CLASSIFICATION OF SEDIMENTARY ENVIRONMENTS

1972 ◽  
pp. 4-11 ◽  
Author(s):  
ELEANOR J. CROSBY
Keyword(s):  
Sedimentary Environments

scholarly journals MÉTODOS CLÁSSICOS DE SEDIMENTOLOGIA APLICADOS À IDENTIFICAÇÃO DE DEPÓSITOS COSTEIROS COMO FERRAMENTA AO LICENCIAMENTO AMBIENTAL (CLASSICAL METHODS OF SEDIMENTOLOGY APPLIED TO THE IDENTIFICATION OF COASTAL DEPOSITS AS A TOOL TO THE ENVIRONMENTAL LICENSING)

2019 ◽  
pp. 180-199
Author(s):  
Renata Cardia Rebouças ◽  
Felipe Castro
Keyword(s):  
Coastal Plain ◽  
Sand Dunes ◽  
Environmental Conservation ◽  
Coastal Environments ◽  
Beach Ridges ◽  
Sedimentary Environments ◽  
Natural Range ◽  
Sedimentary Deposit ◽  
Coastal Deposits

RESUMO:A classificação de ambientes costeiros pode ser uma tarefa complexa. O estudo da geomorfologia na identificação de ambientes sedimentares necessita de uma validação. Não raro, feições como cordões litorâneos são confundidas com dunas. O depósito sedimentar em forma de dunas fica melhor caracterizado quando realizados estudos sedimentológicos, nos quais são observados os parâmetros granulométricos e a morfoscopia dos grãos. Neste trabalho estes métodos clássicos de sedimentologia foram aplicados aos sedimentos de testemunhos coletados na planície costeira da localidade de Mosqueiro (SE). A análise granulométrica e morfoscópica mostrou que, apesar de os sedimentos possuírem algumas características peculiares às areias de dunas, como uma granulometria fina, assimetria positiva tendendo para os finos e distribuição leptocúrtica da curva gaussiana, os sedimentos apresentam outras características como a seleção moderada e a superfície predominantemente polida que indicam que estes depósitos não foram formados exclusivamente pelo transporte eólico. O transporte misto, ora pela água, ora pelo vento, aponta para um ambiente de cordões litorâneos. Embora estes depósitos não tenham sido considerados dunas, é importante não construir na faixa de variação natural da praia para se evitar problemas com erosão costeira, bem como garantir a conservação ambiental e a segurança das pessoas e do patrimônio.Palavras-chave: Granulometria; Morfoscopia; Dunas; Cordões Litorâneos. ABSTRACT:The classification of coastal environments could be a complex task. The study of geomorphology in the identification of sedimentary environments requires validation. Often, features like beach ridges are confused with dunes. The sedimentary deposit in the form of dunes is better characterized when sedimentological studies are carried out, in which granulometric parameters and grain morphoscopy are observed. In this work, these classical methods of sedimentology were applied to the sediments of the samples collected in the coastal plain of Mosqueiro (SE). The granulometric and morphoscopic analysis showed that, although the sediments have some characteristics peculiar to the sand dunes, such as fine granulometry, positive asymmetry tending to the fines and leptokurtic distribution of the Gaussian curve, the sediments present other characteristics such as moderate selection and surface that indicate that these deposits were not formed exclusively by the wind transport. The mixed transport, sometimes by the water, or by the wind, points to an environment of coastal strings. Although these deposits have not been considered as dunes, it is important not to build on the natural range of the beach to avoid problems with coastal erosion, as well as to guarantee environmental conservation and the safety of people and property.Keywords: Granulometry; Morphoscopy; Dune; Beach Ridges.

Note on the spectral classification of carbon stars in the photographic infrared region

1966 ◽  
Vol 24 ◽  
pp. 21-23
Author(s):  
Y. Fujita
Keyword(s):  
Infrared Region ◽  
Spectral Classification ◽  
Carbon Stars

We have investigated the spectrograms (dispersion: 8Å/mm) in the photographic infrared region fromλ7500 toλ9000 of some carbon stars obtained by the coudé spectrograph of the 74-inch reflector attached to the Okayama Astrophysical Observatory. The names of the stars investigated are listed in Table 1.

Diagnostic Value of Electron Microscopy in Soft Tissue Tumors

1970 ◽  
Vol 28 ◽  
pp. 220-221
Author(s):  
Gerald Fine ◽  
Azorides R. Morales
Keyword(s):  
Cardiac Myxoma ◽  
Osteogenic Sarcoma ◽  
Diagnostic Value ◽  
Soft Tissue Tumors ◽  
Amelanotic Melanoma ◽  
Growth Patterns ◽  
Light Microscopic Level ◽  
Mesenchymal Tumors ◽  
Good Agreement

For years the separation of carcinoma and sarcoma and the subclassification of sarcomas has been based on the appearance of the tumor cells and their microscopic growth pattern and information derived from certain histochemical and special stains. Although this method of study has produced good agreement among pathologists in the separation of carcinoma from sarcoma, it has given less uniform results in the subclassification of sarcomas. There remain examples of neoplasms of different histogenesis, the classification of which is questionable because of similar cytologic and growth patterns at the light microscopic level; i.e. amelanotic melanoma versus carcinoma and occasionally sarcoma, sarcomas with an epithelial pattern of growth simulating carcinoma, histologically similar mesenchymal tumors of different histogenesis (histiocytoma versus rhabdomyosarcoma, lytic osteogenic sarcoma versus rhabdomyosarcoma), and myxomatous mesenchymal tumors of diverse histogenesis (myxoid rhabdo and liposarcomas, cardiac myxoma, myxoid neurofibroma, etc.)

Ultrastructure of mesotheliomas

1984 ◽  
Vol 42 ◽  
pp. 98-101
Author(s):  
Irving Dardick
Keyword(s):  
Electron Microscopy ◽  
Latent Period ◽  
Spindle Cell ◽  
Spindle Cell Sarcoma ◽  
Metastatic Adenocarcinoma ◽  
Cell Sarcoma ◽  
Cytological Features ◽  
Industrial Use ◽  
Degree Of Differentiation

With the extensive industrial use of asbestos in this century and the long latent period (20-50 years) between exposure and tumor presentation, the incidence of malignant mesothelioma is now increasing. Thus, surgical pathologists are more frequently faced with the dilemma of differentiating mesothelioma from metastatic adenocarcinoma and spindle-cell sarcoma involving serosal surfaces. Electron microscopy is amodality useful in clarifying this problem.In utilizing ultrastructural features in the diagnosis of mesothelioma, it is essential to appreciate that the classification of this tumor reflects a variety of morphologic forms of differing biologic behavior (Table 1). Furthermore, with the variable histology and degree of differentiation in mesotheliomas it might be expected that the ultrastructure of such tumors also reflects a range of cytological features. Such is the case.

Interpreting HVEM of muscle-cell impulse networks

1992 ◽  
Vol 50 (1) ◽  
pp. 126-127
Author(s):  
Paul DeCosta ◽  
Kyugon Cho ◽  
Stephen Shemlon ◽  
Heesung Jun ◽  
Stanley M. Dunn
Keyword(s):  
Structural Analysis ◽  
Muscle Cell ◽  
Electron Micrographs ◽  
Relative Size ◽  
Automatic Classification ◽  
Nerve Fibers ◽  
Analysis Algorithm ◽  
Structural Networks

Introduction: The analysis and interpretation of electron micrographs of cells and tissues, often requires the accurate extraction of structural networks, which either provide immediate 2D or 3D information, or from which the desired information can be inferred. The images of these structures contain lines and/or curves whose orientation, lengths, and intersections characterize the overall network.Some examples exist of studies that have been done in the analysis of networks of natural structures. In, Sebok and Roemer determine the complexity of nerve structures in an EM formed slide. Here the number of nodes that exist in the image describes how dense nerve fibers are in a particular region of the skin. Hildith proposes a network structural analysis algorithm for the automatic classification of chromosome spreads (type, relative size and orientation).

Dual stain kit for the microscopic gram classification of ocular infection bacteria

1993 ◽  
Vol 51 ◽  
pp. 248-249
Author(s):  
Jacob S. Hanker ◽  
Dale N. Holdren ◽  
Kenneth L. Cohen ◽  
Beverly L. Giammara
Keyword(s):  
Contact Lenses ◽  
Ocular Infection ◽  
Gram Negative Bacteria ◽  
Gram Negative ◽  
Gram Staining ◽  
Ocular Infections ◽  
Different Types ◽  
Culture Positive ◽  
Increased Susceptibility

Keratitis and conjunctivitis (infections of the cornea or conjunctiva) are ocular infections caused by various bacteria, fungi, viruses or parasites; bacteria, however, are usually prominent. Systemic conditions such as alcoholism, diabetes, debilitating disease, AIDS and immunosuppressive therapy can lead to increased susceptibility but trauma and contact lens use are very important factors. Gram-negative bacteria are most frequently cultured in these situations and Pseudomonas aeruginosa is most usually isolated from culture-positive ulcers of patients using contact lenses. Smears for staining can be obtained with a special swab or spatula and Gram staining frequently guides choice of a therapeutic rinse prior to the report of the culture results upon which specific antibiotic therapy is based. In some cases staining of the direct smear may be diagnostic in situations where the culture will not grow. In these cases different types of stains occasionally assist in guiding therapy.

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