Results 21 to 30 of about 7,213 (266)

A SKELETON TELESCOPE [PDF]

open access: yesSchool Science and Mathematics, 1902
n ...
openaire   +1 more source

The Metagenomic Telescope

open access: yesPLoS ONE, 2014
Next generation sequencing technologies led to the discovery of numerous new microbe species in diverse environmental samples. Some of the new species contain genes never encountered before. Some of these genes encode proteins with novel functions, and some of these genes encode proteins that perform some well-known function in a novel way.
Szalkai, Balázs   +4 more
openaire   +4 more sources

Optics for Nano-Satellite X-Ray Monitor

open access: yesOpen Astronomy, 2015
The Schmidt lobster eye design for a grazing incidence X-ray optics provides a field of view of the order of many degrees, for this reason it can be a convenient approach for the construction of space X-ray monitors.
Tichý Vladimír   +3 more
doaj   +1 more source

Strain‐Release Pentafluorosulfanylation of Carbonyl‐Containing Disubstituted Bicyclobutanes: A Fortuitous Path to SF5‐Containing Oxa[2.1.1]bicyclohexanes

open access: yesAngewandte Chemie, EarlyView.
A regio‐ and diastereoselective method for strain‐release pentafluorosulfanylation of carbonyl‐containing 1,3‐disubstituted [1.1.0]bicyclobutanes (BCBs) was developed that led to several fortuitous discoveries. For instance, the resultant SF5‐cyclobutanes (SF5‐CBs) exhibit close SF5⋯C═X contacts (X = C, N, O) and provide synthetic access to a new class
Alexander M. Stephens   +9 more
wiley   +2 more sources

The Asiago Astrophysical Observatory and the Recently Refurbished 1.22 m Galileo telescope

open access: yesOpen Astronomy, 2012
A history of the 1.22 m Galileo telescope of the Asiago Astrophysical Observatory is described.
Rafanelli Piero, Siviero Alessandro
doaj   +1 more source

A profile of patients presenting at a low vision clinic in a resource-limited setting

open access: yesAfrican Vision and Eye Health, 2020
Background: The university-based low vision clinic is one of the few low vision clinics in South Africa. Aim: To describe demographic and clinical profiles of patients who attended this clinic from 2010 to 2017.
Zamadonda N.Q. Xulu-Kasaba   +6 more
doaj   +1 more source

N‐Alkoxysulfurdiimide Reagents for the One‐Step Modular Synthesis of Primary Sulfonimidamides

open access: yesAngewandte Chemie, EarlyView.
N‐Alkoxysulfurdiimide reagents when combined with organometallic reagents lead directly to primary sulfonimidamide products. The reactions are broad in scope, encompassing aryl, heteroaryl, and alkyl carbon substituents. The reactivity of the N‐alkoxysulfurdiimide reagents can be correlated with the electron‐withdrawing ability of the N‐substituent ...
Suzanne E. Davison   +6 more
wiley   +2 more sources

LUCI onboard Lagrange, the next generation of EUV space weather monitoring

open access: yesJournal of Space Weather and Space Climate, 2020
Lagrange eUv Coronal Imager (LUCI) is a solar imager in the Extreme UltraViolet (EUV) that is being developed as part of the Lagrange mission, a mission designed to be positioned at the L5 Lagrangian point to monitor space weather from its source on the ...
West Matthew J.   +9 more
doaj   +1 more source

Versatile Pneumatic Twisted Coiled Actuators Enabled by Fiber‐Polymer Composite Fabrication

open access: yesAdvanced Functional Materials, EarlyView.
This work reports composite Pneumatic Twisted Coiled Actuators with embedded Kevlar fibers that convert pneumatic or hydraulic pressure into powerful linear motion. A novel precise manufacturing technique is used to systematically explore how design variables influence actuator mechanics and dynamics.
William J. Townsend   +5 more
wiley   +1 more source

Sustainable Pd‐Catalyzed Aminations “on Dirty Water”

open access: yesAngewandte Chemie, EarlyView.
Aminations, done safely yet neat, and therefore, quickly, using low levels of Pd, in “dirty water” that must contain 30% KOH; not NaOH, and not at 5%,10%, 20%, 40%, or 50% KOH. Moreover, no base sensitivity of functional groups! Very cool. Thank you, Nature.
Erfan Oftadeh   +4 more
wiley   +2 more sources

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