wells in such a manner that evaporation of assay liquid is completely prevented during sample introduction and monitoring.