Search results for: Heng Li

Items from 1 to 20 out of 1,302 results

article

Biosynthesis of the Non‐Canonical C₁₇ Sesquiterpenoids Chlororaphen A and B from Pseudomonas Chlororaphis

Houchao Xu, Heng Li, Bernd Goldfuss, Gregor Schnakenburg, more

Angewandte Chemie International Edition > 63 > 43 > n/a - n/a

Chlororaphens A and B are structurally unique non‐canonical C₁₇ sesquiterpenoids from Pseudomonas chlororaphis that are made by two SAM‐dependent methyltransferases and a type I terpene synthase. This study addresses the mechanism of their formation in isotopic labelling experiments and DFT calculations. The results demonstrate an astonishing complexity with distribution of labellings within a cyclopentane...

article

Biosynthese der nichtkanonischen C₁₇‐Sesquiterpenoide Chlororaphen A und B aus Pseudomonas chlororaphis

Houchao Xu, Heng Li, Bernd Goldfuss, Gregor Schnakenburg, more

Angewandte Chemie > 136 > 43 > n/a - n/a

Die Chlororaphene A und B sind strukturell einzigartige nichtkanonische C₁₇‐Sesquiterpenoide aus Pseudomonas chlororaphis, die von zwei SAM‐abhängigen Methyltransferasen und einer Typ‐I‐Terpensynthase hergestellt werden. Diese Studie befasst sich in Isotopenmarkierungsexperimenten und DFT‐Berechnungen mit dem Mechanismus ihrer Entstehung. Die Ergebnisse zeigen eine erstaunliche Komplexität der Verteilung...

article

Critical Effects of Insoluble Additives in Liquid Electrolytes for Metal Batteries

Zhu Xu, Kexuan Wang, Heng Li, Huibo Wang, more

Small > 20 > 37 > n/a - n/a

Rechargeable metal batteries have received widespread attention due to their high energy density by using pure metal as the anode. However, there are still many fundamental problems that need to be solved before approaching practical applications. The critical ones are low charge/discharge current due to slow ion transport, short cycle lifetime due to poor anode/cathode stability, and unsatisfied...

article

Deep learning framework with Local Sparse Transformer for construction worker detection in 3D with LiDAR

Mingyu Zhang, Lei Wang, Shuai Han, Shuyuan Wang, more

Computer‐Aided Civil and Infrastructure Engineering > 39 > 19 > 2990 - 3007

Autonomous equipment is playing an increasingly important role in construction tasks. It is essential to equip autonomous equipment with powerful 3D detection capability to avoid accidents and inefficiency. However, there is limited research within the construction field that has extended detection to 3D. To this end, this study develops a light detection and ranging (LiDAR)‐based deep‐learning model...

article

Associations of childhood and adulthood body size, and child‐to‐adult body size change with adult telomere length

Qing Liu, Gaojie Fan, Jianing Bi, Qing Fang, more

Diabetes, Obesity and Metabolism > 26 > 10 > 4622 - 4628

Aim To comprehensively examine the associations of childhood and adulthood body size, and child‐to‐adult body size change with adult leucocyte telomere length (LTL). Methods We included 453 602 participants from the UK Biobank. Childhood body size at the age of 10 years was collected through a questionnaire. Adulthood body size was assessed using body mass index (BMI), waist circumference (WC),...

article

Defective Tungsten Oxides with Stacking Faults for Proton Exchange Membrane Green‐Hydrogen Generation

Ming‐Rong Qu, Yi‐Ran Cheng, Heng‐Li Duan, You‐Yi Qin, more

Small > 20 > 36 > n/a - n/a

Defects can introduce atomic structural modulation and tailor performance of materials. Herein, it demonstrates that semiconductor WO₃ with inert electrocatalytic behavior can be activated through defect‐induced tensile strains. Structural characterizations reveal that when simply treated in Ar/H₂ atmosphere, oxygen vacancies will generate in WO₃ and cause defective structures. Stacking faults are...

article

Photochemical Radical Cascade 6‐endo Cyclization of Dienes with α‐Carbonyl Bromides for the Synthesis of Six‐Membered Benzo‐Fused Lactams

Jia‐Li Sui, Yang Guo, Bi‐Quan Xiong, Ke‐Wen Tang, more

Chinese Journal of Chemistry > 42 > 19 > 2323 - 2328

A novel visible‐light‐induced radical cascade 6‐endo cyclization of dienes (N‐(2‐vinylphenyl)acryl amides) is developed utilizing α‐carbonyl bromides as alkyl reagents. This approach affords an efficient way for synthesizing six‐membered benzo‐fused lactam derivatives with chemo‐ and regio‐selectivity and good functional group tolerance. Primary, secondary, and tertiary bromides are well‐compatible...

article

Ru(II)‐Catalyzed Selective C—H Alkynylation of Isoquinolones, Quinazolones and Phthalazinones with Bromoalkynes

Quan‐Jian Luo, Han‐Chi Wang, Jing Zhang, Jin‐Heng Li, more

Chinese Journal of Chemistry > 42 > 15 > 1686 - 1690

A new, selective Ru(II)‐catalyzed alkynylation reaction of isoquinolones, quinazolones and phthalazinones with readily available bromoalkynes has been developed. This reaction enables the selective construction of a new C(sp²)‐C(sp) bond through C—H activation and C—Br functionalization, and offers an effective and selective route to synthesizing highly valuable alkynylated isoquinolone, quinazolone...

article

Pax‐8: Molecular biology, pathophysiology, and potential pathogenesis

Qinyi Zhou, Heng Li, Yaqiong Cheng, Xiaofeng Ma, more

BioFactors > 50 > 3 > 408 - 421

Transcription factors, as the convergence points of multiple signaling pathways in eukaryotic cells, are closely involved in disease development. Pax‐8, an important transcription factor belonging to the Pax family, exerts a crucial influence on the regulation of gene expression required for both physiological conditions and pathological processes. Pax‐8 contributes to the pathogenesis of many human...

article

Dimerized Acceptors with Conjugate‐Break Linker Enable Highly Efficient and Mechanically Robust Organic Solar Cells

Yafei Ding, Waqar Ali Memon, Di Zhang, Yiwu Zhu, more

Angewandte Chemie > 136 > 22 > n/a - n/a

Designing new acceptors is critical for intrinsically stretchable organic solar cells (IS‐OSCs) with high efficiency and mechanical robustness. However, nearly all stretchable polymer acceptors exhibit limited efficiency and high‐performance small molecular acceptors are very brittle. In this regard, we select thienylene‐alkane‐thienylene (TAT) as the conjugate‐break linker and synthesize four dimerized...

article

Dimerized Acceptors with Conjugate‐Break Linker Enable Highly Efficient and Mechanically Robust Organic Solar Cells

Yafei Ding, Waqar Ali Memon, Di Zhang, Yiwu Zhu, more

Angewandte Chemie International Edition > 63 > 22 > n/a - n/a

article

Ru(II)‐Catalyzed ortho C—H Allylation of N‐Aryl‐7‐azaindoles with 2‐Methylidene Cyclic Carbonate

Jing Zhang, Quan‐Jian Luo, Han‐Chi Wang, Jin‐Heng Li, more

Chinese Journal of Chemistry > 42 > 9 > 985 - 989

A Ru(II)‐catalyzed ortho allylation reaction of N‐aryl‐7‐azaindole with readily available 2‐methylidene cyclic carbonate has been developed. This reaction is an effective pathway for synthesizing 7‐azaindole derivatives with a wide scope of substrates and high yields. In addition, the method can be extended to the allylation of other heterocyclic compounds and several cyclic carbonates, highlighting...

article

Flash Joule‐heating synthesis of MoO₂ nanocatalysts in graphene aerogel for deep catalytic oxidative desulfurization

Dong Xia, Heng Li, Peng Huang, Wenyu Zhou, more

AIChE Journal > 70 > 4 > n/a - n/a

Ultra‐high‐temperature flash Joule‐heating of organometallic precursor‐embedded reduced graphene oxide (rGO) aerogel represents a highly efficient approach for the ultrafast production of nanocatalysts, while such a methodology has been scarcely applied to 3D nanocarbon‐based aerogel monoliths. Herein, we demonstrate the rapid synthesis of MoO₂ nanoparticles within the aerogel matrix via a 1‐s high‐temperature...

article

Propensity score‐incorporated adaptive design approaches when incorporating real‐world data

Nelson Lu, Wei‐Chen Chen, Heng Li, Changhong Song, more

Pharmaceutical Statistics > 23 > 2 > 204 - 218

The propensity score‐integrated composite likelihood (PSCL) method is one method that can be utilized to design and analyze an application when real‐world data (RWD) are leveraged to augment a prospectively designed clinical study. In the PSCL, strata are formed based on propensity scores (PS) such that similar subjects in terms of the baseline covariates from both the current study and RWD sources...

article

Social power and perceived risk of contagious disease: High power leads to lower risk estimation of catching COVID‐19

Heng Li

Risk Analysis > 44 > 3 > 623 - 630

An accurate estimation of COVID‐19 contagion risk is important in terms of understanding the dynamic of disease transmission and health behavior. Previous research has documented that many health‐related variables influence the risk estimation of communicable diseases. We expanded the current understanding by investigating whether health‐irrelevant factors—such as one's sense of power—can have a systematic...

article

Characterization of the novel HLA‐DRB116:76* allele in a Chinese individual

Zhixiang Ren, Pei‐Heng Li, Qing Hao, Heng Xu, more

HLA > 103 > 2 > n/a - n/a

The HLA‐DRB1*16:76 allele differs from HLA‐DRB1*16:02:01 by one nucleotide substitution (A > G) at position 37 in exon 1.

article

Enzymatic Synthesis of Diterpenoids from iso‐GGPP III: A Geranylgeranyl Diphosphate Analog with a Shifted Double Bond

Heng Li, Jeroen S. Dickschat

Chemistry – A European Journal > 30 > 8 > n/a - n/a

The analog of the diterpene precursor geranylgeranyl diphosphate with a double bond shifted from C14=C15 to C15=C16 (named iso‐GGPP III) has been synthesized and enzymatically converted with six bacterial diterpene synthases; this allowed the isolation of nine unnatural diterpenes. For some of the enzyme‐substrate combinations, the different reactivity implemented in the substrate analog iso‐GGPP...

article

Effect of semiconductor materials on anaerobic methanogenesis of terephthalic acid: Promotion and inhibition mechanisms

Dong Xia, Lingfen Ye, Peng Huang, Jinyang Huang, more

AIChE Journal > 70 > 2 > n/a - n/a

The treatment of purified terephthalic acid wastewaters via anaerobic methods poses a significant challenge due to the slow degradation rate and extended reaction time required for the most recalcitrant terephthalic acid (TA). To address this challenge, this study investigated the efficacy of various semiconductors in promoting TA degradation and determined their respective functional roles. Results...

article

Photoreductive Alkylative Dearomatization of N‐Alkyl Pyridin‐1‐ium Salts: Site Selective Access to 4‐Alkyl 1,4‐Dihydropyridines

Chong‐Hui Xu, Liang Zeng, Ming Hu, Jing‐Hao Qin, more

European Journal of Organic Chemistry > 27 > 3 > n/a - n/a

A visible light photoreductive dearomatizative alkylation of N‐alkyl pyridinium salts for producing 4‐alkyl‐1,4‐dihydropyridines is described. The reaction harnesses N‐alkyl pyridinium salts both as the alkyl radical precursors to initiate the reaction and as the 1,4‐dihydropyridin‐4‐yl‐based alkylating reagents to terminate the reaction. In contrast to the reported electroreductive procedure via...

article

Copper(I)‐Catalyzed Asymmetric Allylation of Ketones with 2‐Aza‐1,4‐Dienes

Zhi‐Zhou Pan, Jia‐Heng Li, Hu Tian, Liang Yin

Angewandte Chemie > 136 > 1 > n/a - n/a

Catalytic asymmetric allylation of ketones under proton‐transfer conditions is a challenging issue due to the limited pronucleophiles and the electrophilic inertness of ketones. Herein, a copper(I)‐catalyzed asymmetric allylation of ketones with 2‐aza‐1,4‐dienes (N‐allyl‐1,1‐diphenylmethanimines) is disclosed, which affords a series of functionalized homoallyl tertiary alcohols in high to excellent...

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INFONA - science communication portal

Search results for: Heng Li

Biosynthesis of the Non‐Canonical C₁₇ Sesquiterpenoids Chlororaphen A and B from Pseudomonas Chlororaphis

Biosynthese der nichtkanonischen C₁₇‐Sesquiterpenoide Chlororaphen A und B aus Pseudomonas chlororaphis

Critical Effects of Insoluble Additives in Liquid Electrolytes for Metal Batteries

Deep learning framework with Local Sparse Transformer for construction worker detection in 3D with LiDAR

Associations of childhood and adulthood body size, and child‐to‐adult body size change with adult telomere length

Defective Tungsten Oxides with Stacking Faults for Proton Exchange Membrane Green‐Hydrogen Generation

Photochemical Radical Cascade 6‐endo Cyclization of Dienes with α‐Carbonyl Bromides for the Synthesis of Six‐Membered Benzo‐Fused Lactams

Ru(II)‐Catalyzed Selective C—H Alkynylation of Isoquinolones, Quinazolones and Phthalazinones with Bromoalkynes

Pax‐8: Molecular biology, pathophysiology, and potential pathogenesis

Dimerized Acceptors with Conjugate‐Break Linker Enable Highly Efficient and Mechanically Robust Organic Solar Cells

Dimerized Acceptors with Conjugate‐Break Linker Enable Highly Efficient and Mechanically Robust Organic Solar Cells

Ru(II)‐Catalyzed ortho C—H Allylation of N‐Aryl‐7‐azaindoles with 2‐Methylidene Cyclic Carbonate

Flash Joule‐heating synthesis of MoO₂ nanocatalysts in graphene aerogel for deep catalytic oxidative desulfurization

Propensity score‐incorporated adaptive design approaches when incorporating real‐world data

Social power and perceived risk of contagious disease: High power leads to lower risk estimation of catching COVID‐19

Characterization of the novel HLA‐DRB116:76* allele in a Chinese individual

Enzymatic Synthesis of Diterpenoids from iso‐GGPP III: A Geranylgeranyl Diphosphate Analog with a Shifted Double Bond

Effect of semiconductor materials on anaerobic methanogenesis of terephthalic acid: Promotion and inhibition mechanisms

Photoreductive Alkylative Dearomatization of N‐Alkyl Pyridin‐1‐ium Salts: Site Selective Access to 4‐Alkyl 1,4‐Dihydropyridines

Copper(I)‐Catalyzed Asymmetric Allylation of Ketones with 2‐Aza‐1,4‐Dienes

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