HYBRID EVENT: You can participate in person at Paris, France or Virtually from your home or work.
Paris, France
September 30 - October 2, 2021

Najda Agnieszka

Speaker at Plant Science Conferences 2021- Najda Agnieszka
Najda Agnieszka
University of Life Sciences in Lublin, Poland
Title : Quality of the herb Mentha x Piperita L. var. Officinalis Sole f. Pallescens Camus modified by drying at high temperatures in a vacuum


The study determined the effect of temperature (45 to 85 °C) during the vacuum drying process of the Mentha x piperita L. var. officinalis Sole f. pallescens Camus for the quality of the raw material. Herb color and chlorophyll content, the sum of polyphenolic compounds (TPC) and flavonoids (TFC) as well as the antioxidant activity of the extracts were analyzed using the DPPH test. Drying affects the quality of the product, however, vacuum drying occurs at a lower pressure than atmospheric pressure. A slight change in the color and chlorophyll content of the tested samples was observed due to the elevated temperature. Most TPC, TFC were obtained at 45 and 65 °C. Antioxidant activity was modified by the conditions of the drying process and the content of polyphenols.
• The tests improve the drying process while maintaining the best quality parameters of the raw material.
• A practical aspect is the possibility of using vacuum drying at high temperatures with more than twice the process time.
• The obtained raw material is characterized by the color desired by the consumer and longer storage time.


Agnieszka Najda has completed his PhD at the age of 32 years from Agricultural Academy, Lublin in Poland and postgraduate studies Laboratory Analytics in Environmental Protection from University of Life Sciences in Lublin. Hhe is the direktor of the Laboratory of Quality of Vegetables and Medicinal Plants, a premier analitical facility in East Poland. She has published more than 67 papers in reputed journals and has been serving as an editorial board member of repute Frontiers in Crop Biology and Sustainability and Hindawi Publishing Corporation. She is a member of the research team of the Biostrateg 2 project entitled "Development of innovative technologies for the comprehensive utilization of waste generated during fattening pigs" No. BIOSTRATEG2 / 298357/8 / NCBR / 2016.