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1.
PLoS One ; 19(2): e0297701, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-38354135

RESUMO

INTRODUCTION: ChatGPT, a sophisticated large language model (LLM), has garnered widespread attention for its ability to mimic human-like communication. As recent studies indicate a potential supportive role of ChatGPT in academic writing, we assessed the LLM's capacity to generate accurate and comprehensive scientific abstracts from published Randomised Controlled Trial (RCT) data, focusing on the adherence to the Consolidated Standards of Reporting Trials for Abstracts (CONSORT-A) statement, in comparison to the original authors' abstracts. METHODOLOGY: RCTs, identified in a PubMed/MEDLINE search post-September 2021 across various medical disciplines, were subjected to abstract generation via ChatGPT versions 3.5 and 4, following the guidelines of the respective journals. The overall quality score (OQS) of each abstract was determined by the total number of adequately reported components from the 18-item CONSORT-A checklist. Additional outcome measures included percent adherence to each CONOSORT-A item, readability, hallucination rate, and regression analysis of reporting quality determinants. RESULTS: Original abstracts achieved a mean OQS of 11.89 (95% CI: 11.23-12.54), outperforming GPT 3.5 (7.89; 95% CI: 7.32-8.46) and GPT 4 (5.18; 95% CI: 4.64-5.71). Compared to GPT 3.5 and 4 outputs, original abstracts were more adherent with 10 and 14 CONSORT-A items, respectively. In blind assessments, GPT 3.5-generated abstracts were deemed most readable in 62.22% of cases which was significantly greater than the original (31.11%; P = 0.003) and GPT 4-generated (6.67%; P<0.001) abstracts. Moreover, ChatGPT 3.5 exhibited a hallucination rate of 0.03 items per abstract compared to 1.13 by GPT 4. No determinants for improved reporting quality were identified for GPT-generated abstracts. CONCLUSIONS: While ChatGPT could generate more readable abstracts, their overall quality was inferior to the original abstracts. Yet, its proficiency to concisely relay key information with minimal error holds promise for medical research and warrants further investigations to fully ascertain the LLM's applicability in this domain.


Assuntos
Publicações Periódicas como Assunto , Humanos , Redação , Padrões de Referência , Publicações , Alucinações
2.
Phytochemistry ; 83: 153-67, 2012 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-22917955

RESUMO

Wattle (Acacia mearnsii) bark extract is an important renewable industrial source of natural polymers for leather tanning and adhesive manufacturing. The wattle bark proanthocyanidin oligomers have 5-deoxy extender units that render the interflavanyl bonds resistant to acid catalysed hydrolysis and their composition cannot be determined via conventional thiolysis. We combined established phyto- and synthetic chemistry perspectives with an electrospray mass spectrometry investigation to establish that the flavan-3-ol based oligomers consist of a starter unit which is either catechin or gallocatechin, angularly bonded to fisetinidol or predominantly robinetinidol extender units.


Assuntos
Acacia/química , Casca de Planta/química , Extratos Vegetais/química , Proantocianidinas/análise , Estrutura Molecular , Estereoisomerismo
3.
J Enzyme Inhib Med Chem ; 24(3): 632-7, 2009 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-18825533

RESUMO

In our present investigation, the crude methanol extract and chloroform fraction of the whole plant of Physalis minima Linn (Solanaceae) was investigated for anti-inflammatory, analgesic and antipyretic activities in NMRI mice and Wistar rats of either sex at 200 and 400 mg/kg, respectively. Various established in-vivo model's were used during the study. Both crude extract and chloroform fraction showed marked anti-inflammatory and analgesic activities as compared to a control at tested doses. The antipyretic potential of the crude extract and chloroform were insignificant in the Brewer's yeast fever model. Therefore, the whole plant of Physalis minima Linn could be considered as a potential candidate for bioactivity-guided isolation of natural anti-inflammatory and analgesic agents.


Assuntos
Analgésicos não Narcóticos/farmacologia , Analgésicos/farmacologia , Anti-Inflamatórios/farmacologia , Inflamação/tratamento farmacológico , Dor/tratamento farmacológico , Physalis/química , Preparações de Plantas/farmacologia , Analgésicos/isolamento & purificação , Analgésicos/uso terapêutico , Analgésicos não Narcóticos/isolamento & purificação , Analgésicos não Narcóticos/uso terapêutico , Animais , Anti-Inflamatórios/isolamento & purificação , Anti-Inflamatórios/uso terapêutico , Clorofórmio/química , Modelos Animais de Doenças , Edema/tratamento farmacológico , Edema/patologia , Feminino , Masculino , Metanol/química , Camundongos , Medição da Dor/efeitos dos fármacos , Fitoterapia , Extratos Vegetais/isolamento & purificação , Extratos Vegetais/farmacologia , Extratos Vegetais/uso terapêutico , Preparações de Plantas/isolamento & purificação , Preparações de Plantas/uso terapêutico , Ratos , Ratos Wistar , Fatores de Tempo
4.
Nat Prod Lett ; 16(6): 371-6, 2002 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-12462340

RESUMO

Two new oleanane triterpenes; 2alpha,3alpha,24-trihydroxyolean-12-ene-28,30-dioic acid ([structure: see text]) and 2alpha,3alpha,24,28-tetrahydroxyolean-12-ene ([structure: see text]) have been isolated from the roots of Atropa acuminata. Anti-oxidant p-hydroxyphenethyl trans-ferulate ([structure: see text]), beta-sitosterol-3-O-beta-D-glucopyranoside ([structure: see text]) and oleanolic acid ([structure: see text]) have also been reported for the first time from this species. The structures were determined by spectroscopic studies including 2D-NMR.


Assuntos
Antioxidantes/isolamento & purificação , Atropa/química , Ácido Oleanólico/isolamento & purificação , Plantas Medicinais/química , Triterpenos/isolamento & purificação , Antioxidantes/química , Antioxidantes/farmacologia , Ácidos Cumáricos/química , Ácidos Cumáricos/isolamento & purificação , Ácidos Cumáricos/farmacologia , Glucosídeos/química , Glucosídeos/isolamento & purificação , Glucosídeos/farmacologia , Concentração Inibidora 50 , Estrutura Molecular , Ressonância Magnética Nuclear Biomolecular , Ácido Oleanólico/análogos & derivados , Ácido Oleanólico/química , Ácido Oleanólico/farmacologia , Paquistão , Raízes de Plantas/química , Sitosteroides/química , Sitosteroides/isolamento & purificação , Sitosteroides/farmacologia , Espectrofotometria Infravermelho , Estereoisomerismo , Triterpenos/química , Triterpenos/farmacologia
5.
Nat Prod Lett ; 16(6): 415-8, 2002 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-12462347

RESUMO

A new triterpene named as alysinol 3alpha, 22beta-dihydroxyolean-12-ene [structure: see text] along with known compounds usnic acid, methyl 2,4-dihydroxy-3,6-dimethyl benzoate, 3-hydroxy benzoic acid, stigmasterol, poriferasterol and ursolic acid have been isolated from Alysicarpus monolifer. The structure of [structure: see text] has been established through spectroscopic techniques.


Assuntos
Ácido Oleanólico/isolamento & purificação , Extratos Vegetais/química , Plantas Medicinais/química , Triterpenos/isolamento & purificação , Acetilação , Benzoatos/química , Benzoatos/isolamento & purificação , Hidroxibenzoatos/química , Hidroxibenzoatos/isolamento & purificação , Metanol , Estrutura Molecular , Ressonância Magnética Nuclear Biomolecular , Ácido Oleanólico/análogos & derivados , Ácido Oleanólico/química , Paquistão , Triterpenos/química , Ácido Ursólico
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