Nature
Mostrando 1-12 de 13169 artigos, teses e dissertações.
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1. Study of rhombohedral tricalcium phosphate in hexagonal crystal structure family on the sample prepared by the sol-gel route and the effect of calcination temperature
Abstract The effect of the calcination temperature at 800 and 1000 °C on the stable formation of the tricalcium phosphate with rhombohedral structure in the system of the hexagonal crystal family was determined, while its precursor was made from limestone obtained from nature in the Lumajang district, Indonesia. The rhombohedral tricalcium phosphate samples
Cerâmica. Publicado em: 2023
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2. Nicotine as a Catalyst for Chlorination Promoted by Hypochlorous Acid: Experimental and Theoretical Studies
There is robust evidence of the hypochlorous acid (HClO)-mediated damage in biomolecules, and nicotine boosts the chlorination potency of HClO. We present experimental and theoretical evidence of the mechanism by which nicotine catalyzes the chlorination of pyranine. The rate constants for chlorination of pyranine by HClO were measured in the presence (5.3 �
Journal of the Brazilian Chemical Society. Publicado em: 2023
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3. Mapping the psychoanalytic literature on bipolar disorder: a scoping review of journal articles
Objective: To provide a review of journal articles discussing clinical cases or vignettes of psychoanalysis or psychoanalytic psychotherapy of patients affected by bipolar disorder. Methods: A thorough search of journal articles was performed in five databases to identify studies published from 1990-2021. Results: Twenty-four articles were included in this
Brazilian Journal of Psychiatry. Publicado em: 2023
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4. O Apocalipse da natureza de Walking Stewart (1747-1822): Um excêntrico no Iluminismo?
Resumo Este artigo versa sobre o viajante e pensador londrino John Walking Stewart (1747-1822), figura pouco estudada entre os historiadores. Quase todos os registros encontrados sobre o andarilho consideram-no, tanto em sua época como na posteridade, um “excêntrico”. De acordo com Benjamin Rush, o próprio autor teria dito que, “enquanto o centro da
Varia Historia. Publicado em: 2022
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5. DO LINGUISTIC MEANINGS MEET LINGUISTIC FORM?
Abstract In this brief note, I offer some considerations to the effect of arguing (i) that Duffley's criticism to formal semantics is based on a dogma about the proper nature of the linguistic sing, and (ii) that, even when I agree with the general spirit of his realizational theory of meaning, an explicit theory of how syntax affects meanings realization is
Manuscrito. Publicado em: 2022
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6. The anxiolytic effect of cannabidiol depends on the nature of the trauma when patients with post-traumatic stress disorder recall their trigger event
Objectives: We assessed whether administering cannabidiol (CBD) before recalling the traumatic event that triggered their disorder attenuates anxiety in patients with post-traumatic stress disorder (PTSD). As an exploratory pilot analysis, we also investigated whether this effect depends on the nature of the event (sexual vs. nonsexual trauma). Methods: Thi
Brazilian Journal of Psychiatry. Publicado em: 2022
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7. Virtual and Augmented Reality in Cardiac Surgery
Abstract Virtual and augmented reality can be defined as a three-dimensional real-world simulation allowing the user to directly interact with it. Throughout the years, virtual reality has gained great popularity in medicine and is currently being adopted for a wide range of purposes. Due to its dynamic anatomical nature, permanent drive towards decreasing i
Brazilian Journal of Cardiovascular Surgery. Publicado em: 2022
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8. O saber nos labirintos do poder: a Europa e a (inter)nacionalização da ciência na primeira metade do século XX
Resumo A primeira metade do século XX foi globalmente marcada por uma vaga nacionalista que não deixou a ciência incólume. As iniciativas de bloqueio de algumas “ciências nacionais” (em particular a ciência oriunda da Alemanha) e as ruidosas discussões que então inundaram o espaço público ocidental constituem marcas ineludíveis das transforma�
História, Ciências, Saúde-Manguinhos. Publicado em: 2022
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9. Recent Developments on Palladium-Catalyzed Carbonylation Reactions in Renewable Solvents
Palladium-catalyzed carbonylation reaction has surfaced as a robust tool for insertion of the carbonyl group into organic molecules, and in the last decades enormous progress has been made. Nowadays, a plethora of methodologies is available to synthesize all kinds of carbonyl compounds. However, the focus has shifted during recent years to address rising con
Journal of the Brazilian Chemical Society. Publicado em: 2022
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10. Unveiling the Bacterial Sesquiterpenome of Streptomyces sp. CBMAI 2042 Discloses Cyclases with Versatile Performances
Terpenes are the most abundant class of natural product that exist in nature. They possess a myriad of industrial applications including pharmaceutical, perfumery and flavors, bulk chemicals, and fuel. Intriguingly, until today, the vast majority of characterized terpenoids have been isolated from plants and fungi, and only in recent years bacteria were foun
Journal of the Brazilian Chemical Society. Publicado em: 2022
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11. Oxigênio no contexto da COVID-19: o que sabemos sobre a molécula que respiramos e o papel central da química
OXYGEN IN THE COVID-19 CONTEXT: WHAT WE KNOW ABOUT THE MOLECULE WE BREATHE AND THE CENTRAL ROLE OF CHEMISTRY. In this work, the role of chemistry in the coronavirus disease 2019 (COVID-19) pandemic is highlighted through the medical oxygen supply crises in Brazil, as an example of oxygen utility in health. Starting from oxygen chemical characterization, the
Química Nova. Publicado em: 2022
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12. Gene Silencing Therapeutics in Cardiology: A Review Article
Abstract Therapeutics that inhibit enzymes, receptors, ion channels, and cotransporters have long been the mainstay of cardiovascular medicine. Now, oligonucleotide therapeutics offer a modern variation on this paradigm of protein inhibition. Rather than target a protein, however, small interfering ribonucleic acids and antisense oligonucleotides target the
International Journal of Cardiovascular Sciences. Publicado em: 2022