Microbial fabrication of metal nanoparticles(MNPs)has received significant attention due to the advantages of low toxicity,energy efficiency and ecological safety.Diverse groups of MNPs can be synthesized intracellula...Microbial fabrication of metal nanoparticles(MNPs)has received significant attention due to the advantages of low toxicity,energy efficiency and ecological safety.Diverse groups of MNPs can be synthesized intracellularly or extracellularly by various wild-type microorganisms,including bacteria,fungi,algae and viruses.Synthetic biology approaches,represented by genetic engineering,have been applied to overcome the shortcomings in productivity,stability,and controllability of biosynthetic MNPs.Scanning electron microscope(SEM),transmission electron microscope(TEM)and other characterization techniques assist in deciphering their unique properties.In addition,biosynthetic MNPs have been widely explored for the utilization in environmental remediation and contaminant detection.And machine learning contains a great potential for designing targeted MNPs and predicting their toxicity.This review provides a comprehensive overview of the research progress in the microbial synthesis of MNPs.An outlook on the current challenges and future prospects in the biologically controllable synthesis and engineering environmental applications of MNPs is also provided in this review.展开更多
Understanding the paleoenvironment and phytogeographical history of the Tibetan Plateau,China relies on discovering new plant fossils.The Qaidam Basin has long been regarded as an ideal‘field laboratory’to investiga...Understanding the paleoenvironment and phytogeographical history of the Tibetan Plateau,China relies on discovering new plant fossils.The Qaidam Basin has long been regarded as an ideal‘field laboratory’to investigate the paleoclimate and paleobiological evolution of the northern Tibetan Plateau.However,fossil angiosperms from the Qaidam Basin are rare,and our knowledge of its paleovegetation is poor.Here,we report fossil leaves and fruits of Betulaceae found from the Oligocene Shangganchaigou Formation of northwestern Qaidam Basin(Huatugou area).Comparative morphological analysis led us to assign the fruits to the Betula subgenus Betula and the leaves to Carpinus grandis.These findings,together with other reported fossil plants from the same locality,reveal a close floristic linkage between the Qaidam Basin and Europe during the Oligocene.The northern pathway of this floristic exchange may have crossed through the Qaidam Basin during the late Paleogene.This floristic linkage may have been facilitated by the continuous narrowing of the Turgai Strait and stronger westerlies,which transported moisture and provided favorable climatic conditions.Indeed,fossil plants collected from the Qaidam Basin suggest that during the Oligocene this region had warm and humid deciduous broad-leaf forest,which differs from the region’s modern vegetation and indicates that the Qaidam Basin may have been a suitable region for these plants to flourish and spread during the Oligocene.展开更多
Reports and claims have been made reflecting opinions of the environmental impacts of the Whein Town Landfill Facility on the residents of the Whein Town Community. This study seeks to examine the environmental effect...Reports and claims have been made reflecting opinions of the environmental impacts of the Whein Town Landfill Facility on the residents of the Whein Town Community. This study seeks to examine the environmental effects of the Whein Town Landfill on nearby residents, and the effectiveness of the existing mitigation schemes. This cross-sectional study used 4-point-Likert and 2-point-dichotomous scales questionnaires to collect information from 352 Whein Town community household heads. The findings reveal that “odorous emissions” represent the most critical environmental challenge, severely impacting residents’ well-being and quality of life. By contrast, “garbage spillage along routes” has a minimal impact on residents’ lives, with many residents rating it as “Not Serious”. Six out of eight mitigation implemented schemes achieved a success rate below 25%, one performed at approximately 50%, and only one scheme—the landfill fencing—was effectively implemented, reaching a near-perfect success rate of 99.99%. Therefore, residents of Whein Town are experiencing adverse environmental effects that can be remediated with proper planning and the implementation of existing schemes.展开更多
基金supported by National Key Research and Development Program of China(No.2020YFC1808204-01)Nanchang“Double Hundred Plan”Project(Innovative Talents-Talent Introduction)+1 种基金the State Key Laboratory of Urban Water Resource and Environment(Harbin Institute of Technology)(No.2021TS11)Heilongjiang Provincial Key Laboratory of Environmental Biotechnology and Heilongjiang Touyan Innovation Team Program。
文摘Microbial fabrication of metal nanoparticles(MNPs)has received significant attention due to the advantages of low toxicity,energy efficiency and ecological safety.Diverse groups of MNPs can be synthesized intracellularly or extracellularly by various wild-type microorganisms,including bacteria,fungi,algae and viruses.Synthetic biology approaches,represented by genetic engineering,have been applied to overcome the shortcomings in productivity,stability,and controllability of biosynthetic MNPs.Scanning electron microscope(SEM),transmission electron microscope(TEM)and other characterization techniques assist in deciphering their unique properties.In addition,biosynthetic MNPs have been widely explored for the utilization in environmental remediation and contaminant detection.And machine learning contains a great potential for designing targeted MNPs and predicting their toxicity.This review provides a comprehensive overview of the research progress in the microbial synthesis of MNPs.An outlook on the current challenges and future prospects in the biologically controllable synthesis and engineering environmental applications of MNPs is also provided in this review.
基金the China Postdoctoral Science Foundation(No.2022M723151)the Second Tibetan Plateau Scientific Expedition Research Program(No.2019QZKK0704)+1 种基金the National Natural Science Foundation of China(No.42172005,41272026,41972008,31870200)the Strategic Priority Research Program(B)of the Chinese Academy of Sciences(XDB26000000)
文摘Understanding the paleoenvironment and phytogeographical history of the Tibetan Plateau,China relies on discovering new plant fossils.The Qaidam Basin has long been regarded as an ideal‘field laboratory’to investigate the paleoclimate and paleobiological evolution of the northern Tibetan Plateau.However,fossil angiosperms from the Qaidam Basin are rare,and our knowledge of its paleovegetation is poor.Here,we report fossil leaves and fruits of Betulaceae found from the Oligocene Shangganchaigou Formation of northwestern Qaidam Basin(Huatugou area).Comparative morphological analysis led us to assign the fruits to the Betula subgenus Betula and the leaves to Carpinus grandis.These findings,together with other reported fossil plants from the same locality,reveal a close floristic linkage between the Qaidam Basin and Europe during the Oligocene.The northern pathway of this floristic exchange may have crossed through the Qaidam Basin during the late Paleogene.This floristic linkage may have been facilitated by the continuous narrowing of the Turgai Strait and stronger westerlies,which transported moisture and provided favorable climatic conditions.Indeed,fossil plants collected from the Qaidam Basin suggest that during the Oligocene this region had warm and humid deciduous broad-leaf forest,which differs from the region’s modern vegetation and indicates that the Qaidam Basin may have been a suitable region for these plants to flourish and spread during the Oligocene.
文摘Reports and claims have been made reflecting opinions of the environmental impacts of the Whein Town Landfill Facility on the residents of the Whein Town Community. This study seeks to examine the environmental effects of the Whein Town Landfill on nearby residents, and the effectiveness of the existing mitigation schemes. This cross-sectional study used 4-point-Likert and 2-point-dichotomous scales questionnaires to collect information from 352 Whein Town community household heads. The findings reveal that “odorous emissions” represent the most critical environmental challenge, severely impacting residents’ well-being and quality of life. By contrast, “garbage spillage along routes” has a minimal impact on residents’ lives, with many residents rating it as “Not Serious”. Six out of eight mitigation implemented schemes achieved a success rate below 25%, one performed at approximately 50%, and only one scheme—the landfill fencing—was effectively implemented, reaching a near-perfect success rate of 99.99%. Therefore, residents of Whein Town are experiencing adverse environmental effects that can be remediated with proper planning and the implementation of existing schemes.
