Results 81 to 90 of about 39,305 (203)

Perehdytysmateriaalin päivittäminen Kokkolan 4H-yhdistykselle [PDF]

, 2019
Tämän toiminnallisen opinnäytetyön toimeksiantajana toimi Kokkolan 4H-yhdistys. Opinnäytetyön aiheena oli päivittää Kokkolan 4H-yhdistyksen vanha perehdytysopas tähän päivään. Vanha perehdytysopas oli vain paperiversiona ja opas oli sekava.
Koskela, Minna
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4H-liiton Ysit töihin -projektin vaikutus nuoriin [PDF]

, 2020
Tämän opinnäytetyön tarkoituksena on selvittää 4H-liiton Ysit töihin – projektin vaikutuksia projektissa mukana olleiden nuorten elämään. Työllä halutaan selvittää projektin vaikutuksia esimerkiksi nuorten asenteisiin, tulevaisuuden suunnitelmiin ...
Nurmi, Ville-Valtteri
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Pyrans and Their Benzo Derivatives:Synthesis

, 2020
Newly reported synthetic procedures to access pyrans and their benzo derivatives from 2007 to 2018 are summarized. The sub-chapters are organized by the structural similarity starting from pyrans, reduced, oxidized, and benzene-fused structures ...
Lauridsen, Jerik Mathew Valera, Lee, Ji-Woong, Kragh, Rasmus Refsgaard   +2 more
core   +1 more source

Facile One-Pot Synthesis of Photochromic Pyrans

, 2016
Photochromic pyrans, including [3H]naphtho[2,1-b]pyrans, [2H]naphtho[1,2-b]pyrans, indeno-fused naphtho[1,2-b]pyrans, and heteroannulated pyrans, were synthesized in excellent yields through a facile one-pot procedure by reaction of propargyl alcohol and
Weili Zhao (1694086), Erick M. Carreira (1330920)   +1 more
core   +1 more source

Development Of Si02 Thin Film On singlecrystal Sic By anodic oxidation technique. [PDF]

, 2008
Anodic silicon dioxide (Si02) thin film is growth on p- and n-type silicon (Si) and p-type 4H-silicon carbide (SiC) substrate with the thickness ranging from 50-130 nm.
Cheong, Kuan Yew, Purwadaria, Sunara, Lockman, Zainovia   +2 more
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Nitriles in heterocyclic synthesis: Novel syntheses of benzo[b]pyrans, naphtho[1,2-b]pyrans, naphtho[2,1-b]pyrans, pyrano[3,2-h]quinolines and pyrano[3,2-c]quinolines

, 1988
Benzo[b]pyrans, naphtho[1,2-b]pyrans, naphtho[2,1-b]pyrans, pyrano[3,2-h]quinolines, and pyrano[3,2-c]quinolines were synthesized by the reaction of cinnamonitriles with phenols, naphthols, 8-hydroxyquinoline, and 1-methyl-4-hydroxy-2-quinoline.
Mohamed H. Elnagdi, Abdel Ghani A. Elagamey, Fathy M. A. El-Taweel, Salah Z. Sawllim   +3 more
core   +1 more source

A novel biopolymer-based nanomagnetic catalyst for the synthesis of 4H-pyran and tetrahydro-4H-chromene derivatives

, 2023
In the present study, we have designed and synthesized a new magnetically recoverable, nanocatalyst of Ag/Fe3O4@starch. The successful synthesis and the structure of the nanocatalyst were confirmed and evaluated with several analytical techniques ...
Mohammadzadeh, Amin, Marjania, Ahmad Poursattar, Zamani, Asghar   +2 more
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Silver nanoparticles-decorated Preyssler functionalized cellulose biocomposite as a novel and efficient catalyst for the synthesis of 2-amino-4H-pyrans and spirochromenes. [PDF]

Sci Rep, 2020
Saneinezhad S, Mohammadi L, Zadsirjan V, Bamoharram FF, Heravi MM.   +4 more
europepmc   +1 more source

Reações multicomponente combinadas com reações de huisgen na síntese de compostos híbridos perilil-4H-piranos [PDF]

, 2017
Existem diversos produtos naturais que apresentam em sua estrutura anéis de 4HPiranos substituídos, sendo que muitos deles apresentam atividade biológica e farmacológica, o que os torna uma fonte inspiradora para o desenvolvimento de novos fármacos.
Paczkowski, Ingrid Maliszewski
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The use of 4-R1-benzylidene-4-phenylbenzoylacetonitriles for synthesis of unsymmetrically substituted 3,5-dicyano-1,4-dihydropyridines and 2-amino-4H-pyrans

, 1983
3,5-Dicyano-1,4-dihydropyridine derivatives III-V have been prepared by cyclocondensation of benzylidene-4-phenylbenzoylacetonitrile (Ia) with the enamines IIa-IIc.
Štefan Marchalín, Josef Kuthan
core   +1 more source