Results 11 to 20 of about 5,494,217 (358)

The Protection of Building Materials of Historical Monuments with Nanoparticle Suspensions

Heritage, 2021
Marble and limestone have been extensively used as building materials in historical monuments. Environmental, physical, chemical and biological factors contribute to stone deterioration.
Efstathia I. Pavlakou, Anastasios G. Agrafiotis, Theokleiti G. Tsolaki, Christine Lemonia, Emily Zouvani, Christakis A. Paraskeva, Petros G. Koutsoukos   +6 more
doaj   +1 more source

Experimental Design and Optimization of Recovering Bioactive Compounds from Chlorella vulgaris through Conventional Extraction

Molecules, 2021
Microalgae contain an abundance of valuable bioactive compounds such as chlorophylls, carotenoids, and phenolics and, consequently, present great commercial interest.
Ioulia Georgiopoulou, Soultana Tzima, Georgia D. Pappa, Vasiliki Louli, Epaminondas Voutsas, Kostis Magoulas   +5 more
doaj   +1 more source

Protection of Historical Mortars through Treatment with Suspensions of Nanoparticles

Heritage, 2023
Mortars, which are very important elements for the integrity of historic monuments, consist mainly of calcium carbonate and silicates in different proportions.
Efstathia I. Pavlakou, Christine Lemonia, Emily Zouvani, Christakis A. Paraskeva, Petros G. Koutsoukos   +4 more
doaj   +1 more source

Practical Artificial Neural Network Tool for Predicting the Competitive Adsorption of Dyes on Gemini Polymeric Nanoarchitecture [PDF]

Kemija u Industriji, 2021
The objective of this study was to model the removal efficiency of ternary adsorption system using feed-forward back propagation artificial neural network (FFBP-ANN).
Abdelmadjid El Bey, Maamar Laidi, Amina Yettou, Salah Hanini, Abdellah Ibrir, Mohamed Hentabli, Hasna Ouldkhaoua   +6 more
doaj   +1 more source

Recent Advances in Supercritical CO₂ Extraction of Pigments, Lipids and Bioactive Compounds from Microalgae

Molecules, 2023
Supercritical CO2 extraction is a green method that combines economic and environmental benefits. Microalgae, on the other hand, is a biomass in abundance, capable of providing a vast variety of valuable compounds, finding applications in the food ...
Soultana Tzima, Ioulia Georgiopoulou, Vasiliki Louli, Kostis Magoulas   +3 more
doaj   +1 more source

Process Optimization of Microwave-Assisted Extraction of Chlorophyll, Carotenoid and Phenolic Compounds from Chlorella vulgaris and Comparison with Conventional and Supercritical Fluid Extraction

Applied Sciences, 2023
The production of bioactive products from microalgae biomass with efficient and environmentally friendly technologies is a field of great research interest.
Ioulia Georgiopoulou, Soultana Tzima, Vasiliki Louli, Kostis Magoulas   +3 more
doaj   +1 more source

Recovery of Bioactive Extracts from Olive Leaves Using Conventional and Microwave-Assisted Extraction with Classical and Deep Eutectic Solvents

Separations, 2022
The recovery of phenolic compounds from olive leaves (Olea europaea L.) has received special attention due to their significant potential for applications in food, nutraceuticals, cosmetics, and pharmaceuticals.
Eleni Boli, Nikos Prinos, Vasiliki Louli, Georgia Pappa, Haralambos Stamatis, Kostis Magoulas, Epaminondas Voutsas   +6 more
doaj   +1 more source

Supercritical CO₂ Extraction of High-Added Value Compounds from Chlorella vulgaris: Experimental Design, Modelling and Optimization

Molecules, 2022
Microalgae are well-known for their high-added value compounds and their recovery is currently of great interest. The aim of this work is the recovery of such components from Chlorella vulgaris through supercritical fluid extraction (SFE) with CO2.
Ioulia Georgiopoulou, Soultana Tzima, Vasiliki Louli, Kostis Magoulas   +3 more
doaj   +1 more source

Thermodynamic Analysis of the Adsorption and Micellization Activity of the Mixtures of Rhamnolipid and Surfactin with Triton X-165

Molecules, 2022
The surface tension of aqueous solutions of Triton X-165 with rhamnolipid or surfactin mixtures was measured. The obtained results were applied for the determination of the concentration and composition of the Triton X-165 and biosurfactants mixture at ...
Edyta Rekiel, Anna Zdziennicka, Katarzyna Szymczyk, Bronisław Jańczuk   +3 more
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Problems of training scientific and pedagogical staff in chemistry in pre-revolutionary universities of Ukraine (19th – early 20th centuries)

Вісник Харківського національного університету: Серія xімія, 2021
The article identifies a number of problems that arose in the process of training students in chemistry at Ukrainian universities in the 19th – early 20th centuries.
Sergii Kulish
doaj   +1 more source