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Articoli di riviste sul tema "Algal metabolites in water"

Autore: Grafiati

Pubblicato: 4 giugno 2021

Ultima modifica: 17 febbraio 2022

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1

Ando, A., M. Miwa, M. Kajino, and S. Tatsumi. "Removal of Musty-Odorous Compounds in Water and Retained in Algal Cells through Water Purification Processes." Water Science and Technology 25, no. 2 (1992): 299–306. http://dx.doi.org/10.2166/wst.1992.0065.

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Abstract (sommario):

Musty-odorous compounds, metabolites of some species of blue-green algae, are usually contained in both the water and algal cell bodies. The compounds in the latter solid phase were found to be easily removed by coagulation and sedimentation without breakpoint prechlorination (intermediate chlorination used instead). Chlorination of the algae results in an artificial release of the metabolite content into the surrounding water. When a large fraction of the compounds was present in the algal cell bodies, more than 60% of these compounds were removed in the intermediate-chlorination treatment. P

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2

Jorissen, Hendrikje, Christina Skinner, Ronald Osinga, Dirk de Beer, and Maggy M. Nugues. "Evidence for water-mediated mechanisms in coral–algal interactions." Proceedings of the Royal Society B: Biological Sciences 283, no. 1836 (2016): 20161137. http://dx.doi.org/10.1098/rspb.2016.1137.

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Although many coral reefs have shifted from coral-to-algal dominance, the consequence of such a transition for coral–algal interactions and their underlying mechanisms remain poorly understood. At the microscale, it is unclear how diffusive boundary layers (DBLs) and surface oxygen concentrations at the coral–algal interface vary with algal competitors and competitiveness. Using field observations and microsensor measurements in a flow chamber, we show that coral (massive Porites ) interfaces with thick turf algae, macroalgae, and cyanobacteria, which are successful competitors against coral i

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3

Wang, Di, Liling Xie, Xingbiao Zhu, Xiao Bi, Yuzhong Zheng, and Yankun Zhu. "Study on the metabolites of DH-e, a Halomonas marine bacterium, against three toxic dinoflagellate species." Water Science and Technology 78, no. 7 (2018): 1535–44. http://dx.doi.org/10.2166/wst.2018.426.

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Abstract Algicidal bacteria play an important role in mitigating harmful algal blooms (HABs). In the study, five bacterial strains were isolated from the East China Sea. One strain of algicidal bacterium, named DH-e, was found to selectively inhibit the motor ability of Prorocentrum donghaiense, Alexandrium tamarense (ATDH-47) and Karenia mikimotoi Hansen. Both 16S rDNA sequence analysis and morphological characteristics revealed that the algicidal DH-e bacterium belonged to Halomonas. Furthermore, results showed that the metabolites in the DH-e cell-free filtrate could kill algae directly, an

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4

Xu, Qiuyang, Meixue Shi, Shaohua Wang, and Yuchun Qing. "Study on the Effect of Exogenous Salicylic Acid on Algae Growth in the Environment." E3S Web of Conferences 165 (2020): 02001. http://dx.doi.org/10.1051/e3sconf/202016502001.

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With the development of industry, synthetic drugs and their secondary metabolites bring some hidden dangers to environmental safety. As an excellent drug, salicylic acid is widely used in cardiovascular drugs, industrial dyes, skin care and acne products, etc. Therefore, it is possible to detect salicylic acid molecules, its derivatives or secondary metabolites in the natural environment. It should be noted that salicylic acid, as an endogenous signal molecule, can greatly affect plant growth. In this study, the common algal Spirogyra in fresh water was taken as the research object. The effect

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5

Ho, L., D. Hoefel, W. Aunkofer, et al. "Biological filtration for the removal of algal metabolites from drinking water." Water Supply 6, no. 2 (2006): 153–59. http://dx.doi.org/10.2166/ws.2006.064.

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Biological sand filters were assessed for their ability to remove geosmin, 2-methylisoborneol (MIB) and microcystin-LR. Microcystin-LR was the most readily degradable metabolite with a maximum lag period of only 5 days before it was undetected in the filter effluent. Geosmin and MIB were difficult to degrade, with a period in excess of 75 days before greater than 95% removal was achieved. A microcystin-degrading gene was detected in the biofilm from one of the filters, confirming that the biofilm possessed the ability to degrade microcystin. A Sphingomonas sp. was identified as a potential geo

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6

Cotsaris, E., A. Bruchet, J. Mallevialle, and D. B. Bursill. "The identification of odorous metabolites produced from algal monocultures." Water Science and Technology 31, no. 11 (1995): 251–58. http://dx.doi.org/10.2166/wst.1995.0443.

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Four algal species commonly found in the River Seine were cultured for a comprehensive investigation of their odorous metabolites. Closed loop stripping analysis (CLSA), open stripping analysis (OSA) and steam distillation extraction (SDE) were used to extract and concentrate a wide range of metabolites. The odour causing compounds were identified by a combination of chemical (gas chromatography-mass spectrometry (GC-MS)) and sensory (sensory-gas chromatography (sensory-GC), flavour profile analysis (FPA)) analyses. The compounds found responsible for unpleasant odours were alkenes, saturated

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7

Dietrich, A. M., R. C. Hoehn, L. C. Dufresne, L. W. Buffin, D. M. C. Rashash, and B. C. Parker. "Oxidation of odorous and nonodorous algal metabolites by permanganate, chlorine, and chlorine dioxide." Water Science and Technology 31, no. 11 (1995): 223–28. http://dx.doi.org/10.2166/wst.1995.0439.

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The six algal metabolites, at concentrations of 20-225 μg/l, were oxidized with potassium permanganate, chlorine, or chlorine dioxide at doses of 0.25-3 mg/l. Flavor profile analysis (FPA) was used to determine the odors of the solutions before and after oxidation. Linoleic and palmitic acids, which are odorless compounds, were oxidized to odorous products by all three oxidants. The odor intensity of β-cyclocitral (grape, sweet tobacco) and phenethyl alcohol (rose, floral) was only slightly decreased by any of the oxidants. Oxidation by permanganate or chlorine either eliminated or greatly red

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8

Dixon, M. B., C. Falconet, L. Ho, C. W. K. Chow, B. K. O'Neill, and G. Newcombe. "Nanofiltration for the removal of algal metabolites and the effects of fouling." Water Science and Technology 61, no. 5 (2010): 1189–99. http://dx.doi.org/10.2166/wst.2010.903.

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Nanofiltration (NF) has been shown to be an effective way of removing organic micropollutants from drinking water due to its size exclusion properties. A rapid bench scale membrane test unit was utilised to trial six NF membranes to remove the algal metabolites, microcystin, cylindrospermopsin, 2-methylisoborneol (MIB) and geosmin (GSM). Membrane fouling due to the algal metabolites was observed for both charged and neutral metabolites. MIB and GSM were removed effectively by low molecular weight cut-off (MWCO) membranes but less effectively by a higher MWCO membrane. Removal of MIB and GSM by

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9

Pereira, Leonel. "Seaweeds as Source of Bioactive Substances and Skin Care Therapy—Cosmeceuticals, Algotheraphy, and Thalassotherapy." Cosmetics 5, no. 4 (2018): 68. http://dx.doi.org/10.3390/cosmetics5040068.

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Riverine, estuarine, and coastal populations have always used algae in the development of home remedies that were then used to treat diverse health problems. The empirical knowledge of various generations originated these applications, and their mechanism of action is, in most cases, unknown, that is, few more scientific studies would have been described beyond simple collection and ethnographic recording. Nevertheless, recent investigations, carried out with the purpose of analyzing the components and causes that alter the functioning and the balance of our organism, are already giving their

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10

Munir, Mubashrah, Arshad Mahmood, Rahmatullah Qureshi, Sidra Murtaza, and Mehmooda Munazir. "Preliminary Phytochemical Screening, Proximate Analysis, Antioxidant and Antibacterial Activities of an Algal Species of Hydrodictyon Reticulatum." Journal of Bioresource Management 7, no. 4 (2020): 01–26. http://dx.doi.org/10.35691/jbm.0202.0147.

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The freshwater algae grow in a wide range of aquatic habitats across the globe and are rich in secondary metabolites. The present study was designed to conduct the phytochemical screening, proximate analysis, antioxidant and antibacterial activities of water net (Hydrodictyon reticulatum), an algal weed from Pakistan. The pure and dried algal mass was crushed into a fine powder and four solvent-based extracts were used for phytochemical screening. The results of preliminary qualitative screening indicated the presence of flavonoids, phenols, quinones, steroids, resins, anthraquinones, glycosid

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11

Roh, S. H., D. H. Kwak, H. J. Jung, et al. "Simultaneous Removal of Algae and Their Secondary Algal Metabolites from Water by Hybrid System of DAF and PAC Adsorption." Separation Science and Technology 43, no. 1 (2008): 113–31. http://dx.doi.org/10.1080/01496390701764494.

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12

ten Veldhuis, Marie-Claire, Gennady Ananyev, and G. Charles Dismukes. "Symbiosis extended: exchange of photosynthetic O2 and fungal-respired CO2 mutually power metabolism of lichen symbionts." Photosynthesis Research 143, no. 3 (2019): 287–99. http://dx.doi.org/10.1007/s11120-019-00702-0.

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AbstractLichens are a symbiosis between a fungus and one or more photosynthetic microorganisms that enables the symbionts to thrive in places and conditions they could not compete independently. Exchanges of water and sugars between the symbionts are the established mechanisms that support lichen symbiosis. Herein, we present a new linkage between algal photosynthesis and fungal respiration in lichen Flavoparmelia caperata that extends the physiological nature of symbiotic co-dependent metabolisms, mutually boosting energy conversion rates in both symbionts. Measurements of electron transport

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13

Kapkov, V. I., S. G. Vasilieva, and E. S. Lobakova. "SUCCESSION OF CYANOBACTERIA IN BOREAL WATERS." Journal of microbiology epidemiology immunobiology, no. 4 (August 28, 2018): 100–107. http://dx.doi.org/10.36233/0372-9311-2018-4-100-107.

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The in situ investigation of cyanobacterial seasonal succession, causing algal «blooms» in boreal waters, and its dependence on ecological factors was fulfilled. It was revealed that the most important abiotic factors promoting the growth and changes of dominant species in populations are the water temperature, the level of solar radiation and content of cyanobacterial metabolites. The most profound «blooming» with highest biomass and toxic metabolites accumulation occurs during anticyclone type of weather. During such periods cyanobacteria are the most prevalent cultures due to the combinatio

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14

Whitfield, F. B. "Chemistry of Off-Flavours in Marine Organisms." Water Science and Technology 20, no. 8-9 (1988): 63–74. http://dx.doi.org/10.2166/wst.1988.0226.

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Edible marine and fresh-water organisms are occasionally affected by off-flavours and taints. In coastal and estuarine areas near industrial sites the contamination is usually by compounds of industrial origin. However, unpolluted environments can also be a source of off-flavour compounds. For example, earthy/muddy off-flavours are caused by bioaccumulation of metabolites produced during algal blooms. Recent studies have also shown that garlic and iodoform-1ike off-flavours in marine crustacea are caused by compounds which can occur naturally in algae, bryozoa and debris. Compounds derived fro

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15

Zhao, Min, Han Xiao, Dong Sun, and Shunshan Duan. "Investigation of the Inhibitory Effects of Mangrove Leaves and Analysis of Their Active Components on Phaeocystis globosa during Different Stages of Leaf Age." International Journal of Environmental Research and Public Health 15, no. 11 (2018): 2434. http://dx.doi.org/10.3390/ijerph15112434.

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The presence of harmful algal blooms (HABs) can cause significant problems to the quality of the water, the marine ecosystems, and the human health, and economy worldwide. Biological remediation can inhibit harmful algal growth efficiently in an environmental-friendly manner. Therefore, the research conducted on biological remediation with regard to the inhibition of HABs is becoming a major focus in marine ecology. To date, no study has been reported with regard to the red tides occurring in mangrove wetlands. Therefore, the present study used two mangrove species, namely Bruguiera gymnorrhiz

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16

S, Princely, and Dhanaraju Md. "ASSESSMENT OF PHYTOCHEMICAL CONSTITUENTS, IN VITRO ANTIMICROBIAL AND ANTIOXIDANT POTENTIAL OF ULVA EXTRACTS FROM VISHAKHAPATNAM COAST." Asian Journal of Pharmaceutical and Clinical Research 10, no. 8 (2017): 87. http://dx.doi.org/10.22159/ajpcr.2017.v10i8.18582.

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Objective: Antimicrobial drug resistance is the foremost problem faced worldwide with the current antibiotic therapy in treating infectious diseases. Marine algae were considered as a potential source of biologically active compounds with antibacterial, antifungal, antiviral, and anticancer activities.Materials and Methods: In the present investigation, the purified fractions of marine algal crude extracts of different solvents such as aqueous, ethyl acetate (EtAc), and ethanol for antioxidant (1,1-diphenyl-2-picrylhydrazyl radical scavenging assay) and antimicrobial activities (agar well diff

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17

Li, Yueying, C. Benjamin Naman, Kelsey L. Alexander, Huashi Guan, and William H. Gerwick. "The Chemistry, Biochemistry and Pharmacology of Marine Natural Products from Leptolyngbya, a Chemically Endowed Genus of Cyanobacteria." Marine Drugs 18, no. 10 (2020): 508. http://dx.doi.org/10.3390/md18100508.

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Leptolyngbya, a well-known genus of cyanobacteria, is found in various ecological habitats including marine, fresh water, swamps, and rice fields. Species of this genus are associated with many ecological phenomena such as nitrogen fixation, primary productivity through photosynthesis and algal blooms. As a result, there have been a number of investigations of the ecology, natural product chemistry, and biological characteristics of members of this genus. In general, the secondary metabolites of cyanobacteria are considered to be rich sources for drug discovery and development. In this review,

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18

Sukenik, Assaf, and Aaron Kaplan. "Cyanobacterial Harmful Algal Blooms in Aquatic Ecosystems: A Comprehensive Outlook on Current and Emerging Mitigation and Control Approaches." Microorganisms 9, no. 7 (2021): 1472. http://dx.doi.org/10.3390/microorganisms9071472.

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An intensification of toxic cyanobacteria blooms has occurred over the last three decades, severely affecting coastal and lake water quality in many parts of the world. Extensive research is being conducted in an attempt to gain a better understanding of the driving forces that alter the ecological balance in water bodies and of the biological role of the secondary metabolites, toxins included, produced by the cyanobacteria. In the long-term, such knowledge may help to develop the needed procedures to restore the phytoplankton community to the pre-toxic blooms era. In the short-term, the missi

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19

Bruchet, A., and J. P. Duguet. "Role of oxidants and disinfectants on the removal, masking and generation of tastes and odours." Water Science and Technology 49, no. 9 (2004): 297–306. http://dx.doi.org/10.2166/wst.2004.0589.

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This paper summarises the positive and negative effects of the most commonly used oxidants and disinfectants: chlorine, chloramines, chlorine dioxide, potassium permanganate ozone, and advanced oxidation with ozone/hydrogen peroxide on tastes and odours present in natural and drinking waters. The case studies reported illustrate the generation of odorous by-products such as chlorophenols, iodoforms, aldehydes, the masking effect between earthy-musty and chlorinous odours, and the removal of odorous algal metabolites or anthropogenic pollutants by ozone alone or by ozone coupled with hydrogen p

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20

Potocki, Leszek, Bernadetta Oklejewicz, Ewelina Kuna, Ewa Szpyrka, Magdalena Duda, and Janusz Zuczek. "Application of Green Algal Planktochlorella nurekis Biomasses to Modulate Growth of Selected Microbial Species." Molecules 26, no. 13 (2021): 4038. http://dx.doi.org/10.3390/molecules26134038.

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As microalgae are producers of proteins, lipids, polysaccharides, pigments, vitamins and unique secondary metabolites, microalgal biotechnology has gained attention in recent decades. Microalgae can be used for biomass production and to obtain biotechnologically important products. Here, we present the application of a method of producing a natural, biologically active composite obtained from unicellular microalgae of the genus Planktochlorella sp. as a modulator of the growth of microorganisms that can be used in the cosmetics and pharmaceutical industries by exploiting the phenomenon of phot

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21

Kureyshevich, A. V., V. P. Guseynova, and A. I. Sakevich. "Influence of Algal Metabolites on the Quality of Water Depending on the Action of Natural and Anthropic Factors." Hydrobiological Journal 40, no. 2 (2004): 51–65. http://dx.doi.org/10.1615/hydrobj.v40.i2.60.

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Klintzsch, Thomas, Gerald Langer, Gernot Nehrke, Anna Wieland, Katharina Lenhart, and Frank Keppler. "Methane production by three widespread marine phytoplankton species: release rates, precursor compounds, and potential relevance for the environment." Biogeosciences 16, no. 20 (2019): 4129–44. http://dx.doi.org/10.5194/bg-16-4129-2019.

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Abstract. Methane (CH4) production within the oceanic mixed layer is a widespread phenomenon, but the underlying mechanisms are still under debate. Marine algae might contribute to the observed CH4 oversaturation in oxic waters, but so far direct evidence for CH4 production by marine algae has only been provided for the coccolithophore Emiliania huxleyi. In the present study we investigated, next to E. huxleyi, other widespread haptophytes, i.e., Phaeocystis globosa and Chrysochromulina sp. We performed CH4 production and stable carbon isotope measurements and provide unambiguous evidence that

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23

Wang, Shuhang, Wenwen Wang, Junyi Chen, Bo Zhang, Li Zhao, and Xia Jiang. "Characteristics of Dissolved Organic Matter and Its Role in Lake Eutrophication at the Early Stage of Algal Blooms—A Case Study of Lake Taihu, China." Water 12, no. 8 (2020): 2278. http://dx.doi.org/10.3390/w12082278.

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Decaying algal blooms in eutrophic lakes can introduce organic matter into the water and change nutrient concentrations in the water column. The spatial distribution and composition characteristics, sources, and contribution to eutrophication of dissolved organic matter (DOM) in the overlying water of Lake Taihu, a typical eutrophic lake in China, were analyzed by ultraviolet–visible spectra and three-dimensional fluorescence excitation–emission matrix spectra combined with the statistical decomposition technique, parallel factor analysis. The concentration of DOM was represented by dissolved

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Bartual, Ana, and María J. Ortega. "Temperature differentially affects the persistence of polyunsaturated aldehydes in seawater." Environmental Chemistry 10, no. 5 (2013): 403. http://dx.doi.org/10.1071/en13055.

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Environmental context Diatoms, unicellular algae that live suspended in the water column, can undergo periods of rapid growth, called blooms. When these algal blooms die, organic compounds including polyunsaturated aldehydes are released to the surrounding water with currently unknown ecological effects. Here we demonstrate that temperature differentially affects the persistence of three major polyunsaturated aldehydes produced by diatoms, and we quantify the removal rates from seawater of these compounds. Abstract Polyunsaturated aldehydes (PUAs) are volatile compounds commonly released into

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O'Rourke, Rachel, Mark Gaffney, and Richard Murphy. "The effects of Parachlorella kessleri cultivation on brewery wastewater." Water Science and Technology 73, no. 6 (2015): 1401–8. http://dx.doi.org/10.2166/wst.2015.618.

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Bioindustrial wastewaters, often characterised by high carbon and nitrogen contents, have shown promise as a valuable resource for the cultivation of beneficial microorganisms. The purpose of this study was to assess if Parachlorella kessleri could utilise brewery wastewater (Br WW) for growth and production of metabolites. P. kessleri was cultivated on different concentrations of Br WW over 14 days. Higher concentrations of Br WW led to an approximate two-fold increase in dry cell weight yielding a maximum of 12.3 g DCW/L. High glucose and nitrogen utilisation was associated with high algal b

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26

Ayele, Abate, Deribe Getachew, M. Kamaraj, and A. Suresh. "Phycoremediation of Synthetic Dyes: An Effective and Eco-Friendly Algal Technology for the Dye Abatement." Journal of Chemistry 2021 (May 19, 2021): 1–14. http://dx.doi.org/10.1155/2021/9923643.

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Rapid industrialization leads to serious environmental hazards due to the increase in the release of pollutants into the environment. Industries that use synthetic dyes for different applications are a predominant source for dye contaminants by releasing the dye in wastewater with pretreatment or without treatment directly into the water bodies, making serious water pollution in the environment. Therefore, it is imperative to safeguard the environment from such contaminants and their associated negative impacts. The conventional treatment method that is used to treat dye-contaminated wastewate

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McNabb, Paul, Andrew I. Selwood, Patrick T. Holland, et al. "Multiresidue Method for Determination of Algal Toxins in Shellfish: Single-Laboratory Validation and Interlaboratory Study." Journal of AOAC INTERNATIONAL 88, no. 3 (2005): 761–72. http://dx.doi.org/10.1093/jaoac/88.3.761.

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Abstract A method that uses liquid chromatography with tandem mass spectrometry (LC/MS/MS) has been developed for the highly sensitive and specific determination of amnesic shellfish poisoning toxins, diarrhetic shellfish poisoning toxins, and other lipophilic algal toxins and metabolites in shellfish. The method was subjected to a full single-laboratory validation and a limited interlaboratory study. Tissue homogenates are blended with methanol-water (9 + 1), and the centrifuged extract is cleaned up with a hexane wash. LC/MS/MS (triple quadrupole) is used for quantitative analysis with rever

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Rawn, Dorothea F. K., Benjamin P.-Y. Lau, Barbara Niedzwiadek, and James F. Lawrence. "Improved Method for the Determination of Anatoxin-a and Two of Its Metabolites in Blue-Green Algae Using Liquid Chromatography with Fluorescence Detection." Journal of AOAC INTERNATIONAL 88, no. 6 (2005): 1741–47. http://dx.doi.org/10.1093/jaoac/88.6.1741.

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Abstract Anatoxin-a, a neurotoxin produced by blue-green algae (BGA) species, can cause death to exposed organisms. In North America, BGA are harvested and sold as food supplements, some of which contain elevated levels of other algal toxins, such as microcystins. Concern that elevated levels of anatoxin-a also may be present in BGA food supplements has led to the development of a simple method to determine the presence of anatoxin-a in BGA. Some researchers have successfully analyzed this compound using liquid chromatography with fluorescence detection by forming a fluorescent derivative with

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Ismail, Mona M., Badriyah S. Alotaibi, and Mostafa M. EL-Sheekh. "Therapeutic Uses of Red Macroalgae." Molecules 25, no. 19 (2020): 4411. http://dx.doi.org/10.3390/molecules25194411.

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Red Seaweed “Rhodophyta” are an important group of macroalgae that include approximately 7000 species. They are a rich source of structurally diverse bioactive constituents, including protein, sulfated polysaccharides, pigments, polyunsaturated fatty acids, vitamins, minerals, and phenolic compounds with nutritional, medical, and industrial importance. Polysaccharides are the main components in the cell wall of red algae and represent about 40–50% of the dry weight, which are extensively utilized in industry and pharmaceutical compounds, due to their thickening and gelling properties. The hydr

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Tsuchiya, Y., and A. Matsumoto. "Identification of Volatile Metabolites Produced by Blue-Green Algae." Water Science and Technology 20, no. 8-9 (1988): 149–55. http://dx.doi.org/10.2166/wst.1988.0236.

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Some of the volatile metabolites of eight species of blue-green algae of the genera Oscillatoria, Phormidium, Aphanizomenon, and Anabaena were identified by gas chromatography mass spectrometry (GC-MS). As a result, five sesquiterpene alcohols (C15H26O) and two sesquiterpene hydrocarbons (germacrene-D and γ-cadi-nene) were detected in the cultures of Oscillatoriasplendida. O. amoena, and Anabaenamacrospora. Three aliphatic hydrocarbons (n-heptadecane,1-heptadecene and 7-methylheptadecane) were also identified in the cultures of most of these algae. None of these compounds appeared to impart an

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Moradinejad, Saber, Caitlin M. Glover, Jacinthe Mailly, et al. "Using Advanced Spectroscopy and Organic Matter Characterization to Evaluate the Impact of Oxidation on Cyanobacteria." Toxins 11, no. 5 (2019): 278. http://dx.doi.org/10.3390/toxins11050278.

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Drinking water treatment plants throughout the world are increasingly facing the presence of toxic cyanobacteria in their source waters. During treatment, the oxidation of cyanobacteria changes cell morphology and can potentially lyse cells, releasing intracellular metabolites. In this study, a combination of techniques was applied to better understand the effect of oxidation with chlorine, ozone, potassium permanganate, and hydrogen peroxide on two cell cultures (Microcystis, Dolichospermum) in Lake Champlain water. The discrepancy observed between flow cytometry cell viability and cell count

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Kambourova, Roumena, Vassya Bankova, and Georgi Petkov. "Volatile Substances of the Green Alga Scenedesmus incrassatulus." Zeitschrift für Naturforschung C 58, no. 3-4 (2003): 187–90. http://dx.doi.org/10.1515/znc-2003-3-408.

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Volatile substances of the green microalga Scenedesmus incrassatulus, cultivated in fresh and salt water, were studied. Cultivation in fresh water diversifies volatile secondary metabolites. Hydrocarbons and derivatives of the acetate pathway predominate when algae are grown in salt water; isoprenoids and aromatics are more abundant after fresh water cultivation.

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He, Chen, Wu, et al. "Distribution Characteristics and Environmental Control Factors of Lipophilic Marine Algal Toxins in Changjiang Estuary and the Adjacent East China Sea." Toxins 11, no. 10 (2019): 596. http://dx.doi.org/10.3390/toxins11100596.

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Abstract (sommario):

Marine algal toxins, highly toxic secondary metabolites, have significant influences on coastal ecosystem health and mariculture safety. The occurrence and environmental control factors of lipophilic marine algal toxins (LMATs) in the surface seawater of the Changjiang estuary (CJE) and the adjacent East China Sea (ECS) were investigated. Pectenotoxin-2 (PTX2), okadaic acid (OA), dinophysistoxin-1(DTX1), and gymnodimine (GYM) were detected in the CJE surface seawater in summer, with concentration ranges of not detected (ND)–105.54 ng/L, ND–13.24 ng/L, ND–5.48 ng/L, and ND–12.95 ng/L, respectiv

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34

Watson, Susan B., Jeff Ridal, and Gregory L. Boyer. "Taste and odour and cyanobacterial toxins: impairment, prediction, and management in the Great Lakes." Canadian Journal of Fisheries and Aquatic Sciences 65, no. 8 (2008): 1779–96. http://dx.doi.org/10.1139/f08-084.

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Abstract (sommario):

This paper reviews the issues associated with algal–cyanobacterial taste–odour (T&O) compounds and toxins in the Great Lakes. As with other remediated water bodies, the Great Lakes have undergone significant shifts in nutrient and food-web regimes and are exhibiting erratic blooms and noxious algal metabolite (NAM) outbreaks, despite reduced offshore nutrient levels. We appraise the chemistry, biota, and distribution of NAM impairments and conclude that management strategies based on lakewide monitoring and remedial action plans are often unsuccessful because they attempt NAM control throu

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35

Ribeiro, Matheus S. F., Andrea Tucci, Matheus P. Matarazzo, Cristina Viana-Niero, and Cristina S. F. Nordi. "Detection of Cyanotoxin-Producing Genes in a Eutrophic Reservoir (Billings Reservoir, São Paulo, Brazil)." Water 12, no. 3 (2020): 903. http://dx.doi.org/10.3390/w12030903.

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Abstract (sommario):

CyanoHABs (cyanobacterial harmful algal blooms) are blooms of cyanobacteria capable of producing cyanotoxins, a large group of secondary metabolites that are toxic to most eukaryotes. In this work, the main aim was to evaluate the presence of multiple genes from each of the clusters responsible for biosynthesis of cyanotoxins (cylindrospermopsin, microcystin and saxitoxin) in total DNA obtained from sixteen environmental water samples by PCR. Microcystin gene mcyE was amplified in all analyzed samples. Among the cylindrospermopsin genes analyzed, only the cyrC gene was amplified from DNA obtai

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36

Schmidt, Wido, Beate Hambsch, and Heike Petzoldt. "Classification of algogenic organic matter concerning its contribution to the bacterial regrowth potential and by-products formation." Water Science and Technology 37, no. 2 (1998): 91–96. http://dx.doi.org/10.2166/wst.1998.0112.

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Abstract (sommario):

The bacterial regrowth potential (BRP) and the by-products formation potential after the disinfection (DBP) are parameters recognized to be influenced by the origin of organic matter dissolved in water. A significant difference of the impact of humic compounds and algogenic organic matter (AOM), characteristic for raw waters from reservoirs, to both parameters can be assumed. In systematic laboratory experiments the influence of AOM on the BRP as well as DBP was examined. Different fractions of the AOM were chlorinated and treated with chlorine dioxide. In addition to that the influence of the

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37

Лыскова (Lyskova), Надежда (Nadezhda) Сергеевна (Sergeevna), Юлия (Iuliia) Генриховна (Genrikhovna) Базарнова (Bazarnova), and Игорь (Igor') Вадимович (Vadimovic) Кручина-Богданов (Kruchina-Bogdanov ). "STUDY OF THE COMPOSITION AND PROPERTIES OF SECONDARY METABOLITES OF THE LICHEN USNEA BARBATA." chemistry of plant raw material, no. 1 (October 19, 2017): 121–27. http://dx.doi.org/10.14258/jcprm.2018011966.

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Abstract (sommario):

In the modern society value of many biological resources remains underestimated. Lichens are one of the unique poorly studied bioresources. These are amazing organisms, formed by symbiosis of algae and fungus. Due to this combination, lichens have a number of unique properties.In this article the results of study the composition of biologically active secondary lichen metabolites of the Usnea barbata lichen. Antioxidant activity and antimicrobial properties of dry lichen extract against bacteria Bac. Subtilis. The conditions for extraction of biologically active metabolites using solvent syste

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38

Subbiah, Seenivasan, Adcharee Karnjanapiboonwong, Jonathan D. Maul, Degeng Wang, and Todd A. Anderson. "Monitoring cyanobacterial toxins in a large reservoir: relationships with water quality parameters." PeerJ 7 (July 16, 2019): e7305. http://dx.doi.org/10.7717/peerj.7305.

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Abstract (sommario):

Cyanobacteria are widely distributed in fresh, brackish, and ocean water environments, as well as in soil and on moist surfaces. Changes in the population of cyanobacteria can be an important indicator of alterations in water quality. Metabolites produced by blooms of cyanobacteria can be harmful, so cell counts are frequently monitored to assess the potential risk from cyanobacterial toxins. A frequent uncertainty in these types of assessments is the lack of strong relationships between cell count numbers and algal toxin concentrations. In an effort to use ion concentrations and other water q

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39

Patin, Nastassia V., Emily Brown, Gabriella Chebli, Claire Garfield, Julia Kubanek, and Frank J. Stewart. "Microbial and chemical dynamics of a toxic dinoflagellate bloom." PeerJ 8 (July 21, 2020): e9493. http://dx.doi.org/10.7717/peerj.9493.

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Abstract (sommario):

Harmful Algal Blooms (HABs) exert considerable ecological and economic damage and are becoming increasingly frequent worldwide. However, the biological factors underlying HABs remain uncertain. Relationships between algae and bacteria may contribute to bloom formation, strength, and duration. We investigated the microbial communities and metabolomes associated with a HAB of the toxic dinoflagellate Karenia brevis off the west coast of Florida in June 2018. Microbial communities and intracellular metabolite pools differed based on both bacterial lifestyle and bloom level, suggesting a complex r

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40

Ma, Xiao-yan, Ze-hua Zhang, Qing-song Li, et al. "Simultaneous removal of algae and its odor metabolites in raw water by potassium ferrate." Desalination and Water Treatment 52, no. 1-3 (2013): 357–64. http://dx.doi.org/10.1080/19443994.2013.785366.

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41

Liu, Tianji, Yitong Wang, Junguo Li, et al. "Effects from Fe, P, Ca, Mg, Zn and Cu in Steel Slag on Growth and Metabolite Accumulation of Microalgae: A Review." Applied Sciences 11, no. 14 (2021): 6589. http://dx.doi.org/10.3390/app11146589.

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Abstract (sommario):

Steel slag is the solid waste produced by the steelmaking process. At present, there are differences in the treatment and utilization of this waste among countries around the world. The massive accumulation of steel slag not only occupies land, but also the heavy metal elements in steel slag leached by rainwater cause serious pollution to the soil and groundwater, both which threaten the life and survival of the surrounding residents. More and more attention has been paid to the resource utilization of slag because of the gradual promotion of energy saving and emission reduction all over the w

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42

Hu, Shi Fei, Xiao Yan Ma, Hong Yu Wang, Jun Li, Jing Huang, and Yun Zhang. "Kinetics on Oxidation of Odor Contaminant-Dimethyl Trisulfide by Potassium Ferrate in Drinking Water." Advanced Materials Research 255-260 (May 2011): 2987–93. http://dx.doi.org/10.4028/www.scientific.net/amr.255-260.2987.

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Abstract (sommario):

Metabolites of alga that will induce disgusting odor into drinking water such as geosmin, 2-methylisoborneol and dimethyl trisulfide, etc. attracted more and more scholar’s attention recently. Dimethyl trisulfide was newly noticed to be criminal of some water supply accidents of unpleasant odor in our country and was found removed effectively by oxidation agents. Batch tests were carried out in this research to investigate reaction kinetics of dimethyl trisulfide oxidized by potassium ferrate in water. Results showed that dimethyl trisulfide can be removed by potassium ferrate and the rate of

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43

Taki, Kazuo, Tatsuhiro Seki, Sakiyori Mononobe, and Kohichi Kato. "Zeta potential measurement on the surface of blue-green algae particles for micro-bubble process." Water Science and Technology 57, no. 1 (2008): 19–25. http://dx.doi.org/10.2166/wst.2008.787.

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Abstract (sommario):

Any kind of blue-green alga produces metabolites of musty substances and toxins. Therefore, it is necessary to remove the blue-green algae, and processing also including nutrient removal is desired for the water quality improvement of eutrophic lakes. The purpose of this study has been to investigate the possibility of a flotation system using a hybrid technique (chemical compounds and electrostatic bridge) applied to raw water containing phytoplankton with high pH of water, and to examine the zeta potential value of phytoplankton surface and the removal efficiency for phytoplankton, ammonia,

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44

Banks, C. J., G. B. Koloskov, A. C. Lock, and S. Heaven. "A computer simulation of the oxygen balance in a cold climate winter storage WSP during the critical spring warm-up period." Water Science and Technology 48, no. 2 (2003): 189–96. http://dx.doi.org/10.2166/wst.2003.0118.

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Abstract (sommario):

The paper considers factors that determine the oxygen balance in extreme climate waste stabilisation ponds during the critical spring warm-up period. At this time BOD load on the pond is a maximum, due to accumulation of wastewater under the ice during the winter. The paper describes the operation of a typical cold climate WSP and the events leading to a balanced steady state system as spring develops into summer. A mathematical model to simulate conditions within a batch fed experimental pond over the transient period is described. To model temperature changes in the water body experimental d

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45

Goddard, Stephen, and Fatma Saif Al-Abri. "Integrated aquaculture in arid environments." Journal of Agricultural and Marine Sciences [JAMS] 23 (January 10, 2019): 52. http://dx.doi.org/10.24200/jams.vol23iss0pp52-57.

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Abstract (sommario):

Around one third of the globe is classified as desert or arid (<200mm rain annually) and most such regions lack food security. Traditional freshwater aquaculture is often a marginal activity and competes with agriculture for limited water resources. Developing technologies offer new opportunities to increase productivity of aquaculture through integration with vegetable production in aquaponic systems and to reduce water requirements through the application of biofloc technology. Aquaponic systems combine aquaculture and hydroponic plant production and are integrated within a re-cycled wate

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46

Goddard, Stephen, and Fatma Saif Al-Abri. "Integrated aquaculture in arid environments." Journal of Agricultural and Marine Sciences [JAMS] 23, no. 1 (2019): 52. http://dx.doi.org/10.24200/jams.vol23iss1pp52-57.

Testo completo

Abstract (sommario):

Around one third of the globe is classified as desert or arid (<200mm rain annually) and most such regions lack food security. Traditional freshwater aquaculture is often a marginal activity and competes with agriculture for limited water resources. Developing technologies offer new opportunities to increase productivity of aquaculture through integration with vegetable production in aquaponic systems and to reduce water requirements through the application of biofloc technology. Aquaponic systems combine aquaculture and hydroponic plant production and are integrated within a re-cycled wate

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47

Boronina, Liudmila, Arkadiy Sokolsky, and Lev Fesenko. "Identification of organic pollutants of water in sources of water supply (on the example of the astrakhan region)." E3S Web of Conferences 135 (2019): 01013. http://dx.doi.org/10.1051/e3sconf/201913501013.

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Abstract (sommario):

In today’s diverse world, one of the most urgent tasks is environmental protection, rational use and reproduction of natural resources, conservation of biological diversity. The problem of clean water is one of the most important places in the solution of this problem because surface waters are the most sensitive natural environment link. Without careful monitoring of the state indicated by the latter, it is impossible to prevent the occurrence of adverse environmental situations, maintain the health of the nation and ensure the quality of life. Based on the results of the analysis of indicato

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48

Yagi, Masakazu. "Musty Odour Problems in Lake Biwa 1982-1987." Water Science and Technology 20, no. 8-9 (1988): 133–42. http://dx.doi.org/10.2166/wst.1988.0234.

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Abstract (sommario):

This paper discusses the results obtained by two research groups investigating the musty odour problem in Lake Biwa during the years 1967 to 1987. The study has shown that the problem is caused by the growth of three species of planktonic blue-green algae in the southern lake. These algae produce as metabolites either 2-methyl-isoborneol (MIB) or geosmin and it is these compounds which give rise to the musty odour. Recently the musty odour problem has expanded from western to eastern part in the southern lake. The occurrence of the problem has also changed from spring to early summer and more

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49

Arc, Erwann, Martina Pichrtová, Ilse Kranner, and Andreas Holzinger. "Pre-akinete formation in Zygnema sp. from polar habitats is associated with metabolite re-arrangement." Journal of Experimental Botany 71, no. 11 (2020): 3314–22. http://dx.doi.org/10.1093/jxb/eraa123.

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Abstract (sommario):

Abstract In streptophytic green algae in the genus Zygnema, pre-akinete formation is considered a key survival strategy under extreme environmental conditions in alpine and polar regions. The transition from young, dividing cells to pre-akinetes is associated with morphological changes and the accumulation of storage products. Understanding the underlying metabolic changes could provide insights into survival strategies in polar habitats. Here, GC-MS-based metabolite profiling was used to study the metabolic signature associated with pre-akinete formation in Zygnema sp. from polar regions unde

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50

Mu, Rui Min, Xue Liang Yuan, and Gui Xia Ma. "Removal Characteristics of Microcystis aeruginosa with One Brevibacillus parabrevis Strain." Advanced Materials Research 113-116 (June 2010): 928–31. http://dx.doi.org/10.4028/www.scientific.net/amr.113-116.928.

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Abstract (sommario):

In this study, one strain of algicidal bacterium H01 was selected from the water body polluted by Microcystis aeruginosa. It had good removal effects on Microcystis aeruginosa and the removal characteristics on Microcystis aeruginosa were studied. The results indicated that the removal efficiency was connected with such factors as temperature and pH. And the experiment on algicidal mechanism indicated that it lysed the algae cells by secreting metabolites. According to the analysis of its physiological characteristics and 16S rDNA gene sequence, the strain H01 was identified as Brevibacillus p

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