scholarly journals Iodine content in consumer hen eggs

2012 ◽  
Vol 51 (No. 3) ◽  
pp. 93-100 ◽  
Author(s):  
J. Travnicek ◽  
V. Kroupova ◽  
I. Herzig ◽  
J. Kursa
Keyword(s):  
Czech Republic ◽  
Correlation Coefficient ◽  
Daily Intake ◽  
Iodine Content ◽  
Egg Yolk ◽  
Human Nutrition ◽  
Total Iodine ◽  
Fresh Matter ◽  
The Czech Republic

This paper presents the latest information about the supply of iodine to meet its requirements in hens of laying type, on the basis of iodine content in egg yolk and about the importance of eggs as an iodine source in human nutrition. The Sandell-Kolthoff method was applied to determine iodine content in the yolk of eggs from 9 large flocks (54 eggs) and 16 small flocks (96 eggs) in 2004, and from 10 large flocks (135 eggs) and 15 small flocks (114 eggs) in 2005. Iodine content was also determined in the albumen of 70 eggs. In 2004, the iodine content in the yolk of eggs from large flocks was 1 014.1 ± 356.6 while in 2005 it amounted to 1 663.8 ± 1 179.7 µg/kg fresh matter (P < 0.01); the respective values for the yolk of eggs from small flocks in 2004 and 2005 were 307.1 ± 255.7 and 519.5 ± 508.2 µg/kg fresh matter (P < 0.01). Compared to 1996, in 2005, the iodine content in yolk increased by 123.7% in large flocks, and by 19.2% in small flocks. The iodine content in albumen was 16.2 ± 9.7 µg/kg fresh matter, and it accounted for 2.6–5.0% of the total iodine content in 1 egg. The correlation coefficient between iodine contents in yolk and albumen was r = 0.67. In the Czech Republic, 1 egg from large flocks contains on average 31.2 µg iodine while 1 egg from small flocks contains 10.0 µg. Eggs from large flocks cover 7–14% and from small flocks 2.2–4.4% of the daily iodine requirement in adults. Iodine concentrations exceeding 2 500 µg/kg yolk fresh matter in large flocks were measured between week 32 and 60 of the laying cycle and with daily intake of 0.116–0.132 mg iodine per hen.

Iodine content in running surface waters in areas with more intensive landscape management in the Czech Republic

2016 ◽  
Author(s):  
Roman Konečný ◽  
Jan Trávníček ◽  
Roman Konečný ◽  
Martin Šeda ◽  
Jaroslav Švehla ◽  
...  
Keyword(s):  
Czech Republic ◽  
Surface Waters ◽  
Landscape Management ◽  
Iodine Content ◽  
The Czech Republic

scholarly journals Iodine and Selenium Contents in Skeletal Muscles of Red Deer (Cervus elaphus), Roe Deer (Capreolus capreolus) and Wild Boar (Sus scrofa) in the Czech Republic

2010 ◽  
Vol 79 (3) ◽  
pp. 403-407 ◽  
Author(s):  
Jaroslav Kursa ◽  
Ivan Herzig ◽  
Jan Trávníček ◽  
Josef Illek ◽  
Vlasta Kroupová ◽  
...  
Keyword(s):  
Czech Republic ◽  
Wild Boar ◽  
Skeletal Muscles ◽  
Red Deer ◽  
Roe Deer ◽  
Iodine Content ◽  
Selenium Content ◽  
The Czech Republic ◽  
Wet Weight ◽  
Game Animals

The objective of this study was to examine iodine and selenium contents in skeletal muscles of selected species of game animals living in regions with low iodine and selenium contents in the soil and water. Iodine content was determined in 66 samples of skeletal muscles of red deer cut out of the musculus gracilis, 32 samples and 27 samples from the same muscle of roe deer and wild boar, respectively. The shot game animals came from hunting grounds in western and southern regions of the Czech Republic and in Protected Landscape Area Šumava. In red deer muscles the average iodine content was 44.9 ± 15.2 μg I·kg-1 wet weight with the range of 6.9 to 82.0 μg I·kg-1. The lower concentration in roe deer meat with the average 39.3 ± 14.1 μg I·kg-1 and the range from 18.3 to 84.4 μg I·kg-1 may be due to differences between biotopes and food. The average iodine concentration in the musculus gracilis of wild boars was 55.9± 27.0 μg·kg-1 wet weight. Selenium content was determined in 22 samples of red deer, 51 samples of roe deer and 27 samples of wild boar skeletal muscles. The average values of selenium content in the meat of red deer, roe deer and wild boars were 16.2 ± 8.4, 36.9 ± 16.6 and 27.6 ± 19.8 μg Se·kg-1 wet weight, respectively. All three species of game animals are characterised by low content and high variability of selenium concentration in meat with the minimum value 3.9 µg and maximum value 83.3 μg·kg-1 wet weight. The study brings new data on iodine and selenium content in the muscle of game animals in the Czech Republic.

scholarly journals Iodine content development in raw cow’s milk in three regions of the Czech Republic between the years 2008 and 2018

2019 ◽  
Vol 88 (3) ◽  
pp. 265-270
Author(s):  
Roman Konečný ◽  
Zuzana Křížová ◽  
Jan Hladký ◽  
Jitka Kautská ◽  
Lucie Hasoňová ◽  
...  
Keyword(s):  
Czech Republic ◽  
Iodine Content ◽  
Iodine Concentration ◽  
Cow’S Milk ◽  
Human Consumption ◽  
The Czech Republic ◽  
Cow's Milk ◽  
Current State ◽  
Content Development ◽  
Raw Cow’S Milk

The study examines an analysis and evaluation of iodine content in raw cow’s milk in three regions of the Czech Republic between the years 2008 and 2018. Bulk milk samples were collected at dairy farms situated in South Bohemia, Central Bohemia, and the Vysočina Region. Iodine in milk was determined on the basis of alkaline ashing, using the spectrophotometric method according to Sandell-Kolthoff. The highest mean iodine content was measured in 2009 (485.5 ± 408.2 μg/l) and the lowest in 2016 (169.2 ± 71.7 μg/l). Since 2010 there has been a gradual decline of iodine concentration, from 479.5 ± 304.9 μg/l in 2010 to 231.2 ± 63.5 μg/l in 2018. A similar decreasing tendency was recorded in all the monitored regions. The percentage of samples containing iodine above 500 μg/l was on the decrease (37% in 2009; 0% in 2016–2018) and less than 80 μg/l (8% in 2009; 0% in 2017–2018). The current state corresponds to the requirements for iodine content in milk for human consumption. The study emphasizes the importance of continuous iodine content checks in milk and the related adjustments of iodine supplementation to the feeding rations of dairy cows.

The iodine content in areas with enhanced landscape management in the Czech Republic

2020 ◽  
Author(s):  
Roman Konečný ◽  
Jan Trávníček ◽  
Roman Konečný ◽  
Martin Šeda ◽  
Jaroslav Švehla ◽  
...  
Keyword(s):  
Czech Republic ◽  
Landscape Management ◽  
Iodine Content ◽  
The Czech Republic

scholarly journals Rye – the nutritional and technological evaluation in Czech cereal technology – A review: Grain and flours

2021 ◽  
Vol 39 (No. 1) ◽  
pp. 3-8
Author(s):  
Marcela Sluková ◽  
Lucie Jurkaninová ◽  
Ivan Švec ◽  
Pavel Skřivan
Keyword(s):  
Czech Republic ◽  
Human Nutrition ◽  
Fibre Content ◽  
Bread Making ◽  
The Czech Republic ◽  
Rye Flour ◽  
High Fibre ◽  
High Fibre Content ◽  
Technological Evaluation

Rye is a later cereal compared to wheat and barley. The main use of rye in human nutrition consists in the processing of grain to flour (dark and wholemeal) and in the baking industries in sourdough and bread making. During the last fifty years, there has been a decline in the consumption of rye in the Czech Republic. Rye is a nutritionally interesting cereal due to its high fibre content. The part of the review presents the development of consumption of rye and rye products, nutritional significance of rye products, changes in the properties and content of rye grain components during processing with a focus on the evaluation of the effect of milling on components and microstructure of rye flour.

Occurrence of deoxynivalenol in Czech grain

2008 ◽  
Vol 1 (3) ◽  
pp. 299-305 ◽  
Author(s):  
I. Polišenská ◽  
S. Sýkorová ◽  
E. Matějová ◽  
J. Chrpová ◽  
L. Nedomová
Keyword(s):  
Czech Republic ◽  
Human Nutrition ◽  
Human Consumption ◽  
Immunochemical Method ◽  
The Czech Republic ◽  
Preceding Crop ◽  
Random Samples ◽  
Commission Regulation ◽  
Maximum Limit

A survey of deoxynivalenol (DON) content in cereals intended for human consumption was carried out in the Czech Republic (CR) over a seven-year period (2000-2006). Wheat, barley and rye samples of harvested cereals were collected directly from farmers where the selection was based on sample origin. In wheat, randomly sampled spikes and risk samples selected on the basis of visually scabby kernels (VSK) were also analysed. An immunochemical method, ELISA, was used for analysis. The maximum limit, according to Commission Regulation (EC) No. 1881/2006, for DON content (1,250 µg/kg) in unprocessed cereals for human nutrition was exceeded in random samples of wheat in 3.5% out of 345 analysed samples, of barley in 1.6% out of 498 analysed samples, and there were no samples of rye (out of 113) exceeding this limit. The analysis of spike samples and the samples that were selected based on VSK occurrence revealed much higher levels of DON content. Highly significant effects of the year, sample origin, and preceding crop on the DON content were found.

scholarly journals Trace element content in market eggs in Bohemia

2012 ◽  
Vol 60 (6) ◽  
pp. 75-80 ◽  
Author(s):  
Hana Dušová ◽  
Jan Trávníček ◽  
Zdeněk Peksa ◽  
Daniel Falta ◽  
Václav Pálka
Keyword(s):  
Czech Republic ◽  
Spectrophotometric Method ◽  
Trace Element Content ◽  
Iodine Content ◽  
Egg Yolk ◽  
The Other ◽  
Average Content ◽  
Egg Yolks ◽  
Copper Zinc

The aim of this study was to analytically determine the content of iodine, copper, zinc and manganese in the yolk of consumer eggs in Bohemia in 2007 and 2008. Investigated eggs originated from six so called intensive farms with large flocks (118 eggs) and twelve backyard farms or small-flock establishments (136 eggs) from three administrative regions in Czech Republic. Eggs from intensive farms were obtained directly from the establishments, while eggs from backyard farms were purchased from private farmers. Spectrophotometric Sandell-Kolthoff method was used for determination of iodine content in egg yolk, while Cu, Zn and Mn levels were determined by the flame absorption spectrophotometric method (AAS). The average content in fresh egg yolk from intensive farms was determined to 0.9 ± 0.2 for iodine, 8.4 ± 2.1 of copper, 29.8 ± 6.9 of zinc and 1.2 ± 0.3 of manganese, all in mg·kg−1, as compared to yolk content from backyard farms with 0.4 ± 0.04 mg·kg−1 of iodine, 10.8 ± 2.9 of copper, 32.5 ± 6.9 of zinc and 1.5 ± 0.3 of manganese. Average content of copper, zinc and manganese was lower in egg yolks from intensive farms (P < 0.01) as compared to the egg yolks from backyard farms, while iodine content on the other hand was lower in eggs from backyard farms (P < 0.01).

scholarly journals The content of iodine in pork 

2012 ◽  
Vol 50 (No. 12) ◽  
pp. 521-525 ◽  
Author(s):  
I. Herzig ◽  
J. Travnicek ◽  
J. Kursa ◽  
V. Kroupova
Keyword(s):  
Iodine Content ◽  
Potential Effect ◽  
Iodine Intake ◽  
Fresh Matter ◽  
The Czech Republic ◽  
Leg Muscles ◽  
Iodine Level ◽  
Annual Consumption ◽  
The Relationship

The present study brings current information on providing market pigs and sows with the required iodine level up to date. The results were obtained by the determination of the iodine content in leg muscles and by the relationship between those concentrations and the iodine intake by the human population. The iodine content was assessed by the Sandell-Kolthoff method in 108 samples of leg muscles (m. gracilis) of market pigs from 18 herds in 10 districts of the Czech Republic collected during the period April 2004 to August 2004. Average iodine content in leg muscles of market pigs was 25.6 &plusmn; 15.54 &mu;g I/kg fresh matter, median 20.2 and coefficient of variation 60.6%. Significantly higher (P &lt; 0.05 to P &lt; 0.001) iodine levels were recorded in the leg muscles was of herds LI2, ZU, BR, FU, BU, ST and some others. Iodine level variations in the samples from respective farms were expressed in the levels range of 8.5 to 66.2 &mu;g I/kg. The detected variations might have been caused by different iodine saturation of the pigs from different herds, their physiological requirement, manifestation of physiological ability of respective animals to utilize the iodine source, potential effect of goitrogens and environmental conditions. It is necessary to consider the iodine content in pork in the balance of the iodine supply in the shopping basket of consumers. Provided that the average annual consumption of pork is 40.9 kg with iodine content of 25.6&nbsp;&mu;g/kg(8.5 to 66.2 &mu;g/kg), the average annual iodine intake is 1047 &mu;g, which represents 1.4 to 2.4% of the required intake per person per year.

scholarly journals Faktory ovlivňující výkonnost podniku – analýza empirických dat

2021 ◽  
Vol 10 (4) ◽  
pp. 34-40
Author(s):  
Marta Nosková
Keyword(s):  
Czech Republic ◽  
Performance Assessment ◽  
Correlation Coefficient ◽  
Performance Indicators ◽  
Business Performance ◽  
Future Research ◽  
The Czech Republic ◽  
Total Debt ◽  
The Right ◽  
The Relationship

The question of business performance assessment has been discussed by many researchers. Some resulting indicators of business performance can be applied in all enterprises (e.g. ROE, ROA), some have limited use (e.g. Tobin ́s Q). This paper focuses on finding the aspects (indicators), that could affect business performance itself, rather than to propose new indicators of business performance. The results of this analysis could help the management of enterprise to focus on the right objectives in the future. The research adopted quantitative approach. It is based on analysis of fourteen indicators (i.e. their values) processed in order to prove or disprove their statistical interrelationship with chosen performance indicators (ROE, ROS). The dataset, describing 784 large enterprises in the Czech Republic, was downloaded from Albertina – Gold edition. Data were statistically tested using Spearman ́s correlation coefficient. Findings of this research indicate that in the case of few indicators (such as Equity or Total debt in the case of ROS) the relationship can be proven. These indicators are presented, and results are discussed in the paper, together with the possible future research.

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