Results 101 to 110 of about 21,525 (306)
Synthesis of a Novel Amine‐Based Curing Agent for Epoxy Resins Derived From Vanillin
Journal of Applied Polymer Science, EarlyView.The four‐step synthesis of a new bio‐based amine hardener is described starting from vanillin as a bio‐based compound. The hardener ADBA was utilized to cure DGEBA and the resulting Tg,tanδmax was determined via DMA. Compared to other bio‐based curing agents, our curing agent is obtainable in a high yield and leads to a superior Tg of 135°C.
Bastian Hahn +3 more
wiley +1 more source
Age of the Spokane glaciation [PDF]
, 1924 In this article, Bretz describes two glaciers that reached then drained through the northern part of the Columbia basalt plateau. Based on the physical evidence, Bretz attempts to determine when the earlier Spokane glaciation occurred relative to the ...
Bretz, J Harlen
core +1 more source
Diatom boron isotope data from ODP Site 882 over the intensification of Northern Hemisphere Glaciation [PDF]
Diatom boron and boron isotope data from ODP Site 882 in the subarctic Pacific Ocean over the intensification of Northern Hemisphere glaciation (iNHG) at 2.73 ...
Rae, James W B +3 more
core +1 more source
Carnets de Géologie, 2005 The Hirnantian is an important time in Earth history as it includes one of the major episodes of continental glaciation and marine mass extinction (e.g. Brenchley et alii, 1994).
Grassineau Nathalie +4 more
doaj
The Anatomical Record, EarlyView.Abstract Invasive gray squirrels (Sciurus carolinensis) have replaced the native red squirrel (Sciurus vulgaris) across much of Great Britain over the last century. Several factors have been proposed to underlie this replacement, but here we investigated the potential for dietary competition in which gray squirrels have better feeding performance than ...
Philip G. Cox, Peter J. Watson
wiley +1 more source
Present-day changes of mountain glaciers on the southern slope of the Dzhungarian Alatau range
Лëд и снег, 2015 Glacierization of southern slope of the Dzhungarian (Zhetysu) Alatau range was estimated by means of data obtained by operational satellite Landsat 7 surveys on August 19 and September 2011 (sensors ETM+) with the use of digital relief models (ASTER GDEM)
A. L. Kokarev, I. N. Shesterova
doaj +1 more source
The Anatomical Record, EarlyView.Abstract The Pleistocene is a key period for understanding the evolutionary history and palaeobiogeography of the European rabbit (Oryctolagus cuniculus). The species was first documented in southeastern Iberia at the beginning of the Middle Pleistocene and appears to have rapidly spread throughout Southwestern Europe, where it was found in numerous ...
Maxime Pelletier
wiley +1 more source
Polar Research, 2014 We report on 10Be and optically stimulated luminescence ages from moraines and glaciolacustrine sediments on eastern Jameson Land, East Greenland. Sampled landforms and sediment are associated with advances of outlet glaciers from the local Liverpool ...
Helena Alexanderson, Lena Håkansson
doaj +1 more source
Glaciation of Siberia and the problem of massive ice beddings
Лëд и снег, 2017 As a result of many years of the author’s studies of glaciers and ground ices, a great amount of factual material has been collected for a purpose to analyze a possibility of burying the glaciers in the permafrost zone and to esti‑ mate a time of their ...
V. S. Sheinkman
doaj +1 more source
The Anatomical Record, EarlyView.Abstract Neandertals are known to possess very distinctive traits in their bony labyrinth morphology, such as an inferiorly positioned posterior canal and a very low number of turns in the cochlea. Hence, the inner ear has been often used to assess the Neandertal status of fragmentary fossils.
Alessandro Urciuoli +6 more
wiley +1 more source