The Relationship of Copper, Cobalt, and Other Trace Elements to Hemopoiesis

1955 ◽  
Vol 3 (1) ◽  
pp. 11-19 ◽  
Author(s):  
GEORGE E. CARTWRIGHT
Keyword(s):  
Trace Elements ◽  
Relationship Of ◽  
The Relationship

scholarly journals INFERTILE MEN

2016 ◽  
Vol 23 (03) ◽  
pp. 274-278
Author(s):  
Jahangir Sultan ◽  
Shafqat Husnain Khan ◽  
Fatima Rashid
Keyword(s):  
Trace Elements ◽  
Teaching Hospital ◽  
Seminal Plasma ◽  
Crucial Element ◽  
Pathology Department ◽  
Infertile Men ◽  
Zinc Cadmium ◽  
Cadmium And Lead ◽  
Relationship Of ◽  
The Relationship

Objectives: The objective of this study was to compare the level of traceelements Zinc, Cadmium and lead in seminal plasma and serum of infertile men to the fertileones. Period: June 2014 to August 2015. Setting: Pathology Department of Continental MedicalLahore, attached with Ch. Rehmat Ali Memorial Trust teaching Hospital Methods: A total of 400samples of workers working in different factories for a period of 5 or more years were collected.Out of theses 80 were azoospermic. The relationship of trace elements in serum and seminalplasma of infertile men was compared with the normospermic individual controls. Results: Theconcentration of trace elements Pb and Cd was higher in seminal plasma and serum of infertileindividuals while Zn level was lower. So it is suggested that high levels of Pb and Cd may affectthe fertility and Zn is a crucial element for sperms and fertility in men.

Studies on serum level of some trace elements in oculocutaneous albinism subjects in Owerri metropolis

2020 ◽  
pp. 61-64
Author(s):  
Nwadike Constance ◽  
Nosiri Chidi Ijeoma ◽  
Nsonwu Magnus ◽  
Akanazu Chidimma ◽  
Olly-Alawuba Nkeiruka ◽  
...  
Keyword(s):  
Trace Elements ◽  
Serum Level ◽  
Trace Element Analysis ◽  
Oculocutaneous Albinism ◽  
Element Analysis ◽  
Male And Female ◽  
Mean Values ◽  
Copper And Zinc ◽  
Relationship Of ◽  
The Relationship

Studies on serum level of some trace elements in oculocutaneous albinism subject in Owerri metropolis was carried out using standard methods. Sixty (60) volunteer subjects made of 30 male and 30 female were used for the study. With the help of syringes, their sera were obtained from their blood samples and used for trace element analysis. Observed results revealed significant (p<0.05) decrease in levels of copper and zinc in male and female oculocutaneous albinism subjects against the control. The mean values for copper and zinc in both male and female also showed significant (p<0.05) reduction when compared to the control. The observed decreased in copper could influence tyrosinase and subsequently melanin production. There is need to investigate the relationship of the pigmentation disorder with other trace elements that were not considered in the present study. This study has revealed the serum level of some trace elements in oculocutaneous albinism subject in Owerri metropolis.

Genetic significance of trace elements in certain rocks of Singhbhum, India

1968 ◽  
Vol 36 (281) ◽  
pp. 661-670 ◽  
Author(s):  
Bibhuti Mukherjee
Keyword(s):  
Trace Elements ◽  
Common Source ◽  
Sulphide Ore ◽  
Genetic Significance ◽  
Thrust Zone ◽  
Singhbhum Granite ◽  
Trace Constituents ◽  
Relationship Of ◽  
Basic Rocks ◽  
The Relationship

SummaryThe distribution of trace elements is studied in different acid and basic rocks, adjacent to the copper lodes in the Mosaboni mines, Singhbhum, and adjoining the thrust zone, as well as of areas far away from the mineralized zones. Specific differences in composition and trace constituents in these rocks especially as regards S, Cu, Ni, and Co, suggest that the relationship of the Singhbhum granite with the soda granite is most unlikely, and that there is a connection between the soda granite and the sulphide ore-fluid ; a genetic relationship of sulphide mineralization with the epidiorite is doubtful. The possibility of the existence of a common source for the Chotanagpur granite and the Singhbhum granite is inferred.

The geochemistry of biotites from granites of northern Portugal with special reference to their tin content

1976 ◽  
Vol 40 (313) ◽  
pp. 453-466 ◽  
Author(s):  
A. M. R. Neiva
Keyword(s):  
Trace Elements ◽  
Special Reference ◽  
Igneous Rocks ◽  
Northern Portugal ◽  
Wide Range ◽  
Potential Mineralization ◽  
Element Fractionation ◽  
Tin Content ◽  
Relationship Of ◽  
The Relationship

SummaryBiotites from a number of granites have been analysed for major oxides and a wide range of trace elements. Their compositions are found to be typical of biotites from granite and to show element fractionation in presumed differentiation series. Estimates are made of the fugacity of oxygen and water during the crystallization of the granites. PH2O is found to increase slightly through the differentiation series, and fO2, for a temperature of 700°C is estimated to be between 10−18 and 10−12. Tin mineralization is connected with the igneous rocks and the relationship of tin in the micas to the rock compositions is described and the factors controlling the distribution of tin are discussed. The biotites have only up to 21 % of the tin of the granites. In general Sn increases in the biotites with decreasing temperature of equilibration and with increase in the degree of albitization of the granites. High Sn in biotites seems to be an indicator of potential mineralization.

The relationship of the scleractinian corals to the rugose corals

Paleobiology ◽  
1980 ◽  
Vol 6 (02) ◽  
pp. 146-160 ◽  
Author(s):  
William A. Oliver
Keyword(s):  
Critical Points ◽  
Scleractinian Corals ◽  
Convincing Evidence ◽  
Early Triassic ◽  
Rugose Corals ◽  
History Of ◽  
The Subject ◽  
Relationship Of ◽  
The Relationship ◽  
Biologic Factors

The Mesozoic-Cenozoic coral Order Scleractinia has been suggested to have originated or evolved (1) by direct descent from the Paleozoic Order Rugosa or (2) by the development of a skeleton in members of one of the anemone groups that probably have existed throughout Phanerozoic time. In spite of much work on the subject, advocates of the direct descent hypothesis have failed to find convincing evidence of this relationship. Critical points are:(1) Rugosan septal insertion is serial; Scleractinian insertion is cyclic; no intermediate stages have been demonstrated. Apparent intermediates are Scleractinia having bilateral cyclic insertion or teratological Rugosa.(2) There is convincing evidence that the skeletons of many Rugosa were calcitic and none are known to be or to have been aragonitic. In contrast, the skeletons of all living Scleractinia are aragonitic and there is evidence that fossil Scleractinia were aragonitic also. The mineralogic difference is almost certainly due to intrinsic biologic factors.(3) No early Triassic corals of either group are known. This fact is not compelling (by itself) but is important in connection with points 1 and 2, because, given direct descent, both changes took place during this only stage in the history of the two groups in which there are no known corals.

Skeletal elements of crinoid echinoderms: High-resolution structural and microanalytical results

1983 ◽  
Vol 41 ◽  
pp. 194-195
Author(s):  
D. F. Blake ◽  
L. F. Allard ◽  
D. R. Peacor
Keyword(s):  
High Resolution ◽  
Marine Invertebrates ◽  
Sea Urchins ◽  
Structural Features ◽  
Sea Stars ◽  
High Resolution Tem ◽  
Relationship Of ◽  
The Relationship ◽  
Insight Into

Echinodermata is a phylum of marine invertebrates which has been extant since Cambrian time (c.a. 500 m.y. before the present). Modern examples of echinoderms include sea urchins, sea stars, and sea lilies (crinoids). The endoskeletons of echinoderms are composed of plates or ossicles (Fig. 1) which are with few exceptions, porous, single crystals of high-magnesian calcite. Despite their single crystal nature, fracture surfaces do not exhibit the near-perfect {10.4} cleavage characteristic of inorganic calcite. This paradoxical mix of biogenic and inorganic features has prompted much recent work on echinoderm skeletal crystallography. Furthermore, fossil echinoderm hard parts comprise a volumetrically significant portion of some marine limestones sequences. The ultrastructural and microchemical characterization of modern skeletal material should lend insight into: 1). The nature of the biogenic processes involved, for example, the relationship of Mg heterogeneity to morphological and structural features in modern echinoderm material, and 2). The nature of the diagenetic changes undergone by their ancient, fossilized counterparts. In this study, high resolution TEM (HRTEM), high voltage TEM (HVTEM), and STEM microanalysis are used to characterize tha ultrastructural and microchemical composition of skeletal elements of the modern crinoid Neocrinus blakei.

Studies on Leukemogenic and Sarcomagenic Viruses

1970 ◽  
Vol 28 ◽  
pp. 156-157
Author(s):  
Leon Dmochowski
Keyword(s):  
Electron Microscopy ◽  
Electron Microscope ◽  
Morphological Properties ◽  
Mode Of Development ◽  
Relationship Of ◽  
The Relationship

Electron microscopy has proved to be an invaluable discipline in studies on the relationship of viruses to the origin of leukemia, sarcoma, and other types of tumors in animals and man. The successful cell-free transmission of leukemia and sarcoma in mice, rats, hamsters, and cats, interpreted as due to a virus or viruses, was proved to be due to a virus on the basis of electron microscope studies. These studies demonstrated that all the types of neoplasia in animals of the species examined are produced by a virus of certain characteristic morphological properties similar, if not identical, in the mode of development in all types of neoplasia in animals, as shown in Fig. 1.

The relationship of IGE receptor topography to signaling activity in RBL-2H3 mast cells

1991 ◽  
Vol 49 ◽  
pp. 236-237
Author(s):  
J.R. Pfeiffer ◽  
J.C. Seagrave ◽  
C. Wofsy ◽  
J.M. Oliver
Keyword(s):  
Mast Cells ◽  
Protein A ◽  
Scattered Electron ◽  
Ige Receptor ◽  
Receptor Complexes ◽  
Ige Binding ◽  
Electron Imaging ◽  
Small Clusters ◽  
Relationship Of ◽  
The Relationship

In RBL-2H3 rat leukemic mast cells, crosslinking IgE-receptor complexes with anti-IgE antibody leads to degranulation. Receptor crosslinking also stimulates the redistribution of receptors on the cell surface, a process that can be observed by labeling the anti-IgE with 15 nm protein A-gold particles as described in Stump et al. (1989), followed by back-scattered electron imaging (BEI) in the scanning electron microscope. We report that anti-IgE binding stimulates the redistribution of IgE-receptor complexes at 37“C from a dispersed topography (singlets and doublets; S/D) to distributions dominated sequentially by short chains, small clusters and large aggregates of crosslinked receptors. These patterns can be observed (Figure 1), quantified (Figure 2) and analyzed statistically. Cells incubated with 1 μg/ml anti-IgE, a concentration that stimulates maximum net secretion, redistribute receptors as far as chains and small clusters during a 15 min incubation period. At 3 and 10 μg/ml anti-IgE, net secretion is reduced and the majority of receptors redistribute rapidly into clusters and large aggregates.

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