Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 5 de 5
Filtrar
1.
ACS Appl Mater Interfaces ; 16(27): 34819-34829, 2024 Jul 10.
Artigo em Inglês | MEDLINE | ID: mdl-38924763

RESUMO

Sodium-ion batteries (SIBs) represent a promising energy storage technology with great safety. Because of their high operating potential, superior structural stability, and prominent thermal stability, polyanion-type phosphates have garnered significant interest in superior prospective cathode materials for SIBs. Nevertheless, the disadvantages of poor intrinsic electronic conductivity, sluggish kinetics, and volume variation during sodiation/desodiation remain great challenges for satisfactory rate performance and cycle stability, which severely hinder their further practical applications. In this work, by adjusting the amounts of pretreated multiwalled carbon nanotubes (CNT) added intentionally at the beginning of the preparation, biphasic polyanion-type phosphate materials (marked as NFC) are synthesized through a one-pot solid state reaction methodology, which are composed of CNT-interwoven Na3V2(PO4)2F3 (NVPF) and a small amount of Na3V2(PO4)3 (NVP). Benefiting from the improved electronic conductivity and unique composition and structure, the optimized sample (labeled as NFC-2) illustrates exceptional cycle stability and remarkable rate performance. The discharge capacities of the NFC-2 electrode are 114.8 and 78.6 mAh g-1 tested at 20 and 5000 mA g-1, respectively. Notably, such an electrode still gives out 75.7% capacity retention upon 10 000 cycles at 5000 mA g-1. In situ X-ray diffraction analysis demonstrates that the NFC-2 cathode has outstanding structural reversibility during charge/discharge cycles. More importantly, such a biphasic material has achieved impressive electrochemical performance within a wide operating temperature range of -20-50 °C. When temperature is decreased to -20 °C, the NFC-2 electrode still delivers an initial discharge capacity of 102.4 mAh g-1 and exhibits a remarkable capacity retention of 97.8% even after 500 cycles at 50 mA g-1. In addition, the sodium-ion full cell assembled by integrating NFC-2 cathode and hard carbon anode shows a satisfying energy density of 431.3 Wh kg-1 at 20 mA g-1 with a better long-term cycle performance. The synergistic effect among high energy NVPF, conductive CNT, and stable NVP may lead to the great improvement in the electrochemical sodium storage performance of the NFC-2 sample. Such biphasic polyanion-type phosphate materials will inject new ideas into the material design for SIBs with excellent electrochemical performance and further promote practical applications of this advanced energy storage technology.

2.
Zool Res ; 45(3): 617-632, 2024 May 18.
Artigo em Inglês | MEDLINE | ID: mdl-38766745

RESUMO

The Chinese tree shrew ( Tupaia belangeri chinensis) has emerged as a promising model for investigating adrenal steroid synthesis, but it is unclear whether the same cells produce steroid hormones and whether their production is regulated in the same way as in humans. Here, we comprehensively mapped the cell types and pathways of steroid metabolism in the adrenal gland of Chinese tree shrews using single-cell RNA sequencing, spatial transcriptome analysis, mass spectrometry, and immunohistochemistry. We compared the transcriptomes of various adrenal cell types across tree shrews, humans, macaques, and mice. Results showed that tree shrew adrenal glands expressed many of the same key enzymes for steroid synthesis as humans, including CYP11B2, CYP11B1, CYB5A, and CHGA. Biochemical analysis confirmed the production of aldosterone, cortisol, and dehydroepiandrosterone but not dehydroepiandrosterone sulfate in the tree shrew adrenal glands. Furthermore, genes in adrenal cell types in tree shrews were correlated with genetic risk factors for polycystic ovary syndrome, primary aldosteronism, hypertension, and related disorders in humans based on genome-wide association studies. Overall, this study suggests that the adrenal glands of Chinese tree shrews may consist of closely related cell populations with functional similarity to those of the human adrenal gland. Our comprehensive results (publicly available at http://gxmujyzmolab.cn:16245/scAGMap/) should facilitate the advancement of this animal model for the investigation of adrenal gland disorders.


Assuntos
Glândulas Suprarrenais , Esteroides , Animais , Glândulas Suprarrenais/metabolismo , Humanos , Esteroides/biossíntese , Esteroides/metabolismo , Transcriptoma , Camundongos , Tupaiidae , Feminino , Multiômica
3.
Integr Cancer Ther ; 20: 15347354211002919, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-33834863

RESUMO

OBJECTIVE: To provide higher level evidence on the benefits of a Chinese patent medicine (CPM) (Fufang E'jiao Syrup, FFEJS) for alleviating cancer-related fatigue (CRF), this article describes a protocol for a randomized controlled trial. METHODS/DESIGN: We designed a double-blind, placebo-controlled stratified permuted block randomization clinical trial on CRF among 3 types of cancer in China. Participants will be equally allocated to FFEJS group or placebo group according to the randomization sequence and the hospitals they were enrolled at. Each patient will receive 20 ml of either the study formula FFEJS or a placebo formula, 3 times a day for 6 weeks. The follow-up period will be another 4 weeks for safety evaluation. The primary outcome is the difference in improvement of fatigue as measured with the Revised Piper Fatigue Scale-Chinese Version (RPFS-CV). Secondary outcomes include change in fatigue (measured by routine blood panel and hormones in peripheral blood) and QoL (measured by Edmonton symptom assessment scale and Functional Assessment of Cancer Therapy). Patient safety will be measured by liver, renal or cardiac damage, and the risk of FFEJS having a tumor promotion and progression effect will be monitored throughout this study. Cost-effectiveness will also be evaluated mainly by incremental cost per each quality-adjusted life year gained. DISCUSSION: This article describes the study design of a CPM for CRF in patients with advanced cancer through exploring the effectiveness, safety, and cost-effectiveness of FFEJS. TRIAL REGISTRATION: ClinicalTrials.gov, NCT04147312. Registered on 1 Sep 2019.


Assuntos
Medicamentos de Ervas Chinesas , Neoplasias , China , Análise Custo-Benefício , Método Duplo-Cego , Medicamentos de Ervas Chinesas/uso terapêutico , Fadiga/tratamento farmacológico , Fadiga/etiologia , Humanos , Estudos Multicêntricos como Assunto , Neoplasias/complicações , Neoplasias/tratamento farmacológico , Medicamentos sem Prescrição , Qualidade de Vida , Ensaios Clínicos Controlados Aleatórios como Assunto , Resultado do Tratamento
4.
Chin J Integr Med ; 26(4): 256-262, 2020 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-31970675

RESUMO

OBJECTIVE: To evaluate the effect of Chinese herbal medicine formula, modified Liujunzi Decoction (, MLJZT), for anorexia, utilized as adjunct therapy during chemotherapy treatment for patients with advanced non-small cell lung cancer (NSCLC). METHODS: The study adopted a propensity score-matched design based on a prospective database. From February 2016 to September 2017, patients with advanced NSCLC that received both cisplatin-based chemotherapy and MLJZT (IM group) were 1:1 propensity score-matched to patients that received the cisplatin-based chemotherapy alone (control group). Changes in anorexia and weight, as well as side effects were evaluated per week within 4-cycle chemotherapy. RESULTS: Overall, 156 patients with advanced NSCLC that had received chemotherapy from our database were identified and 53 pairs were matched successfully. In total, 48.6% (50/53) of patients in the IM group had anorexia-improvement compared to 28.3% (15/53) of patients in the control group, and a total of 39.6% (21/53) of patients in the control group had a worsening of anorexia compared to only 7.8% (8/53) of patients in the IM group (P<0.01). The weight reduced significantly over time in the control group (-2.36 ± 2.53 kg) as compared to the IM group (-0.62 ± 3.89 kg, P<0.01). CHM didn't reduce the efficacy of chemotherapy in shrinking tumor size, and didn't increase the incidence of side effects such as hematological and hepatorenal toxicity. CONCLUSION: MLJZT is effective and safe for alleviating anorexia in patients with NSCLC. These findings warrant the conduct of a randomized controlled trial.


Assuntos
Anorexia/tratamento farmacológico , Protocolos de Quimioterapia Combinada Antineoplásica/efeitos adversos , Carcinoma Pulmonar de Células não Pequenas/tratamento farmacológico , Medicamentos de Ervas Chinesas/uso terapêutico , Neoplasias Pulmonares/tratamento farmacológico , Anorexia/induzido quimicamente , Antineoplásicos/administração & dosagem , Protocolos de Quimioterapia Combinada Antineoplásica/uso terapêutico , Estudos de Casos e Controles , Cisplatino/administração & dosagem , Humanos , Manipulações Musculoesqueléticas , Pontuação de Propensão
5.
J Sep Sci ; 40(1): 81-92, 2017 01.
Artigo em Inglês | MEDLINE | ID: mdl-27731929

RESUMO

There is a recognized challenge in analyzing traditional Chinese medicine formulas because of their complex chemical compositions. The application of modern analytical techniques such as high-performance liquid chromatography coupled with a tandem mass spectrometry has improved the characterization of various compounds from traditional Chinese medicine formulas significantly. This study aims to conduct a bibliometric analysis to recognize the overall trend of high-performance liquid chromatography coupled with tandem mass spectrometry approaches in the analysis of traditional Chinese medicine formulas, its significance and possible underlying interactions between individual herbs in these formulas. Electronic databases were searched systematically, and the identified studies were collected and analyzed using Microsoft Access 2010, Graph Pad 5.0 software and Ucinet software package. 338 publications between 1997 and 2015 were identified, and analyzed in terms of annual growth and accumulated publications, top journals, forms of traditional Chinese medicine preparations and highly studied formulas and single herbs, as well as social network analysis of single herbs. There is a significant increase trend in using high-performance liquid chromatography coupled with tandem mass spectrometry related techniques in analysis of commonly used forms of traditional Chinese medicine formulas in the last 3 years. Stringent quality control is of great significance for the modernization and globalization of traditional Chinese medicine, and this bibliometric analysis provided the first and comprehensive summary within this field.


Assuntos
Bibliometria , Cromatografia Líquida de Alta Pressão , Medicamentos de Ervas Chinesas/análise , Espectrometria de Massas em Tandem , Espectrometria de Massas , Medicina Tradicional Chinesa/tendências
SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA