The common mussel Mytilus edulis as an indicator of pollution by zinc, cadmium, lead and copper. II. Relationship of metals in the mussel to those discharged by industry

1976 ◽  
Vol 38 (1) ◽  
pp. 71-80 ◽  
Author(s):  
D. J. H. Phillips
Keyword(s):  
Mytilus Edulis ◽  
Zinc Cadmium ◽  
The Common ◽  
Cadmium Lead ◽  
Relationship Of

An Analysis of the Microgrowth Bands in the Shell of the Common MusselMytilus Edulis

1989 ◽  
Vol 69 (2) ◽  
pp. 477-491 ◽  
Author(s):  
C.A. Richardson
Keyword(s):  
Mytilus Edulis ◽  
Growth Patterns ◽  
Structural Elements ◽  
Tapes Philippinarum ◽  
Thin Sections ◽  
Growth Increments ◽  
Hard Shell ◽  
The Common ◽  
Relationship Of ◽  
Improved Methods

The periodicity of microgrowth patterns observed in thin sections and acetate peel replicas of radial sections of bivalve shells are well documented for both intertidal and subtidal species (Pannella & MacClintock, 1968; Rhoads & Pannella, 1970; Evans, 1972, 1975; Kennish, 1980; Richardsonet al., 1979et seq.; Richardson, 1987a, b, 1988, b). In many species daily or tidal lines are well preserved in the shell, for example, the hard-shell clamMercenaria mercenaria(Pannella & MacClintock, 1968), the cockleCerastoderma edule(Richardsonet al., 1979) and the clamTapes philippinarum(Richardson, 1987a, 1988b), while in others they are poorly preserved or lacking. Such an example is the common musselMytilus edulis(L.) where fine growth lines seen in acetate peel replicas have previously been reported to be poorly preserved, with long continuous sequences of such lines seldom occurring (Lutz, 1976). The angular relationship of growth lines to the growing margin and to the crystalline elements of the shell structure are presumed to be the factors influencing the resolution of growth increments (MacClintock, 1967; Pannella & MacClintock, 1968). Pannella & MacClintock (1968) suggest that the larger the angle between depositional surfaces and the structural elements of a shell layer the more evident will be the growth increments. Both oysters and mussels have an unfavourable angular relationship between growth increments and the margin of the shell (Pannella & MacClintock, 1968) and this may explain why the growth lines are difficult to observe. The present paper describes improved methods used to examine the internal micro478 growth patterns in the shell of the common musselMytilus edulisand reports on experiments to investigate the periodicity of the patterns.

The Red Neuronal Pigment in the Nervous System of the Mussel, Mytilus Edulis: Localization and Its Effect on Lateral Ciliary Activity with Spectral and Analytical Changes

1981 ◽  
Vol 39 ◽  
pp. 494-495
Author(s):  
Anthony A. Paparo ◽  
Judith A. Murphy
Keyword(s):  
Nervous System ◽  
Mytilus Edulis ◽  
Neuronal Cell ◽  
Ciliary Activity ◽  
Neuronal Cell Bodies ◽  
The Central Nervous System ◽  
Intracellular Organelles ◽  
The Common ◽  
The Individual ◽  
Cryostat Sections

The purpose of this study was to localize the red neuronal pigment in Mytilus edulis and examine its role in the control of lateral ciliary activity in the gill. The visceral ganglia (Vg) in the central nervous system show an over al red pigmentation. Most red pigments examined in squash preps and cryostat sec tions were localized in the neuronal cell bodies and proximal axon regions. Unstained cryostat sections showed highly localized patches of this pigment scattered throughout the cells in the form of dense granular masses about 5-7 um in diameter, with the individual granules ranging from 0.6-1.3 um in diame ter. Tissue stained with Gomori's method for Fe showed bright blue granular masses of about the same size and structure as previously seen in unstained cryostat sections.Thick section microanalysis (Fig.l) confirmed both the localization and presence of Fe in the nerve cell. These nerve cells of the Vg share with other pigmented photosensitive cells the common cytostructural feature of localization of absorbing molecules in intracellular organelles where they are tightly ordered in fine substructures.

The International IP System: From Continuity to Resilience

2017 ◽  
Author(s):  
Henning Grosse Ruse-Khan
Keyword(s):  
Nineteenth Century ◽  
Intellectual Property ◽  
International Law ◽  
Revolutionary Change ◽  
Minimum Standards ◽  
Multilateral System ◽  
Common Goals ◽  
The Common ◽  
Relationship Of

This chapter looks at how rule-relations within the international intellectual property (IP) system have developed from continuity (in constantly raising minimum standards) to resilience (against certain forms of increasing protection). It considers the evolution of the international IP system from the nineteenth century onwards, examining how each succeeding changes and additions to the system had established a relationship of continuity which integrates existing standards and adds new ones. The chapter then turns to the emergence of another revolutionary change. The integral nature of the common goals established in TRIPS’ object and purpose creates a form of ‘resilience’ of the multilateral system over attempts for inter-se modifications. Moreover, international law has appropriate tools so that those charged with applying, implementing, and interpreting multilateral IP norms can give effect to this resilience both in relations of interpretation and relations of conflict.

Pensare Dio. Spunti di riflessione in dialogo con Anca Vasiliu

Elenchos ◽  
2020 ◽  
Vol 41 (1) ◽  
pp. 181-194
Author(s):  
Angela Longo
Keyword(s):  
Late Antiquity ◽  
Human Being ◽  
Common Thread ◽  
Critical Issues ◽  
Relevant Topic ◽  
The Common ◽  
The One ◽  
Relationship Of ◽  
The Relationship ◽  
The Trinity

AbstractThe following work features elements to ponder and an in-depth explanation taken on the Anca Vasiliu’s study about the possibilities and ways of thinking of God by a rational entity, such as the human being. This is an ever relevant topic that, however, takes place in relation to Platonic authors and texts, especially in Late Antiquity. The common thread is that the human being is a God’s creature who resembles him and who is image of. Nevertheless, this also applies within the Christian Trinity according to which, not without problems, the Son is the image of the Father. Lastly, also the relationship of the Spirit with the Father and the Son, always within the Trinity, can be considered as a relationship of similarity, but again not without critical issues between the similarity of attributes, on the one hand, and the identity of nature, on the other.

Further Investigation upon the Water Movements in the English Channel. Drift-Bottle Experiments in the Summers of 1927, 1928 and 1929, with Critical Notes on Drift-Bottle Experiments in General.

1930 ◽  
Vol 17 (1) ◽  
pp. 241-275 ◽  
Author(s):  
J. N. Carruthers
Keyword(s):  
Wind Speed ◽  
North Sea ◽  
English Channel ◽  
The North ◽  
Different Types ◽  
The North Sea ◽  
The Common ◽  
Relationship Of ◽  
Great Simplicity ◽  
Simple Surface

In July–August of three different years common surface-floating bottles were set adrift at International Station E2 (49° 27' N.—4° 42' W.). With them, various types of drag-fitted bottles were also put out. The journeys accomplished are discussed, and the striking differences as between year and year in the case of the common surface floaters, and as between the different types in the same year, are commented upon in the light of the prevailing winds. An inter-relationship of great simplicity is deduced between wind speed and the rate of travel of simple surface floating bottles up-Channel and across the North Sea from the results of experiments carried out in four different summers.

Bioremediation of Acid Mine Drainage in an Uranium Deposit

2007 ◽  
Vol 20-21 ◽  
pp. 248-257 ◽  
Author(s):  
Stoyan N. Groudev ◽  
Plamen S. Georgiev ◽  
Irena Spasova ◽  
Marina Nicolova
Keyword(s):  
Mine Drainage ◽  
Plant Biomass ◽  
Uranium Deposit ◽  
Water Flow Rate ◽  
Ambient Temperatures ◽  
Zinc Cadmium ◽  
Copper Zinc ◽  
Cadmium Lead ◽  
Dead Plant ◽  
The Individual

Acid drainage waters generated in the uranium deposit Curilo, Bulgaria, were treated by means of different passive systems such as natural and constructed wetlands, alkalizing limestone drains, permeable reactive multibarriers and a rock filter, used separately or in different combinations. The waters had a pH in the range of about 2 – 4 and contained radionuclides (uranium, radium), heavy metals (copper, zinc, cadmium, lead, nickel, cobalt, iron, manganese), arsenic and sulphates in concentrations usually much higher than the relevant permissible levels for waters intended for use in agriculture and/or industry. The water flow rate through the individual systems was different and not stable, and varied in the range approximately from 0.02 to 1.5 l/s. Efficient removal of pollutants was achieved by means of these systems during the different climatic seasons, even during the cold winter months at water and ambient temperatures close to 0 oC. The removal was due to different mechanisms but microbial sulphate reduction, biosorption by living and dead plant biomass and chemical neutralization played the main roles.

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