323 research outputs found

    Nutritional composition and consumer acceptability study of different preparations of edamame soy beans.

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    Masters Degree. University of KwaZulu-Natal, Pietermaritzburg.The aim of this study was to determine the nutritional composition and physical properties of dry mature and roasted mature Edamame beans and to compare, through sensory evaluation, the consumer accessibility of these products in grade 5 learners. Soy beans have been known and recognised for centuries as a plant food that, when compared with other plants, is high in protein. For this reason, soy beans have historically been called ‘meat of the field’. The overall energy content of the Edamame soy beans remained unchanged after undergoing oven and microwave roasting. Even though the microwave roasted soy bean samples appeared to have a higher macronutrient content when compared to oven roasted soy bean samples, it is important to recognize the fact that microwave roasting causes more water loss, which has a concentrating effect on the macronutrients. Forty-one grade 5 learners participated in a sensory evaluation, conducted at Cato Crest Primary School in Durban, KwaZulu-Natal. In this study, learners preferred the Edamame above their usual sweet-flavoured snacks. The learners however, preferred samples that had strong "sweet" and monosodium glutamate flavours. Results from this study suggest that the different roasting methods of Edamame beans do not yield products that are significantly different in terms of nutritional quality. Yet, microwave roasting caused more fluid loss. This makes microwave roasting ideal to process Edamame soy beans due to improved shelf life. Edamame soy beans are a healthier source of protein in comparison to peanuts as it provides good quality protein with a lower fat content. It provides all of the essential amino acids for adults and children and would be a good alternative source of protein if made more available to those at risk of malnutrition

    Elizabeth to Jim, 17 November 1961

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    Theory of ultrafast quasiparticle dynamics in high-temperature superconductors: Pump fluence dependence

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    We present a theory for the time-resolved optical spectroscopy of high-temperature superconductors at high excitation densities with strongly anisotropic electron-phonon coupling. A signature of the strong coupling between the out-of-plane, out-of-phase O buckling mode (B1gB_{1g}) and electronic states near the antinode is observed as a higher-energy peak in the time-resolved optical conductivity and Raman spectra, while no evidence of the strong coupling between the in-plane Cu-O breathing mode and nodal electronic states is observed. More interestingly, it is observed that under appropriate conditions of pump fluence, this signature exhibits a re-entrant behavior with time delay, following the fate of the superconducting condensate.Comment: 5 pages, 3 embedded eps figures, to appear in PR

    Photoexcited electron dynamics in Kondo insulators and heavy fermions

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    We have studied the photoexcited carrier relaxation dynamics in the Kondo insulator SmB6 and the heavy fermion metal YbAgCu4 as a function of temperature and excitation level. The dynamic response is found to be both strongly temperature dependent and nonlinear. The data are analyzed with a Rothwarf-Taylor bottleneck model, where the dynamics are governed by the presence of a narrow gap in the density of states near the Fermi level. The remarkable agreement with the model suggests that carrier relaxation in a broad class of heavy electron systems (both metals and insulators) is governed by the presence of a (weakly temperature dependent) hybridization gap.Comment: accepted for publication in Physical Review Letter
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