Zeitschriftenartikel: „Amphora sp“

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Sujarwani, Siyam, Saifuddin Saifuddin und I. Gede Sridana Wisnawa. „TEKNIK PRODUKSI MASSAL Amphora sp. SEBAGAI BAHAN KONSENTRAT UNTUK PAKAN LARVA ABALON (Haliotis squamata)“. Buletin Teknik Litkayasa Akuakultur 14, Nr. 1 (14.11.2016): 33. http://dx.doi.org/10.15578/blta.14.1.2016.33-37.

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Amphora sp. merupakan kelompok bentik diatom bersel tunggal, hidup pada substrat kasar, dapat membentuk koloni, berkelompok membentuk flok, dan sangat banyak ditemukan pada pemeliharaan larva ikan udang dan kekerangan. Kegiatan ini bertujuan untuk memperoleh konsentrat Amphora sp. sebagai pakan larva abalon. Produksi konsentrat dilakukan melalui kultur Amphora sp. skala kecil hingga massal. Konsentrat yang diperoleh melalui pemanenan menggunakan bak volume 100 L disaring menggunakan saringan ukuran 30 µm dan keranjang yang dibuat dengan mengendapkan sel Amphora sp. Konsentrat yang diperoleh disimpan dalam laboratorium dan lemari es. Hasil yang diperoleh menunjukkan bahwa kultur Amphora sp. dengan menggunakan bak ukuran 1 m3 diperoleh kepadatan sel sebesar 75 x 104 - 200 x 104 sel/cm2 dan jumlah konsentrat Amphora sp. sebesar 272,8-882,87 g. Pengembangan pakan alami sebagai bahan konsentrat diharapkan dapat menjamin ketersediaan pakan alami pada proses pembenihan sehingga dapat meningkatkan pertumbuhan dan sintasan benih abalon

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Khumaidi, Ach, und Astik Umiyah. „Potential Antivirus Viral Nervous Necrosis Methanol extract of Amphora sp. in Cantang Grouper (Epinephelus sp.)“. Samakia : Jurnal Ilmu Perikanan 10, Nr. 2 (23.10.2019): 114–20. http://dx.doi.org/10.35316/jsapi.v10i2.538.

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Cantang grouper received more serious attention from grouper fish farmers due to high export interest, but the attack of viral nervous necrosis (VNN) became a major obstacle in its cultivation. This study aims to explore the antiviral potential of diatom Amphora sp. to counter the VNN attack on Cantang groupers. The method used is the extraction of Amphora sp. with absolute methanol solvent. The extraction results were tested in vivo by giving Amphora sp. with different concentrations, namely: 17 µg / ml, 33 μg / ml, 50 μg / ml, and administration of extracts by challenging the 17 μg / ml + VNN, 33 μg / ml + VNN, 50 μg / ml + VNN. Fish treated with Amphora sp. also challenged by giving VNN Positive fish meat. During the period of rearing fish observed clinical behavior and symptoms. After the fish were raised for 15 days, the fish harvested were analyzed using histology, RT-PCR, and CPI methods (using the immuno ratio software) to see the HSP immune response obtained from the administration of Amphora sp. to find out its potential as a natural antivirus. From several test parameters, the concentration of extract 50 mg / ml + VNN was given to give the best response in the CPI analysis with a DAB value (61.3%). These results indicate that the methanol extract of Amphora sp. has the potential to be used as an antiviral candidate in Cantang grouper fish.

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Khumaidi, Ach, Astik Umiyah, Abdul Muqsith und Abdul Wafi. „POTENSI ANTIOKSIDAN EKSTRAK METANOL DIATOM Amphora sp.“ Jurnal Akuakultur Rawa Indonesia 9, Nr. 1 (24.06.2021): 13–21. http://dx.doi.org/10.36706/jari.v9i1.13687.

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Diatoms are a type of microalgae with a quite strong potential in the health sector as antioxidants, anticancer, and antivirals. But until now in Indonesia is still very rarely carried out research on the antioxidant potential of diatoms. The purpose of this study was to determine the antioxidant potential of Amphora sp. extracted with methanol. The method used in the extraction process is maceration, with a ratio of sample and methanol 1: 3 (300 g: 900 ml). The evaporation process compacted maserate resulting from maceration, then analyzed the total chlorophyll content, total flavonoids, and total phenols. Amphora sp. extraction results showed good potential with 7.08 ppm chlorophyll content, total flavonoids 6,299 ppm, and total phenol 7,085 ppm, and IC50 DPPH values of 3332.5 ppm. The IC50 value of the extract of Amphora sp. still classified as very weak antioxidant activity, but in general the extract of Amphora sp. has other bioactive potentials such as chlorophyll, flavonoids, and total phenol which can be used as material for further studies for the development of natural medicinal ingredients from Amphora sp.Key words: antioxidant, diatome, DPPH, macaration, methanol.

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Cavalcante, KP, PI Tremarin und TAV Ludwig. „New records of amphoroid diatoms (Bacillariophyceae) from Cachoeira River, Northeast Brazil“. Brazilian Journal of Biology 74, Nr. 1 (Februar 2014): 257–63. http://dx.doi.org/10.1590/1519-6984.24512.

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Amphoroid taxa have been revised in recent decades. Many species formerly assigned to Amphora have been transferred to other recently proposed genera, as Seminavis (Naviculaceae) and Halamphora (Catenulaceae). In Brazil, there are few studies focused on amphoroid taxonomy. This study presents a taxonomic investigation of five uncommon amphoroid taxa from Brazilian diatom flora: Seminavis pusilla, S. strigosa, Amphora ectorii, Halamphora ghanensis and Halamphora sp. Seminavis strigosa is identical in valve morphology and morphometrical data to Amphora twenteana, and its synonymy is proposed. Seminavis pusilla, poorly found in Brazilian waters, has expanded its distribution. Halamphora ghanensis is a new record to American continent while Amphora ectorii are new to Brazilian aquatic systems. Halamphora sp. has distinct ultrastructural features in relation to similar species and is probably new for science.

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Boukhris, Saoussan, Khaled Athmouni, Ibtissem Hamza-Mnif, Rayda Siala-Elleuch, Habib Ayadi, Moncef Nasri und Alya Sellami-Kamoun. „The Potential of a Brown Microalga Cultivated in High Salt Medium for the Production of High-Value Compounds“. BioMed Research International 2017 (2017): 1–10. http://dx.doi.org/10.1155/2017/4018562.

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Amphora sp. was isolated from the Sfax Solar Saltern and cultivated under hypersaline conditions. It contains moderate rates of proteins, lipids, sugars, and minerals and a prominent content of bioactive compounds: polyphenols, chlorophyll a, carotenoids, and fatty acids. The analysis of fatty acids with GC/MS showed that the C16 series accounted for about 75% of Amphora sp. lipids. Saturated fatty acids whose palmitic acid was the most important (27.41%) represented 41.31%. Amphora sp. was found to be rich in monounsaturated fatty acids with dominance of palmitoleic acid. It also contains a significant percentage of polyunsaturated fatty acids with a high amount of eicosapentaenoic acid (2.36%). Among the various solvents used, ethanol at 80% extracted the highest amounts of phenols and flavonoids that were 38.27 mg gallic acid equivalent and 17.69 mg catechin equivalent g−1 of dried extract, respectively. Using various in vitro assays including DPPH and ABTS radicals methods, reducing power assay, and β-carotene bleaching assay, the 80% ethanolic extract showed high antioxidant activity. A strong antibacterial activity was checked against Gram-positive bacteria (Staphylococcus aureus and Micrococcus luteus) and Gram-negative bacteria (Klebsiella pneumoniae and Salmonella enterica). These results are in favor of Amphora sp. valorization in aquaculture and food and pharmaceutical industries.

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Khumaidi, A., A. Muqsith, A. Wafi, U. Mardiyah und L. Sandra. „Phytochemical screening and potential antioxidant of Amphora sp. in different extraction methods“. IOP Conference Series: Earth and Environmental Science 1221, Nr. 1 (01.08.2023): 012056. http://dx.doi.org/10.1088/1755-1315/1221/1/012056.

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Abstract Character of Amphora sp., has a golden brown color with bioactives such as photosynthetic pigments which have important biological functions for health. This study aims to determine the method of Amphora sp. extraction which is more effective and efficient in producing qualitative and quantitative bioactive, as well as the best antioxidant activity. Amphora sp., extracted with absolute ethanol solvent using different extraction methods, namely sonication (SON), maceration (MAS), and sonication-maceration (SON-MAS). The sonication method showed more effective and efficient results with yield value. The results showed that the SON-MAS method produced the highest yield of 9.8% compared to MAS 8.71% and SON 8.47%. The highest chlorophyll content was seen in the MAS method, total chlorophyll 2.36 ± 0.07 mg/l. Phytochemical content of the SON-MAS and SON methods contained flavonoids, alkaloids, and triterpenoids, while the MAS method showed two compounds, namely alkaloids and triterpenoids. Quantitatively, the phenol and flavonoid content showed that the SON method had a higher value, namely phenol and flavonoids. The best DPPH free radical scavenging antioxidant activity was seen in the SON method with an IC50 value of 745.2 ppm. The extraction method by sonication is considered to have effectiveness and efficiency in producing bioactive Amphora sp.

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Dias, Nicolina, David Mota, Ana Nicolau und Manuel Mota. „Monitoring Amphora sp. growth by flow cytometry“. Diatom Research 33, Nr. 3 (03.07.2018): 405–11. http://dx.doi.org/10.1080/0269249x.2018.1523231.

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Barokah, Giri Rohmad, Ajeng Kurniasari Putri und Gunawan Gunawan. „Kelimpahan Fitoplankton Penyebab HAB (Harmful Algal Bloom) di Perairan Teluk Lampung pada Musim Barat dan Timur“. Jurnal Pascapanen dan Bioteknologi Kelautan dan Perikanan 11, Nr. 2 (21.03.2017): 115. http://dx.doi.org/10.15578/jpbkp.v11i2.302.

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Telah dilakukan penelitian tentang analisis kelimpahan fitoplankton penyebab HAB (Harmful Algal Bloom) di Perairan Teluk Lampung pada musim barat dan musim timur. Penelitian ini bertujuan untuk mengidentifikasi alga yang berpotensi menyebabkan HAB yang berada di Teluk Lampung dan melihat pola hubungan kelimpahan fitoplankton yang bepotensi menyebabkan HAB dengan nutrien yang terkandung di perairan Teluk Lampung, Kab. Pesawaran, ProvinsiLampung. Pengambilan sampel dilakukan pada musim timur (April) dan musim barat (Oktober) pada tahun 2015. Dari penelitian ini ditemukan bahwa pada musim timur fitoplankton yang teridentifikasi dan berpotensi menyebabkan HAB adalah Amphora sp., Nitzchia sp., Ceratium sp., Dynophisis sp., Gymnodinium sp., dan Nocticulla scintillans. Pada musim barat fitoplankon yang teridentifikasi dan berpotensi menyebabkan HAB adalah Amphora sp., Nitzchia sp., Pseudonitzchia sp.,Alexadrium sp., Ceratium sp ., Cochlodium polykiroides, Dhynophisis sp ., Gambirdiscus toxicus, Gymnodinium sp., Nocticula scintillans, Procentrum sp., Pyrodinium bahamase dan Peridinium sp. Pada musim timur kelimpahan fitoplankton penyebab HAB yang terdapat di perairan Teluk Lampung didominasi oleh spesies Ceratium sp. dengan rata-rata 1,802 ind/L sedangkan pada musim barat kelimpahan fitoplankton di Teluk Lampung didominasi oleh Nitczchia sp ., dengan rata-rata kelimpahan 161,207ind/L.

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ZIDAROVA, RALITSA, MARGAUX POTTIEZ, PLAMEN IVANOV, MYRIAM DE HAAN und BART VAN DE VIJVER. „Amphora micrometra Giffen and Halamphora valdeminutissima sp. nov., two tiny benthic diatom species observed in the Black Sea“. Phytotaxa 626, Nr. 3 (23.11.2023): 199–207. http://dx.doi.org/10.11646/phytotaxa.626.3.6.

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During a survey of the diatom flora present on an artificial substratum (plexiglass) submerged off the southern Bulgarian Black Sea coast, a small-celled diatom taxon, reported previously from the Black Sea as Amphora (Halamphora) sp. S21, was observed. Detailed light and scanning electron microscope observations showed that the original taxon actually included two different taxa: an unknown Halamphora species described here as H. valdeminutissima sp. nov., and a second taxon, which, based on SEM observations, could be identified as Amphora micrometra Giffen. The morphology of both taxa is described in detail and a comparison with similar taxa is provided. Additionally, environmental data of the habitat is also provided.

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Kwon, Hyeong-Kyu, Han-Soeb Yang, Yeoung-Moon Yu und Seok-Jin Oh. „Effects of Substrate Size on the Growth of 4 Microphytobenthos Species (Achnanthes sp., Amphora sp., Navicula sp. and Nitzschia sp.)“. Journal of Environmental Science International 21, Nr. 1 (31.01.2012): 105–11. http://dx.doi.org/10.5322/jes.2012.21.1.105.

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Costa, Manoel Messias da Silva, Enide Eskinazi-Leça, Sonia Maria Barreto Pereira und Maria Elizabeth Bandeira-Pedrosa. „Diatomáceas epífitas em Galaxaura rugosa (J. Ellis & Solander) J.V. Lamouroux (Rhodophyta) no Arquipélago de Fernando de Noronha, PE, Nordeste do Brasil“. Acta Botanica Brasilica 23, Nr. 3 (September 2009): 713–19. http://dx.doi.org/10.1590/s0102-33062009000300010.

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Exemplares de Galaxaura rugosa (J. Ellis & Solander) J.V. Lamouroux foram coletados nos meses de junho/2006 e junho/2007, em três localidades do Arquipélago de Fernando de Noronha (Atalaia, Porto e Cagarras), com o objetivo de identificar a flora das diatomáceas epífitas que habita o talo da alga. Foram identificados 52 táxons distribuídos nas classes: Coscinodiscophyceae (19%), Fragilariophyceae (21%) e Bacillariophyceae (60%) denotando uma dominância de indivíduos com simetria bilateral, os quais corresponderam a 81% da flora identificada. As seguintes espécies caracterizaram a estrutura florística das diatomáceas, pois foram encontradas em mais de 70% das amostras analisadas: Amphora sp., Biddulphia biddulphiana (J.E. Smith) Boyer, Cocconeis scutellum Ehrenberg, Diploneis bombus Ehrenberg, Grammatophora marina (Lyngbye) Kützing, Mastogloia binotata (Grunow) Cleve, Navicula longa Grunow, Nitzschia sp., Psammodiscus nitidus (Gregory) Round in Mann, Rhabdonema adriaticum Kützing, Trachyneis aspera (Ehrenberg) Cleve e Tryblionella coarctata (Grunow) Mann. A diversidade específica variou entre média à alta, com os menores valores correspondendo aos florescimentos de Amphora sp. (49,3%), Mastogloia binotata (42,1%) e Nitzschia sp. (62,5%).

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MACHANA, Kwanchayanawish, Amonrat KANOKRUNG, Sirinart SRICHAN, Boonyadist VONGSAK, Maliwan KUTAKO und Ekarin SIAFHA. „Monitoring of Biochemical Compounds and Fatty Acid in Marine Microalgae from the East Coast of Thailand“. Walailak Journal of Science and Technology (WJST) 17, Nr. 4 (22.06.2018): 334–47. http://dx.doi.org/10.48048/wjst.2020.4645.

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Determinations of fatty acid profiles of five microalgae; Amphora sp., Chaetoceros sp., Melosira sp., Bellerochae sp., and Lithodesmium sp., from the east coast of Thailand were evaluated by conventional Gas Chromatography-Flame Ionization Detector (GC-FID). The results exhibited that the fatty acids suitable for biodiesel production were the most frequent entities encountered in all microalgae profiles. The GC chromatogram of fatty acid profiles in microalgae showed that both Amphora sp. and Chaetoceros sp. comprised essential omega-3 fatty acids, eicosapentaenoic acid (EPA), and docosahexaenoic acid (DHA). Additionally, this study assessed whether Fourier Transform infrared (FT-IR) microspectroscopy could be used to evaluate and monitor the biochemical compositions of microalgae, including lipid, carbohydrate, and protein profiles, by using colorimetric methods. Results showed that FT-IR spectra combined with biochemical values of lipid, carbohydrate, and protein contents were used as predictive models generated by partial least square (PLS) regression. Cross-validation of the lipid, protein, and carbohydrate models showed high degrees of statistical accuracy with RMSECV values of approximately 0.5 - 3.22 %, and a coefficient of regression between the actual and predicted values of lipids, carbohydrates, and proteins were 92.66, 95.73, and 96.43 %, respectively. The RPD values were all high (> 3), indicating good predictive accuracy. This study suggested that FT-IR could be a tool for the simultaneous measurement of microalgae composition of biochemical contents in microalgae cells.

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Lim, Yong-Kian, Fiona Seh-Lin Keng, Siew-Moi Phang, William T. Sturges, Gill Malin und Noorsaadah Abd Rahman. „Effect of irradiance on the emission of short-lived halocarbons from three common tropical marine microalgae“. PeerJ 7 (19.04.2019): e6758. http://dx.doi.org/10.7717/peerj.6758.

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Marine algae have been reported as important sources of biogenic volatile halocarbons that are emitted into the atmosphere. These compounds are linked to destruction of the ozone layer, thus contributing to climate change. There may be mutual interactions between the halocarbon emission and the environment. In this study, the effect of irradiance on the emission of halocarbons from selected microalgae was investigated. Using controlled laboratory experiments, three tropical marine microalgae cultures, Synechococcus sp. UMACC 371 (cyanophyte), Parachlorella sp. UMACC 245 (chlorophyte) and Amphora sp. UMACC 370 (diatom) were exposed to irradiance of 0, 40 and 120 µmol photons m−2s−1. Stress in the microalgal cultures was indicated by the photosynthetic performance (Fv/Fm, maximum quantum yield). An increase in halocarbon emissions was observed at 120 µmol photons m−2s−1, together with a decrease in Fv/Fm. This was most evident in the release of CH3I by Amphora sp. Synechococcus sp. was observed to be the most affected by irradiance as shown by the increase in emissions of most halocarbons except for CHBr3 and CHBr2Cl. High positive correlation between Fv/Fm and halocarbon emission rates was observed in Synechococcus sp. for CH2Br2. No clear trends in correlation could be observed for the other halocarbons in the other two microalgal species. This suggests that other mechanisms like mitochondria respiration may contribute to halocarbon production, in addition to photosynthetic performance.

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JOHANSON, KJELL ARNE, NATHALIE JEANNE MARY, TIN SJÖBERG und TOBIAS MALM. „Eighteen new species of Oecetis McLachlan 1877 (Trichoptera, Leptoceridae) from New Caledonia“. Zootaxa 4809, Nr. 2 (07.07.2020): 201–40. http://dx.doi.org/10.11646/zootaxa.4809.2.1.

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Eighteen new species of Oecetis are described, diagnosed, and illustrated from New Caledonia: Oecetis amphora sp. nov., Oecetis ovula sp. nov., Oecetis ramosa sp. nov., Oecetis loyolaensi sp. nov., Oecetis millei sp. nov., Oecetis christinae sp. nov., Oecetis rostrata sp. nov., Oecetis alicae sp. nov., Oecetis oxybelis sp. nov., Oecetis dorsospina sp. nov., Oecetis multidentata sp. nov., Oecetis gracilis sp. nov., Oecetis rostra sp. nov., Oecetis triramosa sp. nov., Oecetis flucta sp. nov., Oecetis nouvellecaledoniensis sp. nov., Oecetis variabilis sp. nov., and Oecetis ovata sp. nov. A diagnostic key is provided for males of Oecetis species of New Caledonia. The species display similarities in genitalic characteristics but also a high diversity of apomorphic features. The new species were collected from lotic habitats across most of Grande Terre.

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Cantonati, Marco, Nicola Angeli, Horst Lange-Bertalot und Zlatko Levkov. „New Amphora and Halamphora (Bacillariophyta) species from springs in the northern Apennines (Emilia-Romagna, Italy)“. Plant Ecology and Evolution 152, Nr. 2 (09.07.2019): 285–92. http://dx.doi.org/10.5091/plecevo.2019.1605.

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Background and aims – The detailed analysis of algae and cyanoprokaryotes in a heterogeneous group of spring habitats (including all the different typologies) of the northern Apennines (Emilia-Romagna Region, Italy) revealed a new Amphora species in a small mountain flowing spring with low conductivity, and a new Halamphora species in a large, inland-saline (Triassic gypsum), fast flowing spring (Poiano spring). The present study aims to describe in detail these two new species found in contrasting spring types. Methods – This study is based on light microscopy (both fresh –for plastids – and prepared materials) and scanning electron microscopy observations, as well as a thorough morphological, physical, chemical, and biological characterization of the habitats. Key results – Amphora eileencoxiae sp. nov. is most similar to A. vetula (and allied taxa), and is characterized by the outline with acutely rounded, moderately ventrally bent ends, by the dimensions, and by the well-defined, semi-elliptic dorsal area. Halamphora poianensis sp. nov. is most similar to H. gasseae but differs by the higher stria density, the clearly ventrally bent ends, and the strongly developed dorsal raphe ledge. Conclusions – This is a contribution to the knowledge of the genera Amphora and Halamphora in mountain springs in understudied geographic areas and inland-saline springs, the species communities of which are likely insufficiently explored.

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Jangiam, W., P. Tongtubtim und M. Penjun. „Biological Hydrogen Production from Amphora sp. Isolated from Eastern Coast of Thailand“. E3S Web of Conferences 93 (2019): 03004. http://dx.doi.org/10.1051/e3sconf/20199303004.

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The world is finding ways of producing fuel from many sources to replace the fossil fuels. Hydrogen is considered one of the most promising fuels for the future. One biological way of producing hydrogen from solar energy is using photosynthetic microorganisms.The objective of this study is to search for marine algae which produce hydrogen and study the appropriate conditions to produce hydrogen from marine algae. Firstly, the 5 strains of algae were studied the total gas production. Amphora sp. was selected and studied the appropriate conditions to produce hydrogen gas. The first condition, we studied the important factors for marine algae which were present and absent sulfur. The second condition was to find the suitable pH for producing hydrogen which were pH 7, pH 8 and pH 9. The last condition, we studied the optimal light intensity which were 481, 1075 and 2085 lux. The result showed that Amphora sp. can produce hydrogen gas in present sulfur media, pH 8 and light intensity 2085 lux in volume 495.3 ml per 1 L of algae or the average rate of produce hydrogen is 0.798 ml per g of algae per hour.

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Ojeda Rodríguez, Alicia, María Candelaria Gil Rodríguez und Alejandro Moreira Reyes. „Aportaciones al conocimiento de diatomeas bentónicas y ticoplanctónicas del puerto de Santa Cruz de Tenerife (islas Canarias)“. Vieraea Folia scientiarum biologicarum canariensium 33, Vieraea 33 (2005): 59–78. http://dx.doi.org/10.31939/vieraea.2005.33.07.

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Se han identificado 33 taxones pertenecientes a 20 géneros de diatomeas marinas bentónicas y ticoplanctónicas asociadas al briozoo Zoobothryon verticillatum (Delle Chiaje). Para cada especie además de los datos taxonómicos, se aportan reseñas ecológicas y corológicas, referencias bibliográficas y fotografías originales; asimismo se hacen comentarios en algunas especies. Del material estudiado se citan, por vez primera, doce taxones para el archipiélago Canario: Amphora borealis, Ardissonea cf. robusta, Cymbella sp, Gyrosigma cf. tenuissimum, Navicula sp.2, Nitzschia levidensis, Nitzschia cf. parvula, Pinn

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Galeano-Olaya, Pedro E., und Nelson A. Canal. „New species of Neosilba McAlpine (Diptera: Lonchaeidae) and new records from Colombia“. Papéis Avulsos de Zoologia 52, Nr. 31 (2012): 361–85. http://dx.doi.org/10.1590/s0031-10492012021100001.

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The Neotropical genus of lance flies Neosilba McAlpine could be found associated with fruits, flowers or buds of plants. There are few basic or applied studies of these insects, including data on taxonomy and/or economic importance. We described ten new species from Colombia: N. plana sp. nov., N. tolimensis sp. nov., N. amphora sp. nov., N. convexa sp. nov., N. concava sp. nov., N. orbata sp. nov., N. spiculata sp. nov., N. angusta sp. nov., N. distospinosa sp. nov. and N. piracea sp. nov. We presented a key for the all 40 valid species of the genus, included in five groups and two subgroups: major, parva, peltae, pendula and glaberrima groups. Glaberrima includes the two subgroups glaberrima and certa, and pendula includes the pendula and nigrocaerulea subgroups. Neosilba parva and N. bifida are reported for first time in Colombia.

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Zilli, Alberto. „Amphoraceras rothschildi and A. jordani sp. n.: two sibling species (Lepidoptera: Erebidae)“. Fragmenta Entomologica 50, Nr. 2 (21.12.2018): 77–82. http://dx.doi.org/10.4081/fe.2018.301.

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One new species of Amphoraceras which has so far remained unrecognised and intermingled within A. rothschildi is described as A. jordani sp. n. Both species are endemic to New Guinea, where they even happen to locally coexist and overlap phenologically. Main diagnostic features between the two taxa occur in the development of the unusual amphora-shaped structure present on male antenna, which is herewith detailed morphologically, aspects of the habitus and features of the genitalia.

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Chtourou, Haifa, Ines Dahmen, Fatma Karray, Sami Sayadi und Abdelhafidh Dhouib. „Biodiesel Production of Amphora sp. and Navicula sp. by Different Cell Disruption and Lipid Extraction Methods“. Journal of Biobased Materials and Bioenergy 9, Nr. 6 (01.12.2015): 588–95. http://dx.doi.org/10.1166/jbmb.2015.1563.

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Sudewa, Ketut M. Arya, Siyam Sujarwani, Ahmad Zailani und I. Gede Sridana Wisnawa. „PERTUMBUHAN DAN SINTASAN LARVA ABALON (Haliotis squamata) DENGAN PEMBERIAN KONSENTRAT Amphora sp.“ Buletin Teknik Litkayasa Akuakultur 14, Nr. 1 (14.11.2016): 21. http://dx.doi.org/10.15578/blta.14.1.2016.21-24.

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Abalon (Haliotis squamata) merupakan salah satu komoditas budidaya laut yang terus berkembang. Upaya untuk mendukung pengembangan budidaya abalon dilakukan di antaranya melalui penyediaan pakan alami dalam bentuk konsentrat. Kegiatan ini bertujuan untuk mengetahui pertumbuhan dan sintasan larva abalon dengan pemberian konsentrat Amphora sp. Perlakuan yang diberikan berupa pemberian konsentrat dengan umur yang berbeda. Perlakuan A pemberian konsentrat umur (lima hari), perlakuan B pemberian konsentrat umur (10 hari), dan C (15 hari). Setiap perlakuan diulang sebanyak tiga kali. Parameter yang diamati adalah pertumbuhan dan sintasan larva abalon. Hasil pengamatan menunjukkan bahwa pertumbuhan panjang dan lebar cangkang larva abalon pada perlakuan pemberian konsentrat umur lima hari lebih baik dibandingkan perlakuan lainnya. Sintasan larva abalon pada perlakuan pemberian konsentrat umur lima hari juga lebih tinggi dibandingkan perlakuan lainnya

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Romero-Romero, Celia Carolina, und M. del Pilar Sánchez-Saavedra. „Effect of light quality on the growth and proximal composition of Amphora sp.“ Journal of Applied Phycology 29, Nr. 3 (17.12.2016): 1203–11. http://dx.doi.org/10.1007/s10811-016-1029-7.

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Dalimunthe, Salmi Patima, Joko Samiaji und Sofyan Husein Siregar. „COMMUNITY STRUCTURE OF EPIZOIC DIATOM Pinna muricata AT SEAGRASS ECOSISTEM IN PANDARATAN BEACH TAPANULI TENGAH REGENCY NORTH SUMATRA PROVINCE“. Asian Journal of Aquatic Sciences 6, Nr. 2 (14.08.2023): 252–59. http://dx.doi.org/10.31258/ajoas.6.2.252-259.

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This research was carried out in March 2022; the location of this research is Pandaratan Beach, Tapanuli Tengah Regency, North Sumatra Province. The purpose of this study was to determine the abundance, relative abundance, diversity index, dominance index, and uniformity index of epizoic diatom species in Pinna muricata in the seagrass ecosystem of Pandaratan Beach. The method used is a survey method, using three sampling points to take p.muricata, the determination of 3 sampling points based on the density of the seagrass ecosystem. Sampling of diatoms was carried out by scraping the surface of the shells 5 cm wide, on the right and left backs of the shells. The diatom samples obtained were then analyzed in the laboratory. There were 12 types of epizoic diatoms found, consisting of Amphora sp, Bacillaria sp, Cyclotella sp, Cymbella sp, Isthmia sp, Melosira sp, Navicula sp, Nitzschia sp, Pinnularia sp, Skeletonema sp, Surirella sp, Synedra sp. the average value of epizoic diatom abundance on the shells of Pinna muricata ranged from 2.711,28–4.617,84 ind/cm2, the average value of the diversity index (H') of epizoic diatoms ranged from 1.43-2.50. The mean value of the dominance index (D) is in the range of 0.26 to 0.92. The average value of the uniformity index (E) ranges from 0.40-0.70.

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Anithavani, Murugan, Rayappan Anantha Rajan und Mariavincent Michael Babu. „Anticancer Activity of Lectin Extracted from the Saltpan Microalga, Navicula sp.“ UTTAR PRADESH JOURNAL OF ZOOLOGY 45, Nr. 1 (18.01.2024): 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 haemagglution assay. Among the strains, Navicula sp. showed potent haemagglutinin activity. Heamagglutinin from Navicula sp. was further partially characterized using chromatography methods. Navicula lectin agglutinated animal and human erythrocytes. It showed high specificity for human “O” erythrocytes with the titre value of 32 HA units. The HA activity was stable between pH 7and 8 and showed thermal stability between 30 ºC and 40 ºC (p<0.01). The isolated lectin was calcium dependent and HA activity was reduced when exposed to chelators such as EDTA (p<0.01). Hemagglutination inhibition assay exhibited the strongest binding specificity towards glucose, sucrose and galactose. The cross-adsorption assay revealed that the Navicula sp. Possesses single agglutinin. The purified lectin showed anticancer activity against cervical cancer cell lines.

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El-Garhy, Hoda. „Molecular and Microscopic Identification of amphora sp. Isolated from an aquatic source in Egypt“. Annals of Agricultural Science, Moshtohor 58, Nr. 1 (01.03.2020): 53–60. http://dx.doi.org/10.21608/assjm.2020.108481.

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Khumaidi, Ach, Abdul Wafi und Abdul Muqsith. „Prediksi Aktivitas Biologis Metabolite Sekunder Amphora Sp. Secara insilico: Untuk Pengembangan Bahan Obat Alami“. Journal of Aquaculture Science 6, Nr. 1IS (31.07.2021): 110. http://dx.doi.org/10.31093/joas.v6i1is.163.

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Lee, Seung-Hong, Rohan Karawita, Abu Affan, Joon-Baek Lee, Ki-Wan Lee, Bae-Jin Lee, Dong-Woo Kim und You-Jin Jeon. „Potential of Benthic Diatoms Achnanthes longipes, Amphora coffeaeformisand Navicula sp. (Bacillariophyceae) as Antioxidant Sources“. ALGAE 24, Nr. 1 (01.03.2009): 47–55. http://dx.doi.org/10.4490/algae.2009.24.1.047.

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Benni, Sofyan Husein Siregar und Irvina Nurachmi. „EFFECT OF PARTICLE SIZES AND CONTENT OF ORGANIC MATTER SEDIMENT ON EPIPELIC DIATOM ABUNDANCE IN BAYUR BAY WATERS OF WEST SUMATERA“. Asian Journal of Aquatic Sciences 3, Nr. 1 (09.04.2020): 49–59. http://dx.doi.org/10.31258/ajoas.3.1.49-59.

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The aim of this study is to determine the water quality, the particle size (mm) and the organic matter content sediment, the type and abundance of epipelic diatoms, and the effect of particle size and organic matter content of the sediment on the abundance of epipelic diatoms at Bayur Bay Waters. This study was conducted in June - July 2019. The survey method was applied in this study and sampling location determine by purposive sampling. The resullt of measurement of water quality parameter ranged salinity 29 ‰ - 34 ‰, pH 7-8, current speed of 0,10 m/s – 0,53 m/s, temperature 30,330C - 31,670C. The sediment types are grouped into four types, namely gravel, sandy gravel, gravelly sand, and sand. The average of particle size (Mz) ranged -1,37 Ø - 0,80 Ø. The organic matter on sediment ranged 2,46% -6,36%. Eleven species of epipelic diatoms was recorded namely Amphora sp, Cocconeis sp, Diploineis sp, Halamphora sp, Melosira sp, Navicula sp, Nitzschia sp, Pinnularia sp, Stephanodiscus sp, Isthmia sp and Synedra sp. The average value of abundance range 2.836 – 10.812 ind/cm2. Epipelik diatom abundance was not significantly different between the stations. The effect of sediment particle size on the abundance of epipelic diatoms by 34,37%. The effect of content of organic matter sediment on abundance of epipelic diatoms in Bayur Bay Waters by 51,78%.

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Di Camillo, C., S. Puce, T. Romagnoli, S. Tazioli, C. Totti und G. Bavestrello. „Relationships between benthic diatoms and hydrozoans (Cnidaria)“. Journal of the Marine Biological Association of the United Kingdom 85, Nr. 6 (09.11.2005): 1373–80. http://dx.doi.org/10.1017/s0025315405012555.

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Some examples of relationships between hydroids and epibionthic diatoms from the Mediterranean Sea are described, verifying the kind of interaction existing between the two partners. The athecate Eudendrium racemosum hosts an extremely rich diatom assemblage, mainly comprising Licmophora spp., Amphora spp. and Cocconeis spp. On the contrary, only adnate growth forms (Cocconeis pseudonotata, C. dirupta) were observed in diatom communities growing on the external side of thecate species Campanularia hincksii, Clytia linearis and Synthecium evansi. Some diatom species (Cocconeis notata, Cylindrotheca sp. and Navicula sp.) are able to survive in the intrathecal microenvironment. They live in the narrow space between hydrotheca and polyp, receiving protection and probably using the nutrients produced by hydroid metabolism. Sunlight can penetrate through transparent thecae and reach the diatom layer, making photosynthesis possible.

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Jena, Jayashree, Nilotpala Pradhan, Bishnu Prasad Dash, Prasanna Kumar Panda und Barada Kanta Mishra. „Pigment mediated biogenic synthesis of silver nanoparticles using diatom Amphora sp. and its antimicrobial activity“. Journal of Saudi Chemical Society 19, Nr. 6 (November 2015): 661–66. http://dx.doi.org/10.1016/j.jscs.2014.06.005.

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Sassi, Patrícia Giulianna Petraglia, Clediana Dantas Calixto, Viviane Pereira Tibúrcio, Nyelson da Silva Nonato, Raphael Abrahão, Hélène Hégaret, Cristiane Francisca da Costa Sassi und Roberto Sassi. „Effectiveness of nutrient remotion and cell physiology of Amphora sp. cultured in shrimp farm effluents“. Environmental Science and Pollution Research 25, Nr. 18 (21.04.2018): 17920–26. http://dx.doi.org/10.1007/s11356-018-2011-5.

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Dahmen-Ben Moussa, Ines, Khaled Athmouni, Haifa Chtourou, Habib Ayadi, Sami Sayadi und Abdelhafidh Dhouib. „Phycoremediation potential, physiological, and biochemical response of Amphora subtropica and Dunaliella sp. to nickel pollution“. Journal of Applied Phycology 30, Nr. 2 (24.10.2017): 931–41. http://dx.doi.org/10.1007/s10811-017-1315-z.

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Indrayani, Indrayani, Navid R. Moheimani und Michael A. Borowitzka. „Long-term reliable culture of a halophilic diatom, Amphora sp. MUR258, in outdoor raceway ponds“. Journal of Applied Phycology 31, Nr. 5 (11.04.2019): 2771–78. http://dx.doi.org/10.1007/s10811-019-01803-y.

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Chtourou, Haifa, Ines Dahmen, Ahlem Jebali, Fatma Karray, Ilem Hassairi, Slim Abdelkafi, Habib Ayadi, Sami Sayadi und Abdelhafidh Dhouib. „Characterization of Amphora sp., a newly isolated diatom wild strain, potentially usable for biodiesel production“. Bioprocess and Biosystems Engineering 38, Nr. 7 (26.02.2015): 1381–92. http://dx.doi.org/10.1007/s00449-015-1379-6.

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Jiang, Hai-ying, Chao-qun Hu, Hai-peng Yang, Lv-ping Zhang, Peng-fei Peng, Peng Luo, Zhe Zhao und Jian-jun Xia. „Morphology and phylogeny of Halamphora yongxingensis sp. nov. (Bacillariophyta), a new marine benthic diatom isolated from Yongxing Island, South China Sea“. Phytotaxa 195, Nr. 1 (22.01.2015): 53. http://dx.doi.org/10.11646/phytotaxa.195.1.3.

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Halamphora yongxingensis sp. nov., a marine benthic diatom isolated from an intertidal reef around the Yongxing Island, South China Sea (16° 58’ 43.3” N, 112° 14’ 41.7” E), is described in this study on the basis of light and electron microscopy. This diatom is also compared with related taxa such as Halamphora subturgida (Hustedt) Levkov and Amphora subtropica Wachnicka & Gaiser. In addition, phylogenetic analyses based on 18S rDNA and rbcL gene were also conducted. The results revealed that H. yongxingensis was clustered into the Halamphora clade, closely related to Halamphora montana (Krasske) Levkov. We discuss morphological differences between H. yongxingensis and H. montana.

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Kapustin, Dmitry A., Anton M. Glushchenko, John P. Kociolek und Maxim S. Kulikovskiy. „Encyonopsis indonesica sp. nov. (Bacillariophyceae, Cymbellales), a new diatom from the ancient lake Matano (Sulawesi, Indonesia)“. PhytoKeys 175 (17.03.2021): 1–11. http://dx.doi.org/10.3897/phytokeys.175.61044.

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A new species, Encyonopsis indonesica, is described from the ancient lake Matano, Sulawesi island, Indonesia. The morphology of this species was studied by means of light and scanning electron microscopy. E. indonesica has a remarkable valve ultrastructure. The valve surface is ornamented with numerous longitudinal siliceous ribs and siliceous verrucae. Valve face delineated from the mantle by a thickened marginal ridge. Raised sterna border the raphe branches. Raphe is distinctly undulate with distal ends hooked strongly to the ventral side. The only similar species to E. indonesica is Amphora dissimilis described from New Caledonia. Comparison of both taxa is given and A. dissimilis is transferred to Encyonopsis. The taxonomic placement of both taxa is evaluated, and the phenomenon of external siliceous ornamentation is discussed.

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Zhou, Xiaojian, Jie Meng, Zhaowei Yu, Li Miao und Cuili Jin. „The Alterations of Biofilm Formation and EPS Characteristics of a Diatom by a Sponge-Associated Bacterium Psychrobacter sp.“ Scientifica 2018 (24.06.2018): 1–10. http://dx.doi.org/10.1155/2018/1892520.

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A sponge-associated bacterium, which was identified as Psychrobacter sp. in this study, was found with high activity against biofilm formation of benthic diatoms, including Amphora sp., Nitzschia closterium, Nitzschia frustulum, and Stauroneis sp. The activity against diatom biofilm formation by the tested strain was confirmed mostly in the culture supernatant and could be extracted using organic solvents. Treatment with its supernatant crude extract significantly reduced the cells of Stauroneis sp. forming biofilm and slightly increased the cells floating in the culture medium, which results in the ratio of biofilm cell/floating cell altering from 0.736 in control to 0.414 in treatment. Use of the supernatant crude extract led to increased production of extracellular polymeric substances (EPSs) by diatom Stauroneis sp. from 16.66 to 41.59 (g/g cell dry weight). The increase in EPS production was mainly contributed by soluble EPS (SL-EPS) and followed by the EPS that was tightly bound to biofilm cells (BF-TB-EPS). In addition, the supernatant crude extract caused significant changes in the monosaccharides composition of the EPS of Stauroneis sp. Specifically, glucuronic acid (Glc-A) and N-acetyl-D-glucosamine (Glc-NAc) in BF-TB-EPS were 55% fold decreased and 1219% fold increased, respectively. Based on our findings, we proposed that these changes in monosaccharides composition might lead to a decreased biofilm formation efficiency of diatom.

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STERRENBURG, FRITHJOF A. S., MARY ANN TIFFANY, FRIEDEL HINZ, WULF E. HERWIG und PAUL E. HARGRAVES. „Seven new species expand the morphological spectrum of Haslea. A comparison with Gyrosigma and Pleurosigma (Bacillariophyta)“. Phytotaxa 207, Nr. 2 (08.05.2015): 143. http://dx.doi.org/10.11646/phytotaxa.207.2.1.

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Seven new Haslea species demonstrate that the genus has evolved a richer morphological repertoire than so far reported. H. feriarum sp. nov. has a valve contour suggesting an Amphora; H. staurosigmoidea sp. nov. has a sigmoid valve with a pseudostauros; H. tsukamotoi sp. nov. and the closely similar H. meteorou sp. nov. possess uniquely shaped external central raphe endings and a fully sideways-tilted internal raphe system; H. clevei sp. nov. and H. avium sp. nov. also have central raphe ending shapes not yet described in the genus; H. amicorum shows interrupted longitudinal fissures besides the continuous fissures characteristic of Haslea. A survey of the Haslea species described, for differentiation of our taxa, led to two conclusions: 1) the data in the protologue of H. indica Desikachary & Prema are spurious and 2) “Navicula” duerrenbergiana Hustedt is here transferred to the genus Haslea. The basic Haslea morphology is a sandwich-type valve, with a grate-like inner layer (here called basal layer) and an outer layer (here called tegumental layer) perforated by continuous longitudinal fissures. These two layers are shored by upright longitudinal “bulkheads”, here called saepes, seen to be perforated in the valves that permitted their observation. This morphology is closely similar to that of Gyrosigma (and Pleurosigma). The great variety of central external raphe ending patterns in Haslea, Gyrosigma and Pleurosigma is shown and discussed.

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CAPUT MIHALIĆ, KATARINA, MARIJA GLIGORA UDOVIČ, INES GALOVIĆ, IGOR STANKOVIĆ, MIRELA ŠUŠNJARA, PETAR ŽUTINIĆ, ANTONIJA KULAŠ, IGOR ŠPOLJARIĆ und ZLATKO LEVKOV. „Tetramphora croatica sp. nov.—A new brackish-water species from Lake Vransko, Croatia“. Phytotaxa 401, Nr. 4 (17.04.2019): 276. http://dx.doi.org/10.11646/phytotaxa.401.4.5.

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The genus Amphora sensu lato was considered highly heterogeneous for a long time. Modern microscopy and molecular analyses revealed significant differences in cell morphology and structure, thus suggesting polyphyly of the genus. New findings resulted in separation and description of several amphoroid genera. Recently, the genus Tetramphora Mereschkowsky was re-established based on ultrastructural and molecular analyses. The genus is widely spread in marine and brackish habitats. Recent observations of contemporary flora and cores from Lake Vransko (Croatia) revealed a new species of Tetramphora. The new species is characterized by having large semi-elliptical valves with arched dorsal margin and biarcuate ventral margin, length of 49.0–78.0 µm and width between 7.5–12.0 µm. The raphe is discontinuous, with proximal raphe ends externally covered with large siliceous flap. Striae are uniseriate, composed of small round to elongated areolae. Based on this unique combination of characters visible on light and scanning electron microscope, a new species Tetramphora croatica sp. nov. is described.

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Soltanpour-Gargari, Ali, Martin Lodenius und Friedel Hinz. „Epilithic diatoms (Bacillariophycae) from streams in Ramsar, Iran“. Acta Botanica Croatica 70, Nr. 2 (01.01.2011): 167–90. http://dx.doi.org/10.2478/v10184-010-0006-5.

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Epilithic diatoms (Bacillariophycae) from streams in Ramsar, Iran Epilithic diatoms were identified from five small streams and one canal in Ramsar, northwest Iran. Atotal of 155 diatom taxa belonging to 37 genera were found and only two species remained unidentified (Fragilaria sp. and Nitzschia sp.). Achnanthes, Nitzschia, Navicula, Cocconeis, Melosira, Amphora, Craticula, Diatoma, Surirella, Cymbella, Diploneis and Entomoneis were among the most abundant genera. Eighty seven taxa were recorded for the first time in Iran. Thirty two of the genera belong to the Pennales and 5 to the Centrales. Species richness was rather high ranging from 66 to 95 taxa at the six sites studied. The epilithic diatom species found in Ramsar were dominated by cosmopolitan taxa found in meso- to fairly eutrophicwaters with high conductivity and high nutrient concentrations. The abundances found at all six sites were compiled in order to estimate the overall abundance of each taxon in Ramsar. This study includes EM pictures of diatoms observed in Ramsar, Iran.

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Harini, Anandapadmanaban Baala, Naduvil Veettil Sarangi, Natarajan Nisha und Renganathan Rajkumar. „Cultivation of marine diatom, Amphora sp. in municipal wastewater for enhancing lipids toward sustainable biofuel production“. South African Journal of Botany 155 (April 2023): 288–97. http://dx.doi.org/10.1016/j.sajb.2023.02.007.

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Bubak, Iwona, Sylwia Śliwińska-Wilczewska, Paulina Głowacka, Agnieszka Szczerba und Katarzyna Możdżeń. „The Importance of Allelopathic Picocyanobacterium Synechococcus sp. on the Abundance, Biomass Formation, and Structure of Phytoplankton Assemblages in Three Freshwater Lakes“. Toxins 12, Nr. 4 (16.04.2020): 259. http://dx.doi.org/10.3390/toxins12040259.

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The contribution of picocyanobacteria to summer phytoplankton blooms, accompanied by an ecological crisis, is a new phenomenon in Europe. This issue requires careful investigation. We studied allelopathic activity of freshwater picocyanobacterium Synechococcus sp. on phytoplankton assemblages from three freshwater lakes. In this study, the allelopathic activity of the Synechococcus sp. on the total abundance, biomass, as well as structure of the phytoplankton assemblages were investigated. Our results indicated that addition of exudates obtained from Synechococcus sp. affected the number of cells and biomass of the phytoplankton communities; the degree of inhibition or stimulation was different for each species, causing a change in the phytoplankton abundance and dominance during the experiment. We observed that some group of organisms (especially cyanobacteria from the genus Aphanothece, Limnothrix, Microcystis, and Synechococcus) showed tolerance for allelopathic compounds produced and released by Synechococcus sp. It is also worth noting that in some samples, Bacillariophyceae (e.g., Amphora pediculus, Navicula pygmaea, and Nitzschia paleacea) were completely eliminated in the experimental treatments, while present in the controls. This work demonstrated that the allelopathic activity exhibited by the Synechococcus sp. is probably one of the major competitive strategies affecting some of the coexisting phytoplankton species in freshwater ecosystems. To our best knowledge this is the first report of the allelopathic activity of Synechococcus sp. in the freshwater reservoirs, and one of the few published works showing allelopathic properties of freshwater picocyanobacteria on coexisting phytoplankton species.

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WU, WEIWEI, HUINA LIN, VISHAL PATIL, JOHN PATRICK KOCIOLEK, LIN SUN, XUESONG LI, JUNRONG LIANG, CHANGPING CHEN und YAHUI GAO. „A new marine epiphytic diatom species, Halamphora yundangensis sp. nov. (Bacillariophyceae), from Yundang Lake, Southeast coast of China“. Phytotaxa 450, Nr. 2 (25.06.2020): 209–18. http://dx.doi.org/10.11646/phytotaxa.450.2.6.

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Halamphora yundangensis sp. nov. is described as a new species epiphytic on the green seaweed Ulva lactuca, from Yundang Lake, Fujian Province, China. Morphological details of the new species with respect to shape, size and valve ultrastructure are presented, with observations based on light microscopy (LM) and scanning electron microscopy (SEM). The main features of Halamphora yundangensis are dorsiventral, semi-lanceolate valves with convex dorsal margin and straight ventral margin, as well as valve ends distinctly protracted and capitate. Externally, a prominent marginal ridge forming the image of a broad hyaline area is present. Internally, dorsal striae are regularly biseriate, and a row of areolae lies along raphe. The new species is compared with similar species in both Amphora and Halamphora.

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Journal, Baghdad Science. „The Consumed Natural Diet of Chondrostoma regium (Heckel, 1843) from Tigris River, Salah Al-Deen Province“. Baghdad Science Journal 8, Nr. 1 (13.03.2011): 348–56. http://dx.doi.org/10.21123/bsj.8.1.348-356.

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The foreguts of a total of 515 fish of Chondrostoma regium (Heckel, 1843) (locally: Bala’aot Malloky) were studied. These fish were collected from Tigris River at Salah Al-Deen Province (between Al-Hagag & Yathrib) for 20 months between March and October of the next year. Detritus, plant in origin materials (19.6%, 23.0% & 24.9%); green and blue green algae, mostly Cladophora, Cosmarium and Merismpedia sp. (17.1%, 12.9% & 12.2%) and diatoms, mostly Diatoma, Chanathes, Amphora and Cyulbella sp. (16.9%, 8.8% & 8.2%) were the main food categories taken by these fishes according to occurrence (O%), volumetric methods (V%) and ranking index (R%). Debris (not part of the diet) took 45.3% of the studied fish foreguts by volume. Detritus was also the most important food category (25.9%, 18.2%, 22.9% & 19.8%, by ranking index) at all sampling stations respectively, and taken by different fish size groups (168-200, 201-300 & 301-350mm).The diet overlaps between these fish size groups and that between different sampling stations were ranged between 0.86-1.0, i.e. fish were mainly feeding on the same food organisms.

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Al-Shamma’a, Amer A., Zamzam M. Jasim und Muhanned R. Nashaat. „The Consumed Natural Diet of Chondrostoma regium (Heckel, 1843) from Tigris River, Salah Al-Deen Province“. Baghdad Science Journal 8, Nr. 1 (13.03.2011): 348–56. http://dx.doi.org/10.21123/bsj.2011.8.1.348-356.

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The foreguts of a total of 515 fish of Chondrostoma regium (Heckel, 1843) (locally: Bala’aot Malloky) were studied. These fish were collected from Tigris River at Salah Al-Deen Province (between Al-Hagag & Yathrib) for 20 months between March and October of the next year. Detritus, plant in origin materials (19.6%, 23.0% & 24.9%); green and blue green algae, mostly Cladophora, Cosmarium and Merismpedia sp. (17.1%, 12.9% & 12.2%) and diatoms, mostly Diatoma, Chanathes, Amphora and Cyulbella sp. (16.9%, 8.8% & 8.2%) were the main food categories taken by these fishes according to occurrence (O%), volumetric methods (V%) and ranking index (R%). Debris (not part of the diet) took 45.3% of the studied fish foreguts by volume. Detritus was also the most important food category (25.9%, 18.2%, 22.9% & 19.8%, by ranking index) at all sampling stations respectively, and taken by different fish size groups (168-200, 201-300 & 301-350mm).The diet overlaps between these fish size groups and that between different sampling stations were ranged between 0.86-1.0, i.e. fish were mainly feeding on the same food organisms.

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Lee, Seung-Hong, Rohan Karawita, Abu Affan, Joon-Baek Lee, Bae-Jin Lee und You-Jin Jeon. „Potential Antioxidant Activites of Enzymatic Digests from Benthic Diatoms Achnanthes longipes, Amphora coffeaeformis, and Navicula sp. (Bacillariophyceae)“. Preventive Nutrition and Food Science 13, Nr. 3 (30.09.2008): 166–75. http://dx.doi.org/10.3746/jfn.2008.13.3.166.

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El-Bahr, Sabry, Saad Shousha, Ahmed Shehab, Wassem Khattab, Omar Ahmed-Farid, Islam Sabike, Osama El-Garhy, Ibrahim Albokhadaim und Khaled Albosadah. „Effect of Dietary Microalgae on Growth Performance, Profiles of Amino and Fatty Acids, Antioxidant Status, and Meat Quality of Broiler Chickens“. Animals 10, Nr. 5 (27.04.2020): 761. http://dx.doi.org/10.3390/ani10050761.

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The study used 96 broiler chickens to evaluate the impact of three species of microalgae on performance, profiles of fatty and amino acids, antioxidants, and meat quality of breast muscles. Birds were divided into four groups (24 birds/each) with 4 replicates (6 birds each). Birds in the first group were fed basal diet and served as a control (C). Birds of 2–4 groups were fed basal diet mixed with same dose (1 g/kg diet) of Chlorella vulgaris (CV), Spirulina platensis (SP), and Amphora coffeaformis (AC). At the age of 36 days, performance parameters were reported, and breast muscle samples were collected and stored frozen at −80 °C. AC shared CV in the superiority of increasing final body weight and body weight gain compared to SP and control. AC shared SP in the superiority of increasing the level of essential fatty and amino acids and decreasing the microbial growth in breast muscle compared to CV and control. All studied microalgae reduced malondialdehyde (MDA) and protein carbonyl (PC) levels, cooking loss, and aerobic plate count (APC) and increased the superoxide dismutase (SOD) activities in breast muscle compared to control. The current study indicated that studied microalgae, notably AC, can be used to enhance performance and meat quality in broilers chickens.

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Kovaleva, G. V., A. V. Nazarenko und K. V. Dyuzhova. „BIOGENIC AND ABIOGENIC COMPONENTS OF DUST STORMS“. Ecology. Economy. Informatics.System analysis and mathematical modeling of ecological and economic systems 1, Nr. 6 (2021): 104–11. http://dx.doi.org/10.23885/2500-395x-2021-1-6-104-111.

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The article is devoted to the study of biogenic (pollen and diatoms) and abiogenic components in the composition of aeolian particles carried by dust storms. Studies of atmospheric dust were performed using a Carl Zeiss EVO 40 XVP scanning electron microscope equipped with an EDS (Energy-dispersive spectroscopy) “Inca Energy” microanalysis system. The studied samples were collected in the cities of Rostov-on-Don and Taganrog, as well as on the northern coast of the Taganrog Bay of the Sea of Azov (village Varenovka, Neklinovsky district) during a large-scale dust storm in September 2020, and a local storm in October 2019. Viewing of dust samples using a scanning electron microscope showed the predominance of mineral particles of pelitic and fine aleurite fractions in all samples. In the samples of Aeolian materials, it was possible to identify diatoms (Amphora ovalis, Staurosirella martyi, Hantzschia cf. amphioxys, Cocconeis pediculus, Actinocyclus octonarius var. tenellus, Navicula sp., Nitzschia sp., Anomoeoneis sp., Epithemia sp., Tryblionella sp., Pinnularia sp.), as well as pollen of ragweed, wormwood, cornflower, cereals and other representatives of the inter-seasonal grass of the steppe zone. To study the abiogenic component of the Aeolian material, the method of mapping elements was used. The microanalysis was carried out at a qualitative level, for clarity and information when constructing maps, the elements with the highest concentration (Si, Ca, Al) were selected. Oxygen distribution maps were analyzed separately. This method can be useful in cases where the samples contain fragmented valves of diatoms, whose identification by morphological features is very difficult. This method can be no less useful when identifying microplastic in soil, water, and Aeolian sediments.

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LÓPEZ-FUERTE, FRANCISCO OMAR, und DAVID A. SIQUEIROS-BELTRONES. „Halamphora primus (Bacillariophyta): a new diatom species from the Gulf of California, Mexico“. Phytotaxa 369, Nr. 4 (21.09.2018): 287. http://dx.doi.org/10.11646/phytotaxa.369.4.6.

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A new diatom species, Halamphora primus sp. nov. is here proposed, and described based on comparison of morphological traits. This new taxon has semi-lanceolate valves, strongly dorsiventral. Its ventral margin goes from slightly concave in the mid part to lightly convex toward the eccentric parts. Unlike most species of Amphora sensu lato that have the raphe distal ends curved dorsally, in H. primus these are curved ventrally. A ledge is present on the dorsal side of raphe, and a short conopeum extends along the raphe sternum fading before reaching the apices. A dorsal fascia is absent. Specimens were collected along with a highly diverse taxocoenosis (S=281) from the skin of stonefish in the Gulf of California, Mexico. However, the scarceness of H. primus frustules in the sampled taxocoenosis strongly suggests that it is not an epizoic form of the stonefish.

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Zhang, Saijin, Chen Xu und Peter H. Santschi. „Chemical composition and 234Th (IV) binding of extracellular polymeric substances (EPS) produced by the marine diatom Amphora sp.“ Marine Chemistry 112, Nr. 1-2 (November 2008): 81–92. http://dx.doi.org/10.1016/j.marchem.2008.05.009.

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