THE CHORIONIC STRUCTURE OF THE EGGS OF SOME SPECIES OF BUMBLEBEES (HYMENOPTERA: APIDAE: BOMBINAE), AND ITS USE IN TAXONOMY

1978 ◽  
Vol 110 (1) ◽  
pp. 71-83 ◽  
Author(s):  
E. H. Salkeld
Keyword(s):  
Fine Structure ◽  
Surface Features ◽  
Species Specific

AbstractThe surface features and the fine structure of the chorion of the bumblebee egg are described. The egg is covered by a reticulum of polygonal cells with elevated walls and with variously shaped protuberances at the wall junctions, except at each pole where the reticulum evanesces, Differences in the shape, size, and surface sculpturing of the protuberances and in the appearance of the walls are species-specific and a key to the eggs of the nine species is provided. The very thin chorion is composed of two parts with a third part comprising the walls of the polygonal cells; the egg possesses no aeropylar openings and micropylar openings were not found.

MICROTYPE EGGS OF SOME TACHINIDAE (DIPTERA)

1980 ◽  
Vol 112 (1) ◽  
pp. 51-83 ◽  
Author(s):  
E. H. Salkeld
Keyword(s):  
Fine Structure ◽  
New Combinations ◽  
Surface Features

AbstractThe chorionic architecture, including the general and fine structure, of the eggshell of the microtype egg of the tachinid Euexorista futilis (Osten Sacken) is described. It is about 220 μm long, flattened dorso-ventrally, and has distinct dorsal and ventral chorions, each of which is differently structured. The surface features of the microtype eggs of an additional 20 tachinid species are described, and the usefulness of these features in taxonomic decisions is discussed. Three new combinations are used: Allophorocera arator (Aldrich), Cyzenis browni (Curran), and Eufrontina mitis (Curran).

scholarly journals Species-specific differences in the fine structure of learning walk elements inCataglyphisants

2017 ◽  
Vol 220 (13) ◽  
pp. 2426-2435 ◽  
Author(s):  
Pauline N. Fleischmann ◽  
Robin Grob ◽  
Rüdiger Wehner ◽  
Wolfgang Rössler
Keyword(s):  
Fine Structure ◽  
Species Specific ◽  
Learning Walk

Otoliths of Common Australian Temperate Fish

2007 ◽  
Author(s):  
Dianne Furlani ◽  
Rosemary Gales ◽  
David Pemberton
Keyword(s):  
Fish Species ◽  
Marine Mammal ◽  
Comparative Anatomy ◽  
Age And Growth ◽  
Accurate Identification ◽  
Fish Prey ◽  
Commercial Fish ◽  
Surface Features ◽  
Species Specific ◽  
Temperate Fish

The accurate identification of fish ‘ear-bones’, known as otoliths, is essential to determine the fish prey of marine and terrestrial predators. Fish otoliths are species-specific when combining size, shape and surface features, and can remain undigested for long periods. As a result, they can indicate which fish make up the diet of various predators, including cephalopod, seabird, marine mammal and fish species. Such studies are crucial for understanding marine ecosystems, and trophodynamics in particular. Increasingly, these methods are being used to understand the diet of some terrestrial predators, also extending to that of humans in archaelogical studies. Otoliths of Common Australian Temperate Fish offers users a verified reference collection to assist in the accurate identification of species and size of fish using otoliths. It covers 141 fish species from a broad geographic range of the Australian temperate region and includes commercial and non-commercial fish species. A standardised written description of the otolith structure, size and surface features is provided for each species. Included are brief distribution and ecology notes, and regression for both otolith and fish lengths, together with high-quality SEM photographs of the otolith described. This guide will be an essential reference for marine scientists and marine mammal researchers; ornithologists, fisheries researchers and fish biologists studying age and growth or comparative anatomy; and archaeologists. Winner of the 2008 Whitley Award for Zoological Manual.

scholarly journals The Diagnostic Potential of Primary Remex Microstructure in Rare Species of Falcons (Falconidae)

2017 ◽  
Vol 12 (3) ◽  
pp. 97-104 ◽  
Author(s):  
E. O. Fadeeva ◽  
V. G. Babenko
Keyword(s):  
Fine Structure ◽  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Rare Species ◽  
Microstructural Characteristics ◽  
Forensic Biology ◽  
Falco Rusticolus ◽  
Diagnostic Potential ◽  
Species Specific ◽  
Scanning Electron

The paper reports on the original findings of scanning electron microscope comparison of the fine structure of primary remiges inFalco rusticolus, F. cherrug, F. peregrinus, and F. rusticolus х F. cherrug. The study identified a number of species-specific microstructural characteristics that show a high diagnostic potential for taxonomic identifications in forensic biology.

scholarly journals Morphofunctional characteristics of leaves and fruits in Maloideae (Rosaceae): a. Microstructure of surface tissues

2019 ◽  
Vol 180 (1) ◽  
pp. 105-112 ◽  
Author(s):  
T. Kh. Kumachova ◽  
A. S. Voronkov ◽  
A. V. Babosha ◽  
A. S. Ryabchenko
Keyword(s):  
Fine Structure ◽  
Middle Part ◽  
Surface Structures ◽  
Mature Leaves ◽  
Epidermal Tissue ◽  
Species Specific ◽  
Wax Deposits ◽  
Life On Earth ◽  
Structural Adaptations ◽  
Harsh Conditions

Background. The formation of cover tissues (epidermis, cork), providing a connection with the environment, in the evolution of flowering plants was one of the main consequences of the transition to life on earth. The epidermis, which emerged as a device for protecting deeper underlying tissues from drying, subsequently acquired additional functions (participation in gas exchange and transpiration, absorption and isolation of certain substances as well as protection from the penetration of pathogens) and became a multifunctional tissue consisting of several types of cells (basic, stomatal, and trichomes). Features of the fine structure of the epidermis are of interest in representatives of the subfamily Maloideae Werber (Rosaceae Juss.), which grow, inter alia in mountain agrobiocenoses with their rather harsh conditions. They extended their area of distribution to various habitats due to the development of structural adaptations that play an important role in the formation of resistance to stressors of different etiologies.Objective. Representatives of 4 genera were chosen as model objects from subfam. Maloideae for the study: Malus domestica Borkh., Pyrus communis L., Cydonia oblonga Mill., and Mespilus germanica L.Materials and methods. Mature leaves and fruits were selected from the middle part of the crown of three model trees of each species. The samples were studied by scanning electron microscopy (SEM), with a freezing attachment.Results. Leaves of Maloideae were found to be hypostomatic, while the abaxial (lower) epidermis is multifunctional: it performs a barrier function together with the cuticle. Formation of the cuticular nature can be attributed to the surface structures: peristomatic rings and ridges as well as radially extending folds, all forming a specific microrelief. The adaxial (upper) and abaxial surfaces clearly differ not only in the features of the structure, but also in the specificity of the microrelief’s arrangement. Species-specific traits were also found in the structure of the surface tissue of the pericarp. M. germanica, unlike the other species, does not have a continuous cuticular cover and wax deposits: most of a mature fruit’s surface is covered with a peeling cork layer. In the study of the surface of C. oblonga fruits, numerous rather large stomata with peristomatic rings and cuticular cushions were found similar to those in leaves.Conclusion. Surface structures of leaves and fruits in subfam. Maloideae include formations of cuticular nature, with different specificities of microrelief shaping due to the functional load of the epidermal tissue and environmental conditions. They can also be involved in building resistance to biotic stressors. The obtained data on the features of the fine structure of surface tissues are of interest for applied and theoretical studies, especially environmental and botanical, relating to taxonomic issues.

The Geosciences Applied to Lunar Exploration

1962 ◽  
Vol 14 ◽  
pp. 169-257 ◽  
Author(s):  
J. Green
Keyword(s):  
Lunar Surface ◽  
Probable Mechanism ◽  
Point Of View ◽  
Lunar Exploration ◽  
Geological Model ◽  
Apply Geophysics ◽  
Surface Features ◽  
The Impact

The term geo-sciences has been used here to include the disciplines geology, geophysics and geochemistry. However, in order to apply geophysics and geochemistry effectively one must begin with a geological model. Therefore, the science of geology should be used as the basis for lunar exploration. From an astronomical point of view, a lunar terrain heavily impacted with meteors appears the more reasonable; although from a geological standpoint, volcanism seems the more probable mechanism. A surface liberally marked with volcanic features has been advocated by such geologists as Bülow, Dana, Suess, von Wolff, Shaler, Spurr, and Kuno. In this paper, both the impact and volcanic hypotheses are considered in the application of the geo-sciences to manned lunar exploration. However, more emphasis is placed on the volcanic, or more correctly the defluidization, hypothesis to account for lunar surface features.

Fine Structure of Platelet Interaction with a New Microcrystalline Collagen Preparation

1974 ◽  
Vol 32 ◽  
pp. 58-59
Author(s):  
W. H. Zucker ◽  
R. G. Mason
Keyword(s):  
Fine Structure ◽  
Platelet Aggregation ◽  
Hydrochloric Acid ◽  
Whole Blood ◽  
Platelet Adhesion ◽  
Hemostatic Agent ◽  
Native Collagen ◽  
Fibrillar Morphology ◽  
Clinical Interest ◽  
New Form

Platelet adhesion initiates platelet aggregation and is an important component of the hemostatic process. Since the development of a new form of collagen as a topical hemostatic agent is of both basic and clinical interest, an ultrastructural and hematologic study of the interaction of platelets with the microcrystalline collagen preparation was undertaken.In this study, whole blood anticoagulated with EDTA was used in order to inhibit aggregation and permit study of platelet adhesion to collagen as an isolated event. The microcrystalline collagen was prepared from bovine dermal corium; milling was with sharp blades. The preparation consists of partial hydrochloric acid amine collagen salts and retains much of the fibrillar morphology of native collagen.

Pituitary Follicular Cells: Their Origin, Possible Function and Fate

1974 ◽  
Vol 32 ◽  
pp. 34-35
Author(s):  
E. Horvath ◽  
K. Kovacs ◽  
G. Penz ◽  
C. Ezrin
Keyword(s):  
Fine Structure ◽  
Secretory Granules ◽  
Follicular Cells ◽  
Human Pituitary ◽  
Rat Pituitary ◽  
Pituitary Glands ◽  
Junctional Complexes

Follicular structures, in the rat pituitary, composed of cells joined by junctional complexes and possessing few organelles and few, if any, secretory granules, were first described by Farquhar in 1957. Cells of the same description have since been observed in several species including man. The importance of these cells, however, remains obscure. While studying human pituitary glands, we have observed wide variations in the fine structure of follicular cells which may lead to a better understanding of their morphogenesis and significance.

Ultrastructure and Staining of Developing Elastic Tissue

1971 ◽  
Vol 29 ◽  
pp. 244-245
Author(s):  
E. N. Albert
Keyword(s):  
Fine Structure ◽  
Phosphotungstic Acid ◽  
Staining Method ◽  
Rat Aorta ◽  
Uranyl Acetate ◽  
The Other ◽  
Elastic Fibers ◽  
Elastic Tissue ◽  
Lead Citrate ◽  
New Born

Silver tetraphenylporphine sulfonate (Ag-TPPS) was synthesized in this laboratory and used as an electron dense stain for elastic tissue (Fig 1). The procedures for the synthesis of tetraphenylporphine sulfonate and the staining method for mature elastic tissue have been described previously.The fine structure of developing elastic tissue was observed in fetal and new born rat aorta using tetraphenylporphine sulfonate, phosphotungstic acid, uranyl acetate and lead citrate. The newly forming elastica consisted of two morphologically distinct components. These were a central amorphous and a peripheral fibrous. The ratio of the central amorphous and the peripheral fibrillar portion changed in favor of the former with increasing age.It was also observed that the staining properties of the two components were entirely different. The peripheral fibrous component stained with uranyl acetate and/or lead citrate while the central amorphous portion demonstrated no affinity for these stains. On the other hand, the central amorphous portion of developing elastic fibers stained vigorously with silver tetraphenylporphine sulfonate, while the fibrillar part did not (compare figs 2, 3, 4). Based upon the above observations it is proposed that developing elastica consists of two components that are morphologically and chemically different.

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