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Journal articles on the topic 'Planctonico'

Author: Grafiati

Published: 4 June 2021

Last updated: 11 February 2022

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1

Ŝtrojsová, A., J. Vrba, J. Nedoma, and K. Ŝimek. "Extracellular phosphatase activity of freshwater phytoplankton exposed to different in situ phosphorus concentrations." Marine and Freshwater Research 56, no. 4 (2005): 417. http://dx.doi.org/10.1071/mf04283.

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Extracellular phosphatase production and biomass change were investigated in phytoplankton species transplanted from the phosphorus-limited dam area of a eutrophic reservoir and exposed to the phosphorus-sufficient inflow part and vice versa. Extracellular phosphatase activity was studied using the enzyme-labelled fluorescence (ELF) technique, allowing for direct microscopic detection of enzyme activity and, moreover, its quantification using image cytometry. Several phytoplankton species (e.g. Anabaena planctonica, Microcystis aeruginosa, Fragilaria crotonensis, Ankyra ancora and Planktosphaeria gelatinosa) regulated phosphatase activity according to external phosphorus concentration. On the contrary, picocyanobacteria and several green algae (Coelastrum microporum, Crucigeniella sp., Pediastrum tetras, and Staurastrum planctonicum) did not produce extracellular phosphatases at all. The species-specific extracellular phosphatase activity of F. crotonensis, A. ancora, and P. gelatinosa ranged between 0.02 and 3.5 fmol μm−2 h−1.

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2

Purkrtová, S., H. Turoňová, T. Pilchová, K. Demnerová, and J. Pazlarová. "Resistance of Listeria monocytogenes biofilms to disinfectants 326." Czech Journal of Food Sciences 28, No. 4 (September 6, 2010): 326–32. http://dx.doi.org/10.17221/153/2010-cjfs.

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We studied the optimal conditions for the biofilm development by Listeria monocytogenes on a model system represented by microtiter plates, and also for determined some effective disinfectant agents. Listeria monocytogenes ATCC 13932 and an industrial isolate of Listeria monocytogenes Lm-24 were compared as to their abilities to form biofilms. The starting concentration of the cells leading to the most reproducible results was 0.5 McFarland. The temperatures tested ranged between 8°C to 37°C, the optimal values to form biofilm in buffered peptone water (BPW) with 0.05% glucose were 25°C and 30°C. Under comparable conditions the persistent strain L. monocytogenes Lm-24 constituted more massive biofilm than did the reference strain. The following disinfectants were applied: Savo, Merades Alco, benzalalkonium chloride. A persistent industry in isolate Listeria monocytogenes Lm-24 was used as the model organism for these tests. Benzalalkonium chloride treatment was found to be the most efficient way to damage the biofilm. One minute treatment with 500 mg/l was lethal for the biofilm cells, and that with 125 mg/l for planctonic cells. Savo suppresed the viability of the biofilm cells only by about 20% on average while being lethal for planctonic cells. Merades Alco exhibited only a weak effect on both the biofilm and planctonic cells.

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3

ARAÚJO, TÂNIA MARIA FONSECA, and ALTAIR DE JESUS MACHADO. "Análise Sedimentar e Micropaleontológica (Foraminíferos) de Seções Quaternárias do Talude Continental Superior do Norte da Bahia, Brasil." Pesquisas em Geociências 35, no. 2 (December 31, 2008): 97. http://dx.doi.org/10.22456/1807-9806.17941.

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Sediment from four cores of the north part of the continental upper slope, Bahia State, consist predominantly of siliciclastic mud in its bottom and carbonatic mud in the top of the majority of the studied cores. The sediment color varies from light olive gray to brownish black. The sediments are mainly composed of foraminifera, mollusk fragments, coralline algae debris, plant fragments and quartz grains. The following major foraminifera benthonic species were recorded in the studied cores: Cibicides pseudoungerianus, Bulimina marginata, Amphistegina lessonii, Cassidulina laevigata, Bolivina subaenariensis, Uvigerina peregrina. The following major foraminifera planctonic species are frequent in the cores: Globigerinoides ruber, Globigerina bulloides, Orbulina universa, Globigerinoides trilobus, G. elongatus, Globigerina quinqueloba, Globigerinoides ruber f. pyramidalis. The siliciclastic sediment (higher quartz percentage) in the core bottom, suggests that sedimentation occurred with strong continental influence, indicating proximity to the coast line. The benthonic foraminifera predominance in the bottom cores and the higher planctonic frequency toward the top cores is an indicative of the sea-level oscilation events during Quaternary time.

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4

D.C. Oliveira, Elane, Raquel Castelo-Branco, Luis Silva, Natalina Silva, Joana Azevedo, Vitor Vasconcelos, Silvia Faustino, and Alan Cunha. "First Detection of Microcystin-LR in the Amazon River at the Drinking Water Treatment Plant of the Municipality of Macapá, Brazil." Toxins 11, no. 11 (November 15, 2019): 669. http://dx.doi.org/10.3390/toxins11110669.

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Human poisoning by microcystin has been recorded in many countries, including Brazil, where fatal cases have already occurred. The Amazon River is the main source of drinking water in municipalities such as Macapá, where there is no monitoring of cyanobacteria and cyanotoxins. This study investigated the presence of cyanobacteria and cyanotoxins in samples from a drinking water treatment plant (DWTP) that catches water from the Amazon River. The toxin analyses employed ELISA, LC/MS, and molecular screening for genes involved in the production of cyanotoxins. The sampling was carried out monthly from April 2015 to April 2016 at the intake (raw water) and exit (treated water) of the DWTP. This study reports the first detection of microcystin-LR (MC-LR) in the Amazon River, the world’s largest river, and in its treated water destined for drinking water purposes in Macapá, Brazil. The cyanobacterial density and MC-LR concentration were both low during the year. However, Limnothrix planctonica showed a density peak (± 900 cells mL−1) in the quarter of June–August 2015, when MC-LR was registered (2.1 µg L−1). Statistical analyses indicate that L. planctonica may produce the microcystin.

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5

Ballarin, Loriano, and Lodovico Galleni. "Evidence for planctonic feeding in Götte's larva ofStylochus mediterranem(Turbellaria ‐ Polycladida)." Bolletino di zoologia 54, no. 1 (January 1987): 83–85. http://dx.doi.org/10.1080/11250008709355561.

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6

Spijkerman, Elly, Stephen C. Maberly, and Peter FM Coesel. "Carbon acquisition mechanisms by planktonic desmids and their link to ecological distribution." Canadian Journal of Botany 83, no. 7 (July 1, 2005): 850–58. http://dx.doi.org/10.1139/b05-069.

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To test if different inorganic carbon (Ci) uptake mechanisms underlie the ecological distribution pattern of planktonic desmids, we performed pH-drift experiments with 12 strains, belonging to seven species, originating from lakes of different pH. Staurastrum brachiatum Ralfs and Staurodesmus cuspidatus (Ralfs) Teil. var. curvatus (W. West) Teil., species confined to acidic, soft water habitats, showed remarkably different behavior in the pH drift experiments: S. brachiatum appeared to use CO2 only, whereas Staurodesmus cuspidatus appeared to use HCO3 as well. Staurastrum chaetoceras (Schr.) Smith and Staurastrum planctonicum Teil, species well-known for their abundant occurrence in alkaline waters, were the most effective at using HCO3. Other species, to be encountered in both slightly acidic and slightly alkaline waters, took an intermediate position. Experiments using specific inhibitors suggested that Cosmarium abbreviatum Rac. var. planctonicum W. & G.S. West and S. brachiatum use CO2 by an active CO2 uptake mechanism, whereas S. chaetoceras and Staurodesmus cuspidatus showed an active HCO3 uptake pattern. Most likely, these active uptake mechanisms make use of H+-ATPase, as none of the desmids expressed significant carbonic anhydrase activity. A series of strains of Staurastrum planctonicum isolated from different habitats, all clustered in between the species using HCO3, but no further differentiation was observed. Therefore, desmids cannot be simply characterized as exclusive CO2 users, and the ecological distribution pattern of a desmid species does not unequivocally link to a certain Ci uptake mechanism. Nevertheless, there does appear to be a general ecological link between a species' Ci uptake mechanism and its ecological distribution.Key words: pH drift, desmids, isolate variation, inorganic carbon acquisition.

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7

Siebert, Hans-Michael, Robert Marmulla, and K. Peter Stahmann. "Effect of SDS on planctonic Acidithiobacillus thiooxidans and bioleaching of sand samples." Minerals Engineering 24, no. 11 (September 2011): 1128–31. http://dx.doi.org/10.1016/j.mineng.2011.03.003.

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8

Scharf, Wilfried. "Staurastrum plantonicum and Staurastrum sebladii (Chlorophyta, Desmidiaceae): Modificability, taxonomy and ecology." Algological Studies/Archiv für Hydrobiologie, Supplement Volumes 76 (February 27, 1995): 5–25. http://dx.doi.org/10.1127/algol_stud/76/1995/5.

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9

Le Roux, Frédérique, Mohamed Zouine, Nesrine Chakroun, Johan Binesse, Denis Saulnier, Christiane Bouchier, Nora Zidane, et al. "Genome sequence ofVibrio splendidus: an abundant planctonic marine species with a large genotypic diversity." Environmental Microbiology 11, no. 8 (August 2009): 1959–70. http://dx.doi.org/10.1111/j.1462-2920.2009.01918.x.

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10

Kadłubowska, Joanna Z. "Rare species of fungi parasiting on algae. III." Acta Mycologica 35, no. 1 (August 20, 2014): 25–28. http://dx.doi.org/10.5586/am.2000.002.

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The investigations csrried out on algae revealed the following species of fungi from the order of <i>Chytridialis</i> Hawksworth et al. (1995) parasitizing on algae: <i>Rhizophydium</i> subgulosum, R. ganlosporum, R. planctonicum, Entophlyctis rhizina</i> and <i> Harpochytrium hedinii</i>. These species arc new to Poland. The figure of resting spore of <i>Entophlyctis rhizina</i> is the fint graphic documentation of this species.

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11

Poister, David, Alison Schaefer, Andrew Baert, John Tracey, and Katelyn Richards. "Stimulated rejuvenation of dormant Aulacoseira granulata (Bacillariophyta) by Gloeocystis planctonica (Chlorophyta) in a eutrophic river." Journal of Phycology 51, no. 2 (March 3, 2015): 332–42. http://dx.doi.org/10.1111/jpy.12277.

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12

Kenter, U., U. Zimmermann, and H. Müller. "Grazing rates of the freshwater ciliate Balanion planctonicum determined by flow cytometry." Journal of Plankton Research 18, no. 6 (1996): 1047–53. http://dx.doi.org/10.1093/plankt/18.6.1047.

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13

Ferreira, Krysna Stephanny de Morais, and Carlos Eduardo de Mattos Bicudo. "Criptógamos do Parque Estadual das Fontes do Ipiranga, São Paulo, SP. Algae, 42: Bacillariophyceae (Surirellales)." Hoehnea 44, no. 1 (March 2017): 10–28. http://dx.doi.org/10.1590/2236-8906-34/2016.

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RESUMO O levantamento florístico das Surirellales (Bacillariophyceae) do PEFI, Parque Estadual das Fontes do Ipiranga, São Paulo, SP, Brasil resultou da análise de 28 unidades amostrais. As amostras planctônicas foram coletadas com auxílio de rede de plâncton e as de perifíton pela raspagem de substratos duros ou coleta de macrófitas aquáticas submersas. O material foi oxidado e analisado aos microscópios de luz. Dois gêneros e 15 espécies foram identificados, dos quais nove são novas citações para o PEFI e são: Stenopterobia delicatissima (F.W. Lewis) L.A. Brébisson ex H. van Heurck, S. pelagica F. Hustedt, S. planctonica D. Metzeltin & H. Lange-Bertalot, S. curvula (W. Smith) K. Kramer, Surirella angusta F.T. Kützing, S. guatimalensis C.G. Ehrenberg, S. stalagma M.H. Hohn & J. Hellerman, S. splendida (C.G. Ehrenberg) F.T. Kützing e S. tenera W. Gregory.

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14

Nõges, Peeter. "Seasonal variation in trichome length of cyanophytes Limnothrix planctonica and L. redekei in a large shallow lake." Algological Studies/Archiv für Hydrobiologie, Supplement Volumes 94 (September 16, 1999): 261–74. http://dx.doi.org/10.1127/algol_stud/94/1999/261.

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15

Mujica, Armando, and Maria L. Nava. "Distribucion espacial de larvas de crustaceos decapodos planctonicos en canales orientales de la isla Chiloe, Chile." Latin American Journal of Aquatic Research 38, no. 1 (March 10, 2010): 95–106. http://dx.doi.org/10.3856/vol38-issue1-fulltext-9.

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16

Peng, Hui, Yunguo Liu, Guangming Zeng, Xin Li, and Wei Zhang. "Biosorption of Cu(II) and Zn(II) by intact and pre-treated biomass of Oscillatoria planctonica." International Journal of Environment and Pollution 38, no. 1/2 (2009): 1. http://dx.doi.org/10.1504/ijep.2009.026638.

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17

Tunik, T. V., E. I. Ivanova, E. V. Grigorova, U. M. Nemchenko, and Z. I. Budnikova. "THE CORRELATION BETWEEN BIOFILM-FORMATION ABILITY OF KLEBSIELLA spp. AUTOSTRAINS AND ANTIBIOTIC SENSITIVITY OF PLANCTONIC CELLS." Russian Journal of Infection and Immunity 8, no. 4 (January 16, 2019): 611. http://dx.doi.org/10.15789/2220-7619-2018-4-9.30.

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18

Gajardo, Nathalie, and Margarita Marchant. "Variaciones estacionales de los foraminiferos planctonicos durante 2005 2006 frente a Iquique (20ºS) y Concepcion (36ºS), Chile." Latin American Journal of Aquatic Research 40, no. 2 (July 10, 2012): 376–88. http://dx.doi.org/10.3856/vol40-issue2-fulltext-12.

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19

Bruno, Milena, Danilo Attard Barbini, Elio Pierdominici, Anna Paola Serse, and Alfredo Ioppolo. "Anatoxin-a and a previously unknown toxin in Anabaena planctonica from blooms found in Lake Mulargia (Italy)." Toxicon 32, no. 3 (March 1994): 369–73. http://dx.doi.org/10.1016/0041-0101(94)90089-2.

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20

Bardele, Christian F. "Ultrastructure, morphogenesis, and a discussion of the phylogeny of the prostome ciliate Balanion planctonicum." European Journal of Protistology 35, no. 1 (February 1999): 17–33. http://dx.doi.org/10.1016/s0932-4739(99)80019-4.

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21

Zhong, Zhi-Ping, Ying Liu, Fang Wang, Yu-Guang Zhou, Hong-Can Liu, and Zhi-Pei Liu. "Psychroflexus salis sp. nov. and Psychroflexus planctonicus sp. nov., isolated from a salt lake." International Journal of Systematic and Evolutionary Microbiology 66, no. 1 (January 1, 2016): 125–31. http://dx.doi.org/10.1099/ijsem.0.000687.

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22

MODENUTTI, B. E., and G. L. PÉREZ. "Planktonic ciliates from an oligotrophic South Andean lake, Morenito Lake (Patagonia, Argentina)." Brazilian Journal of Biology 61, no. 3 (August 2001): 389–95. http://dx.doi.org/10.1590/s1519-69842001000300007.

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In this contribution we have studied the planktonic ciliates from Morenito Lake, an oligotrophic lake situated in the South Andes of Argentina. Six species that are new records for South America or Argentina are described and illustrated. Besides, population dynamics of the ciliate species were studied during a spring--summer period. Strobilidium lacustris and Balanion planctonicum were the most abundant species, showing a maximum in mid summer. Paradileptus elephantinus was present all over the period while Urotricha furcata was observed in late summer samples. Strobilidium lacustris and S. humile were found to be occasional species during the studied period. The recorded ciliate assemblage with oligotrichs and prostomates as dominant indicate the oligotrophic condition of the lake.

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23

Chelli-Chentouf, N., A. Tirtouil Meddah, C. Mullie, M. Bouachria, and B. Meddah. "Effect of Mentha viridis L. Extracts on Pathogenic Bacteria Adhesion." Journal of Natural Remedies 15, no. 1 (January 28, 2015): 12. http://dx.doi.org/10.18311/jnr/2015/467.

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Micro-organisms do not always exist in planctonic forms (single cells or small groups). To survive, especially in limiting media, they may adhere to inert or living surfaces. This enables them to multiply within a community protected by an extracellular matrix, thus forming a biofilm which protects them from antimicrobials especially antibiotics. In this paper, the aim of this study was to investigate autoaggregation, co-aggragation, surface hydrophobicity and exopolysaccharides production of different pathogenic bacteria treated with methanolic, hydro-methanolic and aqueous extract of Mentha viridis collected in El Bayadh (South West of Algeria). The qualitative analysis revealed the presence of polyphenols and flavonoids, which were confirmed-by-quantitative-analysis. All extracts showed an antibacterial activity (antiadhesiveness).The percentage of autoaggregation, coaggregation decreased in presence of extract comparing to control. E.coli was hydrophobic while the others hydrophilic. The amount of exopolysaccharides (EPS) produces by bacteria decreased considerably with all extracts comparatively to control (without extracts).

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24

Döhler, Günter, and Irene Biermann. "Effect of u.v.-B irradiance on the response of 15N-nitrate uptake of Lauderia annulate and Synedra planctonica." Journal of Plankton Research 9, no. 5 (1987): 881–90. http://dx.doi.org/10.1093/plankt/9.5.881.

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25

Sluiman, Hans J. "CELL DIVISION IN GLOEOTILOPSIS PLANCTONICA, A NEWLY IDENTIFIED ULVOPHYCEAN ALGA (CHLOROPHYTA) STUDIED BY FREEZE FIXATION AND FREEZE SUBSTITUTION1." Journal of Phycology 27, no. 2 (April 1991): 291–98. http://dx.doi.org/10.1111/j.0022-3646.1991.00291.x.

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26

Antonio Arz, José, and Eustoquio Molina. "Late Campanian and Maastrichtian bitostratigraphy based on planctonic foraminifera from temperate to subtropical latitudes (Spain, France and Tunisia)." Neues Jahrbuch für Geologie und Paläontologie - Abhandlungen 224, no. 2 (May 24, 2002): 161–95. http://dx.doi.org/10.1127/njgpa/224/2002/161.

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27

D’Alessandro, Emmanuel Bezerra, Aline Terra Soares, Dayane Cristina da Costa, Habdias de Araújo Silva Neto, Valéria de Oliveira Fernandes, and Nelson Roberto Antoniosi Filho. "A thermal water microalga: Eutetramorus planctonicus as a promising source of fatty acids and lutein." Journal of Environmental Chemical Engineering 6, no. 5 (October 2018): 6707–13. http://dx.doi.org/10.1016/j.jece.2018.10.038.

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28

Tampubolon, Miduk, Yusni Ikhwan Siregar, and Sofyan Husein Siregar. "Analisis pencemaran antropogenik dan struktur komunitas diatom planktonik sebagai indikator pencemaran perairan di Selat Air Hitam." Jurnal Zona 1, no. 2 (February 14, 2021): 45–51. http://dx.doi.org/10.52364/jz.v1i2.8.

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The present study aimed at identify population characters pollution source which affect water fertily nitrate, phospate, abundance as well as community structure of planctonic diatomae were measured. Nine sampling station of three location were established a long the Selat Air Hitam water. Appearently domestic activity, marine traffic, sago processing plant and community economic had affected on water fertility due to effluent water that entered the water. Nitrate analysis showed a range of 187,5 to 262,5 µg/L mean while phospate consentration appear 28,8- 241,2 µg/L, silicate consentration appear 30,4-32,9 µg/L. Plactonic diatomae abundance came up 2400 to 3800 cell/L of nine genera. Biodiversity index of range (1≤H’≤3), while smiliarity index (0,5≤E≤1) and dominancy index (0,5≤E≤1). Those index indicate nthe Selat Air Hitam waters in a medium pressure, however ecosystem condition is stable. Nitrate, phospate and silicate positively and significantly correlated with diatomae abundance ( p0,05). TSS level appeared 18,33 – 45,00 mg/l and BOD berkisar 3,73 – 5,07 mg/l. Regression analysis showed that nitrate and phospate had a mayor affect to diatomae abundance.

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29

Akselman, Rut. "Quistes planctonicos de dinoficeas en areas de plataforma del atlantico sudoccidental: I. Reporte taxonomico de la família Peridiniaceae ehrenberg." Boletim do Instituto Oceanográfico 35, no. 1 (1987): 17–32. http://dx.doi.org/10.1590/s0373-55241987000100004.

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30

Müller, Helga. "Pseudobalanion planctonicum (Ciliophora, Prostomatida): ecological significance of an algivorous nanociliate in a deep meso-eutrophic lake." Journal of Plankton Research 13, no. 1 (1991): 247–62. http://dx.doi.org/10.1093/plankt/13.1.247.

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31

Coesel, Peter F. M., and Elly Spijkerman. "Growth kinetic characteristics of Staurastrum chaetoceras and Cosmarium abbreviatum var. planctonicum (Desmidiaceae) in a long-term competition experiment." Algological Studies/Archiv für Hydrobiologie, Supplement Volumes 95 (November 24, 1999): 81–88. http://dx.doi.org/10.1127/algol_stud/95/1999/81.

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32

Petrovic, Zoran, N. Puac, G. Malovic, S. Lazovic, D. Maletic, M. Miletic, S. Mojsilovic, P. Milenkovic, and D. Bugarski. "Application of non-equilibrium plasmas in medicine." Journal of the Serbian Chemical Society 77, no. 12 (2012): 1689–99. http://dx.doi.org/10.2298/jsc121020142p.

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We review the potential of plasma medical applications, the connections to nanotechnologies and the results obtained by our group. A special issue in plasma medicine is the development of the plasma sources that would achieve non-equilibrium at atmospheric pressure in atmospheric gas mixture with no or only marginal heating of the gas, and with desired properties and mechanisms that may be controlled. Our studies have shown that control of radicals or chemically active products of the discharge such as ROS (reactive oxygen species) and/or NO may be used to control the growth of the seeds. At the same time specially designed plasma needle and other sources were shown to be efficient to sterilize not only colonies of bacteria but also planctonic samples (microorganisms protected by water) or bio films. Finally we have shown that plasma may induce differentiation of stem cells. Non-equilibrium plasmas may be used in detection of different specific markers in medicine. For example proton transfer mass spectroscopy may be employed in detection of volatile organic compounds without their dissociation and thus as a technique for instantaneous measurement of the presence of markers for numerous diseases.

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33

Fernandes, Sidney, and Carlos Eduardo de Mattos Bicudo. "Criptógamos do Parque Estadual das Fontes do Ipiranga, São Paulo, SP: algas, 26: Chlorophyceae (famílias Chlorococcaceae e Coccomyxaceae)." Hoehnea 36, no. 1 (March 2009): 173–91. http://dx.doi.org/10.1590/s2236-89062009000100011.

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Levantamento florístico das Chlorococcaceae e Coccomyxaceae (Chlorophyceae) do Parque Estadual das Fontes do Ipiranga, Município e Estado de São Paulo, Brasil sudeste. Foram identificados 11 gêneros, 30 espécies e três variedades e uma forma taxonómica que não são as típicas de suas respectivas espécie e variedade. Tetraëdron foi o gênero representado pelo maior número de espécies: oito; e Tetraëdron minimum var. scrobiculatum a espécie que apresentou a maior distribuição geográfica na área do PEFI, ocorrendo em quatro localidades. Ankyra judayi, Apodochloris polymorpha, Characium acuminatum, C. ensiforme, C. ornithocephalum var. adolescens, C. ornithocephalum var. pringsheimii, C. strictum, C. transvaalense, Chlorococcum acidum, C. minutum, Elakatothrix gelatinosa, Keratococcus mucicola, K. suecicus, Schroederia indica, S. spiralis, Tetraëdron gracile, T. minimum var. minimum, T. planctonicum, T. quadrilobatum, T. triangulare, T. trigonum f. trigonum e T. trigonum f. gracile apresentaram as distribuições mais restritas, ocorrendo em uma localidade cada uma.

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34

Sigee, David C., and Ruth Holland. "ELEMENTAL COMPOSITION, CORRELATIONS, AND RATIOS WITHIN A POPULATION OF STAURASTRUM PLANCTONICUM (ZYGNEMATALES): AN X-RAY MICROANALYTICAL STUDY1." Journal of Phycology 33, no. 2 (April 1997): 182–90. http://dx.doi.org/10.1111/j.0022-3646.1997.00182.x.

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35

Collos, Yves, G. Döhler, and I. Biermann. "Production of dissolved organic nitrogen during uptake of nitrate by Synedra planctonica: implications for estimates of new production in the oceans." Journal of Plankton Research 14, no. 8 (1992): 1025–29. http://dx.doi.org/10.1093/plankt/14.8.1025.

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36

Shahina, Mariyam, Asif Hameed, Shih-Yao Lin, Ren-Jye Lee, Maw-Rong Lee, and Chiu-Chung Young. "Gramella planctonica sp. nov., a zeaxanthin-producing bacterium isolated from surface seawater, and emended descriptions of Gramella aestuarii and Gramella echinicola." Antonie van Leeuwenhoek 105, no. 4 (February 13, 2014): 771–79. http://dx.doi.org/10.1007/s10482-014-0133-4.

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37

REFARDT, D., E. U. CANNING, A. MATHIS, S. A. CHENEY, N. J. LAFRANCHI-TRISTEM, and D. EBERT. "Small subunit ribosomal DNA phylogeny of microsporidia that infect Daphnia (Crustacea: Cladocera)." Parasitology 124, no. 4 (April 2002): 381–89. http://dx.doi.org/10.1017/s0031182001001305.

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Glugoides intestinalis, Microsporidium sp., Ordospora colligata, Gurleya vavrai, Larssonia obtusa and Flabelliforma magnivora are microsporidian parasites of planctonic freshwater crustaceans Daphnia spp. We performed a phylogenetic analysis of the small subunit ribosomal DNA which revealed their positions as polyphyletic. G. intestinalis, Microsporidium sp. and O. colligata, which are horizontally transmitted gut parasites with small spores and low virulence, group with different lineages. G. intestinalis is related to 2 microsporidia infecting lepidopterans and to Vittaforma corneae, which has been described as a human pathogen. It is thought that V. corneae may have an invertebrate as its natural host. Microsporidium sp. is a relative of the genera Enterocytozoon and Nucleospora, pathogens of man and fish respectively. O. colligata is the first species found to be closely related to the genus Encephalitozoon, which is comprised of 3 species that are parasites of homeothermic vertebrates. G. vavrai and L. obtusa are sister taxa that branch close to the Amblyosporidae, the only microsporidia with known intermediate hosts. This finding supports the presumption of secondary hosts for G. vavrai and L. obtusa, as it has not been possible to maintain these species in Daphnia in the laboratory. F. magnivora roots deep at the base of the phylum microsporidia with no close relative found so far.

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Barrios, Cesar Alejandro Zamora, S. Nandini, and S. S. S. Sarma. "Effect of crude extracts of Dolichospermum planctonicum on the demography of Plationus patulus (Rotifera) and Ceriodaphnia cornuta (Cladocera)." Ecotoxicology 24, no. 1 (October 10, 2014): 85–93. http://dx.doi.org/10.1007/s10646-014-1358-8.

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Heo, Seok-Mo, Kyoung-Soo Choi, Latif A. Kazim, Molakala S. Reddy, Elaine M. Haase, Frank A. Scannapieco, and Stefan Ruhl. "Host Defense Proteins Derived from Human Saliva Bind to Staphylococcus aureus." Infection and Immunity 81, no. 4 (February 12, 2013): 1364–73. http://dx.doi.org/10.1128/iai.00825-12.

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ABSTRACTProteins in human saliva are thought to modulate bacterial colonization of the oral cavity. Yet, information is sparse on how salivary proteins interact with systemic pathogens that transiently or permanently colonize the oral environment.Staphylococcus aureusis a pathogen that frequently colonizes the oral cavity and can cause respiratory disease in hospitalized patients at risk. Here, we investigated salivary protein binding to this organism upon exposure to saliva as a first step toward understanding the mechanism by which the organism can colonize the oral cavity of vulnerable patients. By using fluorescently labeled saliva and proteomic techniques, we demonstrated selective binding of major salivary components byS. aureusto include DMBT1gp-340, mucin-7, secretory component, immunoglobulin A, immunoglobulin G, S100-A9, and lysozyme C. Biofilm-grownS. aureusstrains bound fewer salivary components than in the planctonic state, particularly less salivary immunoglobulins. A corresponding adhesive component on theS. aureussurface responsible for binding salivary immunoglobulins was identified as staphylococcal protein A (SpA). However, SpA did not mediate binding of nonimmunoglobulin components, including mucin-7, indicating the involvement of additional bacterial surface adhesive components. These findings demonstrate that a limited number of salivary proteins, many of which are associated with various aspects of host defense, selectively bind toS. aureusand lead us to propose a possible role of saliva in colonization of the human mouth by this pathogen.

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Cirés, Samuel, Lars Wörmer, Andreas Ballot, Ramsy Agha, Claudia Wiedner, David Velázquez, María Cristina Casero, and Antonio Quesada. "Phylogeography of Cylindrospermopsin and Paralytic Shellfish Toxin-Producing Nostocales Cyanobacteria from Mediterranean Europe (Spain)." Applied and Environmental Microbiology 80, no. 4 (December 13, 2013): 1359–70. http://dx.doi.org/10.1128/aem.03002-13.

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ABSTRACTPlanktonicNostocalescyanobacteria represent a challenge for microbiological research because of the wide range of cyanotoxins that they synthesize and their invasive behavior, which is presumably enhanced by global warming. To gain insight into the phylogeography of potentially toxicNostocalesfrom Mediterranean Europe, 31 strains ofAnabaena(Anabaena crassa,A. lemmermannii,A. mendotae, andA. planctonica),Aphanizomenon(Aphanizomenon gracile,A. ovalisporum), andCylindrospermopsis raciborskiiwere isolated from 14 freshwater bodies in Spain and polyphasically analyzed for their phylogeography, cyanotoxin production, and the presence of cyanotoxin biosynthesis genes. The potent cytotoxin cylindrospermopsin (CYN) was produced by all 6Aphanizomenon ovalisporumstrains at high levels (5.7 to 9.1 μg CYN mg−1[dry weight]) with low variation between strains (1.5 to 3.9-fold) and a marked extracellular release (19 to 41% dissolved CYN) during exponential growth. Paralytic shellfish poisoning (PSP) neurotoxins (saxitoxin, neosaxitoxin, and decarbamoylsaxitoxin) were detected in 2Aphanizomenon gracilestrains, both containing thesxtAgene. This gene was also amplified in non-PSP toxin-producingAphanizomenon gracileandAphanizomenon ovalisporum. Phylogenetic analyses supported the species identification and confirmed the high similarity of SpanishAnabaenaandAphanizomenonstrains with other European strains. In contrast,Cylindrospermopsis raciborskiifrom Spain grouped together with American strains and was clearly separate from the rest of the European strains, raising questions about the current assumptions of the phylogeography and spreading routes ofC. raciborskii. The present study confirms that the nostocalean genusAphanizomenonis a major source of CYN and PSP toxins in Europe and demonstrates the presence of thesxtAgene in CYN-producingAphanizomenon ovalisporum.

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Kelly, David, Kenneth Budd, and Daniel D. Lefebvre. "Mercury Analysis of Acid- and Alkaline-Reduced Biological Samples: Identification of meta-Cinnabar as the Major Biotransformed Compound in Algae." Applied and Environmental Microbiology 72, no. 1 (January 2006): 361–67. http://dx.doi.org/10.1128/aem.72.1.361-367.2006.

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ABSTRACT The biotransformation of HgII in pH-controlled and aerated algal cultures was investigated. Previous researchers have observed losses in Hg detection in vitro with the addition of cysteine under acid reduction conditions in the presence of SnCl2. They proposed that this was the effect of Hg-thiol complexing. The present study found that cysteine-Hg, protein and nonprotein thiol chelates, and nucleoside chelates of Hg were all fully detectable under acid reduction conditions without previous digestion. Furthermore, organic (R-Hg) mercury compounds could not be detected under either the acid or alkaline reduction conditions, and only β-HgS was detected under alkaline and not under acid SnCl2 reduction conditions. The blue-green alga Limnothrix planctonica biotransformed the bulk of HgII applied as HgCl2 into a form with the analytical properties of β-HgS. Similar results were obtained for the eukaryotic alga Selenastrum minutum. No evidence for the synthesis of organomercurials such as CH3Hg+ was obtained from analysis of either airstream or biomass samples under the aerobic conditions of the study. An analytical procedure that involved both acid and alkaline reduction was developed. It provides the first selective method for the determination of β-HgS in biological samples. Under aerobic conditions, HgII is biotransformed mainly into β-HgS (meta-cinnabar), and this occurs in both prokaryotic and eukaryotic algae. This has important implications with respect to identification of mercury species and cycling in aquatic habitats.

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Lefebvre, Daniel D., David Kelly, and Kenneth Budd. "Biotransformation of Hg(II) by Cyanobacteria." Applied and Environmental Microbiology 73, no. 1 (October 27, 2006): 243–49. http://dx.doi.org/10.1128/aem.01794-06.

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ABSTRACT The biotransformation of Hg(II) by cyanobacteria was investigated under aerobic and pH-controlled culture conditions. Mercury was supplied as HgCl2 in amounts emulating those found under heavily impacted environmental conditions where bioremediation would be appropriate. The analytical procedures used to measure mercury within the culture solution, including that in the cyanobacterial cells, used reduction under both acid and alkaline conditions in the presence of SnCl2. Acid reduction detected free Hg(II) ions and its complexes, whereas alkaline reduction revealed that meta-cinnabar (β-HgS) constituted the major biotransformed and cellularly associated mercury pool. This was true for all investigated species of cyanobacteria: Limnothrix planctonica (Lemm.), Synechococcus leopoldiensis (Racib.) Komarek, and Phormidium limnetica (Lemm.). From the outset of mercury exposure, there was rapid synthesis of β-HgS and Hg(0); however, the production rate for the latter decreased quickly. Inhibitory studies using dimethylfumarate and iodoacetamide to modify intra- and extracellular thiols, respectively, revealed that the former thiol pool was required for the conversion of Hg(II) into β-HgS. In addition, increasing the temperature enhanced the amount of β-HgS produced, with a concomitant decrease in Hg(0) volatilization. These findings suggest that in the environment, cyanobacteria at the air-water interface could act to convert substantial amounts of Hg(II) into β-HgS. Furthermore, the efficiency of conversion into β-HgS by cyanobacteria may lead to the development of applications in the bioremediation of mercury.

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Watanabe, Shin, Naoko Kuroda, and Fumiko Maiwa. "Phylogenetic status of Helicodictyon planctonicum and Desmochloris halophila gen. et comb. nov. and the definition of the class Ulvophyceae (Chlorophyta)." Phycologia 40, no. 5 (September 2001): 421–34. http://dx.doi.org/10.2216/i0031-8884-40-5-421.1.

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Weisse, Thomas, and Angela Frahm. "Direct and indirect impact of two common rotifer species (Keratella spp.) on two abundant ciliate species (Urotricha furcata , Balanion planctonicum )." Freshwater Biology 47, no. 1 (January 11, 2002): 53–64. http://dx.doi.org/10.1046/j.1365-2427.2002.00780.x.

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45

Rendón, Silvia, Tatiana Vanegas, and Pablo C. Tigreros. "Contaminación en la Bahía de Cartagena por agua de lastre de los buques." Boletín Científico CIOH, no. 21 (December 1, 2003): 91–100. http://dx.doi.org/10.26640/22159045.118.

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En Colombia la Dirección General Marítima (DIMAR) a través del Centro de Investigaciones Oceanográficas e Hidrográficas (CIOH), inició un programa de investigación para identificar las especies presentes en las aguas de lastre de los buques que arriban a puerto colombiano. La primera fase del proyecto se ejecutó en el año 2002 y en esta se analizaron muestras provenientes de 12 buques de tráfico internacional que arribaron a la Bahía de Cartagena, determinando el componente bacteriano, fitoplanctónico y zooplanctónico. Los restultados indican la presencia en las aguas de lastre de las bacterias patógenas Escherichia Coli, Pseudomona aeruginosa, Vibro cholerae, Salmonella sp, Proteus mirabilis, Pvulgaris, Enterobacter sp, Klebsiella pneumoniae y Aeromona hydrophillia. Se reportan especies fitoplanctónicas que no hacen parte de la flora típica de la bahía como las diatomeas Chaetoceros messanensis, C.glandazzi, C.tortissimus, Odontella aurita, Hemidiscus cuneiformis, Ditylum brightwelli, Paralia sulcata, Planktoniella sol, Asterionellopsis glacialis y Pseudoeunotia doliolus y el silicoflagelado Dictyocha polyaetis. De igual manera se encontraron especies zooplanctónicas no reportadas como fauna típica para la bahía como los copépodos Eucalanus elongatus, Euterpina acutifrons, Lucicutia clausi, Oithoma ovalis y O.plumifera, el chaetognato Sagitta planctonis y el decápodo Lucifer typus.

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Ado, G., and L. A. Sani. "Screening of some algal species for adsorption of iron, copper and mercury from untreated textile effluent in Kano, Nigeria." Bayero Journal of Pure and Applied Sciences 11, no. 1 (October 11, 2018): 52–56. http://dx.doi.org/10.4314/bajopas.v11i1.10.

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The research was carried out to screen endogenous species of algae for the adsorption of heavy metals from untreated effluents of Africa Textile Manufacturer (ATM) in Kano between July 2014- June, 2015. Primary field investigation and laboratory analysis were the main sources of data in the study. The study areas were divided into three strata within which samples were collected using stratified sampling techniques from a depth of 0-30cm. The study assessed the adsorption capacity of heavy metals namely: Iron (Fe), Copper (Cu) and Mercury (Hg) by some algal species using Atomic Absorbance Spectrophotometer (AAS). Indigenous algal species identified and isolated were Anabaena planctonica, Microcystis aeruginosa and Spirulina major using microscopy and standard phycological chart as described by Komerak and Anagnostidis, (1989). Bioremediation Bioassay was conducted to assess the adsorption capacity of the isolated organisms. The results showed that, tested organisms reduced the concentration level of heavy metals in the effluents to the standard limit proposed by FEPA (1997), WHO (1999) and (ICLARM, 1997). Spirulina major was found to sequester more Cu (22.80%) followed by Microcystis aeruginosa (21.34%). Higher concentration of Fe (5.77%) and Hg (5.15%) were removed by Microcystis aeruginosa. These findings indicated that all the tested organisms possessed great potential in removing heavy metals from untreated textile effluents. These findings also showed that adsorption of heavy metals by the tested organisms increased with time from 3-9 weeks of inoculation and adsorption was significantly higher at 9 weeks after inoculation.Keywords: Algal Species, ATM, Effluent and Heavy metals

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Cavalcante, Elcliane Da Costa, Silvia Maria Mathes Faustino, Luís Maurício Abdon da Silva, Alan Cavalcanti da Cunha, and Elane Domênica Cunha de Oliveira. "Monitoramento do fitoplâncton na água bruta da ETA Macapá e inferências sobre a covid-19." Revista Ibero-Americana de Ciências Ambientais 12, no. 3 (January 14, 2021): 664–78. http://dx.doi.org/10.6008/cbpc2179-6858.2021.003.0053.

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O fitoplâncton é formado por microalgas e cianobactérias, fornecedores de oxigênio para o meio aquático. Em ecossistemas desequilibrados esses organismos podem se multiplicar e produzir toxinas que afetam a saúde humana e animal. Este estudo teve como objetivo identificar padrões de densidade no fitoplâncton da água bruta da ETAm e relacionar a influência de fatores físicos, químicos e ambientais sobre a densidade das espécies. As amostragens foram realizadas entre maio de 2019 e agosto de 2020 (exceto em março-maio/2020, devido ao isolamento social). Foram identificados 86 táxons: Bacillariophyta (45), Cyanophyta (18), Chlorophyta (10), Charophyta (10), Dinophyta (1), Euglenophyta (1) e Rhodophyta (1), sendo as cianobactérias e diatomáceas os grupos mais abundantes. E as espécies mais abundantes foram Aulacoseira granulata e Limnothrix planctonica, respectivamente. Em relação à densidade de cianobactérias, observou-se que há padrão de aumento no período maio-agosto similar aos anos anteriores (2015-2016). Porém a densidade de cianobactérias observada neste estudo em 2019 (7083,2 cels. mL-1) foi 7x maior que em anos anteriores (1090 cels.mL-1 em 2015), todavia ainda estão em conformidade com os padrões estabelecidos pelo Ministério da Saúde (<10.000 cels.mL-1). Em junho e julho de 2020, quando era esperado o pico de cianobactérias, ocorreu queda expressiva na densidade. Pode-se inferir que isto ocorreu pela relação entre o aumento do isolamento social em Macapá e a diminuição da abundância de cianobactérias observada neste período de 2020 (R2= 0,94). Quanto à influência dos parâmetros ambientais, a transparência da água foi o parâmetro com maior influência na densidade de cianobactérias.

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48

Coradi Tonon, Caroline, Renata Serignoli Francisconi, Patricia M. Maquera Huacho, Marília Ferreira Correia, Ester Alves Ferreira Bordini, Janaina de Cássia Orlandi Sardi, and Denise M. Palomari Spolidorio. "Atividade anti fúngica do α-terpinen sobre Candida albicans." Revista Estomatológica Herediana 29, no. 2 (June 28, 2019): 107–14. http://dx.doi.org/10.20453/reh.v29i2.3527.

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Objetivo: avaliar a atividade antifúngica do α- terpinen sobre culturas planctonicas e biofi lme de Candida albicans. Material e Métodos: Primeiramente, foi determinada a Concentração Inibitória Mínima (CIM) e a Concentração Fungicida Mínima (CFM) do α-terpinen sobre microrganismos planctônicos. A Nistatina foi utilizada como controle positivo. Biofi lme de Candida albicans foi desenvolvido e, após o tratamento com diferentes concentrações de α-terpinen, foi quantifi cado em UFC/mL, além da atividade metabólica das células ser avaliada por XTT. Resultados: a menor concentração capaz de inibir o crescimento (CIM) foi 0,2 % para o α-terpinen e 4 μg/mL para a Nistatina. Na CIM, os resultados mostraram que a partir da concentração 0,05 % de α-terpinen e 2 μg/mL de Nistatina houve diminuição de C.albicans quando comparado ao controle. A CFM foi para α-terpinen 0,2 % e Nistatina 8 μg/mL. Na quantifi cação as concentrações efi cazes foram de α-terpinen (0,1%) e Nistatina (128μg/mL), e no teste do XTT, observou-se que α –terpinen (0,1%) e Nistatina (256μg/mL) diminuem a viabilidade quando comparado com o controle. Conclusão: Assim, pode-se afi rmar que α-terpineol pode ser uma alternativa para tratamento de infecções fúngicas.

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Demory, François, Gilles Conesa, Julien Oudet, Habib Mansouri, Philippe Münch, Jean Borgomano, Nicolas Thouveny, Juliette Lamarche, Franck Gisquet, and Lionel Marié. "Magnetostratigraphy and paleoenvironments in shallow-water carbonates: the Oligocene-Miocene sediments of the northern margin of the Liguro-Provençal basin (West Marseille, southeastern France)." Bulletin de la Société Géologique de France 182, no. 1 (January 1, 2011): 37–55. http://dx.doi.org/10.2113/gssgfbull.182.1.37.

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Abstract The present study proposes to estimate the influence of climate, eustatism and local tectonics on the sedimentation of a basin margin at the syn-rift to post-rift transition. For that, paleomagnetic measurements were performed on a marine marly-calcareous sedimentary succession ranging from Upper Oligocene to Lower Miocene and located on the northern margin of the Liguro-Provençal basin. The magnetostratigraphic record is correlated to the reference geomagnetic polarity scale [ATNTS04, Lourens et al. 2004] with the help of biostratigraphy based on calcareous nannofossils and planctonic foraminifers [Oudet et al., 2010]. The resulting age model shows that the 100 m-thick sedimentary succession covers a time span of 5 m.y. from the Late Chattian to the Early Burdigalian. Despite several exposure surfaces and a change in the sedimentation rate, no significant hiatus of sedimentation is documented. In addition, we also estimate the paleoenvironmental evolution through the sedimentary succession. Comparing the dated paleoenvironmental reconstruction with global δ18O and sea level curves [Miller et al., 2005], we show that the Carry-le-Rouet succession is an excellent paleoclimatic archive. Indeed, coral reefs developed at the glacial-interglacial stage transition marking the end of the Oligocene. In addition, the most diversified coral reefs occurred during the warmest period of the Aquitanian. During rifting, bathymetric variations recorded in the studied succession are related to local synsedimentary tectonics whereas, during oceanic crust accretion, global sea level changes influence the sedimentation. This result allows to characterise and to accurately date the break-up unconformity at 20.35 Ma.

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Feng, Xi, Jin-Yu Zhang, Jin Sang, Da-Shuai Mu, and Zong-Jun Du. "Mesohalobacter halotolerans gen. nov., sp. nov., isolated from a marine solar saltern." International Journal of Systematic and Evolutionary Microbiology 70, no. 6 (June 1, 2020): 3588–96. http://dx.doi.org/10.1099/ijsem.0.004143.

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A Gram-stain-negative, non-motile, fine rod or short filament shaped, jacinth pigmented bacterium, designated strain WDS2C27T, was isolated from a marine solar saltern in Wendeng, Weihai, PR China (37°31′5″ N, 122°1′47″ E). Growth of WDS2C27T occurred at 20–42 °C (optimum 37 °C) and pH 6.5–8.5 (optimal pH 7.0–8.0). Optimal growth occurred in modified marine broth containing 6 % (w/v) NaCl. The major polar lipids in WDS2C27T were phosphatidylethanolamine, two unidentified aminolipids and one unidentified lipid. The major respiratory quinone of WDS2C27T was MK-6. The dominant fatty acids were iso-C15 : 0 and anteiso-C15 : 0. The DNA G+C content was 35.0 mol%. The nucleotide sequence of the 16S rRNA gene indicated that the most closely related strain was Psychroflexus planctonicus X15M-8T (92.0 % over 1452 bp). WDS2C27T showed 60.7 % average amino acid identity, 55.6 % percentage of conserved proteins, 75.0 % average nucleotide identity and 13.1 % digital DNA–DNA hybridization identity with the type species of the genus Psychroflexus , Psychroflexus torquis ATCC 700755T. The phenotypic and genotypic properties and phylogenetic inference indicated that WDS2C27T could be assigned to a novel species within a novel genus, for which the name Mesohalobacter halotolerans gen. nov., sp. nov. is proposed. Strain WDS2C27T (=MCCC 1H00133T=KCTC 52044T) is the type strain.

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