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| 1 | Isotope Chronology and Geochemistry of the Lower Carboniferous Granite in Xilinhot, Inner Mongolia, China显示文摘Geochronological and geochemical analyses were performed on K-feldspar granites and monzonitic granites from the Xilinhot area, Inner Mongolia, China. Zircon U/Pb ages indicate that the two types granites were emplaced during the Lower Carboniferous. The K-feldspar granites(332 Ma) have the typical A-type granite characteristics of a post-collision setting. The monzonitic granites have an emplacement age of 323 Ma. Zircon εHf values of the former range from +12.8 to +14.2, with an average T_(DM2) of 453 Ma. The latter have lower zircon ε_(Hf) values, ranging from +5.4 to +10.7, with an average T_(DM2) of 798 Ma. The strong, positive ε_(Hf) values of the zircon indicate that both sets of samples are from a juvenile crust formed in an oceanic crust subduction stage, although the monzonitic granite may have undergone a hybridization of crustal materials. These results indicate a younger post orogenic event. The Paleo-Asian Ocean had closed before the Early Carboniferous and the Xilinhot area started its post-orogenic evolution with an extensional tectonic environment during the Early Carboniferous. | Xiaocheng Zhao Wenxiao Zhou Dong Fu Bo Huang Mengchun Ge | 2018 | Journal of Earth Science2018，29，2： | 8 |
| 2 | Transition Metal-Catalyzed Allylic C(sp3)-H Functionalization via η3-Allylmetal Intermediate显示文摘1.Introduction The past few decades have witnessed extensive studies on transition metal-catalyzed C-H bond activations and subsequent carbon-carbon and/or carbon-heteroatom bond formations because these methods provide more atom-and step-economical pathways than those traditional transformations starting from prefunctionalized substrates. | Ronghua Wang Yuxin Luan Mengchun Ye | 2019 | Chinese Journal of Chemistry2019，37，7： | 7 |
| 3 | Micro RNA profiles and potential regulatory pattern during the early stage of spermatogenesis in mice显示文摘Spermatogenesis is a complicated and poorly understood process that relies on the precise regulation of the self-renewal and differentiation of spermatogonia. In many organisms, micro RNAs(mi RNAs) are involved in multiple developmental processes as critical regulators of transcriptional and post-transcriptional gene silencing. This study investigated the expression pattern of mi RNAs in type B spermatogonia cells(BSc) and primary spermatocytes(PSc) of mice, using a high-throughput small RNA sequencing system. The results revealed that the expression levels of Let-7 family mi RNAs were remarkably high in both cell types. Furthermore, the expression levels of mi R-21, mi R-140-3p, mi R-103, mi R-30 a, mi R-101 b and mi R-99 b were decreased during the transformation from BSc to PSc. These mi RNAs target vital genes that participate in apoptosis, cell proliferation and differentiation, junction assembly and cell cycle regulation. These results highlight the indispensable role of mi RNAs in spermatogenesis. | LUO MengMeng HAO LiLi HU Fen DONG YaNan GOU LiXia ZHANG WenDian WANG Xin ZHAO YuHui JIA MengChun HU SongNian ZHANG XiuJun | 2015 | Science China(Life Sciences)2015，58，5： | 6 |
| 4 | Contourlet HMT model with directional feature显示文摘According to Shanno's information theory,the directional feature of texture is defined as the value of directional variable when an image signal attains a singularity of random distribution.In terms of this definition,we calculate the texture's directional features using Tamura's method and study the directional probability distribution of Contourlet coefficients.Then we find that the directional features tend to be conveyed across parent and child subbands.Based on this conclusion,we establish a novel probability distribution model of hidden direction variables under the condition of hidden state variable's distribution,named Contourlet HMT model with directional feature.The structure and training method of the model are presented as well.Moreover,an unsupervised context-based image segmentation algorithm is proposed on the basis of the proposed model.Its effectiveness is verified via extensive experiments carried out on several synthesized images and remote sensing images. | WANG XiangHai CHEN MingYing SONG ChuanMing XU MengChun FANG LingLing | 2012 | Science China(Information Sciences)2012，55，7： | 6 |
| 5 | High-risk phenotypes of genetic disease in a Neonatal Intensive Care Unit population显示文摘To the Editor: Genetic diseases contribute to 35% of deaths during the first year of life and are a significant cause of intensive care.[1] A previous study based on the China Neonatal Genomes Project investigated the genetic causes of early infant deaths and found that >25% of deceased neonates with genetic diagnoses can be cured if diagnosed in time.[2] Therefore, it is crucial to target and diagnose neonates with genetic diseases as early as possible. According to our experience, the typical phenotypes, such as special facial features or multiple congenital anomalies (MCAs), indicate a high risk of genetic disease and lead physicians to perform genetic testing in neonates as early as possible. However, in practice, infants without typical phenotypes typically undergo a long and costly diagnostic process before genetic diagnoses are confirmed. Moreover, a recent survey by the American College of Medical Genetics and Genomics (ACMG) and other national professional organizations indicated that there are insufficient numbers of qualified geneticists to fulfil genetic service needs.[3] The ACMG published the general clinical features for genetic testing indications. For example, patients with phenotypes or family history data that strongly implicate a genetic cause may undergo genetic testing.[1] However, the study indicated that many genetic conditions arise de novo or are inherited with no family history.[1] A previous study attempted to apply the non-phenotype-driven panel approach in neonates admitted to the neonate intensive care unit (NICU).[4] However, at present, the diagnostic yield is only 3.45% (1/29).[4] In addition, the economic and ethical issues associated with genomic screening remain challenging. Therefore, the available indications for genetic testing may improve the management of genetic diseases. | Tiantian Xiao Qi Ni Huiyao Chen Huijun Wang Lin Yang Bingbing Wu Yun Cao Guoqiang Cheng Laishuan Wang Liyuan Hu Hongfang Mei Yulan Lu Mengchun Gong Xinran Dong Wenhao Zhou | 2022 | Chinese Medical Journal2022，，5： | 2 |
| 6 | Differentiations of geographic distribution and subsistence strategies between Tibetan and other major ethnic groups are determined by the physical environment in Hehuang Valley显示文摘The people of the Tibetan Plateau have received extensive attention from scholars because of their unique adaptability to the low temperature and anoxic environments. However, the Tibetan communities and their habitats in the low-altitude regions of the plateau have rarely been studied in a scientific manner. Based on the extraction of geographic information of 197 towns in the Hehuang Valley and on variance analysis, this study examines the habitats and subsistence strategies of the Tibetans and other major ethnic groups in the low-latitude region of the Tibetan Plateau. Our statistical results show that the annual average temperature of Tibetan habitats in the Hehuang Valley is relatively high. The relatively warm environment of the valley allows the Tibetans in that area to cultivate wheat and barley and raise cattle and sheep—a subsistence strategy significantly different from that of other Tibetans in the high-altitude regions in the Tibetan Plateau. In addition, the Tibetan communities in the Hehuang Valley include similar agri-pastoral ethnic groups (including Hui and Salar), both of which adopt similar subsistence strategies. The agricultural ethnic groups (Han and Tu) live in a relatively cool and humid environment facilitating agricultural production, while the agri-pastoral ethnic groups (Tibetan, Hui, and Salar) inhabit relatively warm and arid environment in the valley. Due to the lack of agricultural activities, agri-pastoral groups must also engage in animal husbandry to supplement their diet. In the Ando Tibetan region, the subsistence strategies of the ethnic groups are closely related to their physical environment.Those ethnic groups communicate among themselves, integrate, and influence each other, resulting in a diversified culture. This study proves that the habitat variation at a regional scale corresponds significantly to the variation of subsistence strategies. Our findings may further refine knowledge about the human-environmental relationships of Tibetans and lead future research towards using quantitative methods to analyse the intersection of physical environment and ethnic groups' distribution. | Xin JIA Harry F.LEE Mengchun CUI Guoquan CHENG Yang ZHAO Hong DING Ricci P.H.YUE Huayu LU | 2019 | Science China Earth Sciences2019，62，2： | 2 |
| 7 | Instrument for insulation conditions detection of roof insulator on high-speed-train显示文摘With the rapid development of high-speed-railway,environment around high voltage device on train roof becomes very complicated. Most train accidents happened due to occurrence of flashover on roof insulator,but the insulation condition estimation of insulator in such environment is much difficult. To ensure the insulation property of electric equipment,and guarantee the operation safety of high-speed-train,here established an instrument with high reliability which can on-line monitor insulation condition of roof insulator and give out advanced alarm before the incipient insulator flashover. The instrument consists of three parts,Data Acquisition & Sensor,Data Processing and Back Processing. Anti-interference and protection methods are processed to Rogowski coil sensor for better leakage current signal. To avoid the fluctuation from railway power supply,four modules are set to filter the power supply waveform. Through laboratory measurement,it is shown that the leakage current and the impedance angle can be detected by the instrument accurately. From the comparison of leakage current and impedance angle results under different moisture condition and the alarm operation when leakage current value reached threshold,this instrument can give out enough information for staff to understand the insulation condition of insulator. | ZHANG Xueqin Yin Guolong GAO Guoqiang SHAO Mengchun YIN Xianbin LI Chunmao WU Guangning | 2014 | Instrumentation2014，1，2： | 2 |
| 8 | Sand dunes as potential sources of dust in northern China显示文摘While saltation bombardment of sand grains on a fine substrate can produce considerable dust, the well-sorted nature of sand dunes tends to preclude them from consideration as major dust sources. Recent research, however, has revealed that sand dunes can, in some cases, be large sources of dust. We used the PI-SWERL(Portable In-Situ Wind Erosion Laboratory) to measure in the field the potential of sand dunes and other desert landforms to emit particulate matter <10 μm(PM-10) dust in the Tengger, Ulan Buh, and Mu Us deserts of northern China. Combined with high resolution particle size measurements of the dune sand, an assessment of sand dunes as a dust source can be made. Large active transverse dunes tend to contain little to no stored PM-10, yet they produce a low dust flux. Coppice dunes stabilized by vegetation contain appreciable PM-10 and have very high dust emission potential. There is a positive correlation between the amount of PM-10 stored in a dune and its potential dust flux. Saltation liberates loose fines stored in dunes, making them very efficient dust emitters compared to landforms such as dry lake beds and washes where dust particles are unavailable for aeolian transport due to protective crusts or sediment cohesion. In cases where large dunes do not store PM-10 yet emit dust when active, two hypotheses can be considered:(1) iron-oxide grain coatings are removed during saltation, creating dust, and(2) sand grains collide during saltation, abrading grains to create dust. Observations reveal that iron oxide coatings are present on some dune sands. PI-SWERL data suggests that low dust fluxes from dunes containing no stored dust may represent an estimate for the amount of PM-10 dust produced by removal of iron oxide coatings. These results are similar to results from dunes in the United States. In addition, PI-SWERL results suggest that dust-bearing coppice dunes, which cover vast areas of China's sandy deserts, may become major sources of dust in the future if overgrazing, depletion of groundwater, or drought destabilizes the vegetation that now partially covers these dunes. | Mark R SWEENEY LU HuaYu CUI MengChun Joseph A MASON FENG Han XU ZhiWei | 2016 | Science China Earth Sciences2016，59，4： | 2 |
| 9 | Bimetallic anchoring catalysis for C–H and C–C activation显示文摘Following the age of directing group,anchoring catalysis starts coming to the center of the stage.Different from the directinggroup strategy that needs a preinstalled directing group in substrates,anchoring catalysis relies on a reversible interaction between a substrate and a catalyst,which then directs metal to activate inert chemical bonds.Such reversible directing effect not only generates good site-and stereo-selectivity as traditional directing groups do but also eliminates the requirement of stoichiometric amounts of directing groups.Among variously reported anchoring catalysis,coordinative bimetallic anchoring catalysis in general displays superior reactivity than others because coordinative bonding not only affords strong interaction of catalysts with substrates but also displays good compatibility with substrates and reaction conditions.In recent years,big progress has been achieved for coordinative bimetallic anchoring catalysis.This review gave a detailed summary of this field,including catalyst development,catalyst types,reaction types and reaction mechanisms. | Jiang-Fei Li Yu-Xin Luan Mengchun Ye | 2021 | Science China Chemistry2021，64，11： | 2 |
| 10 | Granule development and performance in sucrose fed anaerobic baffled reactors显示文摘 | Zonglian She Xilai Zheng Bairen Yang Chunji Jin Mengchun Gao | 2005 | Journal of Biotechnology2005，，2： | 1 |
| 11 | Pulsed Eddy Current Imaging and Frequency Spectrum Analysis for Hidden Defect Non- destructive Testing显示文摘 | He Yunze Pan Mengchun Luo Feilu | 2011 | NDT&E International2011，44，4： | 1 |
| 12 | Defect char-acterisation using pulsed eddy current thermography undertransmission mode and NDT applications显示文摘 | Yunze He Mengchun Pan and Feilu Luo | 2012 | NDT & EInternational2012，52，11： | 1 |
| 13 | A Reversed Construction between Deities and Demons:A Case Study of Ne Zha:I’m the Destiny显示文摘In 2019,Ne Zha:I’m the Destiny won more than 5-billion-yuan box office in Chinese movie market.Although the box office is not the only criterion for judging the quality of an animated movie,Ne Zha breaks a certain stereotype in storytelling,technical means,and the setting of the positive and negative characters.This potentially indicates that in producing an animated film,Chinese artists start to pay more attention to how to refine a movie production,or how to make the story more interesting.One of the attractive elements of this movie is that,Ne Zha has made a breakthrough in creation of a character of Children’s hero,and is totally different from its previous versions:with his joy and sorrow,audiences see the characteristics of Ne Zha as a nice as well as an aggressive boy.This partially because in setting the role of Ne Zha,boundaries between the good and the evil or between beauty and ugly are not so clear in the animation,while it features that Chinese cartoons are set to focus more on authenticity rather than their instructive functions.Additionally,the change of the image of Ne Zha and the subversive characters re-created in the movie have metaphorical significances,featuring how“Chinese school”reconstructs the subjectivity of Chinese stories in contemporary world. | Hai Tang Yang You Mengchun Ma | 2021 | Journal of Educational Theory and Management2021，5，1： | 1 |
| 14 | Effect of salinity on extracellular polymeric substances of activated sludge from an anoxic-aerobic sequencing batch reactor显示文摘 | WANG Zichao GAO Mengchun WANG Zhe | 2013 | Chemosphere2013，93，27： | 1 |
| 15 | Relationship between interleukin-1β mRNA level in gastric fundic mucosa and gastric juice pH in patients infected with Helicobacter pylori显示文摘 | Wang Mengchun Takahisa Furuta Misako Takashima Hajime Futami Hiroyuki Hanai Eizo Kaneko | 1998 | Gastroenterology1998，，： | 1 |
| 16 | Comparison between a submerged membrane bioreactor and a conventional activated sludge system on treating ammonia-bearing inorganic wastewater 显示文摘 | Gao Mengchun | 2004 | Biotechnology2004，108，3： | 1 |
| 17 | Differentially expressed genes in early gestational chorionic villi after administration of mifepristone显示文摘 | Liu Meiling ghi Xinquan Jia Mengchun | 2011 | Gynecological Endocrinol2011，27，6： | 1 |
| 18 | Defect classification based on rectangular pulsed eddy current sensor in different directions显示文摘 | Yunze He Feilu Luo Mengchun Pan Xiangchao Hu Junzhe Gao Bo Liu | 2009 | Sensors & Actuators: A Physical2009，，1： | 1 |
| 19 | Magnetic flux vertial motion modulation for1~' noise reduction of magnetic tunnel junctions 显示文摘 | Mengchun P Jiafei H | 2012 | Sensors and Actuators A : Physical2012，179，： | 1 |
| 20 | Use of endoscopic ultra -sound-guided injection in endoscopic resection of soid submucosal tumors显示文摘 | Sun Siyu Wang Mengchun Sun Suyun | 2001 | Endoscopy2001，33，： | 1 |
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