IV.—Notes on Some Hornblende-Bearing Rocks from Inchnadampf

1886 ◽  
Vol 3 (8) ◽  
pp. 346-353 ◽  
Author(s):  
J. J. H. Teall
Keyword(s):  
Microscopic Structure ◽  
Present Communication ◽  
Vesicular Structure ◽  
Northern Highlands

In the present communication I propose to describe the petrographical characters of some hornblende-bearing rocks which occur as intrusive sheets and bosses in the limestones and quartzites of the Assynt district. These rocks have been referred to under various names by the different writers on the geology of the district. Prof. Nicol speaks of them as greenstone and trap, and Sir R. Murchison, as syenitic greenstone. Mr. Hudleston indicates their character more definitely by speaking of them as a “kind of diorite.” Prof. Bonney, in an appendix to Dr. Callaway's paper “On the Newer Gneissic Eocks of the Northern Highlands,” describes the microscopic structure of a specimen from the Traligill Burn near Inchnadampf, and designates the rock a hornblendic porphyrite. Dr. Hoddle gives some valuable information as to the distribution of the rocks, and calls attention to the perfection of form exhibited by the hornblende in certain varieties. He gives a figure of the hornblende which shows the forms (110), (010) and (011). With regard to the relations of the rocks to the associated strata he speaks somewhat doubtfully, but evidently inclines to the view that they are intrusive. That this is the case seems proved by the absence of vesicular structure and associated tuffs, and by the fact that although they keep as a rule parallel with the bedding, cases occasionally occur in which they can be seen to move from one horizon to another.

scholarly journals I.—On “Tasmanite” and Australian “White Coal”

1875 ◽  
Vol 2 (8) ◽  
pp. 337-342 ◽  
Author(s):  
E. T. Newton
Keyword(s):  
New South ◽  
Microscopic Structure ◽  
Present Communication ◽  
The North ◽  
North Side ◽  
South Wales ◽  
Small Seed ◽  
Bituminous Shale ◽  
Satisfactory Account ◽  
The Subject

The two substances known as “Tasmanite” and Australian “White Coal,” which are the subject of the present communication, have a special interest for the geologist on account of the light which they throw upon the microscopio structure and composition of many Coals. My attention was first directed to them when collecting materials for Professor Huxley’s examination into the microscopic structure of Coal. My esteemed colleague, Mr. Etheridge, at that time gave me a specimen of brown laminated substance, labelled “Lignite, the so-called White Coal, Australia,” and drew my attention to the fact that it was very largely composed of small seed-like bodies, very similar to, although smaller than, the macrospores of Flemingites, which are to be seen in many kinds of British Coal. A specimen of this same kind of White Coal is in the Museum of Practical Geology, and is labelled, “ Bituminous Shale (locally called White Coal), New South Wales, Australia.” I have likewise been able to examine the specimen of Tasmanite also in this Museum, which is labelled “ Tasmanite; combustible matter from the river Mersey on the north side of Tasmania; stratum of unknown thickness, but known to extend for some miles. Presented by Sir Won. Denison.” These specimens are very similar in appearance and structure, but the White Coal is softer than the Tasmanite. Chemical analyses of Tasmanite have been published, but I am not aware of any satisfactory account of ’its microscopic structure. The only mention of Australian White Coal with which I am acquainted is that in Prof. Huxley’s lecture on “On the Formation of Coal” (“Contemporary Keview,” Nov. 1870). And there is a figure, of a section and some separated spores, given by Sir C Lyell in the 2nd edition of his Student’s Elements of Geology, 1874.

scholarly journals The microscopic structure of semipermeable membranes and the part played by surface forces in osmosis

1916 ◽  
Vol 92 (641) ◽  
pp. 357-372 ◽  
Keyword(s):  
Colloidal Particles ◽  
Semipermeable Membrane ◽  
Surface Forces ◽  
Microscopic Structure ◽  
Bulk Precipitation ◽  
Present Communication ◽  
Semipermeable Membranes ◽  
Flow Through ◽  
Adsorption Phenomena ◽  
Made In

In the following investigation an attempt has been made to arrive at some of the fundamental facts associated with the mechanism of osmosis. Hitherto very few experimental observations have been made in this connection. Raoult, Flusin, Kahlenburg, and a few others have shown, however, that certain membranes such as copper ferrocyanide obeys Poiseuille's law for the rate of flow through capillary tubes; whilst Beutner, Donnan, and others have proved that certain precipitation membranes can act as electrodes, reversible with respect to various ions. The further questions which are dealt with in the present communication are experimental ones: such as what is the size of the colloidal particles of which a semipermeable membrane is composed, and how is the membrane built up from those particles ; to what extent does a membrane show the properties of the gelatinous precipitates or gels as ordinarily prepared by bulk precipitation, and how does its structure differ from these; how is the structure of the membrane altered by variations in the method of its formation, the nature of the solutions bathing it, and the treatment to which it is subjected; and what is the size of its pores, the extent to which they are under the control of surface forces, and therefore of adsorption phenomena also.

Anchoring Fibrils in Arterial Endothelium

1969 ◽  
Vol 27 ◽  
pp. 274-275
Author(s):  
A. Trillo
Keyword(s):  
Carotid Arteries ◽  
Animal Species ◽  
Cell Layer ◽  
Present Communication ◽  
Internal Elastic Lamina ◽  
Endothelial Cell Layer ◽  
Structural Details ◽  
Rats And Mice ◽  
Arterial Endothelium ◽  
Elastic Lamina

There are conflicting reports regarding some fine structural details of arteries from several animal species. Buck denied the existence of a sub-endothelial space, while Karrer and Keech described a space of variable width which separates the endothelium from the underlying internal elastic lamina in aortas of aging rats and mice respectively.The present communication deals with the ultrastrueture of the interface between the endothelial cell layer and the internal elastic lamina as observed in carotid arteries from rabbits of varying ages.

Ultrastructure of NPC/HK1 cells heterotransplanted in athymic nude mice

1982 ◽  
Vol 40 ◽  
pp. 236-237
Author(s):  
E.C. Chew ◽  
C.L. Li ◽  
D.P. Huang ◽  
H.C. Ho ◽  
L.S. Mak ◽  
...  
Keyword(s):  
Cell Line ◽  
Nude Mice ◽  
Biopsy Specimen ◽  
Epithelial Cell Line ◽  
Present Communication ◽  
Recurrent Tumour ◽  
Athymic Nude Mice ◽  
Cell Line Establishment ◽  
Fine Structures ◽  
Well Differentiated

An epithelial cell line, NPC/HK1, has recently been established from a biopsy specimen of a recurrent tumour of the nasopharynx which was histologically diagnosed as a moderately to well differentiated squamous cell carcinoma. A definite decrease in the amount of tonofilaments and desmosomes in the NPC/HK1 cells during the cell line establishment was observed. The present communication reports on the fine structures of the NPC/HK1 cells heterotraneplanted in athymic nude mice.

An Established Epithelial Cell Line (NPC/HK1) from a Nasopharyngeal Carcinoma - II. A Sem Study

1982 ◽  
Vol 40 ◽  
pp. 224-225
Author(s):  
Li C.L. ◽  
Chew E.C. ◽  
Huang D.P. ◽  
Ho H.C. ◽  
Mak L.S. ◽  
...  
Keyword(s):  
Nasopharyngeal Carcinoma ◽  
Epithelial Cell ◽  
Surface Morphology ◽  
Cell Line ◽  
Epithelial Cell Line ◽  
Present Communication ◽  
Cells In Culture ◽  
Sem Study ◽  
Well Differentiated

An epithelial cell line, NPC/HK1, has recently been successfully established from a nasopharyngeal carcinoma of the moderately to well differentiated squamous type. The present communication reports on the surface morphology of the NPC/HK1 cells in culture.

Convergent Beam Electron Diffraction Zone Axis Pattern Map of Zirconium

1990 ◽  
Vol 48 (2) ◽  
pp. 496-497
Author(s):  
E. Silva ◽  
R. Scozia
Keyword(s):  
Electron Diffraction ◽  
Convergent Beam Electron Diffraction ◽  
Zone Axis ◽  
Pole Piece ◽  
Small Particles ◽  
Present Communication ◽  
Beam Electron ◽  
Zero Layer ◽  
Set Up ◽  
Convergent Beam

The purpose in obtaining zone axis pattern map (zap map) from a given material is to provide a quick and reliable tool to identify cristaline phases, and crystallographic directions, even in small particles. Bend contours patterns and Kossel lines patterns maps from Zr single crystal in the [0001] direction have been presented previously. In the present communication convergent beam electron diffraction (CBED) zap map of Zr will be shown. CBED patterns were obtained using a Philips microscope model EM300, which was set up to carry out this technique. Convergent objective upper pole piece for STEM and some electronic modifications in the lens circuits were required, furthermore the microscope was carefully cleaned and it was operated at a vacuum eminently good.CBED patterns in the Zr zap map consist of zero layer disks, showing fine details within them which correspond to intersecting set of higher order Laue zone (HOLZ) deficiency lines.

A Sensitive On-Grid Immunoelectron Microscopic Procedure for Diagnosis of Rotavirus Infection

1980 ◽  
Vol 38 ◽  
pp. 506-507
Author(s):  
M. F. Miller ◽  
A. R. Rubenstein
Keyword(s):  
Electron Microscopy ◽  
Specific Antibody ◽  
Immune Complexes ◽  
Acute Gastroenteritis ◽  
Plant Viruses ◽  
Aggregation Process ◽  
Microscopic Technique ◽  
Fecal Material ◽  
Present Communication ◽  
Number Of Particles

Studies of rotavirus particles in humans, monkeys and various non-primates with acute gastroenteritis have involved detection of virus in fecal material by electron microscopy. The EM techniques most commonly employed have been the conventional negative staining (Fig. 1) and immune aggregation (Fig. 2) procedures. Both methods are somewhat insensitive and can most reliably be applied to samples containing large quantities of virus either naturaLly or as a result of concentration by ultracentrifugation. The formation of immune complexes by specific antibody in the immune aggregation procedures confirms the rotavirus diagnosis, but the number of particles per given microscope field is effectively reduced by the aggregation process. In the present communication, we describe use of an on-grid immunoelectron microscopic technique in which rotavirus particles are mounted onto microscope grids that were pre-coated with specific antibody. The technique is a modification of a method originalLy introduced by Derrick (1) for studies of plant viruses.

Re-Vegetation of Degraded Hillsides Through Household Tree Planting in Northern Highlands of Ethiopia

2012 ◽  
Vol 2 (3) ◽  
pp. 183-186
Author(s):  
Hailemariam Meaza Gebregergs ◽  
◽  
Girmay Gebresamuel Abraha
Keyword(s):  
Tree Planting ◽  
Northern Highlands

Microscopical Examinations of the Structural Composition of Reconstituted Tobacco Sheets/Mikroskopische Untersuchungen an Tabakfolien

1974 ◽  
Vol 7 (5) ◽  
Author(s):  
R. Jodl ◽  
F. KrülI
Keyword(s):  
Biological Activity ◽  
Microscopic Structure ◽  
Structural Composition ◽  
Reconstituted Tobacco Sheet

AbstractThe present paper shows and discusses microphotographs of the structural composition of reconstituted tobacco sheet. So far as the biological activity of the sheets' smoke condensate had been investigated (5), the authors try to find a relation between the said activity and the microscopic structure.

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