Yu-Mei Xue

Learn More
Oxidative stress is one of the most important pathological mechanisms in neurodegenerative diseases and ischemia. Recent studies have indicated that the sonic hedgehog (SHH) signaling pathway is involved in these diseases, but the underlying mechanisms remains elusive. Here we report that the SHH pathway was activated in primary cultured cortical neurons(More)
Pattern Sturmian words introduced by Kamae and Zamboni KZ1, KZ2] are an analogy of Sturmian words for the maximal pattern complexity instead of the block complexity. S o f a r , t wo kinds of recurrent pattern Sturmian words are known, namely, rotation words and Toeplitz words. But neither a structural characterization nor a reasonable classiication of the(More)
The maximal pattern complexity of one-dimensional words has been studied in several papers [T. Kamae, L. Zamboni, Sequence entropy and the maximal pattern complexity of infinite words, Ergodic Theory Dynam. We study the maximal pattern complexity p * (k) of two-dimensional words. A two-dimensional version of the notion of strong recurrence is introduced. It(More)
Let A be a finite subset of Z 2. We say A tiles Z 2 with the translation set C, if any integer z ∈ Z 2 can be represented as z1 + z2, z1 ∈ A, z2 ∈ C in a unique way. In this case we call A a Z 2-tile and write A ⊕ C = Z 2. A tile A is said to be a normal Z 2-tile if there exists a periodic set C such that A ⊕ C = Z 2. We characterize all normal Z 2-tiles(More)
The article entitled Predictive value of serum uric acid on left atrial spontaneous echo contrast in non-valvular atrial fibrillation patients by Liao, et al. has given important data regarding the association between uric acid level and spontaneous echo contrast in patients with non-valvular atrial fibrillation. [1] This relationship has become an(More)
The L-type calcium channel (LCC) plays a regulatory role in various physical and pathological processes. In the vasculature, LCCs mediate agonist-induced vascular smooth muscle contraction. However, whether LCC-mediated vessel responses to certain vasoconstrictors vary among species remains unclear. The coronary arteries were dissected from the hearts of(More)
BACKGROUND 5-Hydroxytryptamine (5-HT) is a powerful constrictor of coronary arteries and is considered to be involved in the pathophysiological mechanisms of coronary-artery spasm. However, the mechanism of enhancement of coronary-artery constriction to 5-HT during the development of coronary artery disease remains to be elucidated. Organ culture of intact(More)