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| 1 | δ^(15)N-stable isotope analysis of NH_(x): An overview on analytical measurements, source sampling and its source apportionment显示文摘Agricultural sources and non-agricultural emissions contribute to gaseous ammonia(NH_(3))that plays a vital role in severe haze formation.Qualitative and quantitative contributions of these sources to ambient PM_(2.5)(particulate matter with an aerodynamic equivalent diameter below 2.5µm)concentrations remains uncertain.Stable nitrogen isotopic composition(δ^(15)N)of NH_(3)and NH_(4)+(δ^(15)N(NH_(3))andδ^(15)N(NH_(4)+),respectively)can yield valuable information about its sources and associated processes.This review provides an overview of the recent progress in analytical techniques forδ^(15)N(NH_(3))andδ^(15)N(NH_(4)+)measurement,sampling of atmospheric NH_(3)and NH_(4)+in the ambient air and their sources signature(e.g.,agricultural vs.fossil fuel),and isotope-based source apportionment of NH_(3)in urban atmosphere.This study highlights that collecting sample that are fully representative of emission sources remains a challenge in fingerprintingδ^(15)N(NH_(3))values of NH_(3)emission sources.Furthermore,isotopic fractionation during NH_(3)gas-to-particle conversion under varying ambient field conditions(e.g.,relative humidity,particle pH,temperature)remains unclear,which indicates more field and laboratory studies to validate theoretically predicted isotopic fractionation are required.Thus,this study concludes that lack of refinedδ^(15)N(NH_(3))fingerprints and full understanding of isotopic fractionation during aerosol formation in a laboratory and field conditions is a limitation for isotope-based source apportionment of NH_(3).More experimental work(in chamber studies)and theoretical estimations in combinations of field verification are necessary in characterizing isotopic fractionation under various environmental and atmospheric neutralization conditions,which would help to better interpret isotopic data and our understanding on NH_(x)(NH_(3)+NH_(4)+)dynamics in the atmosphere. | Noshan Bhattarai Shuxiao Wang Yuepeng Pan Qingcheng Xu Yanlin Zhang Yunhua Chang Yunting Fang | 2021 | Frontiers of Environmental Science & Engineering2021，15，6： | 3 |
| 2 | Study of seasonal snow cover influencing the ground thermal regime on western flank of Da Xing'anling Mountains,northeastern China显示文摘Although many studies relevant to snow cover and permafrost have focused on alpine, arctic, and subarctic areas, there is still a lack of understanding of the influences of seasonal snow cover on the thermal regime of the soils in permafrost regions in the mid-latitudes and boreal regions, such as that on the western flank of the Da Xing'anling(Hinggan) Mountains, northeastern China. This paper gives a detailed analysis on meteorological data series from 2001 to 2010 provided by the Gen'he Weather Station, which is located in a talik of discontinuous permafrost zone and with sparse meadow on the observation field. It is inferred that snow cover is important for the ground thermal regime in the middle Da Xing'anling Mountains. Snow cover of 10-cm in thickness and five to six months in duration(generally November to next March) can reduce the heat loss from the ground to the atmosphere by 28%, and by 71% if the snow depth increases to 36 cm. Moreover, the occurrence of snow cover resulted in mean annual ground surface temperatures 4.7–8.2 °C higher than the mean annual air temperatures recorded at the Gen'he Weather Station. The beginning date for stable snow cover establishment(SE date) and the initial snow depth(SDi) also had a great influences on the ground freezing process. Heavy snowfall before ground surface freeze-up could postpone and retard the freezing process in Gen'he. As a result, the duration of ground freezing was shortened by at least 20 days and the maximum depth of frost penetration was as much as 90 cm shallower. | XiaoLi Chang HuiJun Jin YanLin Zhang HaiBin Sun | 2015 | Research in Cold and Arid Regions2015，7，6： | 2 |
| 3 | Orientation and diffraction patterns of c3-Ni2Si precipitates in Cu-Ni-Si alloy显示文摘 | Jia Yanlin Wang Mingpu Chen Chang | 2013 | J Alloy Compd2013，557，： | 1 |
| 4 | Crystallographic facet-dependent stress responses by polyhedral lead sulfide nanocrystals and the potential "safe-by-design" approach显示文摘nanomaterials 的特别物理化学的性质能得到唯一的生物回答。性质活动关系通常为毒性机制的深入的理解并且设计更安全的 nanomaterials 被建立。在这研究,一系列多面的铅硫化物(PbS ) 的特定的结晶的方面的有毒的角色包括截断的八面体, cuboctahedrons,截断的立方体,和立方体, nanocrystals 在人的支气管的上皮的房间(BEAS-2B ) 和鼠科的牙槽的巨噬细胞被调查(未加工 264.7 ) 房间。{ 100 }方面触发方面依赖者被发现有能力细胞的氧化应力和重金属压力回答例如谷胱甘肽弄空,类脂化合物 peroxidation ,反应的氧种类( ROS )生产, heme oxygenase-1 ( HO-1 )和 metallothionein ( MT )表示,和 mitochondrial 机能障碍,当时{ 111 }方面在生物条件下面仍然保持惰性。{ 100 }-facet-dependent 毒性被归功于到 { 100 }-facet-dependent 铅溶解,当时低铅溶解 { 111 } 方面由于负担得起由的强壮的保护 poly (乙烯基 pyrrolidone ) 在合成期间。基于这种方面毒性关系, safe-by-design 策略被设计阻止铅溶解 { 100 } 通过原子地薄的铅氯化物 adlayers 的形成的方面,导致更安全的多面的 PbS nanocrystals。 | Yun Chang Kai Li Yanlin Feng Ning Liu Yan Cheng Xiujuan Sun Yuqing Feng Xi Li Zhijian Wu Haiyuan Zhang | 2016 | Nano Research2016，9，12： | 1 |
| 5 | Impacts ofvegetation on near surface ground thermal regime in the DaXing,anling Mountains in Northeastern China 显示文摘 | Chang Xiaoli Jin Huijun Zhang Yanlin | 2013 | Perma-frost and Periglacial Processes2013，，： | 1 |
| 6 | The efficacy of Kriging spatial interpolation for filling temporal gaps in daily air temperature data: A case study in northeast China显示文摘daily air temperature;;gap filling;;Kriging spatial interpolation;;northeast | YanLin Zhang XiaoLi Chang Ji Liang DongLiang Luo RuiXia He | 2016 | Research in Cold and Arid Regions2016，8，5： | 1 |
| 7 | The emergence of wireless broadband显示文摘 | Abichar Yanlin Peng Chang J M | 2006 | IT Professional2006，8，4： | 1 |
| 8 | Ceramics Inter- national显示文摘 | Chen Yanlin Yan Ming Chang Ying | 2009 | 35:18072009，35，： | 1 |
| 9 | Vegetation impact on the thermal regimes of the active layer and near-surface permafrost in the Greater Hinggan Mountains, Northeastern China显示文摘The ground temperature and active layer are greatly influenced by vegetation in the Greater Hinggan Mountains in Northeastern China.However,vegetation,as a complex system,is difficult to separate the influence of its different components on the ground thermal regime.In this paper,four vegetation types,including a Larix dahurica–Ledum palustre var.dilatatum–Bryum forest(P1),a L.dahurica–Betula fruticosa forest(P2),a L.dahurica–Carex tato forest(P3) in the China Forest Ecological Research Network Station in Genhe,and a Carex tato swamp(P4) at the permafrost observation site in Yitulihe,have been selected to study and compare their seasonal and annual influence on the ground thermal regime.Results show that the vegetation insulates the ground resulting in a relatively high ground temperature variability in the Carex tato swamp where there are no tree stands and shrubs when compared with three forested vegetation types present in the area.Vegetation thickness,structure,and coverage are the most important factors that determine the insulating properties of the vegetation.In particular,the growth of ground cover,its water-holding capacity and ability to intercept snow exert a significant effect on the degree of insulation of the soil under the same vegetation. | XiaoLi Chang ShaoPeng Yu HuiJun Jin YanLin Zhang | 2014 | Research in Cold and Arid Regions2014，6，5： | 0 |
| 10 | Bovine HSD17B8 gene and its relationship with growth and meat quality traits显示文摘17 b-Hydroxysteroid dehydrogenase type 8(HSD17B8) is an important regulator of lipid and steroid metabolism. In the present study, we aimed to assess the effects of HSD17B8 on growth and meat quality traits in cattle. Transcription profile analysis showed that HSD17B8 was primarily expressed in the salpinx, liver, and testis.Meanwhile, we identified three SNPs(SNP1: intron1-A91G; SNP2: exon 1-A90G; and SNP3: intron 8-A86G)of the bovine HSD17B8 gene and investigated its haplotype frequencies and linkage disequilibrium. The detected SNPs were found associated with growth traits(body weight,body length, height at withers, heart girth, hip width, and average daily gain) in native cattle populations(Nanyangand Jiaxian) as well as the meat quality traits(Warner–Bratzler shear force, rib area, dressing percentage, carcass weight, and backfat thickness) in commercial breeds(Angus, Hereford, Limousin, Luxi, Simmental, and Jinnan).Our results provided evidence that polymorphisms in the HSD17B8 gene were associated with growth traits and meat quality traits. Moreover, our findings might be used for marker-assisted selection in beef cattle breeding program. | Yun Ma Ningbo Chen Fen Li Weiwei Fu Yapeng Han Yanlin Chang Xiangxiang Jiang Junya Li Yueyu Bai Xuxin Tan | 2015 | Science Bulletin2015，60，18： | 0 |
| 11 | Impacts of canopy structure on the sub-canopy solar radiation under a deciduous forest based on fisheye photographs显示文摘Forest canopy in a deciduous forest has significant sheltering effects on the sub-canopy solar radiation,significantly influencing the energy balance of snow and permafrost beneath the forest and their spatial distribution.This study employs a digital camera mounted with a fisheye lens to acquire photographs at various times in a growth cycle of the forest canopy at three selected sites in a deciduous forest near the Greater Khingan Mountains Forest Ecological Station,Northeast China.The vegetation types and conditions at the selected sites include P1 in Ledum-Claopodium-L.dahurica,P2 in Carex tato-L.dahurica,and P3 in Betula fruticosa-L.dahurica.After necessary image processing,these photographs were used to identify the canopy structure and its impacts on the sub-canopy solar radiation.Results show that fisheye photographs can successfully capture the forest canopy structure and are useful in estimating the sub-canopy solar radiation.The order of sheltering effects from the largest to the smallest on sub-canopy solar radiation at three selected sites is P3,P1,and P2,highly depending on the canopy density.Then sub-canopy solar radiation was calculated using fisheye photographs and an algorithm validated by in-situ observed solar radiation beneath the canopy at P1 and P3.The results are reasonable,although the accuracy seems compromised due to the mismatch of conditions for calculation and observation.Results also show that the mean annual solar radiation above the canopy was about 148.3 W/m2 in 2018,and the mean annual solar radiation values beneath the canopy were about 90.0,123.8,and 61.0 W/m2 at P1,P2,and P3,with only 60%,84%,and 42%of the total solar radiation penetrating through the canopy,respectively.Even in winter,when the trees are leafless,the canopy sheltering effects cannot be ignored in dense forests.Despite the limitations,fisheye photographs and related algorithms are useful in investigating the forest canopy structure and its impacts on sub-canopy solar radiation. | YanLin Zhang XiaoLin Feng XiaoLi Chang LiMin Tie | 2023 | Research in Cold and Arid Regions2023，15，3： | 0 |
| 12 | Visualization and Analysis of the Volume Dataset for Time-Varing Electromagnetic Simulation显示文摘The three Dimensional(3D)visualization of time-varying Electromagnetic(EM)data in antenna devices can be used to evaluate various parameters,such as the quality of beams and the power performance of antennas,for optimizing the antenna design.Compared with the single volume data,the time-varying data has characteristics of strong continuity,large scale and multi-variable.It is challenging.We proposed a real-time dynamic rendering method using Compute unified device architecture(CUDA)・based volume rendering algorithm.We designed the opacity transfer function as multiple t rapezoid,which represen ts each energy band,and provided a fusion strategy for a horn-like surface and a EM volume model that considers the contribution of both intersection points of surface with viewing ray and sample points of the volume.We also proposed a framework for time-varying 3D EM datasets.Two assessment tests were conducted by both experts and students.Results showed that our 3D visualization method were effective. | SHAO Jingxuan TIAN Ge HAN Jing CHANG Liang CAO Yi LUO Yanlin | 2020 | Chinese Journal of Electronics2020，29，5： | 0 |
| 13 | Identification of microRNA and analysis of target genes in Panax ginseng显示文摘Objective: Ginsenosides, polysaccharides and phenols, the main active ingredients in Panax ginseng, are not different significantly in content between 3 and 5 years old of ginsengs called Yuan ginseng and more than ten years old ones called Shizhu ginseng. The responsible chemical compounds cannot fully explain difference in efficacy between them. According to reports in Lonicerae Japonicae Flos(Jinyinhua in Chinese) and Glycyrrhizae Radix et Rhizoma(Gancao in Chinese), microRNA may play a role in efficacy,so we identified microRNAs in P. ginseng at the different growth years and analyzed their target genes.Methods: Using high-throughput sequencing, the RNA-Seq, small RNA-Seq and degradome databases of P. ginseng were constructed. The differentially expressed microRNAs was identified by qRT-PCR.Results: A total of 63,875 unigenes and 24,154,579 small RNA clean reads were obtained from the roots of P. ginseng. From these small RNAs, 71 miRNA families were identified by bioinformatics target prediction software, including 34 conserved miRNAs, 37 non-conserved miRNA families, as well as 179 target genes of 17 known miRNAs. Through degradome sequencing and computation, we finally verified 13 targets of eight miRNAs involved in transcription, energy metabolism, biological stress and disease resistance, suggesting the significance of miRNAs in the development of P. ginseng. Consistently, major miRNA targets exhibited tissue specificity and complexity in expression patterns.Conclusion: Differential expression microRNAs were found in different growth years of ginsengs(Shizhu ginseng and Yuan ginseng), and the regulatory roles and functional annotations of miRNA targets in P. ginseng need further investigation. | Yingfang Wang Yanlin Chen Mengyuan Peng Chang Yang Zemin Yang Mengjuan Gong Yongqin Yin Yu Zeng | 2023 | Chinese Herbal Medicines2023，15，1： | 0 |
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