Results 241 to 250 of about 135,103 (314)

A thematic analysis of UK COVID-19 vaccine hesitancy discussions on Twitter. [PDF]

BMC Public Health
Jameel R, Greenfield S, Lavis A.
europepmc   +1 more source

Clustering of twitter technology tweets and the impact of stopwords on clusters

, 2011
Surya Bhagvat
openalex   +2 more sources

Synthesis of β‐Hydroxy‐α,α‐dimethyl Carboxylic Esters via Asymmetric Barbier Reaction

European Journal of Organic Chemistry, Accepted Article.
Despite the occurrence of the β‐hydroxy‐α,α‐dimethyl carboxylic ester motif in many natural products no attempt was made to synthesize this core structure via a racemic and enantioselective Barbier reaction. In this study, the optimized reaction conditions for the achiral Barbier reaction between allyl bromide and a 2,2‐dimethyl‐3‐oxopropanoate were ...
Jan Grammel, Jasmina Amrouch, Wolfgang Frey, Anna Zens, Sabine Laschat   +4 more
wiley   +1 more source

New Glycoconjugates Containing Selenium and Polyphenols. Stereoselective Synthesis by Pummerer‐like Rearrangement

European Journal of Organic Chemistry, Accepted Article.
In the last 20 years the exploitation of antioxidant activity of selenobased compounds has improved, just due to the use of Ebselen, a selenocompound, as a Glutathione peroxidase (GPx) mimic. However, their clinical use seems to be compromised by the low solubility in water.
Claudia González, Mauro De Nisco, Reinier Lemos, Giovanna Cimmino, Yoana Pérez-Badell, Severina Pacifico, Silvana Pedatella   +6 more
wiley   +1 more source

Characterizing Experiences With Hikikomori Syndrome on Twitter Among Japanese-Language Users: Qualitative Infodemiology Content Analysis. [PDF]

JMIR Infodemiology
Uchiyama MA, Bekki H, McMann T, Li Z, Mackey T.   +4 more
europepmc   +1 more source

Enantioselective Anion‐Binding‐Catalyzed Nucleophilic Addition to 4‐Quinolones

European Journal of Organic Chemistry, Accepted Article.
Chiral quinolones and their derivatives are predominant synthetic building blocks and pharmacological agents. Nevertheless, their synthesis mostly relies on transition‐metal‐catalyzed enantioselective 1,4‐additions of organometallic reagents such as Grignard, organozinc or organoboron species for alkylation, arylation and alkynylation reactions. Herein,
Martin Aleksiev, Gaukhar Khassenova, Olga García Mancheño   +2 more
wiley   +1 more source

Exploring public perceptions of dementia on Twitter (X): a cross-cultural analysis. [PDF]

Alzheimers Dement
Srikajornlarp S, Lerksuthirat T, Patpong P, Ongphiphadhanakul B, Chattaris T.   +4 more
europepmc   +1 more source

A social network as information: The effect of system generated reports of connectedness on credibility on Twitter

, 2011
David Westerman, Patric R. Spence, Brandon Van Der Heide   +2 more
openalex   +2 more sources

Positive sentiment and expertise predict the diffusion of archaeological content on social media. [PDF]

Sci Rep
Bonacchi C, Krzyzanska M, Acerbi A.
europepmc   +1 more source

Health promotion campaigns using social media: association rules mining and co-occurrence network analysis of Twitter hashtags. [PDF]

BMC Public Health
Ghahramani A, Prokofieva M, de Courten MP.   +2 more
europepmc   +1 more source