MPEG-1/2-based non-linear editing systems appear to have a tendency to replace the M-JPEG systems, but in so doing it is difficult to realize the video, audio and the synchronization editing algorithms. Such editing a...MPEG-1/2-based non-linear editing systems appear to have a tendency to replace the M-JPEG systems, but in so doing it is difficult to realize the video, audio and the synchronization editing algorithms. Such editing algorithms are presented. Based on an analysis of the structure of the MPEG-1/2 stream, and using parameters of the video, audio and the synchronization information, the video, audio and synchronization editing algorithms are provided. The characters of the algorithms are efficient, the quality loss of frames is low because it only decodes and codes part of the data; the editing algorithm is fast through use of some index files; synchronization editing is realized using the synchronization information, such as PTS, ESCR and other parameters.展开更多
Objectives This study aimed to explore the lagged and cumulative effects of risk factors on disability in older adults using distributed lag non-linear models(DLNMs).Methods We utilized data from the China Health and ...Objectives This study aimed to explore the lagged and cumulative effects of risk factors on disability in older adults using distributed lag non-linear models(DLNMs).Methods We utilized data from the China Health and Retirement Longitudinal Study(CHARLS).After feature selection via Elastic Net Regularization,we applied DLNMs to evaluate the lagged effects of risk factors.Disability was defined as the presence of any difficulties in basic activities of daily living(BADL).The cumulative relative risk(CRR)was calculated by summing the lag-specific risk estimates,representing the cumulative disability risk over the specified lag period.Effect modifications and sensitivity analyses were also performed.Results This study included a total of 2,318 participants.Early-phase lag factors,such as the difficulty in stooping(CRR=3.58;95%CI:2.31-5.55;P<0.001)and walking(CRR=2.77;95%CI:1.39-5.55;P<0.001),exerted the strongest effects immediately upon occurrence.Mid-phase lag factors,such as arthritis(CRR=1.51;95%CI:1.10-2.06;P=0.001),showed a resurgence in disability risk within 2-3 years.Late-phase lag factors,including depressive symptoms(CRR=2.38;95%CI:1.30-4.35;P<0.001)and elevated systolic blood pressure(CRR=1.64;95%CI:1.06-2.79;P=0.02),exhibited significant long-term cumulative risks.Conversely,grip strength(CRR=0.80;95%CI:0.54-0.95;P=0.02)and social participation(CRR=0.89;95%CI:0.73-0.99;P=0.04)were significant protective factors.Conclusions The findings underscore the importance of tailored interventions that account for various lag characteristics of different factors to effectively mitigate disability risk.Future studies should explore the underlying biological and sociological mechanisms of these lagged effects,identify intervention strategies that target risk factors with different lagged patterns,and evaluate their effectiveness.展开更多
The demand for Erigeron breviscapus,a medicinal Compositae plant with cardiovascular therapeutic properties,has been increasing by 15%annually,exceeding production capacity and necessitating improvements in yield and ...The demand for Erigeron breviscapus,a medicinal Compositae plant with cardiovascular therapeutic properties,has been increasing by 15%annually,exceeding production capacity and necessitating improvements in yield and bioactive compound content.Genetic transformation remains essential for functional genomics,yet current Agrobacterium and biolistic methods are inefficient and expensive.In this study,we cloned the full-length sequences of the BABY BOOM,WUSCHEL and GROWTH-REGULATING FACTOR(GRF)genes of E.breviscapus and then transformed them into E.breviscapus explants.The transformation efficiency for the GRF gene reached 45%,and all the transgenic E.breviscapus plants were fertile without obvious developmental defects.Furthermore,we inserted EbGRF4 and Cas9-EbPDS-sgRNA into the same vector for Agrobacterium-mediated transformation to effectively knock out the PDS gene,resulting in albino seedlings,with a gene editing efficiency of 33.3%.These findings provide a solid foundation for functional genomic research and the genetic improvement of E.breviscapus,as well as an important reference for establishing high-efficiency genetic transformation systems for other medicinal plants.展开更多
As we welcome the spring of 2026,we extend our sincere greetings and best wishes to colleagues worldwide in the field of crop science,our partners,and all those committed to sustainable agricultural development!The Ye...As we welcome the spring of 2026,we extend our sincere greetings and best wishes to colleagues worldwide in the field of crop science,our partners,and all those committed to sustainable agricultural development!The Year of the Horse symbolizes endeavor and far-reaching journeys,reflecting our own spirit of continuous exploration and breakthrough innovation on the path of crop science.Here,I extendmysincere appreciation to all our authors and reviewers for their invaluable time,expertise,and dedication,which are instrumental in the success of The Crop Journal,establishing it as a premier platform for the global crop science research community.The Crop Journal publishes its 2026 first issue as a special issue themed“Synthetic Biology for Crop Improvement”,ably vip-edited by four young scientists.The issue provides a comprehensive overview of major advances in the field.In the past few years,crop science has made long strides in metabolic engineering of important pathways in secondary metabolism.The achievements expedite the emergence of synthetic biology as a potent methodology for crop breeding and represent a fundamental paradigm shift from“deciphering crops”to“designing crops”,which is further empowered by artificial intelligence(AI).At this turning point of the New Year,I would like to take this opportunity to provide a brief retrospective and future perspective.展开更多
Rice, a global staple food, is critical for food security. The cultivated Oryza sativa, domesticated from wild O. rufipogon, derives~80%of its 993 identified domestication-related genes from O. rufipogon and 20%from S...Rice, a global staple food, is critical for food security. The cultivated Oryza sativa, domesticated from wild O. rufipogon, derives~80%of its 993 identified domestication-related genes from O. rufipogon and 20%from South/Southeast Asian wild O. nivara(Jing et al., 2023). Genes like An-1, BH4, PROG1,SH4, Rc, Rd, and GS3—which regulate awn length, hull color,til er angle, seed shattering, pericarp color, seed length, and thousand-grain weight, respectively—were selected against during domestication to form modern O. sativa(Yu et al., 2021).However, domestication and yield-focused breeding eliminated wild rice's valuable genes(e.g., for disease resistance, stress tolerance, nutrition), narrowing genetic diversity and impeding efforts to meet growing societal demands.展开更多
Emerging and powerful genome editing tools,particularly CRISPR/Cas9,are facilitating functional genomics research and accelerating crop improvement(Jiang et al.2021;Cao et al.2023;Chen C et al.2023;Liu et al.2023a).Ho...Emerging and powerful genome editing tools,particularly CRISPR/Cas9,are facilitating functional genomics research and accelerating crop improvement(Jiang et al.2021;Cao et al.2023;Chen C et al.2023;Liu et al.2023a).However,the detection and screening of transgenic lines remain major bottlenecks,being time-consuming,labor-intensive,and inefficient during transformation and subsequent mutation identification.A simple and efficient visual marker system plays a critical role in addressing these challenges.Recent studies demonstrated that the GmW1 and RUBY reporter systems were used to obtain visual transgenic soybean(Glycine max) plants(Chen L et al.2023;Chen et al.2024).展开更多
Superconducting diodes,which enable dissipationless supercurrent flow in one direction while blocking it in the reverse direction,are emerging as pivotal components for superconducting electronics.The development of e...Superconducting diodes,which enable dissipationless supercurrent flow in one direction while blocking it in the reverse direction,are emerging as pivotal components for superconducting electronics.The development of editable superconducting diodes could unlock transformative applications,including dynamically reconfigurable quantum circuits that adapt to operational requirements.Here,we report the first observation of the superconducting diode effect(SDE)in LaAlO_(3)/KTaO_(3) heterostructures—a two-dimensional oxide interface superconductor with exceptional tunability.We observe a strong SDE in Hall-bar(or strip-shaped)devices under perpendicular magnetic fields(<15 Oe),with efficiencies above 40%and rectification signals exceeding 10 mV.Through conductive atomic force microscope lithography,we demonstrate reversible nanoscale editing of the SDE’s polarity and efficiency by locally modifying the superconducting channel edges.This approach enables multiple nonvolatile configurations within a single device,realizing an editable superconducting diode.Our work establishes LaAlO_(3)/KTaO_(3) as a platform for vortex-based nonreciprocal transport and provides a pathway toward designer quantum circuits with on-demand functionalities.展开更多
Organic and pharmaceutical synthesis have traditionally relied on the stepwise transformation ofactivated functional groups to synthesize cyclic molecules.The design of valuable heterocyclic compounds,for instance,has...Organic and pharmaceutical synthesis have traditionally relied on the stepwise transformation ofactivated functional groups to synthesize cyclic molecules.The design of valuable heterocyclic compounds,for instance,has depended on multi-step routes such as polar or radical cyclization,cycloadditions,and the manipulation of various functional groups to achieve ring formation or connection[1,2].展开更多
Bacterial blight(BB),caused by Xanthomonas oryzae pathovar oryzae(Xoo),poses a significant threat to rice production,particularly in Asia and West Africa.Breeding resistance against BB in elite rice varieties is cruci...Bacterial blight(BB),caused by Xanthomonas oryzae pathovar oryzae(Xoo),poses a significant threat to rice production,particularly in Asia and West Africa.Breeding resistance against BB in elite rice varieties is crucial to advancing rice breeding program and supporting smallholder farmers.Transcription Activator-Like effectors(TALes)are key virulence factors in Xoo,with some targeting the susceptibility(S)genes such as the sugar transporter SWEET genes in rice.Among these,SWEET14 is an important S gene,with its promoter bound by the TALe TalC which exists across all sequenced African Xoo isolates.In the present study,we utilized CRISPR/Cas9-based cytidine and adenine base editors to alter the effector binding element(EBE)of TalC in the promoter of SWEET14 in rice cultivars Kitaake,IR24,and Zhonghua 11.Mutations with C to T changes in EBE led to reduced SWEET14 induction by TalC-containing Xoo strains,resulting in resistance to African Xoo isolates reliant on TalC for virulence.Conversely,A to G changes retained SWEET14 inducibility and susceptibility to Xoo in edited lines.Importantly,no off-target mutations were detected at predicted sites,and the edited lines exhibited no obvious defects in major agronomic traits in Kitaake.These results underscore the effectiveness of base editing systems for both molecular biology research and crop improvement endeavors.展开更多
“Journal of Jilin University(Science Edition)” is a comprehensive academic journal in the fields of science sponsored by Jilin University and administrated by the Ministry of Education of the People's Republic o...“Journal of Jilin University(Science Edition)” is a comprehensive academic journal in the fields of science sponsored by Jilin University and administrated by the Ministry of Education of the People's Republic of China.The journal started publication in 1955.The original name at starting publication was “Journal of Natural Science of Northeast People University”,which was changed into “Acta Scientiarum Naturalium Universitatis Jilinensis” in 1958owing to the name change of the university.展开更多
On the morning of January 15,the China-Laos Cultural Road Dialogue took place in Vientiane,Laos.A ceremony was held during the event to release the January 2025 special editions of China Report ASEAN(an English journa...On the morning of January 15,the China-Laos Cultural Road Dialogue took place in Vientiane,Laos.A ceremony was held during the event to release the January 2025 special editions of China Report ASEAN(an English journal)and Champa(a Chinese-Lao bilingual journal named after the national flower of Laos which is considered a symbol of sincerity and joy).Part of the 2025“One River,One Family”Spring Festival cultural series in Laos,the event was supervised by China International Communications Group(CICG),the Chinese Embassy in Laos,and China State Railway Group Company,hosted by the Publicity Department of the CPC Yunnan Provincial Committee and the Publicity Department of the Central Committee of the Lao People’s Revolutionary Party(LPRP),and organized by CICG Asia-Pacific,Yunnan Daily,Yunnan International Communication Center for South and Southeast Asia,Pasaxon(“The People”newspaper in Laos),and China Railway Kunming Group.展开更多
The pervasive use of photo editing applications such as Photoshop and FaceTune has significantly altered societal beauty standards, particularly for individuals with skin of color, often leading to unrealistic expecta...The pervasive use of photo editing applications such as Photoshop and FaceTune has significantly altered societal beauty standards, particularly for individuals with skin of color, often leading to unrealistic expectations regarding skin appearance and health. These tools allow users to smooth skin textures, lighten skin tones, and erase imperfections, perpetuating Eurocentric beauty ideals that frequently marginalize the natural diversity of skin tones and textures. Consequently, individuals with skin of color may seek dermatological interventions—such as skin lightening treatments, aggressive acne scar revisions, and other cosmetic procedures—aimed at achieving appearances that align more closely with digitally manipulated images. This pursuit of an unattainable aesthetic can result in increased dissatisfaction with common skin conditions like hyperpigmentation and keloids, which are often misrepresented in edited photos. Additionally, the psychological impact of these alterations can exacerbate feelings of inadequacy, contributing to conditions such as anxiety and body dysmorphic disorder. Dermatologists face the dual challenge of addressing patients’ clinical needs while also managing their expectations shaped by digital enhancements. To combat this, it is essential for dermatologists to integrate patient education that emphasizes the beauty of diverse skin tones and the discrepancies between digital images and authentic skin health. By fostering an understanding of realistic outcomes and promoting the acceptance of natural skin characteristics, dermatologists can empower individuals with skin of color to prioritize authentic skin health over digitally influenced ideals, ultimately leading to more satisfying dermatological care and improved self-image.展开更多
This opinion article discusses the original research work of Yünkül et al.(the Authors)published in the Journal of Mountain Science 21(9):3108–3122.Employing non-linear regression,fuzzy logic and artificial...This opinion article discusses the original research work of Yünkül et al.(the Authors)published in the Journal of Mountain Science 21(9):3108–3122.Employing non-linear regression,fuzzy logic and artificial neural network modeling techniques,the Authors interrogated a large database assembled from the existing research literature to assess the performance of twelve equation rules in predicting the undrained shear strength(s_(u))mobilized for remolded fine-grained soils at different values of liquidity index(I_(L))and water content ratio.Based on their analyses,the Authors proposed a simple and reportedly reliable correlation(i.e.,Eq.9 in their paper)for predicting s_(u) over the I_(L) range of 0.15 to 3.00.This article describes various shortcomings in the Authors’assembled database(including potentially anomalous data and covering an excessively wide I_(L) range in relation to routine geotechnical and transportation engineering applications)and their proposed s_(u)=f(I_(L))correlation.Contrary to the Authors’assertions,their proposed correlation is not reliable for fine-grained soils with consistencies in the general firm to stiff range(i.e.,for 0.15<I_(L)<0.40),increasingly overestimating s_(u) for reducing I_(L),and eventually predicting s_(u)→+∞for I_(L)→0.15+(while producing mathematically undefined s_(u) for I_(L)<0.15),thus rendering their correlation unconservative and potentially leading to unsafe geotechnical designs.Exponential or regular-power type s_(u)=f(I_(L))models are more s_(u)itable when developing correlations that are applicable over the full plastic range(of 0<I_(L)<1),thereby providing reasonably conservative s_(u) predictions for use in the preliminary design for routine geotechnical engineering applications.展开更多
Many experiments have supported the contact models,such as the GW and MB models,but the majority of previous validations have been performed under light loads,resulting in a linear relationship between normal force an...Many experiments have supported the contact models,such as the GW and MB models,but the majority of previous validations have been performed under light loads,resulting in a linear relationship between normal force and contact area.However,the real contact area fraction should never equal one;there must be a limit smaller than the apparent area,implying that the real contact area cannot increase linearly indefinitely.In this paper,the real contact area between two polymethylmethacrylate(PMMA)blocks under heavy load is measured using the total reflection method,and the contact area is analyzed using the image processing method.The results show that the real contact area increases with normal load linearly in light loads but non-linearly in heavy loads;the number of contact spots increases with load linearly in light loads but also non-linearly in heavy loads,synchronous with the change in the real contact area.The GW,MB,and Zhao,Maietta,and Chang(ZMC)models were used to predict the experiment results,but none of them predicted the non-linear stage.A revised GW model based on the bulk deformation hypothesis performs better in predicting the non-linear stage.The study’s findings can be applied to PMMA or other similar materials,and they can serve as a useful reference for future research on the contact mechanisms of other materials.展开更多
Base editors are essential tools for precise genome editing in plants.However,achieving high efficiency in C-to-G editing while minimizing byproduct and offtarget mutations remains challenging.In this study,we present...Base editors are essential tools for precise genome editing in plants.However,achieving high efficiency in C-to-G editing while minimizing byproduct and offtarget mutations remains challenging.In this study,we present the development and evaluation of a novel glycosylase-based cytosine base editor(gCBE)for efficient C-to-G editing in rice.Unlike traditional cytosine base editors,which rely on cytosine deamination,gCBE directly excises cytosine to generate an apurinic/apyrimidinic(AP)site,thus circumventing the deamination step and reducing the production of C-to-T byproducts.We constructed several gCBE variants,including N-gCBE,M-gCBE,and C-gCBE,by fusing engineered human UDG2(UNG*)to SpCas9 nickase(nSpCas9,D10A)and tested their editing efficiency and specificity in rice.Our results demonstrate that M-gCBE achieved efficient C-to-G editing(6.3%to 37.5%)similar to OsCGBE(9.4%to 28.1%)at most targets,though with site-dependent variations.Notably,gCBE tools showed a marked reduction in C-to-T byproducts,with average C-to-T mutation rates of 12.5%for N-gCBE and 16.7%for M-gCBE,compared to 53.1%for OsCGBE.Notably,both N-gCBE and M-gCBE were capable of generating homozygous C-to-G mutations in the T_(0)generation,a key advantage over OsCGBE,which predominantly generated C-to-T mutations.Off-target analysis revealed minimal off-target effects with M-gCBE,highlighting its potential for high-precision genome editing.These findings suggest that gCBE tools,particularly M-gCBE,are highly efficient and precise,providing an advanced solution for C-to-G editing in plants and offering promising applications for crop improvement.展开更多
Incorporating a low density of ester units into the backbone of polyethylene materials enhances their sustainability and recyclability while maintaining the main material properties of polyethylenes.Here we report a n...Incorporating a low density of ester units into the backbone of polyethylene materials enhances their sustainability and recyclability while maintaining the main material properties of polyethylenes.Here we report a new way to access degradable polyethylene materials with a low content of in-chain ester units via mechanochemical backbone editing.Initially,ester groups are incorporated as side groups through catalytic copolymerization of ethylene with a cyclobutene-fused lactone monomer(CBL),yielding polyethylene materials with high molecular weights and adjustable thermomechanical properties.Subsequent solid-state ball-milling treatment selectively introduces side-chain ester groups into the main chain of the polyethylene materials via force-induced cycloreversion of the cyclobutane units.Under acidic conditions,hydrolysis of the resultant polyethylene materials with in-chain ester units facilitates further degradation into oligomers.展开更多
Organisms have evolved a strain limiting mechanism,reflected as a non-linear elastic constitutive,to prevent large deformations from threatening soft tissue integrity.Compared with linear elastic substrates,the wrinkl...Organisms have evolved a strain limiting mechanism,reflected as a non-linear elastic constitutive,to prevent large deformations from threatening soft tissue integrity.Compared with linear elastic substrates,the wrinkle of films on non-linear elastic substrates has received less attention.In this article,a unique wrinkle evolution of the film-substrate system with a J-shaped non-linear stress-strain relation is reported.The result shows that a concave hexagonal array pattern is formed with the shrinkage strain of the film-substrate systems developing.As the interconnection of hexagonal arrays,a unit cell ridge network appears with properties such as chirality and helix.The subparagraph maze pattern formed with high compression is mainly composed of special single-cell ridge networks such as spiral single cores,chiral double cores,and combined multi-cores.This evolutionary model is highly consistent with the results of experiments,and it also predicts wrinkle morphology that has not yet been reported.These findings can serve as a novel explanation for the surface wrinkle of biological soft tissue,as well as provide references for the preparation of artificial biomaterials and programmable soft matter.展开更多
Nonobstructive azoospermia(NOA)affects about 60%of men with azoospermia,representing a severe form of male infertility.The current approach to manage NOA primarily involves testicular sperm retrieval methods such as c...Nonobstructive azoospermia(NOA)affects about 60%of men with azoospermia,representing a severe form of male infertility.The current approach to manage NOA primarily involves testicular sperm retrieval methods such as conventional testicular sperm extraction(c-TESE)and microdissection testicular sperm extraction(micro-TESE).While combining testicular sperm retrieval with intracytoplasmic sperm injection(ICSI)offers hope for patients,the overall sperm retrieval rate(SRR)stands at around 50%.In cases where micro-TESE fails to retrieve sperm,limited options,like donor sperm or adoption,can be problematic in certain cultural contexts.This paper delves into prospective treatments for NOA management.Gene editing technologies,particularly clustered regularly interspaced short palindromic repeats(CRISPR)/CRISPR-associated(Cas)protein 9(CRISPR/Cas9),hold potential for correcting genetic mutations underlying testicular dysfunction.However,these technologies face challenges due to their complexity,potential off-target effects,ethical concerns,and affordability.This calls for research to address key challenges associated with NOA management within the clinical settings.This also necessitate ongoing research essential for developing more sensitive diagnostic tests,validating novel treatments,and customizing current treatment strategies for individual patients.This review concluded that the future of NOA management may entail a combination of these treatment options,tailored to each patient’s unique circumstances,providing a comprehensive approach to address NOA challenges.展开更多
Ectothermic organisms may expand their thermal tolerance by producing multiple protein isoforms with differing thermal sensitivities.While such isoforms commonly originate from allelic variation at a single locus(allo...Ectothermic organisms may expand their thermal tolerance by producing multiple protein isoforms with differing thermal sensitivities.While such isoforms commonly originate from allelic variation at a single locus(allozymes)or from gene duplication that gives rise to paralogs with distinct thermal responses,this study investigated mRNA editing as an alternative,post-transcriptional mechanism for generating mRNA variants.Cytosolic malate dehydrogenase(cMDH)was examined in foot tissue of two congeners of the marine mussel genus Mytilus,which occupy different thermal environments.Multiple editing events were detected within the mRNA coding region in both species.Editing sites were species-specific,with no shared positions identified.In M.coruscus,editing occurred at 117,123,135,190,195,204,279,and 444,while in M.galloprovincialis,editing was detected at 216 and 597.Each species exhibited multiple edited mRNA variants,and these isoforms were associated with differential protein expression.These findings suggest that mRNA editing may contribute an additional layer of molecular variation.The generation of diverse mRNA isoforms from a single DNA coding sequence may enhance enzymatic flexibility across temperature ranges,supporting eurythermal physiological performance and mitigating thermal stress.Moreover,the presence of multiple edited transcripts within individual organisms raises important caveats about the limitations of approaches that deduce amino acid sequences or estimate adaptive variation solely from genomic data.展开更多
纯粹驾驶乐趣始终深植于宝马品牌的基因血脉之中。宝马Z4正是这一理念的完美化身——以敞篷跑车的极致魅力诠释无与伦比的驾驭激情。自2002年初代车型问世以来,这款双座敞篷跑车便凭借独树一帜的设计美学、纯粹至臻的驾驶体验和运动性...纯粹驾驶乐趣始终深植于宝马品牌的基因血脉之中。宝马Z4正是这一理念的完美化身——以敞篷跑车的极致魅力诠释无与伦比的驾驭激情。自2002年初代车型问世以来,这款双座敞篷跑车便凭借独树一帜的设计美学、纯粹至臻的驾驶体验和运动性能的完美平衡,持续征服全球车迷。即将推出的宝马Z4 Final Edition将为爱好者开启限时珍藏通道,提供订购这款特别版车型的专属机遇——它的限量身份和专属或将使它成为车坛的不朽经典。该版本配备了独特的配置元素,在外观和内饰方面均营造出个性化的亮点。同时,Final Edition也象征着这款标志性双座跑车迎来了其巅峰荣耀。宝马Z4的生产将于2026年3月正式结束。展开更多
文摘MPEG-1/2-based non-linear editing systems appear to have a tendency to replace the M-JPEG systems, but in so doing it is difficult to realize the video, audio and the synchronization editing algorithms. Such editing algorithms are presented. Based on an analysis of the structure of the MPEG-1/2 stream, and using parameters of the video, audio and the synchronization information, the video, audio and synchronization editing algorithms are provided. The characters of the algorithms are efficient, the quality loss of frames is low because it only decodes and codes part of the data; the editing algorithm is fast through use of some index files; synchronization editing is realized using the synchronization information, such as PTS, ESCR and other parameters.
基金supported by ScientificResearch Fund of National Health Commission of the People’s Republic of China-Major Science and Technology Program for Medicine and Health in Zhejiang Province(WKJ-ZJ-2406).
文摘Objectives This study aimed to explore the lagged and cumulative effects of risk factors on disability in older adults using distributed lag non-linear models(DLNMs).Methods We utilized data from the China Health and Retirement Longitudinal Study(CHARLS).After feature selection via Elastic Net Regularization,we applied DLNMs to evaluate the lagged effects of risk factors.Disability was defined as the presence of any difficulties in basic activities of daily living(BADL).The cumulative relative risk(CRR)was calculated by summing the lag-specific risk estimates,representing the cumulative disability risk over the specified lag period.Effect modifications and sensitivity analyses were also performed.Results This study included a total of 2,318 participants.Early-phase lag factors,such as the difficulty in stooping(CRR=3.58;95%CI:2.31-5.55;P<0.001)and walking(CRR=2.77;95%CI:1.39-5.55;P<0.001),exerted the strongest effects immediately upon occurrence.Mid-phase lag factors,such as arthritis(CRR=1.51;95%CI:1.10-2.06;P=0.001),showed a resurgence in disability risk within 2-3 years.Late-phase lag factors,including depressive symptoms(CRR=2.38;95%CI:1.30-4.35;P<0.001)and elevated systolic blood pressure(CRR=1.64;95%CI:1.06-2.79;P=0.02),exhibited significant long-term cumulative risks.Conversely,grip strength(CRR=0.80;95%CI:0.54-0.95;P=0.02)and social participation(CRR=0.89;95%CI:0.73-0.99;P=0.04)were significant protective factors.Conclusions The findings underscore the importance of tailored interventions that account for various lag characteristics of different factors to effectively mitigate disability risk.Future studies should explore the underlying biological and sociological mechanisms of these lagged effects,identify intervention strategies that target risk factors with different lagged patterns,and evaluate their effectiveness.
基金supported by the National Natural Science Foundation of China(82160727)the Major Science and Technique Programs in Yunnan Province(202304BT090021-ML05)Yunnan Agricultural University research start-up Fund(KY2022-02).
文摘The demand for Erigeron breviscapus,a medicinal Compositae plant with cardiovascular therapeutic properties,has been increasing by 15%annually,exceeding production capacity and necessitating improvements in yield and bioactive compound content.Genetic transformation remains essential for functional genomics,yet current Agrobacterium and biolistic methods are inefficient and expensive.In this study,we cloned the full-length sequences of the BABY BOOM,WUSCHEL and GROWTH-REGULATING FACTOR(GRF)genes of E.breviscapus and then transformed them into E.breviscapus explants.The transformation efficiency for the GRF gene reached 45%,and all the transgenic E.breviscapus plants were fertile without obvious developmental defects.Furthermore,we inserted EbGRF4 and Cas9-EbPDS-sgRNA into the same vector for Agrobacterium-mediated transformation to effectively knock out the PDS gene,resulting in albino seedlings,with a gene editing efficiency of 33.3%.These findings provide a solid foundation for functional genomic research and the genetic improvement of E.breviscapus,as well as an important reference for establishing high-efficiency genetic transformation systems for other medicinal plants.
文摘As we welcome the spring of 2026,we extend our sincere greetings and best wishes to colleagues worldwide in the field of crop science,our partners,and all those committed to sustainable agricultural development!The Year of the Horse symbolizes endeavor and far-reaching journeys,reflecting our own spirit of continuous exploration and breakthrough innovation on the path of crop science.Here,I extendmysincere appreciation to all our authors and reviewers for their invaluable time,expertise,and dedication,which are instrumental in the success of The Crop Journal,establishing it as a premier platform for the global crop science research community.The Crop Journal publishes its 2026 first issue as a special issue themed“Synthetic Biology for Crop Improvement”,ably vip-edited by four young scientists.The issue provides a comprehensive overview of major advances in the field.In the past few years,crop science has made long strides in metabolic engineering of important pathways in secondary metabolism.The achievements expedite the emergence of synthetic biology as a potent methodology for crop breeding and represent a fundamental paradigm shift from“deciphering crops”to“designing crops”,which is further empowered by artificial intelligence(AI).At this turning point of the New Year,I would like to take this opportunity to provide a brief retrospective and future perspective.
基金supported by the Biological BreedingMajor Projects(2023ZD04076)the National Natural Science Foundation of China(32300312)+2 种基金the Innovation Program of Chinses Academy of Agricultural Sciences(CAAS-CSIAF-202303)the Guangdong Basic and Applied Basic Research Foundation(2020B1515120086)the KeyArea Research and Development Program of Guangdong Province(2021B0707010006)。
文摘Rice, a global staple food, is critical for food security. The cultivated Oryza sativa, domesticated from wild O. rufipogon, derives~80%of its 993 identified domestication-related genes from O. rufipogon and 20%from South/Southeast Asian wild O. nivara(Jing et al., 2023). Genes like An-1, BH4, PROG1,SH4, Rc, Rd, and GS3—which regulate awn length, hull color,til er angle, seed shattering, pericarp color, seed length, and thousand-grain weight, respectively—were selected against during domestication to form modern O. sativa(Yu et al., 2021).However, domestication and yield-focused breeding eliminated wild rice's valuable genes(e.g., for disease resistance, stress tolerance, nutrition), narrowing genetic diversity and impeding efforts to meet growing societal demands.
基金supported by the Jilin Science and Technology Development Program,China (20240602032RC)the Jilin Agricultural Science and Technology Innovation Project,China (CXGC2024ZD001)+1 种基金the Jilin Agricultural Science and Technology Innovation Project,China (CXGC2024ZY012)the Jilin Province Development and Reform Commission-Project for Improving the Independent Innovation Capacity of Major Grain Crops,China (2024C002)。
文摘Emerging and powerful genome editing tools,particularly CRISPR/Cas9,are facilitating functional genomics research and accelerating crop improvement(Jiang et al.2021;Cao et al.2023;Chen C et al.2023;Liu et al.2023a).However,the detection and screening of transgenic lines remain major bottlenecks,being time-consuming,labor-intensive,and inefficient during transformation and subsequent mutation identification.A simple and efficient visual marker system plays a critical role in addressing these challenges.Recent studies demonstrated that the GmW1 and RUBY reporter systems were used to obtain visual transgenic soybean(Glycine max) plants(Chen L et al.2023;Chen et al.2024).
基金supported by the National Key R&D Program of China (Grant No.2023YFA1406400)the National Natural Science Foundation of China (Grant Nos.12534005 and 12325402)。
文摘Superconducting diodes,which enable dissipationless supercurrent flow in one direction while blocking it in the reverse direction,are emerging as pivotal components for superconducting electronics.The development of editable superconducting diodes could unlock transformative applications,including dynamically reconfigurable quantum circuits that adapt to operational requirements.Here,we report the first observation of the superconducting diode effect(SDE)in LaAlO_(3)/KTaO_(3) heterostructures—a two-dimensional oxide interface superconductor with exceptional tunability.We observe a strong SDE in Hall-bar(or strip-shaped)devices under perpendicular magnetic fields(<15 Oe),with efficiencies above 40%and rectification signals exceeding 10 mV.Through conductive atomic force microscope lithography,we demonstrate reversible nanoscale editing of the SDE’s polarity and efficiency by locally modifying the superconducting channel edges.This approach enables multiple nonvolatile configurations within a single device,realizing an editable superconducting diode.Our work establishes LaAlO_(3)/KTaO_(3) as a platform for vortex-based nonreciprocal transport and provides a pathway toward designer quantum circuits with on-demand functionalities.
基金supported by the MSIT(2022R1F1A106268,RS-2023-00213491,RS-2023-00219859,RS-2024-00405261,RS-2024-00409589,RS-2025-25460522,and RS-2025-00642970)Republic of Korea,the InnoCORE program of the Ministry of Science and ICT of Korea(N10250153 and 1.250022.01)the Creative Research Program and KAIST Cross-Generation Collaborative Lab Project.
文摘Organic and pharmaceutical synthesis have traditionally relied on the stepwise transformation ofactivated functional groups to synthesize cyclic molecules.The design of valuable heterocyclic compounds,for instance,has depended on multi-step routes such as polar or radical cyclization,cycloadditions,and the manipulation of various functional groups to achieve ring formation or connection[1,2].
基金supported by a sub-award to the University of Missouri from the Heinrich Heine University of Dusseldorf funded by the Bill&Melinda Gates Foundation(OPP1155704)(Bing Yang)and the China Scholar Council(Chenhao Li,as a joint Ph.D.student).
文摘Bacterial blight(BB),caused by Xanthomonas oryzae pathovar oryzae(Xoo),poses a significant threat to rice production,particularly in Asia and West Africa.Breeding resistance against BB in elite rice varieties is crucial to advancing rice breeding program and supporting smallholder farmers.Transcription Activator-Like effectors(TALes)are key virulence factors in Xoo,with some targeting the susceptibility(S)genes such as the sugar transporter SWEET genes in rice.Among these,SWEET14 is an important S gene,with its promoter bound by the TALe TalC which exists across all sequenced African Xoo isolates.In the present study,we utilized CRISPR/Cas9-based cytidine and adenine base editors to alter the effector binding element(EBE)of TalC in the promoter of SWEET14 in rice cultivars Kitaake,IR24,and Zhonghua 11.Mutations with C to T changes in EBE led to reduced SWEET14 induction by TalC-containing Xoo strains,resulting in resistance to African Xoo isolates reliant on TalC for virulence.Conversely,A to G changes retained SWEET14 inducibility and susceptibility to Xoo in edited lines.Importantly,no off-target mutations were detected at predicted sites,and the edited lines exhibited no obvious defects in major agronomic traits in Kitaake.These results underscore the effectiveness of base editing systems for both molecular biology research and crop improvement endeavors.
文摘“Journal of Jilin University(Science Edition)” is a comprehensive academic journal in the fields of science sponsored by Jilin University and administrated by the Ministry of Education of the People's Republic of China.The journal started publication in 1955.The original name at starting publication was “Journal of Natural Science of Northeast People University”,which was changed into “Acta Scientiarum Naturalium Universitatis Jilinensis” in 1958owing to the name change of the university.
文摘On the morning of January 15,the China-Laos Cultural Road Dialogue took place in Vientiane,Laos.A ceremony was held during the event to release the January 2025 special editions of China Report ASEAN(an English journal)and Champa(a Chinese-Lao bilingual journal named after the national flower of Laos which is considered a symbol of sincerity and joy).Part of the 2025“One River,One Family”Spring Festival cultural series in Laos,the event was supervised by China International Communications Group(CICG),the Chinese Embassy in Laos,and China State Railway Group Company,hosted by the Publicity Department of the CPC Yunnan Provincial Committee and the Publicity Department of the Central Committee of the Lao People’s Revolutionary Party(LPRP),and organized by CICG Asia-Pacific,Yunnan Daily,Yunnan International Communication Center for South and Southeast Asia,Pasaxon(“The People”newspaper in Laos),and China Railway Kunming Group.
文摘The pervasive use of photo editing applications such as Photoshop and FaceTune has significantly altered societal beauty standards, particularly for individuals with skin of color, often leading to unrealistic expectations regarding skin appearance and health. These tools allow users to smooth skin textures, lighten skin tones, and erase imperfections, perpetuating Eurocentric beauty ideals that frequently marginalize the natural diversity of skin tones and textures. Consequently, individuals with skin of color may seek dermatological interventions—such as skin lightening treatments, aggressive acne scar revisions, and other cosmetic procedures—aimed at achieving appearances that align more closely with digitally manipulated images. This pursuit of an unattainable aesthetic can result in increased dissatisfaction with common skin conditions like hyperpigmentation and keloids, which are often misrepresented in edited photos. Additionally, the psychological impact of these alterations can exacerbate feelings of inadequacy, contributing to conditions such as anxiety and body dysmorphic disorder. Dermatologists face the dual challenge of addressing patients’ clinical needs while also managing their expectations shaped by digital enhancements. To combat this, it is essential for dermatologists to integrate patient education that emphasizes the beauty of diverse skin tones and the discrepancies between digital images and authentic skin health. By fostering an understanding of realistic outcomes and promoting the acceptance of natural skin characteristics, dermatologists can empower individuals with skin of color to prioritize authentic skin health over digitally influenced ideals, ultimately leading to more satisfying dermatological care and improved self-image.
文摘This opinion article discusses the original research work of Yünkül et al.(the Authors)published in the Journal of Mountain Science 21(9):3108–3122.Employing non-linear regression,fuzzy logic and artificial neural network modeling techniques,the Authors interrogated a large database assembled from the existing research literature to assess the performance of twelve equation rules in predicting the undrained shear strength(s_(u))mobilized for remolded fine-grained soils at different values of liquidity index(I_(L))and water content ratio.Based on their analyses,the Authors proposed a simple and reportedly reliable correlation(i.e.,Eq.9 in their paper)for predicting s_(u) over the I_(L) range of 0.15 to 3.00.This article describes various shortcomings in the Authors’assembled database(including potentially anomalous data and covering an excessively wide I_(L) range in relation to routine geotechnical and transportation engineering applications)and their proposed s_(u)=f(I_(L))correlation.Contrary to the Authors’assertions,their proposed correlation is not reliable for fine-grained soils with consistencies in the general firm to stiff range(i.e.,for 0.15<I_(L)<0.40),increasingly overestimating s_(u) for reducing I_(L),and eventually predicting s_(u)→+∞for I_(L)→0.15+(while producing mathematically undefined s_(u) for I_(L)<0.15),thus rendering their correlation unconservative and potentially leading to unsafe geotechnical designs.Exponential or regular-power type s_(u)=f(I_(L))models are more s_(u)itable when developing correlations that are applicable over the full plastic range(of 0<I_(L)<1),thereby providing reasonably conservative s_(u) predictions for use in the preliminary design for routine geotechnical engineering applications.
基金Supported by National Natural Science Foundation of China(Grant No.11872033)Beijing Municipal Natural Science Foundation(Grant No.3172017)。
文摘Many experiments have supported the contact models,such as the GW and MB models,but the majority of previous validations have been performed under light loads,resulting in a linear relationship between normal force and contact area.However,the real contact area fraction should never equal one;there must be a limit smaller than the apparent area,implying that the real contact area cannot increase linearly indefinitely.In this paper,the real contact area between two polymethylmethacrylate(PMMA)blocks under heavy load is measured using the total reflection method,and the contact area is analyzed using the image processing method.The results show that the real contact area increases with normal load linearly in light loads but non-linearly in heavy loads;the number of contact spots increases with load linearly in light loads but also non-linearly in heavy loads,synchronous with the change in the real contact area.The GW,MB,and Zhao,Maietta,and Chang(ZMC)models were used to predict the experiment results,but none of them predicted the non-linear stage.A revised GW model based on the bulk deformation hypothesis performs better in predicting the non-linear stage.The study’s findings can be applied to PMMA or other similar materials,and they can serve as a useful reference for future research on the contact mechanisms of other materials.
基金supported by the National Natural Science Foundation of China(82404798)the Natural Science Foundation of Sichuan Province(2024NSFSC1831)+1 种基金the National Key Laboratory for Tropical Crop Breeding(NKLTCB-RC202403,NKLTCBZRJJ4)the Hainan Seed Industrial Laboratory(B22C1000P).
文摘Base editors are essential tools for precise genome editing in plants.However,achieving high efficiency in C-to-G editing while minimizing byproduct and offtarget mutations remains challenging.In this study,we present the development and evaluation of a novel glycosylase-based cytosine base editor(gCBE)for efficient C-to-G editing in rice.Unlike traditional cytosine base editors,which rely on cytosine deamination,gCBE directly excises cytosine to generate an apurinic/apyrimidinic(AP)site,thus circumventing the deamination step and reducing the production of C-to-T byproducts.We constructed several gCBE variants,including N-gCBE,M-gCBE,and C-gCBE,by fusing engineered human UDG2(UNG*)to SpCas9 nickase(nSpCas9,D10A)and tested their editing efficiency and specificity in rice.Our results demonstrate that M-gCBE achieved efficient C-to-G editing(6.3%to 37.5%)similar to OsCGBE(9.4%to 28.1%)at most targets,though with site-dependent variations.Notably,gCBE tools showed a marked reduction in C-to-T byproducts,with average C-to-T mutation rates of 12.5%for N-gCBE and 16.7%for M-gCBE,compared to 53.1%for OsCGBE.Notably,both N-gCBE and M-gCBE were capable of generating homozygous C-to-G mutations in the T_(0)generation,a key advantage over OsCGBE,which predominantly generated C-to-T mutations.Off-target analysis revealed minimal off-target effects with M-gCBE,highlighting its potential for high-precision genome editing.These findings suggest that gCBE tools,particularly M-gCBE,are highly efficient and precise,providing an advanced solution for C-to-G editing in plants and offering promising applications for crop improvement.
基金financially supported by the National Natural Science Foundation of China(No.52473097)the Fundamental Research Funds for the Central Universities(No.24X010301678)Shanghai Jiao Tong University 2030 Initiative(No.WH510363002/002)。
文摘Incorporating a low density of ester units into the backbone of polyethylene materials enhances their sustainability and recyclability while maintaining the main material properties of polyethylenes.Here we report a new way to access degradable polyethylene materials with a low content of in-chain ester units via mechanochemical backbone editing.Initially,ester groups are incorporated as side groups through catalytic copolymerization of ethylene with a cyclobutene-fused lactone monomer(CBL),yielding polyethylene materials with high molecular weights and adjustable thermomechanical properties.Subsequent solid-state ball-milling treatment selectively introduces side-chain ester groups into the main chain of the polyethylene materials via force-induced cycloreversion of the cyclobutane units.Under acidic conditions,hydrolysis of the resultant polyethylene materials with in-chain ester units facilitates further degradation into oligomers.
基金This work was supported by the Youth Project of Hunan Provincial Department of Education(Grant No.22B0334)the Bridge and Tunnel Engineering Innovation Project of Changsha University of Science&Technology(Grant No.11ZDXK11)and the Practical Innovation and Entrepreneurship Capacity Improvement Plan of Changsha University of Science and Technology(Grant No.CLSJCX23029).
文摘Organisms have evolved a strain limiting mechanism,reflected as a non-linear elastic constitutive,to prevent large deformations from threatening soft tissue integrity.Compared with linear elastic substrates,the wrinkle of films on non-linear elastic substrates has received less attention.In this article,a unique wrinkle evolution of the film-substrate system with a J-shaped non-linear stress-strain relation is reported.The result shows that a concave hexagonal array pattern is formed with the shrinkage strain of the film-substrate systems developing.As the interconnection of hexagonal arrays,a unit cell ridge network appears with properties such as chirality and helix.The subparagraph maze pattern formed with high compression is mainly composed of special single-cell ridge networks such as spiral single cores,chiral double cores,and combined multi-cores.This evolutionary model is highly consistent with the results of experiments,and it also predicts wrinkle morphology that has not yet been reported.These findings can serve as a novel explanation for the surface wrinkle of biological soft tissue,as well as provide references for the preparation of artificial biomaterials and programmable soft matter.
文摘Nonobstructive azoospermia(NOA)affects about 60%of men with azoospermia,representing a severe form of male infertility.The current approach to manage NOA primarily involves testicular sperm retrieval methods such as conventional testicular sperm extraction(c-TESE)and microdissection testicular sperm extraction(micro-TESE).While combining testicular sperm retrieval with intracytoplasmic sperm injection(ICSI)offers hope for patients,the overall sperm retrieval rate(SRR)stands at around 50%.In cases where micro-TESE fails to retrieve sperm,limited options,like donor sperm or adoption,can be problematic in certain cultural contexts.This paper delves into prospective treatments for NOA management.Gene editing technologies,particularly clustered regularly interspaced short palindromic repeats(CRISPR)/CRISPR-associated(Cas)protein 9(CRISPR/Cas9),hold potential for correcting genetic mutations underlying testicular dysfunction.However,these technologies face challenges due to their complexity,potential off-target effects,ethical concerns,and affordability.This calls for research to address key challenges associated with NOA management within the clinical settings.This also necessitate ongoing research essential for developing more sensitive diagnostic tests,validating novel treatments,and customizing current treatment strategies for individual patients.This review concluded that the future of NOA management may entail a combination of these treatment options,tailored to each patient’s unique circumstances,providing a comprehensive approach to address NOA challenges.
基金supported by the National Key Research and Development Program of China(2022-24)National Natural Science Foundation of China(42025604,42376102)Fundamental Research Funds for the Central Universities。
文摘Ectothermic organisms may expand their thermal tolerance by producing multiple protein isoforms with differing thermal sensitivities.While such isoforms commonly originate from allelic variation at a single locus(allozymes)or from gene duplication that gives rise to paralogs with distinct thermal responses,this study investigated mRNA editing as an alternative,post-transcriptional mechanism for generating mRNA variants.Cytosolic malate dehydrogenase(cMDH)was examined in foot tissue of two congeners of the marine mussel genus Mytilus,which occupy different thermal environments.Multiple editing events were detected within the mRNA coding region in both species.Editing sites were species-specific,with no shared positions identified.In M.coruscus,editing occurred at 117,123,135,190,195,204,279,and 444,while in M.galloprovincialis,editing was detected at 216 and 597.Each species exhibited multiple edited mRNA variants,and these isoforms were associated with differential protein expression.These findings suggest that mRNA editing may contribute an additional layer of molecular variation.The generation of diverse mRNA isoforms from a single DNA coding sequence may enhance enzymatic flexibility across temperature ranges,supporting eurythermal physiological performance and mitigating thermal stress.Moreover,the presence of multiple edited transcripts within individual organisms raises important caveats about the limitations of approaches that deduce amino acid sequences or estimate adaptive variation solely from genomic data.
文摘纯粹驾驶乐趣始终深植于宝马品牌的基因血脉之中。宝马Z4正是这一理念的完美化身——以敞篷跑车的极致魅力诠释无与伦比的驾驭激情。自2002年初代车型问世以来,这款双座敞篷跑车便凭借独树一帜的设计美学、纯粹至臻的驾驶体验和运动性能的完美平衡,持续征服全球车迷。即将推出的宝马Z4 Final Edition将为爱好者开启限时珍藏通道,提供订购这款特别版车型的专属机遇——它的限量身份和专属或将使它成为车坛的不朽经典。该版本配备了独特的配置元素,在外观和内饰方面均营造出个性化的亮点。同时,Final Edition也象征着这款标志性双座跑车迎来了其巅峰荣耀。宝马Z4的生产将于2026年3月正式结束。
