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Rice-wheat comparative genomics:Gains and gaps

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The Crop Journal 2024年第3期12卷 656-669页

作者： Akila Wijerathna-Yapa Ruchi Bishnoi Buddhini Ranawaka Manu Maya Magar Hafeez ur rehman Swati G.Bharad Michal T.Lorenc Vinita Ramtekey Sasha Gohar Charu Lata Md.Harun-Or-Rashid Maryam Razzaq Muhammad sajjad Bhoja *** School of Agriculture and Food Sustainability The University of QueenslandSt LuciaQLD 4072Australia ARC Centre of Excellence for Plant Success in Nature and Agriculture The University of QueenslandSt LuciaQLD 4072Australia Department of Genetics and Plant Breeding College of AgricultureUmmedganj-KotaAgriculture UniversityKotaRajasthan 324001India Centre for Agriculture and the Bioeconomy Queensland University of Technology(QUT)2 George StreetBrisbaneQLD 4000Australia UWA School of Agriculture and Environment The University of Western Australia35 Stirling HighwayCrawleyWA 6009Australia Nepal Agriculture Research Council KhumaltarLalitpurNepal Department of Agronomy University of AgricultureFaisalabad 38040Pakistan Department of Agricultural Botany Dr Panjabrao Deshmukh Krishi VidyapeethAkola 444104MaharashtraIndia ICAR-Indian Institute of Seed Science MauUttar Pradesh 275103India School of Natural Sciences Macquarie UniversityMacquarie ParkNSW 2109Australia ICAR-Indian Institute of Wheat and Barley Research Flowrdale 54642ShimlaIndia International Maize and Wheat Improvement Center(CIMMYT)Bangladesh Office Gulshan-2Dhaka 1212Bangladesh Center for Seed Science University of AgricultureFaisalabad 38000Pakistan Department of Biosciences COMSATS University IslamabadPark RoadTarlai KalanIslamabad 45550Pakistan CGIAR’s Excellence in Breeding(EiB)Platform/Accelerated Breeding Initiative International Maize and Wheat Improvement Center(CIMMYT)El Batán 56237Mexico

Rice and wheat provide nearly 40%of human calorie and protein *** share a common ancestor and belong to the Poaceae(grass)*** their genetic homology is crucial for developing new cultivars with enhanced *** wheat genes and gene families have been characterized based on their rice ***–wheat orthology can identify genetic regions that regulate similar traits in both ***–wheat comparative genomics can identify candidate wheat genes in a genomic region identified by association or QTL mapping,deduce their putative functions and biochemical pathways,and develop molecular markers for marker-assisted breeding.A knowledge of gene homology facilitates the transfer between crops of genes or genomic regions associated with desirable traits by genetic engineering,gene editing,or wide crossing.

关键词： Comparative genomics Orthologs Genes Synteny Genetic engineering Molecular breeding

Ce17Fe78-xB6Mx（M=Cu,Al,Ga;x=0～1.0）快淬合金永磁性能

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稀有金属材料与工程 2019年第11期48卷 3686-3692页

作者：江庆政何伦可 sajjad ur rehman 宋杰欧阳涵钟震晨江西理工大学江西省稀土磁性材料及器件重点实验室

基于熔体快淬技术,研究了低熔点元素Cu、Al和Ga添加对Ce17Fe78B6合金磁性能的影响。结果表明,三类低熔点元素的加入,均降低了合金的磁化强度,而矫顽力有一定程度的提升。其中,Cu和Ga元素添加可优化晶粒尺寸分布,且Ga添加对Ce17Fe78B6合... 详细信息

基于熔体快淬技术,研究了低熔点元素Cu、Al和Ga添加对Ce17Fe78B6合金磁性能的影响。结果表明,三类低熔点元素的加入,均降低了合金的磁化强度,而矫顽力有一定程度的提升。其中,Cu和Ga元素添加可优化晶粒尺寸分布,且Ga添加对Ce17Fe78B6合金矫顽力的提升最为有效。Ce17Fe78B6合金回复曲线轻微开口;当Ga添加量为0.75%(原子分数)时,合金具有较优异的综合磁性能,回复曲线完全闭合。适量Ga元素添加明显增强了Ce-Fe-B基合金晶间短程交换耦合作用,减小了合金平均回复磁导率,有效降低了Ce-Fe-B基合金在周期性反向磁场中的能量损失。

关键词： CeFeB合金磁性能交换耦合作用回复曲线

A Review of Rechargeable Zinc-Air Batteries:Recent Progress and Future Perspectives

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Nano-Micro Letters 2024年第7期16卷 358-401页

作者： Ghazanfar Nazir Adeela rehman Jong-Hoon Lee Choong-Hee Kim Jagadis Gautam Kwang Heo sajjad Hussain Muhammad Ikram Abeer AAlObaid Seul-Yi Lee Soo-Jin Park Department of Nanotechnology and Advanced Materials Engineering Hybrid Materials Research Center(HMC)Sejong UniversitySeoul 05006Republic of Korea Department of Chemical and Biomolecular Engineering Yonsei University50 Yonsei-RoSeodaemun-GuSeoul 03722Republic of Korea Department of Chemistry Inha UniversityIncheon 22212Republic of Korea Solar Cell Applications Research Lab Department of PhysicsGovernment College University LahoreLahore 54000 PunjabPakistan Department of Chemistry College of ScienceKing Saud UniversityP.O.Box 2455Riyadh 11451Saudi Arabia

Zinc-air batteries(ZABs)are gaining attention as an ideal option for various applications requiring high-capacity batteries,such as portable electronics,electric vehicles,and renewable energy *** offer advantages such as low environmental impact,enhanced safety compared to Li-ion batteries,and cost-effectiveness due to the abundance of ***,early research faced challenges due to parasitic reactions at the zinc anode and slow oxygen redox *** advancements in restructuring the anode,utilizing alternative electrolytes,and developing bifunctional oxygen catalysts have significantly improved *** have achieved battery reversibility over thousands of cycles,introduced new electrolytes,and achieved energy efficiency records surpassing 70%.Despite these achievements,there are challenges related to lower power density,shorter lifespan,and air electrode corrosion leading to performance *** review paper discusses different battery configurations,and reaction mechanisms for electrically and mechanically rechargeable ZABs,and proposes remedies to enhance overall battery *** paper also explores recent advancements,applications,and the future prospects of electrically/mechanically rechargeable ZABs.

关键词： Zinc-air batteries Energy storage Affordability Reversibility

Nanocomposite Nd-Fe-B/Alnico alloys with enhanced magnetic properties

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Nanocomposite Nd-Fe-B/Alnico alloys with enhanced magnetic p...

中国稀土学会2020学术年会暨江西(赣州)稀土资源绿色...

作者： sajjad ur rehman Zhenchen Zhong Jiangxi Key Laboratory for Rare Earth Magnetic Materials and Devices

Nd-Fe-B alloys have high intrinsic coercivity, high magnetic energy density, but low Curie temperature and poor temperature stability. While Alnico alloys have high Curie temperature and high temperature stability, but low intrinsic coercivity and low magnetic energy density. It would be of great scientific, technological and economical interest if these two alloys could be combined together in some proportion to make composite magnets with good comprehensive properties. Here we report nanocrystalline composite magnets containing Nd-Fe-B hard phase and alnico semi-hard phase fabricated by melt-spinning technique. A novel core-shell like structure constituting Nd-Fe-B(2:14:1) phase as core and Alnico rich phase as shell was obtained by optimizing the composition and processing conditions. The maximum energy density was enhanced upto 150 kJ/m3 in nanocomposite magnets. The Curie temperature of the main phase increased to 654 K for NdFe-B/Alnico from 581 K for pure Nd-Fe-B alloy, which is attributed to the field penetration of Alnico phase into the hard 2:14:1 phase, in addition to the substitution of Fe by Co and Ni. No kink or dip was observed in the demagnetization curves, which suggested the presence of strong exchange interactions among the phases of the nanocomposite alloys.

关键词： Nd-Fe-B magnets Magnetic properties Nanocrystalline composites

A study on Ce-Fe-B/Alnico nanocrystalline permanent magnets

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A study on Ce-Fe-B/Alnico nanocrystalline permanent magnets

中国稀土学会2021学术年会

作者： sajjad ur rehman Munan Yang Zhong Suwei Zhenchen Zhong Jiangxi University of Science and Technology

Rare earths (RE) based permanent magnets have high intrinsic coercivity,high magnetic energy density,but low working temperature and poor temperature *** Alnico alloys have high working temperature,but low intrinsic coercivity and low magnetic energy *** would be of great scientific,technological and economical interest if RE based alloys and Alnico alloys could be combined together in some proportion to make composite magnets with good comprehensive properties.

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高性能钕铁硼磁体的晶界调控与性能增强机制研究（英文）

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高性能钕铁硼磁体的晶界调控与性能增强机制研究（英文）

中国稀土学会2021学术年会

作者：黄清芳江庆政 sajjad ur rehman 钟震晨江西理工大学福建省稀土功能材料重点实验室

Post-sinter annealing process plays an important role in the microstructures and magnetic properties of the Nd-Fe-B sintered *** this paper,systematically investigated are the magnetic properties and microstructures of the as-sintered and post-sinter annealed Nd-Fe-B magnets with Pr-Fe-Ga boundary *** choice consecutive annealing methods are adopted at high and low temperatures,namely the1 annealing at 880oC for 2 h and the 2 annealing at 880oC for 2 h and then 440oC for 3 *** is exceptional to find out that both the remanence and coercivity are improved after 2 annealing process for this type of *** coercivity is hugely increased from 10.09 kOe for the as-sintered sample to 17.19 kOe for the 2 annealed magnet,with a significant increment of 70.37%in *** extraordinary magnetic properties of Br=14.44 kGs,Hcj=17.19 kOe and (BH)max=51.08 MGOe are obtained for the designated Nd-Fe-B sintered magnets without heavy rare earth (HRE)elements manufactured by dual alloy *** Curie temperature is monotonically decreased from 634 K to 602 K while the c-axis alignment degree is optimized after *** observation and analysis indicate that the elemental distribution patterns are altered after the 2 *** diffusion of the aggregate(Pr,Nd,Cu,Ga)-rich phase from triple junctions into the grain boundary regions is ascribed to the formation of thin and continuous grain boundary layer,which is critical to improve the microstructures and magnetic properties.

关键词： Nd-Fe-B sintered magnets HRE-free Dual alloy method Post-sinter annealing Magnetic properties

Nd-Ce-Fe-B基放电等离子烧结磁体的磁性与微观结构研究

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Nd-Ce-Fe-B基放电等离子烧结磁体的磁性与微观结构研究

稀土元素镧铈钇应用研究研讨会暨广东省稀土产业技术联盟成...

作者：何伦可江庆政 sajjad ur rehman 宋杰钟震晨江西省稀土磁性材料及器件重点实验室/江西理工大学稀土磁性材料及器件研究所

近年来,为降低Nd-Fe-B基磁体的原材料成本,以及实现稀土资源的平衡利用,采用Ce取代Nd有望研制出高性价比的磁体。因此,高丰度稀土永磁材料的开发与研究具有可观的经济和社会效益。我们采用熔体快淬技术制备了纳米晶Nd-Ce-Fe-B基合金条带...

近年来,为降低Nd-Fe-B基磁体的原材料成本,以及实现稀土资源的平衡利用,采用Ce取代Nd有望研制出高性价比的磁体。因此,高丰度稀土永磁材料的开发与研究具有可观的经济和社会效益。我们采用熔体快淬技术制备了纳米晶Nd-Ce-Fe-B基合金条带,并通过0.5 at.%Ga元素优化了合金成分。随后,将优化的合金条带破碎成粉末,再与含Dy稀土合金混合

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纳米晶高丰度稀土永磁合金研究进展

纳米晶高丰度稀土永磁合金研究进展

中国稀土学会2020学术年会暨江西(赣州)稀土资源绿色...

作者：江庆政胡永峰 sajjad ur rehman 钟震晨江西省稀土磁性材料及器件重点实验室&江西理工大学稀土磁性材料及器件研究所 Canadian Light Source University of Saskatchewan

钕铁硼(Nd-Fe-B)磁体的广泛应用促使全球对中低丰度稀土元素钕、镨、镝、铽的需求猛增。然而,以镧(La)、铈(Ce)、钇(Y)为主的高丰度稀土元素在稀土永磁中仍未获得大量应用,造成稀土资源的严重不平衡利用。从原材料成本和国家战略安全角... 详细信息

钕铁硼(Nd-Fe-B)磁体的广泛应用促使全球对中低丰度稀土元素钕、镨、镝、铽的需求猛增。然而,以镧(La)、铈(Ce)、钇(Y)为主的高丰度稀土元素在稀土永磁中仍未获得大量应用,造成稀土资源的严重不平衡利用。从原材料成本和国家战略安全角度考虑,高性价比的高丰度稀土永磁的研究与开发势在必行。不同于Nd-Fe-B,含高丰度稀土的钕铁硼类永磁体在主相热稳定性、第二相种类、各元素的冶金及相析出行为、价态、微观结构等方面均与前者存在较大差异。我们对La、Y元素在永磁合金制备过程中的冶金行为及合金成分与Ce元素价态之间的内在关系进行了相关研究。

关键词：纳米晶高丰度稀土永磁冶金行为 Ce价态

Microstrure, magnetic properties and temperature stability of B added Sm-Co-Hf alloy ribbons

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Microstrure, magnetic properties and temperature stability o...

中国稀土学会2020学术年会暨江西(赣州)稀土资源绿色...

作者： Minglong Zhong Weicheng Xie Li Tao Zhenchen Zhong sajjad ur rehman Institute for Rare Earth Magnetic Materials and Devices Jiangxi University of Science and Technology

SmCoHfB(x = 0, 0.1, 0.2, 0.3, 0.4, 0.5) alloy ribbons were fabricated and high intrinsic coercivity and low temperature coefficient were obtained in SmCo6.8 Hf0.2 B0.4 alloy ribbons. As the amount of B element increased, HfB2 phase appeared in the alloys. The HfB2 phase acted as the pinning phase and improved the intrinsic coercivity of the alloys. The grain boundary pinning enhanced greatly as a result of B doping and the initial susceptibility decreased, and an increased impediment effect is observed during magnetization. SmCoHfB alloy ribbons depicted best magnetic properties: intrinsic coercivity Hcj = 1630 kA/m, remanence Br = 0.52 T, remanence ratio = 0.78. The temperature coefficient of intrinsic coercivity β =-0.15%/°C was obtained in the temperature range(27-400 °C). An intrinsic coercivity of 497 kA/m was obtained at 500 oC which showed the unprecedented temperature stability of these alloys.

关键词： Permanent magnets Magnetic properties Sm-Co alloys Microstructure