Academic literature on the topic 'Fungi-algae'
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Journal articles on the topic "Fungi-algae"
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Holfeld, Harald. "Parasitic fungi infecting planktonic algae." SIL Proceedings, 1922-2010 24, no. 4 (September 1991): 2621. http://dx.doi.org/10.1080/03680770.1989.11900037.
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Funk, Vicki A., Patrick Herendeen, and Sandra Knapp. "Taxonomy: naming algae, fungi, plants." Nature 546, no. 7660 (June 2017): 599. http://dx.doi.org/10.1038/546599c.
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Ślusarczyk, Joanna, Edyta Adamska, and Joanna Czerwik-Marcinkowska. "Fungi and Algae as Sources of Medicinal and Other Biologically Active Compounds: A Review." Nutrients 13, no. 9 (September 12, 2021): 3178. http://dx.doi.org/10.3390/nu13093178.
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Many species of fungi including lichenized fungi (lichens) and algae have the ability to biosynthesize biologically active compounds. They produce, among others, polysaccharides with anticancer and immunostimulatory properties: (1) Background: This paper presents the characteristics of the most important bioactive compounds produced by fungi and algae; (2) Methods: Based on the example of the selected species of mushrooms, lichens and algae, the therapeutic properties of the secondary metabolites that they produce and the possibilities of their use are presented; (3) Results: The importance of fungi, especially large-fruited mushrooms, lichens and algae, in nature and human life is discussed, in particular, with regard to their use in the pharmaceutical industry and their nutritional value; (4) Conclusions: The natural organisms, such as fungi, lichenized fungi and algae, could be used as supplementary medicine, in the form of pharmaceutical preparations and food sources. Further advanced studies are required on the pharmacological properties and bioactive compounds of these organisms.
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Wang, Jun, Guoming Zeng, Fei Wang, Xin Huang, Yan Li, Dong Liang, Maolan Zhang, and Da Sun. "Study on the Algae Lysis Method of White Rot Fungi Algae Control System." Water 14, no. 6 (March 14, 2022): 903. http://dx.doi.org/10.3390/w14060903.
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At present, there are few studies on known bacterial species and even less on fungi in biological algae control technology. In this paper, the green eutrophic shallow water lake Scenedesmus quadricauda (Turpin) was used as the research object, and white rot fungi, which has a high removal effect on water pollutants, algae and biological toxins, was used for algae control. The extent of the removal effect, physiological characteristics and the internal functional groups of the algae cells in the white rot fungi solution, the supernatant of the white rot fungi solution after centrifugation and the sterilized white rot fungi solution were investigated. The results showed that the best algae solubilization effect of the algae control system was achieved at 250 mg/L, with 8 mg/L of dissolved oxygen and a hydraulic retention time of 48 h. The average algae lysis rate was 85.48%, the average dehydrogenase activity reduction rate was 59.23%, the average soluble protein reduction rate was 65.16% and the average malondialdehyde content increased to 0.128 umol/L. After treatment with the white rot algae control system, the spatial structure of the Turpin cells was severely disrupted, and significant lysis occurred within the algal cells, forcing the release of intracellularly soluble substances, and reducing the dehydrogenase activity of the Turpin cells, thus inhibiting the growth activity of the algae cells. A further reduction in the soluble protein content reduces the nutrients required for the growth of Turpin, exacerbating the rate of reduction in the physiological metabolic activity of the Turpin cells and, ultimately, the inhibition or killing of the algal cells. The results of this research may provide theoretical guidance for the microbial control of water eutrophication; however, whether there will be secondary pollution after the algae dissolution of this process is worthy of further study.
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De Obeso Fernandez Del Valle, Alvaro, and Christian Quintus Scheckhuber. "From Past to Present: Biotechnology in Mexico Using Algae and Fungi." Plants 10, no. 11 (November 20, 2021): 2530. http://dx.doi.org/10.3390/plants10112530.
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Algae and fungi share a rich history in the fields of basic and applied natural science. In biotechnology, in particular, algae and fungi are of paramount importance, due to the production and development of valuable compounds, such as pharmaceuticals, enzymes, and biofuels. They are also used in waste fermentation, biocontrol of pathogens, and food processing and improvement, among other fields. Although a substantial number of different microorganisms are utilized for these purposes, there lies tremendous potential in uncharacterized microbial species. For this reason, biodiversity hotspots offer a wealth of potential in the discovery of new products and processing strategies based on these microorganisms. This review presents an overview of the use of algae and fungi in pre-Hispanic times/modern-day Mexico for the benefits of mankind. One of our objectives is to raise awareness about the potential of developing research projects for identification and biotechnological utilization of algae and fungi in a megadiverse country, such as Mexico.
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Nazar, F. N., T. K. Weerasinghe, and S. Perera. "A Preliminary Study on the Resistance of Paints against the Growth of Algae and Fungi." Advanced Materials Research 746 (August 2013): 186–91. http://dx.doi.org/10.4028/www.scientific.net/amr.746.186.
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Paints are widely used to colour and protect various surfaces. Paints contain many substances to improve their quality as well as to protect the surface from environmental hazards. One of the most concerned environmental hazards is the contamination of wall surfaces by algae and fungi. According to manufacturers of paints in Sri Lanka, this issue has been looked after by incorporating many biocides to the paints available in the market. However, the testing of existing paints for their biocidal activity using standards is very important and not yet done in Sri Lanka. Therefore, the objective of the present work was to find out the possibility of implementing a standard test method (ASTM) to detect the biocidal action of paints and to assess the biocidal effect of paints available in the Sri Lankan market. Standard Test Method for Fungi (D5590) and Algae (D5589) were tested with local paints using three fungi and three algae as test organisms. Both test methods and organisms being tested are effective in deciding the biocidal activity of paints. It is very clear from the results that the biocidal chemicals used in commercial paints are effective on most common fungi (mainly spores) and algae present in the air. However, on average, 7.8% fungal growth and 6.7% of Algal growth were observed under laboratory conditions. The Paints which had the lowest biocidal activity allowed 13.8% fungal growth and 20.6% of Algal growth and paints which had the best biocidal activity showed 100% of no growth. Aspergillus had an ability to grow fast by tolerating the biocidal activity of some paints which had different ranges of resistance on other organisms. However, Algae showed slower growth than Fungi on all paints. Growth of Algae or Fungi mainly depends on growing ability of microbes, biocidal activity of paints and favourable environmental conditions.
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Patyshakuliyeva, Aleksandrina, Daniel L. Falkoski, Ad Wiebenga, Klaas Timmermans, and Ronald P. de Vries. "Macroalgae Derived Fungi Have High Abilities to Degrade Algal Polymers." Microorganisms 8, no. 1 (December 26, 2019): 52. http://dx.doi.org/10.3390/microorganisms8010052.
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Marine fungi associated with macroalgae are an ecologically important group that have a strong potential for industrial applications. In this study, twenty-two marine fungi isolated from the brown seaweed Fucus sp. were examined for their abilities to produce algal and plant biomass degrading enzymes. Growth of these isolates on brown and green algal biomass revealed a good growth, but no preference for any specific algae. Based on the analysis of enzymatic activities, macroalgae derived fungi were able to produce algae specific and (hemi-)cellulose degrading enzymes both on algal and plant biomass. However, the production of algae specific activities was lower than the production of cellulases and xylanases. These data revealed the presence of different enzymatic approaches for the degradation of algal biomass by macroalgae derived fungi. In addition, the results of the present study indicate our poor understanding of the enzymes involved in algal biomass degradation and the mechanisms of algal carbon source utilization by marine derived fungi.
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IMAMURA, Yuji. "No. 7 Lichen-fungi coexisting with algae." MOKUZAI HOZON (Wood Protection) 47, no. 3 (2021): 138. http://dx.doi.org/10.5990/jwpa.47.138.
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Mukhopadhyay, Jigeesha, and Georg Hausner. "Organellar Introns in Fungi, Algae, and Plants." Cells 10, no. 8 (August 6, 2021): 2001. http://dx.doi.org/10.3390/cells10082001.
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Introns are ubiquitous in eukaryotic genomes and have long been considered as ‘junk RNA’ but the huge energy expenditure in their transcription, removal, and degradation indicate that they may have functional significance and can offer evolutionary advantages. In fungi, plants and algae introns make a significant contribution to the size of the organellar genomes. Organellar introns are classified as catalytic self-splicing introns that can be categorized as either Group I or Group II introns. There are some biases, with Group I introns being more frequently encountered in fungal mitochondrial genomes, whereas among plants Group II introns dominate within the mitochondrial and chloroplast genomes. Organellar introns can encode a variety of proteins, such as maturases, homing endonucleases, reverse transcriptases, and, in some cases, ribosomal proteins, along with other novel open reading frames. Although organellar introns are viewed to be ribozymes, they do interact with various intron- or nuclear genome-encoded protein factors that assist in the intron RNA to fold into competent splicing structures, or facilitate the turn-over of intron RNAs to prevent reverse splicing. Organellar introns are also known to be involved in non-canonical splicing, such as backsplicing and trans-splicing which can result in novel splicing products or, in some instances, compensate for the fragmentation of genes by recombination events. In organellar genomes, Group I and II introns may exist in nested intronic arrangements, such as introns within introns, referred to as twintrons, where splicing of the external intron may be dependent on splicing of the internal intron. These nested or complex introns, with two or three-component intron modules, are being explored as platforms for alternative splicing and their possible function as molecular switches for modulating gene expression which could be potentially applied towards heterologous gene expression. This review explores recent findings on organellar Group I and II introns, focusing on splicing and mobility mechanisms aided by associated intron/nuclear encoded proteins and their potential roles in organellar gene expression and cross talk between nuclear and organellar genomes. Potential application for these types of elements in biotechnology are also discussed.
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Mukhin, V. A., E. N. Patova, I. S. Kiseleva, N. V. Neustroeva, and I. V. Novakovskaya. "Mycetobiont symbiotic algae of wood-decomposing fungi." Russian Journal of Ecology 47, no. 2 (March 2016): 133–37. http://dx.doi.org/10.1134/s1067413616020089.
Full textDissertations / Theses on the topic "Fungi-algae"
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Piotrowska, Agnieszka Anna. "Investigation of STM3071 as a potential regulator of cobalt transport in Salmonella enterica." Thesis, Edinburgh Napier University, 2018. http://researchrepository.napier.ac.uk/Output/1253543.
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Using bioinformatics we have identified stm3071 as a possible regulator of anaerobically induced genes involved in metal homeostasis (Price-Carter et al., 2001) and the aim of this study is to determine the function of stm3071 and define the conditions that induce its expression. Cobalt is required for incorporation into cobalamin (vitamin B12) which is important during S. Typhimurium infection. Vitamin B12 is synthesised de novo under anaerobic conditions and is required for metabolism of 1,2-propanediol and ethanolamine which act as sources of carbon and nitrogen when Salmonella is in the gut (Raux et al., 1996; Thiennimitr et al., 2011). Therefore, sensing Co2+ from the environment, and maintaining Co2+ homeostasis, to avoid metal-mediated toxicity, is required for vitamin B12 biosynthesis. Using λ-red based mutagenesis we have constructed a deletion mutant in order to investigate the function of stm3071. We examined the effect of mutation on the utilisation of 1,2-propanediol under anaerobic conditions and ability to produce vitamin B12. We have also tested the effect of mutation on tolerance to cobalt both aerobically and anaerobically. In order to monitor conditions in which Pstm3071 is switched on, a Pstm3071::lacZ transcriptional fusion was constructed in plasmid pRS415. Levels of β-galactosidase activity were measured in the presence of cobalt in both Δstm3071 and SL1344 (wild type strain) under anaerobic conditions. Anaerobic growth experiments and B12 assays showed that stm3071 is not essential for growth or synthesis of vitamin B12. In addition, cobalt tolerance in both aerobic and anaerobic conditions was unaffected. However, as measured by β-galactosidase assay, our data suggests that Pstm3071 expression is induced in the presence of cobalt in the deletion mutant. In contrast, we observed no difference in expression of Pstm3071 in the presence or absence of cobalt in SL1344.
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Harvey, Robert Jr. "Using PCR Amplification and Genetic Sequence Analysis of 18S rRNA Genes to Survey the Microbial Diversity and Distribution of Eukaryotic Microbes Inhabiting Two Thermo-acidic Streams in Yellowstone National Park, Wyoming." ScholarWorks@UNO, 2009. http://scholarworks.uno.edu/td/978.
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A cultivation-independent approach, sequence analysis of 18S rRNA genes PCR-amplified from environmental DNA, was used to explore the diversity and distribution of eukaryotic microbes inhabiting algal mats in two acidic geothermal streams in Yellowstone National Park. The objectives were to: (1) clarify the identity of mat forming algae in Nymph Creek (2) survey microbial species in the Nymph Creek mat over seasonal intervals along a thermal gradient (3) compare microbial species in the Nymph Creek mat with those in Alluvium Creek mats (4) evaluate microbial species in algal mats formed on different substrates in Alluvium Creek. The results show that a novel red alga dominates high temperature regions (~50ºC) of Nymph Creek and two "Chlorella-like" algae predominate the cooler regions (<38ºC). The predominant algae in Alluvium Creek were distinctly different from those in Nymph Creek. Several stramenophiles and fungi were detected in each algal mat.
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Dias, Daniel Anthony, and danieldias@iprimus com au. "Natural Product Studies of Terrestrial and Marine Organisms." RMIT University. Applied Sciences, 2009. http://adt.lib.rmit.edu.au/adt/public/adt-VIT20091019.161302.
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This thesis describes the isolation and structure elucidation of ten novel secondary metabolites from one fungus (Pycnoporus cinnabarinus), four lichens (Chrysothrix xanthina, Candelaria concolor, Ramalina glaucescens and Xanthoria parietina), three algae (Plocamium mertensii, Laurencia filiformis and Laurencia elata), two plants (Haemodorum simplex and Dianella callicarpa) and one sponge (Dactylospongia sp). The structures of these isolated compounds were elucidated by a combination of spectroscopic and chemical methods. This thesis also reports two new crystal structures, the identification of two new methylsilylated derivatives as well as the isolation of thirty seven previously reported compounds in which the complete structural assignment by one and two dimensional nuclear magnetic resonance spectroscopy (NMR) has been carried out on known compounds with incomplete or no NMR spectroscopic data. Furthermore, detailed spectroscopic analyses resulted in the re assignment of 1H and 13C chemical shifts for several previously isolated natural products. The biological screening (antimicrobial, antiviral and antitumor assays) of crude extracts and isolated natural products has also been presented. The application of chemical profiling techniques including GCxGC and high pressure liquid chromatography-nuclear magnetic resonance (HPLC-NMR) were utilised to assist with the natural product dereplication process (chemical profiling), monitor chemical degradations in situ and to identify the presence of new natural products and artefacts. In total, fifteen separate terrestrial and marine organisms were investigated.
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Mendonça, Iatã do Carmo. "Prospecção química e biológica do endófito Humicola fuscoatra associado a alga vermelha Asparagopsis taxiformis para obtenção de metabólitos secundários bioativos." Universidade Estadual Paulista (UNESP), 2018. http://hdl.handle.net/11449/158311.
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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
Considerando a variedade de compostos encontrados em produtos de origem natural, o estudo da biodiversidade de um país é de interesse tanto científico quanto econômico. Sendo possível destacar os ecossistemas marinhos que apresentam biodiversidade comparável às florestas tropicais. Devido ao ambiente diferenciado, muitas vezes inóspito, os habitantes do ambiente marinho exibem características bioquímicas diferenciadas, mostrando grande potencial para bioprospecção. A importância do estudo de organismos marinhos na busca por metabólitos secundários bioativos levou à proposta de aprofundar a prospecção química do fungo endofítico Humicola fuscoatra, isolado da alga vermelha Asparagopsis taxiformis. A partir de seu extrato foi possível purificar por técnicas cromatográficas, e identificar 7 substâncias com base nos dados de ressonância magnética nuclear uni e bidimensional (RMN de 1H, RMN de 13C, TOCSY-1D, COSY, HSQC, HMBC) e espectrometria de massas (EM). Dentre estes foram identificados um composto da classe das dicetopiperazinas (P01), duas isocumarinas (P02 e P05), além de 4 substâncias não relatadas na literatura, incluindo três valerolactamas (P03, P06 e P07) e uma cicloexadienona (P04). Além dos compostos purificados por CLAE, foi possível identificar duas substâncias por cromatografia a gás acoplada a espectrometria de massas (CG-EM) sendo elas uma dicetopiperazina e um ftalato. A variedade estrutural dos compostos isolados e a grande quimiodiversidade do extrato de Humicola fuscoatra reforçam a necessidade de se realizar estudos químicos de fungos endofíticos de origem marinha, visto que estes são uma fonte de metabólitos com grande potencial para contribuir na busca por protótipos para novos agentes terapêuticos, além de enfatizar a importância da preservação dos biomas aquáticos, sob constante ameaça por impactos ambientais e mudanças climáticas.
Seeing the variety of compounds obtained from natural products, study a country biodiversity have a scientific interest as well as economic. It is possible to highlight marine ecosystems that present biodiversity comparable to rainforests. Due to the unique environment, often inhospitable, the organisms of the marine environments display uncommon biochemical characteristics, showing great potential for bioprospecting. The importance of the study of marine organisms in the search for bioactive compounds led to the proposal to deepen the prospection of the endophytic fungus Humicola fuscoatra, isolated from the red alga Asparagopsis taxiformis. Its extract led to the purification by chromatographic methods, and identification of 7 compounds based on their NMR spectral data obtained by uni and bidimensional experiments (1H NMR, 13C NMR, TOCSY-1D, COSY, HSQC, HMBC) and mass spectrometry (MS). One diketopiperazine (P01), two isocoumarins (P02 and P05) in addition to four novel compounds, including three valerolactams (P03, P06 and P07) and one cyclehexadienone (P04) were isolated. Moreover another diketopiperazine and one phthalate derivative were identified by gas chromatography coupled to mass spectrometry (GC-MS). The structural variety of the identified compounds associated to the rich chemodiversity observed for the Humicola fuscoatra extract reinforces the need to develop additional chemical studies of endophytic fungal strains of marine origin, since they have been providing metabolites with great potential to the development of novel therapeutic agents, in addition to emphasize the importance of aquatic biomes preservation, as they have been continuously threatened by environmental and climate change impacts.
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Honório, Alana Evangelista. "Avaliação química e biológica de fungos endofíticos associados as algas marinhas Acanthophora spicifera, Dichotomaria marginata e Sargassum vulgare /." Araraquara, 2018. http://hdl.handle.net/11449/180427.
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Orientadora: Dulce Helena Siqueira SilvaCoorientador: Alan Cesar Pilon
Banca: Kelly Johana Dussan Medina
Banca: Lidiane Gaspareto Felippe
Banca: Ana Helena Januário
Banca: Paula Christine Jimenez
Resumo: A química de produtos naturais é uma estratégia de grande sucesso na descoberta de compostos bioativos para o desenvolvimento de novos fármacos. Neste contexto destacam-se os estudos com plantas, micro-organismos, e mais recentemente organismos marinhos. Avanços recentes nos estudos com algas marinhas e de seus fungos associados, com destaque para os fungos endofíticos, revelaram bioatividades relevantes, como anti-inflamatória, antioxidante antimicrobiana e antitumoral, além de estruturas químicas diversificadas, incluindo compostos halogenados. Este trabalho explorou o potencial químico e biológico dos endófitos associados às algas A. spicifera, D. marginata e S. vulgare, permitindo o isolamento de 40 linhagens fúngicas e a identificação de doze gêneros e espécies por taxonomia molecular e morfológica. Após isolados, preservados e cultivados no meio líquido extrato de Malte preparado com água do mar ou água ultra pura, foram obtidos os extratos brutos em acetato de etila, que foram avaliados quanto ao perfil químico por RMN de 1H, CLAEDAD, CG-EM e CL-EM, além de triagem biológica em ensaios antimicrobianos contra linhagens de bactérias super-resistentes e formadoras de biofilme, Doença de Chagas, Leishmaniose, bem como em ensaio anticolinesterásico, de inibição da atividade de protease de veneno de serpente e citotóxico frente as linhagens tumorais HCT-116 e MTT. A análise química permitiu a identificação de 78 compostos por CG-EM e 26 por CL-EM. A avaliação biológica dos e... (Resumo completo, clicar acesso eletrônico abaixo)
Abstract: The chemistry of natural products is a highly successful strategy in the discovery of bioactive compounds for the development of new drugs. In this context studies with plants, microorganisms and more recently marine organisms stand out. Recent advances in marine algae studies, along with studies on their associated fungi, with emphasis on endophytic fungi, disclosed relevant bioactivities such as anti-inflammatory, antimicrobial,antitumor and antioxidant, as well as strong chemodiversity, including halogenated compounds. This work explored the chemical and biological potential of endophytes associated to marine algae A. spicifera, D. marginata and S. vulgare andled to the identification of twelve endophytic fungal strains by molecular and morphological taxonomy. After isolation, preservation and cultivation in Malte liquid medium prepared with sea water or ultra pure water, crude extracts were obtained in ethyl acetate, and were evaluated for their chemical profile by 1H NMR, HPLC-DAD, GC-MS and LC-MS, in addition to biological screening against multi-resistant bacterial strains and biofilm-forming bacteria, against Chagas disease, Leishmaniasis, as well as anti-cholinesterase assay, inhibition of snake venom protease activity and cytotoxic activity against human colon adenocarcinoma (HCT-116). Chemical analyses led to the identification of 78 compounds by GC-MS and 26 by LC-MS. Biological evaluation of crude extracts and fractions disclosed a high rate of bioactive samples,... (Complete abstract click electronic access below)
Doutor
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Mouad, Ana Maria. "Biocatalisadores de origem marinha (algas, bactérias e fungos) para redução estereosseletiva de cetonas." Universidade de São Paulo, 2009. http://www.teses.usp.br/teses/disponiveis/75/75131/tde-13112009-144835/.
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Neste trabalho foram realizadas reações de redução de cetonas empregando diferentes organismos marinhos como biocatalisadores (algas, fungos e bactérias). Nas triagens foram utilizados derivados de acetofenonas (o-iodoacetofenona, m-iodoacetofenona, p-iodoacetofenona, o-fluoracetofenona, o-cloroacetofenona, o-bromoacetofenona, o-nitroacetofenona) e duas cetonas 1,3-dicarboniladas: a 4,4,4-triflúor-1-(furan-2-il)butano-1,3-diona e a 4,4,4-triflúor-1-(naftalen-2-il)butano-1,3-diona. As reações com as algas marinhas Bostrychia tenella e a Bostrychia radicans levaram aos álcoois com excelentes seletividades (ee >98%), contudo, obtiveram-se baixas conversões. Foram isoladas as bactérias Bt-01 (B. tenella) e Bt-02 (B. radicans), as quais catalisaram as reduções das acetofenonas com resultados similares aos obtidos com as algas. Os fungos (Br-09, Br-23, Br-27, Br-61) isolados da alga B. radicans reduziram as acetofenonas com boas seletividades e conversões. Ainda, reações de redução das acetofenonas com quatro linhagens de fungos isolados da alga Sargassum sp (SMA2-C, SMA2-8, SMA2-58, SGPY-41) levaram a obtenção dos respectivos álcoois com diferentes conversões e seletividades. As reduções das cetonas 1,3-dicarboniladas foram realizadas com as algas B. tenella e B. radicans, e com sete linhagens de fungos marinhos (Aspergillus sydowii Ce15, Aspergillus sydowii Ce19, Aspergillus sydowii Gc12, Bionectria sp Ce5, Penicillium raistrickii Ce16, Penicillium miczynskii Gc5 e Trichoderma sp Gc1). As algas e os fungos marinhos catalisaram a redução regiosseletiva e estereosseletiva das cetonas 1,3-dicarboniladas, onde ocorreu a redução do grupo α-trifluorcarbonílico. Concluiu-se que as algas e seus microrganismos associados, e os fungos marinhos têm potencial para serem utilizados como biocatalisadores em reações de redução. Este trabalho foi o primeiro estudo realizado no país envolvendo algas marinhas e seus microrganismos associados em reações de redução de cetonas, cujos resultados são bastante promissores.In this work, were investigated the ketone reduction reactions using several marine organisms as biocatalysts (algae, fungi and bacteria). In the screening were utilized acetophenone derivatives (o-iodoacetophenone, m-iodoacetophenone, p-iodoacetophenone, o-fluoroacetophenone, o-chloroacetophenone, o-bromoacetophenone, o-nitroacetophenone) and two 1,3-dicarbonylated compounds: 4,4,4-trifluoro-1-(furan-2-yl)butane-1,3-dione and 4,4,4-trifluoro-1-(naftalen-2-yl)butane-1,3-dione. The reactions with algae Bostrychia tenella and Bostrychia radicans afforded the alcohols with high selectivities (ee > 98%), however, with low conversions. The bacteria Bt-01 and Bt-02 were isolated from algae B. tenella and B. radicans, respectively, which catalyzed the reductions of acetophenones as the same as obtained with the algae. The acetophenones were reduced by several fungi (Br-09, Br-23, Br-27, Br-61) in good selectivities and conversions. These fungi were isolated from Bostrychia radicans. In addition, the acetophenone reduction reactions were screened with four strains of fungi, which were isolated from algae Sargassum sp (SMA2-C, SMA2-8, SMA2-58, SGPY-41). The alcohols were obtained with different conversions and selectivities. The reductions of 1,3-dicarbonylated compounds were carried out with the algae B. tenella and B. radicans, and marine fungi (Aspergillus sydowii Ce15, Aspergillus sydowii Ce19, Aspergillus sydowii Gc12, Bionectria sp Ce5, Penicillium raistrickii Ce16, Penicillium miczynskii Gc5 and Trichoderma sp Gc1). The algae and marine fungi catalyzed regio- and estereoselectively reductions of the 1,3-dicarbonylated compounds. The α-trifluoromethylcarbonyl group was reduced preferentially. In conclusion, the algae and associated micro-organisms and marine fungi have potential for catalyzing ketone reduction reactions. This investigation was the first study carried out in the Brazil by using algae and associated micro-organisms in the ketone reduction reactions. The obtained results here are promising and interesting.
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Fabian, Jenny [Verfasser], Katrin [Akademischer Betreuer] Premke, Hans-Peter [Gutachter] Grossart, Kirsten [Gutachter] Küsel, and Markus [Gutachter] Weitere. "Effects of algae on microbial carbon cycling in freshwaters : with focus on the utilization of leaf carbon by heterotrophic bacteria and fungi / Jenny Fabian ; Gutachter: Hans-Peter Grossart, Kirsten Küsel, Markus Weitere ; Betreuer: Katrin Premke." Potsdam : Universität Potsdam, 2018. http://d-nb.info/1218404299/34.
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Oliveira, Ana Ligia Leandrini de. "Algas e micro-organismos marinhos como fonte de substâncias bioativas: química e biologia de Bostrychia radicans e fungos endofíticos associados." Universidade de São Paulo, 2013. http://www.teses.usp.br/teses/disponiveis/60/60138/tde-05092013-144055/.
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A diversidade de organismos oriundos do ambiente marinho constitui uma fonte significativa de substâncias estruturalmente inéditas e biologicamente ativas, dentre as quais, diversas inspiraram o desenvolvimento de novas classes de agentes terapêuticos. Neste contexto, macroalgas vermelhas do gênero Bostrychia (Rhodomelaceae) foram coletadas em praias do litoral norte do estado de São Paulo e têm sido objeto de estudos químicos e biológicos, no Laboratório de Química Orgânica do Ambiente Marinho (LQOAM - NPPNS) da FCFRPUSP, sob a supervisão da Profa. Dra. Hosana M. Debonsi. As algas da espécie Bostrychia radicans demonstraram potencial quando avaliadas as atividade citotóxica, tripanocida, leishmanicida e antimicrobiana; além de um perfil químico interessante, evidenciado pelo isolamento de substâncias inéditas na literatura. Neste contexto, o presente trabalho descreve a continuidade do estudo químico da espécie B. radicans, coletada no Manguezal do Rio Escuro, em Ubatuba-SP; bem como o potencial biológico desta espécie, além da avaliação da atividade de enzimas fenolsulfatases na espécie. Ainda, no sentido de explorar novas fontes promissoras para o isolamento de substâncias bioativas, este trabalho descreve o isolamento de micro-organismos endofíticos associados à espécie B. radicans. Foram isoladas 45 linhagens de micro-organismos; dentre as quais foram selecionadas nove linhagens para obtenção de extratos e realização de triagens química e biológica. A partir desta triagem inicial, foi realizado o estudo químico dos fungos Xylaria sp., Penicillium brevicompactum e Phomopsis longicolla. A partir da Xylaria sp. foram isoladas as seguintes substâncias: ácido 2,5-diidroxibenzóico, 8-diidroxinaftol 1-O-a-glucopiranosídeo, 8-metóxi-3-metil-1- isocromanona e ácido pilifórmico. O estudo químico de Penicillium brevicompactum resultou no isolamento das substâncias: ácido micofenólico, asperfenamato, brevianamida A, brevianamida C e brevianamida oxindol, substância inédita como produto natural. A partir de Phomopsis longicolla foi isolado o dicerandrol C. Este trabalho descreve ainda o potencial biológico de algumas destas substâncias isoladas. O estudo químico e biológico de microorganismos realizado no LQOAM estimulou a consolidação de uma colaboração com o Prof. Dr. Isidro C. Gonzalez, através da realização de um estágio de 12 meses no Laboratório Botrytis (Departamento de Química Orgânica, Universidade de Cádiz). Durante este período foi realizado o estudo químico do fitopatógeno Botrytis cinerea, visando o isolamento de novos metabólitos ou toxinas; além do estudo da biogênese destas substâncias, através de ensaios utilizando precursores isotopicamente marcados.The diversity of organisms from the marine environment is a significant source of structurally novel and biologically active substances, several of which have inspired the development of new classes of therapeutic agents. In this context, red macroalgae belonging to Bostrychia genus (Rhodomelaceae) were collected on beaches of the north coast of São Paulo State and have been studied chemically and biologically in the Laboratory of Organic Chemistry of the Marine Environment - (LQOAM - NPPNS) at FCFRP-USP, under Prof. Hosana M. Debonsi supervision. Algae Bostrychia radicans species showed cytotoxic, trypanocidal, antileishmanial and antimicrobial potential, besides a interesting chemical profile, evidenced by the isolation of new compounds in the literature. In this context, this work describes the sequential chemical study of B. radicans species, collected at the Rio Escuro Mangrove, Ubatuba-SP, as well as the biological potential of this species. Also, the phenolsulphatases enzyme activity was evaluated in this species. Still, in order to explore new promising sources for the isolation of bioactive substances, this study describes the isolation of endophytic microorganisms associated to B. radicans. In this way, 45 strains of microorganisms were isolated and nine strains were selected for extracts preparation; and subsequently chemical and biological screenings. Based on the biological screening and chemical profile analyses, the large-scale fermentation of the endophytic fungi Xylaria sp., Penicillium brevicompactum and Phomopsis longicolla was carried out. The chromatographic purification of the bioactive acethyl acetate extract from Xylaria sp. allowed the isolation of 2,5-dihydroxybenzoic acid, 8- dihydroxynaphtol 1-O-a-glucopyranoside, 8-methoxy-3-methyl-1-isochromanone and piliformic acid. Chemical studies of Penicillium brevicompactum resulted in the isolation of: mycophenolic acid, asperphenamate, brevianamide A, brevianamide C and brevianamide oxindole, isolated for the first time as a natural product. From Phomopsis longicolla was isolated dicerandrol C. This thesis also describes the potential biological of some of these isolated compounds. The chemical and biological studies of microorganisms achieved in LQOAM encouraged the consolidation of a collaboration work with Prof. Dr. Isidro C. Gonzalez, through the completion of a 12-month internship at the Laboratory Botrytis (Department of Organic Chemistry, University of Cádiz). During this period, was conducted the chemical study of plant pathogen Botrytis cinerea, aiming the isolation of new metabolites or toxins, in addition to studying the biogenesis of these substances, through experiments using isotopically labeled precursors.
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Borderie, Fabien. "Utilisation du rayonnement UV-C comme méthode alternative aux produits chimiques dans la lutte et le contrôle de la prolifération des micro-organismes sur les matériaux du patrimoine." Thesis, Besançon, 2014. http://www.theses.fr/2014BESA2038/document.
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L’objectif général de cette thèse est d’étudier et d’analyser l’effet du rayonnement UV-C comme méthodealternative aux produits chimiques dans la lutte et le contrôle de la prolifération des micro-organismesphotosynthétiques dans les grottes touristiques. Dans un premier temps, l’effet des UV-C a été analysé surdifférentes souches cavernicoles de micro-algues cultivées au laboratoire. Des analyses à l’échelle moléculaire,cellulaire et à l’échelle du biofilm d’algues ont permis de mettre en évidence un ensemble de dommages causépar l’irradiation aux UV-C (diminution de la viabilité et de l’activité photosynthétique, dégradation desmembranes, décoloration des cellules par destruction des pigments chlorophylliens, fragmentation de l’ADN,diminution de la surface d’occupation des biofilms d’algues cultivés sur support solide). Ceux-ci sont soit directs(réactions de photooxydation) soit indirects (liés à un stress oxydatif important). L’ensemble de ces résultats ontservi à la sélection de différentes durées d’exposition aux UV-C (traduites en doses d’UV-C) efficaces en termesd’éradication et de décoloration des micro-algues. Ces doses d’UV-C ont dans un deuxième temps été testées enconditions réelles sur le site d’étude de la grotte des Moidons (Jura, France). Une étude préalable à ces tests a étémenée afin de comprendre les dynamiques et les facteurs favorisant l’installation et la prolifération des biofilmsde micro-organismes photosynthétiques dans la grotte. L’étude des facteurs environnementaux mesurés àl’échelle du biofilm (quantité de lumière, type de support, localisation dans la grotte) ainsi que ceux mesurés àl’échelle de la cavité (circulation horizontale et verticale des eaux, vitesse des courants d’air, temps d’allumagedes lampes et temps de présence des visiteurs) ont permis de distinguer des zones de colonisation préférentielle.Plusieurs biofilms ont ensuite été sélectionnés pour tester l’efficacité des UV-C. Selon les caractéristiques desbiofilms (intensité de colonisation) et en fonction de leur emplacement dans la grotte (variations des facteurspréalablement déterminés), nous avons pu mettre en évidence une efficacité des UV-C variable dans le temps.Avec l’appui de résultats complémentaires obtenus sur deux souches de champignons et sur plusieurs types dematières picturales, l’ensemble des données collectées au cours de la thèse souligne l’intérêt et l’applicabilité destraitements aux UV-C dans divers contextes de conservation des matériaux du patrimoineThe aim of this thesis is to study and analyze the effect of UV-C radiation as an alternative method tochemicals to combat phototrophic microorganisms’ proliferation in show caves. First, the effect of UV-C wasanalyzed on several cave-dwelling unicellular green algae sub-cultured in laboratory conditions. Analysis at themolecular, cellular and biofilm scale highlighted several damages (decrease of viability and photosyntheticactivity, membrane degradation, chlorophyll bleaching, DNA fragmentation, decrease of the biofilms’ colonizedarea…) both direct (photooxydation reaction) or indirect (oxidative stress). These results helped to selectefficient UV-C exposure times (traduced in UV-C doses) both to eradicate and bleach green micro-algae.Second, these efficient UV-C doses were used to test the efficiency of UV-C treatments on natural phototrophicbiofilms proliferating in the Moidons Cave (Jura, France). Previous study to the UV-C tests was performed tounderstand the dynamics and factors that promote algal proliferation in this cave. Factors measured at the biofilmscale (quantity of light, type of the physical support, localization in the cave…) and at the cavity scale(horizontal and vertical circulation of waters, air currents, illumination time and visitors’ presence time) allowedto distinguish several preferential areas where growth-supporting conditions were present for algal proliferation.Then, several biofilms were selected to test the efficiency of UV-C treatments. According to the characteristicsof the biofilms (colonization intensity) and their localization in the cave (variations of the factors promotingcolonization) UV-C efficiency varied over time. Supplementary results obtained on filamentous fungi andmineral pigments used for prehistoric paintings, emphasize the interest and the applicability
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Ragon, Marie. "Diversité et processus de colonisation microbienne sur des substrats minéraux." Phd thesis, Université Paris Sud - Paris XI, 2011. http://tel.archives-ouvertes.fr/tel-00636619.
Full textAbstract:
Mes travaux de recherche ont eu pour but d'analyser la diversité des microorganismes des trois domaines du vivant présents dans des biofilms phototrophes exposés à l'air, se développant sur des substrats minéraux divers, afin d'essayer, d'une part, de répondre à des questions de diversité et de biogéographie et, d'autre part, d'étudier le processus de colonisation par le biais d'expériences d'exposition contrôlées.J'ai ainsi caractérisé, essentiellement par des approches moléculaires basées sur l'analyse des banques des gènes d'ARNr de la petite sous-unité (SSU rDNAs) et sur des analyses d'empreintes communautaires, la diversité microbienne (procaryote et eucaryote) formant des biofilms matures (exposés depuis plusieurs années) dans plusieurs sites géographiques en Irlande du Nord, en France et en Ukraine, dans la région de Chernobyl. Dans ces biofilms soumis à forte pression sélective, nous avons mis en évidence beaucoup de microorganismes hétérotrophes et phototrophes, mais avec une diversité relativement restreinte en comparaison à d'autres milieux comme les sols ou les systèmes aquatiques. Les archées étaient absentes. Les conditions environnementales auxquelles ce type de biofilm est constamment exposé comme l'irradiation, la dessiccation et la limitation des nutriments sélectionnent des microorganismes qui développent des stratégies pour s'adapter comme, entre autres, la production de pigments. Ce sont des microorganismes fréquemment retrouvés dans des milieux désertiques extrêmes et résistants aussi aux radiations ionisantes qui ont ainsi été identifiés, notamment des Deinococcales et des Actinobacteria, ou encore des champignons ascomycètes (Ascomycota). Parmi les organismes phototrophes, nous avons dénombré des Cyanobacteria, des algues vertes (Chlorophyta) et des Streptophyta. Nous avons mis en évidence que les facteurs environnementaux influencent la composition des biofilms. Toutefois, tandis que la composition de la communauté bactérienne est fortement dépendante de la nature du substrat ou elle se développe, la composition des communautés microbiennes eucaryotes dépend de la distance géographique. Nous avons également mené des expériences de colonisation en exposant un même substrat minéral dans trois sites géographiques en Irlande du Nord et en France. L'analyse de la diversité microbienne lors du processus de colonisation a révélé des changements importants dans la composition des communautés, que ce soit pour les procaryotes ou pour les eucaryotes avec, cependant, des comportements différents de ces deux groupes de microorganismes. Dans le cas des bactéries, on observe une transition des Gammaproteobacteria, qui dominent les temps 0-6 mois et qui correspondent vraisemblablement aux cellules inactives en dispersion, vers des Betaproteobacteria, Bacteroidetes, Alphaproteobacteria et Actinobacteria dans des phases successives de formation du biofilm. Par contre, dès leur détection sur le substrat minéral, les eucaryotes sont massivement dominés par des champignons ascomycètes et basidiomycètes, des algues vertes ainsi que d'autres composantes minoritaires comme des ciliés, étant détectées dans des stades plus tardifs. Nos résultats montrent que les organismes hétérotrophes sont pionniers dans la formation de ces biofilms, ce qui permet d'émettre l'hypothèse qu'ils facilitent l'installation des cyanobactéries et surtout des algues vertes. Ils montrent aussi que le processus d'assemblage des communautés bactériennes dépend du temps de colonisation, alors que le site géographique détermine celui des microorganismes eucaryotes. Ces différences majeures de comportement pourraient être expliquées par des modes de vie différents entre les organismes de ces deux grands groupes.
Books on the topic "Fungi-algae"
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Rogers, Kara. Fungi, algae, and protists. New York, NY: Britannica Educational Pub. in association with Rosen Educational Services, 2011.
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90, Sol. Plants, Algae and Fungi. 2nd ed. Chicago: Encyclopaedia Britannica, Inc., 2011.
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Rogers, Kara. Fungi, algae, and protists. New York, NY: Britannica Educational Pub. in association with Rosen Educational Services, 2011.
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McKenzie, Eric H. C. The fungi, bacteria and pathogenic algae of the Federated States of Micronesia. Noumea, New Caledonia: South Pacific Commission, 1990.
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McKenzie, Eric H. C. The fungi, bacteria and pathogenic algae of the republic of Palau. Noumea, New Caledonia: South Pacific Commission, 1990.
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Elvebakk, Arve, and Pål Prestrud. A catalogue of Svalbard plants, fungi, algae, and cyanobacteria. Oslo: Norsk polarinstitutt, 1996.
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McKenzie, Eric H. C. Fungi, bacteria, and pathogenic algae on plants in American Samoa. Noumea, New Caledonia: South Pacific Commission, 1996.
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Saunders, Janet. Gene expression in algae and fungi including yeast: January 1991 - November 1992. Beltsville, Md: National Agricultural Library, 1993.
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Warmbrodt, Robert D. Gene expression in algae and fungi including yeast: January 1988 - March 1991. Beltsville, Md: National Agricultural Library, 1991.
Find full textBook chapters on the topic "Fungi-algae"
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Chapman, Russell L., and Melanie R. Chapman. "Green Algae and Fungi in Lichens:." In Cellular Origin, Life in Extreme Habitats and Astrobiology, 547–55. Dordrecht: Springer Netherlands, 2010. http://dx.doi.org/10.1007/978-90-481-9449-0_28.
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Büdel, B., U. Becker, G. Follmann, and K. Sterflinger. "Algae, Fungi, and Lichens on Inselbergs." In Inselbergs, 69–90. Berlin, Heidelberg: Springer Berlin Heidelberg, 2000. http://dx.doi.org/10.1007/978-3-642-59773-2_5.
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Schweingruber, Fritz H., and Annett Börner. "Coexistence of algae, fungi and vascular plants." In The Plant Stem, 169–71. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-73524-5_11.
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Rees, Paul A. "Protoctists, monerans, fungi, lichens and acellular organisms." In Key questions in biodiversity: a study and revision guide, 33–49. Wallingford: CABI, 2021. http://dx.doi.org/10.1079/9781789248630.0003.
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Abstract This chapter contains questions about the classification and characteristics of a wide range of organisms including prokaryotes, protozoa, algae, slime molds, fungi, lichens and disease-causing microbes such as viruses and prions. The questions are divided into three levels: foundation, intermediate and advanced.
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Gimmler, Hartmut. "Mutualistic Relationships Between Algae and Fungi (Excluding Lichens)." In Progress in Botany, 194–214. Berlin, Heidelberg: Springer Berlin Heidelberg, 2001. http://dx.doi.org/10.1007/978-3-642-56849-7_10.
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Kates, Morris. "Glycolipids of Higher Plants, Algae, Yeasts, and Fungi." In Glycolipids, Phosphoglycolipids, and Sulfoglycolipids, 235–320. Boston, MA: Springer US, 1990. http://dx.doi.org/10.1007/978-1-4899-2516-9_3.
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Bhattacharjya, Raya, Ajima Begum, and Archana Tiwari. "Role of Algae–Fungi Relationship in Sustainable Agriculture." In Fungal Biology, 227–54. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-45971-0_10.
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Ochiai, Ei-Ichiro. "Metabolism of Elements by Bacteria, Fungi, Algae, and Plants." In General Principles of Biochemistry of the Elements, 303–19. Boston, MA: Springer US, 1987. http://dx.doi.org/10.1007/978-1-4684-5371-3_11.
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Subramanian, Vasuki, P. Anantharaman, and K. Kathiresan. "Bioactive Natural Products of Endophytic Fungi from Marine Algae." In Marine OMICS, 383–405. Taylor & Francis Group, 6000 Broken Sound Parkway NW, Suite 300, Boca Raton, FL 33487-2742: CRC Press, 2016. http://dx.doi.org/10.1201/9781315372303-21.
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Rogers, Scott O., and Arnold J. Bendich. "Extraction of total cellular DNA from plants, algae and fungi." In Plant Molecular Biology Manual, 183–90. Dordrecht: Springer Netherlands, 1994. http://dx.doi.org/10.1007/978-94-011-0511-8_12.
Full textConference papers on the topic "Fungi-algae"
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Yang, Xia, Jia Guo, Yu-xin Zhou, Yuan Wu, Hong-qiang Zhang, and Lin Zhang. "Using Impinging Stream to Kill Algae, Fungi and Bacteria in Cooling Water of Thermal Power Plants." In 2011 5th International Conference on Bioinformatics and Biomedical Engineering (iCBBE). IEEE, 2011. http://dx.doi.org/10.1109/icbbe.2011.5781129.
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