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A Triglia

Publications and source records attributed to A Triglia.

10 recordsLinked to original sources
PubMed2005

Role of water content in dielectric properties and delayed luminescence of bovine Achilles' tendon.

In order to investigate the role of water network in collagen structure, measurement of dielectric permittivity was performed on bovine Achilles' tendon as a function of water content. The data show a sudden decrease of the permittivity at each measured frequency value when the tendon humidity decreases. A similar behaviour is shown by the total number of photons emitted in delayed luminescence (DL) experiments. The comparison of the two results is in agreement with the hypothesis that DL is connected to the excitation and subsequent decay of collective electronic states, whose properties depend on the organized structure of the system.

Achilles Tendon↗
PubMed2001

Delayed luminescence of biological systems arising from correlated many-soliton states.

The kinetics of the delayed luminescence arising from correlated coherent many-soliton states in low-dimensional macromolecular systems, is calculated and shown to be different from the one arising from independent soliton states. The correlation between coherent electron states is essential at relatively high levels of excitation in the presence of very long macromolecules in a system. These conditions can be fulfilled in such biological systems, like algae Acetabularia Acetabulum. The cytoskeleton of this unicellular alga contains macromolecular structures (actin filaments, microtubules, etc.) of the length of several hundreds angstroms and more, in which many-soliton coherent states can exist. Indeed, the correlated coherent model is shown to give better fit of the experimental data for this type of algae in a wide range of intensities of the stimulating light, as compared with the model of noncorrelated solitons. The nonlinearity of the dependence of delayed luminescence intensity on the level of excitation increases with the increase of correlation between solitons.

Acetabularia↗
PubMed2000

Analogous features of delayed luminescence from Acetabularia acetabulum and some solid state systems.

This paper compares some features of the delayed luminescence in the seconds range emitted from an unicellular alga Acetabularia acetabulum and from some solid state systems. Results lead us to think that such delayed luminescence is connected to the dimension of the ordered structures present in both biological and solid state systems. In particular, for the biological system examined, these structures are thought to be those which contribute to the dynamic formation of the cytoskeleton.

Acetabularia↗
PubMed1997

Delayed luminescence from simple biological systems.

Photoinduced ultraweak photon emission in the seconds time range from several living organisms is described. Some characteristics of this phenomenon and its dependence on some physical parameters are discussed. Some experimental evidence of the connection between this phenomenon and the functional state of the biological systems is reported.

Luminescent Measurements↗
PubMed1997

The spontaneous ultraweak luminescence of living systems.

The results of experimental research on ultraweak photon emission carried out at the Institute of Physics, Catania University, are presented here. A correlation has been demonstrated to exist between photon emission and growth activity in the germination of soya seeds and also during the exponential phase of the growth of yeast cell cultures. In addition an experiment on the self irradiation of yeast cells is reported that confirms the mitogenic effect hypothesized by Gurwitsch.

Luminescent Measurements↗
PubMed1992

Photon emission from normal and tumor human tissues.

Photon emission in the visible and near ultraviolet range by samples of human tissue removed during surgery has been measured by means of a low noise photomultiplier coupled to a data acquisition system. The results show that among the 25 analyzed samples the 9 from normal tissues had an emission rate of the order of some tens of photons/cm2 min, while most of the 16 tumor tissue samples had a very much higher rate.

Humans↗
PubMed1992

Intracystic carcinoma of the breast. Our experience.

Malignant tumours of the breast occurring as cysts present an incidence from 0.3% to 0.7%. The Authors report their experience during 15 years in 470 patients with carcinoma of the breast. Endocystic carcinoma appeared in 0.6% of patients: the diagnosis is not always possible with cytology, but ultrasound scans make possible to identiphy cysts which have to undergo biopsy because solid areas within the cystic cavity have been detected. In this case surgery is advised even if the cytological examination has been negative.

Adult↗
PubMed1991

Self-irradiation effect on yeast cells.

The effect of self irradiation on yeast cells has been investigated by counting the young gemmae formation in 104 self irradiated samples, as compared with an equal set of control samples. The results show that the rate of gemmae formation is higher in self irradiated samples; the statistical significance of the results is discussed.

Radiation↗