A new triflavanoid, kandelin B-5 (1), was isolated from the rhizomes of Smilax china L., together with six known phenylpropanoid substituted flavan-3-ols (2-7), nine flavonoids (8-16), two stilbenoids (17, 18), and two other compounds (19, 20). The structure of compound 1 was determined on the basis of 1D, 2D NMR and HR-ESI-MS data, as well as chemical method. Compounds 2-5, 8-12, 15, 17, and 1...

Guanxi is an important part of Chinese business culture, and there are a large number of business people from all over the world coming to China since its opening up and reform policies. The purpose of this paper is to examine the importance of Guanxi to multinational companies in China, and discuss if its importance has declined since China’s opening up and reform policies have reached an adva...

Robert M. Hartwell, in his path-breaking article on the transformation from the eighth to the sixteenth century, defined this transition as the demise and re-absorption of “a semihereditary professional bureaucratic elite” into “a multitude of local elite gentry families,” which it had hitherto coexisted with. Since Hartwell maintained that those local gentry elites had dominated the local scen...

Background We present results of expanding the contents of the China Biographical Database by text mining historical local gazetteers, difangzhi地方志 . The goal of the database is to see how people are connected together, through kinship, social connections, and the places and offices in which they served. The gazetteers are the single most important collection of names and offices covering the S...

We introduce an approach to revealing the likelihood of different population histories that utilizes an explicit model of sequence evolution for the DNA segment under study. Based on a phylogenetic tree reconstruction method we show that a Tamura-Nei model with heterogeneous mutation rates is a fair description of the evolutionary process of the hypervariable region I of the mitochondrial DNA f...

This paper introduces a family of tetravalent graphs called rose window graphs, denoted by Rn(a, r), and investigates their symmetry properties. Four families of these graphs are shown to be edge-transitive and it is conjectured that every Rn(a, r) which is edge-transitive belongs to one of these families. Proofs and conjectures about the size of a dart-stabilizer and about regular maps contain...

It shows him in his Public Health Service uniform sometime after 1915, when he attained the rank of Assistant Surgeon General. Carter was a quarantine officer and a field epidemiologist, best known for his discovery in 1898 of the extrinsic incubation period of yellow fever. His discovery led directly to the historic finding by Reed, Carroll, Agra-monte, and Lazear in 1900 that mosquitoes are t...

BACKGROUND Tuberculosis (TB) is a major infectious disease globally. Adequate and proper use of anti-TB drugs is essential for TB control. This study aims to study China's production capacity and sales situation of anti-TB drugs, and to further discuss the potential for China to contribute to global TB control. METHODS The production data of anti-TB drugs in China from 2011 to 2013 and the sa...

On June 2, 2015, Irwin (Ernie) Rose died quietly in his sleep at age 88, after a long and fruitful lifetime of sleuthing for the secrets of life at the molecular level. Truly great scientists are much more than the sum of their publications and awards. This is especially true for Ernie who, when informed that he had been awarded the 2004 Nobel Prize in Chemistry, wondered aloud whether he reall...