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Polyurethane-degrading fungi from soils contaminated with rocket propellant and their ability to decompose alkyne terminated polybutadiene with urethane

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Studies in Fungi 2021年第1期6卷 224-239页

作者： Ren GC Pang AM Gao Y Wu SX Ge ZQ Zhang TF Wanasinghe DN Khan S Mortimer PE Xu JC Gui H Center of Excellence in Fungal Research Mae Fah Luang UniversityChiang Rai 57100Thailand Guiyang Nursing Vocational College Guiyang 550081GuizhouChina Honghe Center for Mountain Futures Kunming Institute of BotanyChinese Academy of SciencesHonghe County 654400YunnanChina School of Science Mae Fah Luang UniversityChiang Rai 57100Thailand Science and Technology on Aerospace Chemical Power Laboratory Hubei Institute of Aerospace ChemotechnologyXiangyang441003HubeiChina

A large amount of propellant materials are produced every year,and storage and disposal of these propellant materials seriously contributes to environmental pollution.Alkyne terminated polybutadiene with urethane segments(PUPB)is the macromolecule backbone of these propellant materials,and degradation of PUPB is central to the eco-friendly treatment of propellant materials.In this study,we isolated a polyurethane(PU)-and PUPB-degrading fungus from soils contaminated with rocket propellant,and the fungus H14 was identified as Fusarium solani(Mart.)Sacc.based on macro-and micro-morphology as well as phylogenetic analyses.The ability of F.solani H14 to degrade PU film and PUPB patches was evaluated via mass loss,scanning electron microscopy(SEM)and enzyme production ability.Mass loss analyses revealed a 25.8%reduction in mass of PU and 1.3%reduction in mass of PUPB after F.solani H14 was incubated with PU and PUPB for 90 days,respectively.We found that F.solani H14 mycelia significantly colonized both PU and PUPB.SEM images showed that the surface of PU films and PUPB patches formed holes,underwent folding and experienced damage as well as irregular fissuring from the erosion of fungal hypha.Moreover,two possible degradative enzymes,lipase and esterase,were produced by F.solani.Our study opens a new avenue of research for eco-friendly treatments of explosive materials and propellants.This paper represents the first article on the degradation of PUPB patches.

关键词： enzyme Fusarium solani mass loss PU PUPB

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Additive manufacturing of energetic materials:Tailoring energetic performance via printing

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Journal of Materials Science & Technology 2022年第32期127卷 29-47页

作者： Nihan Chen Chunlin He Siping pang Experimental Center of Advanced Materials School of Materials Science&EngineeringBeijing Institute of TechnologyBeijing 100081China Yangtze Delta Region Academy of Beijing Institute of Technology Jiaxing 314019China Chongqing Innovation Center Beijing Institute of TechnologyChongqing 401120China State Key Laboratory of Explosion Science and Technology Beijing Institute of TechnologyBeijing 100081China

Additive manufacturing(am),also called three-dimensional(3D)printing,has been developed to obtain energetic materials within the past decade.3D printing represents a family of flexible manufacturing techniques that enable fast and accurate fabrication of structures with complex 3D features and a broad range of sizes,from submicrometer to several meters.Various methods have already been explored,including templating,melting extrusion,inkjet printing and electrospray methods.It was demonstrated that the structure achieved by am could be used to manipulate the reactivity of energetic or reactive materials by changing the flow of gases and entrained particles via architecture.By employing different am techniques,energetic materials with controllable nanostructures and uniformly dispersed ingredients can be prepared.It is exciting to tailor the energy release without defaulting to change the formulation of the conventional method.The combustion and mechanical properties of conventional energetic materials can be retained at the same time.In this review,the preparation and characterization of am energetic materials that have been developed in the last decade are summarized.Various am techniques used in the fabrication of energetic materials are compared and discussed.In particular,formulations of energetic materials applied in am,metallic fuels,binders and energetic fillers and their advantages in terms of combustion efficiency and other properties are proposed.

关键词： Additive manufacturing Energetic materials Nanothermite Propellant

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Green tea extract as a cryoprotectant additive to preserve the motility and DNA integrity of human spermatozoa

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Asian Journal of Andrology 2021年第2期23卷 150-156页

作者： Odai am Alqawasmeh Mingpeng Zhao Carol PS Chan Maran BW Leung Ki C Chow Nikunj Agarwal Jennifer SM Mak Chi C Wang Chi P pang Tin C Li Wai K Chu David YL Chan Assisted Reproductive Technology Unit Department of Obstetrics and GynaecologyFaculty of MedicineThe Chinese University of Hong KongHong KongChina Department of Ophthalmology and Visual Sciences The Chinese University of Hong KongHong KongChina

Cryopreservation impairs sperm quality and functions,including motility and DNA integrity.Antioxidant additives in sperm freezing media have previously brought improvements in postthawed sperm quality.Green tea extract(GTE)is widely considered as an excellent antioxidant,and its beneficial role has been proven in other human cells.This study aims to evaluate the GTE as a potential additive in cryopreservation media of human spermatozoa.In part one,the semen of 20 normozoospermic men was used to optimize the concentration of GTE that maintains sperm motility and DNA integrity against oxidative stress,induced by hydrogen peroxide(H_(2)O_(2)).Spermatozoa were treated with GTE at different concentrations before incubation with H_(2)O_(2).In part two,the semen of 45 patients was cryopreserved with or without 1.0 ng ml^(-1)GTE.After 2 weeks,the semen was thawed,and the effect on sperm motility and DNA fragmentation was observed.Our data showed that GTE significantly protected sperm motility and DNA integrity against oxidative stress induced by H_(2)O_(2)when added at a final concentration of 1.0 ng ml^(-1).We found that the addition of 1.0 ng ml^(-1)GTE to cryopreservation media significantly increased sperm motility and DNA integrity(both Pamage benefited similarly from the GTE supplementation.However,there was no significant change in the reactive oxygen species(ROS)level.In conclusion,supplementing sperm freezing media with GTE has a significant protective effect on human sperm motility and DNA integrity,which may be of clinical interest.

关键词： antioxidants cryopreservation additives sperm cryopreservation sperm DNA fragmentation sperm motility

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High-energy nuclear physics meets machine learning

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Nuclear Science and Techniques 2023年第6期34卷 9-41页

作者： Wan-Bing He Yu-Gang Ma Long-Gang pang Hui-Chao Song Kai Zhou Key Laboratory of Nuclear Physics and Ion-beam Application(MOE) Institute of Modern PhysicsFudan UniversityShanghai200433China Shanghai Research Center for Theoretical Nuclear Physics NSFC and Fudan UniversityShanghai200438China Institute of Particle Physics and Key Laboratory of Quark and Lepton Physics(MOE) Central China Normal UniversityWuhan430079China School of Physics and Center for High Energy Physics Peking UniversityBeijing100871China Frankfurt Institute for Advanced Studies(FIAS) 60438Frankfurt am MainGermany

Although seemingly disparate,high-energy nuclear physics(HENP)and machine learning(ML)have begun to merge in the last few years,yielding interesting results.It is worthy to raise the profile of utilizing this novel mindset from ML in HENP,to help interested readers see the breadth of activities around this intersection.The aim of this mini-review is to inform the community of the current status and present an overview of the application of ML to HENP.From different aspects and using examples,we examine how scientific questions involving HENP can be answered using ML.

关键词： Heavy-ion collisions Machine learning Initial state Bulk properties Medium effects Hard probes Observables

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Diagnostic test

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实用休克杂志（中英文） 2019年第1期3卷 60-64页

作者： Peter pang Yan Chai Hospital

Ⅰ、DIAGNOSTIC UNCERTAINTY We always face diagnostic uncertainty.Decision making,by means of diagnostic tests,is a major task to clinicians,especially in critical patients.Take an example.A man comes with chest pain at 2 am.The gold standard of cardiac catheterization to see if there is any occlusion of coronary arteries,remains the best option.However it is invasive.Cardiologists and laboratory support may not be available.But minutes count.We may want to have a reliable diagnostic test to rule in or rule out myocardial infarct.

关键词： gold standard cardiac catheterization coronary arteries

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A rookie in the ocean of oral and maxillofacial surgery

A rookie in the ocean of oral and maxillofacial surgery

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第十四次中国口腔颌面外科学术会议

作者： Pai pang China Medical University Hospital of Stomatology

I am pangpai from stomatology hospital of China medical university.Since 2013 I started the specialized courses of oral and maxillofacial surgery under the supervision of professor Changfu Sun.This year I graduate as ...

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A Multifunctional Polymer as an Interfacial Layer for Efficient and Stable Perovskite Solar Cells

A Multifunctional Polymer as an Interfacial Layer for Effici...

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第十届新型太阳能材料科学与技术学术研讨会

作者： Zhang Bingqian Chen Kezheng Cui Guanglei pang Shuping College of Materials Science and Engineering Qingdao University of Science and Technology Qingdao Institute of Bioenergy and Bioprocess Technology Chinese Academy of Sciences

Metal-cation defects and halogen-anion defects in perovskite film are critical to the efficiency and stability of perovskite solar cells(PSCs).In this work,a random polymer,poly(methyl methacrylate-co-acrylamide)(PMMA-am),was synthesized to serve as an interfacial passivation layer for synergistically passivating the under-coordinated Pb and anchor the I-of the [PbI]octahedron.Additionally,the interfacial PMMA-am passivation layer can not be destroyed during the hole transport layer deposition because of its low solubility in chlorobenzene.This passivation leads to an enhancement in the open-circuit voltage from 1.12 V to 1.22 V and improved stability in solar cell devices,with the device maintaining 95% of the initial power conversion efficiency(PCE) over 1000 h of maximum power point tracking.Additionally,a large-area solar cell module was fabricated using this approach,achieving a PCE of 20.64%.

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德里达的动物问题

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求是学刊 2014年第2期41卷 31-38页

作者：庞红蕊北京外国语大学外国文学研究所北京100089

德里达认为,海德格尔虽然承诺避免人类中心主义,但始终都没有从中摆脱出来。在《动物故我在》一文中,德里达从个人经验出发证明了动物同样具有伦理性的中断力量,同样可以引发人类的伦理回应。在这"原初-伦理"的时刻,动物不再是人类认知... 详细信息

德里达认为,海德格尔虽然承诺避免人类中心主义,但始终都没有从中摆脱出来。在《动物故我在》一文中,德里达从个人经验出发证明了动物同样具有伦理性的中断力量,同样可以引发人类的伦理回应。在这"原初-伦理"的时刻,动物不再是人类认知的客体,而是一个"无法被概念化"的他者。

关键词：法国哲学德里达海德格尔动物他者

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基于数据挖掘的丑时不寐用药规律研究

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实用中医内科杂志 2023年第9期37卷 62-66,I0009,I0010页

作者：庞硕张立德辽宁中医药大学辽宁沈阳110847

目的基于数据挖掘技术探讨治疗丑时不寐的用药规律。方法通过对古今云医案平台数据库中治疗不寐的有效验案进行检索,筛选其中以丑时(凌晨1时-3时)睡眠易醒且醒后持续半小时难以入睡为主症的不寐病医案,经过数据筛选、清洗、标准化处理... 详细信息

目的基于数据挖掘技术探讨治疗丑时不寐的用药规律。方法通过对古今云医案平台数据库中治疗不寐的有效验案进行检索,筛选其中以丑时(凌晨1时-3时)睡眠易醒且醒后持续半小时难以入睡为主症的不寐病医案,经过数据筛选、清洗、标准化处理,并建立方药数据库,通过Microsoft Excel 2010进行频次分析,通过SPSS Modeler 18.0 SPSS Statistics 22.0对方药分别进行药物的二项、三项关联分析、系统聚类分析、复杂网络分析。结果 73首中药处方中包含中药167种,酸枣仁、甘草、首乌藤、龙骨、茯苓使用频次居前5位,排名前30味药物主要体现了养心安神、镇惊宁心、滋阴潜阳、化痰降浊、交通心肾等治法;二项、三项关联结果多为养心安神、交通心肾、滋阴潜阳;系统聚类分析(以距离≥18分组)得出10组药物组合;复杂网络分析图表明核心组方为柴胡龙骨牡蛎汤合酸枣仁汤加减。结论丑时不寐的用药主要体现为心肝同治,益阴潜阳的治法,注重阴阳调和,将养心安神药与潜阳重镇之品同用,以达到宁心安神,调和五脏之功效。

关键词：数据挖掘关联规则丑时不寐

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巨噬细胞移动抑制因子和细胞间黏附分子-1在慢性牙周炎合并动脉粥样硬化大鼠模型中的表达分析

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安徽医药 2021年第6期25卷 1180-1184,I0007页

作者：庞雪晶昆明市儿童医院口腔科云南昆明650000

目的分析慢性牙周炎(CP)合并动脉粥样硬化(AS)大鼠血清及动脉组织中巨噬细胞移动抑制因子(MIF)以及细胞间黏附分子-1(ICam-1)的表达。方法24只成年雄性SD大鼠用随机数字表法分为四组,分别为正常对照(NC)组、CP组、AS组及CP+AS组,每组各... 详细信息

目的分析慢性牙周炎(CP)合并动脉粥样硬化(AS)大鼠血清及动脉组织中巨噬细胞移动抑制因子(MIF)以及细胞间黏附分子-1(ICam-1)的表达。方法24只成年雄性SD大鼠用随机数字表法分为四组,分别为正常对照(NC)组、CP组、AS组及CP+AS组,每组各6只。采用钢丝结扎双侧上颌第二磨牙联合口腔内接种牙龈卟啉单胞菌(P.gingivalis)建立牙周炎模型;高脂饮食、腹腔注射维生素D3联合左侧颈动脉球囊损伤法建立AS模型。四组分别接受相应的建模处理。12周后,组织病理学观察颈动脉组织的病理改变;体视显微镜下观察各组大鼠牙槽骨吸收面积;全自动生化分析仪检测大鼠血清血脂的表达水平;酶联免疫吸附测定(ELISA)和免疫组织化学法分析血清中和主动脉组织中MIF及ICam-1的表达水平。结果组织病理学检查发现:NC组颈动脉组织未见明显异常,CP组血管壁较NC组略增厚,AS组、CP+AS组颈主动脉组织中出现动脉粥样硬化斑块病变;AS组、CP+AS组血清三酰甘油、总胆固醇、低密度脂蛋白(LDL)水平较NC组、CP组明显升高(Pam-1表达水平明显高于NC组(1.33±0.25)μg/L(P0.05)。免疫组织化学法检测动脉组织中MIF表达(吸光度),AS组(0.127±0.011)、CP+AS组(0.152±0.022)明显高于NC组(0.096±0.010)、CP组(0.010±0.011)(Pam-1表达(吸光度)明显高于NC组(0.133±0.012)、CP组(0.156±0.006)(P0.05)。结论同CP组和AS组相比,CP+AS组血清及主动脉组织中MIF的表达水平及血清中ICam-1的表达水平明显增高,提示慢性牙周炎可能通过升高炎性因子MIF及ICam-1表达的方式促进AS病变的形成过程。

关键词：慢性牙周炎动脉粥样硬化巨噬细胞移动抑制因子细胞间黏附分子-1 大鼠,Sprague-Dawley

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