Carbohydrate Research, 212 (1991) c23-c26 Elsevier Science Publishers B.V., Amsterdam Crystal and molecular structure of methyl a-p-galactopyranoside 4-(sodium sulphate) dihydrate J. A. Kanters, B. van Dijk, and J. Kroon (Utrecht, The Netherlands) Incidence and avoidance of stereospecific |,2-ethylthio group migration during the synthesis of ethyl 1-thio-a-L-rhamnopyranoside 2,3-orthoester F.-I. Auzanneau and D. R. Bundle (Ottawa, Ont., Canada) Thermal and photochemical degradation of sodium N-acetylneuraminate N. Sugiyama, K.-i. Saito, K. Fujikura, K. Sugai, N. Yamada, M. Goto, C. Ban, E. Hayasaka, and K. Tomita (Tokorozawa, Japan) Synthesis of aromatic Amadori compounds M. G. Lopez and D. W. Gruenwedel (Davis, CA. U.S.A.) Chemical synthesis and biological activities of 6,6'-di-O-mycoloyl-£,f- and -a-f-trehalose I. Azuma, T. Sakurai, H. Ishida (Sapporo, Japan), T. Kitajima, and M. Yamazaki (Shizuo- ka, Japan) One-step preparation of 6-perfluoroalkylalkanoates of trehalose and sucrose for biomedical uses S. Abouhilale, J. Greiner, and J. G. Riess (Nice, France) Deoxyhydroxyamino analogs of sugars: derivatives of methyl 2,3-dideoxy-2-hydroxyamino-a-b- arabino- and -lyxo-hexopyranosides J.M.J. Tronchet, N. Bizzozero, M. Zsély, F. Barbalat-Rey, N. Dolatshahi, G. Bernardinelli, and M. Geoffroy (Geneva, Switzerland) A new stereospecific method for | ,2-cis-glycosylation N. K. Kochetkov, E. M. Klimov, N. N. Malysheva, and A. V. Demchenko (Moscow, An improved synthesis of evernitrose P. Jiitten and H.-D. Scharf (Aachen, F.R.G.) Kinetic aspects of the glass-transition behaviour of maltose-water mixtures T. R. Noel, S. G. Ring, and M. A. Whittam (Norwich, Gt. Britain) Formation of dihydrofuran derivatives by intramolecular substitution of the manno adducts formed by Michael reaction of a 1-O-acetyl-3-C-nitro-2-enopyranose derivative with 2,4-pentane- dione and dibenzoylmethane T. Sakakibara, A. Seta, and T. Nakagawa (Yokohama, Japan) Structure and reactions of amino- and nitro-heptoseptanosides obtained by cyclization of dialde- hydes with nitromethane J. Defaye, A. Gadelle, F. Movilliat, R. Nardin (Grenoble, France), and H. H. Baer (Ottawa, Ont., Canada) Extraction and characterisation of water-soluble pectic substances from guava (P sidium guajava L.) O. Marcelin, L. Saulnier, and J.-M. Brillouet (Montpellier, France) Structure of pescaproside E, a fatty acid glycoside from /pomoea pescaprae R. Srivastava, K. Sachdev, K. P. Madhusudanan, and D. K. Kulshreshtha (Lucknow, India) c24 Alfalfa-stem pectins: enzymic degradation and structural characterization of a buffer-soluble frac- tion R. D. Hatfield (Madison, WI, U.S.A.) Structure of the O21 antigen from Serratia marcescens D. Oxley and S. G. Wilkinson (Hull, Gt. Britain) The hydrodynamic frictional coefficient of polysaccharides: the role of the glycosidic linkage O. Zamparo and W. D. Comper (Clayton, Vic., Australia) Analysis of the characteristic action of D-enzyme from sweet potato in terms of subsite theory T. Suganuma, S. Setoguchi, S$. Fujimoto, and T. Nagahama (Kagoshima, Japan) Structure of am annan isolated from the lipopolysaccharide of the reference strain (S3255) for a new serogroup of Serratia marcescens D. Oxley and S. G. Wilkinson (Hull, Gt. Britain) Structural studies of the capsular polysaccharide from Actinobacillus pleuropneumoniae serotype 12 L. M. Beynon, J. C. Richards, and M. B. Perry (Ottawa, Ont., Canada) Investigation of the fine structure of alpha-dextrins derived from amylopectin and their relation to the structure of waxy-maize starch E. Bertoft (Turku, Finland) Notes Chains of intermediate lengths in waxy-maize amylopectin E. Bertoft (Turku, Finland) A database of three-dimensional structures of monosaccharides from molecular-mechanics calcula- tions S. Pérez and M.-M. Delage (Nantes, France) Synthesis and reactions of 2-methyl-5-(D-arabino-tetrahydroxybuty])-3-furoylhydrazine M. M. El Sadek and N. B. Zagzoug (Alexandria, Egypt) Synthesis of 2-acetamido-2-deoxy-3-O-f-p-galactopyranosyl-D-galactopyranose from 2-acetami- do-2-deoxy-D-glucose through a trifluoromethylsulfonyl group displacement A. Lubineau and H. Bienaymé (Orsay, France) Enolate semiquinones formed during the alkaline oxidative degradation of 2-deoxy sugars 1. Simkovic, P. Pelikan, and J. Plaéek (Bratislava, Czechoslovakia) A facile, large-scale preparation of the methyl 2-thioglycoside of N-acetylneuraminic acid, and its usefulness for the «-stereoselective synthesis of siaglycosides A. Hasegawa, H. Ohki, T. Nagahama, H. Ishida, and M. Kiso (Gifu, Japan) 2-C-Carbamoyl-, 2-C-cyano, and 2-C-acetamidomethyl-substituted glycosides D. Mostowicz, O. Zegrocka, and M. Chmielewski (Warsaw, Poland) Maltotetraose-forming amylase-mediated, p-nitrophenyl a- and £-maltopentaoside formation in an aqueous-—organic solvent system: a substrate for human amylase in serum K. Ogawa, T. Murata, and T. Usui (Shizuoka, Japan) Somatic antigens of pseudomonads: structure of the O-specific polysaccharide chain of Pseudomo- nas syringae pv. syringae (cerasi) 435 lipopolysaccharide E. V. Vinogradov, A. S. Shashkov, Ya. A. Knirel (Moscow, U.S.S.R.), G. M. Zdorovenko, L. P. Solyanik, and R. I. Gvozdyak (Kiev, U.S.S.R.) Somatic antigens of pseudomonads: structure of the O-specific polysaccharide chain of Pseudomo- nas syringae pv. lachrymans 7591 (serogroup IX) lipopolysaccharide A. S. Shashkov, E. V. Vinogradov, E. D. Daeva, Ya. A. Knirel (Moscow, U.S.S.R.), G. M. Zdorovenko, N.Ya. Gubanova, L. M. Yakovleva, and I. Ya. Zakharova (Kiev, U.S.S.R.) Somatic antigens of pseudomonads: structure of the O-specific polysaccharide chain of Pseudomo- mas syringae pv. tabaci 225 (serogroup VIII) lipopolysaccharide E. V. Vinogradov, A. S. Shashkov, Ya. A. Knirel (Moscow, U.S.S.R.), G. M. Zdorovenko, L. P. Solyanik, N.Ya. Gubanova, and L. M. Yakoleva (Kiev, U.S.S.R.). 2... ...... Somatic antigens of pseudomonads: structure of the O-specific polysaccharide chain of Pseudomo- nas gladioli pv. alliicola 8494 (serogroup X) lipopolysaccharide E. V. Vinogradov, E. D. Daeva, A. S. Shashkov, Ya. A. Knirel (Moscow, U.S.S.R.), G. M. Zdorovenko, L. M. Yakovleva, N.Ya. Gubanova, and L. P. Solyanik (Kiev, U.S.S.R.) . . The methyl ether as a protective group: synthesis of aminocyclitols K. Schiirrle, B. Beier, O. Werbitzky, and W. Piepersberg (Wuppertal, F.R.G.) Preliminary communication A convenient synthesis of O-a-L-fucopyranosyl-(l-+2)-O-f-p-galactopyranosyl-(1—4)-p- glucopyranose (2’-O-a-L-fucopyranosyllactose) R. K. Jain, R. D. Locke, and K. L. Matta (Buffalo, NY, U.S.A.) Synthesis of 2,6-anhydro-3-deoxy-L-threo-hex-2-enitol (‘L-sorbal’) and of L-tagatose from b-galac- tose P. L. Barili, G. Berti, F. D'Andrea, and A. Gaudiosi (Pisa, Italy) Peroxidation of saccharide phenylhydrazones H. S. El Khadem, A. Crossman, Jr., and D. Bensen (Washington, DC, U.S.A.) Book review Announcement Author index Subject index Contents (Vol. 212)