3 research outputs found
Comment on "Stellar activity masquerading as planets in the habitable zone of the M dwarf Gliese 581"
This document is the Accepted Manuscript Version of the following article: Guillem Anglada-Escude and Mikko Tuomi, 'Comment on "Stellar activity masquerading as planets in the habitable zone of the M dwarf Gliese 581"', Science, Vol 347 (6226), 2015, the final, published version is available online at doi: 10.1126/science.1260796. © 2015 The American Association for the Advancement of Science. All rights reserved.Robertson et al. (Reports, 25 July 2014, p. 440) claimed that activity-induced variability is responsible for the Doppler signal of the proposed planet candidate GJ 581d. We point out that their analysis using periodograms of residual data is inappropriate and promotes inadequate tools. Because the claim challenges the viability of the method to detect exo-Earths, we encourage reanalysis and a deliberation on what the field-standard methods should be.Peer reviewedFinal Accepted Versio
MOESM3 of Effective isopropanol–butanol (IB) fermentation with high butanol content using a newly isolated Clostridium sp. A1424
Additional file 3: Table S1. Net NADH balance per one mole of product formation from the corresponding mole of glucose and glycerol
Morphology Control of Surfactant-Assisted Graphene Oxide Films at the Liquid–Gas Interface
Control
of a two-dimensional (2D) structure of assembled graphene
oxide (GO) sheets is highly desirable for fundamental research and
potential applications of graphene devices. We show that an alkylamine
surfactant, i.e., octadecylamine (ODA), Langmuir monolayer can be
utilized as a template for adsorbing highly hydrophilic GO sheets
in an aqueous subphase at the liquid–gas interface. The densely
packed 2-D monolayer of such complex films was obtained on arbitrary
substrates by applying Langmuir–Schaefer or Langmuir–Blodgett
technique. Morphology control of GO sheets was also achieved upon
compression by tuning the amount of spread ODA molecules. We found
that ODA surfactant monolayers prevent GO sheets from sliding, resulting
in formation of wrinkling rather than overlapping at the liquid–gas
interface during the compression. The morphology structures did not
change after a graphitization procedure of chemical hydrazine reduction
and thermal annealing treatments. Since morphologies of graphene films
are closely correlated to the performance of graphene-based materials,
the technique employed in this study can provide a route for applications
requiring wrinkled graphenes, ranging from nanoelectronic devices
to energy storage materials, such as supercapacitors and fuel cell
electrodes