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Biochars and their magnetic derivatives as enzyme-like catalysts mimicking peroxidases

Biochar 2020年第1期2卷 121-134页

作者： Ivo Safarik Jitka Prochazkova Eva Baldikova Hans-peter Schmidt Witold Kwapinski Ivo Medrik Petr Jakubec Mirka Safarikova Kristyna Pospiskova Department of Nanobiotechnology Biology CentreISBCASNa Sadkach 737005 Ceske BudejoviceCzech Republic Regional Centre of Advanced Technologies and Materials Palacky UniversitySlechtitelu 2778371 OlomoucCzech Republic Ithaka Institute for Carbon Strategies Ancienne Eglise 9ArbazSwitzerland Chemical Sciences Department Bernal InstituteFaculty of Science and EngineeringUniversity of LimerickLimerickIreland

Various materials have been extensively investigated to mimic the structures and functions of natural *** describe the discovery of a new catalytic property in the group of biochar-based carbonaceous materials,which are usually produced during biowaste thermal processing under specific *** tested biochars exhibited peroxidase-like catalytic *** feedstock,pyrolysis temperature,size of resulting biochar particles or biochar modification(e.g.,magnetic particles deposition)influenced the peroxidase-like *** activity was measured with the chromogenic organic substrates N,N-diethyl-p-phenylenediamine(DPD)or 3,3′,5,5′-tetramethylbenzidine(TMB),in the presence of hydrogen *** biochar composite was studied as a complementary material,in which the presence of iron oxide particles enhances catalytic activity and enables smart magnetic separation of catalyst even from complex *** activity of the selected biochar had an optimum at pH 4 and temperature 32℃;biochar catalyst can be reused ten times without the loss of *** DPD as a substrate,Km values for native wood chip biochar and its magnetic derivative were 220±5μmol L^(−1)and 690±80μmol L^(−1),respectively,while Vmax values were 10.1±0.3μmol L^(−1)min^(−1)and 16.1±0.4μmol L^(−1)min^(−1),*** catalytic activity enabled the decolorization of crystal violet both in the model solution and the fish pond water containing suspended solids and dissolved organic *** observed biochar enzyme mimetic activity can thus find interesting applications in environmental technology for the degradation of selected *** general,this property predestines the low-cost biochar to be a perspective supplement or even substitution of common peroxidases in practical applications.

关键词： Peroxidase-like activity Biochar Magnetic iron oxides Microwave synthesis

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More to it than meets the eye: a case report of incomitant esotropia in a child caused by a giant basilar aneurysm

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Annals of Eye Science 2023年第4期8卷 1-5页

作者： Tianwei Ellen Zhou Carmen Parra Farinas Abhaya VKulkarni peter Dirks Leonardo RBrandão Prakash Muthusami Nasrin Najm-Tehrani Department of Ophthalmology and vision Sciences University of TorontoTorontoOntarioCanada Department of Diagnostic Imaging the Hospital for Sick ChildrenUniversity of TorontoTorontoOntarioCanada Department of Neurosurgery the Hospital for Sick ChildrenUniversity of TorontoTorontoOntarioCanada Division of Haematology/Oncology Department of Pediatricsthe Hospital for Sick ChildrenUniversity of TorontoTorontoOntarioCanada Dalla Lana School of Public Health University of TorontoTorontoOntarioCanada Department of Ophthalmology the Hospital for Sick ChildrenUniversity of TorontoTorontoOntarioCanada

Background:Esotropia is a common concern in pediatric ophthalmology *** most cases stem from strabismus,it is crucial for physicians to differentiate atypical features that might indicate underlying organic causes,such as vi nerve palsy,hinting at the presence of intracranial spaceoccupying *** the occurrence of cerebral aneurysms in children is rare,they can have severe *** Description:Here,we described an extremely rare case of giant basilar fusiform aneurysm measuring 4.0 cm×3.9 cm×3.9 cm in an otherwise healthy 8-year-old child,and analyzed its atypical features that suggested an intracranial *** further described an endovascular approach,performed by interventional radiologists,and discussed its advantages over the conventional *** patient continued to be followed by our multidisciplinary *** had a stable post-operative course and made an excellent recovery *** the 1-year follow-up,he was orthophoria with excellent vision and ***:To our knowledge,this is the first pediatric case in Canada where a giant intracranial aneurysm was treated *** salient red flags—progressive incomitant esotropia and diplopia,the presence of myopia(rather than hyperopia),nystagmus and abnormal saccadic movements—should be astutely recognized by clinicians as intracranial giant aneurysms carry a poor prognosis.A multidisciplinary approach is essential for the management of such cases.

关键词： Sixth nerve palsy incomitant esotropia giant basilar aneurysm interventional radiology case report

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Influence of Pixel Quality, Land Cover, and Hydroclimatic Cycle on Moderate Resolution Imaging Spectroradiometer Inundation Monitoring Performance in the Pantanal, Brazil

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Journal of Geoscience and Environment Protection 2023年第2期11卷 90-120页

作者： Sérgio Wagner Gripp da Silveira Ibraim Fantin-Cruz peter Zeilhofer Midwest Regional Unit National Institute for Space Research Cuiabá Brazil Department of Sanitary and Environmental Engineering Federal University of Mato Grosso Cuiabá Brazil Department of Geography Federal University of Mato Grosso Cuiabá Brazil

Moderate resolution imaging spectroradiometer (MODIS) time series (TS) have been widely applied for flood monitoring in large tropical wetlands. However, little systematic work is available on the influence of pixel quality, vegetation cover, and the annual hydroclimatic cycle on classification performance. In this study, this issue is examined based on a six-year, 250 m resolution MOD13Q1 TS underpinned by extensive in situ measurements. The most parsimonious logistic regression model was obtained for land surface water index (LSWI) and enhanced vegetation index (Evi). The inclusion of the 500 m MCD12Q1 land cover Type 2 product improves accuracy. Performance markedly decreases for subsets that include pixels with a vi quality assurance (QA) level poorer than 0110 and/or a pixel reliability (PR) of three. When a Savitzky-Golay filter was used for TS reconstitution, performance is slightly lower than those obtained in a classification of a vi QA 0001 or PR = 0 level strata;moreover, these have the advantage of gap-free flood monitoring. The overall accuracy (OA) of the PR = 0 subset is better for grasslands, and slightly lower for Savannah, and for woodland and forests. The average OA is highest for the dry season, intermediate for the rainy/flooded season, and lowest for the transitional seasons, when the wetland becomes flooded or dries. Comparisons of internal, k-fold, and external validations indicate that only external validation enables a realistic assessment of flood-mapping performance. The complete substitution of PR = 3 pixels by filled-in values is recommended for operational flood monitoring, and it is concluded that the use of the simplified PR metrics as filtering criteria for gap filling and smoothing is sufficient for flood monitoring in the Pantanal. Classification metrics vary more strongly as a function of the hydrological period than by vegetation cover. MOD13Q1 users should be aware that OA in forest stands during the transition seasons are, on

关键词： MODIS Classification Performance Flooding LSWI Evi Large Tropical Wetlands

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Potentials of Two Nigerian Spices—Piper nigrumand Monodora myristicaas Sources for Cheap Natural Antioxidants

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American Journal of Plant Sciences 2013年第5期4卷 1105-1115页

作者： Edak A. Uyoh peter N. Chukwurah Roseline C. Akarika victoria A. Antia Department of Genetics and Biotechnology University of Calabar Calabar Nigeria.

Two commonly consumed spices in Nigeria—Piper nigrum (leaf and seed) and Monodora myristica (seed) were evaluated for natural antioxidant potentials in complementary in vitro assay systems. Extracts of the tested plant parts contained low amounts of antioxidant compounds: 4.00 - 6.65 μg GAE/mg and 2.50 - 10.38 μg RE/mg for phenols and flavonoids respectively. The extracts scavenged DPPH and hydroxyl radicals in the range of 4.32% - 37.37% (inferior to ascorbic acid and gallic acid used as standards) and 6.43% - 17.10% respectively. In the reducing power and phosphomolybdenum assays, the extracts showed ability to reduce Fe (III) and Mo (vi) ions to their lower valence states of Fe (II) and Mo (V) respectively, although these activities were inferior to those of the standards used. Comparatively, Monodora myristica seed extract was superior to Piper nigrum leaf and seed extracts in antioxidant potential, but all the extracts generally showed dose-dependent antioxidant activities. Evidently, the studied spice plants are not without some natural antioxidant capacity and would contribute appreciably in combating free radical damages when consumed.

关键词： Antioxidant Piper nigrum Monodora myristica Spices Free Radicals

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Patients with severe schistosomiasis mansoni in Ituri Province, Democratic Republic of the Congo

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Infectious Diseases of Poverty 2021年第2期10卷 50-63页

作者： Maurice M.Nigo peter Odermatt David Wully Nigo Georgette B.Salieb-Beugelaar Manuel Battegay Patrick R.Hunziker Nanomedicine Translation Group Intensive Care UnitUniversity Hospital Basel University of BaselPetersgraben 44031 BaselSwitzerland. CLINAMEuropean Foundation for Clinical Nanomedicine Alem annengasse 12P.O.Box4016 BaselSwitzerland. University of Basel Petersplatz 1BaselSwitzerland. Institut Superieur DesTechniques Medicales(ISTM)Nyankunde BP 55 BuniaDemocratic Republic of Congo. Swiss Tropical and Public Health Institute Socinstrasse 57P.O.Box4002 BaselSwitzerland. Centre Hospitalier IngbokoloDem ocratic Republic of Congo. Departm ent of Infectiology and Hospital Hygiene University Hospital BaselPetersgraben 44031 BaselSwitzerland.

Background:Severe hepatosplenic complications arise in patients with chronic Schistosoma mansoni infection after heavy exposure to disease agents in endemic *** complications are rarely reported and,hence,*** presentation:We report on eight patients with severe morbidity associated with *** infection in Ituri Province,northeastern Democratic Republic of Congo(DRC).The patients were identified during a community-based survey in 2017;one patient was seen at the district *** taking the patients'history,a clinical examination and an abdominal ultrasonographical examination were *** infection was diagnosed in fecal(Kato-Katz technique)and urine(point-of-case circulating cathodic antigen test)*** eight patients with severe intestinal and hepatosplenic complications were identified from four villages with high *** infection prevalence and related *** patients'ages ranged from 19 to 57 years;four patients were *** patients reported *** patients were severely *** patients reported non-specific abdominal symptoms,such as diarrhea(six patients),abdominal pain(seven patients),and blood in the stool(five patients),as well as weight loss(two patients).Abdominal ultrasonography revealed ascites in four *** patients had portal hypertension with hepatomegaly(seven patients)or splenomegaly(five patients).Of the six patients with a discernable liver parenchyma pattern,five displayed pattern F and three patient displayed pattern *** parenchyma was not visible for two patients with severe *** *** infection was confirmed in six patients,with infection intensity ranging from light to *** *** positive patients were treated with praziquantel(40 mg/kg body weight)and referred to the district hospital for *** patient with severe ascites died two weeks after we saw *** to security and accessibility reasons,the villages could not be vi

关键词： Intestinal schistosomiasis Severe case Hepatomegaly Splenomegaly Ascites Hematemesis Morbidity Mortality Democratic Republic of the Congo Ultrasonography

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Amaranthus cordatusas a Green Corrosion Inhibitor for Mild Steel in H2SO4and NaCl

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Journal of Minerals and Materials Characterization and Engineering 2014年第3期2卷 194-199页

作者： Michael O. Nwankwo peter O. Offor Simeon I. Neife Lucky C. Oshionwu Ndubuisi E. Idenyi Department of Industrial Physics Ebonyi State University Abakaliki Nigeria Department of Metallurgical and Materials Engineering University of Nigeria Nsukka Nigeria

This work studies the use of Amaranthus cordatus as the corrosion inhibitor for conventional mild steel in 0.5 M and 1.0 M of both H2SO4 and NaCl. The effects of different concentrations of the acid and base on the inhibition efficiency of Amaranthus cordatus were tested at room temperature and at different inhibitor volumes. The experiment was set for 30 days and weight-loss corrosion technique was employed in obtaining the corrosion penetration rate using the standard equation: . The result shows that the rates of corrosion of the mild steel increased with an increase in concentration of the acid or base and also decreased with increasing volume of Amaranthus cordatus. Expectedly, the inhibition efficiency was found to be greater in sodium chloride than in tetraoxosulphate vi acid. Also inhibition efficiency was found to increase with increase in extracts volume and decrease in concentration of the acid or base. These findings strongly suggest that Amaranthus cordatus can be used as the inhibitor for preventing the corrosion of mild steel.

关键词： Corrosion Inhibition Efficiency Amaranthus cordatus Mild Steel Tetraoxosulphate (vi) Acid Sodium Chloride

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3D-printed facet-attached microlenses for advanced photonic system assembly

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Light(Advanced Manufacturing) 2023年第2期4卷 1-17页

作者： Yilin Xu Pascal Maier Mareike Trappen Philipp-Immanuel Dietrich Matthias Blaicher Rokas Jutas Achim Weber Torben Kind Colin Dankwart Jens Stephan Andreas Steffan Amin Abbasi Padraic Morrissey Kamil Gradkowski Brian Kelly peter O’Brien Wolfgang Freude Christian Koos Institute of Photonics and Quantum Electronics(IPQ) Karlsruhe Institute of Technology(KIT)Engesserstr.576131 KarlsruheGermany Institute of Microstructure Technology(IMT) KITHermann-von-Helmholtz-Platz 176344 Eggenstein-LeopoldshafenGermany Vanguard Automation GmbH Gablonzer Strasse.1076185 KarlsruheGermany ficon TEC Service GmbH Im Finigen 328832 AchimGermany II-vi Inc. Reuchlinstraße 10/1110553 BerlinGermany Photonics Research Group Ghent University-imecTechnologiepark-Zwijnaarde 126B-9052 GentBelgium Tyndall National Institute T12 R5CP CorkIreland Eblana Photonics Ltd. West Pier Business Campus3 Old Dunleary RdDún LaoghaireDublinA96 A621Ireland

Wafer-level mass production of photonic integrated circuits(PIC)has become a technological mainstay in the field of optics and photonics,enabling many novel and disrupting a wide range of existing ***,scalable photonic packaging and system assembly still represents a major challenge that often hinders commercial adoption of PIC-based ***,chip-to-chip and fiber-to-chip connections often rely on so-called active alignment techniques,where the coupling efficiency is continuously measured and optimized during the assembly *** unavoidably leads to technically complex assembly processes and high cost,thereby eliminating most of the inherent scalability advantages of PIC-based *** this paper,we demonstrate that 3D-printed facet-attached microlenses(FaML)can overcome this problem by opening an attractive path towards highly scalable photonic system assembly,relying entirely on passive assembly techniques based on industry-standard machine vision and/or simple mechanical *** can be printed with high precision to the facets of optical components using multi-photon lithography,thereby offering the possibility to shape the emitted beams by freely designed refractive or reflective ***,the emitted beams can be collimated to a comparatively large diameter that is independent of the device-specific mode fields,thereby relaxing both axial and lateral alignment ***,the FaML concept allows to insert discrete optical elements such as optical isolators into the free-space beam paths between PIC *** show the viability and the versatility of the scheme in a series of selected experiments of high technical relevance,comprising pluggable fiber-chip interfaces,the combination of PIC with discrete micro-optical elements such as polarization beam splitters,as well as coupling with ultra-low back-reflection based on non-planar beam paths that only comprise tilted optical *** on our re

关键词： Photonic integration Photonic assembly Photonic packaging Additive laser manufacturing Multi-photon lithography Facet-attached microlenses Optical alignment tolerances Fiber-chip coupling Hybrid multi-chip modules

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Trace-Level Analysis of Hexavalent Chromium in Lake Sediment Samples Using Ion Chromatography Tandem Mass Spectrometry

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Journal of Environmental Protection 2016年第3期7卷 422-434页

作者： Stefanie Mädler Fengrong Sun Cindy Tat Nadya Sudakova peter Drouin Robert J. Tooley Eric J. Reiner Teresa A. Switzer Richard Dyer H. M. Skip Kingston Matt Pamuku Vasile I. Furdui Laboratory Services Branch Ontario Ministry of the Environment and Climate Change Ontario Canada Conservation Ontario Ontario Canada Department of Chemistry University of Toronto Ontario Canada Ontario Geological Survey Ontario Ministry of Northern Development and Mines Ontario Canada Department of Chemistry and Biochemistry Duquesne University Pittsburgh USA Applied Isotope Technologies Pittsburgh USA

The analysis of hexavalent chromium, Cr(vi), in soil and sediment samples has been predominantly carried out in materials containing elevated levels. Reliable analysis of trace-level of Cr(vi) in sediment samples remains challenging. Cr(vi) analyses with multipoint calibration and speciated isotope dilution (SID) adapted from U.S. EPA method 6800 were used to measure lower-level Cr(vi) on an ion chromatograph coupled with a tandem mass spectrometer (IC-MS/MS). Lake sediment samples were collected from various locations in Northern Ontario and Cr(vi) was extracted using both alkaline digestion and ethylene diaminetetraacetic acid (EDTA) extraction. Certified reference materials were extracted and analyzed by IC-MS/MS and UV-viS detection. The SID-MS approach allowed for the quantification of Cr(vi) in samples with concentration levels below 0.5 μg.g-1 wet weight.

关键词： Trace-Level Analysis Ion Chromatography Tandem Mass Spectrometry Chromium Speciation Speciated Isotope Dilution

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慢性肾脏病患者铁剂应用的争议：来自改善全球肾脏病预后组织(KDIGO)会议的结论

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肾脏病与透析肾移植杂志 2016年第4期25卷 363-370页

作者： Iain C.Macdougall Andreas J.Bircher Kai-Uwe Eckardt Gregorio T.Obrador Carol A.Pollock peter Stenvinkel Dorine W.Swinkels Christoph Wanner Gü nter Weiss Glenn M.Chertow 陈佩玲(翻译) 龚德华(审校) Department of Renal Medicine King's College Hospital London UK Allergy Unit Dermatology Clinic University Hospital Basel Basel Switzerland Department of Nephrology and Hypertension Friedrich-Alexander-Universitat Erlangen-Numberg Erlangen Germany Universidad Panamericana School of Medicine Mexico City Mexico University of Sydney Sydney Australia Royal North Shore Hospital Sydney Australia Division of Renal Medicine Department of Clinical Science Intervention and Technology Karolinska University Hospital Stockholm Sweden Department of Laboratory Medicine Translational Metabolic Laboratory Radboud University Medical Center Nijmegen the Netherlands Renal Division University Hospital of Wiirzburg Wiirzburg Germany Department of Internal Medicine vi Infectious Disease Immunology Rheumatology Pneumology Medical University of Innsbruck Innsbruck Austria Division of Nephrology Stanford University School of Medicine Palo Alto California USA 南京军区南京总医院肾脏科国家肾脏疾病临床医学研究中心全军肾脏病研究所南京210016 不详

慢性肾脏病和终末期肾病患者常需补铁治疗。但近年来铁剂的使用逐年增加,带来了铁超载、氧化应激和超敏反应等新问题,并可能促进感染的发生,其使用的安全性受到关注。为此,改善全球肾脏病预后组织(KDIGO)召开专家组会议,全面评估铁剂使... 详细信息

慢性肾脏病和终末期肾病患者常需补铁治疗。但近年来铁剂的使用逐年增加,带来了铁超载、氧化应激和超敏反应等新问题,并可能促进感染的发生,其使用的安全性受到关注。为此,改善全球肾脏病预后组织(KDIGO)召开专家组会议,全面评估铁剂使用的利和弊,并且提供合理使用方案以减轻急性反应及其他毒副作用。

关键词：慢性肾脏病超敏反应感染铁超载氧化应激

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Ten decadal advances in fungal biology leading towards human well‑being

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Fungal Diversity 2022年第5期116卷 547-614页

作者： Ausana Mapook·Kevin DHyde Kevin D.Hyde Khadija Hassan Blondelle Matio Kemkuignou Adela Cmokova Frank Surup Eric Kuhnert Pathompong Paomephan Tian Cheng Sybren de Hoog Yinggai Song Ruvishika S.Jayawardena Abdullah M.S.Al‑Hatmi Tokameh Mahmoudi Nadia Ponts Lena Studt‑Reinhold Florence Richard‑Forget K.W.Thilini Chethana Dulanjalee L.Harishchandra peter E.Mortimer Huili Li Saisamorm Lumyong Worawoot Aiduang Jaturong Kumla Nakarin Suwannarach Chitrabhanu S.Bhunjun Feng‑Ming Yu Qi Zhao Doug Schaefer Marc Stadler Center of Excellence in Fungal Research Mae Fah Luang UniversityChiang Rai 57100Thailand School of Science Mae Fah Luang UniversityChiang Rai 57100Thailand Department Microbial Drugs Helmholtz Centre for Infection Research(HZI)and German Centre for Infection Research(DZIF)Partner Site Hannover‑BraunschweigInhoffenstrasse 738124 BrunswickGermany Institute of Microbiology Technische Universitat BraunschweigSpielmannstrase 738106 BrunswickGermany Laboratory of Fungal Genetics and Metabolism Institute of MicrobiologyCzech Academy of SciencesPragueCzech Republic Centre of Biomolecular Drug Research(BMWZ) Institute for Organic ChemistryLeibniz University HannoverSchneiderberg 3830167 HannoverGermany Department of Biotechnology Faculty of ScienceMahidol University272 Rama VI RoadRatchathewiBangkok 10400Thailand Center of Expertise in Mycology Radboud University Medical Center/Canisius Wilhelmina HospitalNijmegenThe Netherlands Key Laboratory of Environmental Pollution Monitoring and Disease Control Guizhou Medical UniversityGuiyangChina Microbiology Parasitology and Pathology Graduate ProgramFederal University of ParanaCuritibaBrazil Department of Dermatology Peking University First HospitalPeking UniversityBeijingChina Natural and Medical Sciences Research Center University of NizwaNizwaOman Department of Biochemistry Erasmus University Medical CenterRotterdamThe Netherlands INRAE UR1264 Mycology and Food Safety(MycSA)33882 Villenave d’OrnonFrance Department of Applied Genetics and Cell Biology Institute of Microbial GeneticsUniversity of Natural Resources and Life SciencesVienna(BOKU)Tulln an der DonauAustria Beijing Key Laboratory of Environment Friendly Management on Fruit Diseases and Pests in North China Institute of Plant ProtectionBeijing Academy of Agriculture and Forestry SciencesBeijing 100097China Key Laboratory for Plant Diversity and Biogeography of East Asia Kunming Institute of BotanyChinese Academy of SciencesKunming 650201YunnanChina Centre for Mountai

Fungi are an understudied resource possessing huge potential for developing products that can greatly improve human *** the current paper,we highlight some important discoveries and developments in applied mycology and interdisciplinary Life Science *** examples concern recently introduced drugs for the treatment of infections and neurological diseases;application of–OMICS techniques and genetic tools in medical mycology and the regulation of mycotoxin production;as well as some highlights of mushroom cultivaton in *** for new diagnostic tools in medical mycology and the exploitation of new candidates for therapeutic drugs,are also *** addition,two entries illustrating the latest developments in the use of fungi for biodegradation and fungal biomaterial production are *** other areas where there have been and/or will be significant developments are also *** is our hope that this paper will help realise the importance of fungi as a potential industrial resource and see the next two decades bring forward many new fungal and fungus-derived products.

关键词： Biomaterial CRISPR Drug development Morel cultivation Mushroom cultivation Mycotoxin biosynthesis Plastic degradation

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