Results 21 to 30 of about 7,044,580 (389)

Passive mode-locking in semiconductor lasers with saturable absorbers bandgap shifted through quantum well intermixing [PDF]

open access: yes, 2014
Passive mode-locking in semiconductor lasers in a Fabry–Perot configuration with a bandgap blueshift applied to the saturable absorber (SA) section has been experimentally characterized.
Pusino, Vincenzo   +2 more
core   +1 more source

A path-independent integral and the approximate analysis of strain

open access: yes, 1968
: An integral is exhibited which has the same value for all paths surrounding a class of notches in two-dimensional deformation fields of linear or non-linear elastic materials.
J. Rice
semanticscholar   +1 more source

Biosynthesis of Polyketides in Streptomyces

open access: yesMicroorganisms, 2019
Polyketides are a large group of secondary metabolites that have notable variety in their structure and function. Polyketides exhibit a wide range of bioactivities such as antibacterial, antifungal, anticancer, antiviral, immune-suppressing, anti ...
Chandra Risdian   +2 more
doaj   +1 more source

Amycolatomycins A and B, Cyclic Hexapeptides Isolated from an Amycolatopsis sp. 195334CR

open access: yesAntibiotics, 2021
The rare actinobacterium Amycolatopsis sp. strain 195334CR was found to produce previously undescribed cyclic hexapeptides, which we named amycolatomycin A and B (1 and 2).
Gian Primahana   +5 more
doaj   +1 more source

Ultrashort Q-switched pulses from a passively mode-locked distributed Bragg reflector semiconductor laser [PDF]

open access: yes, 2012
A compact semiconductor mode-locked laser (MLL) is presented that demonstrates strong passive Q-switched mode-locking over a wide range of drive conditions.
Cheung   +12 more
core   +1 more source

Theoretical stress strain model for confined concrete

open access: yes, 1988
A stress‐strain model is developed for concrete subjected to uniaxial compressive loading and confined by transverse reinforcement. The concrete section may contain any general type of confining steel: either spiral or circular hoops; or rectangular ...
J. Mander, M. Priestley, R. Park
semanticscholar   +1 more source

Evaluation of 16S rRNA gene sequencing for species and strain-level microbiome analysis

open access: yesNature Communications, 2019
The 16S rRNA gene has been a mainstay of sequence-based bacterial analysis for decades. However, high-throughput sequencing of the full gene has only recently become a realistic prospect.
Jethro S. Johnson   +11 more
semanticscholar   +1 more source

Generic assignments, strain histories, and properties of pure cultures of cyanobacteria

open access: yes, 1979
Summary: On the basis of a comparative study of 178 strains of cyanobacteria, representative of this group of prokaryotes, revised definitions of many genera are proposed.
R. Rippka   +4 more
semanticscholar   +1 more source

The influence of the annealing mode on stress elimination in a foam glass structure [PDF]

open access: yesJournal of the Serbian Chemical Society, 2021
The purpose of this work was to establish the influence of features of the annealing mode on the value of residual stresses in the structure of porous inorganic materials using foam glass as an example.
Grushko Irina
doaj   +1 more source

Mechanically Strained Strained-Si NMOSFETs [PDF]

open access: yesIEEE Electron Device Letters, 2004
The drain-current enhancement of the mechanically strained strained-Si NMOSFET device is investigated for the first time. The improvements of the drain current are found to be /spl sim/3.4% and /spl sim/6.5% for the strained-Si and control Si devices, respectively, with the channel length of 25 /spl mu/m at the external biaxial tensile strain of 0.037%,
Maikap, S.   +4 more
openaire   +2 more sources

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