@misc{MoerschbacherJaworskaPeter2020,
  author    = {Moerschbacher, Bruno and Jaworska, Małgorzata and Peter, Martin G.},
  title     = {Obituary of George A.F. Roberts (1939-2018)},
  series = {Reactive \& functional polymers},
  volume    = {156},
  journal   = {Reactive \& functional polymers},
  publisher = {Elsevier},
  address   = {Amsterdam [u.a.]},
  issn      = {1381-5148},
  doi       = {10.1016/j.reactfunctpolym.2020.104711},
  pages     = {3},
  year      = {2020},
  language  = {en}
}
@article{PereiraNascimentoMagalhaesetal.2014,
  author    = {Pereira, Fernanda S. and Nascimento, Heliara D. L. and Magalhaes, Alvicler and Peter, Martin G. and Bataglion, Giovana Anceski and Eberlin, Marcos N. and Gonzalez, Eduardo R. P.},
  title     = {ESI(+)-MS and GC-MS study of the hydrolysis of N-azobenzyl derivatives of chitosan},
  series = {Molecules},
  volume    = {19},
  journal   = {Molecules},
  number    = {11},
  publisher = {MDPI},
  address   = {Basel},
  issn      = {1420-3049},
  doi       = {10.3390/molecules191117604},
  pages     = {17604 -- 17618},
  year      = {2014},
  abstract  = {New N-p-chloro-, N-p-bromo-, and N-p-nitrophenylazobenzylchitosan derivatives, as well as the corresponding azophenyl and azophenyl-p-sulfonic acids, were synthesized by coupling N-benzylvchitosan with aryl diazonium salts. The synthesized molecules were analyzed by UV-Vis, FT-IR, H-1-NMR and N-15-NMR spectroscopy. The capacity of copper chelation by these materials was studied by AAS. Chitosan and the derivatives were subjected to hydrolysis and the products were analyzed by ESI(+)-MS and GC-MS, confirming the formation of N-benzyl chitosan. Furthermore, the MS results indicate that a nucleophilic aromatic substitution (SnAr) reaction occurs under hydrolysis conditions, yielding chloroaniline from N-p-bromo-, and N-p-nitrophenylazo-benzylchitosan as well as bromoaniline from N-p-chloro-, and N-p-nitrophenylazobenzyl-chitosan.},
  language  = {en}
}
@article{FasciottiSanvidoSantosetal.2012,
  author    = {Fasciotti, Maira and Sanvido, Gustavo B. and Santos, Vanessa G. and Lalli, Priscila M. and McCullagh, Michael and de Sa, Gilberto F. and Daroda, Romeu J. and Peter, Martin G. and Eberlin, Marcos N.},
  title     = {Separation of isomeric disaccharides by traveling wave ion mobility mass spectrometry using CO2 as drift gas},
  series = {Journal of mass spectrometr},
  volume    = {47},
  journal   = {Journal of mass spectrometr},
  number    = {12},
  publisher = {Wiley-Blackwell},
  address   = {Hoboken},
  issn      = {1076-5174},
  doi       = {10.1002/jms.3089},
  pages     = {1643 -- 1647},
  year      = {2012},
  abstract  = {The use of CO2 as a massive and polarizable drift gas is shown to greatly improve peak-to-peak resolution (Rp-p), as compared with N2, for the separation of disaccharides in a Synapt G2 traveling wave ion mobility cell. Near or baseline Rp-p was achieved for three pairs of sodiated molecules of disaccharide isomers, that is, cellobiose and sucrose (Rp-p?=?0.76), maltose and sucrose (Rp-p?=?1.04), and maltose and lactose (Rp-p?=?0.74). Ion mobility mass spectrometry using CO2 as the drift gas offers therefore an attractive alternative for fast and efficient separation of isomeric disaccharides.},
  language  = {en}
}
@article{PazPeterSchmidtetal.2012,
  author    = {Paz, Cristian and Peter, Martin G. and Schmidt, Bernd and Becerra, Jose and Gutierrez, Margarita and Astudillo, Luis and Silva, Mario},
  title     = {Synthesis and AChE inhibiting activity of 2, 4 substituted 6-Phenyl Pyrimidines},
  series = {Journal of the Chilean Chemical Society},
  volume    = {57},
  journal   = {Journal of the Chilean Chemical Society},
  number    = {3},
  publisher = {Sociedad Chilena De Quimica},
  address   = {Concepcion},
  issn      = {0717-9324},
  pages     = {1292 -- 1294},
  year      = {2012},
  abstract  = {Novel substituted pyrimidines were synthesized from methyl 2,4-dioxo-4-phenyl-butanoate (I-A) and urea, followed by Mitsunobu coupling of I-A with benzyl or allyl alcohol to give the corresponding 2-hydroxypyrimidine ethers in good yields. Saponification of I-A, followed by reaction with benzyl or allyl amines in the presence of TBTU yielded 2-hydroxy-6-phenyl-pyrimidine 4-carboxamides. AChE and BuChE assays revealed 2-hydroxy-6-phenyl-pyrimidine-4-carboxyallyamide as the most active compound, IC50=90 mu M, with no inhibition of BuChE.},
  language  = {en}
}
@article{VijayakrishnanIssareeCoriloetal.2011,
  author    = {Vijayakrishnan, Balakumar and Issaree, Arisara and Corilo, Yuri E. and Ferreira, Christina Ramires and Eberlin, Marcos N. and Peter, Martin G.},
  title     = {MSn of the six isomers of (GlcN)(2)(GlcNAc)(2) aminoglucan tetrasaccharides (diacetylchitotetraoses) rules of fragmentation for the sodiated molecules and application to sequence analysis of hetero-chitooligosaccharides},
  series = {Carbohydrate polymers : an international journal devoted to scientific and technological aspects of industrially important polysaccharides},
  volume    = {84},
  journal   = {Carbohydrate polymers : an international journal devoted to scientific and technological aspects of industrially important polysaccharides},
  number    = {2},
  publisher = {Elsevier},
  address   = {Oxford},
  issn      = {0144-8617},
  doi       = {10.1016/j.carbpol.2010.04.041},
  pages     = {713 -- 726},
  year      = {2011},
  abstract  = {The six possible isomers of di-N-acetylchitotetraoses [AADD, ADDA, ADAD, DADA, DAAD, and DDAA, where D stands for 2-amino-2-deoxy-3-D-glucose (GlcN) and A for 2-acetamido-2-deoxy-beta-D-glucose (GlcNAc)] were analyzed by ESI(+)-MSn. Collision induced dissociation via MSn experiments were performed for the sodiated molecules of m/z 769 [M+Na](+) for each isomer, and fragments were generated mainly by glycosidic bond and cross-ring cleavages. Rules of fragmentation were then established. A reducing end D residue yields the (O.2)A(4) cross-ring [M-59+Na](+) fragment of m/z 710 as the most abundant, whereas isomers containing a reducing end A prefer to lose water to form the [M-18+Na](+) ion of m/z 751, as well as abundant (O.2)A(4) cross-ring [M-101+Na](+) fragments of m/z 668 and B-3 [M-221+Na](+) ions of m/z 548. MS3 of C- and Y-type ions shows analogous fragmentation behaviour that allows identification of the reducing end next-neighbour residue. Due to gas-phase anchimeric assistance, B-type cleavage between the glycosidic oxygen and the anomeric carbon atom is favoured when the glycon is an A residue. Relative ion abundances are generally in the order B >> C > Y, but may vary depending on the next neighbour towards the non-reducing end. These fragmentation rules were used for partial sequence analysis of hetero-chitooligosaccharides of the composition D(2)A(3), D(3)A(3), D(2)A(4), D(4)A(3), and D(3)A(4).},
  language  = {en}
}
@article{MengibarGananMirallesetal.2011,
  author    = {Mengibar, M. and Ganan, M. and Miralles, B. and Carrascosa, A. V. and Martinez-Rodriguez, Adolfo J. and Peter, Martin G. and Heras, A.},
  title     = {Antibacterial activity of products of depolymerization of chitosans with lysozyme and chitosanase against Campylobacter jejuni},
  series = {Carbohydrate polymers : an international journal devoted to scientific and technological aspects of industrially important polysaccharides},
  volume    = {84},
  journal   = {Carbohydrate polymers : an international journal devoted to scientific and technological aspects of industrially important polysaccharides},
  number    = {2},
  publisher = {Elsevier},
  address   = {Oxford},
  issn      = {0144-8617},
  doi       = {10.1016/j.carbpol.2010.04.042},
  pages     = {844 -- 848},
  year      = {2011},
  abstract  = {Chitosan has several biological properties useful for the food industry, but the most attractive is its potential use as a food preservative of natural origin due to its antimicrobial activity against a wide range of food-borne microorganisms. Among food-borne pathogens, Campylobacter jejuni and related species are recognised as the most common causes of bacterial food-borne diarrhoeal disease throughout the world. Recently, it has been demonstrated that campylobacters are highly sensitive to chitosan. Even though chitosan is known to have important functional activities, poor solubility makes them difficult to use in food and biomedical applications. Unlike chitosan, the low viscosity and good solubility of chitosan oligosaccharides (COS) make them especially attractive in an important number of useful applications. In the present work, the effect of different COS on C. jejuni was investigated. Variables such as the physicochemical characteristics of chitosan and the enzyme used in COS preparation were studied. The COS had been fractioned using ultrafiltration membranes and each fraction was characterized regarding its FA and molecular weight distribution. It has been demonstrated that the biological properties of COS on Campylobacter depend on the composition of the fraction analysed. COS prepared by enzymatic hydrolysis with chitosanase were more active against Campylobacter that lysozyme-derived COS, and this behaviour seems to be related with the acetylation of the chains. On the other hand. the 10-30 kDa fraction was the most active COS fraction, independently of the enzyme used for the hydrolysis. These results have shown that COS could be useful as antimicrobial in the control of C. jejuni.},
  language  = {en}
}
@article{JumaAkalaEyaseetal.2011,
  author    = {Juma, Wanyama P. and Akala, Hoseah M. and Eyase, Fredrick L. and Muiva, Lois M. and Heydenreich, Matthias and Okalebo, Faith A. and Gitu, Peter M. and Peter, Martin G. and Walsh, Douglas S. and Imbuga, Mabel and Yenesew, Abiy},
  title     = {Terpurinflavone an antiplasmodial flavone from the stem of Tephrosia Purpurea},
  series = {Phytochemistry letters},
  volume    = {4},
  journal   = {Phytochemistry letters},
  number    = {2},
  publisher = {Elsevier},
  address   = {Amsterdam},
  issn      = {1874-3900},
  doi       = {10.1016/j.phytol.2011.02.010},
  pages     = {176 -- 178},
  year      = {2011},
  abstract  = {The stem extract of Tephrosia purpurea showed antiplasmodial activity against the D6 (chloroquine-sensitive) and W2 (chloroquine-resistant) strains of Plasmodium falciparum with IC(50) values of 10.47 +/- 2.22 mu g/ml and 12.06 +/- 2.54 mu g/ml, respectively. A new prenylated flavone, named terpurinflavone, along with the known compounds lanceolatin A, (-)-semiglabrin and lanceolatin B have been isolated from this extract. The new compound, terpurinflavone, showed the highest antiplasmodial activity with IC(50) values of 3.12 +/- 0.28 mu M (D6) and 6.26 +/- 2.66 mu M (W2). The structures were determined on the basis of spectroscopic evidence.},
  language  = {en}
}
@article{YenesewTwinomuhweziKiremireetal.2009,
  author    = {Yenesew, Abiy and Twinomuhwezi, Hannington and Kiremire, Bernard T. and Mbugua, Martin N. and Gitu, Peter M. and Heydenreich, Matthias and Peter, Martin G.},
  title     = {8-Methoxyneorautenol and radical scavenging flavonoids from Erythrina abyssinica},
  issn      = {1011-3924},
  year      = {2009},
  abstract  = {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)]},
  language  = {en}
}
@article{MenezesGrigolonTodorovicetal.2009,
  author    = {Menezes, Bruno M. and Grigolon, Lisanne and Todorovic, Zoran and Peter, Martin G. and Franco, Telma T.},
  title     = {On the depolymerization of chitosan by papain : a re-assessment},
  year      = {2009},
  language  = {en}
}
@article{IssareeVijayakrishnanAbdelnuretal.2009,
  author    = {Issaree, Arisara and Vijayakrishnan, Balakumar and Abdelnur, Patricia V. and Corilo, Yuri E. and Riccio, Maria F. and Sanvido, Gustavo B. and Eberlin, Marcos N. and Peter, Martin G.},
  title     = {Mass spectrometry of aminoglucan oligosaccharides using electrospray ionization MS/MS and MS/MS/MS},
  year      = {2009},
  language  = {en}
}