Let t, be r-dimensional real projective space with r odd, and let irnDiff* : Pr be the group of orientation preserving difteomorphisms P,-* P, factored by the normal subgroup of those concordant (= pseudoiso topic) to the identity. The main theorem of this paper is that fores 11 mod 16 the group T0Diff+: P, is isomorphic to the homotopy group irr+i+k(&/Pk-\), where k dlL r 1 with L > <p((r + l)...

A new acylated triterpene together with prunasin, (-)-epicatechin, daucosterol, and three triterpenes, ursolic, oleanolic, and pomolic acids was isolated from the root of Chaenomeles japonica (THUNB.) LINDL. (Rosaceae) and determined to be 3-O-(E)-3, 5-dihydroxycinnamoylursolic acid on the basis of NMR and FAB-MS experiments.

The structures of two new dimeric acridone alkaloids, glycobismine-D (1) and -E (2), having a novel linkage as binary acridones, three monomeric acridones, glycocitrine-IV (3), -V (4), and -VI (5), and three quinolone alkaloids, glycocitlone-A (6), -B (7), and -C (8) from Glycosmis citrifolia (Willd.) Lindl. (Rutaceae) have been elucidated by spectrometric studies.

Reactions of [8,8,8-(H)(PPh(3))(2)-9-(Py)-nido-8,7-RhSB(9)H(9)] (1), [1,1-(PPh(3))(2)-3-(Py)-closo-1,2-RhSB(9)H(8)] (2), and [1,1-(CO)(PPh(3))-3-(Py)-closo-1,2-RhSB(9)H(8)] (4), where Py = Pyridine, with HCl to give the Cl-ligated clusters, [8,8-(Cl)(PPh(3))-9-(Py)-nido-8,7-RhSB(9)H(9)] (3) and [8,8,8-(Cl)(CO)(PPh(3))-9-(Py)-nido-8,7-RhSB(9)H(8)] (5), have recently demonstrated the remarkable n...

Department of Chemistry, Jiangsu Key L Monitoring and Pollution Control, Sc Engineering, Nanjing University of Inform 210044, Jiangsu, PR China. E-mail: yccaoh@ Department of Macromolecular Science a University, 10900 Euclid Avenue, Cleveland edu Beijing Institute of Information Technology School of Chemistry & Life Science, Nan 210089, Jiangsu, PR China † Electronic supplementary information (...

B. HUANG*?, P. FERYS, L. XUES and Y. WANGT[ ?Department of Geography and Resource Management, The Chinese University of Hong Kong, Shatin, NT, Hong Kong SDepartment of Civil Engineering, National University of Singapore, Singapore §Institute of Remote Sensing and Geographic Information Systems, Peking University, Beijing, PR China TInstitute of Geographical Sciences and Nature Resources Researc...

of nutrients, especially phosphate rock (PR) in subSahara Africa (McClellan, 1989; Buresh et al., 1997). Affordable technologies are needed to allow smallholder farmers Substantial deposits of PR in many sub-Sahara Afrito effectively use the phosphate rocks (PRs) found in many African countries. A pot study was conducted in Tanzania using two PRs can countries are too low-grade to justify comme...

A series of uranyl(VI) dihalide complexes UO2X2L2 (X = Cl, Br) supported by organic amide ligands (L = R'C(O)NR2; R' = i-Pr; R = i-Pr, i-Bu, s-Bu) offers the versatile combination of facile synthesis using benchtop methods, air-stable crystalline solids obtained in high yield, high solubility in common organic solvents and tunable steric/electronic properties.

&#192; partir d&#8217;entretiens avec des personnes converties &#224; l&#8217;islam et d&#8217;observations ethnographiques dans une organisation musulmane am&#233;ricaine, cet article interroge la pr&#233;valence du registre discursif de l&#8217;individualisme religieux les r&#233;cits conversion. Il cherche mettre en perspective ces rep&#233;rant mani&#232;re dont organisations religieuses co...