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.

The hydrochemical genesis of groundwater brines of the Eastern arm of the Makgadikgadi basin.

2021 ◽  
Author(s):  
Fiona Motswaiso ◽  
Jiajie Wang ◽  
Kengo Nakamura ◽  
Noriaki Watanabe ◽  
Takeshi Komai
Keyword(s):  
Trace Elements ◽  
Trace Element Analysis ◽  
Mixing Processes ◽  
Element Analysis ◽  
Saline Groundwater ◽  
Monitoring Wells ◽  
Trace Species ◽  
End Members ◽  
Seawater Concentration ◽  
The Relationship

&lt;p&gt;Hydrochemistry of groundwater brines of the eastern part of the large playa deposit in the Makgadikgadi basin in northern Botswana has been analyzed. Brine samples were collected from 37 production and monitoring wells in this area. Brine samples for analysis were filtered to 0.45 and analyzed for major and minor anions and cations as well as trace species. The results of the hydrochemical analysis revealed that the major element chemistry of these samples from the area is dominated by Na and Cl with minor components of K, CO3, HCO3, and SO4, and depleted in Ca and Mg, which is typical of seawater or coastal water. The brine type is Na-Cl type. However, the exact mechanism of the genesis of the brines is still ambiguous, hence comparison curves of Na/C1 against seawater concentration factor (SCF) and Ca/Mg against (SCF) in order to ascertain the brine genesis geochemically were employed. The relationship between the current results to previous seawater freezing and evaporation experiments by other researchers indicated that the brines were formed by seawater evaporation. Observed variations in hydrogeochemistry and salinity with depth support the results of previous studies indicating downward infiltration of brackish waters and evaporative and/or mixing processes. With respect to minor and trace element analysis, A comparison of measured concentrations of trace elements to their concentration in seawater when normalized against the concentration of chloride, it can be seen that the saline groundwater brines in the area are enriched in a number of trace elements including W, Th, Se, Pb while depleted in Sr. Enrichments in all of these elements which would be expected to exhibit conservative behavior in the brines suggest that the origin of the brine is not restricted to the simple evaporation of seawater or but to a combination of end members enriched in these elements such as riverine and groundwater inputs.&lt;/p&gt;

scholarly journals Trace Element Analysis of Bovine Liver: Interlaboratory Survey in Australia and New Zealand

1980 ◽  
Vol 63 (4) ◽  
pp. 809-813 ◽  
Author(s):  
T S Koh ◽  
T H Benson ◽  
G J Judson
Keyword(s):  
Trace Elements ◽  
New Zealand ◽  
Trace Element ◽  
Trace Element Analysis ◽  
Bovine Liver ◽  
Moisture Determination ◽  
Element Analysis ◽  
Mean Values ◽  
Coefficients Of Variation

Abstract An interlaboratory survey of the determination of trace elements in bovine liver was undertaken. Thirty-three laboratories from Australia and 15 from New Zealand returned results. Moisture determination results were variable despite the use of a recommended drying procedure. For the 10 trace elements determined, the mean values (μg/g) with their interlaboratory coefficients of variation (CV) were: cadmium, 1.2 (42.5%); cobalt, 0.21 (9.5%); copper, 110 (6.0%); iron, 276 (11.0%); lead, 0.6 (48.9%); manganese, 8.6 (13.9%); mercury, 0.03 (30.0%); molybdenum, 2.5 (45.6%); selenium, 1.0 (17.5%); zinc, 219 (8.2%). The intralaboratory CV for determining each of these elements was less than 9% except for the lead CV which was 20.2%. Results for the determination of sodium, potassium, calcium, and magnesium were also reported. The survey shows that while the use of a standard reference material can improve the performance of laboratories in trace element analysis, it may also introduce analytical bias.

scholarly journals Parental magma composition of the Main Zone of the Bushveld Complex: Evidence from in-situ LA-ICP-MS trace element analysis of silicate minerals in the cumulate rocks

2020 ◽  
Author(s):  
Shenghong Yang ◽  
Wolfgang D. Maier ◽  
Belinda Godel ◽  
Sarah-Jane Barnes ◽  
Eero Hanski ◽  
...  
Keyword(s):  
Trace Elements ◽  
Trace Element ◽  
Bushveld Complex ◽  
Trace Element Analysis ◽  
Parental Magma ◽  
Main Zone ◽  
Element Analysis ◽  
Silicate Minerals ◽  
Incompatible Elements

&lt;p&gt;In-situ trace element analysis of cumulus minerals may provide a clue to the parental magma from which the minerals crystallized. However, this is hampered by effects of the trapped liquid shift (TLS). In the Main Zone (MZ) of the Bushveld Complex, the Ti content in plagioclase grains shows a clear increase from core to rim, whereas most other elements (e.g., rare earth elements (REEs), Zr, Hf, Pb) do not. This is different from the prominent intra-grain variation of all trace elements in silicate minerals in mafic dikes and smaller intrusion, which have a faster cooling rate. We suggest that crystal fractionation of trapped liquid occurred in the MZ of Bushveld and the TLS may have modified the original composition of the cumulus minerals for most trace elements except Ti during slow cooling. Quantitative model calculations suggest that the influence of the TLS depends on the bulk partition coefficient of the element. The effect on highly incompatible elements is clearly more prominent &amp;#173;&amp;#173;than on moderately incompatible and compatible elements because of different concentration gradients between cores and rims of cumulate minerals. This is supported by the following observations in the MZ of Bushveld: 1) positive correlation between Cr, Ni and Mg# of clinopyroxene and orthopyroxene, 2) negative correlation between moderately incompatible elements (e.g., Mn and Sc in clinopyroxene and orthopyroxene, Sr, Ba, Eu in plagioclase), but 3) poor correlation between highly incompatible elements and Mg# of clinopyroxene and orthopyroxene or An# of plagioclase. Modeling suggests that the extent of the TLS for a trace element is also dependent on the initial fraction of the primary trapped liquid, with strong TLS occurring if the primary trapped liquid fraction is high. This is supported by the positive correlation between highly incompatible trace element abundances in cumulus minerals and whole-rock Zr contents.&lt;/p&gt;&lt;p&gt;We have calculated the composition of the parental magma of the MZ of the Bushveld Complex. The compatible and moderately incompatible element contents of the calculated parental liquid are generally similar to those of the B3 marginal rocks, but different from the B1 and B2 marginal rocks. For the highly incompatible elements, we suggest that the use of the sample with the lowest whole-rock Zr content and the least degree of TLS is the best approach to obtain the parental magma composition. Based on calculation, we propose that a B3 type liquid is the most likely parental magma to the MZ of the Bushveld Complex.&lt;/p&gt;

scholarly journals The Relationship of Psychological Hardiness with Work Holism

2013 ◽  
Vol 5 ◽  
pp. 1-9
Author(s):  
Mohamad Khaledian ◽  
Banafshe Hasanvand ◽  
Sohrab Hassan Pour
Keyword(s):  
High School ◽  
School Teacher ◽  
High School Teacher ◽  
Simple Random Sampling ◽  
Male And Female ◽  
Gender And Work ◽  
Psychological Hardiness ◽  
Relationship Of ◽  
The Relationship ◽  
Academic Year

Background and Aim: Present research intends to investigate relationship of psychological hardiness with work holism among high school teachers. Methods: The under study society includes all male and female high school teacher in Ghorveh city in the academic year 2012-2013. Using simple random sampling method, a sample size of 100 male and female teachers was selected. To collect data, Kobassa Psychological Hardiness Questionnaire and Aghabeigi Workaholics Questionnaire were employed. To analyze the data, descriptive statistics (frequency, percentage, mean and standard deviation) and inferential statistics (t-test and regression analysis) were used. Results: The findings indicated that there is negative and significant relationship between the variables psychological hardiness and work holism. In addition, there is association between gender and psychological hardiness and between gender and work holism, also the constituents of psychological hardiness (commitment, control and challenge) are able to predict work holism.

scholarly journals Relation between swine weight and morphometric measurements

2020 ◽  
Vol 9 (9) ◽  
pp. e891998013
Author(s):  
Mônica Calixto Ribeiro de Holanda ◽  
Marco Aurélio Carneiro de Holanda ◽  
Leandro Ricardo Rodrigues de Lucena
Keyword(s):  
Mathematical Model ◽  
Body Weight ◽  
Regression Models ◽  
Hip Circumference ◽  
Morphometric Measurements ◽  
Large White ◽  
Male And Female ◽  
Lactation Phase ◽  
Relationship Of ◽  
The Relationship

Objective was to define a mathematical model that better explain the relationship of the animals weight depending not only on the animals age but also on the animals morphometric measurements. 40 piglets, half Duroc-Large White blood, were used, 20 males and 20 females, from 3 to 35 days of age (lactation phase) initially weighing 1.518 ± 0.121 kg and from 36 to 66 days of age (calving phase) with a body weight of 7.010 ± 0.704 kg. The animals were weighed weekly on a digital balance. The relationship of animal weight, age and morphometric measurements of male and female piglets were performed using regression models: existing, linear and power. The models were evaluated according to nine criterialinear model was the most adequate to explain the weight of male pigs, while for female pigs was the power. The age of the pig, the shank and palette length, as well as the circumference of the shank jointly explain the weight of the male piglets. The weight of females is explained jointly by age, body length, thorax and hip circumference.

scholarly journals Preface

2006 ◽  
Vol 78 (1) ◽  
pp. viii
Author(s):  
Michael Bickel
Keyword(s):  
Trace Elements ◽  
Trace Element ◽  
Trace Element Analysis ◽  
The Body ◽  
Research Centre ◽  
Food Contaminants ◽  
Joint Research ◽  
Element Analysis ◽  
Fortified Food ◽  
Animal Metabolism

Trace elements may have different functions in human and animal metabolism: some are toxic (e.g., Hg), others are essential to maintain good health (e.g., Ca), or they can be essential but also toxic, depending on the concentration in the body or in parts thereof (e.g., Se).The importance of various aspects of trace elements in relation to food is steadily increasing in the perception of the consumer and the respective authorities: food contaminants, essential and toxic elements, bioavailability and speciation, nutritional value and fortified food, reliable measurement of contents, etc. In addition, through the many minor and major food-related incidents during recent years the consumer is becoming more concerned about the quality and safety of food. As a result, research and development efforts in this area have also been increased and/or been redirected.TEF-2 was organized in Brussels 7-8 October 2004 by the Institute of Reference Materials and Measurements of the Joint Research Centre of the European Commission, with the support of the Department of Food Analysis, Institute of Agricultural and Food Biotechnology of the University of Warzaw, Poland and the Centre National de la Recherche Scientifique, France. It was carried through under the auspices of IUPAC.The objectives laid down for the symposium were- presenting state-of-the-art analytical methods for the enforcement of legal limits of trace elements in food;- disseminating new ideas and findings within the scientific community;- providing a forum for the exchange of new knowledge and experience between R&D, authorities, and industry; and- bringing together experts in the field with newcomers.TEF-2 was attended by 93 participants from 60 different institutions in 23 countries. It consisted of 26 lectures and 56 posters, structured according to the following four main topics:- trace elements in the food chain (from the environment to shelf product) including the effects of processing and of legislation- trace element bioavailability-toxicological and nutritional aspects- fortified food and supplementation legislation, manufacturing and labeling, standards- advances in trace element analysis in food matricesIt was emphasized that the field of trace elements in food is a lively research area, which generates interest and involvement from researchers, authorities, and industry, of course triggered and nurtured by the equally high interest of the consumer. A selection of the invited contributions to TEF-2 is presented in the subsequent seven papers in this issue.The importance of scientific exchange in this field was, again, recognized during TEF-2. Therefore, the continuation of this series of conferences was discussed, and the venue for the subsequent TEF-3 was decided. It will be organized by R. Lobinski of CNRS in Pau, France, at the beginning of October 2008.Michael BickelConference Editor

SERUM IMMUNOGLOBULINS: I. LEVELS IN NORMAL CHILDREN AND IN UNCOMPLICATED CHILDHOOD ALLERGY

PEDIATRICS ◽  
1968 ◽  
Vol 41 (3) ◽  
pp. 600-611
Author(s):  
Rebecca H. Buckley ◽  
Susan C. Dees ◽  
W. Michael O'Fallon
Keyword(s):  
Statistical Analysis ◽  
Geometric Mean ◽  
Serum Concentrations ◽  
Normal Children ◽  
Mean Values ◽  
Serum Immunoglobulins ◽  
Normal Individuals ◽  
Contrast Analysis ◽  
Relationship Of ◽  
The Relationship

In 201 normal individuals from infancy to adulthood, serum concentrations of immunoglobulins G, A, and M are presented as geometric mean values (mg/l00 ml) and as percents of adult mean values for each of these proteins. A statistical analysis revealed a significant relationship between age and both IgG and IgA concentrations up to ages 6 and 7 years. No correlation was present between age and immunoglobulin concentrations beyond that time, suggesting that the adult concentrations of IgG and IgA are normally reached and maintained after ages 6 and 7 years. In contrast, analysis of the IgM data suggested that the adult value is reached by age 1 year. No truly significant differences were found in immunoglobulin concentrations which could be attributed to sex. Significantly higher concentrations of IgG were found in normal Negro than in normal Caucasian subjects after age 6 years, but no significant differences were found below this age for IgG or at any age for IgA and IgM. Similarly determined serum immunoglobulins in 85 allergic children, selected because they had no complicating illnesses, were compared with the normal group according to the age of the child. No significant differences were found in concentrations of either IgG or IgA. Some differences were found in IgM, but these were small and were primarily associated with the relationship of IgM to age in the allergic group.

Trace-Element Analysis in Clinical Chemistry

1971 ◽  
Vol 17 (6) ◽  
pp. 461-474 ◽  
Author(s):  
Henry A Schroeder ◽  
Alexis P Nason
Keyword(s):  
Trace Elements ◽  
Trace Element ◽  
Clinical Chemistry ◽  
Trace Element Analysis ◽  
Present Knowledge ◽  
Human Metabolism ◽  
Element Analysis ◽  
Toxic Trace Elements ◽  
Essential Trace Elements ◽  
Clinical Conditions

Abstract Present knowledge of human bodily contents and concentrations in blood, urine, and hair of 11 essential trace elements and 17-22 nonessential inert or toxic trace elements is reviewed and summarized. Analyses of trace elements are applicable as diagnostic aids and indices for therapy in a number of clinical conditions. Techniques are not difficult, and analyses will probably become more or less routine for many diseases in which primary or secondary abnormalities are manifest. Trace elements play fundamental roles in human metabolism.

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