LIVIVO - Search results -

Search results

Result 1 - 10 of total 118

Search options

Article ; Online: Understanding the Dynamic Aggregation in Single-Atom Catalysis.

Liu, Laihao / Chen, Tiankai / Chen, Zhongxin

Advanced science (Weinheim, Baden-Wurttemberg, Germany)

2024 Volume 11, Issue 13, Page(s) e2308046

Abstract: The dynamic response of single-atom catalysts to a reactive environment is an increasingly significant topic for understanding the reaction mechanism at the molecular level. In particular, single atoms may experience dynamic aggregation into clusters or ... ...

Abstract	The dynamic response of single-atom catalysts to a reactive environment is an increasingly significant topic for understanding the reaction mechanism at the molecular level. In particular, single atoms may experience dynamic aggregation into clusters or nanoparticles driven by thermodynamic or kinetic factors. Herein, the inherent mechanistic nuances that determine the dynamic profile during the reaction will be uncovered, including the intrinsic stability and site-migration barrier of single atoms, external stimuli (temperature, voltage, and adsorbates), and the influence of catalyst support. Such dynamic aggregation can be beneficial or deleterious on the catalytic performance depending on the optimal initial state. Those examples will be highlighted where in situ formed clusters, rather than single atoms, serve as catalytically active sites for improved catalytic performance. This is followed by the introduction of operando techniques to understand the structural evolution. Finally, the emerging strategies via confinement and defect-engineering to regulate dynamic aggregation will be briefly discussed.
Language	English
Publishing date	2024-01-29
Publishing country	Germany
Document type	Journal Article ; Review
ZDB-ID	2808093-2
ISSN	2198-3844 ; 2198-3844
ISSN (online)	2198-3844
ISSN	2198-3844
DOI	10.1002/advs.202308046
Database	MEDical Literature Analysis and Retrieval System OnLINE

Order via subito

This service is chargeable due to the Delivery terms set by subito. Orders including an article and supplementary material will be classified as separate orders. In these cases, fees will be demanded for each order.

Article ; Online: Emerging Strategies for the Synthesis of Correlated Single Atom Catalysts.

Huang, Yucong / Xiong, Jingjing / Zou, Zhigang / Chen, Zhongxin

Advanced materials (Deerfield Beach, Fla.)

2024 , Page(s) e2312182

Abstract: People have been looking for an energy-efficient and sustainable method to produce future chemicals for decades. Heterogeneous single-atom catalysts (SACs) with atomic dispersion of robust, well-characterized active centers are highly desirable. In ... ...

Abstract	People have been looking for an energy-efficient and sustainable method to produce future chemicals for decades. Heterogeneous single-atom catalysts (SACs) with atomic dispersion of robust, well-characterized active centers are highly desirable. In particular, correlated SACs with cooperative interaction between adjacent single atoms allow the switching of the single-site pathway to the dual or multisite pathway, thus promoting bimolecular or more complex reactions for the synthesis of fine chemicals. Herein, the structural uniqueness of correlated SACs, including the intermetal distance and electronic interaction in homo/heteronuclear metal sites is featured. Recent advances in the production methods of correlated SACs, showcasing the research status and challenges in traditional methods (such as pyrolysis, wet impregnation, and confined synthesis) for building a comprehensive multimetallic SAC library, are summarized. Emerging strategies such as process automation and continuous-flow synthesis are highlighted, minimizing the inconsistency in laboratory batch production and allowing high throughput screening and upscaling toward the next-stage chemical production by correlated SACs.
Language	English
Publishing date	2024-02-09
Publishing country	Germany
Document type	Journal Article ; Review
ZDB-ID	1474949-X
ISSN	1521-4095 ; 0935-9648
ISSN (online)	1521-4095
ISSN	0935-9648
DOI	10.1002/adma.202312182
Database	MEDical Literature Analysis and Retrieval System OnLINE

Full text online

Accessible to users with ZB MED library card

Order via subito

Details ▾
- Full text online
- Order with fees

Article: [The proportion of CD19

Xie, Zhuobei / Dai, Li / He, Haohua / Hong, Dengxiao / Wang, Yuanyuan / Xu, Wenyan / Chen, Zhongxin / Li, Baiqing / Xie, Changhao

Xi bao yu fen zi mian yi xue za zhi = Chinese journal of cellular and molecular immunology

2024 Volume 40, Issue 2, Page(s) 148–157

Abstract: Objective To investigate the expression and clinical significance of PD-1 and its ligand PD-L1 in peripheral blood ... ...

Abstract	Objective To investigate the expression and clinical significance of PD-1 and its ligand PD-L1 in peripheral blood CD19
MeSH term(s)	Humans ; Programmed Cell Death 1 Receptor/metabolism ; B7-H1 Antigen ; B-Lymphocytes, Regulatory/metabolism ; Antigens, CD19/metabolism ; Lupus Erythematosus, Systemic ; Arthritis/metabolism ; Immunoglobulin A/metabolism ; Flow Cytometry ; T-Lymphocytes, Regulatory
Chemical Substances	Programmed Cell Death 1 Receptor ; B7-H1 Antigen ; Antigens, CD19 ; Immunoglobulin A
Language	Chinese
Publishing date	2024-01-27
Publishing country	China
Document type	English Abstract ; Journal Article
ISSN	1007-8738
ISSN	1007-8738
Database	MEDical Literature Analysis and Retrieval System OnLINE

Order via subito

Inter-library loan at ZB MED

Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

Article ; Online: Technical demands for agricultural remote sensing satellites in China

Chen Zhongxin, Hao Pengyu, Liu Jia, An Meng, Han Bo

智慧农业, Vol 1, Iss 1, Pp 32-

2019 Volume 42

Abstract: With the development of China's modern agriculture, information agriculture and smart agriculture, and the implementation of national rural revitalization strategy, there are very strong demands for timely and effective retrieving information for ... ...

Abstract	With the development of China's modern agriculture, information agriculture and smart agriculture, and the implementation of national rural revitalization strategy, there are very strong demands for timely and effective retrieving information for agricultural environment, production conditions, status, and procedure. Because of the inherent characteristics of agriculture, satellite remote sensing is one of the critical techniques in agricultural information acquisition. Based on the analysis of the applications of agricultural remote sensing satellites abroad and in China, the authors analyzed the technical demand and engineering demand of China's remote sensing satellites development according to the demand of modern agricultural development, in order to provide suggestions for the construction agricultural remote sensing satellite system in the national digital agriculture system. In developed economies, remote sensing satellites that can be used for agricultural applications have formed constellations or systems for integrative observation. Their designs of payloads and sensors onboard remote sensing satellites have taken full account of the demand for agricultural applications. Their technical innovation and information retrieval capability have been greatly enhanced in agricultural applications of satellite remote sensing. In contrast with that in the advanced foreign countries, the agricultural satellite remote sensing applications in China have quite a few problems and shortcomings. We rely mainly multi-spectral remote sensing systems, which leads to inadequate observation elements in agricultural remote sensing applications. Limited by the performance of remote sensing sensors and the inadequate ability of remote sensing satellite ground application system, there is a certain gap between quantitative remote sensing monitoring means in China and foreign developed countries. Based on a comprehensive analysis of the current and future demands of agricultural remote sensing applications in China, this paper ...
Keywords	\|agriculture\|satellite\|remote sensing\|smart agriculture\|demands ; Agriculture (General) ; S1-972 ; Technology (General) ; T1-995
Subject code	600
Language	English
Publishing date	2019-02-01T00:00:00Z
Publisher	Editorial Office of Smart Agriculture
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

Full text online

Full text

Inter-library loan at ZB MED

Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

Article ; Online: Single-Atom Catalysis: From Simple Reactions to the Synthesis of Complex Molecules.

Chen, Zhongxin / Liu, Jia / Koh, Ming Joo / Loh, Kian Ping

Advanced materials (Deerfield Beach, Fla.)

2021 Volume 34, Issue 25, Page(s) e2103882

Abstract: To date, the scope of single-atom catalysts (SAC) in liquid-phase transformations is rather limited owing to stability issues and the inability to activate complex substances. This calls for a better design of the catalyst support that can provide a ... ...

Abstract	To date, the scope of single-atom catalysts (SAC) in liquid-phase transformations is rather limited owing to stability issues and the inability to activate complex substances. This calls for a better design of the catalyst support that can provide a dynamic coordination environment needed for catalytic action, and yet retain robustness against leaching or aggregation. In addition, the chemical orthogonality of SAC is useful for designing tandem or multicomponent reactions, in which side reactions common to metal nanoparticles are suppressed. In this review, the intrinsic mechanism will be highlighted that controls reaction efficiency and selectivity in SAC-catalyzed pathways, as well as the structural dynamism of SAC under complex liquid-phase conditions. These mechanistic insights are helpful for the development of next-generation SAC systems for the synthesis of high-value pharmaceuticals through late-stage functionalization, sequential and multicomponent strategies.
MeSH term(s)	Catalysis
Language	English
Publishing date	2021-09-12
Publishing country	Germany
Document type	Journal Article ; Review
ZDB-ID	1474949-X
ISSN	1521-4095 ; 0935-9648
ISSN (online)	1521-4095
ISSN	0935-9648
DOI	10.1002/adma.202103882
Database	MEDical Literature Analysis and Retrieval System OnLINE

Full text online

Accessible to users with ZB MED library card

Order via subito

Details ▾
- Full text online
- Order with fees

Article ; Online: A Broad Light-Harvesting Conjugated Oligoelectrolyte Enables Photocatalytic Nitrogen Fixation in a Bacterial Biohybrid.

Chen, Zhongxin / Quek, Glenn / Zhu, Ji-Yu / Chan, Samuel J W / Cox-Vázquez, Sarah J / Lopez-Garcia, Fernando / Bazan, Guillermo C

Angewandte Chemie (International ed. in English)

2023 Volume 62, Issue 37, Page(s) e202307101

Abstract: We report a rationally designed membrane-intercalating conjugated oligoelectrolyte (COE), namely COE-IC, which endows aerobic ... ...

Abstract	We report a rationally designed membrane-intercalating conjugated oligoelectrolyte (COE), namely COE-IC, which endows aerobic N
MeSH term(s)	Nitrogen Fixation ; Ammonia ; Bacteria ; Azotobacter vinelandii ; Nitrogen
Chemical Substances	Ammonia (7664-41-7) ; Nitrogen (N762921K75)
Language	English
Publishing date	2023-08-07
Publishing country	Germany
Document type	Journal Article ; Research Support, Non-U.S. Gov't ; Research Support, U.S. Gov't, Non-P.H.S.
ZDB-ID	2011836-3
ISSN	1521-3773 ; 1433-7851
ISSN (online)	1521-3773
ISSN	1433-7851
DOI	10.1002/anie.202307101
Database	MEDical Literature Analysis and Retrieval System OnLINE

Full text online

Accessible to users with ZB MED library card

Order via subito

Details ▾
- Full text online
- Order with fees

Article: The spatiotemporal change of cropland and its impact on vegetation dynamics in the farming-pastoral ecotone of northern China

Wuyun, Deji / Sun, Liang / Chen, Zhongxin / Hou, Anhong / Crusiol, Luís Guilherme Teixeira / Yu, Lifeng / Chen, Ruiqing / Sun, Zheng

Science of the total environment. 2022 Jan. 20, v. 805

2022

Abstract: Due to the unfavorable soil conditions and water resources, the cropland use pattern in the farming-pastoral ecotone in northern China is complex. The program named “Grain for Green” has accelerated the cropland change. However, the complex cropland and ... ...

Abstract	Due to the unfavorable soil conditions and water resources, the cropland use pattern in the farming-pastoral ecotone in northern China is complex. The program named “Grain for Green” has accelerated the cropland change. However, the complex cropland and retired cropland are challenging to monitor with remote sensing due to their spatially dispersed and easily confused with spectrally similar land use classes such as nature grasslands and non-cropped fields. Taking farming-pastoral ecotone in the northern foot of the Yinshan Mountains as a case study, we explored a classification approach for complex cropland and retired cropland, which was introduced as a specific land use class by using multi-temporal Landsat TM and OLI images with Google Earth Engine. During 1990–2000, cropland increased with a sharper growth and increased with a slower growth from 2001 to 2010, and then decreased significantly from 2011 to 2019, to lead the cropland area in 2019 was smaller than an area in 1990. We analyzed the spatiotemporal trajectories of retired cropland in 2019 using the Land Use Change Trajectory method to evaluate its source. In our finding, approximately 77% of retired cropland was labelled as cropland before 2019; albeit, not all retired cropland was converted from cropland. Moreover, we qualitatively assessed the vegetation dynamics in the study area by utilizing the long-term NDVI-mean value to reveal that vegetation coverage has shown a continuously increasing trend. It is related to the decline of cropland and the increase of retired cropland at the same rate. Our results highlighted that the “Grain for Green” program had led the vegetation restoration in the farming-pastoral ecotone. Our approach for monitoring cropland and retired cropland can improve the understanding of the driving factors and consequences of these critical land use change trajectories.
Keywords	Internet ; Landsat ; case studies ; cropland ; ecological restoration ; ecotones ; environment ; land use change ; soil ; China
Language	English
Dates of publication	2022-0120
Publishing place	Elsevier B.V.
Document type	Article
ZDB-ID	121506-1
ISSN	1879-1026 ; 0048-9697
ISSN (online)	1879-1026
ISSN	0048-9697
DOI	10.1016/j.scitotenv.2021.150286
Database	NAL-Catalogue (AGRICOLA)

Full text online

Accessible to users with ZB MED library card

In stock of ZB MED Bonn / Germany

Z 74/341: Show issues

Order via subito

Inter-library loan at ZB MED

Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

Details ▾

Book ; Online: A new cropland area database by country circa 2020

Tubiello, Francesco Nicola / Conchedda, Giulia / Casse, Leon / Hao, Pengyu / Santis, Giorgia / Chen, Zhongxin

eISSN: 1866-3516

2023

Abstract: We describe a new dataset of cropland area circa the year 2020, with global coverage, with data for 221 countries and territories and 34 regional aggregates. Data are generated from geospatial information on the agreement-disagreement characteristics of ... ...

Abstract	We describe a new dataset of cropland area circa the year 2020, with global coverage, with data for 221 countries and territories and 34 regional aggregates. Data are generated from geospatial information on the agreement-disagreement characteristics of six open access high-resolution cropland maps derived from remote sensing. The cropland area mapping dataset (CAM) provides information on: i) mean cropland area and its uncertainty; ii) cropland area by six distinct cropland agreement classes; and iii) cropland area by specific combinations of underlying land cover product. The data indicated that world cropland area is 1500 ± 400 million hectares (Mha) (mean and 95 % confidence interval), with a relative uncertainty of 25 % that increased across regions. It was 50 % in Central Asia (40 ± 20 Mha), South America (180 ± 80 Mha), and Southern Europe (40 ± 20 Mha); up to 40 % in Australia and New Zealand (50 ± 20 Mha), South-eastern Asia (80 ± 30 Mha) and Southern Africa (16 ± 6 Mha). Conversely, cropland area was estimated with better precision, i.e. smaller uncertainties in the range 10 %–25 % in Southern Asia (230 ± 30 Mha), Northern America (200 ± 40 Mha), Northern Africa (40 ± 10 Mha), Eastern and Western Europe (40 ± 10 Mha). The new data can be used to investigate coherence of information across the six underlying products, as well as to investigate important disagreement features. Overall, 70 % or more of the estimated mean cropland area globally and by region corresponded to good agreement of underlying land cover maps–four or more. Conversely, in Africa cropland area estimates found significant disagreement, highlighting mapping difficulties in complex landscapes. Finally, the new cropland area data were consistent with FAOSTAT in 15 out of 18 world regions, and for 114 out of 182 countries with a cropland area above 10 kha. By helping to highlight features of cropland characteristics and underlying causes for agreement/disagreement across land cover products, the CAM dataset can be used as a tool to ...
Subject code	910 ; 550
Language	English
Publishing date	2023-06-16
Publishing country	de
Document type	Book ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

Full text online

Full text

Inter-library loan at ZB MED

Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

Article: Regional winter wheat yield estimation based on the WOFOST model and a novel VW-4DEnSRF assimilation algorithm

Wu, Shangrong / Yang, Peng / Ren, Jianqiang / Chen, Zhongxin / Li, He

Remote sensing of environment. 2021 Mar. 15, v. 255

2021

Abstract: To further improve the accuracy of regional crop yield estimation based on data assimilation, a novel EnSRF assimilation algorithm based on a variable time window and four-dimensional extension (VW-4DEnSRF) was proposed. In this research, taking Hengshui ...

Abstract	To further improve the accuracy of regional crop yield estimation based on data assimilation, a novel EnSRF assimilation algorithm based on a variable time window and four-dimensional extension (VW-4DEnSRF) was proposed. In this research, taking Hengshui City of Hebei Province as the study area and winter wheat as the research crop, based on the WOFOST crop model and the proposed VW-4DEnSRF algorithm, a crop yield assimilation system was successfully constructed after parameter sensitivity analysis and parameter calibration of the crop model. Supported by the field-measured crop yield data and based on the effective validation of the yield assimilation system at a single point scale and in a typical experimental area, the scale optimization of grid size for regional yield estimation was effectively selected. Finally, combining the WOFOST model and inverted remotely sensed LAI, the regional winter wheat yield simulation under the optimal grid size of 500 m was carried out effectively through comparison with the field-measured yield data and official statistical yield data at the county level. Among them, the R², adjusted R² and RMSE between the simulated yield and ground-measured yield were 0.481, 0.471 and 801.4 kg.ha⁻¹, respectively. The mean value of the estimated yield of winter wheat in Hengshui City was 6787 kg.ha⁻¹, and the RMSE and RE between the estimated yield and official yield were 416.7 kg.ha⁻¹ and 4.56%, respectively. These above results showed that the crop yield assimilation system based on the WOFOST model and proposed VW-4DEnSRF algorithm had good performances at both the single-point level and regional level, which proved that the proposed algorithm was feasible and effective at simulating crop yield over a large area
Keywords	algorithms ; crop models ; environment ; winter wheat ; China
Language	English
Dates of publication	2021-0315
Publishing place	Elsevier Inc.
Document type	Article
Note	NAL-AP-2-clean
ZDB-ID	431483-9
ISSN	0034-4257
ISSN	0034-4257
DOI	10.1016/j.rse.2020.112276
Database	NAL-Catalogue (AGRICOLA)

Full text online

Accessible to users with ZB MED library card

In stock of ZB MED Bonn / Germany

984/1289: Show issues
Z 2005/734: Show issues

Order via subito

Inter-library loan at ZB MED

Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

Details ▾

Article ; Online: Aggregation-Induced Radical of Donor-Acceptor Organic Semiconductors.

Chen, Zhongxin / Li, Wenqiang / Zhang, Yiheng / Wang, Zejun / Zhu, Weiya / Zeng, Miao / Li, Yuan

The journal of physical chemistry letters

2021 Volume 12, Issue 40, Page(s) 9783–9790

Abstract: Narrow bandgap donor-acceptor organic semiconductors are generally considered to show a closed-shell singlet ground state, and their radicals are reported as impurities, defects, polarons, and charge transfer monoradicals. Herein, we systematically ... ...

Abstract	Narrow bandgap donor-acceptor organic semiconductors are generally considered to show a closed-shell singlet ground state, and their radicals are reported as impurities, defects, polarons, and charge transfer monoradicals. Herein, we systematically investigated the open-shell singlet diradical electronic ground state of two diketopyrrolopyrrole-based compounds via the combination of electron spin resonance (ESR), nuclear magnetic resonance, superconducting quantum interference device magnetometry, and theoretical calculations. It is widely known that the quinoidal character will be significantly enhanced in the aggregation state accompanied by improved planarity and enhanced delocalization. We proposed an aggregation-induced radical and captodative effect as the driving force for the formation and stabilization of the open-shell quinoid diradical based on the ESR test in different proportions of mixed solvents. Our results provided a novel view for understanding the intrinsic chemical structure of donor-acceptor organic semiconductors, the open-shell singlet and thermally excited triplet electronic states, and the unexpected physical processes between the ground state and the excited state.
Language	English
Publishing date	2021-10-01
Publishing country	United States
Document type	Journal Article
ISSN	1948-7185
ISSN (online)	1948-7185
DOI	10.1021/acs.jpclett.1c02463
Database	MEDical Literature Analysis and Retrieval System OnLINE

Order via subito

Inter-library loan at ZB MED

Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

To top

More links

Kategorien

Order via subito

Full text online

More links

Kategorien

Order via subito

More links

Kategorien

Order via subito

Inter-library loan at ZB MED

Full text online

More links

Kategorien

Inter-library loan at ZB MED

Full text online

More links

Kategorien

Order via subito

Full text online

More links

Kategorien

Order via subito

Full text online

More links

Kategorien

In stock of ZB MED Bonn / Germany

Order via subito

Inter-library loan at ZB MED

Full text online

More links

Kategorien

Inter-library loan at ZB MED

Full text online

More links

Kategorien

In stock of ZB MED Bonn / Germany

Order via subito

Inter-library loan at ZB MED

More links

Kategorien

Order via subito

Inter-library loan at ZB MED