scholarly journals COSMOtherm as an Effective Tool for Selection of Deep Eutectic Solvents Based Ready-To-Use Extracts from Graševina Grape Pomace

Molecules ◽  
2021 ◽  
Vol 26 (16) ◽  
pp. 4722
Author(s):  
Manuela Panić ◽  
Veronika Gunjević ◽  
Kristina Radošević ◽  
Marina Cvjetko Cvjetko Bubalo ◽  
Karin Kovačević Kovačević Ganić ◽  
...  

The aim of this work is to develop an industrially suitable process for the sustainable waste disposal in wine production. The proposed process involves the development of an environmentally friendly method for the isolation of biologically active compounds from Graševina grape pomace according to the green extraction principles, in order to obtain a ready-to-use extract. In this process, deep eutectic solvents (DES) were used as extraction solvents. Aiming to save time in selecting the optimal DES that would provide the most efficient Graševina pomace polyphenols extraction, the user-friendly software COSMOtherm was used and 45 DES were screened. Moreover, the prepared extracts were chemically and biologically characterized to confirm their safety for human application. Computational and experimental results proved the applicability of COSMOtherm in the selection of the optimal DES for the environmentally friendly preparation of the ready-to-use extract from Graševina grape pomace with expected application in the cosmetic industry.

Separations ◽  
2021 ◽  
Vol 8 (7) ◽  
pp. 89
Author(s):  
Jan Javorský ◽  
Martin Král ◽  
Marek Šnirc ◽  
Július Árvay ◽  
Bohuslava Tremlová ◽  
...  

Knowledge of analytical values in wines is essential to ensure product safety and compliance with legislation, and it is also essential to understand the various technologies in wine production. The aim of this work was to evaluate the analytical parameters of bottled Moravian wines from the Znojmo sub-region, from harvests 2015 and 2016. Basic oenological parameters and biologically active substances were evaluated. Moreover, we evaluated conditions during bottle aging in wines from harvest 2016. The results of the basic analytical values such as total phenolic acid (TPA), total sulfur dioxide (SO2), pH, actual alcohol content (EtOH), and titratable acidity (TA) were in accordance with generally known values in wines and met the legislative requirements within oenological practices. Biologically active substances, such as gallic acid, trans-caffeic acid (TCA), trans-p-coumaric acid (TPCA), rutin, ferulic acid (FA), myricetin, resveratrol, and quercetin were identified. Comparing the analytical values of individual types of wine leads to a better understanding of winemaking technology and the development of wine as such. The subject of the study was also the monitoring of produced grape pomace incurred during wine production harvest 2015 with the indication of possibilities of its further use.


2020 ◽  
Vol 22 (98) ◽  
pp. 88-93
Author(s):  
V. P. Lyasota ◽  
A. V. Kolodka

The rapid development of poultry farming requires increasing requirements for the safety and quality of products. This is especially true for broiler chickens, turkeys and meat production. Over the past decade, research by many scientists has shown that fundamental knowledge of the conditions of interaction of the microorganism with the microflora that inhabits biotopes and the creation and widespread introduction into practice of biological products from living or lyophilized microbial cultures – probiotics – is very important. Bacterial preparations based on living microbial cultures – probiotics – have become widespread in the technological process of growing poultry in most countries of the world, including in Ukraine. The microorganisms that make up the probiotic are representative of the normal gut flora; have high antagonistic properties against opportunistic and pathogenic microflora, even those that are insensitive to many antibiotics; have the ability to activate macrophages, ie to influence the intensity of phagocytosis; have the ability to enhance the induction of interferon, ie to influence the increase of factors of natural resistance of animals; to influence the regulation of metabolism in the body of animals, vitamin balance, intestinal digestion; have the ability to produce biologically active substances. To date, studies in the field of bacteriotherapy and prevention of various pathological conditions in animals and poultry associated with disorders of the composition of the normal gut flora are quite relevant. However, in spite of the positive characteristics that pay tribute to probiotic drugs, there are still three areas of concern for improving such drugs in order to achieve their effectiveness in use. First, the microorganisms that make up the probiotic, to a greater or lesser extent, have poor patency through the upper divisions of the digestive canal due to the action of gastric juice and enzymes on them, and therefore do not reach the thick compartment in the amount required to provide required effect. Secondly, if a small number of microorganisms in the composition of the probiotic and has reached the large intestine – it can get bad in the already competitive environment of pathogenic and pathogenic microorganisms already formed during this period. Third, in addition, the use of probiotics inhabits the thick intestine only by the microflora that is part of it and does not reproduce the diversity of its own microflora. The main advantages of probiotics over chemotherapeutic drugs and anti-tibiotics are that they are harmless to the body of the animal and are environmentally friendly. Due to the great attention to probiotics as environmentally friendly preparations, there is now an increase in the study of biological properties and selection of bacterial strains, the most promising in the probiotic respect. This is the direction of selection of strains specific for the intestinal biocenosis of a particular animal and poultry species, which have high colonization and antagonistic properties. Thus, nowadays, in poultry farming, it is impossible to completely abandon preventive vaccinations, disinfection, use of antibiotics, anthelmintics, coccidiostats and other chemotherapeutic drugs. After their use, the need for enriched diet of pro-and prebiotics increases many times over. This is justified by the need to improve the normal gut microbiota, which, in the first place, leads to increased nutrient uptake of feed and, as a consequence, to improve the nutritional and biological value of poultry products. However, in the current scientific literature, researchers have not sufficiently described the characteristics of the impact on the body of animals, including birds, the above nutraceuticals, also did not determine the quality and safety of slaughter products, did not substantiate their sanitary evaluation. Therefore, the development of new biotic drugs, especially domestic in time.


Foods ◽  
2022 ◽  
Vol 11 (1) ◽  
pp. 112
Author(s):  
Tea Sokač ◽  
Veronika Gunjević ◽  
Anita Pušek ◽  
Ana Jurinjak Tušek ◽  
Filip Dujmić ◽  
...  

Valorisation of grape pomace, a by-product of the winery industry, has been pushed into the spotlight in recent years since it can enable lower environmental impact, but it can also bring an added value to the wine production process by recovering several grape pomace biologically active compounds. The first step that allows for grape pomace reuse is its drying, which should be carefully performed in order to preserve the biologically active compounds’ stability. In this study, the effects of different drying methods on the stability of polyphenols, tannins and tartaric acid in grape pomace (Vitis vinifera) cv. Graševina were investigated. In particular, vacuum drying (at different temperatures: 35, 50 and 70 °C), conventional drying at 70 °C and open sun drying were performed and the drying kinetics was described using Peleg’s model. Considering the processing time and thermodynamics, vacuum drying at 70 °C was the most convenient processing method. Polyphenols were highly stable during drying, and slight degradation occurred during vacuum drying at 35 and 50 °C. Tannins and tartaric acid were more prone to degradation depending on the drying method applied and showed the greatest stability during vacuum drying at 70 °C.


Author(s):  
N. V. Makarova ◽  
D. F. Ignatova ◽  
N. B. Eremeyeva

The purpose of this work is to develop an optimal technology for extracting an antioxidant substances pack from grape extracts that are little used at present, grape pomace, a comparative study of the effect of ultrasound exposure with traditional infusion and microwave irradiation methods on the total content of phenols, flavonoids, anthocyanins, antiradical activity, restoring force when extracting wine production waste - grape pomace. Spectrophotometric methods for determining the total content of phenols, flavonoids, anthocyanins, antiradical activity with the free radical 2,2-diphenyl-1-picrylhydrazyl, restoring ability with the FRAP reagent, antioxidant activity in the model with linoleic acid were chosen as research methods. It is the application of ultrasonic extraction for grape pomace that allows obtaining a higher phenols content (1024 mg gallic acid / 100 g), flavonoids (562 mg catechin / 100 g), anthocyanins (987.45 mg cyanidin-3-glycoside / 100 g), antiradical activity (16.6 mg / cm3), regenerating force (17.01 mmol Fe2 + / 1 kg), antioxidant effect (42.4%). Microwave radiation has a similar effect on the level of a number of indicators of grape pomace extract. However, the indicators of microwave extracts of grape pomace are lower in value than ultrasonic extracts. According to the studies carried out, ultrasonic treatment at the same temperature parameters and process time can be recommended as an intensification method for grape pomace extract obtaining which can be a component of many biologically active additives, as well as cosmetics with a high level of antioxidant substances and antioxidant activity. This will provide extracts with a higher content of nutraceutical substances.


Molecules ◽  
2021 ◽  
Vol 26 (7) ◽  
pp. 1869
Author(s):  
Mariel Calderón-Oliver ◽  
Edith Ponce-Alquicira

Many current food and health trends demand the use of more ecological, sustainable, and environmentally friendly techniques for the extraction of bioactive compounds, including antioxidants. However, extraction yields and final antioxidant activities vary between sources and are highly influenced by the given extraction method and nature and ratio of the employed solvent, especially for total polyphenols, flavonoids, and anthocyanins, which are well recognized as natural antioxidants with food applications. This review focused on the most common extraction techniques and potential antioxidant activity in the food industry for various natural antioxidant sources, such as green tea, rosemary, clove, and oregano. Green extraction techniques have been proven to be far more efficient, environmentally friendly, and economical. In general, these techniques include the use of microwaves, ultrasound, high hydrostatic pressure, pulsed electric fields, enzymes, and deep eutectic solvents, among others. These extraction methods are described here, including their advantages, disadvantages, and applications.


Antibodies ◽  
2021 ◽  
Vol 10 (2) ◽  
pp. 20
Author(s):  
Iftekhar Mahmood

Antibody-drug conjugates (ADCs) are biopharmaceutical products where a monoclonal antibody is linked to a biologically active drug (a small molecule) forming a conjugate. Since the approval of first ADC (Gemtuzumab ozogamicin (trade name: Mylotarg)) for the treatment of CD33-positive acute myelogenous leukemia, several ADCs have been developed for the treatment of cancer. The goal of an ADC as a cancer agent is to release the cytotoxic drug to kill the tumor cells without harming the normal or healthy cells. With time, it is being realized that ADCS can also be used to manage or cure other diseases such as inflammatory diseases, atherosclerosis, and bacteremia and some research in this direction is ongoing. The focus of this review is on the clinical pharmacology aspects of ADC development. From the selection of an appropriate antibody to the finished product, the entire process of the development of an ADC is a difficult and challenging task. Clinical pharmacology is one of the most important tools of drug development since this tool helps in finding the optimum dose of a product, thus preserving the safety and efficacy of the product in a patient population. Unlike other small or large molecules where only one moiety and/or metabolite(s) is generally measured for the pharmacokinetic profiling, there are several moieties that need to be measured for characterizing the PK profiles of an ADC. Therefore, knowledge and understanding of clinical pharmacology of ADCs is vital for the selection of a safe and efficacious dose in a patient population.


Author(s):  
Yorick Bernardus Cornelis van de Grift ◽  
Nika Heijmans ◽  
Renée van Amerongen

AbstractAn increasing number of ‘-omics’ datasets, generated by labs all across the world, are becoming available. They contain a wealth of data that are largely unexplored. Not every scientist, however, will have access to the required resources and expertise to analyze such data from scratch. Fortunately, a growing number of investigators is dedicating their time and effort to the development of user friendly, online applications that allow researchers to use and investigate these datasets. Here, we will illustrate the usefulness of such an approach. Using regulation of Wnt7b expression as an example, we will highlight a selection of accessible tools and resources that are available to researchers in the area of mammary gland biology. We show how they can be used for in silico analyses of gene regulatory mechanisms, resulting in new hypotheses and providing leads for experimental follow up. We also call out to the mammary gland community to join forces in a coordinated effort to generate and share additional tissue-specific ‘-omics’ datasets and thereby expand the in silico toolbox.


1969 ◽  
Vol 62 (3) ◽  
pp. 521-536 ◽  
Author(s):  
M. L. Aubert ◽  
J.-P. Felber

ABSTRACT In investigations on the production and the specificity of anti-ACTH antibodies used for radioimmunoassay, differences have been observed between the various antibodies obtained. It was shown by means of competitive inhibition with different ACTH fragments that the binding of the ACTH molecule to its antibody can occur at different sites along the ACTH peptide. By varying the concentrations of the fragments and the conditions of the assays, it was possible to study the properties of each antibody. Thus antibodies which bind the N-terminal portion, or which exclusively bind the biologically active part of the ACTH chain (1–20), are the most suitable for radioimmunoassay. It was found, however, that the production of antiserum was generally more frequent when binding occurred to the C-terminal portion of the ACTH peptide. Should the presence of such fragments in plasma be confirmed, then the use of these antisera could lead to erroneous measurement of biologically inactive ACTH fragments. Thus, this study reveals that a selection of the antibody for specificity might be necessary for its application to the radioimmunoassay of plasma ACTH, and that this selection could be performed with the use of ACTH fragments. An approach to the problem of binding sites between antigen and antibody has been described and the possibility of introducing a radioimmunoassay for plasma ACTH fragments discussed.


Author(s):  
L.L. Zakharova ◽  
◽  
G.A. Zhorov ◽  
V.I. Dorozhkin ◽  
◽  
...  

Negative impact on the environment as a result of economic activity of man increasingly becomes the character of combined pollution of ecotoxicants, including xenobiotics of radiation and chemical nature. In animal husbandry in ecologically unfavorable regions, sorbtion-detoxication technologies based on the complex application of bioprotective substances of different origin are used to reduce the intake and accumulation of xenobiotics, to normalize the physiological state of animals and to obtain safe products. It is necessary to observe certain principles ensuring compatibility of components, a wide range of bioprotective action, efficiency and safety at their use in developing the compositions of such sorption-detoxifying complexes. The article substantiates the criteria that should be followed in creating sorption-detoxifying complexes and presents groups of drugs with different mechanisms of action (sorbents, antioxidants, immunomodulators, adaptogens and other biologically active substances) for inclusion in the formulations of combined compositions.


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