Results 161 to 170 of about 6,262,155 (317)

Donor‐Substituted C(sp3)‐Bridged Phosphorus‐Heterotriangulenes as Blue Thermally Activated Delayed Fluorescence Emitters

open access: yesAdvanced Optical Materials, EarlyView.
The newly developed regioselective strategy for the para‐functionalization of C(sp3)‐bridged phosphorus‐centered heterotriangulene delivers a series of donor‐acceptor emitters exhibiting thermally activated delayed fluorescence. The carbazole‐substituted compounds feature a unique combination of high photoluminescence quantum yields up to 75%, deep ...
Maximilian Schöner   +8 more
wiley   +1 more source

A qualitative content analysis exploring gender representation in language textbooks published by Jammu and Kashmir board of school education

open access: yesSocial Sciences and Humanities Open
This paper examines gender representation in Jammu and Kashmir Board of School Education (JKBOSE) language textbooks. These books were revised and developed as per the guidelines of National Curriculum Framework (NCF), 2005, which emphasizes on the ...
Shabir Ahmad Para
doaj   +1 more source

Well-being, work comfort and food security are better than maximizing production in the Amazon [PDF]

open access: yes, 2008
In the Amazon, slash and burn is the most common technique used by American-Indians, small farmers and even big ranches to transform forests into rural landscapes.
Barbosa, T.M.F.   +7 more
core  

Effect of Host Anisotropy on Phosphorescent Emitter Orientation and Light Outcoupling in OLEDs

open access: yesAdvanced Optical Materials, EarlyView.
The orientation of the emissive transition dipole moment of a cage‐type Iridium complex can be tuned by the anisotropic alignment of the cohost material, which is expressed as the S$S$ parameter of the film. Thus, the external quantum efficiency of OLEDs can be further enhanced to reach values above 30%.
Bình‐Minh Nguyễn   +5 more
wiley   +1 more source

Cultura da mandioca: apostila. [PDF]

open access: yes, 2014
Agricultura Na Amazônia: Desafios Ambientais, Econômicos, Sociais E Políticos; Manejo E Conservação Do Solo; Melhoramento Genético Da Mandioca Para O Estado Do Pará; Produção De Mandioca Em Roça Sem Fogo E Trio Da Produtividade; Calagem E Adubação Para A
ALVES, R. N. B.   +1 more
core  

Parâmetros genéticos para dias ao parto, data do parto e sucesso ao parto em rebanhos experimentais da raça Nelore

open access: yesBoletim de Indústria Animal, 2013
Dados de três rebanhos experimentais de bovinos Nelore foram analisados para estimar parâmetros genéticos de três características de fertilidade de matrizes: dias ao parto (DIAP), data do parto (DATAP) e sucesso ao parto (SP). Os 7.951 registros de 1.575 vacas foram obtidos de 1978 a 2000 e até 12 registros estavam disponíveis por animal.
Maria Eugênia Zerlotti Mercadante   +3 more
openaire   +7 more sources

Chiral Potassium Brønsted Base‐Catalyzed Stereoselective Synthesis of 1,3‐Diols via a Tandem Allylic Isomerization/Asymmetric Aldol–Tishchenko Reaction

open access: yesAdvanced Synthesis &Catalysis, EarlyView.
Chiral potassium base catalysts featuring 1,1´‐bi‐2‐naphthol‐derived chiral crown ethers as ligands promote a tandem allylic isomerization/asymmetric aldol‐Tishchenko reaction of allylic alcohols and aldehydes. This method provides enantioenriched 1,3‐diols with excellent diastereoselectivity and high enantioselectivity, thereby expanding the synthetic
Hiroki Ishikawa, Masahiro Sai
wiley   +1 more source

Harnessing Carbenoid Reactivity From Imidazoles and Oxiranes

open access: yesAdvanced Synthesis &Catalysis, EarlyView.
The combination of azole compounds and oxiranes exhibits carbenoid reactivity at elevated temperatures, as demonstrated by the successful benzoin condensation of aromatic aldehydes. Using this catalytic system to polymerize bifunctional aldehyde/oxirane monomers yields thermosets with glass transition temperatures above 100°C.
Matthias R. Steiner   +4 more
wiley   +1 more source

O desenvolvimento rural no contexto da BR-230 (Transamazônica) e do PDRS Xingú. [PDF]

open access: yes, 2014
Este trabalho é parte das contribuições apresentadas pela Embrapa Amazônia Oriental como uma das instituições envolvidas no Grupo de Trabalho interinstitucional constituído pela Secretaria Estadual de Integração Regional – SEIR para subsidiar a ...
SILVA, L. G. T.
core  

Estimativa de parâmetros genéticos para condutividade elétrica do leite para a raça holandesa utilizando regressão aleatória

open access: yesBoletim de Indústria Animal, 2012
O artigo não apresenta resumo em português.
Diego Augusto Campos da Cruz   +4 more
openaire   +6 more sources

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