Wheat grain cooking process as investigated by modulated temperature differential scanning calorimetry

The thermal properties of soft and hard wheat grains, cooked in a steam pressure cooker, as a function of cooking temperature and time were investigated by modulated temperature differential scanning calorimetry (MTDSC). Four cooking temperatures (110, 120, 130 and 140 degrees C) and six cooking times (20, 40, 60, 80, 100 and 120 min) for each temperature were studied. It was found that typical non-reversible heat flow thermograms of cooked and uncooked wheat grains consisted of two endothermic baseline shifts localised around 40-50 degrees C and then 60-70 degrees C. The second peaks of non-reversible heat flow thermograms (60-70 degrees C) were associated with starch gelatinisation. The degree of gelatinisation was quantified based on these peaks. In this study, starch was completely gelatinised within 60-80 min for cooking temperatures at 110-120 degrees C and within 20 min for cooking temperatures at 130-140 degrees C. MTDSC detected reversible endothermic baseline shifts in most samples, localised broadly around 48-67 degrees C with changes in heat capacity ranging from 0.02 to 0.06 J/g per degrees C. These reversible endothermic baseline shifts are related to the glass transition, which occurs during starch gelatinisation. Data on the specific heat capacity of the cooked wheat samples are provided. (C) 2005 Elsevier Ltd. All rights reserved.

The most influential books in Australian sociology (MIBAS), 1963-2003

To mark the 40th anniversary of the Australian Sociological Association (TASA), a survey on the Most Influential Books in Australian Sociology (MIBAS) was conducted. In this article we discuss the MIBAS process, its findings, and provide some reflections on the top 10 most influential books. We also situate the MIBAS survey among other attempts to compile lists of the most influential books in the discipline of sociology, and discuss the benefits and limits of such endeavours. We argue that the MIBAS exercise was useful not only as a commemorative device, but as an opportunity to reflect on the breadth and influence of Australian sociological scholarship.