180 research outputs found

    Kinetics of Oxidation of Cinnamyl Alcohol with Chloramine- T in Hydrochloric Acid Medium

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    808-81

    Kinetics and mechanism of oxidation of erythro-series pentoses and hexoses by N-chloro-p-toluenesulfonamide

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    The kinetics and mechanism of oxidation of D-glucose, D-mannose, D-fructose, D-arabinose, and D-ribose with chloramine-T in alkaline medium were studied. The rate law, rate = k Chloramine-T] Sugar] HO-](2), was observed. The rate of the reaction was influenced by a change in ionic strength of the medium, and the dielectric effect was found to be negative. The latter enabled the computation of d(AB), the size of the activated complex. The reaction rate was almost doubled in deuterium oxide. Activation energies were calculated from the Arrhenius plots. HPLC and GLC-MS analyses of the products indicated that the sugars were oxidized to a mixture of aldonic acids, consisting of arabinonic, ribonic, erythronic, and glyceric acids. Based on these data, a plausible mechanism involving the aldo-enolic anions of pentoses and keto-enolic anions of hexoses is suggested. (C) 1998 Elsevier Science Ltd. All rights reserved

    Some Thiosemicarbazide Complexes of Pt(II) & Pd(II)

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    985-98

    For reproductive justice in an era of Gates and Modi – the violence of India’s population policies

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    This article addresses India’s contemporary population control policies and practices as a form of gendered violence perpetrated by the state and transnational actors, arguing that the targeting of poor, Adivasi and Dalit women for coercive mass sterilizations and unsafe injectable and implantable contraceptives is made possible by the long-term construction of particular women’s lives as devalued and disposable, and of their bodies as excessively fertile and therefore inimical to development and progress. It further considers how population policy is currently embedded in the neoliberal framework of development being pursued by the Indian state. In particular, it argues that the violence of population policies is being deepened as a result of three central and interrelated aspects of this framework: corporate dispossession and displacement, the intensification and extension of women’s labour for global capital, and the discourses and embodied practices of Hindu supremacism. At the same time, India’s population policies cannot be understood in isolation from the global population control establishment, which is increasingly corporate led, and from broader structures of racialised global capital accumulation. The gendered violence of India’s contemporary population policies and the practices they produce operates at several different scales, all of which involve the construction of certain bodies as ‘unfit’ to reproduce and requiring intervention and control

    A whey protein-based multi-ingredient nutritional supplement stimulates gains in lean body mass and strength in healthy older men: A randomized controlled trial

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    Protein and other compounds can exert anabolic effects on skeletal muscle, particularly in conjunction with exercise. The objective of this study was to evaluate the efficacy of twice daily consumption of a protein-based, multi-ingredient nutritional supplement to increase strength and lean mass independent of, and in combination with, exercise in healthy older men. Forty-nine healthy older men (age: 73 ± 1 years [mean ± SEM]; BMI: 28.5 ± 1.5 kg/m2) were randomly allocated to 20 weeks of twice daily consumption of either a nutritional supplement (SUPP; n = 25; 30 g whey protein, 2.5 g creatine, 500 IU vitamin D, 400 mg calcium, and 1500 mg n-3 PUFA with 700 mg as eicosapentanoic acid and 445 mg as docosahexanoic acid); or a control (n = 24; CON; 22 g of maltodextrin). The study had two phases. Phase 1 was 6 weeks of SUPP or CON alone. Phase 2 was a 12 week continuation of the SUPP/CON but in combination with exercise: SUPP + EX or CON + EX. Isotonic strength (one repetition maximum [1RM]) and lean body mass (LBM) were the primary outcomes. In Phase 1 only the SUPP group gained strength (Σ1RM, SUPP: +14 ± 4 kg, CON: +3 ± 2 kg, P < 0.001) and lean mass (LBM, +1.2 ± 0.3 kg, CON: -0.1 ± 0.2 kg, P < 0.001). Although both groups gained strength during Phase 2, upon completion of the study upper body strength was greater in the SUPP group compared to the CON group (Σ upper body 1RM: 119 ± 4 vs. 109 ± 5 kg, P = 0.039). We conclude that twice daily consumption of a multi-ingredient nutritional supplement increased muscle strength and lean mass in older men. Increases in strength were enhanced further with exercise training
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