Ozone treatment of stored potato tubers

During storage, potato tubers are susceptible to different pathogen, which can attack the skin and flesh of the tubers. The most serious damage can be caused by rot inducing bacteria and fungi. A possible way to prevent microbial damage may be the use of ozone in the air ventilated through the stored tubers. However, the tubers can undergo qualitative changes, e.g. dehydration and loss of starch content. This article presents the results of a five-month experiment in which ozone concentration of 5 mg m-3 was periodically introduced in some of the stored potato tubers of the cultivar ‘Dali’. All potato tubers were stored in closed storage boxes with a metal frame and wood panels in the floor and walls (ground area 1.6×1.2 m, height 0.95 m) which were continuously aerated using the ambient air in a potato warehouse. There was 900 kg of tubers stored in the box. At the end of the experiment, the ozonated variant was compared with the control (not treated). The ozone-treated tubers had 2.95 times lower incidence of infection by rot and the number of microorganisms on healthy tubers was lower than the control. The ozone-treated tubers were less frequently dehydrated. The water loss was higher in control by 0.86 %. There was no significant difference in silver scurf manifestation or in the starch content between the two variants

Graphene-Based Photodynamic Therapy and Overcoming Cancer Resistance Mechanisms: A Comprehensive Review

Hanna Dilenko, Kateřina Bartoň Tománková, Lucie Válková, Barbora Hošíková, Markéta Kolaříková, Lukáš Malina, Robert Bajgar, Hana Kolářov&#x00E1Department of Biophysics, Faculty of Medicine and Dentistry, Palacky University, Olomouc, Czech RepublicCorrespondence: Kateřina Bartoň Tománková, Department of Biophysics, Faculty of Medicine and Dentistry, Palacky University, Hněvotinska 3, Olomouc, 77900, Czech Republic, Tel +420 733 690 914, Email [email protected]: Photodynamic therapy (PDT) is a non-invasive therapy that has made significant progress in treating different diseases, including cancer, by utilizing new nanotechnology products such as graphene and its derivatives. Graphene-based materials have large surface area and photothermal effects thereby making them suitable candidates for PDT or photo-active drug carriers. The remarkable photophysical properties of graphene derivates facilitate the efficient generation of reactive oxygen species (ROS) upon light irradiation, which destroys cancer cells. Surface functionalization of graphene and its materials can also enhance their biocompatibility and anticancer activity. The paper delves into the distinct roles played by graphene-based materials in PDT such as photosensitizers (PS) and drug carriers while at the same time considers how these materials could be used to circumvent cancer resistance. This will provide readers with an extensive discussion of various pathways contributing to PDT inefficiency. Consequently, this comprehensive review underscores the vital roles that graphene and its derivatives may play in emerging PDT strategies for cancer treatment and other medical purposes. With a better comprehension of the current state of research and the existing challenges, the integration of graphene-based materials in PDT holds great promise for developing targeted, effective, and personalized cancer treatments.Keywords: graphene quantum dots, graphene oxide, cancer research, photosensitizers, drug deliver

Možnosti a způsoby využití kalů a sedimentů z ČOV:Odpadní vody a čistírenské kaly v regionu Svitavy - ekonomická úvaha

Charakteristika svitavského regionu, počet obyvatel, počet obyvatel zásobovaných vodou, napojení na kanalizace a ČOV. Zdroje znečišťování v regionu, kanalizace, čistírny OV a jejich kapacity. Technologie ČOV, technologie zpracování kalů, nakládání s kaly, kvalita kalů, současné možnosti využití a odstraňování produkovaných kalů. Ekonomika provozu čistírny OV. Legislativa, investiční a technologické nároky výhledu legislativy

Možnosti a způsoby využití kalů a sedimentů z ČOV

Využití a odstraňování kalů z ČOV v ČR. Rešerše za období roku 2003. Současný stav, provozní poznatky - vyhodnocení schopností hlavních producentů kalu využít kaly v zemědělství. Ekonomická úvaha - posouzení procesu využívání a odstraňování kalů v ČR v regionu Svitavska. Poloprovozní ověření recyklace ČOV kalů. Vliv aplikace kalů na zemědělskou půdu a rostlinnou produkci. Kaly z ČOV v ČR, zejména se zaměřením na mikrobiologické ukazatele