Joanna K. Banach

Possibilities of Using Electrical Parameters of Milk for Assessing its Adulteration with Water

This manuscript presents results of a research aimed at conducting a statistical analysis of correlation between the percentage addition of water to milk and its electrical parameters, which are used to determine the degree of milk dilution and the level of milk adulteration with water. The results of milk conductivity parameters analysed in the study showed admittance and conductance to decrease systematically with water addition from ca. 10.8 to 7.8 mS. In contrast, impedance and resistance values were observed to increase from ca. 91 to 128 Ω. Results of the measurements of capacitance parameters showed that with an increasing content of distilled water in milk the value of equivalent parallel capacitance was decreasing from 1.4 to 0.65 μF. In turn, along with water content increasing to 15%, the value of equivalent series capacitance was increased from 212 to 237 μF. Still, at water content of milk exceeding 15%, the value of that parameter remained unchanged. The statistical analysis demonstrated a close linear correlation (0.989 ≤ r ≤ 0.998) between the percentage of water added to the milk and electrical parameters of impedance, resistance, admittance, conductance, as well as equivalent parallel capacitance of milk.

Influence of Variety, Moisture Content, Kernel Size and Applied Current Frequency on the Electric Properties of Wheat Grain

The work aimed at determination of electric properties of wheat grain in dependence on its variety, moisture, geometrical features of kernels and applied current frequency. Wheat grain of 4 Polish winter varieties: Korweta, Juma, Mikon and Kobra from harvest 2001 were used as the material for study. Grain was sized into 3 fractions: (1) > 2,8mm, (2) 2,5–2,8mm, and (3) 2,2–2,5mm. Basic geometrical features were determined for not sorted grain (control sample) and its three fractions by the use of digital image analysis. Electric properties of grain (at 11% and 15% moisture content) have been performed with the Hewlett Packard 4263B meter. Measurements of impedance, resistance, admittance, conductance, as well as equivalent parallel capacitance and equivalent series capacitance were made. Obtained results were subjected to statistical analysis with the use of Statistica™ programme. Changes in electric properties of grain significantly depended on all of studied factors. Most of all significant correlations appeared between geometrical features and studied electric properties of grain of 15% moisture. Statistical analysis of the results proved significant linear correlations between electric properties of kernels and their length, perimeter and circularity coefficient RC2 at higher measurement frequencies.

Linear correlation between pH value of stimulated beef and electrical current intensity

ABSTRACT The aim of the present study was to determine mathematical relationships between pH changes in beef 24 h post-slaughter and changes in the intensity of electrical current flowing through bull and heifer carcasses during high-voltage electrical stimulation. The electrical stimulation was applied 40 min postmortem for 120 s. The pH values of m. longissimus thoracis et lumborum were analyzed in the function of electrical current intensity changes and its change during electrical stimulation. Mathematical linear correlations of the y = ax ± b type were demonstrated between pH values at 2, 6, and 24 h postmortem and the initial (Ii) and ultimate (Iu) electrical current intensity values, the difference between them and the initial pH values determined before electrical stimulation. High multiple correlation coefficients (R2 = 0.416, α ≤ 0.001) between Iu and pH values 24 h post-slaughter enabled concluding that there is a possibility to predict a pH value of stimulated carcass with high accuracy, and thus also beef quality, based merely on the ultimate electrical current intensity values.

Microbial quality of raw minced meat in Poland based on process hygiene criterion

Introduction: In the last years and decades more and more new plants came to the market as food or old crops have been rediscovered. Based on the presence of secondary plant metabolites specific effects are often attributed to these plants and/or derived preparations. Depending on the amount and the accompanying substances in extracts and preparations these substances can also be toxic. In many cases, plants and plant preparations are not adequately tested for their safety before marketing. In the European Union, authorization procedures and health assessments are only required for foods that are considered novel foods or produced from genetically modified organisms. A working group of federal and state governments, the BfR has worked with, has drawn up a list of nearly 600 plants and plant parts, which should facilitate the assessment of these plants (or plant parts) and derived preparations by food inspection bodies and food industry. Objectives: 18 plants or parts of plants were selected for an evaluation because of their known pharmacological or psychotropic effects or due to possible health risks. Method / Design: The risk assessments of these plants or parts of plants, including for example goji berries and yohimbe bark, were performed using the “Guidance on Safety assessment of botanicals and botanical preparations intended for use as ingredients in food supplements” of the European Food Safety Authority (EFSA). Results: Nine of the 18 plants or parts of plants pose a risk to consumers and should not be used in food. Five plants or parts of plants might pose risks when used in food. For four plants or plant parts, no risks were seen. Conclusions: The health assessments are intended to be a first step in the process of harmonization at European level. The opinions are published in a booklet and accessible on the web(04/08/2019) Organic food for sustainable and healthy diets lessons from the nordic diet? Introduction: The New Nordic Diet (NND) was developed in 2004 by chefs and food professionals from the five Nordic countries. The goal for the NND was that it should be based on traditional regional food products but healthier than the traditional eating habits. The NND builds on four key principles: Nordic identity, health, gastronomic potential and sustainability.Objectives: Can the NND be used as a model for a sustainable diet in other geographical regions?Methods/design: The NND can be described by a few overall guidelines: 1) more calories from plant foods and fewer from meat; 2) more foods from the wild countryside and 3) more foods from sea and lakes. In many ways, the New NND is very similar to a Mediterranean diet but relies on rapeseed (canola) oil instead of olive oil and ramson instead of garlic. The diets differ in their types of produce due to regional differences in climate, soil and water.Results: The health effects and sustainability of the NND has been tested in a number of scientific studies, including the OPUS project (Optimal Well-Being, Development and Health for Danish Children through a Healthy New Nordic Diet) supported by the Nordea foundation (http://foodoflife.ku.dk/opus/english/nyheder/publikationer/) in which the NND was compared to the Average Danish Diet (ADD). The use of mostly local products and reduction of the meat intake were of both socioeconomic and environmental advantage. Including organic produce increased environmental impact of the NND.Conclusion: In line with the Mediterranean diet the NND is a predominantly plant-based diet, and although the two have not been directly compared, it would be fairly safe to assume that they are equally healthy. Overall, the NND is just a regional interpretation of the tenets of healthy eating. Basically the principles of the NND could be incorporated into any regional diet.Who are we eating with? There are always companions to relate to in a meal, both to those who are present and they who are on another place or even in a past history. The choice of food and beverag ...Objectives : The aim of the present work was to compare the effect of ALA, EPA and DHA on the development of adipose tissue and its metabolism during a high fat-high sucrose (HFHS) challenge.Ann Nutr Metab 2015; 67(suppl 1) 435 BMD (BL: -2.4±0.7, PI: -0.9±0.44), serum calcium (BL: 9.5±0.6, PI: 10.5±0.52) and vitamin D (BL: 17.63±4.9, PI: 42.72±8.9) was observed. Locomotor problems were reduced among 44.06% subjects in group B compared to 11.11% in group A. Post interventional BMD (t: -2.16, P≤0.05), serum calcium (t: -4.05, P≤0.001) and vitamin D (t: -4.20, P≤0.001) of group B was significantly higher compared to group A.Affiliation: (1) PhD Student in Food Science. Human Nutrition Unit. Department of Food Science. University of Parma. Italy; (2) Associate Professor. Department of Food Science. University of Parma. Parma. Italy; (3) Full Professor. Department of Food Science, University of Parma. Parma. Italy; (4) Post-Doc Research Assistant. Department of Agricultural, Forest and Food Science, University of Turin. Torino. Italy; (5) Assistant Professor. Department of Soil, Plant and Food Science. University of Bari Aldo Moro. Bari. Italy; (6) Post-Doc Research Assistant. Department of Pharmacy and Biotechnology, Alma Mater Studiorum University of Bologna. Bologna. Italy; (7) Full Professor. Department of Soil, Plant and Food Science. University of Bari Aldo Moro. Bari. Italy; (8) Nutritionist. Department of Food Science. University of Parma. Parma Italy.Effect on attention of a vegetable smoothie, rich in berries, fruitsand vegetables, served at the school mid-morning brake. ViktoriaOhlsson. Kristianstad UniversityPurpose:The purpose of this pilot ...Introduction: Since appetite control works differently in fluid and solid intake we wanted to analyse the energy contribution from those two types of energy sources.Objectives: The objective of thi ...Introduction: Infrequent fruit and vegetable (FV) intake is especially common among children with low parental educational level (PEL) and among boys.Objectives: Our aim was to examine whether a school-based intervention was efficient in increasing children’s FV intake especially among those whose FV intake is the lowest and which factors could explain the the group differences in the associations.Method / Design: In Finland 11-year-old (at baseline) children participated in the PRO GREENS intervention in winter 2009. In control schools were 424 and in intervention schools 386 children (response rate 77%). Children filled in validated food frequency questionnaire assessing FV intake (times/day) and a validated questionnaire about factors influencing FV intake (availability of FV, liking for FV, preferences, self-efficacy to eat FV, attitudes towards FV and knowledge of the recommendations) both at baseline May 2009 and follow-up May 2010. Parental educational level (low, middle, high) was reported by the parents. Associations were examined with linear regression and mediation analyses.Results: The intervention increased fruit intake among girls but not among boys. Intervention increased also children’s knowledge of the recommendations. Since knowledge had no impact on boys’ fruit intake, the increase in knowledge mediated only intervention’s effect on girls’ fruit intake. Intervention increased children’s fruit intake similarly in all PEL groups.Intervention increased vegetable intake only in the middle PEL group but no intervention effect was noted among children with low or high PEL. Knowledge, the only factor which mediated the intervention’s effect on children’s vegetable intake, could not explain PEL differences in the effectivity of the intervention.Conclusions: Increase in knowledge was not a sufficient prerequisite to increase FV intake among boys or the lowest PEL group. More in depth analyses are needed to find out which factors to target in interventions to reach an effect in the target groups.