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| 1 | Genome of Plant Maca (Lepidium meyenil) Illuminates Genomic Basis for High-Altitude Adaptation in the Central Andes显示文摘Maca (Lepidium meyenii Walp, 2n = 8x = 64 ) ,属于 Brassicaceae 家庭,经济植物在秘鲁(4000-4500 m ) 在中央安第斯山脉岭被栽培。认为快速中央安第斯山脉高举发生 5-10 百万年以前(妈) ,一个进化问题关于象 maca 那样的植物怎么在一个短地质的时期以内获得高高度的改编产生。这里,我们报导 maca 的高质量的染色体集会,在里面它二仔细 spaced maca 特定的整个染色体的复制(WGD;6.7 妈) 被识别。在 maca 和密切相关的 Brassicaceae 种类之间的比较 genomic 分析揭示了经由 WGD 涉及不能生活的压力反应,荷尔蒙发信号小径,和第二等的代谢物生合成的 maca 基因和基因家庭的扩大。保留和许多复制基因的随后的功能的分叉可以说明词法、生理的变化(即,小叶形状和自我富饶) 在在高高度的环境的 maca。另外,一些复制 maca 基因在词法改编与功能被识别(即,叶卷应答) 并且不能生活的压力反应(即, GLYCINE 富有的 RNA 有约束力的蛋白质和 DNA-DAMAGE-REPAIR/TOLERATION 2 ) 在积极选择下面。一起, maca 染色体提供有用信息在安第斯山脉在植物的高高度的改编理解 WGD 的重要角色。 | Jing Zhang Yang Tian Liang Yan GuanghuiZhang Xiao Wang Yan Zeng Jiajin Zhang Xiao Ma Yuntao Tan Ni Long Yangzi Wang Yujin Ma Yuqi He Yu Xue Shumei Hao Shengchao Yang Wen Wang Liangsheng Zhang Yang Dong Wei Chen Jun Sheng | 2016 | Molecular Plant2016，9，7： | 9 |
| 2 | Comparative study on skin temperature response to menstruation at acupuncture points in healthy volunteers and primary dysmenorrhea patients显示文摘OBJECTIVE:To assess skin temperature response to menstruation at acupuncture points in primary dysmenorrhea(PD) patients and healthy volunteers so as to explore acupuncture point specificity in reflecting diseases in the light of skin temperature.METHODS:Fifty-two PD patients and 49 healthy volunteers were recruited.Skin temperature measurements were performed with a skin temperature assessment device at 10 points.Absolute difference between skin temperature of the same point on the left and right side is used as main outcome measure.RESULTS:On the first day of menstruation, when menstrual pain attacking in PD patients, a significant increase in skin temperature difference was detected at Taixi(KI 3) compared with the healthy group(P < 0.01).A significant reduction in skin temperature difference was detected at Taixi(KI 3) in the first day of menstruation compared with those values in the third day after menstruation(P < 0.01)in the healthy group.On the third day after menstruation, a significant reduction in skin temperature difference was found at Zhongdu(LR 6) in PD group compared with the healthy group(P < 0.05).No significant differences of skin temperature were detected at other points(P > 0.05).CONCLUSION:The skin temperature difference at menstruation-relevant points in PD patients did not all change significantly more than those in women without PD.Significant difference was only found in Taixi(KI 3), the Yuan-source point of Kidney meridian. | She Yanfen Ma Liangxiao Zhu Jiang Qi Conghui Wang Yanxia Tang Ling Li Chunhua Yuan Hongwen Liu Yuqi Song Jiashan | 2017 | Journal of Traditional Chinese Medicine2017，37，2： | 8 |
| 3 | Regulation of phenylpropanoid biosynthesis by MdMYB88 and MdMYB124 contributes to pathogen and drought resistance in apple显示文摘MdMYB88 and MdMYB124 have been demonstrated to be responsible for lignin accumulation in apple under drought stress.In this study,using a metabolomic approach,we identified differentially accumulated phenylpropanoid and flavonoid metabolites in MdMYB88/124 transgenic RNAi plants under control and long-term drought stress conditions in apple roots.We confirmed the regulation of phenylalanine by MdMYB88 and MdMYB124 via UPLC-MS in apple roots under both control and drought conditions.Using Electrophoretic Mobility Shift Assay(EMSA)and ChIPquantitative PCR(qPCR)analyses,we found that MdMYB88 positively regulates the MdCM2 gene,which is responsible for phenylalanine biosynthesis,through binding to its promoter region.Under long-term drought conditions,MdMYB88/124 RNAi plants consistently accumulated increased amounts of H2O2 and MDA,while MdMYB88 and MdMYB124 overexpression plants accumulated decreased amounts of H2O2 and MDA.We also examined the accumulation of metabolites in the phenylpropanoid biosynthesis pathway in the leaves of MdMYB88 and MdMYB124 transgenic apple plants after long-term drought stress.We found that metabolites responsible for plant defense,including phenylpropanoids and flavonoids,accumulated less in the RNAi plants but more in the overexpression plants under both control and drought conditions.We further demonstrated that MdMYB88/124 RNAi plants were more sensitive to Alternaria alternata f.sp.mali and Valsa mali,two pathogens that currently severely threaten apple production.In contrast,MdMYB88 and MdMYB124 overexpression plants were more tolerant to these pathogens.The cumulative results of this study provided evidence for secondary metabolite regulation by MdMYB88 and MdMYB124,further explained the molecular roles of MdMYB88 and MdMYB124 in drought resistance,and provided information concerning molecular aspects of their roles in disease resistance. | Dali Geng Xiaoxia Shen Yinpeng Xie Yusen Yang Ruiling Bian Yuqi Gao Pengmin Li Liying Sun Hao Feng Fengwang Ma Qingmei Guan | 2020 | Horticulture Research2020，7，1： | 5 |
| 4 | Modeling cascading failures and mitigation strategies in PMU based cyber-physical power systems显示文摘This paper presents a model of cascading failures in cyber-physical power systems(CPPSs) based on an improved percolation theory, and then proposes failure mitigation strategies. In this model, the dynamic development of cascading failures is divided into several iteration stages. The power flow in the power grid, along with the data transmission and delay in the cyber layer, is considered in the improved percolation theory. The interaction mechanism between two layers is interpreted as the observability and controllability analysis and data update analysis influencing the node state transformation and security command execution. The resilience indices of the failures reflect the influence of cascading failures on both topological integrity and operational state. The efficacy of the proposed mitigation strategies is validated, including strategies to convert some cyber layer nodes into autonomous nodes and embed unified power flow controller(UPFC) into the physical layer. The results obtained from simulations of cascading failures in a CPPS with increasing initial failure sizes are compared for various scenarios.Dynamic cascading failures can be separated into rapid and slow processes. The interdependencies and gap between the observable and controllable parts of the physical layer with the actual physical network are two fundamental reasons for first-order transition failures. Due to the complexity of the coupled topological and operational relations between the two layers, mitigation strategies should be simultaneously applied in both layers. | Yuqi HAN Chuangxin GUO Shiying MA Dunwen SONG | 2018 | Journal of Modern Power Systems and Clean Energy2018，6，5： | 5 |
| 5 | Radiation theory comparison for magnetoacoustic tomography with magnetic induction(MAT-MI)显示文摘Based on the principle of Lorentz force induced acoustic vibration, radiation theory comparison between acoustic point and dipole sources was conducted for magnetoacoustic tomography with magnetic induction(MAT-MI). It is proved that each acoustic source of MATMI is produced by the divergence of the magnetically induced Lorentz force, and the detected acoustic pressure is the integral of all diffraction sources inside the object.Wave clusters are produced by abrupt pressure changes at conductivity boundaries, and only the configurations in terms of shape and size of phantom models can be reconstructed. However, different from point source, positive and negative pressures are generated by the radiation pattern of dipole sources. Reverse vibration phases of wave clusters in collected waveforms and opposite polarities of borderline stripes in reconstructed images are produced at conductivity boundaries, representing the direction of conductivity changes. The experimentally collected waveforms and reconstructed images of the aluminum foil cylinder and cylindrical saline gel phantom model agree well with simulated results. The favorable results prove the validity of the radiation theory of acoustic dipole source and provide basis for further investigation of conductivity reconstruction for MAT-MI. | Xiaodong Sun Yuqi Zhou Qingyu Ma Dong Zhang | 2014 | Chinese Science Bulletin2014，59，26： | 3 |
| 6 | The cost of obsessive- compulsive disorder (OCD) in China: a multi- center cross- sectional survey based on hospitals显示文摘Background Obsessive-compulsive disorder(OCD)is considered a very debilitating disorder with severe loss of quality of life and income.Aims This study estimates the quality of life and economic consequences of OCD in China.Methods The research team interviewed 639 patients with OCD in 13 hospitals in 12 cities in China.The direct method was used to get the direct cost of OCD.Indirect costs associated with OCD were estimated using the human capital approach.Linear regression analysis was conducted for quality of life and generalised linear model analysis was conducted for total cost.Sensitivity analysis was used to analyse the uncertainty of total cost.Results The mean quality of life score for OCD was 52.78(20.46).The annual total cost of OCD per capita was 24503.78(95%CI:22621.53 to 26386.03)renminbi(RMB)(US$3465.88(95%CI:US$3199.65 to US$3732.11)).The annual cost of OCD in China was estimated to be 37.74 billion(95%CI:34.95 billion to 40.53 billion)RMB(equal to US$5.34 billion(95%CI:US$4.94 billion to US$5.73 billion)).Sensitivity analysis showed that the total annual cost of OCD in China was between 23.15 billion RMB(US$3.27 billion)and 370.00 billion RMB(US$52.33 billion).Worse social function status,more psychiatric symptoms and higher Yale Brown Obsessive-Compulsive Scale(Y-BOCS)score were associated with worse quality of life.The numbers of clinic visits and hospitalisations,socioeconomic status,education,Y-BOCS scores and age were found to be significantly associated with total cost.Conclusions OCD is associated with low quality of life and high costs in China.The findings call for concerted efforts to improve services for patients with OCD.Improvements may include early detection and diagnosis,the provision of evidence-based treatments and relapse prevention strategies. | Weili Yang Zhen Tang Xijin Wang Xiancang Ma Yuqi Cheng Bin Wang Ping Sun Wenxin Tang Jia Luo Changhong Wang Ping Li Guiyun Xu Jun Yan Vlasios Brakoulias Zhen Wang | 2021 | General Psychiatry2021，34，6： | 3 |
| 7 | Surveillance of emerging infectious diseases for biosecurity显示文摘Emerging infectious diseases, such as COVID-19, continue to pose significant threats to human beings and their surroundings. In addition, biological warfare, bioterrorism, biological accidents, and harmful consequences arising from dual-use biotechnology also pose a challenge for global biosecurity. Improving the early surveillance capabilities is necessary for building a common biosecurity shield for the global community of health for all. Furthermore, surveillance could provide early warning and situational awareness of biosecurity risks. However, current surveillance systems face enormous challenges, including technical shortages, fragmented management, and limited international cooperation. Detecting emerging biological risks caused by unknown or novel pathogens is of particular concern. Surveillance systems must be enhanced to effectively mitigate biosecurity risks. Thus, a global strategy of meaningful cooperation based on efficient integration of surveillance at all levels, including interdisciplinary integration of techniques and interdepartmental integration for effective management, is urgently needed. In this paper, we review the biosecurity risks by analyzing potential factors at all levels globally. In addition to describing biosecurity risks and their impact on global security, we also focus on analyzing the challenges to traditional surveillance and propose suggestions on how to integrate current technologies and resources to conduct effective global surveillance. | Rongzhang Hao Yuqi Liu Wanzhu Shen Rongtao Zhao Bo Jiang Hongbin Song Muyang Yan Hui Ma | 2022 | Science China(Life Sciences)2022，65，8： | 2 |
| 8 | All-Climate Stretchable Dendrite-Free Zn-Ion Hybrid Supercapacitors Enabled by Hydrogel Electrolyte Engineering显示文摘Hybrid supercapacitors have shown great potentials to fulfill the demand of future diverse applications such as electric vehicles and portable/wearable electronics.In particular,aqueous zinc-ion hybrid supercapacitors(ZHSCs)have gained much attention due to their low-cost,high energy density,and environmental friendliness.Nevertheless,typical ZHSCs use Zn metal anode and normal liquid electrolyte,causing the dendrite issue,restricted working temperature,and inferior device flexibility.Herein,a novel flexible Zn-ion hybrid supercapacitor(FZHSC)is developed by using activated carbon(AC)anode,δ-MnO_(2) cathode,and innovative PVA-based gel electrolyte.In this design,heavy Zn anode and its dendrite issue are avoided and layered cathode with large interlayer spacing is employed.In addition,flexible electrodes are prepared and integrated with an anti-freezing,stretchable,and compressible hydrogel electrolyte,which is attained by simultaneously using glycerol additive and freezing/thawing technique to regulate the hydrogen bond and microstructure.The resulting FZHSC exhibits good rate capability,high energy density(47.86 Wh kg^(−1);3.94 mWh cm^(−3)),high power density(5.81 kW kg^(−1);480 mW cm^(−3)),and excellent cycling stability(~91%capacity retention after 30000 cycles).Furthermore,our FZHSC demonstrates outstanding flexibility with capacitance almost unchanged even after various continuous shape deformations.The hydrogel electrolyte still maintains high ionic conductivity at ultralow temperatures(≤−30℃),enabling the FZHSC cycled well,and powering electronic timer robustly within an all-climate temperature range of−30~80℃.This work highlights that the promising Zn metal-free aqueous ZHSCs can be designed with great multifunctionality for more practical application scenarios. | Yuqi Jiang Kun Ma Meiling Sun Yuanyuan Li Jinping Liu | 2023 | Energy & Environmental Materials2023，6，2： | 2 |
| 9 | Prevalence of transmitted drug resistance mutations among patients infected with human immunodeficiency virus type 1 (HIV-1) in Henan Province, China显示文摘To the Editor:Even with the emergence of highly active antiretroviral therapy,human immunodeficiency virus type 1(HIV-1)remains a serious public health problem worldwide.The widespread use of antiretroviral therapy(ART)has,on the one hand,significantly improved life expectancy in patients infected with HIV-1;on the other hand,it has inevitably brought along with it a difficult problem—viral resistance.Viral resistance is a common phenomenon evolutionarily,particularly in patients with poor adherence and suboptimal drug levels. | Jinjin Liu Xiaohua Zhang Mingjie Hou Shuguang Wei Jie Ma Lixia Xu Xuan Yang Yan Sun Chunli Liu Qingxia Zhao Yuqi Huo | 2022 | Chinese Medical Journal2022，135，22： | 2 |
| 10 | Traditional Chinese Medicine guidelines for coronavirus disease 2019显示文摘OBJECTIVE:To summarize the evidence from Traditional Chinese Medicine(TCM)practice in the treatment of coronavirus disease 2019(COVID-19)and provide timely clinical practice guidance.METHODS:The guidelines were developed in accordance with the World Health Organization rapid guideline process.The evidence on TCM for COVID-19 from published guidelines,direct and indirect published clinical evidence,first hand clinical data,and expert experience and consensus were collected.The grading of recommendations assessment,development and evaluation(GRADE)method was used to grade the evidence and make the recommendations.RESULTS:Based on the available evidence,the guidelines recommended 17 Chinese medicines for COVID-19:2 Chinese herbal granules,7 Chinese patent medicines,and 8 Chinese herbal injections.CONCLUSION:As the literature search was conducted on March,any subsequent versions of these guidelines require an up-to-date literature review.We hope that the evidence summary in these guidelines will be helpful in global efforts to address COVID-19. | Liang Ning Ma Yanfang Wang Jingya Li Huizhen Wang Xiaohui Jiao Liwen Liu Bin Ma Yan Zhao Chen Luo Xufei Zhao Siya Lu Meng Cao Jin Hu Wenpin Zhang Hairong Liu Guoxiu Lu Cheng Liu Mengyu Li Li Han Xuejie Liu Yuqi Wang Liying Zhao Xueyao Wei Dongfeng Bai Jing Sun Mingyu Yang Yong Wu Xiaodan Chen Yaolong Shi Nannan Wang Yanping Wang Yongyan | 2020 | Journal of Traditional Chinese Medicine2020，40，6： | 2 |
| 11 | Efficient production of cyclic adenosine monophosphate from adenosine triphosphate by the N-terminal half of adenylate cyclase from Escherichia coli显示文摘In this study,we aimed at developing an efficient biocatalytic process for bio-production of cyclic adenosine monophosphate(c AMP)from adenosine triphosphate(ATP).First,adenylate cyclase from Escherichia coli MG1655(EAC)and Bordetella Pertussis(BAC)were expressed in E.coli BL21(DE3)and comparatively analyzed for their activities.As a result,EAC from E.coli MG1655 exhibited a higher activity.However,amount of EAC were obtained in an insoluble form.Therefore,we expressed the first 446 amino acids of EAC(EAC446)to avoid the inclusion body.The effects of induction temperature,incubation time,and incubation p H were further evaluated to improve the expression of EAC446.Subsequently,the reaction process for the production of c AMP with ATP as a starting material was investigated.As none of c AMP was detected in the whole-cell based biocatalytic process,the reaction catalyzed by the crude enzyme was determined for c AMP production.What's more,the reaction temperature,reaction p H,metal ion additives and substrate concentration was optimized,and the maximum c AMP production of 18.45 g·L^-1was achieved with a yield of 95.4%after bioconversion of 6 h. | Chen Ma Jing Wang Xuelin Wang Dandan Mai Yuqi Jin Kequan Chen Xin Wang Pingkai Ouyang | 2020 | Chinese Journal of Chemical Engineering2020，28，8： | 1 |
| 12 | Serum osteocalcin levels in relation to metabolic syndrome in Chinese postmenopausal women显示文摘 | Rong Yang Xiaojing Ma Xiaoping Pan Feifei Wang Yuqi Luo Chengchen Gu Yuqian Bao Weiping Jia | 2013 | Menopause: The Journal of The North American Menopause Society2013，，5： | 1 |
| 13 | A review of the methods used for subjective evaluation of De Qi显示文摘De Qi refers to a series of sensations experienced when acupuncture is performed at acupoints. De Qi comprises needling sensations felt by the patient, and the sensations perceived by the acupuncturist. Classical Traditional Chinese Medicine theory states that De Qi is closely related to curative effect.In modern studies, the main index that researchers have used to evaluate De Qi was the needling sensation reported by the patient. Between 1 st Aug and 31 st Oct 2014, we conducted an electronic database search of all fields in Chinese and English to select literature assessing acupuncture needle sensations. We then reviewed the methods used within these studies to evaluate De Qi. The methods included simple evaluation, and the use of a De Qi scale/questionnaire. The simple evaluation, a qualitative evaluation, was judged by typical sensations felt by the patient after needling at acupoints, such as soreness, numbness, fullness, and heaviness.This method was easy and practicable, and had been adopted widely by Chinese researchers. In contrast, the De Qi scale/questionnaire, a quantitative evaluation, had multiple compiling methods available for evaluating the intensity of De Qi. The standardization and objectification of the De Qi scale/questionnaire effectively improved the quality of studies on De Qi, thereby these scales/questionnaires have been acknowledged and applied by most researchers. The present review analyzed and compared the scales/questionnaires used to evaluate De Qi; furthermore, we provided suggestions for the development and improvement of these questionnaires through integration with classical De Qi theory. | Yuan Hongwen Wang Pei Hu Nijuan Zhang Peng Li Chunhua Liu Yuqi Ma Liangxiao Zhu Jiang | 2018 | Journal of Traditional Chinese Medicine2018，38，2： | 1 |
| 14 | Temperature-response polymer coating for in-tube solid-phase microextraction coupled to high-performance liquid chromatography 显示文摘 | YU Qiongwei MA Qiao FENG Yuqi | 2011 | Talanta2011，84，4： | 1 |
| 15 | SIRT7 orchestrates melanoma progression by simultaneously promoting cell survival and immune evasion via UPR activation显示文摘Melanoma is the most lethal type of skin cancer,originating from the malignant transformation of melanocyte.While the development of targeted therapy and immunotherapy has gained revolutionary advances in potentiating the therapeutic effect,the prognosis of patients with melanoma is still suboptimal.During tumor progression,melanoma frequently encounters stress from both endogenous and exogenous sources in tumor microenvironment.SIRT7 is a nuclear-localized deacetylase of which the activity is highly dependent on intracellular nicotinamide adenine dinucleotide(NAD+),with versatile biological functions in maintaining cell homeostasis.Nevertheless,whether SIRT7 regulates tumor cell biology and tumor immunology in melanoma under stressful tumor microenvironment remains elusive.Herein,we reported that SIRT7 orchestrates melanoma progression by simultaneously promoting tumor cell survival and immune evasion via the activation of unfolded protein response.We first identified that SIRT7 expression was the most significantly increased one in sirtuins family upon stress.Then,we proved that the deficiency of SIRT7 potentiated tumor cell death under stress in vitro and suppressed melanoma growth in vivo.Mechanistically,SIRT7 selectively activated the IRE1α-XBP1 axis to potentiate the pro-survival ERK signal pathway and the secretion of tumorpromoting cytokines.SIRT7 directly de-acetylated SMAD4 to antagonize the TGF-β-SMAD4 signal,which relieved the transcriptional repression on IRE1αand induced the activation of the IRE1α-XBP1 axis.Moreover,SIRT7 up-regulation eradicated anti-tumor immunity by promoting PD-L1 expression via the IRE1α-XBP1 axis.Additionally,the synergized therapeutic effect of SIRT7 suppression and anti-PD-1 immune checkpoint blockade was also investigated.Taken together,SIRT7 can be employed as a promising target to restrain tumor growth and increase the effect of melanoma immunotherapy. | Xiuli Yi Huina Wang Yuqi Yang Hao Wang Hengxiang Zhang Sen Guo Jianru Chen Juan Du Yangzi Tian Jingjing Ma Baolu Zhang Lili Wu Qiong Shi Tianwen Gao Weinan Guo Chunying | 2023 | Signal Transduction and Targeted Therapy2023，8，4： | 1 |
| 16 | Effects of Hydrothermal Treatment on the Major Heavy Metals in Fly Ash from Municipal Solid Waste Incineration显示文摘 | Jin Yuqi Ma Xiaojun Jiang Xuguang | 2013 | Energy Fuels2013，27，1： | 1 |
| 17 | Flexible quasi-solid-state dual-ion asymmetric supercapacitor based on Ni(OH)2 and Nb2O5 nanosheet arrays显示文摘Increasing the energy density, power density as well as widening the operation voltage are essential to electrochemical capacitors to meet the practical energy demands. Herein, a novel flexible quasi-solid-state dual-ion asymmetric supercapacitor(ASC) with Ni(OH)2 and Nb2O5 nanosheets directly grown on stainless steel mesh is developed. In the dual-ion ASC, Nb2O5 negative and Ni(OH)2 positive electrodes react with Li+ and OH- respectively in alkaline gel electrolyte to store energy, which is quite different from conventional alkali metal ion SCs and alkaline SCs. The as-assembled flexible device has an extended working voltage of 1.7 V and delivers a capacity of 5.37 mAh cm-2, a maximum energy density and power density of 0.52 mWh cm-3 and 170 mW cm-3 , respectively. The device maintains around 60% capacity retention after long cycling up to 1000 cycles. Moreover, our device can light up a LED light efficiently upon fast charging. The proposed quasi-solid-state dual-ion ASC has potential applications in future portable electronics and flexible energy storage devices. | Xiaolan Deng Yuqi Jiang Zengxi Wei Minglei Mao Ramyakrishna Pothu Hongxia Wang Caiyun Wang Jinping Liu Jianmin Ma | 2019 | Green Energy & Environment2019，4，4： | 1 |
| 18 | Additional role of serum 25‐hydroxyvitamin D3 levels in atherosclerosis in C hinese middle‐aged and elderly men显示文摘 | Yaping Hao Xiaojing Ma Yuqi Luo Jie Ni Jianxin Dou Jiaan Zhu Yuqian Bao Weiping Jia | 2014 | Clin Exp Pharmacol Physiol2014，，3： | 1 |
| 19 | Effects of runner design and pressurization on the microstructure of a high-pressure die cast Mg-3.0Nd-0.3Zn-0.6Zr alloy显示文摘To clarify the relationship between externally solidified crystals(ESCs)and other defects,e.g.,defect bands and pores,two dimensional(2D)and three dimensional(3D)characterization methods were adopted to analyze castings produced using a modified ingate system equipped with and without an ESC collector.The reduction of ESCs strongly reduced defect band width and shrinkage pore quantity.By reducing the quantity and size of ESCs,net-shrinkage pores were transformed into isolated island-shrinkage pores.We determined via statistical analysis that the mechanical properties of high pressure die castings were strongly related to the size and fraction of the ESCs rather than porosity volume.The reduction of ESCs also caused tensile transgranular fracture modes to transform into intergranular fracture modes.Additionally,casting pressurization strongly reduced pore morphology,volume,and size. | Tongtong Zhang Wenbo Yu Chaosheng Ma Yuqi Zhou Shoumei Xiong | 2022 | International Journal of Minerals,Metallurgy and Materials2022，29，7： | 0 |
| 20 | Aqueous-phase formation of N-containing secondary organic compounds affected by the ionic strength显示文摘The reaction of carbonyl-to-imine/hemiaminal conversion in the atmospheric aqueous phase is a critical pathway to produce the light-absorbing N-containing secondary organic compounds(SOC).The formation mechanism of these compounds has been wildly investigated in bulk solutions with a low ionic strength.However,the ionic strength in the aqueous phase of the polluted atmosphere may be higher.It is still unclear whether and to what extent the inorganic ions can affect the SOC formation.Here we prepared the bulk solution with certain ionic strength,in which glyoxal and ammonium were mixed to mimic the aqueous-phase reaction.Molecular characterization by High-resolution Mass Spectrometry was performed to identify the N-containing products,and the light absorption of the mixtures was measured by ultraviolet-visible spectroscopy.Thirty-nine N-containing compounds were identified and divided into four categories(N-heterocyclic chromophores,high-molecular-weight compounds with N-heterocycle,aliphatic imines/hemiaminals,and the unclassified).It was observed that the longer reaction time and higher ionic strength led to the formation of more N-heterocyclic chromophores and the increasing of the lightabsorbance of the mixture.The added inorganic ions were proposed to make the aqueous phase somewhat viscous so that the molecules were prone to undergo consecutive and intramolecular reactions to form the heterocycles.In general,this study revealed that the enhanced ionic strength and prolonged reaction time had the promotion effect on the lightabsorbing SOC formation.It implies that the aldehyde-derived aqueous-phase SOC would contribute more light-absorbing particulate matter in the industrial or populated area where inorganic ions are abundant. | Yuqi Gan Xiaohui Lu Shaodong Chen Xinghua Jiang Shanye Yang Xiewen Ma Mei Li Fan Yang Yewen Shi Xiaofei Wang | 2024 | Journal of Environmental Sciences2024，，4： | 0 |
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