检索结果-南通市图书馆

Regulation of gene-edited plants in Europe:from the valley of tears into the shining sun?

aBIOTECH 2024年第2期5卷 231-238页

作者： Holger Puchta Department of Molecular Biology Joseph Gottlieb Kolreuter Institute for Plant SciencesKarlsruhe Institute of Technology(KIT)Fritz-Haber-Weg 476131 KarlsruheGermany

Some 20 years ago,the EU introduced complex regulatory rules for the growth of transgenic crops,which resulted in a de facto ban to grow these plants in fields within most European *** the rise of novel genome editing technologies,it has become possible to improve crops genetically in a directed way without the need for incorporation of foreign ***,in 2018,the European Court of Justice ruled that such gene-edited plants are to be regulated like transgenic *** then,European scientists and breeders have challenged this decision and requested a revision of this outdated ***,after 5 years,the European Commission has now published a proposal on how,in the future,to regulate crops produced by new breeding *** proposal tries to find a balance between the different interest groups in *** one side,genetically modified plants,which cannot be discerned from their natural counterparts,will exclusively be used for food and feed and are-besides a registration step-not to be regulated at *** the other side,plants expressing herbicide resistance are to be excluded from this regulation,a concession to the strong environmental associations and NGOs in ***,edited crops are to be excluded from organic farming to protect the business interests of the strong organic sector in ***,if this law passes European parliament and council,unchanged,it will present a big step forward toward establishing a more sustainable European agricultural ***,it might soon be possible to develop and grow crops that are more adapted to global warming and whose cultivation will require lower amounts of ***,there is still a long way to go until the law is *** often,the storm of arguments raised by the opponents,based on irrational fears of mutations and a naive understanding of nature,has fallen on fruitful ground in Europe.

关键词： Genetically modified organism Cisgenesis Gene editing CRISPR/Cas Regulation

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Structural and chemical transformations of CuZn alloy nanoparticles under reactive redox atmospheres:An in situ TEM study

引用

Nano Research 2024年第7期17卷 6265-6273页

作者： Shengnan Yue Qian Li Chaobin Zeng Alexander Klyushin Ramzi Farra Marc-Georg Willinger Xing Huang College of Chemistry Fuzhou UniversityFuzhou 350108China Qingyuan Innovation Laboratory Quanzhou 362801China Hitachi High-Tech Scientific Solutions(Beijing)Co. Ltd.Beijing 100015China max IV Laboratory Lund UniversityBox 11822100 LundSweden Department of Inorganic Chemistry Fritz-Haber Institute of Max Planck SocietyBerlin 14195Germany Department of Chemistry Technical University of MunichGarching 85748Germany

Alloying metals to form intermetallics has been proven effective in tuning the chemical properties of metal-based ***,intermetallic alloys can undergo structural and chemical transformations under reactive conditions,leading to changes in their catalytic *** and understanding these transformations are crucial for establishing relevant structureperformance relationships and for the rational design of alloy-based *** this work,we used CuZn alloy nanoparticles(NPs)as a model material system and employed in situ transmission electron microscopy(TEM)to investigate the structural and chemical changes of CuZn NPs under H_(2),O_(2)and their *** results show how CuZn NPs undergo sequential transformations in the gas mixture at elevated temperatures,starting with gradual leaching and segregation of Zn,followed by oxidation at the NP *** remaining copper at the core of particles can then engage in dynamic behavior,eventually freeing itself from the zinc oxide *** structural dynamics arises from an oscillatory phase transition between Cu and Cu_(2)O and is correlated with the catalytic water formation,as confirmed by in situ mass spectrometry(MS).Under pure H_(2)or O_(2)atmosphere,we observe different structural evolution pathways and final chemical states of CuZn NPs compared to those in the gas *** results clearly demonstrate that the chemical state of alloy NPs can vary considerably under reactive redox atmospheres,particularly for those containing elements with distinct redox properties,necessitating the use of in situ or detailed ex situ characterizations to gain relevant insights into the states of intermetallic alloy-based catalysts and structure-activity relationships.

关键词： In situ transmission electron microscopy(TEM) CuZn alloy structural and chemical transformations redox atmosphere

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Machine-learning driven global optimization of surface adsorbate geometries

引用

npj Computational Materials 2023年第1期9卷 1196-1203页

作者： Hyunwook Jung Lena Sauerland Sina Stocker Karsten Reuter Johannes T.Margraf fritz-haber-Institut der max-planck-gesellschaft Faradayweg 4-6D-14195 BerlinGermany

The adsorption energies of molecular adsorbates on catalyst surfaces are key descriptors in computational catalysis *** the relatively large reaction intermediates frequently encountered,e.g.,in syngas conversion,a multitude of possible binding motifs leads to complex potential energy surfaces(PES),*** implies that finding the optimal structure is a difficult global optimization problem,which leads to significant uncertainty about the stability of many *** tackle this issue,we present a global optimization protocol for surface adsorbate geometries which trains a surrogate machine learning potential *** approach is applicable to arbitrary surface models and adsorbates and minimizes both human intervention and the number of required DFT calculations by iteratively updating the training set with configurations explored by the *** demonstrate the efficiency of this approach for a diverse set of adsorbates on the Rh(111)and(211)surfaces.

关键词： optimization global implies

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Classification and technical target of water electrolysis for hydrogen production

引用

Journal of Energy Chemistry 2024年第8期95卷 554-576,I0012页

作者： Kahyun Ham Sooan Bae Jaeyoung Lee Ertl Center for Electrochemistry and Catalysis Gwangju Institute of Science and Technology(GIST)123 Cheomdangwagi-RoBuk-guGwangju 61005South Korea Department of Heterogeneous Reactions Max Planck Institute for Chemical Energy ConversionStiftstr.34-36Mülheim an der RuhrGermany School of Earth Sciences and Environmental Engineering GIST123 CheomdangwagiroBuk-guGwangju 61005South Korea International Future Research Center of Chemical Energy Storage and Conversion Processes GIST123 CheomdangwagiroBuk-guGwangju 61005South Korea eSuS Co. Ltd.#408S6 BuildingSchool of Environment and Energy EngineeringGIST123 CheomdangwagiroBuk-guGwangju 61005South Korea

Continuous efforts are underway to reduce carbon emissions worldwide in response to global climate *** electrolysis technology,in conjunction with renewable energy,is considered the most feasible hydrogen production technology based on the viable possibility of large-scale hydrogen production and the zero-carbon-emission nature of the ***,for hydrogen produced via water electrolysis systems to be utilized in various fields in practice,the unit cost of hydrogen production must be reduced to$1/kg H_(2).To achieve this unit cost,technical targets for water electrolysis have been suggested regarding components in the *** this paper,the types of water electrolysis systems and the limitations of water electrolysis system components are *** suggest guideline with recent trend for achieving this technical target and insights for the potential utilization of water electrolysis technology.

关键词： Water electrolysis Hydrogen production Technical target Electrochemistry

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Accelerating materials-space exploration for thermal insulators by mapping materials properties via artificial intelligence

引用

npj Computational Materials 2023年第1期9卷 1204-1215页

作者： Thomas A.R.Purcel Matthias Scheffler Luca M.Ghiringhelli Christian Carbogno The NOMAD Laboratory at fritz-haber-Institut der max-planck-gesellschaft and IRIS-Adlershof of the Humboldt-Universität zu Berlin Faradayweg 4-6D-14195 BerlinGermany Physics Department and IRIS Adlershof Humboldt Universität zu Berlin BerlinGermany

Reliable artificial-intelligence models have the potential to accelerate the discovery of materials with optimal properties for various applications,including superconductivity,catalysis,and *** in this field are often hindered by the scarcity and quality of available data and the significant effort required to acquire new *** such applications,reliable surrogate models that help guide materials space exploration using easily accessible materials properties are urgently ***,we present a general,data-driven framework that provides quantitative predictions as well as qualitative rules for steering data creation for all datasets via a combination of symbolic regression and sensitivity *** demonstrate the power of the framework by generating an accurate analytic model for the lattice thermal conductivity using only 75 experimentally measured *** extracting the most influential material properties from this model,we are then able to hierarchically screen 732 materials and find 80 ultra-insulating materials.

关键词： artificial thermal properties

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Reduced formation of peroxide and radical species stabilises iron-based hybrid catalysts in polymer electrolyte membrane fuel cells

引用

Journal of Energy Chemistry 2022年第2期31卷 433-438页

作者： Dongyoon Shin Sabita Bhandari Marc FTesch Shannon ABonke Frédéric Jaouen Sonia Chabbra Christoph Pratsch Alexander Schnegg Anna K.Mechler max planck institute for Chemical Energy Conversion Stiftstr.34–3645470 Mülheim an der RuhrGermany ICGM Univ.MontpellierCNRSENSCMMontpellierFrance fritz haber institute of the max planck Society Department of Inorganic ChemistryFaradayweg 4-614195 BerlinGermany

The incorporation of Pt into an iron-nitrogen-carbon(Fe NC)catalyst for the oxygen reduction reaction(ORR)was recently shown to enhance catalyst stability without Pt directly contributing to the ORR ***,the mechanistic origin of this stabilisation remained *** is established herein with rotating ring disc experiments that the side product,H_(2)O_(2),which is known to damage FeNC catalysts,is suppressed by the presence of *** formation of reactive oxygen species is additionally inhibited,independent of intrinsic H_(2)O_(2) formation,as determined by electron paramagnetic *** electron microscopy identifies an oxidised Fe-rich layer covering the Pt particles,thus explaining the inactivity of the latter towards the *** insights develop understanding of Fe NC degradation mechanisms during ORR catalysis,and crucially establish the required properties of a precious metal free protective catalyst to improve Fe NC stability in acidic media.

关键词： Electrochemistry Fuel cells Oxygen reduction reaction Non-precious metal catalyst Hybrid catalyst Stability

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

High-silica faujasite zeolite-tailored metal encapsulation for the low-temperature production of pentanoic biofuels

引用

Journal of Energy Chemistry 2024年第1期88卷 552-560,I0012页

作者： Wenhao Cui Yuanshuai Liu Pengfei Guo Zhijie Wu Liqun Kang Huawei Geng Shengqi Chu Linying Wang Dong Fan Zhenghao Jia Haifeng Qi Wenhao Luo Peng Tian Zhongmin Liu National Engineering Research Center of Lower-Carbon Catalysis Technology Dalian National Laboratory for Clean EnergyDalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023LiaoningChina University of Chinese Academy of Sciences Beijing 100049China Qingdao institute of Bioenergy and Bioprocess Technology Chinese Academy of SciencesQingdao 266101ShandongChina College of Chemistry and Chemical Engineering Inner Mongolia UniversityHohhot 010021Inner MongoliaChina State Key Laboratory of Heavy Oil Processing and Key Laboratory of Catalysis of CNPC China University of PetroleumBeijing 102249China Department of Inorganic Spectroscopy Max Planck Institute for Chemical Energy ConversionMülheim an der Ruhr 45470Germany Beijing Synchrotron Radiation Facility Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China Division of Energy Research Resources Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023LiaoningChina Leibniz-Institut für Katalyse Albert-Einstein-Straβe 29aRostock 18059Germany

Zeolite-encapsulated metal nanoclusters are at the heart of bifunctional catalysts,which hold great potential for petrochemical conversion and the emerging sustainable ***,efficient encapsulation of metal nanoclusters into a high-silica zeolite Y in particular with good structural integrity still remains a significant ***,we have constructed Ru nanoclusters(~1 nm)encapsulated inside a high-silica zeolite Y(SY)with a SiO_(2)/Al_(2)O_(3) ratio(SAR)of 10 via a cooperative strategy for direct zeolite synthesis and a consecutive impregnation for metal *** with the benchmark Ru/H-USY and other analogues,the as-prepared Ru/H-SY markedly boosts the yields of pentanoic biofuels and stability in the direct hydrodeoxygenation of biomass-derived levulinate even at a mild temperature of 180℃,which are attributed to the notable stabilization of transition states by the enhanced acid accessibility and properly sized constraints of zeolite cavities owing to the good structural integrity.

关键词： High-silica zeolite Y Metal encapsulation Bifunctional catalysis Hydrodeoxygenation Biofuels

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

maximizing the mechanical performance of Ti_(3)AlC_(2)-based max phases with aid of machine learning

引用

Journal of Advanced Ceramics 2022年第8期11卷 1307-1318页

作者： Xingjun DUAN Zhi FANG Tao YANG Chunyu GUO Zhongkang HAN Debalaya SARKER Xinmei HOU Enhui WANG Beijing Advanced Innovation Center for Materials Genome Engineering Collaborative Innovation Center of Steel TechnologyUniversity of Science and Technology BeijingBeijing 100083China fritz-haber-Institut der max-planck-gesellschaft Faradayweg 4-6Berlin 14195Germany UGC-DAE Consortium for Scientific Research University CampusKhandwa RoadIndore 452001India

Mechanical properties consisting of the bulk modulus,shear modulus,Young’s modulus,Poisson’s ratio,etc.,are key factors in determining the practical applications of max *** mechanical properties are mainly dependent on the strength of M–X and M–A *** this study,a novel strategy based on the crystal graph convolution neural network(CGCNN)model has been successfully employed to tune these mechanical properties of Ti_(3)AlC_(2)-based max phases via the A-site substitution(Ti_(3)(Al1-xAx)C_(2)).The structure–property correlation between the A-site substitution and mechanical properties of Ti_(3)(Al1-xAx)C_(2)is *** results show that the thermodynamic stability of Ti_(3)(Al1-xAx)C_(2)is enhanced with substitutions A=Ga,Si,Sn,Ge,Te,As,or *** stiffness of Ti_(3)AlC_(2)increases with the substitution concentration of Si or As increasing,and the higher thermal shock resistance is closely associated with the substitution of Sn or *** addition,the plasticity of Ti_(3)AlC_(2)can be greatly improved when As,Sn,or Ge is used as a *** findings and understandings demonstrated herein can provide universal guidance for the individual synthesis of high-performance max phases for various applications.

关键词： Ti_(3)(Al1−xAx)C_(2) crystal graph convolution neural network(CGCNN)model stability mechanical properties

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Quo vadis carbocatalysis?

引用

Journal of Energy Chemistry 2021年第10期30卷 219-227,I0007页

作者： Robert Schlögl max-planck-Institut für Chemische Energiekonversion Stiftstr.34-3645470 Mülheim an der RuhrGermany fritz-haber Institut der max-planck-gesellschaft Faradayweg 4-614195 BerlinGermany

Prologue The rich scientific heritage of Dangsheng Su contains as substantial fraction his contributions to the field of catalysis with nanostructured carbon *** from microstructural analysis it became quickly clear that the richness of morphological and hence surface electronic variations in this class of materials should be suitable for the development of a science base for heterogeneous catalysis.

关键词： materials. catalysis. catalysis

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Comparison of carotenoid,chlorophyll concentrations and their biosynthetic transcript levels in different coloured cauliflower

引用

Horticultural Plant Journal 2024年第3期10卷 743-754页

作者： Fatemeh Izadpanah Katja Frede Forouzandeh Soltani Susanne Baldermann Food Chemistry and Human Nutrition Leibniz Institute of Vegetable and Ornamental CropsTheodor-Echtermeyer-Weg 114979 GroßbeerenGermany Department of Food Chemistry Institute of Nutritional SciencesUniversity of PotsdamArthur-Scheunert-Allee 114-11614558 NuthetalGermany Department of Horticultural Science University of TehranDaneshkade Ave31587-77871KarajIran Faculty of Life Sciences:Food Nutrition and HealthFood MetabolomeUniversity of BayreuthFritz-Hornschuch-Straße1395326 KulmbachGermany

Carotenoids and chlorophylls are among the most widely distributed pigments in nature that play essential roles in the photosynthetic apparatus and confer diverse colours in *** all vegetables,cauliflower(Brassica oleracea ***)is rich in phytochemicals and is an important crop grown all over the *** study investigates carotenoid and chlorophyll concentrations in differently pigmented cultivars and elucidates the role of transcriptional regulation of carotenoid accumulation including lutein andβ-***,we characterised changes in pigments by UHPLC-DAD-ToF-MS and changes in transcript levels of carotenoid metabolic genes by qRT-PCR in florets and leaves of orange(‘Jaffa'and‘Sunset'),purple(‘Di Sicilia Violetto'and‘Graffiti'),green(‘Trevi')and white(‘Clapton')*** levels of all carotenoid metabolic genes showed different transcript level patterns in the leaves and *** to the other cultivars,the orange cultivars had the highest levels ofβ-carotene in the florets and lutein in the leaves resulting in changes lutein/β-carotene *** the green cultivar,higher transcript levels were also found,especially for phytoene synthase and phytoene desaturase genes of the core biosynthesis ***,no increased carotenoid concentrations were observed,possibly due to a higher carotenoid turnover induced by the carotenoid cleavage dioxygenase 4 in the green *** the white(‘Clapton')and purple(‘Di Sicilia Violetto'and‘Graffiti')cultivars the phytoene desaturase transcript levels as well as carotenoid concentrations were *** concentrations changed in trend comparable to the carotenoid concentrations and were only significantly lower in the leaves of the orange cultivar‘Jaffa'.Also,the chlorophyll a/b ratio changed in‘Jaffa'.In florets the highest chlorophylls concentrations were observed for the green cultivar(‘Trevi')and the purple cultivar(‘Di Sicilia Violetto').Taken together,the study dem

关键词： Brassica oleracea L.var.botrytis Carotenoid Lutein β-Carotene Biosynthesis qRT-PCR

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：