Field sampling for evaluation of mechanical behaviour in embankment dams is not easily performed, because the performance and the safety of the structure may be unfavourably affected. A non-destruc...

Solanine is a glycoalkaloid found in the Solanaceae family, such as the potato. It is very poisonous even in small quantities because it has pesticide and fungicide effects and represents a natural plant defense mechanism. Its concentration increases when the plant is exposed to the agents that can cause plant stress (fertilization, insecticide use, etc.). This paper aims to examine the influence of three cultivation systems (conventionally, organically and naturally) on the biosynthesis of α-solanine (αS) through his quantification in young potatoes using densitometry. Two varieties of potatoes were analyzed: Aladdin (Ala) and Mona Lisa (MoL). For statistical analysis, the Student's t-test was used. The results showed that the use of artificial insecticides caused a very intense biosynthesis of αS in the conventionally grown Ala variety (1.19 mg/100 g of fresh tubers (f.t.)) in comparison to the average α-solanine content (AαSC) by the organically grown Ala (0.62 mg/100 gf.t.) (it is close to the statistical significance, (p=0.08)). It is difficult to explain the very high AαSC of natural Ala cultivation (1.62 mg/100 gf.t.). Analysis of potatoes of the MoL variety showed that the AαSC of conventionally grown potatoes (1.35 mg/100 gf.t.) was statistically higher than the AαSC of naturally grown potatoes (0.59 mg/100 g of f.t.) (p<0.05). Also, AαSC of the organically grown MoL (1.40 mg/100 gf.t.) was higher than the AαSC of naturally grown MoL, but without statistical significance (p>0.05). Concentrations of αS founded in the case of conventionally, organically and naturally grown potatoes are considered safe and such potatoes are suitable for consumption. However, because of a slight reduction in toxic αS, it is recommended to consume organically grown potatoes (Ala variety), and naturally grown potatoes (MoL variety).

It is usually difficult to determine values for soil parameter values in earth- A nd rockfill dams by traditional methods. Field sampling is not easily performed, especially in the impervious parts ...

Assessment of Arching and Cracking Potential by Numerical Modelling : A Case Study of the Mornos Dam

Over the lifetime of a dam several measures are usually taken in order to assure the stability and the performance of the dam. In this case a hydropower dam in Northern Sweden is in need of dam saf ...

The aim of this study was to compare total phenols and sulfur content in ramsons and two garlic species, autumn- and spring-garlic. Harvesting time for ramsons was May and for garlics was June. Total phenol content was determined by the Singleton-Rossi method, which is based on phenol oxidation using Folin-Ciocalteu reagent and spectrophotometric quantification of reduced blue-colored products. For total sulfur analysis, all sulfur molecular species were oxidised to the stable sulfate form, which was quantified by ion chromatography (HPIC). The quantity of phenolic compounds (mg phenols/g fresh sample) was the highest for the leaves of autumn-garlic (1.97mg/g), followed by leaves of spring-garlic (1.49mg/g) and ramsons (1.28mg/g). A lower phenol content was found in the bulbs: spring-garlic bulb (0.80mg/g), autumn-garlic bulb (0.48mg/g) and ramson bulb (0.46mg/g). The highest sulfur level (mg sulfur/g fresh sample) was found in spring-garlic leaf (1.10mg/g) while the quantity of sulfur for other samples were: ramsons bulb (0.93mg/g), ramsons leaf (0.74mg/g), spring-garlic bulb (0.70mg/g), autumn-garlic leaf (0.66mg/g) and autumn-garlic bulb (0.63mg/g). Levels of sulfur compounds and total phenol content in the bulbs and leaves correlated with the age of the plant. Garlic leaves can be used as a significant source of organosulfur compounds for middle to late spring.