TY - JOUR AU - Sazanov, Leonid A AU - Karavaev, V A AU - Kukushkin, A K ID - 1941 JF - Russian Journal of Physical Chemistry B SN - 1990-7931 TI - Mathematical model of photosynthesis regulation accounts for the effects of changes in external conditions and observed oscillations VL - 52 ER - TY - JOUR AB - Injection of large amounts of a mixture of horseradish peroxidase and wheat germ agglutinin-horseradish peroxidase conjugate into the upper cervical segments of the spinal cord in the Japanese monkey (Macaca fuscata) led to the retrograde labeling of a small number of neuronal cell bodies within the rostral part of the subthalamic nucleus of Luys. Direct projection from the subthalamic nucleus to the spinal cord appeared to be much less prominent in the Japanese monkey than in the cat and rat. AU - Mizuno, Noboru AU - Ueyama, Teizo AU - Itoh, Kazuo AU - Satoda, Takahiro AU - Tashiro, Takashi AU - Shigemoto, Ryuichi ID - 2523 IS - 1 JF - Neuroscience Letters SN - 0304-3940 TI - Direct projections from the subthalamic nucleus of Luys to the spinal cord in the Japanese monkey VL - 89 ER - TY - JOUR AB - Non-pyramidal neurons in cat Ammon's horn were shown to send their axons to the supramammillary regions (SMR), i.e. the supramammillary nucleus and its vicinities including the supramammillary nucleus and the lateral, posterior and dorsal hypothalamic areas: wheat germ agglutinin-horseradish peroxidase (WGA-HRP) injection into Ammon's horn resulted in labeling of presumed axon terminals in the SMR; and after injecting HRP into the SMR, retrogradely labeled non-pyramidal neurons were seen in Ammon's horn. AU - Ino, Tadashi AU - Itoh, Kazuo AU - Kamiya, Hiroto AU - Shigemoto, Ryuichi AU - Akiguchi, Ichiro AU - Mizuno, Noboru ID - 2522 IS - 1 JF - Brain Research SN - 0006-8993 TI - Direct projections of non-pyramidal neurons of Ammon's horn to the supramammillary region in the cat VL - 460 ER - TY - JOUR AB - Alpha-ketoglutamate (α-KG) reductive amination activity in rat brain was found to be mostly absorbed with an antibody against liver glutamate dehydrogenase. With this and anti-glutamine synthetase antibodies, α-KG reductive amination activity was immunocytochemically shown to coexist with glutamine synthetase activity in astrocytes. The results suggest that astrocytes de novo synthesize glutamate from α-KG and ammonia, and metabolize it to glutamine. AU - Kaneko, Takeshi AU - Shigemoto, Ryuichi AU - Mizuno, Noboru ID - 2524 IS - 1 JF - Brain Research SN - 0006-8993 TI - Metabolism of glutamate and ammonia in astrocyte an immunocytochemical study VL - 457 ER - TY - JOUR AB - The structural basis and distribution of variation in the ribosomal RNA multigene family ( rDNA) was studied in the X0 and neo-XY races of the Alpine grasshopper Podisma pedestris. Restriction-enzyme sites in the gene region of the rDNA repeat were identical in both races and homogeneous in the rDNA family. In contrast, sites for Hind111 and PvuII in the intergenic spacer (IGS) region showed racial divergence and variation within the rDNA family and within populations. A short insertion in the 28s gene region was present in a minority of repeats in both races. The distributions of four polymorphic IGS Hind111 fragments were surveyed at 43 locations in and around the hybrid zone. Two of these fragments appear to be distributed as clines, one of which is strongly associated with the neo-X chromosome. The other two fragments show considerable variation in both races and show negative association. It is proposed that the clinally distributed variants arise from processes of amplification and divergence of IGS sequence variants and that such divergence may contribute to hybrid inviability. AU - Dallas, John AU - Barton, Nicholas H AU - Dover, Gabriel ID - 3655 IS - 6 JF - Molecular Biology and Evolution SN - 0737-4038 TI - Interracial rDNA variation in the grasshopper Podisma Pedestris VL - 5 ER - TY - GEN AU - Barton, Nicholas H AU - Jones, Steve AU - Mallet, James ID - 4318 SN - 0028-0836 T2 - Nature TI - No barriers to speciation VL - 336 ER - TY - CONF AB - Arrangements of curves in the plane are of fundamental significance in many problems of computational and combinatorial geometry (e.g. motion planning, algebraic cell decomposition, etc.). In this paper we study various topological and combinatorial properties of such arrangements under some mild assumptions on the shape of the curves, and develop basic tools for the construction, manipulation, and analysis of these arrangements. Our main results include a generalization of the zone theorem of [EOS], [CGL] to arrangements of curves (in which we show that the combinatorial complexity of the zone of a curve is nearly linear in the number of curves), and an application of (some weaker variant of) that theorem to obtain a nearly quadratic incremental algorithm for the construction of such arrangements. AU - Edelsbrunner, Herbert AU - Guibas, Leonidas AU - Pach, János AU - Pollack, Richard AU - Seidel, Raimund AU - Sharir, Micha ID - 4097 KW - line segment KW - computational geometry KW - Jordan curve KW - cell decomposition KW - vertical tangency SN - 978-3-540-19488-0 T2 - 15th International Colloquium on Automata, Languages and Programming TI - Arrangements of curves in the plane - topology, combinatorics, and algorithms VL - 317 ER - TY - JOUR AB - In this paper we study the problem of polygonal separation in the plane, i.e., finding a convex polygon with minimum number k of sides separating two given finite point sets (k-separator), if it exists. We show that for k = Θ(n), is a lower bound to the running time of any algorithm for this problem, and exhibit two algorithms of distinctly different flavors. The first relies on an O(n log n)-time preprocessing task, which constructs the convex hull of the internal set and a nested star-shaped polygon determined by the external set; the k-separator is contained in the annulus between the boundaries of these two polygons and is constructed in additional linear time. The second algorithm adapts the prune-and-search approach, and constructs, in each iteration, one side of the separator; its running time is O(kn), but the separator may have one more side than the minimum. AU - Edelsbrunner, Herbert AU - Preparata, Franco ID - 4090 IS - 3 JF - Information and Computation TI - Minimum polygonal separation VL - 77 ER - TY - CONF AU - Edelsbrunner, Herbert ID - 4096 SN - 978-3-540-19488-0 T2 - 15th International Colloquium on Automata, Languages and Programming TI - Geometric structures in computational geometry VL - 317 ER - TY - JOUR AB - An X-ray probe through a polygon measures the length of intersection between a line and the polygon. This paper considers the properties of various classes of X-ray probes, and shows how they interact to give finite strategies for completely describing convex n-gons. It is shown that (3n/2)+6 probes are sufficient to verify a specified n-gon, while for determining convex polygons (3n-1)/2 X-ray probes are necesssary and 5n+O(1) sufficient, with 3n+O(1) sufficient given that a lower bound on the size of the smallest edge of P is known. AU - Edelsbrunner, Herbert AU - Skiena, Steven ID - 4091 IS - 5 JF - SIAM Journal on Computing SN - 0097-5397 TI - Probing convex polygons with X-Rays VL - 17 ER - TY - CHAP AU - Barton, Nicholas H ED - Myers, Alan ED - Giller, Paul ID - 4317 KW - biogeography KW - biology KW - complexity KW - distribution KW - evolution KW - geology SN - 978-0-412-40050-6 T2 - Analytical biogeography: An integrated approach to the study of animal and plant distributions TI - Speciation ER - TY - GEN AU - Coyne, Jerry AU - Barton, Nicholas H ID - 4315 SN - 0028-0836 T2 - Nature TI - What do we know about speciation? VL - 331 ER - TY - GEN AU - Barton, Nicholas H AU - Jones, Steve ID - 4316 SN - 0028-0836 T2 - Nature TI - Molecular evolutionary genetics VL - 332 ER -