Marianne Fangting Chen, violin and Yu Jin, piano, February 4, 2017

This is the concert program of the Marianne Fangting Chen, violin and Yu Jin, piano performance on Saturday, February 4, 2017 at 4:00 p.m., at the Concert Hall, 855 Commonwealth Avenue. Works performee were Sonata for Violin and Piano in A major, OP. 162, D. 574 by Franz Schubert, Violin concerto NO. 2 in G minor, Op. 63 by Sergei Prokofiev, and 3 Preludes for Violin and Piano by George Gershwin, arranged by Jascha Heifetz. Digitization for Boston University Concert Programs was supported by the Boston University Humanities Library Endowed Fund

Chinese Foreign Policy during the Cultural Revolution (Book Review)

Book review by Thomas D. Curran. Barnouin, Barbara and Yu Changgen.Chinese Foreign Policy during the Cultural Revolution. London: Kegan Paul International, 1998. ISBN 0-7103-0580-

Remarks on the number of tubulin dimers per neuron and implications for Hameroff-Penrose Orch OR

Stuart Hameroff has wrongly estimated that a typical brain neuron has 10^7^ tubulin dimers and wrongly attributed this result to Yu and Baas, J. Neurosci. 1994; 14: 2818-2829. In this letter we show that Hameroff’s estimate is based on misunderstanding of the results provided by Yu and Baas, who actually measured the total microtubule length in a single axonal projection with length of 56 μm in a differentiating in vitro stage 3 embryonic hippocampal neuron. In order to visualize how big Hameroff’s error is, we have reconstructed two of the studied by Yu and Baas embryonic hippocampal neurons with Neuromantic v1.6.3 and compared them with previously published reconstructions of adult hippocampal neurons. Correct calculations show that an adult differentiated pyramidal neuron in vivo has approximately 1.3×10^9^ tubulin dimers incorporated in cytoskeletal microtubules. This estimate has profound implications for the Hameroff-Penrose Orch OR model, because it sets limitations on the number of quantum coherent neurons and implies that if 100% of the neuronal microtubules are quantum coherent for 25 ms then Hameroff-Penrose Orch OR conscious events should involve only 15 pyramidal neurons