Results 111 to 120 of about 139,043 (287)

Synthesis of Mixed Carbonates via a Three-Component Coupling of Alcohols, CO2, and Alkyl Halides in the Presence of K2CO3 and Tetrabutylammonium Iodide

open access: yesMolecules, 2002
Various mixed carbonates can be conveniently prepared in good yields using the corresponding alcohols, alkyl halides under CO2 atmosphere in the presence of potassium carbonate or sodium carbonate and tetrabutylammonium iodide.
Yu-Mei Shen, Min Shi
doaj   +1 more source

High‐Sublimation‐Temperature Additives for Efficient Perovskite Solar Cells via Single‐Source Evaporation

open access: yesAdvanced Energy Materials, EarlyView.
The introduction of high‐sublimation‐temperature additives during the mechanosynthesis of FAPbI3 powders enables the single‐source evaporation of phase‐pure, additive‐free FAPbI3 thin films of high optoelectronic quality. The additive‐engineered deposition process yields photovoltaic devices with stabilized efficiencies exceeding 18% for an active ...
Zongbao Zhang   +13 more
wiley   +1 more source

Plant Biomarker Pattern, Screening Programme for Phytochemical Differences in Plants Exposed to Stress [PDF]

open access: yes, 2002
A screening programme is developed to investigate phytochemical differences in plants xposed to stress compared with non-exposed plants. The screening programme, in its resent form or in a more simplified form, can be utilized in several different areas ...
Adsersen, Anne   +4 more
core  

High‐Performance Noble‐Metal‐Free Perovskite Solar Cells Enabled by MoOX/Cr/Al Multilayer Electrodes

open access: yesAdvanced Energy Materials, EarlyView.
Cost‐effective perovskite solar cells (PSCs) are developed using a noble‐metal‐free MoOX/Cr/Al multilayer electrode. The devices achieve a power conversion efficiency (PCE) of 25.6%, competitive with that of Au‐based devices (26.3%), and a 25.5 cm2 mini‐module shows 21.3% PCE.
Wooyeon Kim   +7 more
wiley   +1 more source

Organic Photoelectrochemical Cells Beyond Performance: Interface and Catalyst Engineering for Durability

open access: yesAdvanced Energy Materials, EarlyView.
Organic photoelectrochemical cells based on π‐conjugated semiconductors offer a versatile platform for solar fuel generation. This review outlines operating principles, device architectures, and key metrics, and highlights advances in p‐ and n‐type photoelectrodes, interfacial engineering, and catalyst integration.
Jaehyeong Kim   +8 more
wiley   +1 more source

Iodine prophylaxis in pregnant women: a comparativeanalysis of different methods efficacy in conditions of goiter endemia

open access: yesТерапевтический архив, 2003
Aim. To assess efficacy of different methods of iodine prophylaxis in pregnant women living in conditions of goiter endemia. Material and methods. Standard clinical, laboratory and device tests for iodine deficiency according to WHO criteria were made in
Е F Turovinina   +3 more
doaj  

Conidiobolomycosis: apparent yet overlooked. A report of two cases

open access: yesBMC Infectious Diseases
Background Conidiobolomycosis is a rare, chronic subcutaneous fungal infection caused primarily by Conidiobolus coronatus and Conidiobolus incongruus. It predominantly affects immunocompetent individuals and presents as slowly progressive rhino-facial ...
Kulasinghe Arachchige Chethana Charitha Pemasiri   +4 more
doaj   +1 more source

Electrochemical processes and systems: application for tutors [PDF]

open access: yes, 1997
The features of redox reactions and the principles of their balancing according to the medium composition are considered. The basic representations about electrochemical processes and systems are outlined. The reactions and principles of chemical sources
Beccard, R.   +5 more
core  

Basidiobolus: An unusual cause of lung abscess

open access: yesLung India, 2010
Non-resolving pneumonia leading to lung abscess is always a challenge to the treating physician especially in a diabetic patient. Atypical radiological features of lung abscess should raise the suspicion of unusual organisms.
Chetambath Ravindran   +6 more
doaj  

Use of a distant reporter group as evidence for a conformational change in a sensory receptor [PDF]

open access: yes, 1977
A highly sensitive method for demonstrating ligand-induced conformational changes in protein molecules in solution is described. The method utilizes an environmentally sensitive reporter group that is known to be distant from the active site.
Hartig, P. R.   +2 more
core  

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