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Spatiotemporal variation of forest land and its driving factors in the agropastoral ecotone of northern China

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Journal of Arid Land 2022年第1期14卷 1-13页

作者： WANG Shiqing TAO Zefu SUN Piling chen sijia SUN Huiying LI Nan School of Geography and Tourism Qufu Normal UniversityRizhao 276826China Rizhao Key Laboratory of Territory Spatial Planning and Ecological Construction Rizhao 276962China College of Land Science and Technology China Agriculture UniversityBeijing 100193China

As an important natural resource,forest land plays a key role in the maintenance of ecological ***,variations of forest land in the agropastoral ecotone of northern China(AENC)have attracted little *** the AENC as an example and based on remote-sensing images from 2000,2010 to 2020,we explored the spatiotemporal variation of forest land and its driving factors using the land-use transfer matrix,spatial autocorrelation analysis and spatial error *** results showed that from 2000 to 2020,the total area of forest land in the AENC increased from 75,547.52 to 77,359.96 km^(2) and the changes were dominated by the transformations among forest land,grassland and cropland,which occurred mainly in areas with the elevation of 500-2000 m and slope of 15°-25°.There was obvious spatial agglomeration of forest land in the AENC from 2000 to 2020,with hot spots of forest land gathered in the southern marginal areas of the Yanshan Mountains and the low mountainous and hilly areas of the Loess *** sub-hot spots around hot spots moved southward,the sub-cold spots spread to the surrounding areas and the cold spots *** spatiotemporal variation of forest land resulted from the interactions of natural environment,socioeconomic and policy factors from 2000 to *** variables of average annual precipitation,slope,terrain relief,ecological conversion program and afforestation policy for barren mountains affected the spatial pattern of forest land positively,while those of annual average temperature,slope and road network density influenced it negatively.

关键词： forest land spatiotemporal variation driving factors spatial error model agropastoral ecotone northern China

Evaluation and Optimization of Old Magzines Deinking Process of a Modified Lignin Sulfonates Deinking Agent

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Paper And Biomaterials 2019年第1期4卷 31-39页

作者： ShuBin Wu sijia chen YuanYuan Zhao State Key Laboratory of Pulp and Paper Engineering School of Light Industry and EngineeringSouth China University of Technology

Deinking is an important process in waste paper recycling process,and this study mainly focuses on the properties of the deinking agent and process ***-30 prepared in our laboratory,and FS and LD,were the three representative deinking agents studied ***,effective residual ink concentration(ERIC),dirt,macro-stickies,fiber loss during repulping,flotation,and washing processes were measured to evaluate the performance of the deinking agents and optimize process *** of the deinking agents exhibited different advantages:DIA-30 was optimal for deinking efficiency,brightness enhancement,as well as dirt and macrostickies removal,whereas LD was optimal for ink removal during flotation process but performed poorly in terms of brightness *** showed a relatively balanced performance compared to those of DIA-30 and LD in the deinking process,but DIA-30 is the best option for deinking due to its outstanding comprehensive *** optimal repulping conditions for the deinking of 100%old magzines(OMG)using DIA-30 are as follows:repulping temperature,60℃;pulp consistency,13 wt%;repulping time,20 min;H2O2 dosage,0.5 wt%(oven-dried pulp);NaOH dosage,1.2 wt%(oven-dried pulp);Na2SiO3 dosage,0.3 wt%(oven-dried pulp);and optimum DIA-30 dosage,0.1 wt%.

关键词： deinking agent optimization secondary fiber waste paper old magzines

Dynamic patterns of the translatome in a hybrid triplet show translational fractionation of the maize subgenomes

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The Crop Journal 2022年第1期10卷 36-46页

作者： Wanchao Zhu sijia chen Tifu Zhang Jia Qian Zi Luo Han Zhao Yirong Zhang Lin Li National Key Laboratory of Crop Genetic Improvement Huazhong Agricultural UniversityWuhan 430070HubeiChina Jiangsu Provincial Key Laboratory of Agrobiology Institute of Germplasm Resources and BiotechnologyJiangsu Academy of Agricultural SciencesNanjing 210014JiangsuChina Key Laboratory of Crop Heterosis and Utilization(MOE)and State Key Laboratory for Agrobiotechnology Key Laboratory of Crop Genomics and Genetic Improvement(MOA)Beijing Key Laboratory of Crop Genetic ImprovementChina Agricultural UniversityBeijing 100193China

Heterosis,the phenomenon in which hybrids outperform their parents,has been utilized in maize(Zea mays L.)for over 100 *** provide a more complete understanding of heterosis,we collected a comprehensive transcriptome and translatome dataset on seedling leaves for B73,Mo17,and their F1 hybrid,which provided a dynamic landscape of transcriptomic and translatomic variation in *** additivity accounted for a large proportion of variation at two omics-levels,an elevated nonadditive effect was observed in the translatome,especially in the translated subgenome maize1 genes,and the genes that switched from additivity in the transcriptome to nonadditivity in the translatome were significantly enriched in the subgenome *** genes with allele-specific expression and translation show dramatic regulatory switches between the transcriptome and translatome,and partial genes with allele-specific translation underlying regulatory mechanism also exhibited subgenome ***,we found the translated isoforms show different expression patterns compared with transcriptome and more genes changed their dominant isoforms during the genetic flow from parents to the hybrid at the translatome *** translated genes with switched dominant isoforms significantly biased to the subgenome maize2 while genes with conserved dominant isoforms significantly enriched in subgenome ***,the dynamic changed patterns in translatome across hybrid and parental lines show translational fractionation of the maize subgenomes,which may be associated with heterosis in maize and provides a potential theoretical basis for breeding.

关键词： Heterosis Translatome Ribosome-sequencing(Ribo-seq) Subgenomes Maize

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Economy Bounces Back

China Today 2022年第9期71卷 46-48页

作者： chen sijia 不详

Against the backdrop of the COVID-19 pandemic,China has taken various measures to prevent the spread of the virus,stabilize the economy,and promote the resumption of work and *** COVID-19 continues raging in China in 2022,collective effort to improve epidemic control has been *** measures have been taken to prevent new infections,stabilize the economy,and promote the resumption of work and production in an orderly *** Chinese economy has consequently stabilized and bounced back.

关键词： measures collective economy

Large-scale translatome profiling annotates the functional genome and reveals the key role of genic 30 untranslated regions in translatomic variation in plants

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Plant Communications 2021年第4期2卷 38-51页

作者： Wanchao Zhu Jing Xu sijia chen Jian chen Yan Liang Cuijie Zhang Qing Li Jinsheng Lai Lin Li National Key Laboratory of Crop Genetic Improvement Huazhong Agricultural UniversityWuhan 430070China State Key Laboratory of Agrobiotechnology and National Maize Improvement Center Department of Plant Genetics and BreedingChina Agricultural UniversityBeijing100193China Novogene Co. Ltd.Beijing100015China

The translatome,a profile of the translational status of genetic information within cells,provides a new perspective on gene *** many plant genomes have been sequenced,comprehensive translatomic annotations are not available for plants due to a lack of efficient translatome profiling ***,we developed a new technique termed 30 ribosome-profiling sequencing(30Ribo-seq)for reliable,robust translatomic profiling.30Ribo-seq combines polysome profiling and 30 selection with a barcoding and pooling *** translatome profiling of different tissues of Arabidopsis,rice,and maize using conventional ribosome profiling(Ribo-seq)and 30Ribo-seq revealed many novel translational genomic loci,thereby complementing functional genome annotation in *** the low-cost,efficient 30Ribo-seq technique and genome-wide association mapping of translatome expression(eGWAS),we performed a population-level dissection of the translatomes of 159 diverse maize inbred lines and identified 1,777 translational expression quantitative trait loci(eQTLs).Notably,local eQTLs are significantly enriched in the 30 untranslated regions of *** eQTL analysis suggested that sequence variation around the polyadenylation(polyA)signal motif plays a key role in translatomic *** study provides a comprehensive translatome annotation of plant functional genomes and introduces 30Ribo-seq,which paves the way for deep translatomic analysis at the population level.

关键词： translatome Ribo-seq 30Ribo-seq translational eGWAS functional genomics

Pursuing Happy Twilight Years

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China Today 2023年第2期72卷 60-62页

作者： chen sijia 不详

Governments at all levels have been exploring and providing a variety of elderly care services to ensure senior people’s happy *** the development of the economy,the people’s quality of life has *** concept of what life is among the elderly has also been evolving as *** order to meet the diversified and multi-level needs of senior citizens,governments at all levels have been actively optimizing the elderly care system,helping more aged people to enjoy better services.

关键词： has elderly senior

Old Lion Dance Art Awakened

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China Today 2023年第6期72卷 37-40页

作者： chen sijia 不详

From cultural and creative products to performance,animation,and avant-garde technology,the timehonored Guangdong lion dance has always been on the new stage of China *** the sounds of drums and gongs reached their climax,a cute big-headed ornate stylized lion leading 12 others interacted happily with spectators and participants in a lion dance parade in Xiqiao Town,Foshan City,the third largest city in Guangdong *** took out their phones and recorded the joyous moment,and others went up and touched the lion heads to get good *** is a moment when the Nanhai Lion Dance Troupe was celebrating its first birthday.

关键词： Dance Guangdong headed

Cultural Envoy Between China and Spain

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China Today 2023年第7期72卷 64-67页

作者： chen sijia 不详

THE year 2023 marks the 50th anniversary of the establishment of diplomatic relations between China and *** culture as a bridge,the two ancient civilizations have had brilliant people-to-people exchanges over the past five *** González Puy,a Spaniard from Madrid,Spain,has lived in China for more than 40 *** has committed her life to promoting the exchange between Chinese and Spanish cultures and witnessed the development and expansion of exchanges between China and Spain in art exhibitions and dialogues.

关键词： exchanges exhibition culture

“Brilliance of Hebei” Unfolds the “Cultural Gateway to China”

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China Today 2009年第7期58卷 74-75页

作者： chen sijia

THE first program of the "Cultural Gateway to China" opened to the public in the Beijing Capital International Airport last April, with the "Brilliance of Hebei", an exhibition and performance staged at the Beijing Ca... 详细信息

关键词：中国文化北京首都国际机场河北华晨规模生产俱乐部旅客