27 research outputs found
Thermal (in)stability of type I collagen fibrils
We measured Young's modulus at temperatures ranging from 20 to 100 ^{\circ}25-45^{\circ}45-80^{\circ}70-80^{\circ}120^\circ$C. Our main result
is a five-stage mechanism by which the instability of a single collagen at
physiological temperatures is compensated by the interaction between collagen
molecules within the fibril.Comment: 4 pages, 4 figure
Observation of Resonant Diffusive Radiation in Random Multilayered Systems
Diffusive Radiation is a new type of radiation predicted to occur in randomly
inhomogeneous media due to the multiple scattering of pseudophotons. This
theoretical effect is now observed experimentally. The radiation is generated
by the passage of electrons of energy 200KeV-2.2MeV through a random stack of
films in the visible light region. The radiation intensity increases resonantly
provided the Cherenkov condition is satisfied for the average dielectric
constant of the medium. The observed angular dependence and electron resonance
energy are in agreement with the theoretical predictions. These observations
open a road to application of diffusive radiation in particle detection,
astrophysics, soft X-ray generation and etc.. `Comment: 4pages, 4figure
Hairy cell leukemia. Clinical recommendations
Hairy cell leukemia. Clinical recommendation
Does creatine kinase-MB (CK-MB) isoenzyme elevation following percutaneous coronary intervention with drug-eluting stents impact late clinical outcome?
BACKGROUND: The incidence of postprocedural creatine kinase (CK)-MB elevation to >3x the upper limit of normal after percutaneous coronary intervention (PCI) has been reported at rates of up to 18% in the bare metal stent era and is correlated with higher adverse cardiovascular outcomes. This study examined the incidence and prognostic significance of CK-MB elevations after drug-eluting stent (DES) implantation. METHODS: The records of 2,537 patients who underwent DES implantation and completed > or =6 months' follow-up were evaluated. Patients with acute myocardial infarction and those who presented in cardiogenic shock and had elevated cardiac enzymes at baseline were excluded from the analysis. Of these, 179 patients (7.1%) had > or =3x postprocedural CK-MB and 2,358 patients had or =3x elevation had a higher number of diseased vessels (2.15 +/- 0.86 vs. 1.81 +/- 0.87; P or =3x elevation following PCI with DES continues to be a marker for the complexity of coronary disease and lack of clinical success; and correlates with higher rates of subacute thrombosis as well as late adverse events at 6-months and 1-year postprocedure.6 page(s