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FIGURES 37–40 in A new species of Cymbella (Cymbellaceae, Bacillariophyceae) from China, possessing valves with both uniseriate and biseriate striae

FIGURES 37–40. Cymbella distalebiseriata sp. nov., internal view, SEM. 37–40. Four apices showing biseriate striae. Scale bars = 5 μm.

FIGURES 32–36 in A new species of Cymbella (Cymbellaceae, Bacillariophyceae) from China, possessing valves with both uniseriate and biseriate striae

FIGURES 32–36. Cymbella distalebiseriata sp. nov., internal view, SEM. 32. A whole valve. 33–36. Four central parts of the valves, showing two to three stigmata (curved arrows) and obscured intermission (arrows). Scale bars =10 μm (32), 5 μm (33–36).

FIGURES 15–18 in A new species of Cymbella (Cymbellaceae, Bacillariophyceae) from China, possessing valves with both uniseriate and biseriate striae

FIGURES 15–18. Cymbella distalebiseriata sp. nov., frustule and girdle view, SEM. 15. Frustule in ventral girdle view. 16. Frustule in side view, note deep mantle on dorsal side. 17–18. Details of Fig. 15, showing apical pore fields, girdle bands and some biseriate striae with their corresponding uniseriate striae on mantle (arrows). Scale bars =10 μm (Figs 15–16), 5 μm (Figs 17–18).

FIGURES 1–14 in A new species of Cymbella (Cymbellaceae, Bacillariophyceae) from China, possessing valves with both uniseriate and biseriate striae

FIGURES 1–14. Cymbella distalebiseriata sp. nov., LM. 1–14. Fourteen valves showing size diminution series. 3. Micrograph of holotype specimen. 5. Micrograph of isotype specimen. Scale bar =10 μm (in Fig. 1) for all figures.

opennotspecifiedApr 2020View details →

FIGURES 19–29. Gomphonema frequentiformis comb. nov. SEM. Fig. 19. External valve outline overview. Sinuous raphe and heteropolar valves. Fig. 20. Internal valve. Fig. 21 in Gomphonema frequentiformis (Metzeltin & Krammer) comb. nov. (Bacillariophyta): ecology and taxonomy of a Neotropical diatom

FIGURES 19–29. Gomphonema frequentiformis comb. nov. SEM. Fig. 19. External valve outline overview. Sinuous raphe and heteropolar valves. Fig. 20. Internal valve. Fig. 21. Detail of central area showing rounded isolated pore ('stigma') and sigmoid slit-like areolae. Striae not interrupted in the valve face-mantle junction. Proximal raphe endings rounded. Figs 22–23. Internal detail of central area showing transversely elongated isolated pore located in a long groove. Strongly hook-shaped proximal raphe ending. Areolar openings are large and round without internal occlusions, located in а deep foraminal row between strongly silicified vimines. Figs 24–27. Detail of apical (24, 25) and footpoles (26, 27) showing the presence of apical pore field on both apices. Raphe slightly curved to the same side. Figs 28–29. Internal detail of both apices showing the helictoglossae and the slit-like internal areolae openings. Note the pseudoseptum present at both apices (a silica plate extending internally from the apical portion of the valve). Scale bars = 10 µm (Figs 19, 20), 4 µm (Fig. 21), 3 µm (Figs 24–27), 2 µm (Figs 22, 23, 28, 29).

opennotspecifiedApr 2020View details →

FIGURES 14–18. SEM, Internal valve views. Fig.14 in Navicula daochengensis sp. nov., a new freshwater diatom species (Bacillariophyceae) from a small mountain lake, Sichuan Province, China

FIGURES 14–18. SEM, Internal valve views. Fig.14. Internal view of complete valve. Fig. 15, 16. Internal details of the central area. Fig. 17, 18. Valve apices. Scale bars = 10 μm (Fig. 14), 2 μm (Figs 15–18).

opennotspecifiedApr 2020View details →

FIGURES 7–13. SEM, External valve views. Fig.7 in Navicula daochengensis sp. nov., a new freshwater diatom species (Bacillariophyceae) from a small mountain lake, Sichuan Province, China

FIGURES 7–13. SEM, External valve views. Fig.7. External view of complete valve. Fig. 8, 9,10. Valve centre exterior. Fig. 11. External view of striae. Fig. 12, 13. External details of the apex. Scale bars = 10 μm (Fig. 7), 2 μm (Figs 8–13)

opennotspecifiedJun 2020View details →

FIGURES 49–59 SEM, internal valve views. Figs 49, 50, 55, 56 in Sichuaniella deqinensis sp. nov., a new diatom species (Bacillariophyceae) from a high altitude lake in the Hengduan Mountains, SW China

FIGURES 49–59 SEM, internal valve views. Figs 49, 50, 55, 56. Internal view of entire valve. Areolae are probably occluded by hymenes internally when uncorroded. White arrows point where can be seen two elliptic cavities. Figs 51, 57, 58. Internal view of raphe with small helictoglossa. Figs 52–54, 57, 59. The central raphe ends are masked by a silica flap. Two elliptic cavities below the flaps are connected with narrow canals in the two peculiar appendices which protrude "pervalvar" into the valve interior. Scale bars = 200 nm (Figs 52, 53), 1 μm (Fig. 49–51, 54–59).

opencc-by-4.0Aug 2024View details →

FEATURES OF THE EXOGRAPHDIAGNOSIS OF POLYMORPHISM OF UTERINE VALVES IN PATIENTS WITH MAYER-ROKITANSKY-KUSTER-HAUSER SYNDROME (LITERATURE REVIEW)

Синдром Майера–Рокитанского–Кюстнера–Хаузера — это врожденный порок развития половых органов, который характеризуется врожденным отсутствием матки и влагалища или отсутствием матки и верхних 2/3 влагалища, нормально функционирующими яичниками у пациенток с женским кариотипом (46, ХХ) и физиологически развитыми вторичными половыми признаками (женский фенотип). [22] Синдром Майера-Рокитанского-Кюстера-Хаузера для которого характерны: – врожденное отсутствие матки и влагалища (матка обычно имеет вид одного или двух рудиментарных мышечных валиков); – нормальная функция яичников; – женский фенотип (нормальное развитие молочных желез, пропорциональное тело, характер оволосения и развитие наружных половых органов по женскому типу); – женский кариотип (46, ХХ); – часто встречающееся сочетание с другими врожденными пороками развития (скелета, органов мочевыделения).

opennotspecifiedFeb 2013View details →

FIGURES 4A–E. SEM, valve interior. Fig. 4A in A new genus and species in the diatom family Eunotiaceae Kützing (Bacillariophyceae) from the Amazonian hydrographic region, Brazil

FIGURES 4A–E. SEM, valve interior. Fig. 4A. Valve view. Scale bar = 20 µm. Figs 4B-D showing apex of valve with raphe branch, helictoglossa and rimoportulae evident. Fig. 4E. Central portion of the valve with interruption of striae evident in the center of the valve. Scale bars = 2 µm for figures 4B–D.

opennotspecifiedFeb 2013View details →

FIGURES 3A–C. SEM, valve exterior. Figs 3A, 3B in A new genus and species in the diatom family Eunotiaceae Kützing (Bacillariophyceae) from the Amazonian hydrographic region, Brazil

FIGURES 3A–C. SEM, valve exterior. Figs 3A, 3B are of the valve apex showing the raphe, presence of siliceouis nodules and spinules on the valve face and external openings of rimoportulae. Fig. 3C. Valve center showing sternum positioned about at the center of the valve. Areolae are small, round. Scale bars = 2 µm for all figures.

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Data from: GATA2 controls lymphatic endothelial cell junctional integrity and lymphovenous valve morphogenesis through miR-126

Mutations in the transcription factor GATA2 cause lymphedema. GATA2 is necessary for the development of lymphatic valves (LVs) and lymphovenous valves (LVVs), and for the patterning of lymphatic vessels. Here, we report that GATA2 is not necessary for valvular endothelial cell (VEC) differentiation. Instead, GATA2 is required for VEC maintenance and morphogenesis. GATA2 is also necessary for the expression of cell junction molecules VE-Cadherin and Claudin5 in lymphatic vessels. We identified miR-126 as a target of GATA2, and miR-126-/- embryos recapitulate the phenotypes of mice lacking GATA2. Primary human lymphatic endothelial cells (HLECs) lacking GATA2 (GATA2ΔHLEC) have altered expression of Claudin5 and VE-Cadherin, and blocking miR-126 activity in HLECs phenocopies these changes in expression. Importantly, overexpression of miR-126 in GATA2ΔHLEC significantly rescues the cell junction defects. Thus, our work defines a new mechanism of GATA2 and uncovers miR-126 as a novel regulator of mammalian lymphatic vascular development.

opencc-zeroOct 2019View details →

opennotspecifiedAug 2013View details →

FIGURES 15–18. Stephanodiscus neoaegypticus v. fekrii, SEM. Fig. 15. External valve with a convex central area. Fig. 16 in Stephanodiscus Ehr. species from Holocene sediments in the Faiyum Depression (Middle Egypt)

FIGURES 15–18. Stephanodiscus neoaegypticus v. fekrii, SEM. Fig. 15. External valve with a convex central area. Fig. 16. Internal valve showing two rimoportulae (arrowed). Fig. 17. Detail of internal marginal zone showing fultoportulae with either three or four satellite pores. Fig. 18. Internal central area fultoportula with two satellite pores. Scale bars = 2 µm (Fig. 15), 5 µm (Fig. 16), and 1 µm (Figs 17, 18).

opennotspecifiedAug 2013View details →

FIGURES 9–14. Stephanodiscus neoaegypticus, SEM. Fig. 9. Iconotype, external valve showing small concentric convex undulation with out spines. Fig. 10 in Stephanodiscus Ehr. species from Holocene sediments in the Faiyum Depression (Middle Egypt)

FIGURES 9–14. Stephanodiscus neoaegypticus, SEM. Fig. 9. Iconotype, external valve showing small concentric convex undulation with out spines. Fig. 10. External valve showing small concentric concave undulation and external rimoportula opening (arrowed). Fig. 11. Internal valve showing sub-marginal rimoportulae (arrowed). Fig. 12. Detail of the same valve showing two sub-marginal rimoportulae and marginal ring fultoportulae. Fig. 13. Detail of the central ring of fultoportulae (each with two satellite pores). Stephanodiscus neoaegypticus v. fekrii SEM. Fig. 14. Iconotype, external valve with a concave central area, marginal ring of fultoportula apertures and external opening of a rimoportula (arrowed). Scale bars = 10 µm (Figs 9–11, 14), 1 µm (Fig. 12), and 2 µm (Fig. 13).

opennotspecifiedDec 2013View details →

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

FIGURES 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.

opennotspecifiedDec 2013View details →

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

FIGURES 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.

FIGURES 23–28 in Valve morphology of three species of Neidiomorpha (Bacillariophyceae) from Zoigê Wetland, China, including description of Neidiomorpha sichuaniana nov. sp.

FIGURES 23–28. SEM micrographs of Neidiomorpha binodis. Fig. 23. External view of the valve, showing external raphe structure and areolation pattern. Fig. 24, Valve terminus showing distal raphe end. Fig. 25. External view of central valve face, with large areolae on the mantle. Fig. 26.Internal view of the valve, with internal raphe structure and central nodule evident. Fig. 27. Distal valve showing helictoglossae and pluriseriate areolation pattern over the shallow cave. Fig. 28. Internal view of central valve showing the central nodule. Scale bars = 5µm (Figs 23, 26); 2µm (Fig. 25); 1µm (Figs 24, 27, 28).

FIGURES 17–22 in Valve morphology of three species of Neidiomorpha (Bacillariophyceae) from Zoigê Wetland, China, including description of Neidiomorpha sichuaniana nov. sp.

FIGURES 17–22. SEM micrographs of Neidiomorpha sichuaniana. Fig. 17.External view of the valve (note external raphe structure and areolation pattern). Fig. 18.Valve terminus showing distal raphe end. Note uniseriate areolae foramina forming 1–6 larger unoccluded apertures near the sternum becoming abruptly and distinctly smaller towards and onto the valve mantle. Fig. 19. Central area showing deflected proximal raphe ends. Fig. 20. Internal view of the valve showing internal raphe structure and central nodule. Fig. 21, Distal end showing helictoglossaee and the longitudinal caves. Fig. 22. Internal view of valve center showing the central nodule and inside pluriseriate areolation pattern over the shallow cave in the mantle. Scale bars = 5µm (Figs 17, 20); 1µm (Figs 18, 19, 21, 22).

FIGURES 29–33 in Valve morphology of three species of Neidiomorpha (Bacillariophyceae) from Zoigê Wetland, China, including description of Neidiomorpha sichuaniana nov. sp.

FIGURES 29–33. SEM micrographs of Neidiomorpha binodiformis. Fig. 29. External view of the valve. Fig. 30. Valve terminus showing distal raphe end. Fig. 31. External view of central valve face, with large areolae on the mantle. Fig. 32. Internal view of the valve, distal valve showing helictoglossae and inside pluriseriate areolation pattern over the shallow cave. Fig. 33. Internal view of central valve showing the central nodule. Scale bars = 5µm (Fig. 29); 1µm (Figs 30–33).

FIGURES 1–16 in Valve morphology of three species of Neidiomorpha (Bacillariophyceae) from Zoigê Wetland, China, including description of Neidiomorpha sichuaniana nov. sp.

FIGURES 1–16. LM micrographs of Neidiomorpha sichuaniana, N. binodis and N. binodifomis. Figs 1–7: Neidiomorpha sichuaniana. Fig 2: Holotype specimen. Figs 8–13: Neidiomorpha binodis. Figs 14–16: Neidiomorpha binodifomis. Scale bars = 10µm.