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Olga Długosz-Grochowska,Renata Wojciechowska,Michał Kruczek,Anna Habela 한국원예학회 2017 Horticulture, Environment, and Biotechnology Vol.58 No.5
In recent years, light-emitting diodes (LEDs) have been introduced as a new source of supplementallighting in winter greenhouse crop production to improve yield and quality. The aim of this study was to determinethe effect of light supplementation with LEDs on the yield and the concentration of several health-promotingcompounds in two cultivars of lamb’s lettuce (Valerianella locusta, L.), ‘Noordhollandse’ and ‘Holländisher’ in agreenhouse cultivation in winter. Four different LED spectra used to extend the photoperiod (16 h day/8 h night)were tested: 10R:0B (100% red), 9R:1B (90% red, 10% blue), 8R:2B (80% red, 20% blue), and 7R:3B (70% red,30% blue). The control plants were illuminated by high-pressure sodium (HPS) lamps. The photosynthetic photonflux density at the plant canopy level was approximately 200 μmol·m-2·s-1in all treatments. The plants were harvestedon the 45thday of light treatment (60 days after sowing). In both cultivars, the 10R:0B LED light treatment resultedin the highest yield, but low concentrations of ascorbic acid, xantophylls, and phenolic compounds. Supplemental lightingwith HPS lamps resulted in high concentrations of nitrate and carotenoids, but low fresh mass, ascorbic acid, andtotal phenols content. The addition of blue light in the spectrum increased antioxidant properties; however, certain effectswere cultivar-dependent. High yields with the most satisfactory composition of soluble sugars, ascorbic acid, carotenoids,and polyphenols, as well as high antioxidant properties and reduced nitrate levels, in the leaves of the tested cultivarswere obtained with 8R:2B LED lighting. Thus, supplemental lighting with 80% red and 20% blue light may be advantageousin greenhouse-cultivated V. locusta ‘Noordhollandse’ and ‘Holländisher’ cultivars.
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Validity of self-reported height and weight in elderly Poles
Ewa Nied?wiedzka,Anna Długosz,Lidia W?dołowska 한국영양학회 2015 Nutrition Research and Practice Vol.9 No.3
BACKGROUND/OBJECTIVES: In nutritional epidemiology, collecting self-reported respondent height and weight is a simpler procedure of data collection than taking measurements. The aim of this study was to compare self-reported and measured height and weight and to evaluate the possibility of using self-reported estimates in the assessment of nutritional status of elderly Poles aged 65 + years. SUBJECTS/METHODS: The research was carried out in elderly Poles aged 65 + years. Respondents were chosen using a quota sampling. The total sample numbered 394 participants and the sub-sample involved 102 participants. Self-reported weight (non-corrected self-reported weight; non-cSrW) and height estimates (non-corrected self-reported height; non-cSrH) were collected. The measurements of weight (measured weight; mW) and height (measured height; mH) were taken. Using multiple regression equations, the corrected self-reported weight (cSrW) and height (cSrH) estimates were calculated. RESULTS: Non-cSrH was higher than mH in men on average by 2.4 cm and in women on average by 2.3 cm. In comparison to mW, non-cSrW was higher in men on average by 0.7 kg, while in women no significant difference was found (mean difference of 0.4 kg). In comparison to mBMI, non-cSrBMI was lower on average by 0.6 kg/m2 in men and 0.7 kg/m2 in women. No differences were observed in overweight and obesity incidence when determined by mBMI (68% and 19%, respectively), non-cSrBMI (62% and 14%, respectively), cSrBMI (70% and 22%, respectively) and pcSrBMI (67% and 18%, respectively). CONCLUSIONS: Since the results showed that the estimated self-reported heights, weights and BMI were accurate, the assessment of overweight and obesity incidence was accurate as well. The use of self-reported height and weight in the nutritional status assessment of elderly Poles on a population level is therefore recommended. On an individual level, the use of regression equations is recommended to correct self-reported height, particularly in women.
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