The closed-edge structure of graphite and the effect of electrostatic charging

The properties of graphite, and of few-layer graphene, can be strongly influenced by the edge structure of the graphene planes, but there is still much that we do not understand about the geometry and stability of these edges. We present an experimental and theoretical study of the closed edges of graphite crystals, and of the effect of an electric field on their structure. High-resolution transmission electron microscopy is used to image the edge structure of fresh graphite and of graphite that has been exposed to an electric field, which experiences a separation of the graphene layers. Computer simulations based on density functional theory are used to rationalise and quantify the preference for the formation of multiple concentric loops at the edges. A model is also presented to explain how the application of an electric field leads to the separation of the folded edges

Forced migration and indigenous knowledge of displaced Emberá and Uitoto populations in Colombia:an ethnobotanical perspective

Relatively little attention has been given to documenting changes in the ethnobotanical knowl-edge of displaced indigenous groups in Colombia. Such information is highly valuable becauseit contributes to our understanding of the changes that occur during this process of displace-ment, cultural transformation and loss, and because it eventually could shed some light indesigning social, economic, and educational policies that would facilitate their incorporationinto mainstream culture, through ways that validate their indigenous identity, knowledge, andtraditions. Based on our on-going research, herein we summarize ethnobotanical informationof two indigenous groups currently residing in the city of Florencia (capital of the Departmentof Caquetá) in the Northwestern Amazon basin: the Emberá, originally from northwesternColombia, and Uitoto, originally from the Colombian Amazon. By focusing in the indigenousethnobotanical knowledge of these two displaced groups, we intend to show the revitalizationof ethnobotanical knowledge, resilience, and multiple resources in form of ancestral knowl-edge that are brought and transmitted by these groups as they struggle for survival, in manytimes hostile urban environments. We hope to draw more attention to and encourage similarstudies on other displaced indigenous populations in Colombia as well as in other areas of LatinAmeric

Plantas útiles en una comunidad indígena Murui-Muinane desplazada a la ciudad de Florencia (Caquetá Colombia)

Ethnobotanical studies on the displaced indigenous groups of Colombia are scarce. This research report provides a list of 54 plant species (50 genera in 32 families) used by a displaced group of Murui-Muinane (= Witoto, Uitoto, Huitoto) that lives in the city of Florencia, capital of the Department of Caqueta. Only six (11%) plant species are not native to the Americas. Arecaceae and Fabaceae were the families with the highest number of species: eight and six respectively. The three categories of use with the highest number of species were: food (27 spp.), medicinal (15) and handicrafts (15). These 54 plant species used by the Murui in Florencia correspond to 19% of the total number of plants recorded as used by a Murui community that lives in a forested reservation in the Department of Putumayo. Such difference in the number of useful plants is noteworthy given that Colombian indigenous cultures are rapidly transforming and their ethnobotanical knowledge might be lost forever

Seeds used in handicraft manufactured by an Embera-Katio indigenous population displaced by violence in Colombia

The sale of handicrafts embellished with seeds is an important source of income for a displaced indigenous Emberá-Katío group that lives in the city of Florencia (Departamento of Caquetá, Colombia). We provide a list of the 34 plant species (23 genera in 10 families) used in handicrafts, as well as information on where and how the are obtained. Seeds of native legumes (family Fabaceae) are the main material used. Most manufactured items have seeds of Ormosia nobilis (Fabaceae), Canna edulis (Cannaceae), and Sapindus saponaria (Sapindaceae). About half of the plant species used by the Emberá-Katío are perennial trees. Except for the seeds of Coix lacryma-jobi (Poaceae) and Ormosia sp., which are obtained from other local indigenous groups such as the Koreguajes and Uitotos, all seeds are collected from small patches of secondary forest near or within the city. Because most plants used are native and widely distributed in the Neotropical region, we suggest that, despite cultural transformation, at least some cultural knowledge about native plants is still maintained, and we speculate that other Emberá groups might use the same or similar plant species. We also provide the Spanish and Emberá names of the plants used in the handicrafts

Communications Biophysics

Contains reports on seven research projects split into three sections, with research objective for the final section.National Institutes of Health (Grant 2 PO1 NS 13126)National Institutes of Health (Grant 5 RO1 NS 18682)National Institutes of Health (Grant 1 RO1 NS 20322)National Institutes of Health (Grant 1 RO1 NS 20269)National Institutes of Health (Grant 5 T32 NS 07047)Symbion, Inc.National Institutes of Health (Grant 5 RO1 NS10916)National Institutes of Health (Grant 1 RO1 NS16917)National Science Foundation (Grant BNS83-19874)National Science Foundation (Grant BNS83-19887)National Institutes of Health (Grant 5 RO1 NS12846)National Institutes of Health (Grant 5 RO1 NS21322)National Institutes of Health (Grant 5 RO1 NS 11080

Summary for policymakers

The Working Group III contribution to the IPCC Fifth Assessment Report (WGIII AR5) provides a comprehensive assessment of all relevant options for mitigating climate change through limiting or preventing greenhouse gas emissions, as well as activities that remove them from the atmosphere. It draws on scientific literature accepted for publication prior to 4 October 2013. The WGIII Summary for Policymakers was approved at the Twelfth Session of Working Group III, held in Berlin, Germany, from 7 to 11 April, 2014. During the session, the IPCC plenary also accepted the underlying scientific and technical assessment, which stands at 2000 pages, including more than 700 pages of references

Communications Biophysics

Contains reports on eight research projects split into four sections.National Institutes of Health (Grant 5 P01 NS13126)National Institutes of Health (Grant 5 K04 NS00113)National Institutes of Health (Training Grant 5 T32 NS07047)National Science Foundation (Grant BNS80-06369)National Institutes of Health (Grant 5 ROl NS11153)National Institutes of Health (Fellowship 1 F32 NS06544)National Science Foundation (Grant BNS77-16861)National Institutes of Health (Grant 5 R01 NS10916)National Institutes of Health (Grant 5 RO1 NS12846)National Science Foundation (Grant BNS77-21751)National Institutes of Health (Grant 1 R01 NS14092)National Institutes of Health (Grant 2 R01 NS11680)National Institutes of Health (Grant 5 ROl1 NS11080)National Institutes of Health (Training Grant 5 T32 GM07301

Communications Biophysics

Contains reports on seven research projects split into three sections.National Institutes of Health (Grant 5 PO1 NS13126)National Institutes of Health (Grant 1 RO1 NS18682)National Institutes of Health (Training Grant 5 T32 NS07047)National Science Foundation (Grant BNS77-16861)National Institutes of Health (Grant 1 F33 NS07202-01)National Institutes of Health (Grant 5 RO1 NS10916)National Institutes of Health (Grant 5 RO1 NS12846)National Institutes of Health (Grant 1 RO1 NS16917)National Institutes of Health (Grant 1 RO1 NS14092-05)National Science Foundation (Grant BNS 77 21751)National Institutes of Health (Grant 5 R01 NS11080)National Institutes of Health (Grant GM-21189

Communications Biophysics

Contains research objectives and reports on eight research projects split into three sections.National Institutes of Health (Grant 2 PO1 NS13126)National Institutes of Health (Grant 5 RO1 NS18682)National Institutes of Health (Grant 5 RO1 NS20322)National Institutes of Health (Grant 1 RO1 NS 20269)National Institutes of Health (Grant 5 T32 NS 07047)Symbion, Inc.National Institutes of Health (Grant 5 R01 NS10916)National Institutes of Health (Grant 1 RO NS 16917)National Science Foundation (Grant BNS83-19874)National Science Foundation (Grant BNS83-19887)National Institutes of Health (Grant 5 RO1 NS12846)National Institutes of Health (Grant 1 RO1 NS21322-01)National Institutes of Health (Grant 5 T32-NS07099-07)National Institutes of Health (Grant 1 RO1 NS14092-06)National Science Foundation (Grant BNS77-21751)National Institutes of Health (Grant 5 RO1 NS11080

Technical summary

The Working Group III (WGIII) contribution to the IPCC's Fifth Assessment Report (AR5) assesses literature on the scientific, technological, environmental, economic and social aspects of mitigation of climate change. It builds upon the WGIII contribution to the IPCC's Fourth Assessment Report (AR4), the Special Report on Renewable Energy Sources and Climate Change Mitigation (SRREN) and previous reports and incorporates subsequent new findings and research. Throughout, the focus is on the implications of its findings for policy, without being prescriptive about the particular policies that governments and other important participants in the policy process should adopt. In light of the IPCC's mandate, authors in WGIII were guided by several principles when assembling this assessment: (1) to be explicit about mitigation options, (2) to be explicit about their costs and about their risks and opportunities vis-a-vis other development priorities, (3) and to be explicit about the underlying criteria, concepts, and methods for evaluating alternative policies. This summary offers the main findings of the report