Results 71 to 80 of about 5,540 (174)

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

Folding of mRNA‐DNA Origami for Controlled Translation and Viral Vector Packaging

open access: yesAdvanced Materials, Volume 37, Issue 15, April 16, 2025.
The packaging of mRNA into a compact, predefined shape can impact cellular delivery. This study presents a first set of design rules for the efficient folding of mRNA‐DNA origami structures, while preserving its initial translation functionality, which is demonstrated extracellularly as well as in vitro by using virus capsid proteins for packaging and ...
Iris Seitz   +8 more
wiley   +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

Redox‐Active Bisphosphonate‐Based Viologens as Negolytes for Aqueous Organic Flow Batteries

open access: yesChemistry – A European Journal, Volume 31, Issue 16, March 17, 2025.
Bisphosphonate‐substituted viologens (BBPE‐Vi and MBPE‐Vi) exhibit high solubility (1.45 M) and stability (0.009% capacity decay per cycle), making them effective for AOFBs. The bulky, negatively charged bisphosphonate groups reduce degradation through bimolecular side reactions, while their electron‐rich character in the deprotonated state effectively
Gabriel Gonzalez   +8 more
wiley   +1 more source

Samverkan mellan skola och lantbruk [PDF]

open access: yes, 2010
Syftet med denna litteraturstudie var att undersöka vilka erfarenheter av samver-kan mellan lantbruk och skolor som i första hand finns vetenskapligt publicerade. Hur har samarbetet bedrivits och vad blev resultatet?
Lundström, Christina
core  

Perovskite‐Inspired Cs₂AgBi₂I₉: A Promising Photovoltaic Absorber for Diverse Indoor Environments

open access: yesAdvanced Energy Materials, Volume 15, Issue 7, February 18, 2025.
This study have developed polycrystalline Cs₂AgBi₂I₉, a promising material for indoor photovoltaics (IPVs). Cs₂AgBi₂I₉ films have intriguing properties, such as weak electron‐phonon coupling and low exciton binding energy, which are advantageous for photovoltaic applications. Cs₂AgBi₂I₉ devices have demonstrated ≈8% efficiency at 1000 lux. They perform
Mokurala Krishnaiah   +14 more
wiley   +1 more source

Soft Micropneumatic Touchpad

open access: yesAdvanced Intelligent Systems, Volume 7, Issue 2, February 2025.
Sensors outputting fluidic signals would allow replacing electrical or optical sensors in soft devices with their fluidic alternatives. This work reports a soft elastomeric touchpad consisting of 32 pneumatic microchannels. When touched, the cross‐sectional area and flow resistance of the channels near the contact location change, allowing the touchpad
Vilma Lampinen   +3 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

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

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