Scanning Electron Microscopy of the Scales of a Fresh Water Fish, Channa Gachua Inhabiting a North-East Indian Hill Stream Contaminated by Municipal Wastes and Other Pollutants

2013 ◽  
Vol 8 (1) ◽  
pp. 21-26 ◽  
Author(s):  
Mary E. Pala ◽  
Sudip Dey ◽  
A. Borkotoki
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Fresh Water ◽  
Fresh Water Fish ◽  
East Indian ◽  
North East ◽  
Water Fish ◽  
Scanning Electron

Using analytical pyrolysis and scanning electron microscopy to evaluate charcoal formation of four wood taxa from the caatinga of north-east Brazil

2020 ◽  
Vol 151 ◽  
pp. 104909 ◽  
Author(s):  
Diego Tamburini ◽  
Caroline R Cartwright ◽  
Peter Gasson ◽  
Jeannette Jacqueline Łucejko ◽  
Claudia Luizon Dias Leme
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Analytical Pyrolysis ◽  
North East ◽  
Scanning Electron

Vincetoxicum luridum (Asclepiadeae, Asclepiadoideae, Apocynaceae), a new and long misunderstood endemic species from Balochistan, Pakistan

Phytotaxa ◽  
2018 ◽  
Vol 357 (2) ◽  
pp. 117 ◽  
Author(s):  
SAYED A. SHAH ◽  
AMIR SULTAN ◽  
JUN WEN ◽  
SURAT U. NISA ◽  
XU SU ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
New Species ◽  
Endemic Species ◽  
Closely Related Species ◽  
North East ◽  
South West ◽  
A New Species ◽  
Scanning Electron

We here describe a new species, Vincetoxicum luridum, from South West Balochistan. Scanning electron microscopy (SEM) of leaves and seeds, palynology and chorology support the recognition of V. luridum. The lurid appearance, dense pubescence and ovate corona lobes readily distinguish V. luridum from the closely related species V. stocksii which is endemic to North East Balochistan. We illustrate V. luridum, and confirm the significance of corona morphology for classification of Vincetoxicum in Pakistan. Presently, the V. arnottianum complex comprise four species with purple flowers viz., V. arnottianum, V. sakesarense, V. luridum and V. stocksii. In this study we also present the geographic distribution and a taxonomic key to the taxa of V. arnottianum complex.

A new genus and some cryptic species of Arctic and boreal calloporid cheilostome bryozoans

2006 ◽  
Vol 86 (5) ◽  
pp. 1035-1046 ◽  
Author(s):  
Piotr Kuklinski ◽  
Paul D. Taylor
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
New Species ◽  
Type Species ◽  
New Genus ◽  
East Greenland ◽  
North East ◽  
Three New Species ◽  
Cheilostome Bryozoans ◽  
Scanning Electron

Study of type and other material using scanning electron microscopy has permitted the recognition of three new species and one new genus of Arctic and boreal calloporid anascans. Originally described from the Gulf of St Lawrence, Callopora whiteavesi is reassigned to Flustrellaria, a calloporid genus not previously reported extant. Material from north-east Greenland misidentified as C. whiteavesi is described as C. weslawski sp. nov. The new genus Septentriopora is introduced for calloporids lacking pore chambers, with a distolateral pair of small interzooidal avicularia that face proximally or proximolaterally, and a reduced ovicell. The type species of Septentriopora, Tegella nigrans, has frequently been misidentified. Many of the supposed records of this species belong to two other species, described here as Septentriopora karasi sp. nov. and S. denisenkoae sp. nov. The apparent ovicell in S. karasi is particularly unusual, being vestigial and kenozooid-like in morphology.

A Viking Age Gold Hoard from Essu, Estonia

2018 ◽  
pp. 145-168
Author(s):  
Ester Oras ◽  
Ivar Leimus ◽  
Lauri Joosu
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Ninth Century ◽  
Energy Dispersive ◽  
Peat Bog ◽  
Viking Age ◽  
North East ◽  
Use Wear ◽  
Formed Part ◽  
Scanning Electron

This chapter presents in full the small gold hoard from Essu, north-east Estonia, on the Vikings’ Austrvegr (eastern route). The hoard was found in a peat bog in the nineteenth century, and comprised six gold pendants dating to around the last quarter of the ninth century. This chapter provides a detailed analysis of the six pendants—one Arabic dinar-pendant and five pendants decorated with filigree and granulation—discussing their decoration and cultural parallels. Results from recent Scanning Electron Microscopy-Energy Dispersive X-Ray Spectroscopy (SEM-EDS) analysis cast new light on the pendants’ production, alloy content, and use-wear. It is suggested that the filigree pendants were manufactured within Scandinavia and originally formed part of an elaborate female necklace, while the dinar-pendant reached Estonia via the Nordic countries. Overall, the hoard illustrates the prominence of gold within the Viking Age display economy. The chapter concludes by discussing the significance of the hoard from a gender perspective, relating it to a wider group of Viking Age ritual deposits of gold female jewellery sets (so-called ‘themed deposits’).

scholarly journals On a hexactinellid sponge aggregation at the Great Meteor seamount (North-east Atlantic)

2015 ◽  
Vol 95 (7) ◽  
pp. 1389-1394 ◽  
Author(s):  
Joana R. Xavier ◽  
Inês Tojeira ◽  
Rob W.M. Van Soest
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Deep Sea ◽  
East Atlantic ◽  
Azores Archipelago ◽  
North East ◽  
Hexactinellid Sponge ◽  
Glass Sponges ◽  
Great Meteor Seamount ◽  
Scanning Electron

Hexactinellids or glass sponges constitute a predominantly deep-sea sponge group typically occurring at bathyal and abyssal depths. Some species form dense populations along the European and African continental slope but the distribution and extent of these populations remains ill known and the driving factors behind their occurrence poorly understood. Here we report an aggregation of the hexactinellid sponge Poliopogon amadou Thomson, 1878 at ~2700 m depth on the Great Meteor seamount, a large seamount located southern of the Azores archipelago. A description of the species, along with scanning electron microscopy of its spicules, is provided.

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