TY  - JOUR
A1  - Tsukamoto, Junko
A1  - Haebel, Sophie
A1  - Valenca, Gustavo P.
A1  - Peter, Martin G.
A1  - FRanco, Telma T.
T1  - Enzymatic direct synthesis of acrylic acid esters of mono- and disaccharides
N2  - Background: There is an increased need to replace materials derived from fossil sources by renewables. Sugar- cane derived carbohydrates are very abundant in Brazil and are the cheapest sugars available in the market, with more than 400 million tons of sugarcane processed in the year 2007. The objective of this work was to study the prepn. of sugar acrylates from free sugars and free acrylic acid, thus avoiding the previous prepn. of protected sugar derivs., such as glycosides, or activated acrylates, such as vinyl acrylate. Results: Lipase catalyzed esterification of three mono- and two disaccharides with acrylic acid, in the presence or absence of mol. sieves was investigated. The reactions were monitored by high-performance liq. chromatog. (HPLC) and the products were analyzed by matrix-assisted laser desorption ionization-time of flight (MALDI-TOF) mass spectrometry. The main products are mono- and diacrylates, while higher esters are formed as minor products. The highest conversion to sugar acrylates was obsd. for the D-glucose and D- fructose, followed by D-xylose and D-maltose. Mol. sieves had no pronounced effect on the conversion. Conclusions: A feasible method is described to produce and to characterize sugar acrylates, including those contg. more than two acrylate groups. The process for prodn. of these higher esters could potentially be optimized further to produce mols. for crosslinking in acrylate polymn. and other applications. The direct enzymic esterification of free carbohydrates with acrylic acid is unprecedented. [on SciFinder (R)].
Y1  - 2008
UR  - http://www3.interscience.wiley.com/journal/117946200/grouphome/home.html
SN  - 0268-2575
ER  - 
TY  - JOUR
A1  - López-Franco, Yolanda L.
A1  - Calderón de la Barca, Ana M.
A1  - Valdez, Miguel A.
A1  - Peter, Martin G.
A1  - Rinaudo, Marguerite
A1  - Chambat, Gérard
A1  - Goycoolea, Francisco M.
T1  - Structural characterization of mesquite (Prosopis velutina) gum and its fractions
N2  - Structural and physicochem. characteristics of mesquite gum (from Prosopis velutina) were investigated using FT- IR spectroscopic, mass spectrometric and chromatog. methods. Four fractions (F-I, F-IIa, F-IIb and F-III) were isolated by hydrophobic interaction chromatog. The samples were characterized and analyzed for their monosaccharide and oligomers compn. by high performance anion-exchange chromatog. with pulsed amperometric detection (HPAEC-PAD). L-Arabinose (L-Ara) and D-galactose (D-Gal) were found as the main carbohydrate constituent residues in the polysaccharides from mesquite gum and their ratio (L-Ara/D-Gal) varied within the range 2.54 to 3.06 among the various fractions. Small amts. of D- glucose (D-Glc), D-mannose (D-Man) and D-xylose (D-Xyl) were also detected, particularly in Fractions IIa, IIb and III. IR spectroscopy identified polysaccharides and protein in all the samples. Data from mass spectrometry (MALDI-TOF MS) was consistent with the idea that the structure corresponding to the periphereal chains of Fraction I is predominantly a chain of pentoses attached to uronic acid. [on SciFinder (R)].
Y1  - 2008
UR  - http://www3.interscience.wiley.com/journal/77002860/home?CRETRY=1&SRETRY=0
U6  - https://doi.org/10.1002/mabi.200700285
SN  - 1616-5187
ER  - 
TY  - JOUR
A1  - Yenesew, Abiy
A1  - Twinomuhwezi, Hannington
A1  - Kiremire, Bernard T.
A1  - Mbugua, Martin N.
A1  - Gitu, Peter M.
A1  - Heydenreich, Matthias
A1  - Peter, Martin G.
T1  - 8-Methoxyneorautenol and radical scavenging flavonoids from Erythrina abyssinica
N2  - A new pterocarpan (named 8-methoxyneorautenol) was isolated from the acetone ext. of the root bark of Erythrina abyssinica. In addn., the known isoflavonoid derivs. eryvarin L, erycristagallin and shinpterocarpin were identified for the first time from the roots of this plant. The structures were detd. on the basis of spectroscopic evidence. The new compd. showed selective antimicrobial activity against Trichophyton mentagrophytes. The acetone ext. of the root bark of E. abyssinica showed radical scavenging activity towards 2,2-diphenyl-1-picrylhydrazyl radical (DPPH). The pterocarpenes, 3-hydroxy-9-methoxy-10-(3,3-dimethylallyl)pterocarpene and erycristagallin, were the most active constituents of the roots of this plant and showing dose-dependent activities similar to that of the std. quercetin. [on SciFinder (R)]
Y1  - 2009
UR  - http://www.ajol.info/journal_index.php?jid=120&ab=bcse
SN  - 1011-3924
ER  - 
TY  - JOUR
A1  - Fettke, Anja
A1  - Peikow, Dirk
A1  - Peter, Martin G.
A1  - Kleinpeter, Erich
T1  - Synthesis and conformational analysis of glycomimetic analogs of thiochitobiose
N2  - The synthesis of six analogs of N,N;-diacetylchitobiose is reported, including a novel transglycosylation reaction for the preparation of S-aryl thioglycosides. The conformations of the compounds were studied by a combination of NMR spectroscopy and molecular modeling, using force field calculations. In the case of the S-aryl thioglycosides with exclusively S-glycosidic linkages, dihedral angles of the disaccharidic S-glycosidic bonds, ;; and ;; and of the S-arylglycoside bonds, ; and ;, were found to be similar, whereas they were different in mixed glycosides and in a thiazoline derivative. An adequate correlation between the calculated H,H-distances of the local minima and the measured NOE contacts was achieved by applying population-weighted averages over participating conformers based on weighted relative energies.
Y1  - 2009
UR  - http://www.sciencedirect.com/science/journal/00404020
U6  - https://doi.org/10.1016/j.tet.2009.03.067
SN  - 0040-4020
ER  - 
TY  - JOUR
A1  - Menezes, Bruno M.
A1  - Grigolon, Lisanne
A1  - Todorovic, Zoran
A1  - Peter, Martin G.
A1  - Franco, Telma T.
T1  - On the depolymerization of chitosan by papain : a re-assessment
Y1  - 2009
ER  - 
TY  - JOUR
A1  - Oliveira, Enio N.
A1  - el Gueddari, Nour E.
A1  - Moerschbacher, Bruno M.
A1  - Peter, Martin G.
A1  - Franco, Telma T.
T1  - Growth of phytopathogenic fungi in the presence of partially acetylated chitooligosaccharides
N2  - Four phytopathogenic fungi were cultivated up to six days in media contg. chitooligosaccharide mixts. differing in av. DP and F A. The three different mixts. were named Q3 (which contained oligosaccharides of DP2-DP10, with DP2-DP7 as main components), Q2 (which contained oligosaccharides of DP2-DP12, with DP2-DP10 as main components) and Q1 (which derived from Q2 and contained oligomers of DP5-DP8 with hexamer and a heptamer as the main components). The novel aspect of this work is the description of the effect of mixts. of oligosaccharides with different and known compn. on fungal growth rates. The growth rate of Alternaria alternata and Rhizopus stolonifer was initially inhibited by Q3 and Q2 at higher concns. Q1 had a growth stimulating effect on these two fungi. Growth of Botrytis cinerea was inhibited by Q3 and Q2, while Q1 had no effect on the growth of this fungus. Growth of Penicillium expansum was only slightly inhibited by higher concns. of sample Q3, while Q2 and Q1 had no effect. The inhibition of growth rates or their resistance toward chitooligosaccharides correlated with the absence or presence of chitinolytic enzymes in the culture media, resp. [on SciFinder (R)]
Y1  - 2008
UR  - http://www.springerlink.com/content/102966
SN  - 0301-486X
ER  - 
TY  - JOUR
A1  - Bringmann, Gerhard
A1  - Mutanyatta-Comar, Joan
A1  - Maksimenka, Katja
A1  - Wanjohi, John M.
A1  - Heydenreich, Matthias
A1  - Brun, Reto
A1  - Müller, Werner E. G.
A1  - Peter, Martin G.
A1  - Midiwo, Jacob O.
A1  - Yenesew, Abiy
T1  - Joziknipholones A and B : the first dimeric phenylanthraquinones, from the roots of Bulbine frutescens
N2  - From the roots of the African plant Bulbine frutescens (Asphodelaceae), two unprecedented novel dimeric phenylanthraquinones, named joziknipholones A and B, possessing axial and centrochirality, were isolated, together with six known compounds. Structural elucidation of the new metabolites was achieved by spectroscopic and chiroptical methods, by reductive cleavage of the central bond between the monomeric phenylanthraquinone and -anthrone portions with sodium dithionite, and by quantum chemical CD calculations. Based on the recently revised absolute axial configuration of the parent phenylanthraquinones, knipholone and knipholone anthrone, the new dimers were attributed to possess the P- configuration (i.e., with the acetyl portions below the anthraquinone plane) at both axes in the case of joziknipholone A, whereas in joziknipholone B, the knipholone part was found to be M-configured. Joziknipholones A and B are active against the chloroquine resistant strain K1 of the malaria pathogen, Plasmodium falciparum, and show moderate activity against murine leukemic lymphoma L5178y cells.
Y1  - 2008
UR  - http://www3.interscience.wiley.com/journal/26293/home?CRETRY=1&SRETRY=0
SN  - 0947-6539
ER  - 
TY  - JOUR
A1  - Rukunga, G. M.
A1  - Muregi, F. W.
A1  - Omar, S. A.
A1  - Gathirwa, J. W.
A1  - Muthaura, C. N.
A1  - Peter, Martin G.
T1  - Anti-plasmodial activity of the extracts and two sesquiterpenes from Cyperus articulatus
N2  - Two sesquiterpenes, corymbolone and mustakone, isolated from the chloroform extract of the rhizomes of Cyperus articulatus, exhibited significant anti-plasmodial properties. Mustakone was approximately ten times more active than corymbolone against the sensitive strains of the Plasmodium falciparum.
Y1  - 2008
SN  - 0367-326X
ER  - 
TY  - JOUR
A1  - Issaree, Arisara
A1  - Vijayakrishnan, Balakumar
A1  - Abdelnur, Patricia V.
A1  - Corilo, Yuri E.
A1  - Riccio, Maria F.
A1  - Sanvido, Gustavo B.
A1  - Eberlin, Marcos N.
A1  - Peter, Martin G.
T1  - Mass spectrometry of aminoglucan oligosaccharides using electrospray ionization MS/MS and MS/MS/MS
Y1  - 2009
ER  - 
TY  - JOUR
A1  - Peter, Martin G.
A1  - Ley, J. P.
A1  - Petersen, Stefan
A1  - Londershausen, M.
A1  - Schumacher-Wandersleb, Michael H. M. G.
A1  - Spindler, Klaus-Dieter
A1  - Spindler-Barth, Margarethe
A1  - Turberg, Andreas
T1  - Synthesis of chitinase inhibitors
Y1  - 1994
ER  - 
TY  - JOUR
A1  - Krösche, Christian
A1  - Crescenzi, Orlando
A1  - Hoffbauer, Wilfried
A1  - Jansen, Martin
A1  - Napolitano, Alessandra
A1  - Prota, Guiseppe
A1  - Peter, Martin G.
T1  - Synthesis of dopamines labelled with 13C in the alpha- or beta-side chain positions, and their application for structure studies on melanins by solid state NMR spectroscopy
Y1  - 1994
ER  - 
TY  - JOUR
A1  - Schumacher-Wandersleb, Michael H. M. G.
A1  - Petersen, Stefan
A1  - Peter, Martin G.
T1  - Preparation of the N-Acetylglucosaminidase inhibitor 1-Acetamido-1,2,5-tride oxy-2,5-imino-D-glucitol from methyl a-D-Mannopyranoside
Y1  - 1994
ER  - 
TY  - JOUR
A1  - Peter, Martin G.
A1  - Andersen, S. O.
T1  - The molecular architecture of the insect exoskeleton
Y1  - 1994
ER  - 
TY  - JOUR
A1  - Ley, J. P.
A1  - Peter, Martin G.
T1  - Synthesis of N-(2-Acetamido-2-deoxy-ß-D-glucopyranosyl)- and of N-(N,N-Diacetylchitobiosyl)-amide of lhistidine
Y1  - 1994
SN  - 0039-7881
ER  - 
TY  - JOUR
A1  - Schumacher-Wandersleb, Michael H. M. G.
A1  - Peter, Martin G.
T1  - Synthesis of chitobiosyl pyrrolidines
Y1  - 1995
ER  - 
TY  - JOUR
A1  - Peter, Martin G.
A1  - Merz, A.
T1  - Stereoselective benzylic deprotonation in the enzymatic rearrangement of N-acetyldopamine derived o-Quinone to the p-Quinone methide
Y1  - 1995
SN  - 0957-4166
ER  - 
TY  - JOUR
A1  - Peter, Martin G.
T1  - Chitin in den Startlöchern
Y1  - 1995
SN  - 0009-2959
ER  - 
TY  - JOUR
A1  - Peter, Martin G.
T1  - Chemistry and biochemistry of the insect exoskeleton
Y1  - 1995
ER  - 
TY  - JOUR
A1  - Peter, Martin G.
T1  - Chemie i Biochemia Zewnetrznego Szkieletu Owadow : (Chemistry and biochemistry of the insect exoskeleton)
Y1  - 1995
ER  - 
TY  - JOUR
A1  - Peter, Martin G.
T1  - The Bio-organic chemistry of melanogenesis
Y1  - 1995
ER  - 
TY  - JOUR
A1  - Abegaz, Berhanu M.
A1  - Peter, Martin G.
T1  - Emodine and emodinanthrone rhamnoside acetates from fruits of rhamnus prinoides
Y1  - 1995
SN  - 0031-9422
ER  - 
TY  - JOUR
A1  - Peter, Martin G.
T1  - Applications and environmental aspects of chitin and chitosan
Y1  - 1995
SN  - 0022-233X
ER  - 
TY  - JOUR
A1  - Buss, U.
A1  - Varum, K. M.
A1  - Peter, Martin G.
A1  - Spindler-Barth, Margarethe
T1  - ELISA for quantitation of chitin, chitosan and related compounds
Y1  - 1996
ER  - 
TY  - JOUR
A1  - Ley, J. P.
A1  - Peter, Martin G.
T1  - Synthesis of L-histidine and (-)-spinacine chitooligosyl amides
Y1  - 1996
ER  - 
TY  - JOUR
A1  - Krösche, Ch.
A1  - Peter, Martin G.
T1  - Detection of melanochromes by MALDI-TOF mass spectrometry
Y1  - 1996
ER  - 
TY  - JOUR
A1  - Andersen, S. O.
A1  - Peter, Martin G.
A1  - Roepstorff, Peter
T1  - Cuticular sclerotization in insects
Y1  - 1996
ER  - 
TY  - JOUR
A1  - Londershausen, M.
A1  - Turberg, Andreas
A1  - Spindler-Barth, Margarethe
A1  - Peter, Martin G.
T1  - Screening Test for Insecticides Interfering with Cuticular Sclerotization
Y1  - 1996
ER  - 
TY  - JOUR
A1  - Londershausen, M.
A1  - Turberg, Andreas
A1  - Bieseler, Barbara
A1  - Lennarz, M.
A1  - Peter, Martin G.
T1  - Characterization and Inhibitor Studies of Chitinases from Parasitic Blowfly (Lucilia cuprina), Tick (Boophilus micoplus), Intestinale Nematode (Haemonchus contortus), and a Bean (Phaseolus vulgaris)
Y1  - 1996
ER  - 
TY  - JOUR
A1  - Peter, Martin G.
A1  - Miessner, Merle
T1  - Primärstoffwechsel, Shikimat- und Phenylpropan-Gruppe, Vitamine, Coenzyme, Pflanzeninhaltsstoffe
Y1  - 1997
ER  - 
TY  - JOUR
A1  - Schanzenbach, Dirk
A1  - Peter, Martin G.
T1  - Chromatography of chito-oligosaccarides
Y1  - 1997
ER  - 
TY  - JOUR
A1  - Ley, J. P.
A1  - Schweikart, F.
A1  - Peter, Martin G.
T1  - Chitinase inhibitors
Y1  - 1997
ER  - 
TY  - JOUR
A1  - Schanzenbach, Dirk
A1  - Matern, Christa-Maria
A1  - Peter, Martin G.
T1  - Synthesis of glycosylamines and glycopeptides
Y1  - 1997
ER  - 
TY  - JOUR
A1  - Schanzenbach, Dirk
A1  - Peter, Martin G.
T1  - NMR spectroscopy of chito-oligosaccharides
Y1  - 1997
ER  - 
TY  - JOUR
A1  - Schanzenbach, Dirk
A1  - Matern, Christa-Maria
A1  - Peter, Martin G.
T1  - Cleavage of chitin by means of sulfurice acid/acetc anhydride and isolation of peracetylated chito- oligosaccharides
Y1  - 1997
ER  - 
TY  - JOUR
A1  - Ratajska, M.
A1  - Struszczyk, Marcin Henryk
A1  - Boryniec, Stefan
A1  - Peter, Martin G.
A1  - Loth, Fritz
T1  - The degree of acetylation of chitosan : optimization of the IR Method
Y1  - 1997
ER  - 
TY  - JOUR
A1  - Peter, Martin G.
A1  - Wollenberger, Ursula
T1  - Phenol-oxidizing enzymes : mechanisms and applications
Y1  - 1997
ER  - 
TY  - JOUR
A1  - Haebel, Sophie
A1  - Peter-Katalinic, Jasna
A1  - Peter, Martin G.
T1  - Mass spectrometry of chitooligosaccharides
Y1  - 1997
SN  - 88-86889- 01-1
ER  - 
TY  - JOUR
A1  - Struszczyk, Marcin Henryk
A1  - Ratajska, M.
A1  - Boryniec, Stefan
A1  - Peter, Martin G.
A1  - Loth, Fritz
T1  - The determination of the degree of N-acetylation of chitosan
Y1  - 1997
ER  - 
TY  - JOUR
A1  - Struszczyk, Marcin Henryk
A1  - Loth, Fritz
A1  - Peter, Martin G.
T1  - Analysis of deacetylation deree in chitosans from various sources
Y1  - 1998
ER  - 
TY  - JOUR
A1  - Struszczyk, Marcin Henryk
A1  - Loth, Fritz
A1  - Köhler, L. A.
A1  - Peter, Martin G.
T1  - Characterization of chitosan
Y1  - 1998
ER  - 
TY  - JOUR
A1  - Berth, Gisela
A1  - Dautzenberg, Herbert
A1  - Peter, Martin G.
T1  - Physico-chemical characterization of chitosans varying in degree of acetylation
Y1  - 1998
SN  - 0144-8617
ER  - 
TY  - JOUR
A1  - Yenesew, Abiy
A1  - Midiwo, Jacob O.
A1  - Heydenreich, Matthias
A1  - Peter, Martin G.
T1  - Four isoflavanones from stem bark of erythrina sacleuxii
Y1  - 1998
ER  - 
TY  - JOUR
A1  - Yenesew, Abiy
A1  - Midiwo, Jacob O.
A1  - Meisner, M.
A1  - Heydenreich, Matthias
A1  - Peter, Martin G.
T1  - Two prenylated flavanones from stem bark of erythrina burttii
Y1  - 1998
ER  - 
TY  - JOUR
A1  - Streffer, Katrin
A1  - Kaatz, Helvi
A1  - Bauer, Christian G.
A1  - Makower, Alexander
A1  - Schulmeister, Thomas
A1  - Scheller, Frieder W.
A1  - Peter, Martin G.
A1  - Wollenberger, Ursula
T1  - Application of a sensitive catechol detector for determination of tyrosinase inhibitors
Y1  - 1998
ER  - 
TY  - JOUR
A1  - Struszczyk, Marcin Henryk
A1  - Loth, Fritz
A1  - Peter, Martin G.
T1  - Calibration of methods for the determination of the degree of decatetylation of chitosan
Y1  - 1998
ER  - 
TY  - JOUR
A1  - Alarcon, Julio
A1  - Alderete, Joel B.
A1  - Peter, Martin G.
A1  - Becerra, Juan J.
A1  - Silva, M.
T1  - Study on synthesis of 3 alpha,4 alpha-dihydroxy-dihydro-beta-agarofuran
Y1  - 1998
ER  - 
TY  - JOUR
A1  - Kamlage, Stefan
A1  - Sefkow, Michael
A1  - Peter, Martin G.
T1  - Cross coupling of benzylic bromides and vinyl stannanes
Y1  - 1999
ER  - 
TY  - JOUR
A1  - Kaatz, Helvi
A1  - Streffer, Katrin
A1  - Wollenberger, Ursula
A1  - Peter, Martin G.
T1  - Inhibition of mushroom tyrosinase by kojic acid octanoates
Y1  - 1999
ER  - 
TY  - JOUR
A1  - Struszczyk, Marcin Henryk
A1  - Loth, Fritz
A1  - Peter, Martin G.
T1  - Method of microcrystalline chitosan-protein films preparation
Y1  - 1999
ER  - 
TY  - JOUR
A1  - Rottmann, Antje
A1  - Synstad, Bjoenar
A1  - Thiele, G.
A1  - Schanzenbach, Dirk
A1  - Eijsink, Vincent G. H.
A1  - Peter, Martin G.
T1  - Approaches towards the design of new chitinase inhibitors
Y1  - 1999
SN  - 3-9806494-5-8
ER  -