188,287 research outputs found
Dąbek, P., Sabbe, K., Witkowski, A., Archibald, C., Kurzydłowski, K. & Zgłobicka, I. (2013) Cymatosirella Dąbek, Witkowski & Sabbe gen. nov., a new marine benthic diatom genus (Bacillariophyta) belonging to the family Cymatosiraceae. Phytotaxa 121 (1): 42-56.
No full textDąbek, P., Sabbe, K., Witkowski, A., Archibald, C., Kurzydłowski, K., Zgłobicka, I. (2014): Dąbek, P., Sabbe, K., Witkowski, A., Archibald, C., Kurzydłowski, K. & Zgłobicka, I. (2013) Cymatosirella Dąbek, Witkowski & Sabbe gen. nov., a new marine benthic diatom genus (Bacillariophyta) belonging to the family Cymatosiraceae. Phytotaxa 121 (1): 42-56. Phytotaxa 183 (2): 120-120, DOI: 10.11646/phytotaxa.183.2.6, URL: http://dx.doi.org/10.11646/phytotaxa.183.2.
Kinetic dataset - aqueous oxidation of aliphatic acids by hydroxyl radical
No full textIn the five spreadsheets included in this dataset, the values of the bimolecular reaction rate coefficients for the aqueous oxidation of aliphatic carboxylic acids (protonated forms), carboxylate anions (deprotonated forms) by hydroxyl radical (OH), and their activation parameters are compiled. These data include the literature data (cited within the readme.txt file) and the values of bimolecular reaction rate coefficients. The first spreadsheet (298K_literature_refs) contains raw literature data, compiled bimolecular reaction rate coefficients at 298K with literature references. The second spreadsheet (298K_SAR) contains the reviewed data, used for developing and optimizing a kinetic structure-activity relationship model. The third spreadsheet (T_dept_literature_refs) contains raw literature data, compiled bimolecular reaction rate coefficients, measured between 278 and 328 K. The fourth spreadsheet contains the reviewed data, bimolecular reaction rate coefficients, measured between 278 and 328 K, with outliers removed and missing values (when different temperatures were used between studies) filled out with values calculated using the Arrhenius expression – these data were used for developing and optimizing a kinetic structure-activity relationship model. The fifth spreadsheet (T_dept_activaton_only) lists the values of activation parameters derived via the Arrhenius expression for the carboxylic acids under investigation. </p
Таможенная логистика – генезис, разделение понятий
No full textWitkowski P. Customs Logistics – Genesis, Separation of Concept
Cymatoneis margarita Witkowski
No full text<p> <b> 46. <i>Cymatoneis margarita</i> Witkowski (Fig. 105)</b> </p> <p> <b>Type locality:</b> Orum Beach, Oman.</p> <p> <b>References:</b> Witkowski <i>et al.</i> 2000. p. 179, pl. 109, figs 9–17.</p> <p> <b>Morphometrics:</b> Valves 16–17 (13.5–18) μm long, 6–6.3 (5–6) μm wide, and transapical striae 18–19 (18–20) in 10 μm.</p> <p> <b>Remarks:</b> This species differs from other <i>Cymatoneis</i> in smaller size and lanceolate to elliptic-lanceolate valve outline (Witkowski <i>et al.</i> 2000). <i>Cymatoneis margarita</i> is distributed in Oman as type locality, the Mississippi Delta and Borneo (Witkowski <i>et al.</i> 2000). Since then, it has been reported off the coasts of Guinea, West Africa (Compère and Riaux-Gobin 2009). Although the species have been reported in a few areas, it seems to be pantropical taxon in warmer ocean.</p> <p>This taxon has been found a few times in sand beaches of the Seogwipo coast, representing a new report to South Korea.</p>Published as part of <i>Joh, Gyeongje, 2021, Distribution and frequent occurrence of diatom taxa (Bacillariophyta) inhabiting warmer oceans in Seogwipo coast of Jeju Island, southernmost Korea, pp. 1-67 in Phytotaxa 517 (1)</i> on page 33, DOI: 10.11646/phytotaxa.517.1.1, <a href="http://zenodo.org/record/8061058">http://zenodo.org/record/8061058</a>
Gliwiczia skvortzowii Kulikovskiy, Lange-Bertalot & Witkowski 2013, sp. nov.
No full text<i>Gliwiczia skvortzowii</i> Kulikovskiy, Lange-Bertalot & Witkowski <i>sp. nov.</i> Figs. 1–42 <p>Frustules with a horse shoe-like internal cavum at both raphe and rapheless valve as characteristic of the genus. Valves broadly elliptical with broadly to weakly cuneately rounded ends. Length 12–24 µm, breadth 8–13 µm.</p> <p>LM, raphe valve (Figs 20–32): Raphe filiform, straight, external central ends slightly expanded, distal ends shortly indistinctly deflected. Axial area narrow, linear, proximally broadening into a deltoid shape. Central area rhombi at the central nodule forming ca. 1.5 µm broad stauros to the valve margin unilaterally; on the opposite side the stauros appears interrupted by the elliptical cavum, at the margin (but see SEM, external view Figs 33, 34). Striae 24–25 in 10 µm, radiate throughout with several intercalated short ones at the margins proximally. Areolae punctate, ca. 30 in 10 µm.</p> <p>LM, rapheless valve (Figs 1–19): Axial and proximal central area rhombic-lanceolate; central area forming a stauros unilaterally which appears obscured on the opposite side by an elliptical cavum. Striae ca. 24 in 10 µm, becoming progressively radiate from proximal towards distal part of the valve; no shorter striae intercalated at margins. Areolae irregularly spaced, considerably coarser than in raphe valves, 15–18 in 10 µm. SEM, raphe valve, external view (Figs 33–36): Raphe with small external central pores and distal ends more or less distinctly to opposite sides deflected. Distal ends may be pore-like expanded at a junction between the valve face and the mantle. The stauroid central area appears clearly asymmetrical becoming expanded towards the margin at that side where the cavum lies internally. Areola foramina are circular and open.</p> <p>SEM, raphe valve, internal view (Figs 37–40): Central raphe ends deflected clearly to opposite sides as generally characteristic for achnanthoid and cocconeoid monoraphid genera. The stauros together with the raphe sternum is strongly elevated above the internal valve surface. The conspicuous cavity is opened by a relatively small aperture. Areolae uniseriate, small, approximately circular. Occlusion membranes visible or destroyed.</p> <p>SEM, rapheless valve, internal view (Figs 41–42): The relief-like appearance of the rhombical sternum, stauros and cavum generally as in the raphe valve. Areola pattern differs from raphe valves by larger apertures lying in crater-like depressions, becoming smaller and transapically elongated at valve mantles. Occlusion membranes have become corroded more or less strongly.</p> <p>Type: slide no. 15645m (holotypus here designated see Fig. 2) in collection Maxim Kulikovskiy, I.D. Papanin Institute for Biology of Inland Waters, Russian Academy of Sciences (IBIW) 20.07.1965, leg. A.P. Skabitschewsky.</p> <p>Isotype: slide no. 15645a in collection Andrzej Witkowski, Institute of Marine Sciences, University of Szczecin (SZCZ).</p> <p>Distribution: As yet known only from the Lake Baikal.</p> <p>Etymology: This species dedicated to Boris Skvortzow one of the pioneers of the diatomological studies in Lake Baikal.</p>Published as part of <i>Kulikovskiy, Maxim, Lange-Bertalot, Horst & Witkowski, Andrzej, 2013, Gliwiczia gen. nov. a new monoraphid diatom genus from Lake Baikal with a description of four species new for science, pp. 1-16 in Phytotaxa 109 (1)</i> on pages 3-5, DOI: 10.11646/phytotaxa.109.1.1, <a href="http://zenodo.org/record/5078671">http://zenodo.org/record/5078671</a>
Cymatosirella taylorii Dabek & Witkowski 2013, sp. nov.
No full text<i>Cymatosirella taylorii</i> Dąbek & Witkowski <i>sp. nov.</i> (Figs 44–51 [LM], Figs 52–58 [SEM]) <p>Frustules rectangular in girdle view with undulated outline. Valves lanceolate to elliptical, 4–13 µm long and 1–4 µm wide. Central part of valve face and apices elevated. Valve surface areolated, with ca. 50 areolae in 10 µm. Areolae distributed over the whole valve face.</p> <p> <b>Type:</b> — SOUTH AFRICA. Western Cape Province: eastern part of Langebaan Lagoon, Saldanha Bay, sandy sediment from the intertidal sandbank (33°6’788’’S; 18°2’631’’E) collected on 19 th February 2011 by Dąbek, Witkowski & Archibald (SZCZ 17582, holotype!).</p> <p> <b>Habitat:</b> —The eastern part of Langebaan Lagoon is a shallow, sandy tidal pool. High and low tide occur twice a day. Sea surface water temperature exceeds 18° C</p> <p> <b>Etymology:</b> —Named after and dedicated to our friend and prominent South African diatomologist Dr. Jonathan Taylor (North-West University, Potchefstroom, South Africa).</p> <p> <b>Observations:</b> —The frustules are rectangular in girdle view with an undulated outline (Figs 44–47, 52). Cells are predominantly solitary, but occasionally two cells were found joined together (Fig. 44). The girdle is broad, and composed of numerous bands bearing one row of fine puncta (Fig. 52). The valves are lanceolate to elliptical, 4–13 µm long and 1–4 µm wide (Figs 48–51, 53). The central part of the valve face and apices are elevated (Figs 54, 56). The valve surface is strongly ornamented with areolae, ca. 50 in 10 µm (Figs 53–56). Near the central elevation, areolae are randomly distributed; further towards the apices they are arranged in longitudinal rows (Figs 53, 55, 56). Occlusions have not been observed. Each valve bears two ocelluli, composed of 7–10 porelli, with 1–2 central ones (Figs 57, 58). The ocelluli are surrounded by a hyaline ring of silica (Figs 53, 55, 57). No areolae occur near the ocelluli (Figs 53, 57). Spines were observed only rarely. Processes, pili, fascia nor pseudosepta have not been observed.</p> <p> <b>Ecology and geography:</b> — <i>Cymatosirella taylorii</i> has been found in only one sandy sample (SZCZ 17582, the holotype) from an intertidal sandbank in the eastern part of the Langebaan Lagoon. Only a dozen valves have been found. This species most probably belongs to the epipsammon.</p>Published as part of <i>Dąbek, Przemysław, Sabbe, Koen, Witkowski, Andrzej, Archibald, Colin, Kurzydłowski, Krzyszof J. & Zgłobicka, Izabela, 2013, Cymatosirella Dąbek, Witkowski & Sabbe gen. nov., a new marine benthic diatom genus (Bacillariophyta) belonging to the family Cymatosiraceae, pp. 42-56 in Phytotaxa 121 (1)</i> on page 50, DOI: 10.11646/phytotaxa.121.1.2, <a href="http://zenodo.org/record/5079466">http://zenodo.org/record/5079466</a>
Stictodiscus manilensis D. M. Williams, P. A. Sims, & J. Witkowski 2021, sp. nov.
No full text<i>Stictodiscus manilensis</i> D.M.Williams, P.A.Sims, & J.Witkowski, <i>sp. nov.</i> <p> <b>Type:—</b> Philippines: Manila (‘ Manilla’), (holotype BM Adams F 1148 = Fig. 1, one specimen); BM 5473 (Deby, one specimen), BM 7431 (Deby, one specimen), BM 8865 (Deby, ‘ Manilla’ = Fig. 3, one specimen), BM 10652 (Deby, L.H. 826, two specimens), BM 45641 (Sturt, A578, three specimens), BM 45863 (Sturt A800, one specimen). Singapore: BM 10435 (Deby, L.H. 547, one specimen).</p> <p>Valves circular with flat valve face; mantle distinctive. Valve with small central annulus, radiating network of ‘siliceous bars’ leading to areolae, mostly biseriate. Raised siliceous thickenings surround series of radiating inner areolae, becoming more conspicuous towards valve mantle. No other surface structures.</p>Published as part of <i>Williams, David M., Sims, Pat A. & Witkowski, Jakub, 2021, Notes on the diatom collection of the Natural History Museum, London (BM) V: (a) ' Stictodiscus manillensis' nom. nud., (b) Stictodiscus pantocsekii and ' Stictodiscus pantocsekii var. minor', (c) a note on the name ' Stictodiscella'; and (d) some comments on Jósef Pantocsek's Beiträge zur Kenntnis der Fossilen Bacillarien, pp. 167-174 in Phytotaxa 507 (2)</i> on page 169, DOI: 10.11646/phytotaxa.507.2.4, <a href="http://zenodo.org/record/5425611">http://zenodo.org/record/5425611</a>
Fragilaria labei Witkowski et Metzeltin
No full text<i>Fragilaria labei</i> Witkowski et Metzeltin in Metzeltin & Witkowski <p>Figure 3 (13)</p> <p>Morphometric information: length: 6–12 μm; width: 1.5–2.5 μm; striae in 10 µm: impossible to resolve in light microscopy.</p>Published as part of <i>Ferreira da Silva, Juliana, Oliveira, Maria Angélica, Paidano Alves, Rodrigo, Vestena Cassol, Ana Paula, Ribeiro da Anunciação, Raylane, Pereira da Silva, Eduardo, Schünemann, Adriano Luis & Batista Pereira, Antônio, 2019, Geographic distribution of epilithic diatoms (Bacillariophyceae) in Antarctic lakes, South Shetland Islands, Maritime Antarctica Region, pp. 797-809 in Check List 15 (5)</i> on page 800, DOI: 10.15560/15.5.79
Restitution du décret delphique pour Aristote (correspondance)
No full textWitkowski . Restitution du décret delphique pour Aristote (correspondance). In: Bulletin de correspondance hellénique. Volume 22, 1898. p. 598
UV radiation effects on algal community structure along a latitudinal gradient
No full textBąk M, Dąbek P, Witkowski A, editors. Abstracts of papers to be presented at the 11th International Phycological Congress; 2017 Aug 13-19; Szczecin, Poland. International Phycological Society; 2017. p. 74. (Phycologia; Vol. 56; No. 4)
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