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5. Reaction-induced iodine adsorption on Cu surfaces facilitates electrocatalytic CO2 reduction.

Author

Wang, Xinyue, Guo, Chenyan, Zhu, Bowen, Xiao, Daizhen, Gao, Dunfeng, Liu, Zhi, and Yang, Fan

Subjects
*INFRARED absorption, *ELECTROLYTIC reduction, *COPPER, *IODINE, *X-ray photoelectron spectroscopy, *ATOMIC force microscopy, *ADSORPTION (Chemistry)
Abstract

The electrolyte effect has been key to the electrochemical CO2 reduction reaction (CO2RR) and has received extensive attention in recent years. Here we combined atomic force microscopy, quasi-in situ X-ray photoelectron spectroscopy, and in situ attenuated total reflection surface-enhanced infrared absorption spectroscopy (ATR-SEIRAS) to study the effect of iodine anions on Cu-catalyzed CO2RR in the absence or presence of KI in the KHCO3 solution. Our results suggested that iodine adsorption caused coarsening of the Cu surface and altered its intrinsic activity for CO2RR. As the potential of the Cu catalyst became more negative, there was an increase in surface iodine anion concentration ([I−]), which could be connected to the reaction-enhanced adsorption of I− ions accompanying the increase in CO2RR activity. A linear relationship was observed between [I−] and current density. SEIRAS results further suggested that the presence of KI in the electrolyte strengthened the Cu–CO bond and facilitated the hydrogenation process, enhancing the production of CH4. Our results have thus provided insight into the role of halogen anions and aided in the design of an efficient CO2RR process. [ABSTRACT FROM AUTHOR]

Published
2023
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18. Single‐Cell Landscape Highlights Heterogenous Microenvironment, Novel Immune Reaction Patterns, Potential Biomarkers and Unique Therapeutic Strategies of Cervical Squamous Carcinoma, Human Papillomavirus‐Associated (HPVA) and Non‐HPVA Adenocarcinoma

Author

Qiu, Junjun, primary, Qu, Xinyu, additional, Wang, Yumeng, additional, Guo, Chenyan, additional, Lv, Bin, additional, Jiang, Qian, additional, Su, Wentao, additional, Wang, Li, additional, and Hua, Keqin, additional

Published
2023
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26. Additional file 1 of A novel Silva pattern-based model for precisely predicting recurrence in intermediate-risk cervical adenocarcinoma patients

Author

Guo, Chenyan, Tao, Xiang, Zhang, Lihong, Zhang, Ying, Hua, Keqin, and Qiu, Junjun

Abstract

Additional file 1: Table S1. Baseline characteristics of 345 patients with cervical adenocarcinoma. Table S2. The identification of cut-off value for intermediate risk factors in AC patients. Table S3. Performance comparison in best model. Table S4. Three-factor model performance comparison. Table S5. Three-factor model performance comparison

Published
2022
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36. Serum Circular FoxO3a Serves as a Novel Prognostic Biomarker in Squamous Cervical Cancer

Author

Tang,Xiaoyan, Liu,Songping, Ding,Yan, Guo,Chenyan, Guo,Jingjing, Hua,Keqin, and Qiu,Junjun

Subjects
Cancer Management and Research
Abstract

Xiaoyan Tang,1– 3,* Songping Liu,4,* Yan Ding,1– 3,* Chenyan Guo,1– 3 Jingjing Guo,1– 3 Keqin Hua,1– 3 Junjun Qiu1– 3 1Department of Gynecology, Obstetrics and Gynecology Hospital, Fudan University, Shanghai 200011, People’s Republic of China; 2Department of Obstetrics and Gynecology of Shanghai Medical College, Fudan University, Shanghai 200032, People’s Republic of China; 3Shanghai Key Laboratory of Female Reproductive Endocrine-Related Diseases, Shanghai 200011, People’s Republic of China; 4Department of Obstetrics and Gynecology, Zhenjiang Maternal and Child Health Hospital, Zhenjiang, Jiangsu 212001, People’s Republic of China*These authors contributed equally to this workCorrespondence: Junjun Qiu; Keqin HuaDepartment of Gynecology, Obstetrics and Gynecology Hospital of Fudan University, 419 Fangxie Road, Shanghai 200011, People’s Republic of ChinaTel +86-21-63455050 Ext 8261Fax +86-21-63455090Email qiujunjun1113@163.com; huakeqin@fudan.edu.cnPurpose: Circular RNAs (circRNAs) are novel type of noncoding RNAs that play important roles and serve as noninvasive biomarkers in various cancers. In the present study, we focused on circFoxO3a and aimed to investigate its prognostic value as a novel serum biomarker for squamous cervical cancer (SCC).Patients and Methods: Our study included 103 SCC patients from Obstetrics and Gynecology Hospital of Fudan University. Expression levels of circFoxO3a in the serum of patients with SCC were examined by reverse transcription‑quantitative PCR (RT‑qPCR). The correlation between serum circFoxO3a expression and clinicopathologic factors was analyzed. The Kaplan–Meier method and multivariate Cox regression analysis were applied to evaluate the independent prognostic factors for SCC. A prognostic predictive nomogram was constructed using R software.Results: Levels of serum circFoxO3a were decreased in SCC patients compared with controls. Low expression of circFoxO3a was correlated with deeper stromal invasion and positive lymph node metastasis. Moreover, SCC patients with lower expression of serum circFoxO3a showed poorer prognosis, including both overall survival (OS) and recurrence-free survival (RFS). Multivariate Cox analysis indicated low serum circFoxO3a levels to be an unfavorable prognostic factor for both OS and RFS, independent of positive lymph node metastasis. Notably, the predictive nomogram we established further confirmed that serum circFoxO3a is a useful tool for predicting survival in SCC.Conclusion: Altogether, our findings demonstrated that serum circFoxO3a could serve as a potential novel noninvasive predictive prognostic biomarker and therapeutic target for SCC.Keywords: circular RNA, FoxO3a, squamous cervical cancer, biomarker &nbsp

Published
2020

49. How Pseudo-lignin Is Generated during Dilute Sulfuric Acid Pretreatment

Author

Wan, Guangcong, Zhang, Qingtong, Li, Mingfu, Jia, Zhuan, Guo, Chenyan, Luo, Bin, Wang, Shuangfei, and Min, Douyong

Abstract

Pseudo-lignin is generated from lignocellulose biomass during pretreatment with dilute sulfuric acid and has a significant inhibitory effect on cellulase. However, the mechanism of pseudo-lignin generation remains unclear. The following main points have been addressed to help elucidate the pseudo-lignin generation pathway. Cellulose and xylan were pretreated with sulfuric acid at different concentrations; aliquots were periodically collected; and the changes in the byproducts of the prehydrolysate were quantified. Milled wood lignin (MWL) mixed with cellulose and xylan was pretreated to evaluate the impact of lignin on pseudo-lignin generation. Furfural, 5-hydroxymethylfurfural, and MWL were pretreated as model compounds to investigate pseudo-lignin generation. The result indicated that the increasing acid concentration significantly promoted the generation of pseudo-lignin. When the acid concentration was increased from 0 to 1.00 wt %, pseudo-lignin was increased from 1.36 to 4.05 g. In addition, lignin promoted the pseudo-lignin generation through the condensation between lignin and the generated intermediates.

Published
2024
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