Results 61 to 70 of about 4,721 (161)

Monitoring the Employment Contract in Alaska [PDF]

open access: yes, 1989
Detta arbete handlar om bakomliggande faktorer för framgångsrik kompetensutveckling av lärare inom naturvetenskap. Det är en litteraturstudie av tidigare forskning inom området.
Rutledge, Joyce S.
core   +1 more source

Electrocatalytic properties of Ni hydroxides with Zn or Co in the Ni matrix [PDF]

open access: yes, 2014
The majority of the work in this thesis has been made with the improvement of the systems for electrochemical co-generation of chemicals and electricity in mind. This is an appealing but challenging way of producing chemicals with energy as a bi-product,
Göransson, Gert
core   +1 more source

Wide‐Bandgap Perovskite‐Inspired Materials: Defect‐Driven Challenges for High‐Performance Optoelectronics

open access: yesAdvanced Functional Materials, Volume 34, Issue 50, December 9, 2024.
Wide‐bandgap and air‐stable perovskite‐inspired materials (PIMs) are low‐toxicity alternatives to lead‐halide perovskites (LHPs). However, the optoelectronic performance of PIMs is far inferior to that of the LHPs, particularly due to a high defect density.
G. Krishnamurthy Grandhi   +9 more
wiley   +1 more source

Trender och likvärdighet - Svenska elevers resultat på PISA naturvetenskap i en internationell jämförelse

open access: yesUtbildning & Demokrati, 2013
Sweden experiences an evident downward trend regarding Swedish students’ performances on large-scale science tests during the last 15 years. This article aims to analyze this trend using percentiles, analyze the trend of in-between school variance but ...
Eva Davidsson   +2 more
doaj   +1 more source

Learning Study och kollegial CoRe stimulerar lärares professionella utveckling inom naturvetenskaplig undervisning

open access: yesLUMAT, 2020
Syftet med studien är att klargöra hur lärares professionella utveckling stimuleras då de planerar och genomför en Learning Study (LS) kombinerad med verktyget Content Representation (CoRe). Data består av sex erfarna lärares inspelade diskussioner under
Niclas Åhman   +2 more
doaj   +1 more source

Self‐Nanoformulating Poly(2‐oxazoline) and Poly(2‐oxazine) Copolymers Based Amorphous Solid Dispersions as Microneedle Patch: A Formulation Study

open access: yesAdvanced Materials Technologies, Volume 9, Issue 23, December 2, 2024.
This study presents a new method in transdermal drug delivery using microneedles made from a drug and a block copolymer, achieving a minimalist formulation with high drug loading (40 wt%). The microneedles maintain structural integrity and effectiveness in skin penetration and introduce an innovative “nano‐in‐micro drug delivery system” for improved ...
Carmine D'Amico   +5 more
wiley   +1 more source

Protein Cage Directed Assembly of Binary Nanoparticle Superlattices

open access: yesAdvanced Science, Volume 11, Issue 45, December 4, 2024.
Co‐crystallization of two different protein cages characterized by opposing surface charges and unequal diameter is shown. Encapsulating metal nanoparticles inside the cages and precise tuning of the electrostatic attraction between the cages enables the preparation of binary crystals with dimensions up to several tens of micrometers.
Yu Zhou   +5 more
wiley   +1 more source

In Situ TEM Imaging Reveals the Dynamic Interplay Between Attraction, Repulsion and Sequential Attraction‐Repulsion in Gold Nanoparticles

open access: yesSmall, Volume 20, Issue 51, December 19, 2024.
The effect of electron beam dose rate, nanoparticle size, and interparticle distance on the in situ nanoscale dynamics of gold nanoparticles are investigated. The results revealed that two other dynamic processes, repulsion, and sequential attraction‐repulsion are also as favorable as that of routinely observed coalescence between two gold ...
Abid Zulfiqar   +3 more
wiley   +1 more source

Samtliga bokrecensioner

open access: yesLychnos, 2018
Staffan Bergwik: Kunskapens osynliga scener. Vetenskapshistorier 1900-1950 (Aant Elzinga) Carl-Göran Heidegren: Positivismstrider (Martin Wiklund) Victoria Fareld & Hans Ruin (red.): Historiens hemvist. 1.
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doaj  

Enhanced Nonlinear Optical Responses in MoS2 via Femtosecond Laser‐Induced Defect‐Engineering

open access: yesAdvanced Functional Materials, Volume 34, Issue 46, November 12, 2024.
In this study, optical modification is used to create elevated structures with enhanced second and third harmonic generation on mono‐ and trilayer molybdenum disulfide (MoS2) in an inert environment. The enhancement is attributed to optically induced defect states within the bandgap of MoS2, which creates optimal conditions for double resonant harmonic
Suvi‐Tuuli M. Akkanen   +9 more
wiley   +1 more source

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