1,720,965 research outputs found
FIGURES 64–69 in New and Interesting Diatoms (Bacillariophyta) from Blue Lake Warm Springs, Tooele County, Utah
No full textFIGURES 64–69. LM. Naviculonema stagnora. Valve views showing the size diminution series. Figure 67 is the holotype. Scale bar: 10 µm.Published as part of GRAEFF, C. L., KOCIOLEK, J.P. & RUSHFORTH, S.R., 2013, New and Interesting Diatoms (Bacillariophyta) from Blue Lake Warm Springs, Tooele County, Utah, pp. 1-38 in Phytotaxa 153 (1) on page 14, DOI: 10.11646/phytotaxa.153.1.1, http://zenodo.org/record/510068
FIGURES 33–37 SEM. Williamsella angusta. Internal views showing valves from five specimens. Fig. 33 in New and Interesting Diatoms (Bacillariophyta) from Blue Lake Warm Springs, Tooele County, Utah
No full textFIGURES 33–37 SEM. Williamsella angusta. Internal views showing valves from five specimens. Fig. 33, Full valve view of a large specimen with subcapitate apices. Fig. 34, Apex showing the raised rimoportula. Fig. 35, Apex showing the linear opening of the rimoportula. Fig. 36, An apex without a rimoportula. Fig. 37, Unpaired striae and shortened striae near the valve center. Scale bars: Fig. 33: 10 µm; Figs. 34–37: 0.5 µm.Published as part of GRAEFF, C. L., KOCIOLEK, J.P. & RUSHFORTH, S.R., 2013, New and Interesting Diatoms (Bacillariophyta) from Blue Lake Warm Springs, Tooele County, Utah, pp. 1-38 in Phytotaxa 153 (1) on page 8, DOI: 10.11646/phytotaxa.153.1.1, http://zenodo.org/record/510068
FIGURES 9–12. SEM. Cyclotella utahensis. External and girdle views. Fig. 9 in New and Interesting Diatoms (Bacillariophyta) from Blue Lake Warm Springs, Tooele County, Utah
No full textFIGURES 9–12. SEM. Cyclotella utahensis. External and girdle views. Fig. 9, Full valve view showing undulate and mottled valve face. Fig. 10, Full valve view showing external opening of the central fultoportula (white arrow). Fig. 11, Girdle view showing open girdle bands. Fig. 12, External view with nodules and external openings of the marginal fultoportulae (white arrows) and the rimoportula (black arrow). Scale bars: 1 µm.Published as part of GRAEFF, C. L., KOCIOLEK, J.P. & RUSHFORTH, S.R., 2013, New and Interesting Diatoms (Bacillariophyta) from Blue Lake Warm Springs, Tooele County, Utah, pp. 1-38 in Phytotaxa 153 (1) on page 4, DOI: 10.11646/phytotaxa.153.1.1, http://zenodo.org/record/510068
FIGURES 151–154 in New and Interesting Diatoms (Bacillariophyta) from Blue Lake Warm Springs, Tooele County, Utah
No full textFIGURES 151–154. SEM. Nitzschia vitrea. Internal valve views of three specimens. Fig. 151, Full valve showing variably spaced fibulae. Fig. 152, Tilted specimen showing striae that continue across roughly ⅔ of the valve mantle. Fig. 153, Apex with small helictoglossa and prominent fibula. Fig. 154, Central area showing elongate areolae and striae that are interrupted at the fibulae. Scale bars: Fig. 151: 20 µm; Fig. 152 µm: 10; Figs 153–154: 1 µm.Published as part of GRAEFF, C. L., KOCIOLEK, J.P. & RUSHFORTH, S.R., 2013, New and Interesting Diatoms (Bacillariophyta) from Blue Lake Warm Springs, Tooele County, Utah, pp. 1-38 in Phytotaxa 153 (1) on page 31, DOI: 10.11646/phytotaxa.153.1.1, http://zenodo.org/record/510068
FIGURES 13–18. SEM. Cyclotella utahensis. Internal views. Fig. 13 in New and Interesting Diatoms (Bacillariophyta) from Blue Lake Warm Springs, Tooele County, Utah
No full textFIGURES 13–18. SEM. Cyclotella utahensis. Internal views. Fig. 13, Full valve showing relative positions of the central fultoportula and the rimoportula (black arrow). Fig. 14, Full valve of a small specimen lacking obviously recessed ribs. Fig. 15, A large specimen with two central fultoportulae and two recessed ribs between some primary ribs. Fig. 16, Areolae with cribra visible between ribs. Fig. 17, View of the sessile rimoportula and two recessed ribs between a pair of primary ribs. Fig. 18, Marginal fultoportulae with three satellite pores. Scale bars: Figs 13–15: 1 µm; Fig. 16: 0.1 µm; Figs. 17–18: 0.5 µm.Published as part of GRAEFF, C. L., KOCIOLEK, J.P. & RUSHFORTH, S.R., 2013, New and Interesting Diatoms (Bacillariophyta) from Blue Lake Warm Springs, Tooele County, Utah, pp. 1-38 in Phytotaxa 153 (1) on page 5, DOI: 10.11646/phytotaxa.153.1.1, http://zenodo.org/record/510068
FIGURES 70–72 in New and Interesting Diatoms (Bacillariophyta) from Blue Lake Warm Springs, Tooele County, Utah
No full textFIGURES 70–72. SEM. Naviculonema stagnora. External valve views of two specimens. Fig. 70, Full external valve with distal raphe ends deflected in the same direction and irregularly-shaped central area. Fig. 71, C-shaped, occluded areolae. Fig 72, Straight proximal raphe ends and an isolated areola at the central area. Scale bars: Fig. 70: 5 µm; Figs 71–72: 1 µm.Published as part of <i>GRAEFF, C. L., KOCIOLEK, J.P. & RUSHFORTH, S.R., 2013, New and Interesting Diatoms (Bacillariophyta) from Blue Lake Warm Springs, Tooele County, Utah, pp. 1-38 in Phytotaxa 153 (1)</i> on page 15, DOI: 10.11646/phytotaxa.153.1.1, <a href="http://zenodo.org/record/5100682">http://zenodo.org/record/5100682</a>
FIGURES 28–32. SEM. Williamsella angusta. External views showing valves from four specimens and the cingulum. Fig. 28 in New and Interesting Diatoms (Bacillariophyta) from Blue Lake Warm Springs, Tooele County, Utah
No full textFIGURES 28–32. SEM. Williamsella angusta. External views showing valves from four specimens and the cingulum. Fig. 28, Full valve view of a large specimen with narrow apices. Fig. 29, View showing the external opening of the rimoportula and occluded areolae. Fig. 30, An apex with no rimoportula and the structure of the areolae beneath eroded occlusions. Fig. 31, Striae at the valve center sitting between very slight transapical ribs. Fig. 32, Components of the cingulum each with a row of occluded areolae of variable size. Scale bars: Fig. 28: 10 µm; Figs 29–32: 0.5 µm.Published as part of GRAEFF, C. L., KOCIOLEK, J.P. & RUSHFORTH, S.R., 2013, New and Interesting Diatoms (Bacillariophyta) from Blue Lake Warm Springs, Tooele County, Utah, pp. 1-38 in Phytotaxa 153 (1) on page 7, DOI: 10.11646/phytotaxa.153.1.1, http://zenodo.org/record/510068
FIGURES 145–150 in New and Interesting Diatoms (Bacillariophyta) from Blue Lake Warm Springs, Tooele County, Utah
No full textFIGURES 145–150. SEM. Nitzschia vitrea. External views of six specimens. Fig. 145, View of the valve face with interrupted striae. Fig. 146, Girdle view of a valve showing the prominent keel and constriction at the valve center. Fig. 147, Valve view of the apex with the raphe positioned at the top of the keel. Fig. 148, Side view of the apex showing a complete row of areolae closest to the raphe and the hyaline region along the edge of the mantle. Fig. 149, Valve center with continuous raphe. Fig. 150, Broken valve showing the areola openings narrowing on inside of the valve. Scale bars: Figs 145–146: 20 µm; Figs 147–150: 1 µm.Published as part of GRAEFF, C. L., KOCIOLEK, J.P. & RUSHFORTH, S.R., 2013, New and Interesting Diatoms (Bacillariophyta) from Blue Lake Warm Springs, Tooele County, Utah, pp. 1-38 in Phytotaxa 153 (1) on page 30, DOI: 10.11646/phytotaxa.153.1.1, http://zenodo.org/record/510068
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
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