Joanna Klepacka

• PhD at University of Warmia and Mazury in Olsztyn

The fruit of berry plants is primarily used for industrial purposes, while the leaves are often regarded as waste. However, these leaves, rich in valuable bioactive compounds, have the potential to serve as raw materials for various industries, including cosmetics. This study compared the content of micro- and macronutrients in the leaves of wild s...

The fruit of berry plants is primarily used for industrial purposes, while the leaves are often regarded as waste. However, these leaves, rich in valuable bioactive compounds, have the potential to serve as raw materials for various industries, including cosmetics. This study compared the content of micro-and macronutrients in the leaves of wild st...

From Forest Berry Leaf Waste to Micellar Extracts with Cosmetic Applications. The fruit of berry plants is primarily used for industrial purposes, while the leaves are often regarded as waste. However, these leaves, rich in valuable bioactive compounds, have the potential to serve as raw materials for various industries, including cosmetics. This s...

Traditionally, kombucha is produced by the fermentation of black or green tea infusions with the use of SCOBY (Symbiotic Culture of Bacteria and Yeasts). However, SCOBY exhibits the ability to ferment other substrates as well, which can be used to create novel products with new sensory and health-promoting properties. This paper investigates the an...

Background and objectives: Buckwheat groat is a product that is eagerly consumed in many countries around the world, and its production consists primarily of the hydrothermal treatment (e.g., steaming, roasting, drying) and dehulling of buckwheat seeds. During this process, a large amount of buckwheat hull is obtained, which is treated primarily as...

Increasing the temperature of the drying medium reduced the moisture content and shortened the drying time. The temperature during the drying process modified the essential oil content of the tested raw materials. The most OE was obtained from the herb dried at 40ºC 1.95% least at 50ºC 1.05%. and in fresh mint herb 0.90%. The main components of the...

Simple Summary Goat’s milk has beneficial effects on health condition maintenance, physiological function, and nutrition of both children and elderly people, and according to some authors, can be consumed without inducing adverse symptoms by people suffering from cow milk allergy. The content of bioactive ingredients (fatty acids, vitamins, micro,...

The paper analyzes the effect of the place of cultivation and the method of tea leaf processing on its nutritional value measured by the level of strong antioxidant phenolic compounds and selected minerals (Cu, Mn, Fe, Zn). Infusions obtained from the leaves of 33 different types of tea belonging to 6 groups due to the processing process and grown...

Biopolymeric Chitosan-Carrageenan nanocomposites 66.6–231.82 nm in size containing the chemical fungicide mancozeb (nano CSCRG-M) were synthesized following a green chemistry approach. The physicochemical study of nanoparticles (NPs) was accomplished using a particle size analyzer, SEM and FTIR. TEM exhibited clover leaf-shaped nanoparticles (248.2...

Recently, plant-derived bioactive compounds have been utilized in the preparation of several functional food products; however, stability and water solubility are major constraints to these compounds. Therefore, to overcome this problem, the synthesis of nanoemulsion (oil in water) with varying concentrations of Woodfordia fruticosa flower extract...

One way of increasing folate status, especially in a state of increased demand (e.g., women of childbearing age), is dietary supplementation with folic acid (FA). The dietary supplements market in Poland shows a controversial situation and, for many reasons (the ease of placing them on the market, the lack of control of chemical composition), the p...

Pea (Pisum Sativum) is an important source of nutritional components and is rich in protein, starch, and fiber. Pea protein is considered a high-quality protein and a functional ingredient in the global industry due to its low allergenicity, high protein content, availability, affordability, and deriving from a sustainable crop. Moreover, pea prote...

A brain tumor (BT) is a condition in which there is growth or uncontrolled development of the brain cells, which usually goes unrecognized or is diagnosed at the later stages. Since the mechanism behind BT is not clear, and the various physiological conditions are difficult to diagnose, the success rate of BT is not very high. This is the central i...

Interest in the utilization of plant-based bioactive compounds in foods has increased due to their biochemical activities and as alternatives in the reduction of high concentrations of chemical utilization. However, some of these additives are hydrophobic, thus being harder to disperse into the hydrophilic food matrix. Therefore, an oil-in-water na...

Phenolic compounds are components with proven beneficial effects on the human body, primarily due to their antioxidant activity. In view of the high consumption of tea and the numerous factors that affect the nutritional value of its infusions, the aim of this study was to identify the effects of tea type and duration of leaf extraction with water...

Taro (Colocasia esculenta) is an important source of carbohydrates as an energy source and is used as a staple food throughout the world. That is rich in mucilage and starch granules makes it a highly digestible ingredient. Mucilage can act as a matrix, thickening, binding, emulsifying, and foaming agent in food, pharmaceutical, and several fields...

Biopolymeric Chitosan-Carrageenan nanocomposites 66.6–231.82 nm in size containing the chemical fungicide mancozeb (nano CSCRG-M) were synthesized following a green chemistry approach. The physicochemical study of nanoparticles (NPs) was accomplished using a particle size analyzer, SEM and FTIR. TEM exhibited clover leaf-shaped nanoparticles (248.2...

The polyphenolic compounds are having very high biological activity and functional properties due to that they have gained great importance. For functional foods, these polyphenols are used as fortification agents. So, the milk proteins have been representing as exclusive characteristics for polyphenol studies. To increase the bioavailability and b...

The accumulation of valuable nutrients in cereal grains depends on a number of factors, including species, cultivars, and environment conditions. The aim of this study was to compare protein, some polyphenols and rutin content, as well as mineral composition in Fagopyrum tataricum and Fagopyrum esculentum genotypes growing in Polish conditions. A f...

Due to the different levels of bioactive compounds in tea reported in the literature, the aim of this study was to determine whether commercially available leaf teas could be an important source of phenolics and selected minerals (copper, manganese, iron, zinc, magnesium, calcium, sodium, potassium) and if the differences in the content of these co...

This study aimed to compare folate contents in hen eggs from four different farming systems, namely organic, free range, barn, and cage one. Folate retention during egg boiling was studied as well. The contents of individual folate vitamers were determined using the high-performance liquid chromatography method (HPLC), following trienzyme treatment...

Acrylamide (AA) is a neurotoxic and carcinogenic substance that has recently been discovered in food. One of the factors affecting its formation is the heat treatment method. This review discusses the microwave heating as one of the methods of thermal food processing and the influence of microwave radiation on the acrylamide formation in food. In a...

This study analysed the influence of technological processes used in the various buckwheat groat mills on the phenolic content and antioxidant activity of common buckwheat grains and groats. Dehulling, to a greater extent, influenced the quantitative changes in rutin and caused its lowering. Due to this process, the antioxidant activity decreased t...

Adequate supply of minerals in the diet is necessary for the proper functioning of the human body. In recent years gluten-free diet, which rigorous forms may lead to deficiencies of mineral components (especially Mg, Mn, Zn and Cu), is becoming more and more popular. Buckwheat grains do not contain gluten, and their nutritional value is very high....

In recent years special attention has been paid to gluten-free foods, and among them buckwheat grains are becoming more popular. They are a rich source of many nutrients, including mineral compounds, and are eaten in many forms, eg. as a “kasha” which is obtained from roasted and dehulled grains. Food processing causes various changes in chemical c...

One of the latest neurotoxic and carcinogenic substances discovered in food is acrylamide (AA). The main pathway for AA formation in foods is the Maillard reaction (MR). Heat treated carbohydrate-rich foods such as potato, cereal and bakery products, together with coffee contain high levels of acrylamide. The high consumption of coffee in many coun...

Toxic elements like lead and cadmium are considered harmful to human health. These elements do not have any useful function in an organism. They are known only for their negative actions, which can be tolerated by human body only in certain limits. Carrots may absorb these toxic elements from the soil they grow in. The presence of the contaminants...

This study investigated the effects of storage and temperature duration on the stability of acrylamide (AA) and 5-hydroxymethylfurfural (HMF) in selected foods with long shelf-life. Products were analysed fresh and stored at temperatures of 4 and 25 °C after 6 and 12 months (with the exception of soft bread samples, which were analysed after 15 and...

Our team has prepared a comprehensive overview of current knowledge on the types of nanoparticles. Characterized their division criteria, defined scheme for the synthesis and applications, as well as threats to health with particular emphasis on toxicity.

Total phenolic compounds were analyzed in dry leaves and infusions of green tea cultivated in different countries (China, Japan, Vietnam). It was shown that phenolic’s content depended on the kind of analyzed tea and time of leaves extraction. The best source of these components came from Japan and Vietnam. In most infusions the content of phenolic...

The article gives the possibility of using digital image analysis (DIA) in the agro-food sector. Three main directions of this method have been identified: livestock production, plant production and the possibility of its use for the control and evaluation of the quality of the food products. Analysis of the available informations allows to affirm...

The influence that food heating has on the concentration of acrylamide in home-cooked potato dishes prepared by high-temperature, such as pan-frying, deep-frying, roasting and microwave heating was analyzed. The experiment was performed with commercially available deep-frozen par-fried French fries and deep-frozen par-fried potato products other th...

The aim of the study was to determine whether phenolic compounds in some varieties of buckwheat, winter and spring barley and peas can be used as factors which distinguish selected cultivars and varieties of plant material. It was observed that the content of total phenolics might be useful as a cultivar-distinguishing factor for all the plant mate...

High-performance liquid chromatography was used to study the stability of folate vitamers in two types of rye breads after baking and 16 weeks of frozen storage. Bread made using sourdough seeds contained less total folate (74.6 microg/100 g dry basis, expressed as folic acid) than the whole rye flour (79.8 microg/100 g dry basis) and bread leavene...

Ferulic acid (3-methoxy-4-hydroxycinnamic acid) is the main phenolic acid occurring in cell walls of monocotyledones. Due to its blue-and-white fluorescence it is easily identified and is located in the cereal grain morphological parts. Its 40-fold greater concentration was found in the cells walls of the seed coat and aleuronic layer than in the c...