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  • 1
    facet.materialart.
    Unbekannt
    The genus Sanguisorba (Rosaceae) in India (1984)
    In:  Blumea: Biodiversity, Evolution and Biogeography of Plants vol. 30 no. 1, pp. 51-68
    Details
    Publikationsdatum: 2024-01-12
    Beschreibung: Sanguisorba L. emend. Nordboig is represented in India by five taxa: S. officinalis L. subsp. longifolia (Bertol.) Purohit & Panigrahi, stat. nov., S. diandra (Hook. f.) Wallich ex Nordborg var. diandra, S. diandra var. villosa Purohit & Panigrahi, var. nov., S. filiformis (Hook, f.) Hand.-Mazz. and S. minor Scop. subsp. minor, of which S. minor is a new record for India. A key to the Indian taxa is provided, nomenclature and typification discussed; cytological, palynological, ecological data and notes on economic uses, wherever available, are furnished, range of distribution indicated and specimens examined, cited.
    Repository-Name: National Museum of Natural History, Netherlands
    Materialart: info:eu-repo/semantics/article
    Format: application/pdf
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    ARTIKEL (OA)
  • 2
    Digitale Medien
    Digitale Medien
    Use of monoacetyl-4-hydroxyaminoquinoline 1-oxide to probe contacts between guanines and protein in the minor and major grooves of DNA. Interaction of Escherichia coli integration host factor with its recognition site in the early promoter and transposition enhancer of bacteriophage Mu (1991)
    s.l. : American Chemical Society
    Biochemistry 30 (1991), S. 9761-9767 
    Details
    ISSN: 1520-4995
    Quelle: ACS Legacy Archives
    Thema: Biologie , Chemie und Pharmazie
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1021/bi00104a028
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  • 3
    Digitale Medien
    Digitale Medien
    The N2-guanine adduct but not the C8-guanine of N6-adenine adducts formed by 4-nitroquinoline 1-oxide blocks the 3'-5' exonuclease action of T4 DNA polymerase (1990)
    s.l. : American Chemical Society
    Biochemistry 29 (1990), S. 2122-2126 
    Details
    ISSN: 1520-4995
    Quelle: ACS Legacy Archives
    Thema: Biologie , Chemie und Pharmazie
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1021/bi00460a023
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  • 4
    Digitale Medien
    Digitale Medien
    Cytology of Some Genera of Polypodiaceae in Eastern India (1961)
    [s.l.] : Nature Publishing Group
    Nature 191 (1961), S. 1207-1208 
    Details
    ISSN: 1476-4687
    Quelle: Nature Archives 1869 - 2009
    Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik
    Notizen: [Auszug] Although Manton3 has worked out the cytology of 40 species, mostly from Ceylon and Malaya, none of the Indian plants belonging to the family Polypodiaceae (sensu Copeland, 1947) has yet been studied cytologically (the first report of the basic number in Paraleptochilus decurrens (Bl.) Copel. from ...
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1038/1911207a0
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  • 5
    Digitale Medien
    Digitale Medien
    Kinetic and mechanistic studies on the oxidation of sulfanilic acid by peroxomonophosphoric acid (1982)
    Springer
    Reaction kinetics and catalysis letters 21 (1982), S. 283-287 
    Details
    ISSN: 1588-2837
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie
    Beschreibung / Inhaltsverzeichnis: Abstract Окисление сульфаниловой кислоты до соответствующего азокси-производного с помощью пероксомонофосфорной кислоты (PMPA) было исследовано в водном растворе. Наблюдаемая зависимость pH—скорость с профилем колокола интерпретировалась на основе протонирования аминогруппы, ионизации PMPA в различные частицы и подбирая соответствующий закон скорости. Механизм окисления заключает в себе нуклеофильную атаку азота на электрофильный пероксокислород.
    Notizen: Abstract Oxidation of sulfanilic acid to the corresponding azoxy derivative by peroxomonophosphoric acid (PMPA) has been studied in aqueous medium. The observed bell-shaped pH-rate profile has been rationalized on the basis of protonation of the amino group and ionization into different PMPA species and a suitable rate law has been proposed. The mechanism of oxidation involves the nucleophilic attack of nitrogen on the electrophilic peroxo oxygen.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02070626
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  • 6
    Digitale Medien
    Digitale Medien
    Oxidation studies with peroxomonophosphoric acid. II. A kinetic and mechanistic study of dimethyl sulfoxide oxidation in acid and alkaline mediaPart I appeared in Bulletin ofthe Chemical Society of Japan, 52, 3084 (1979); see [1]. (1980)
    New York, NY : Wiley-Blackwell
    International Journal of Chemical Kinetics 12 (1980), S. 491-499 
    Details
    ISSN: 0538-8066
    Schlagwort(e): Chemistry ; Physical Chemistry
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Notizen: The kinetics of dimethyl sulfoxide (DMSO) oxidation by peroxomonophosphoric acid (PMPA) in aqueous medium at 308 K and I = 0.4 mol/dm3 follow the rate expressions In the pH range from 0 to 2, where k1 and k2 are 5.092 × 10-1 dm3/mol sec and ≃ 0, respectively; in the pH range from 4 to 7, where k2 = 8.127 × 10-3 and k3 = 2.90 × 10-3 dm3/mol sec; and in the pH range from 10 to 13.6, where k4 ≃ 0, and k5 = 3.08 × 10-2 dm3/mol sec.The reaction is interpreted in terms of mechanisms involving an electrophilic and a nucleophilic attack of the peroxomonophosphoric acid species, respectively, in acid and alkaline regions, on the sulfur atom of the sulfoxide molecule giving rise to SN2-type transition states followed by oxygen-oxygen bond fission to form the products.
    Zusätzliches Material: 2 Tab.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/kin.550120705
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  • 7
    Digitale Medien
    Digitale Medien
    Pyridiniumchlorochromate oxidations: Studies on the kinetics and substituent effect in the oxidation of aniline in nonaqueous systems (1982)
    New York, NY : Wiley-Blackwell
    International Journal of Chemical Kinetics 14 (1982), S. 977-984 
    Details
    ISSN: 0538-8066
    Schlagwort(e): Chemistry ; Physical Chemistry
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Notizen: Pyridiniumchlorochromate (PCC) oxidizes aniline and substituted anilines except nitro anilines smoothly in chlorobenzene-nitrobenzene mixtures in the presence of dichloroacetic acid. The reaction has unit dependence on each of the aniline, PCC, and dichloroacetic acid concentrations. Electron-releasing substituents accelerate the reaction, whereas electronwithdrawing groups retard the reaction, and the rate data obey Hammett's relationship. The reaction constant ρ is -3.75. Azobenzene and p-benzoquinone have been obtained as products. The observed experimental data have been rationalized in terms of the formation of an intermediate complex involving PCC-amine undergoing a rapid decomposition to products.
    Zusätzliches Material: 4 Tab.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/kin.550140903
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  • 8
    Digitale Medien
    Digitale Medien
    On the Michaelis-Menten behavior of pyridinium chloro chromate oxidations: Oxidation of dimethyl, dipropyl, and diphenyl sulfide in chlorobenzene-nitrobenzene mixtures (1981)
    New York, NY : Wiley-Blackwell
    International Journal of Chemical Kinetics 13 (1981), S. 85-96 
    Details
    ISSN: 0538-8066
    Schlagwort(e): Chemistry ; Physical Chemistry
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Notizen: The kinetics of oxidation of dimethyl, dipropyl, and diphenyl sulfides by pyridinium chloro chromate in chlorobenzene-nitrobenzene mixtures are reported. The rate data show Michaelis-Menten behavior. The oxidation process is catalyzed by the organic acids like dichloro and trichloro acetic acids. The rate-determining step appears to be a unimolecular decomposition of a complex of the reactants.
    Zusätzliches Material: 1 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/kin.550130108
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  • 9
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    Unbekannt
    Slipped Trinucleotide Repeat Repair by MutL{alpha} [Molecular Bases of Disease] (2012)
    The American Society for Biochemistry and Molecular Biology (ASBMB)
    Details
    Publikationsdatum: 2012-12-08
    Beschreibung: Mismatch repair (MMR) is required for proper maintenance of the genome by protecting against mutations. The mismatch repair system has also been implicated as a driver of certain mutations, including disease-associated trinucleotide repeat instability. We recently revealed a requirement of hMutSβ in the repair of short slip-outs containing a single CTG repeat unit (1). The involvement of other MMR proteins in short trinucleotide repeat slip-out repair is unknown. Here we show that hMutLα is required for the highly efficient in vitro repair of single CTG repeat slip-outs, to the same degree as hMutSβ. HEK293T cell extracts, deficient in hMLH1, are unable to process single-repeat slip-outs, but are functional when complemented with hMutLα. The MMR-deficient hMLH1 mutant, T117M, which has a point mutation proximal to the ATP-binding domain, is defective in slip-out repair, further supporting a requirement for hMLH1 in the processing of short slip-outs and possibly the involvement of hMHL1 ATPase activity. Extracts of hPMS2-deficient HEC-1-A cells, which express hMLH1, hMLH3, and hPMS1, are only functional when complemented with hMutLα, indicating that neither hMutLβ nor hMutLγ is sufficient to repair short slip-outs. The resolution of clustered short slip-outs, which are poorly repaired, was partially dependent upon a functional hMutLα. The joint involvement of hMutSβ and hMutLα suggests that repeat instability may be the result of aberrant outcomes of repair attempts.
    Print ISSN: 0021-9258
    Digitale ISSN: 1083-351X
    Thema: Biologie , Chemie und Pharmazie
    Publiziert von The American Society for Biochemistry and Molecular Biology (ASBMB)
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  • 10
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    Unbekannt
    Processing of double-R-loops in (CAG){middle dot}(CTG) and C9orf72 (GGGGCC){middle dot}(GGCCCC) repeats causes instability (2014)
    Oxford University Press
    Details
    Publikationsdatum: 2014-09-17
    Beschreibung: R-loops, transcriptionally-induced RNA:DNA hybrids, occurring at repeat tracts (CTG) n , (CAG) n , (CGG) n , (CCG) n and (GAA) n , are associated with diseases including myotonic dystrophy, Huntington's disease, fragile X and Friedreich's ataxia. Many of these repeats are bidirectionally transcribed, allowing for single- and double-R-loop configurations, where either or both DNA strands may be RNA-bound. R-loops can trigger repeat instability at (CTG)·(CAG) repeats, but the mechanism of this is unclear. We demonstrate R-loop-mediated instability through processing of R-loops by HeLa and human neuron-like cell extracts. Double-R-loops induced greater instability than single-R-loops. Pre-treatment with RNase H only partially suppressed instability, supporting a model in which R-loops directly generate instability by aberrant processing, or via slipped-DNA formation upon RNA removal and its subsequent aberrant processing. Slipped-DNAs were observed to form following removal of the RNA from R-loops. Since transcriptionally-induced R-loops can occur in the absence of DNA replication, R-loop processing may be a source of repeat instability in the brain. Double-R-loop formation and processing to instability was extended to the expanded C9orf72 (GGGGCC)·(GGCCCC) repeats, known to cause amyotrophic lateral sclerosis and frontotemporal dementia, providing the first suggestion through which these repeats may become unstable. These findings provide a mechanistic basis for R-loop-mediated instability at disease-associated repeats.
    Print ISSN: 0305-1048
    Digitale ISSN: 1362-4962
    Thema: Biologie
    Publiziert von Oxford University Press
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