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Ternary deep eutectic solvents catalyzed D-glucosamine self-condensation to deoxyfructosazine: NMR study

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Green Energy & Environment 2021年第2期6卷 261-270页

作者： Pengfei Liu Christian Marcus Pedersen Jiaojiao zhang Rui Liu zhenzhou zhang Xianglin Hou Yingxiong Wang Shanxi Engineering Research Center of Biorefinery Instiute of Coal ChemistryChinese Academy of Sciences27 South Taoyucn Road Taiyun030001China Center of Materials Science and Optoeletronics Engineering University of Chinese Academy of SciencesBejing100049China Department of Chemistny University of CopenhagenUniversitetsparken 5DK-2100 CopenhagenDenmark School of Chemical Engineering Zhengzhou University Zhengzhou450001China

Ternary deep eutectic solvents(TDESs) comprising choline chloride(Ch Cl), glycerol and L-arginine were synthesized as catalysts and solvents for the conversion of D-glucosamine(GlcNH_(2)) into deoxyfructosazine(DOF). The interactions between these three components in the prepared TDESs were studied by ^(1)H-,^(35)Cl-NMR spectra and ^(1)H diffusion-ordered spectroscopy(DOSY) measurements. The chemical shift changes of active hydrogen in the ^(1)H-NMR spectra of TDES system and widening of signals in the^(35)Cl-NMR spectra confirmed the hydrogen bonding interaction between the components, which was further supported by the decrease of diffusion coefficients(D) of the TDES components according to ^(1)H DOSY measurements. The influences of reaction temperature and L-arginine content in the TDESs on the yield of DOF were also studied. The experimental results have shown that when the molar ratio of Ch Cl, glycerol, and L-arginine was 1:2:0.1, DOF was the major product with a yield of 22.6% at 90℃ for 120 min. The chemical shift titration indicated that the carboxyl group of L-arginine in the TDES is the catalytical active site, so the mechanism of the catalytic reaction between Glc NH_(2) and the TDES was proposed. Moreover, a reaction intermediate, dihydrofructosazine, was identified in the self-condensation reaction of Glc NH_(2) by an in situ ^(1)H NMR technique.

关键词： Ternary deep eutectic solvents Hydrogen bonding NMR D-glucosamine Deoxyfructosazine

High Utility Periodic Frequent Pattern Mining in Multiple Sequences

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Computer Modeling in Engineering & Sciences 2023年第10期137卷 733-759页

作者： Chien-Ming Chen zhenzhou zhang Jimmy Ming-Tai Wu Kuruva Lakshmanna College of Computer Science and Engineering Shandong University of Science and TechnologyQingdao266590China Department of Information Technology Vellore Institute of TechnologyVellore632014India

Periodic patternmining has become a popular research subject in recent years;this approach involves the discoveryof frequently recurring patterns in a transaction sequence. However, previous algorithms for periodic patternmining have ignored the utility (profit, value) of patterns. Additionally, these algorithms only identify periodicpatterns in a single sequence. However, identifying patterns of high utility that are common to a set of sequencesis more valuable. In several fields, identifying high-utility periodic frequent patterns in multiple sequences isimportant. In this study, an efficient algorithm called MHUPFPS was proposed to identify such patterns. To addressexisting problems, three new measures are defined: the utility, high support, and high-utility period sequenceratios. Further, a new upper bound, upSeqRa, and two new pruning properties were proposed. MHUPFPS usesa newly defined HUPFPS-list structure to significantly accelerate the reduction of the search space and improvethe overall performance of the algorithm. Furthermore, the proposed algorithmis evaluated using several *** experimental results indicate that the algorithm is accurate and effective in filtering several non-high-utilityperiodic frequent patterns.

关键词： Decision making frequent periodic pattern multi-sequence database sequential rules utility mining

NMR diffusion analysis of catalytic conversion mixtures from lignocellulose biomass using PSYCHE-iDOSY

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Green Energy & Environment 2023年第5期8卷 1409-1416页

作者： Qi Zhao Christian Marcus Pedersen Jiamin Wang Rui Liu Yuanli zhang Xiuyin Yan zhenzhou zhang Xianglin Hou Yingxiong Wang Shanxi Engineering Research Center of Biorefinery Institute of Coal ChemistryChinese Academy of Sciences27 South Taoyuan RoadTaiyuan030001China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing100049China Department of Chemistry University of CopenhagenUniversitetsparken 5DK-2100CopenhagenDenmark School of Chemical Engineering Zhengzhou University Zhengzhou450001China Shanxi Inspection and Testing Center 106 Changzhi RoadTaiyuan030012China

The component analysis and structure characterization of complex mixtures of biomass conversion remain a challenging ***,developing effective and easy to use techniques is ***-ordered NMR spectroscopy(DOSY)is a non-selective and non-invasive method capable of achieving pseudo-separation and structure assignments of individual compounds from biomass mixtures by providing diffusion coefficients(D)of the ***,the conventional 1H DOSY NMR is limited by crowded resonances when analyzing complex mixtures containing similar chemical structure resulting in similar *** we describe the application of an advanced diffusion NMR method,Pure Shift Yielded by CHirp Excitation DOSY(PSYCHE-iDOSY),which can record high-resolution signal diffusion spectra efficiently separating compounds in model and genuine mixture samples from cellulose,hemicellulose and *** sets of isomers(D-glucose/D-fructose/D-mannose and 1,2-/1,5-pentadiol),homologous compounds(ethylene glycol and 1,2-propylene glycol),model compounds of lignin,and a genuine reaction system(furfuryl alcohol hydrogenolysis with ring opening)were successfully separated in the diffusion *** results show that the ultrahigh-resolution DOSY technique is capable of detecting and pseudo-separating the mixture components of C_(5)/C_(6) sugar conversion products and its derivative hydrogenation/hydrogenolysis from lignocellulose biomass.

关键词： Diffusion NMR Pure shift spectroscopy PSYCHE-iDOSY Mixture analysis Biomass

ACE2/Ang-(1-7) signaling and vascular remodeling

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Science China(Life Sciences) 2014年第8期57卷 802-808页

作者： zhang zhenzhou CHEN LaiJiang ZHONG JiuChang GAO PingJin OUDIT Gavin Y. State Key Laboratory of Medical Genomics Ruijin Hospital Affiliated to Shanghai Jiao Tong University School of Medicine Shanghai Key Laboratory of Hypertension Shanghai Institute of Hypertension Department of Medicine University of Alberta Mazankowski Alberta Heart Institute

The renin-angiotensin system(RAS)regulates vascular tone and plays a critical role in vascular remodeling,which is the result of a complex interplay of alterations in vascular tone and *** of the RAS has led to important pharmacological tools to prevent and treat vascular diseases such as hypertension,diabetic vasculopathy and *** converting enzyme 2(ACE2)was recently identified as a multifunctional monocarboxypeptidase responsible for the conversion of angiotensin(Ang)II to Ang-(1-7).The ACE2/Ang-(1-7)signaling has been shown to prevent cellular proliferation,pathological hypertrophy,oxidative stress and vascular ***,the ACE2/Ang-(1-7)signaling is deemed to be beneficial to the cardiovascular system as a negative regulator of the *** addition of the ACE2/Ang-(1-7)signaling to the complexities of the RAS may lead to the development of novel therapeutics for the treatment of hypertension and other vascular *** present review considers recent findings regarding the ACE2/Ang-(1-7)signaling and focuses on its regulatory roles in processes related to proliferation,inflammation,vascular fibrosis and remodeling,providing proof of principle for the potential use of ACE2 as a novel therapy for vascular disorders related to vascular remodeling.

关键词： angiotensin converting enzyme 2 inflammation vascular remodeling angiotensin II oxidative stress

Multisensor Remote Sensing Imagery Super-Resolution with Conditional GAN

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Journal of Remote Sensing 2021年第1期2021卷 262-272页

作者： Junwei Wang Kun Gao zhenzhou zhang Chong Ni Zibo Hu Dayu Chen Qiong Wu Key Laboratory of Photoelectronic Imaging Technology and System Ministry of EducationBeijing Institute of TechnologyBeijing 100081China Institute of Spacecraft System Engineering CASTBeijing 100094China

Despite the promising performance on benchmark datasets that deep convolutional neural networks have exhibited in single image super-resolution(SISR),there are two underlying limitations to existing ***,current supervised learningbased SISR methods for remote sensing satellite imagery do not use paired real sensor data,instead operating on simulated high-resolution(HR)and low-resolution(LR)image-pairs(typically HR images with their bicubic-degraded LR counterparts),which often yield poor performance on real-world LR ***,SISR is an ill-posed problem,and the super-resolved image from discriminatively trained networks with l p norm loss is an average of the infinite possible HR images,thus,always has low perceptual *** this issue can be mitigated by generative adversarial network(GAN),it is still hard to search in the whole solution-space and find the best *** this paper,we focus on real-world application and introduce a new multisensor dataset for real-world remote sensing satellite imagery *** addition,we propose a novel conditional GAN scheme for SISR task which can further reduce the ***,the super-resolved images have not only high fidelity,but high perceptual quality as *** experiments demonstrate that networks trained on the introduced dataset can obtain better performances than those trained on simulated ***,the proposed conditional GAN scheme can achieve better perceptual quality while obtaining comparable fidelity over the state-of-the-art methods.

关键词： networks image resolution

High efficient catalytic oxidation of 5-hydroxymethylfurfural into 2,5-furandicarboxylic acid under benign conditions with nitrogen-doped graphene encapsulated Cu nanoparticles

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Journal of Energy Chemistry 2020年第11期29卷 96-105页

作者： Chaoxin Yang Xiao Li zhenzhou zhang Bohan Lv Jiachun Li Zhenjian Liu Wanzhen Zhu Furong Tao Guangqiang Lv Yongxing Yang Shandong Provincial Key Laboratory of Molecular Engineering Qilu University of Technology(Shandong Academy of Sciences)Jinan 250353ShandongChina Key Laboratory of Coal Processing and Efficient Utilization Ministry of EducationChina University of Mining and TechnologyXuzhou 221116JiangsuChina Engineering Research Center of Advanced Functional Material Manufacturing of Ministry of Education School of Chemical EngineeringZhengzhou University.Zhengzhou 450001HenanChina School of Chemistry and Chemical Engineering Shanxi UniversityTaiyuan 030006ShanxiChina

Selective oxidation of 5-hydroxymethylfurfual(HMF) to 2,5-furandicarboxylic acid(FDCA) as a bioplastics monomer is efficiently promoted by a simple system without noble-metal and base additives. In this work, graphene oxide(GO) was first synthesised by an electrochemical method with flexible graphite paper(FGP) as start carbon material, then, nitrogen-doped graphene(NG) layers encapsulated Cu nanoparticles(NPs) was prepared by one-step thermal treatment of GO supported Cu2+ in flowing NH3 atmosphere. Compared with NG supported Cu NPs prepared by the traditional impregnation method, enhanced catalytic activity was achieved over Cu/NG and an FDCA yield of 95.2% was achieved under mild reaction conditions with tert-butylhydroperoxide(t-BuOOH) as the oxidant. Control experiments with different catalysts and different addition procedure of t-BuOOH showed the yield of HMF and various intermediates during reaction. From the changing of intermediates concentrations and reaction rates, a reaction pathway through HMF-DFF-FFCA-FDCA was proposed. This work gives a more convenient, more green,more economical and effective method in encapsulated metal NPs preparation and high selectivity in HMF oxidation to FDCA under mild conditions.

关键词： Graphene oxide Encapsulated nanoparticles 5-hydroxymethylfurfual 2,5-furandicarboxylic acid Oxidation Noble-metal free

Targeting the elabela/apelin-apelin receptor axis as a novel therapeutic approach for hypertension

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Chinese Medical Journal 2022年第9期135卷 1019-1026页

作者： Jiawei Song Jianqiong Tang zhenzhou zhang Ying Liu Jiuchang Zhong Heart Center and Beijing Key Laboratory of Hypertension Beijing Chaoyang HospitalCapital Medical UniversityBeijing 100020China Department of Critical Care Medicine Shanghai General HospitalShanghai Jiao Tong University School of MedicineShanghai 201600China Beijing Institute of Respiratory Medicine Beijing 100020China.

Hypertension is the leading risk factor for global mortality and morbidity and those with hypertension are more likely to develop severe symptoms in cardiovascular and cerebrovascular system,which is closely related to abnormal renin-angiotensin system and elabela/apelin-apelin receptor(APJ)*** elabela/apelin-APJ axis exerts essential roles in regulating blood pressure levels,vascular tone,and cardiovascular dysfunction in hypertension by counterbalancing the action of the angiotensin II/angiotensin II type 1 receptor axis and enhancing the endothelial nitric oxide(NO)synthase/NO ***,the elabela/apelin-APJ axis demonstrates beneficial effects in cardiovascular physiology and pathophysiology,including angiogenesis,cellular proliferation,fibrosis,apoptosis,oxidative stress,and cardiovascular remodeling and dysfunction during *** importantly,effects of the elabela/apelin-APJ axis on vascular tone may depend upon blood vessel type or various pathological ***,the broad distribution of elabela/apelin and alternative isoforms implicates its distinct functions in diverse cardiac and vascular cells and tissue ***,both loss-of-function and gain-of-function approaches have defined critical roles of the elabela/apelin-APJ axis in reducing the development and severity of hypertensive ***,targeting the elabela/apelin-APJ axis has emerged as a pre-warning biomarker and a novel therapeutic approach against progression of hypertension,and an increased understanding of cardiovascular actions of the elabela/apelin-APJ axis will help to develop effective interventions for *** this review,we focus on the physiology and biochemistry,diverse actions,and underlying mechanisms of the elabela/apelin-APJ axis,highlighting its role in hypertension and hypertensive cardiovascular injury and dysfunction,with a view to provide a prospective strategy for hypertensive disease therapy.

关键词： Elabela Apelin APJ Hypertension Renin-angiotensin system