Anti-Fibronectin polyclonal antibody

Background and objectives The falling number is a rapid method developed for assessing amylase level on flours, based on viscosity changes. This measurement records the time required for a stirring rod to travel through a flour paste. The Chopin Amylab FN, developed for assessing the FN, allows working as a rapid force analyzer (RFA), recording the force changes of a starch/flour slurry under controlled mixing/heating conditions. The objective of this research was to underline the starch changes occurring along 90 s under continuous mixing and heating. Findings Four different starches (corn, rice, wheat, and potato) were analyzed using the RFA, evaluating step-by-step the structural and textural modifications. Scanning electron micrographs revealed the progressive gelatinization process, that was specific for each type of starch. Nevertheless, the 90-s procedure was sufficient to ensure complete gelatinization of all starches. Parameters recorded from the RFA showed strong significant correlations with onset and peak gelatinization temperature, besides gelatinization enthalpy. Conclusions Rapid force analyzer could be used as a rapid method for starch pasting assessment, being valid for discriminating among different types of starches. Significance and novelty Study shows the potential of Amylab as RFA that records starches pasting performance in 90 s. A test of 90 s allows determining starch paste performance using a rapid force analyzer.

The Early Pleistocene sites of Barranco Leon and Fuente Nueva 3 (Guadix-Baza Basin, SE Spain) have yielded abundant Oldowan lithic artifacts and one hominin tooth (Homo sp. in level D1 or D2 of Barranco Leon), today considered to be among the earliest evidence for a hominin presence in Western Europe, at ca. 1.4-1.2 Ma. Here, for the first time, the stratigraphic succession of these two sites are studied more precisely from a palaeoenvironmental point of view, taking into account the different levels of the depositional sequences to analyze the successive fossil assemblages of amphibians and reptiles. Palaeoenvironmental reconstructions are carried out by applying the "habitat weighting" method, which uses the modern distribution by habitat of amphibian and reptile species in order to interpret past landscapes. The successive herpetofaunal assemblages from Barranco Leon show a certain tendency towards more arid conditions from level D1 to level E, whereas in Fuente Nueva 3 environmental reconstructions reveal oscillating conditions, with a tendency towards more arid conditions in the basal part of the sequence, up to level 5, where the tendency shifts back to more humid conditions. Our results show that the layers included in this study with the highest density of anthropic evidence (such as level 5 in FN 3 and levels D1 and D2 in BL) are situated within the late Early Pleistocene climatic and environmental cyclicity, yielding different environmental conditions: a humid, wooded biotope for BL, and a more open and drier biotope in FN 3. This suggests that the hominins of the late Early Pleistocene, although conditioned to some extent by climatic factors, were able to cope with changing environmental conditions, both "interglacial" and "glacial", in the southwestern extremity of the European continent. (C) 2020 Elsevier Ltd. All rights reserved.