Ken-ichi Maruyama

Learn More
Baraitser-Winter syndrome (BaWS) is characterized by iris coloboma, ptosis, hypertelorism, and mental retardation; it is a rare multiple congenital anomaly or a mental-retardation syndrome of unknown etiology. Patients suffering from this syndrome have been also found to show brain anomalies such as pachygyria, subcortical-band heterotopia (SBH), and(More)
For a based, 1-connected, finite CW-complex X, we study the following subgroups of the group of homotopy classes of self homotopy equivalences of X: E∗(X), the subgroup of homotopy classes which induce the identity on homology groups, E∗(X), the subgroup of homotopy classes which induce the identity on cohomology groups and E # (X), the subgroup of homotopy(More)
We study the group of homotopy classes of self maps of compact Lie groups which induce the trivial homomorphism on homotopy groups. We completely determine the groups for SU(3) and Sp(2). We investigate these groups for simple Lie groups in the cases when Lie groups are p-regular or quasi p-regular. We apply our results to the groups of self homotopy(More)
The semigroup of the homotopy classes of the self-homotopy maps of a finite complex which induce the trivial homomorphism on homotopy groups is nilpotent. We determine the nilpotency of these semigroups of compact Lie groups and finite Hopf spaces of rank 2. We also study the nilpotency of semigroups for Lie groups of higher rank. Especially, we give Lie(More)
A newborn girl with neuroblastoma presented with hypertension (blood pressure 200/140 mm Hg). The concentration of active renin in the ipsilateral renal vein was exceedingly high compared with those in the other venous systems, and angiography results showed narrowing of the contralateral 2 renal arteries. The tumor regressed in size after chemotherapy, but(More)
We present an autopsy case of ornithine transcarbamylase (OTC) deficiency with grumose degeneration in the dentate nucleus of the cerebellum. The patient had intractable neonatal convulsions and hyperammonemia from the 3rd day after birth. Diagnosis of OTC deficiency was made based on null activity of the enzyme and four-base deletions in exon 9 of the OTC(More)
  • 1