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A comparison study on structure-function relationship of polysaccharides obtained from sea buckthorn berries using different methods:antioxidant and bile acid-binding capacity

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Food Science and Human Wellness 2024年第1期13卷 494-505页

作者： Qiaoyun Li Zuman dou Qingfei Duan Chun Chen Ruihai Liu Yueming Jiang Bao Yang Xiong Fu SCUT-Zhuhai Institute of Modern Industrial Innovation School of Food Science and EngineeringSouth China University of Technology381 Wushan RoadGuangzhou 510640China Guangzhou Institute of Modern Industrial Technology Nansha 511458China Guangdong Province Key Laboratory for Green Processing of Natural Products and Product Safety Guangzhou 510640China Overseas Expertise Introduction Center for Discipline Innovation of Food Nutrition and Human Health(111 Center) Guangzhou 510640China Department of Food Science Stocking HallCornell UniversityIthaca 14853USA South China Botanical Garden Chinese Academy of SciencesGuangzhou 510650China

In this study,the structural characters,antioxidant activities and bile acid-binding ability of sea buckthorn polysaccharides(HRPs)obtained by the commonly used hot water(HRP-W),pressurized hot water(HRP-H),ultrasonic(HRP-U),acid(HRP-C)and alkali(HRP-A)assisted extraction methods were *** results demonstrated that extraction methods had significant effects on extraction yield,monosaccharide composition,molecular weight,particle size,triple-helical structure,and surface morphology of HRPs except for the major linkage *** analysis showed that HRP-U with filamentous reticular microstructure exhibited better thermal *** HRP-A with the lowest molecular weight and highest arabinose content possessed the best antioxidant ***,the rheological analysis indicated that HRPs with higher galacturonic acid content and molecular weight showed higher viscosity and stronger crosslinking network(HRP-C,HRP-W and HRP-U),which exhibited stronger bile acid binding *** present findings provide scientific evidence in the preparation technology of sea buckthorn polysaccharides with good antioxidant and bile acid binding capacity which are related to the structure affected by the extraction methods.

关键词： Sea buckthorn Extraction method Structure Rheological properties Antioxidant activity Bile acid binding capacity

A justice and innovative way ahead of consumption-based emission accounting approach

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Science China Earth Sciences 2024年第10期67卷 2999-3010页

作者： Qun SHEN Hongbo DUAN Yun TANG Linbing TANG Li SHANG Xinyu dou Wei WEI Weiqiang CHEN Zhu LIU State Key Laboratory of Low Carbon Catalysis and Carbon Dioxide Utilization CAS Key Laboratory of Low-Carbon Conversion Science&EngineeringShanghai Advanced Research InstituteChinese Academy of SciencesShanghai 201210China School of Economics&Management University of Chinese Academy of SciencesBeijing 100190China Key Lab of Urban Environment and Health Institute of Urban EnvironmentChinese Academy of SciencesXiamen 361021China Department of Earth System Science Tsinghua UnivesityBeijing 100084China

Carbon emission accounting is an important basis for global climate *** on the consumption-based accounting(CBA)method,the characteristics of carbon flow between national,regional,and product processes could be more clearly ***,CBA is more conducive to clarifying the attribution of responsibilities between producers and consumers,with the principles of fairness and *** accounting for carbon emissions in typical countries from 1990 to 2019,we found that the CBA emissions are higher than the production-based accounting(PBA)emissions in major developed countries,while the results are reversed for developing *** the past 30 years,the CBA emissions in targeted developed countries generally have shown a downward trend,while in developing countries,they have shown an upward *** emissions in China have shown a continuous growth trend from 1990 to 2019,but the pace has slowed down significantly over the last ***,the embodied carbon intensity of China’s exports continues to decline,indicating that China is providing more green and low-carbon products to the *** the PV industry as an example,this study further reveals the contribution of specific product industries to the country’s carbon transfer through product carbon footprint *** order to provide a scientific basis for global mitigation and climate governance,it is urgent to innovate a scientific,practical,and standardized CBA technology system.

关键词： Consumption-based accounting Production-based accounting Carbon transfer Carbon footprint

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高速铁路大范围穿越采空区关键技术研究

铁道工程学报 2024年第6期41卷 34-39页

作者：赵斗中国铁路设计集团有限公司天津300308

研究目的:太焦铁路是第一条穿越大面积采空区的高速铁路,也是迄今为止国内外穿越采空区分布最广、分布最复杂的高速铁路。本文针对太焦铁路采空区特征,开展高速铁路大范围穿越采空区关键技术研究,对于查清采空分布、合理选择线位、确定... 详细信息

研究目的:太焦铁路是第一条穿越大面积采空区的高速铁路,也是迄今为止国内外穿越采空区分布最广、分布最复杂的高速铁路。本文针对太焦铁路采空区特征,开展高速铁路大范围穿越采空区关键技术研究,对于查清采空分布、合理选择线位、确定安全的路桥隧工程措施具有重要意义。研究结论:(1)研究形成多学科、多层次、多方法耦合采空区勘察技术,在宽达37 km的采空区密布带上找出了200 m的安全通路,提出“两咽喉、一通道、六绕避、二治理”地质通廊;(2)研究形成多维空间选线技术,线位绕避采空区密集、时间久远难以查明的古窑等区域,平面无法绕避时,部分区段线路以隧道形式从采空区下方安全深度通过;(3)研究形成隧道下穿采空区技术,通过围岩稳定性和隧道下穿采空区距离研究,提出隧道支护措施以及探测和预报、质量检测方法;(4)研究形成路基整治技术,针对采空区埋深大、沉降要求高的特点,通过缩小注浆孔间距、调整浆液成分、加大注浆压力等措施,保证了整治效果,可为其他同类工程提供借鉴。

关键词：高速铁路采空区关键技术

Pumping-induced Well Hydraulics and Groundwater Budget in a Leaky Aquifer System with Vertical Heterogeneity in Aquitard Hydraulic Properties

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Acta Geologica Sinica(English Edition) 2024年第2期98卷 477-490页

作者： ZHUANG Chao LÜChenyang YAN Long LI Yabing ZHOU Zhifang WANG Jinguo dou Zhi Walter A.ILLMAN School of Earth Sciences and Engineering Hohai UniversityNanjing 211100China School of Geography Earth and Environmental SciencesUniversity of BirminghamBirmingham B152TTU.K. Department of Modern Mechanics University of Science and Technology of ChinaHefei 230027China Department of Earth and Environmental Sciences University of WaterlooOntario N2L 3G1Canada

In groundwater hydrology,aquitard heterogeneity is often less considered compared to aquifers,despite its significant impact on groundwater hydraulics and groundwater resources evaluation.A semi-analytical solution is derived for pumping-induced well hydraulics and groundwater budget with consideration of vertical heterogeneity in aquitard hydraulic conductivity(K)and specific storage(S_(s)).The proposed new solution is innovative in its partitioning of the aquitard into multiple homogeneous sub-layers to enable consideration of various forms of vertically heterogeneous K or S_(s).Two scenarios of analytical investigations are explored:one is the presence of aquitard interlayers with distinct K or S_(s) values,a common field-scale occurrence;another is an exponentially depth-decaying aquitard S_(s),a regional-scale phenomenon supported by statistical *** investigations reveal that a low-K interlayer can significantly increase aquifer drawdown and enhance aquifer/aquitard depletion;a high-S_(s) interlayer can noticeably reduce aquifer drawdown and increase aquitard *** of low-K or high-S_(s) interlayers also significantly impact well hydraulics and groundwater *** the context of an exponentially depth-decaying aquitard S_(s),a larger decay exponent can enhance aquifer *** using current models with a vertically homogeneous aquitard,half the sum of the geometric and harmonic means of exponentially depth-decaying aquitard S_(s) should be used to calculate aquitard depletion and unconfined aquifer leakage.

关键词： hydrogeology aquitard vertical heterogeneity semi-analytical solution well hydraulics groundwater budget

Toward understanding the microstructure characteristics,phase selection and magnetic properties of laser additive manufactured Nd-Fe-B permanent magnets

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International Journal of Extreme Manufacturing 2024年第1期6卷 277-294页

作者： Bo Yao Nan Kang Xiangyu Li dou Li Mohamed EL Mansori Jing Chen Haiou Yang Hua Tan Xin Lin State Key Laboratory of Solidiffcation Processing Northwestern Polytechnical UniversityXi’anShaanxi 710072People’s Republic of China Arts et Metiers Institute of Technology MSMPHESAM UniversitéF-51006 Chˆalons-en-ChampagneFrance Key Laboratory of Metal High Performance Additive Manufacturing and Innovative Design MIIT ChinaNorthwestern Polytechnical UniversityXi’anShaanxi 710072People’s Republic of China Texas A&M Engineering Experiment Station Institute for Manufacturing SystemsCollege StationTX 77843United States of America

Nd-Fe-B permanent magnets play a crucial role in energy conversion and electronic *** essential magnetic properties of Nd-Fe-B magnets,particularly coercivity and remanent magnetization,are significantly infuenced by the phase characteristics and *** this work,Nd-Fe-B magnets were manufactured using vacuum induction melting(VIM),laser directed energy deposition(LDED)and laser powder bed fusion(LPBF)*** evolution and phase selection of Nd-Fe-B magnets were then clarified in *** results indicated that the solidification velocity(V)and cooling rate(R)are key factors in the phase *** terms of the VIM-casting Nd-Fe-B magnet,a large volume fraction of theα-Fe soft magnetic phase(39.7 vol.%)and Nd2Fe17Bxmetastable phase(34.7 vol.%)areformed due to the low R(2.3×10-1?C s-1),whereas only a minor fraction of the Nd2Fe14B hard magnetic phase(5.15 vol.%)is *** the LDED-processed Nd-Fe-B deposit,although the Nd2Fe14B hard magnetic phase also had a low value(3.4 vol.%)as the values of V(10-2m s-1)and R(1.45×106?C s-1)in the LPBF process resulted in the substantial formation of the Nd2Fe14B hard magnetic phase(55.8 vol.%)directly from the liquid,while theα-Fe soft magnetic phase and Nd2Fe17Bxmetastable phase precipitation are suppressed in the LPBF-processed Nd-Fe-B ***,crystallographic texture analysis reveals that the LPBF-processedNd-Fe-B magnets exhibit isotropic magnetic ***,the LPBF-processed Nd-Fe-B deposit,exhibiting a coercivity of 656 k A m-1,remanence of 0.79 T and maximum energy product of 71.5 k J m-3,achieved an acceptable magnetic perfor

关键词： laser additive manufacturing(LAM) Nd-Fe-B permanent magnets numerical simulation microstructure magnetic properties

Body color plasticity of Diaphorina citri reflects a response to environmental stress

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Insect Science 2024年第3期31卷 937-952页

作者： Jiayao Fan Feng Shang Huimin Pan Chenyang Yuan Tianyuan Liu Long Yi Jinjun Wang Wei dou Key Laboratory of Entomology and Pest Control Engineering College of Plant ProtectionSouthwest UniversityChongqingChina Key Laboratory of Agricultural Biosafety and Green Production of Upper Yangtze River(Ministry of Education) Southwest UniversityChongqingChina Academy of Agricultural Sciences Southwest UniversityChongqingChina National Navel Orange Engineering Research Center Gannan Normal UniversityGanzhouJiangxi ProvinceChina

Body color polyphenism is common in Diaphorina *** studies compared physiological characteristics in ***,but the ecological and biological significance of its body color polyphenism remains poorly *** studied the ecological and molecular effects of stressors related to body color in *** or low temperature induced a high proportion of gray morphs,which had smaller bodies,lower body weight,and greater susceptibility to the insecticide *** performed transcriptomic and metabolomics analysis of 2 color morphs in *** expression dynamics revealed that the differentially expressed genes were predominantly involved in energy metabolism,including fatty acid metabolism,amino acid metabolism,and carbohydrate *** these genes,plexin,glycosidase,phospholipase,take out,trypsin,and triacylglycerol lipase were differentially expressed in 2 color morphs,and 6 hsps(3 hsp70,hsp83,hsp90,hsp68)were upregulated in gray *** metabolome data showed that blue morphs exhibited a higher abundance of fatty acid and amino acid,whereas the content of carbohydrates was elevated in gray *** study partly explains the body color polyphenism of *** and provides insights into the molecular changes of stress response of ***.

关键词： body color energy metabolism environmental stress phenotypic plasticity polyphenism trade-off

陆地棉磷脂酶C基因家族的鉴定及其在棉纤维发育过程中的表达分析

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农业生物技术学报 2024年第2期32卷 283-298页

作者：窦玲玲牛换换郑凯咸阳师范学院化学与化工学院新疆农业大学农学院

磷脂酶C(phospholipase C, PLC)是参与磷脂酰肌醇4,5-二磷酸水解的酶，其下游产物介导Ca2+和蛋白激酶C的信号转导。本研究利用磷脂酶C的隐马尔可夫模型(PF09279和PF04185)从陆地棉(Gossypium hirsutum)’农大棉8号’(NDM8)基因组中鉴定... 详细信息

磷脂酶C(phospholipase C, PLC)是参与磷脂酰肌醇4,5-二磷酸水解的酶，其下游产物介导Ca2+和蛋白激酶C的信号转导。本研究利用磷脂酶C的隐马尔可夫模型(PF09279和PF04185)从陆地棉(Gossypium hirsutum)’农大棉8号’(NDM8)基因组中鉴定到28个GhPLC基因家族成员。蛋白质序列系统发育分析将GhPLC家族成员分为PIPLC(16个)和nPLC(12个)两大亚组；基因复制分析显示，50%的GhPIPLC和92%的GhnPLC基因起源于片段重复，且受到纯化选择；GhPLC家族基因上游2 000 bp序列启动子顺式作用元件分析显示，所有的GhPLC基因启动子均含有应答植物激素或非生物胁迫的顺式作用元件，表明其可能被植物激素或非生物胁迫诱导表达；qPCR结果显示，15个含有响应赤霉素的顺式作用元件的GhPLC基因中的14个可以被赤霉素诱导上调表达；含有响应生长素的顺式作用元件的15个GhPLC基因中的14个可以被生长素类似物诱导上调表达；25个GhPLC家族基因在棉纤维起始和伸长阶段上调表达，占GhPLC基因家族成员的89%。本研究为后续深入研究GhPLC基因在棉纤维起始和伸长过程中的功能提供了参考。

关键词：陆地棉 PLC基因家族进化分析启动子表达分析

Plastic mulch increases dryland wheat yield and water-use productivity,while straw mulch increases soil water storage

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Journal of Integrative Agriculture 2024年第9期23卷 3174-3185页

作者： Hubing Zhao Guanfei Liu Yingxia dou Huimin Yang Tao Wang Zhaohui Wang Sukhdev Malhi Adnan Anwar Khan College of Natural Resources and Environment Northwest A&F UniversityYangling 712100China Key Laboratory of Plant Nutrition and the Agri-environment in Northwest China Ministry of Agriculture and Rural AffairsYangling 712100China Department of Renewable Resources University of AlbertaEdmonton T6G 2H1Canada

Amplifying drought stress and high precipitation variability impair dryland wheat *** problems can potentially be minimized by using plastic mulch(PM)or straw mulch(SM).Therefore,wheat grain yield,soil water storage,soil temperature and water-use productivity of PM and SM treatments were compared with no mulch(CK)treatment on dryland wheat over a period of eight *** to the CK treatment,PM and SM treatments on average significantly increased grain yield by 12.6 and 10.5%,*** to the CK treatment,SM treatment significantly decreased soil daily temperature by 0.57,0.60 and 0.48℃ for the whole seasons,growing periods and summer fallow periods,*** contrast,compared to the CK treatment,PM treatment increased soil daily temperature by 0.44,0.51 and 0.27℃ for the whole seasons,growing periods and summer fallow periods,*** soil temperature under SM allowed greater soil water storage than under *** water storage pre-seeding was 17%greater under the SM than under the PM *** water storage post-harvest was similar for the PM and SM treatments,but evapotranspiration was 4.5%higher in the SM than in the PM ***,water-use productivity was 6.6%greater under PM than under the SM ***,PM treatment increased dryland wheat yield and water-use productivity,while straw mulch increased soil water storage.

关键词： plastic mulch soil water storage straw mulch water-use productivity winter wheat

Mesenchymal stromal cells modulate unfolded protein response and preserve β-cell mass in type 1 diabetes

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BIOCELL 2024年第7期48卷 1115-1126页

作者： SIYUAN LIU YUAN ZHAO YU YU dou YE QIAN WANG ZHAOYAN WANG ZUO LUAN Department of Pediatrics The Sixth Medical CenterChinese PLA General HospitalBeijing100037China

Introduction:Transplantation of mesenchymal stromal cells(MSCs)is a promising therapy for type 1 diabetes(T1D).However,whether the infused MSCs affect the endoplasmic reticulum stress or subsequent unfolded protein response inβcells remains ***:To investigate this,we induced early-onset T1D in non-obese diabetic mice using ***,T1D mice were randomly assigned to receive either MSCs or phosphate-buffered *** observed the in vivo homing of MSCs and assessed their effectiveness by analyzing blood glucose levels,body weight,histopathology,pancreatic protein expression,and serum levels of cytokines,proinsulin,and ***:Infused MSCs were found in the lungs,liver,spleen,and pancreas of T1D *** exhibited various effects,including reducing blood glucose levels,regulating immunity,inhibiting inﬂammation,increasingβ-cell areas,and reducing the expression of key proteins in the unfolded protein response *** serum proinsulin and C-peptide levels were signiﬁcantly higher in the MSCs treatment group than in the T1D model ***,there was no signiﬁcant difference in the biomarker ofβ-cell endoplasmic reticulum stress,the ratio of fasting serum proinsulin to C-peptide,between the two ***:Ourﬁndings reveal that MSCs infusion does not alleviate endoplasmic reticulum stress inβcells directly but modulates the unfolded protein response pathway to preserveβ-cell mass and function in T1D mice.

关键词： Type 1 diabetes Mesenchymal stromal cells Endoplasmic reticulum stress Unfolded protein response Non-obese diabetic mice