1,720,990 research outputs found
Chlorinated guest orientation and mobility in the clathrate phase structure with syndiotactic polystyrene
No full text
Possibile coinvolgimento di uno stadio di trasferimento elettronico nella nitrazione aromatica.
No full textEvaluation and improvement of the official methods for the detection of quarantine bacteria in potato seeds tubers.
No full text
Detection of diagenetic alterations by spectroscopic analysis on archaeological bones from necropolis of Poseidonia (Paestum: a case of study)
No full textUnderstanding the chemical and physical alteration in archaeological bones, occurred after burial, is very interesting for researchers. In this paper,
we present a study on the diagenetic alteration of human archaeological bony tissues from Paestum (South Italy), by combining complementary
spectroscopic techniques, such as solid-state nuclear magnetic resonance (NMR), infrared spectroscopy (IR), and X-ray diffraction. In particular,
13C nuclear magnetic resonance–cross polarization-magic angle spinning (13C NMR CP-MAS) spectroscopy allows to identify and discriminate
the adsorbed calcite, that is a diagenetic contaminant, from the structural one of apatite and 1H NMR-MAS spectroscopy shows how the degradation
of organic phase of collagen is related to the time. The NMR data are combined with crystalline index, measured by X-ray diffraction, and with the
splitting factor obtained by infrared spectroscopy. Moreover, the evaluation of the relative content of biogenic structural carbonate and of diagenetic
fluorine is reported
Orientation control of low molecular weight guest molecules into nanoporous crystalline polymer films
No full text
- …
