geoscience.net logo
+ Resolve Article
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter

+ Translate
+ Subscribe to Site Feed
GeoScience Most Shared ContentMost Shared Content

Changes in thermal and electrical properties of bone as a result of 1 MGy-dose gamma-irradiation


, : Changes in thermal and electrical properties of bone as a result of 1 MGy-dose gamma-irradiation. International Journal of Biological Macromolecules 33(1-3): 89-93

Determination of temperature dependencies of electric conductivity and thermal properties by differential scanning calorimetry (DSC) allow to analyse the processes of charge and heat transport in the bone being a complex collagen-hydroxyapatite (HAP)-water system. Modification of the bone structure by high doses of gamma-radiation changes the electrical and thermal properties of the bone. Electrical conductivity (sigma) of the bone decreases with consecutive heating runs. The decrease in sigma observed for irradiated samples was explained by the scission of the main chain of collagen macromolecule. Irradiation decreased the hydration level in the bone, its denaturation temperature and increased both enthalpy and entropy of the denaturation process.

US$29.90

PMID: 14599589


Other references

Fardella, C.E.; Poggi, H.; Soto, J.; Torrealba, I.; Cattani, A.; Ugarte, F.; Cortinez, A.; Foradori, A., 2000: Mutations in the CYP21B gene in a Chilean population with simple virilizing congenital adrenal hyperplasia. Steroid 21-hydroxylase deficiency (21OHD) compromises about 95% of all cases of congenital adrenal hyperplasia. We have characterized the disease-causing mutations in the steroid 21-hydroxylase genes of 19 Chilean patients (12 females and 7 males)...

Touge, T.; Ishibashi, T.; Kamoda, M.; Tsukaguchi, M.; Takeuchi, H., 1999: "Painful legs and moving toes" and muscle cramps spreading to the bilateral legs in a patient with alcoholic polyneuropathy. A 37-year-old man with alcoholic polyneuropathy showed involuntary movement as intermittent flexion-extension or abduction-adduction of his toes identical to "painful legs and moving toes (PLMT)" and muscle cramps. Regarding the sequenti...

Salgado, H.; Tecuapetla, F.; Perez-Rosello, T.; Perez-Burgos, A.; Perez-Garci, E.; Galarraga, E.; Bargas, J., 2005: A reconfiguration of CaV2 Ca2+ channel current and its dopaminergic D2 modulation in developing neostriatal neurons. The modulatory effect of D(2) dopamine receptor activation on calcium currents was studied in neostriatal projection neurons at two stages of rat development: postnatal day (PD)14 and PD40. D(2)-class receptor agonists reduced whole cell calcium c...

Yuruk, K.; Bartels, S.A.; Milstein, D.M.J.; Bezemer, R.; Biemond, B.J.; Ince, C., 2012: Red blood cell transfusions and tissue oxygenation in anemic hematology outpatients. There is little clinical evidence that red blood cell (RBC) transfusions improve oxygen availability at the microcirculatory level. We tested the hypotheses that anemia in chronically anemic patients with relatively healthy microcirculation would...

Hildebrandt, J.; Pfingsten, M.; Franz, C.; Saur, P.; Seeger, D., 1996: Multidisciplinary treatment program for chronic low back pain, part 1. Overview. A multimodal treatment program is presented in cases of functional restoration for chronic low back pain. The study comprises four parts. Part I gives an overview of the different results of the study. Part II focuses on the medical and functional...

Debrot, S.; Mermod, C., 1978: Morphometrie cranienne par radiographie. 2: Application a une population d'hermines (Mustela erminea). As an application of a method of radiographical craniometry, 73 X-ray photographs of live stoats are measured. A statistical analysis permits the comparison of adults and juveniles of both sexes. The difficulties in comparing a museum collection w...

Decaux, G.; Unger, J.; Mockel, J., 1980: Urea therapy for inappropriate antidiuretic hormone secretion from tuberculous meningitis. JAMA 244(6): 589-590

Carlson, C.S.; DeSimone, L.A.; Weiskel, P.K., 2008: Simulated effects of year 2030 water-use and land-use changes on streamflow near the Interstate-495 corridor, Assabet and upper Charles River basins, eastern Massachusetts. Continued population growth and land development for commercial, industrial, and residential uses have created concerns regarding the future supply of potable water and the quantity of ground water discharging to streams in the area of Interstate...

Mandić, Z.; Gabelica, V., 2006: Ionization, lipophilicity and solubility properties of repaglinide. Potentiometric and spectrophotometric titrations were used for the determination of ionization behaviour, lipophilicity and solubility profile of repaglinide. Acid-base equilibria were characterized by means of protonation macro- and microconstant...

Ingr, I., 1981: Abnormal pH-values in pork meat. Prumysl potravin: Technika a ekonomika prumyslove vyroby potravin 32(11): 609-611