Oyster Shell
Mostrando 1-12 de 14 artigos, teses e dissertações.
-
1. Sexual and reproductive traits of the pearl oyster shrimp Pontonia margarita (Decapoda: Palemonidae), symbiotically inhabiting the mantle cavity of the rugose pen shell Pinna rugosa (Bivalvia: Pinnidae)
ABSTRACT Symbiosis between decapods and mollusks provides a unique opportunity to examine some of the evolutionary strategies employed by marine invertebrates. We describe the sexual and reproductive traits of the pearl oyster shrimp, Pontonia margarita Verril, 1869, found symbiotically inhabiting the mantle cavity of the rugose pen shell, Pinna rugosa Sower
Zoologia (Curitiba). Publicado em: 13/06/2019
-
2. Calcium particle size and feeding time influence egg shell quality in laying hens
ABSTRACT. An experiment with Leghorn laying hens was undertaken to determine the effect of oyster shell particle size and feeding time on different production variables, calcium retention, plasma calcium content and egg internal and external quality. Two hundred Leghorn layers (40 weeks old old) were allocated in five dietary treatments with four replicates
Acta Sci., Anim. Sci.. Publicado em: 25/02/2019
-
3. Characterization of calcium carbonate obtained from oyster and mussel shells and incorporation in polypropylene
There is a high content of calcium carbonate in mussel and oyster shells, which can be used in the formulation of medicine, in construction or as filler in polymer materials. This work has as its main objective to obtain calcium carbonate from mussel and oyster shells and used as filler in polypropylene compared their properties with polypropylene and commer
Materials Research. Publicado em: 14/02/2012
-
4. Limestone and oyster shell for brown layers in their second egg production cycle
This study aimed at evaluating the effect of dietary calcium levels and the replacement of calcium sources with different particle size compositions on the performance and egg quality of brown layers in their second egg production cycle. A randomized block experimental design was applied with 12 treatments in a 3x4 factorial arrangement: three calcium levels
Revista Brasileira de Ciência Avícola. Publicado em: 2011-06
-
5. PolidorÃdeos (Polychaeta: spionidae) em Crassostrea rhizophorae (Mollusca: bivalvia) de cinco rios da costa pernambucana
The Crassostrea rhizophorae occurs along the coast of Brazil serving as food to coastal communities and its production helps the local socio-economic development. Polydiariosis is one of several diseases in the world oyster culture. This disease is caused by a polychaete which drills the shell and inhabits a mud blister inside the oyster; thus, the oysterâs
Publicado em: 2009
-
6. CaracterizaÃÃo de diferentes granulados e comprimidos de carbonato de cÃlcio a partir do pà de concha de ostras / CHARACTERIZATION OF DIFFERENT GRANULATES AND TABLETS OF CALCIUM CARBONATE FROM OYSTER SHELL POWDER
Osteoporosis is a progressive systemic skeletal disease, characterized by bone mass reduction and deterioration of the bone micro-architecture, leading to fragility and with consequent increase of fracture susceptibility. The preliminary and secondary target of pharmacotherapy in osteoporosis is to prevent bone fractures. Initial treatment of osteoporosis mu
Publicado em: 2007
-
7. Estudo do metabolismo do fósforo utilizando modelos matemáticos / Phosphorus kimetics using mathematical models
The phosphorus (P) is responsible for essential functions in ruminants as such energy transportation, phospholipids formation and buffer effect on rumen. The lack of this mineral can impair appetite therefore causing loss of weigh. However the excess of P provided leads to losses through excretion that can cause pollution when it reaches river and stream wat
Publicado em: 2006
-
8. Research on eggshell structure and quality: an historical overview
The eggshell is an important structure for two reasons. Firstly it forms an embryonic chamber for the developing chick, providing mechanical protection and a controlled gas exchange medium. Secondly it is a container for the market egg, providing protection of the contents and a unique package for a valuable food. The superficial structure of the shell has b
Revista Brasileira de Ciência Avícola. Publicado em: 2005-06
-
9. Influence of organic modifiers for lead determination in calcium supplements by GF AAS / Influência de modificadores orgânicos na determinação de chumbo em amostras de suplementos de cálcio por GF AAS
The main goal of this study was to evaluate the effect of organic modifiers in the determination of lead in calcium supplement samples by graphite furnace atomic absorption spectrometry (GF AAS). Samples of refined calcium carbonate, dolomite and oyster shell were used in this study. For this purpose different decomposition procedures as well as different mo
Publicado em: 2004
-
10. THE COMPOSITION OF FOSSIL OYSTER SHELL PROTEINS*
Analyses of the protein residues recovered from fossil oyster shells of ages from the Pleistocene through the Cretaceous show substantially the same amino acids as are present in modern proteins. The amount of these residues declines sharply to the Oligocene, after which it proceeds more slowly. These older proteins contain relatively less aspartic acid and
-
11. Virus accumulation by the rock oyster Crassostrea glomerata.
The accumulation of virus by the New Zealand rock oyster Crassostrea glomerata has been studied in a static seawater system using radioactively labeled reovirus type III and Semliki Forest virus. The uptake of virus was found to be less rapid than for the bacterium Escherichia coli and to be unaffected by the presence of the marine alga Dunaliella primolecta
-
12. Persistence of Vibrio vulnificus in tissues of Gulf Coast oysters, Crassostrea virginica, exposed to seawater disinfected with UV light.
Vibrio vulnificus is an estuarine bacterium which can cause opportunistic infections in humans consuming raw Gulf Coast oysters, Crassostrea virginica. Although V. vulnificus is known as a ubiquitous organism in the Gulf of Mexico, its ecological relationship with C. virginica has not been adequately defined. The objective of the present study was to test th