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| 1 | Characteristics of soil organic carbon andtotal nitrogen storages for differentland-use types in Central Yunnan Plateau显示文摘Two-factor analysis of variance and redundancy analysis were used to analyze the characte-ristics of soil organic carbon total nitrogen storage in garden land,forestland,grassland,farmland,and bare land in the Dachunhe watershed of Jinning District,Kunming City,Yunnan Province,China.The effects of the soil organic carbon,total nitrogen stratification ratio,soil physical and chemical factors on the storage characteristics of organic carbon and total nitrogen of different land-use types were analyzed.The results show that the rates of carbon and nitrogen stratification in soil from 0-20 cm and 40-60 cm of the same land-use types differed are statistically significant(P<0.05).The organic carbon and total nitrogen stratification ratio SR1 of garden land soil are 38.5%and 25.3%,respectively,which are higher than SR^(2).The soil organic carbon and total nitrogen stratification ratio SR^(2) of different land-use types are greater than SR1.There are statistically significant differences in the SR^(2) soil organic carbon and total nitrogen stratification ratios(P<0.05).Soil organic carbon and total nitrogen storage of diffe-rent land-use types gradually decrease with increasing soil depth,with the maximum soil organic carbon and total nitrogen storage in the 0-20 cm soil layer.Soil organic carbon and total nitrogen sto-rage at the same soil depth are significantly different(P<0.05).Soil organic carbon and total nitrogen storage in the garden land are greater than those in the other land-use types.Soil organic carbon and total nitrogen storage in 0-20 cm garden land are 4.96 and 3.19 times than those in bare land,respectively;soil organic carbon and total nitrogen storage are explained by 93.66%and 1.53%in redundancy analysis RDA1 and RDA2,respectively.All physicochemical factors except Available Phosphorus and pH are statistically significance with carbon and nitrogen storage(P<0.05).Soil cationic exchange capacity,Available Phosphorus,C/N ratio,and Moisture Content are positively correlated with organic carbon and total nitrogen storage.In contrast,soil Bulk Density is negatively correlated with organic carbon storage and total nitrogen storage.Available Phosphorus,C/N ratio,and Moisture Content are the main factors promoting soil organic carbon and total nitrogen accumulation. | SHEN Fangyuan TUO Yunfei WANG Qian WANG Fei ZHENG Yang DU Wenjuan XIANG Ping | 2022 | 排灌机械工程学报2022，40，5： | 1 |
| 2 | Designed fabrication of mesoporous silica-templated self-assembled theranostic nanomedicines显示文摘Theranostic nanosystems that integrate diagnosis and therapy have garnered increasing attention for personalized medicine.The integration of the versatile nanoparticles to fabricate self-assembled theranostic nanomedicines becomes increasingly important in current medical research.Mesoporous silica nanoparticles(MSN)with their highly attractive physicochemical properties and favorable morphological attributes represent ideal templates for the controlled assembly and integration of functional nanomaterials to fabricate self-assembled theranostic nanomedicines.The rationally designed combination strategy and heterostructure will improve the overall bioavailability and preserve the unique property of each nanocomponent.In this review,the cutting-edge strategies for the designed fabrication of MSN-templated self-assembled nanomedicines are summarized.We categorize MSN-based nanomedicines by their unique heterostructures,including core-shell,yolk-shell,core-satellite,heterodimer and core-shell-satellite structures,and discuss the controlled assembly approaches as well as the intriguing applications for disease theranostics.Finally,a perspective on the challenges in the clinical translation of self-assembled theranostic nanomedicines is highlighted. | Fangyuan Li&Daishun Ling Yang Du Zheng Chen Ji Young Lee Peihua Lin Fan Xia Yunan Guan Fangyuan Li Daishun Ling | 2021 | Science China Chemistry2021，64，2： | 0 |
| 3 | Cytochrome P450s in algae:Bioactive natural product biosynthesis and light-driven bioproduction显示文摘Algae are a large group of photo synthetic organisms responsible for approximately half of the earth’s total photosynthesis.In addition to their fundamental ecological roles as oxygen producers and as the food base for almost all aquatic life,algae are also a rich source of bioactive natural products,including several clinical drugs.Cytochrome P450 enzymes(P450s) are a superfamily of biocatalysts that are extensively involved in natural product biosynthesis by mediating various types of reactions.In the post-genome era,a growing number of P450 genes have been discovered from algae,indicating their important roles in algal life-cycle.However,the functional studies of algal P450s remain limited.Benefitting from the recent technical advances in algae cultivation and genetic manipulation,the researches on P450s in algal natural product biosynthesis have been approaching to a new stage.Moreover,some photoauto trophic algae have been developed into 'photo-bioreactors' for heterologous P450s to produce high-value added pharmaceuticals and chemicals in a carbon-neutral or carbon-negative manner.Here,we comprehensively review these advances of P450 studies in algae from 2000 to 2021. | Shanmin Zheng Jiawei Guo Fangyuan Cheng Zhengquan Gao Lei Du Chunxiao Meng Shengying Li Xingwang Zhang | 2022 | Acta Pharmaceutica Sinica B2022，12，6： | 0 |
| 4 | Apios americana Medik flower extract protects high-glucose-treated hepatocytes and Caenorhabditis elegans显示文摘Type 2 diabetes(T2D)is a chronic metabolic disease related to glucose metabolism disorders.Increasing evidences indicate that flavonoids obtained from plants have beneficial effects on T2D.Apios americana Medik,originally cultivated in North America,is rich in flavonoids.In this study,A.americana flower extract(AFE)was purified and flavonoids were identified.The beneficial effects of AFE on glucose metabolism disorders were investigated.Results showed that AFE protected hepatic cells from oxidative stress caused by hyperglycemia and increased glucose consumption and glucose uptake.The AKT pathway was involved in AFE-mediated hypoglycemic action in LO2 cells,accompanied by phosphorylation of FoxO1,Gsk-3βand AMPK.In vivo,AFE protected Caenorhabditis elegans(C.elegans)from oxidative stress under hyperglycemia and restored the expressions of PMK-1 and SKN-1.Furthermore,AFE decreased excessive glucose and lipid accumulation and extended the lifespans of high glucose(HG)treated C.elegans.AFE might be beneficial to decrease glucose metabolism disorders and T2D. | Su Zhou Jiafei Chen Fangyuan Fan Yani Pan Xinyu Feng Lushuang Yu Shuying Gong Xiaodong Zheng Yihong Jiang Qiang Chu | 2022 | Food Bioscience2022，45，1： | 0 |
| 5 | Nitrogen-doped holey graphene nanoscrolls for high-energy and high-power supercapacitors显示文摘Porous structure and heteroatom doping are two key parameters for significantly boosting the capacitive performance of graphene-based materials.Herein,we report a facile approach to prepare onedimensional(ID) nitrogen-doped holey graphene nanoscrolls(NHGNSs) through cold quenching treatment of two-dimensional graphene oxide sheets,followed by thermal annealing in the successive atmosphere of NH3 and air.Benefiting from the synergy of the unique 1D tubular morphology,abundant nanoholes and nitrogen doping,the NHGNSs exhibit a high specific capacitance of 126 F/g at 1 A/g in ionic liquid electrolyte and excellent rate capability with 81% of the capacitance retained at 20 A/g.Furthermore,the fabricated symmetric supercapacitors based on NHGNSs achieve both high energy density of 53.5 Wh/kg at 875 W/kg and high power density of 17.5 kW/kg at 43.4 Wh/kg.The simple synthetic process and superior electrochemical performance suggest the great potential of NHGNSs for supercapacitor application. | Feng Su Shuanghao Zheng Fangyan Liu Xiong Zhang Fangyuan Su Zhong-Shuai Wu | 2021 | Chinese Chemical Letters2021，32，2： | 0 |
| 6 | The role of single-boron of N-doped graphene for effective nitrogen reduction显示文摘Room-temperature electrocatalytic nitrogen reduction reaction(NRR)is of paramount significance for the fertilizer industry and fundamental catalysis science.However,many NRR catalysts were based on the use of metals.Herein,we focus on exploring boron-based,metal-free,efficient catalysts for NRR by den-sity functional theory calculations with van der Waals corrections(DFT+D3).Our results show that the NRR performance of the boron active site can be improved by tuning the N-coordination environment in a graphene sheet,and the B-N-C structures show excellent stability.By considering the correlation be-tween the Bader charges of the boron dopant over N-decorated graphene and their NRR activities,the ra-tional design principle of a boron-based catalyst for NRR is developed.The boron-site with one pyridinic nitrogen in a double-vacancy structure is found to be a highly active center,with low reaction energy(0.53 eV)and kinetic barrier(0.84 eV)through the distal mechanism.We also found that the charge loss of boron considerably hampers hydrogen adsorption,which in turn promotes the NRR efficiency by hin-dering the competing hydrogen evolution.This work offers new insights into developing low-cost,highly effective boron-based materials as promising electrocatalysts for green ammonia synthesis. | Chuangwei Liu Haoren Zheng Tianyi Wang Zhongyuan Guo Fangyuan Zhu Hongbo Xie Gaowu Qin Hao Li Song Li | 2023 | Journal of Materials Science & Technology2023，，28： | 0 |
| 7 | Collaborative control of fine particles and ozone required in China for health benefit显示文摘PM2.5 concentration declined significantly nationwide,while O3 concentration increased in most regions in China in 2013–2020.Recent evidences proved that peak season O3 is related to increased death risk from non-accidental and respiratory diseases.Based on these new evidences,we estimate excess deaths associated with long-term exposure to ambient PM2.5 and O3 in China following the counterfactual analytic framework from Global Burden Disease.Excess deaths from non-accidental diseases associated with long-term exposure to ambient O3 in China reaches to 579(95%confidential interval(CI):93,990)thousand in 2020,which has been significantly underestimated in previous studies.In addition,the increased excess deaths associated with long-term O3 exposure(234(95%CI:177,282)thousand)in 2013–2020 offset three quarters of the avoided excess deaths(302(95%CI:244,366)thousand)mainly due to PM2.5 exposure reduction.In key regions(the North China Plain,the Yangtze River Delta and the Fen-Wei Plain),the former is even larger than the latter,particularly in 2017–2020.Health benefit of PM2.5 concentration reduction offsets the adverse effects of population growth and aging on excess deaths attributed to PM2.5 exposure.Increase of excess deaths associated with O3 exposure is mainly due to the strong increase of O3 concentration,followed by population aging.Considering the faster population aging process in the future,collaborative control,and faster reduction of PM2.5 and O3 are needed to reduce the associated excess deaths. | Ling Qi Zhige Tian Nan Jiang Fangyuan Zheng Yuchen Zhao Yishuo Geng Xiaoli Duan | 2023 | Frontiers of Environmental Science & Engineering2023，17，8： | 0 |
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