scholarly journals Effect of cultivar, flesh colour, location and year of cultivation on the glycoalkaloid content in potato tubers

2014 ◽  
Vol 60 (No. 11) ◽  
pp. 512-517 ◽  
Author(s):  
K. Hamouz ◽  
K. Pazderů ◽  
J. Lachman ◽  
M. Orsák ◽  
V. Pivec ◽  
...  
Keyword(s):  
Human Health ◽  
Decisive Role ◽  
Field Trials ◽  
Potato Field ◽  
Potato Tubers ◽  
Flesh Colour ◽  
Fresh Matter ◽  
Total Glycoalkaloids ◽  
Different Altitudes

In the three-year field trials (2009–2011) at two locations with different altitudes a total of 14 potato cultivars with different colour of flesh (yellow, white, red and purple) were grown. The content of total glycoalkaloids (TGA) was determined by HPLC. TGA content ranged from 18.8 to 102.4 mg/kg fresh matter and none of the cultivars reached the value of risk to human health. Conclusive and decisive influence on the content of the TGA was recorded in genotype. Individual cultivars reached 0.47 to 1.45 of the TGA content in the control cv. Agria. In terms of the colour of the flesh the highest TGA content was found in group of red-fleshed cultivars (1.53 × higher than the average of cultivars with yellow or white flesh); while red-fleshed cv. Rote Emma reached the absolutely lowest TGA content of 14 cultivars, which confirms the decisive role of genotype. On warm, dry habitats in the lowlands a higher TGA content was observed when compared with the amount raised in a typical potato field.

scholarly journals Effect of genotype, flesh colour and environment on the glycoalkaloid content in potato tubers from integrated agriculture

2018 ◽  
Vol 64 (No. 4) ◽  
pp. 186-191 ◽  
Author(s):  
Urban Jaroslav ◽  
Hamouz Karel ◽  
Lachman Jaromír ◽  
Pulkrábek Josef ◽  
Pazderů Kateřina
Keyword(s):  
Weather Conditions ◽  
Russet Burbank ◽  
Potato Cultivars ◽  
Potato Tubers ◽  
Flesh Colour ◽  
Fresh Matter ◽  
Glycoalkaloid Content ◽  
Integrated Agriculture ◽  
Total Glycoalkaloids ◽  
Safety Limit

The main aim of the study was evaluation of the content of -solanine, -chaconine and total glycoalkaloids (TGA) in fourteen new potato cultivars with purple and red flesh in comparison with yellow- and white-fleshed control potatoes cultivated in a friendly way in integrated agriculture. The results were obtained from three-year trials on two locations. TGA levels in tubers’ flesh ranged from 33.69 to 167.77 mg/kg fresh matter (FM), and the ratio of α-chaconin to α-solanin from 1.18 to 3.78. No TGA safety limit was exceeded for any cultivar. The glycoalkaloids content was not significantly influenced by flesh colour, whereas the cultivar genotype had a decisive influence on their content. Eight cultivars with coloured flesh yielded a more favourable lower TGA content in comparison with the yellow-fleshed control cv. Agria (86.3 mg/kg FM); on the contrary six cultivars showed higher TGA values. The highest average TGA content was found in the purple-fleshed Bora Valley cultivar (165 mg/kg FM), the lowest was found in the red-fleshed Red Emmalie cultivar (43.6 mg/kg FM), whereas the white-fleshed cv. Russet Burbank reached 67.0 mg/kg FM. The glycoalkaloid content was significantly affected by location and year weather conditions.

scholarly journals Effect of cultivar, location and method of cultivation on the content of chlorogenic acid in potatoes with different flesh colour

2013 ◽  
Vol 59 (No. 10) ◽  
pp. 465-471 ◽  
Author(s):  
K. Hamouz ◽  
J. Lachman ◽  
K. Pazderů ◽  
K. Hejtmánková ◽  
J. Cimr ◽  
...  
Keyword(s):  
High Altitude ◽  
Chlorogenic Acid ◽  
Conventional Treatment ◽  
Field Trials ◽  
Climatic Conditions ◽  
Flesh Colour ◽  
Fresh Matter ◽  
Organic Cultivation ◽  
Organically Grown

In precise field trials in the years 2010 and 2011 the effect of genotype and location in cultivars with yellow, white, purple or red flesh on the content of chlorogenic acid (CA) and in 2011 and 2012 the effect of organic cultivation were evaluated. The results show a statistically significant effect of genotype to CA content, which ranged from 74.0 mg/kg fresh matter (FM) (Agria) to 825 mg/kg FM (Vitelotte). Demonstrable effect of flesh colour on CA content between cultivars with coloured flesh was found (430 mg/kg FM) in comparison with cultivars with yellow or white flesh (71.1 mg/kg FM). For cultivars with coloured flesh rather the genotype specific cultivar ruled than the purple or red flesh colour. In terms of the influence of location, higher CA levels were found on warm locations with frequent periods of drought in comparison with locations of high altitude climatic conditions which are favourable for potato cultivation. In the organically grown potatoes significantly higher levels of CA were found as compared with conventional treatment.

scholarly journals Ascorbic acid content in potato tubers with coloured flesh as affected by genotype, environment and storage

2018 ◽  
Vol 64 (No. 12) ◽  
pp. 605-611
Author(s):  
Karel Hamouz ◽  
David Bečka ◽  
Ivana Capouchová
Keyword(s):  
Ascorbic Acid ◽  
Ascorbic Acid Content ◽  
The Other ◽  
Potato Tubers ◽  
Flesh Colour ◽  
Fresh Matter ◽  
Tuber Flesh ◽  
Yellow Flesh ◽  
And Storage ◽  
Genotype A

The aim of the study was to evaluate the effect of genotype, tuber flesh colour, site conditions, year of cultivation and storage on the content of ascorbic acid (AAC) in the tubers of twelve potato cultivars with coloured flesh, compared with the yellow-flesh cv. Agria. AAC ranged from 88.6 to 282.0 mg/kg fresh matter (FM) and it was significantly influenced by genotype. A significantly highest AAC, on a three-year average, was achieved by cv. Rosemarie with red flesh (218.9 mg/kg FM; 1.10–1.84-fold more than the other cultivars). Position number two was achieved by the control cv. Agria (199.4 mg/kg FM). The purple or red colour of the cultivars with coloured flesh did not have a significant effect on the AAC. A significantly higher (1.17 times) AAC was determined at the Uhříněves site with warmer climate and drier weather before the harvest, compared with the other site in Valečov. The AAC was also significantly affected by year of cultivation. Cold storage (4°C, 180 days) resulted in a significant decrease in AAC, which varied in dependence on the genotype of the cultivars (34.6% to 65.1%). However, no link to the colour of the tuber flesh was found.

scholarly journals Differences in anthocyanin content and antioxidant activity of potato tubers with different flesh colour

2011 ◽  
Vol 57 (No. 10) ◽  
pp. 478-485 ◽  
Author(s):  
K. Hamouz ◽  
J. Lachman ◽  
K. Pazderů ◽  
J. Tomášek ◽  
K. Hejtmánková ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Ascorbic Acid ◽  
Field Trials ◽  
Anthocyanin Content ◽  
Potato Tubers ◽  
Flesh Colour ◽  
Total Anthocyanin ◽  
The Czech Republic ◽  
Total Anthocyanin Content ◽  
Lowland Area

The aim of this study was to determine that the total anthocyanin content (TAC) and antioxidant activity (AOA) in potato flesh with different colours grown in the Czech Republic. Four yellow- or white-, six purple- and four red-fleshed varieties were grown in 2009 at two different sites (Valečov – highland, seed potato area at 460 m a.s.l., Přerov nad Labem – lowland, new potatoes area at 178 m a.s.l.) in precise field trials. For purple- and red-fleshed varieties, average TAC values ranged from 61.5 to 573.5 cyanidin mg/kg of FM and significant effect of the variety of the TAC was found. High content reached the Violette and Vitelotte varieties with dark purple flesh, and the lowest content the Blue Congo variety with light purple marbled flesh. Significantly higher TAC was found in a lowland area Přerov nad Labem, which is probably related to drought stress. The lowest AOA was achieved by a group of varieties with yellow or white flesh – averaging 82.8 mg ascorbic acid equivalent/kg FM, in a group of red-fleshed varieties it was higher 4.34 times and in a group of purple-fleshed varieties even 5.03 times higher. Also between purple-and red-fleshed varieties significant differences in AOA were found, both high and low values of AOA showed the same varieties as in the case of the TAC. Among experimental sites higher AOA was also demonstrated at Přerov nad Labem. Correlation analysis showed a strong correlation between AOA and TAC (r = 0.8099).

The decisive role of the crystalline crust faults in the Black Sea opening.

2017 ◽  
Vol 39 (1) ◽  
pp. 3-16
Author(s):  
О. M. Rusakov ◽  
І. K. Pashkevich
Keyword(s):  
Black Sea ◽  
Decisive Role ◽  
The Black Sea ◽  
Crystalline Crust

The main directions of educational policy of Finland

2020 ◽  
Vol 11 (2) ◽  
pp. 6-13
Author(s):  
K. E. Stupak ◽  
Keyword(s):  
Higher Education ◽  
Education Policy ◽  
Education System ◽  
Decisive Role ◽  
The State ◽  
Vocational Education And Training ◽  
State Education Policy ◽  
Role Of The State ◽  
State Education

The article deals with analyzing the main streams of the education policy in Finland, which reflect the relationship between a person and society in modern socio–economic conditions. Such policy directs the system of education to change the person and his mind himself. Finland using its education system, has long before been concerned about preparing people for the future by reforming approaches to teaching in schools and higher education institutions. As a result, it has achieved world–wide recognition and top positions in various ratings have resulted. Therefore, today there is a great interest of scientists in certain issues of education functioning in Finland. Thus, G. Androshchuk, V. Butova. I. Zhernokleeva, T. Pushkareva and others study in their works the purpose and decisive role of Finland's education policy in the development of the education system. S. Grinyuk and V. Zagvozdkin pay attention to the practical the steps of reforming the Finnish system of education. T. Drobyshevsk investigates the system of providing educational services in Finland as a sector of knowledge production. L. Volynets, P. Kukharchuk consider the principles of the state education policy of Finland. L. Smolskaya examines the role of the state policy in implementing the "Finnish phenomenon"; P. Basyliuk and Yu. Kulykova, focus attention on the study of the evolution of the system of higher education in Finland; O. Scherbak reveals peculiarities of vocational education and training.

Role of Nutraceuticals in Health Promotion and Disease Prevention: A Review in the Indian Context

2020 ◽  
Vol 19 (2) ◽  
pp. 139-145
Author(s):  
Sheena Chhabra ◽  
Apurva Bakshi ◽  
Ravineet Kaur
Keyword(s):  
Health Promotion ◽  
Disease Prevention ◽  
Human Health ◽  
Health Issues ◽  
Scholarly Literature ◽  
Indian Context ◽  
The Impact ◽  
Immense Potential ◽  
Specific Health

Nutraceuticals have been around for quite some time. As the nomenclature suggests, they are placed somewhere between food (nutra-) and medicine (-ceuticals) in terms of their impact on human health. Researches have focused on the impact of various types of nutraceuticals on health, their efficacy in health promotion and disease prevention, and often on suitable uses of certain categories of nutraceuticals for specific health issues. However, we are still far from utilizing the immense potential of nutraceuticals for benefiting human health in a substantial manner. We review the available scholarly literature regarding the role of nutraceuticals in health promotion, their efficacy in disease prevention and the perception of nutraceuticals' health benefits by consumers. Thereafter we analyze the need for regulation of nutraceuticals and various provisions regarding the same.

Democratization in Serbia: An Analysis of Rational Choice and Structuralist Explanations

2015 ◽  
Author(s):  
Dunja Apostolov-Dimitrijevic
Keyword(s):  
Rational Choice ◽  
Path Dependence ◽  
Theoretical Perspective ◽  
Political Leadership ◽  
Decisive Role ◽  
The Other ◽  
Internal Factors ◽  
Transitional Societies ◽  
The Face

This paper explains political democratization in Post-Milosevic Serbia, utilizing two different accounts of the democratization process: one rooted in the rational choice framework and the other in structuralism. While rational choice explains the decisive role of political leadership in overcoming path dependence, the structuralist explanations show the transnational linkages that encourage democratization in the face of domestic setbacks. This particular debate between the two types of explanations represents the larger debate concerning the role of internal factors and external linkages in propelling democratization in transitional societies. The paper concludes by integrating the two sets of explanations offered by each theoretical perspective, in order to develop a coherent understanding of Serbia's democratization.   Full text available at: https://doi.org/10.22215/rera.v9i1.240

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