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Bonn Polyphenols 2018 saw an unprecedented diversity of topics in polyphenols research

Bonn Polyphenols 2018 saw an unprecedented diversity of topics in polyphenols research

In continuation of 11 successful conferences, the 12^th edition of the World Congress on Polyphenols Applications was held in Bonn at the end of September 2018. This two-and-a-half day event took place in the new lecture hall building of the University of Bonn, which celebrates its 200^th anniversary in 2018. Local organizer Prof. Dr. Andreas Schieber, Chair of Molecular Food Technology, and his team welcomed more than 210 attendees coming from all continents and representing both the academia and the industry, who witnessed a broad range of topics unprecedented in this series of conferences. Extended lectures, numerous short oral presentations, and close to 100 poster presentations built the scientific framework of this conference and included, among others, polyphenols-microbiome interactions, metabolism and health effects, chemistry and analysis, food technology and biotechnology, plant physiology, and innovative applications of polyphenols. A special session on polyphenols as natural pigments and antioxidants was dedicated to Prof. Dr. Reinhold Carle from the University of Hohenheim, Stuttgart, for his outstanding contributions to polyphenols research. The laudatio was held by one of his former mentees, Prof. Dr. Ralf Schweiggert.

The introductory session focused on polyphenol-microbiota interactions, with extended presentations given by Prof. Dr. Marvin Edeas, Dr. Daniela Graf, and Prof. Dr. Michael Gänzle. For the first time in this series of conferences, two lectures addressed biotechnological aspects of polyphenols. Prof. Dr. Matteos Koffas provided an overview of the development of microbial platforms for plant polyphenols production, and Prof. Dr. Wilfried Schwab presented his latest findings on the biosynthesis of acylphloroglucinols in strawberries. Prof. Dr. Ute Nöthlings reviewed epidemiological perspectives of polyphenols and chronic disease risk. Prof. Dr. Jan Frederick Stevens showed that non-estrogenic derivatives of xanthohumols improve cognitive function in diet-induced obese mice. According to Dr. Sebastian Soukup, considerable species differences can be observed in isoflavone metabolism, which may have biological implications. Analytical advances in polyphenols research were presented by Dr. Christoph Steingass, who introduced unique phenolic compounds as authenticity markers of pineapple. Prof. Dr. Richard Maroun and Dr. Christine Fuchs highlighted the potential of by-products emerging from plant food processing. Prof. Dr. Mario Ferruzzi and Prof. Dr. Isabel Odriozola Serrano provided an overview of the effects of processing on the stability and bioactivity of phenolic compounds. Dr. Kirsten Berger reported on the in vitro inhibitory effects of phenolics from red fruit juices on alpha-amylases and alpha-glucosidases. Tannin-rich blends of polyphenols may be used as alternative growth promotors in poultry chicken, as demonstrated in a study presented by Dr. Leandro Martin Redondo. Prof. Dr. Reinhold Carle reviewed strategies to enhance the color stability of anthocyanins, and Dr. Judith Müller-Maatsch investigated phenolics from mango peels and rooibos as copigments.

During a live broadcast in the lecture hall building where the conference was held, the University of Bonn received notification of six successful applications for German Clusters of Excellence, and the Rector of the University of Bonn, Prof. Dr. Dr. Michael Hoch, invited the conference participants to celebrate this huge success with the University.

Prof. Dr. Mario Ferruzzi from North Carolina State University Kannapolis, USA, received the 2018 Polyphenols Award for his presentation “Effects of processing on the bioactivity of phenolic compounds”. Prof. Dr. Dea Anton from the Estonian University of Life Sciences was recognized for her poster presentation “Antimicrobial and antioxidative effects of rhubarb, tomato and berry powder in raw and cooked pork”.

In his concluding remarks, Andreas Schieber highlighted the impressive quality of the congress contributions and announced that the 13^th edition of the World Congress on Polyphenols Applications will take place in 2019. The search for a venue will be a priority task of the scientific committee and the outcome will be published in due course.

During the congress, The Scientific Committee descerned following awards:

	Scientific Contribution Award  "Processing as a modifier of polyphenol delivery and bioactivity" Prof. Mario Ferruzzi, North Carolina State University, Kannapolis, USA Read more
	Poster Presentation Award “Antimicrobial and antioxidative effects of rhubarb, tomato and berry powders in raw and cooked pork". Dea Anton, Estonian University of Life Sciences, Estonia Read more

On behalf of all the members of Scientific Committee and President, we thank you for your participation. See you next year.

Prof. Mario Ferruzzi was awarded for his scientific contribution

The poster contribution award was delivered to Dea Anton

During the 12th World Congress on Polyphenols Applications organized in Bonn, Germany on September 25-28, 2018, the Scientific Committee awarded Dea Anton from Estonian University of Life Sciences, Estonia for her poster presentation entitled “Antimicrobial and antioxidative effects of rhubarb, tomato and berry powders in raw and cooked pork".

"Our research group participated at the congress with two poster presentations, the results of the research, carried out under the international project SUSMEATPRO and Estonian University of Life Sciences financed project.

In preliminary tests (poster presented by Piret Raudsepp) different plant parts of different cultivars with the best antioxidative and antimicrobial properties were selected for further use as berry or vegetable powders in meat products. The product studies showed the capability of plant supplements to reduce bacterial load, inhibit lipid oxidation, prolong the shelf-life and improve sensory qualities of meat products. The ongoing and future research will be focused on plant powder blends and finding out specific polyphenolic compounds responsible for these beneficial effects.

We attended the World Congress on Polyphenols Applications for the first time and we enjoyed it very much. It was a well organized event, interesting oral presentations, plenty of room for posters and time to read, think and discuss. We met the researchers of different research fields willing to co-operate and representatives of food industry interested in our results. We got good memories and experience from this year. The recognition motivates us to continue our research, to achieve more interesting results and present our findings at forthcoming congresses".

Important/Bonn Polyphenols Congress venue Exact address

Dear Attendees of Bonn Polyphenols 2018, 

 

 

We remind you the exact address of venue for the congress:

 

Endenicher Allee 19c, D-53115 Bonn, Germany

 

Please use this address instead of address marked on your Ticket.

 

 

Best regards, 

 

Bonn Polyphenols Secretariat

Updated program and Info

www.polyphenols-site.com

Prof. Ralf Schweiggert will join the Bonn Polyphenols 2018 to give a laudation

Prof. Dr. Habil. Ralf Schweiggert will join the 12th World Congress on Polyphenols Applications: Bonn Polyphenols 2018 and will give a laudation to Professor Reinhold Carle to honor his considerable achievements in research on polyphenols.

Professor Dr. habil. Ralf Schweiggert holds the full professorship “Analysis and Technology of Plant-based Foods” at Geisenheim University in Germany. Prior to working several years in the nutraceutical industry at DSM Nutritional Products (Kaiseraugst, Switzerland), he has been a post-doctoral mentee of Professor Reinhold Carle at the University of Hohenheim for several years.

For more information: www.polyphenols-site.com

Biosynthesis of acylphloroglucinols: novel phenolics from strawberry fruit

Prof. Wilfried Schwab from Technical University of Munich, Freising, Germany will talk about "Biosynthesis of acylphloroglucinols: novel phenolics from strawberry fruit" during the 12th World Congress on Polyphenols Applications: Bonn Polyphenols 2018 which will be held at the University of Bonn, Germany in September 25-28, 2018.

Summary of talk: "Polyphenolic compounds have health-promoting properties and are a major group of secondary metabolites in fruit crops. Through reverse genetic analysis of the functions of ripening-related genes in strawberry (Fragaria × ananassa) we discovered four acylphloroglucinol (APG)-glucosides as native Fragaria spp. fruit metabolites whose levels were differently regulated in the transgenic fruits. The biosynthesis of the APG aglycones was investigated by examination of the enzymatic properties of three recombinant Fragaria vesca chalcone synthase proteins."

For more information: www.polyphenols-site.com

Impact of diet on human gut microbiota composition and functionality

Dr. Daniela Graf from Max Rubner-Institut, Karlsruhe, Germany will present on overview on the role of diet on the human gut microbiota during the 12th World Congress on Polyphenols Applications: Bonn Polyphenols 2018 which will be held at the University of Bonn, Germany in September 25-28, 2018.

According to Dr. Graf:
Diet is a key factor that influences gut microbiota composition. Specific diets e.g. Western diets have an impact on gut microbiota composition and thus it’s functionality, which in turn will influence host health. The aim of this speech is to summarize how diet can affect gut microbiota composition and it will give an overview of recently published evidence from human in vivo studies on the gut microbiota-modulating effects of diet.

For more information: www.polyphenols-site.com

To know more about Bonn Polyphenols 2018 Speakers & Agenda, please click here

Polyphenols-microbiome interactions from a food microbiologist’s view

Prof. Michael Gänzle from the University of Alberta, Canada, will present on the interactions of phenolic compounds and intestinal microbiota during the 12th World Congress on Polyphenols Applications: Bonn Polyphenols 2018 which will be held at the University of Bonn, Germany in September 25-28, 2018.

Phenolic compounds have multi-faceted interactions with intestinal microbiota, which are based on their use as substrate for microbial metabolism, their direct and selective antimicrobial activity, and their interference with polysaccharide hydrolysis by host and intestinal enzymes. This presentation will explore the modulation of intestinal microbiota, using microbiota of (fermented) foods as experimentally tractable models for intestinal ecosystems.

For more information: www.polyphenols-site.com

Stabilization of anthocyanins by co-pigmentation using mango peel and rooibos phenolics

During the 12th World Congress on Polyphenols Applications: Bonn Polyphenols 2018, Judith Müller-Maatsch from University of Hohenheim, Germany will talk about "Stabilization of anthocyanins by co-pigmentation using mango peel and rooibos phenolics".

Short summary of talk: "Anthocyanins are highly susceptible to light exposure, temperature, and oxygen, thus, the color of anthocyanin-rich products lacks in stability during processing and subsequent storage. Anthocyanins’ susceptibility to degradation is primarily determined by their molecular structure and the surrounding matrix, i.e. pH, water activity, hydrocolloid content, and concomitant phenolic compounds named co-pigments. Co-pigmentation describes the interaction of anthocyanins and co-pigments that results in a modulation of color and a change in anthocyanin stability. Phenolics of mango peels as well as rooibos have been observed to effectively modulate the color of strawberry anthocyanins. Whereas phenolics based on gallic acid deriving from mango peel  pronouncedly modulated the color, phenolics from rooibos further increased the stability of anthocyanins during heating."

For more information: www.polyphenols-site.com

Investigating the biological activities of extracts from winery by-products

During the 12th World Congress on Polyphenols Applications: Bonn Polyphenols 2018, Christine fuchs, from Technische Universitaet Kaiserslautern, Kaiserslautern, Germany will talk about "Investigating the biological activities of extracts from winery by-products".

Talk summary: Winery by-products, such as pomace, stem, grapevine leaves and shoots, arise in high amounts during the wine-making process. Due to high contents of secondary plant metabolites, such as polyphenols, their usage as sources of bioactive compounds offers an opportunity to obtain value-added products from these by-products for the food, cosmetics and pharmaceutical industry. The aim of the present study was to investigate extracts from winery by-products of vitis vinifera L. cv. Riesling concerning their chemical composition and biological activities in vitro. Effects on cell viability, intracellular ATP, the mitochondrial membrane potential (MMP) and intracellular ROS were determined in the human hepatocarcinoma cell line HepG2.

For more information: www.polyphenols-site.com

Why biotransformation matters: species differences in isoflavone metabolism and biological implications

Dr. Sebastian Soukup from the Max Rubner-Institut, Germany will discuss the topic "Why biotransformation matters: species differences in isoflavone metabolism and biological implications" during the 12th World Congress on Polyphenols Applications: Bonn Polyphenols 2018 which will be held at the University of Bonn, Germany in September 25-28, 2018.

Summary of talk: "Isoflavones are associated with beneficial health effects such as the alleviation of menopausal symptoms and the prevention of osteoporosis, but are also discussed to have proliferative effects on ER-sensitive breast cancer.
To investigate physiological effects of bioactive compounds, animals models are widely used. Since species differences in metabolism can lead to changes in bioactivity and biokinetic behaviour of the compounds investigated, they have to be considered when extrapolating results to the human situation. In this presentation, analytical aspects of biotransformation studies as well as recent findings about isoflavone metabolism in different animal models and humans will be outlined and their biological implications discussed."  

For more information: www.polyphenols-site.com

Pineapple (Ananas comosus (L.) Merr.) as a source of unique phenolic compounds: analysis and applications as authenticity markers

Prof. Christof Steingass from University of Hohenheim, Germany will give presentation entitled "Pineapple (Ananas comosus (L.) Merr.) as a source of unique phenolic compounds: analysis and applications as authenticity markers" during the 12th World Congress on Polyphenols Applications: Bonn Polyphenols 2018 which will be held at the University of Bonn, Germany in September 25-28, 2018.

Prof. Steingass will present the LC-MS analysis of unique phenolic compounds in the pineapple infructescence as well as their applications as authenticity markers for pineapple juice obtained from different fruit fractions (i.e., edible flesh, flesh adhered to the shell, and milled peel).

For more information: www.polyphenols-site.com

The effects of novel processing technologies on the stability of polyphenols

Prof. Isabell Odriozola Serrano from university of Lleida, Spain will present her study on "The effects of novel processing technologies on the stability of polyphenols" during the 12th World Congress on Polyphenols Applications: Bonn Polyphenols 2018 which will be held at the University of Bonn, Germany in September 25-28, 2018.

The aim of this presentation is to provide an update on the state of the art of novel processing technologies with special focus on the impact of pulsed electric fields, high pressure and pulsed light treatments on the stability of polyphenols in plant-based foods. The main advantages as well as some critical points of the introduction of novel processing technologies to keep/improve the antioxidant potential of plant-based foods will be discussed.

For more information: www.polyphenols-site.com

Polyphenols and natural pigments: what are the food & beverages applications?

The Scientific Committee of Bonn Polyphenols 2018 decides to allocate more time to discuss about Polyphenols as natural pigments and additives, and their applications in the food & beverage industries. This special session is organize on September 28.

The industrials from Food & beverage look to replace synthetic colorants with more respectful natural pigments. However many barriers remain in term of extraction, stabilization and industrial applications.

Read more...

Polyphenols and chronic disease risk: epidemiological perspectives

Prof. Ute Nöthlings, Professor for Nutritional Epidemiology at the Department of Nutrition and Food Sciences, Bonn University, will present an overview over recent epidemiological studies investigating associations between polyphenol exposure and chronic disease risk during the 12th World Congress on Polyphenols Applications: Bonn Polyphenols 2018 which will be held at the University of Bonn, Germany in September 25-28, 2018.

Epidemiological studies play a role in exploring associations of polyphenol and polyphenol-rich food intake and risk of chronic diseases, and ultimately back evidence based dietary recommendations. Evidence exists showing inverse associations for diabetes mellitus type 2, cardiovascular diseases, cancer and neurodegenerative disease, but heterogeneity exists. Important aspects when evaluating the evidence are study designs and assessment of exposure. The talk will give an overview over recent evidence, with a focus on specific methodological perspectives.

For more information: www.polyphenols-site.com

Processing as a modifier of polyphenol delivery and bioactivity

Prof. Mario Ferruzzi from North Carolina State University, Kannapolis, USA will give a presentation entitled "Processing as a modifier of polyphenol delivery and bioactivity" during the 12th World Congress on Polyphenols Applications: Bonn Polyphenols 2018 which will be held at the University of Bonn, Germany in September 25-28, 2018.

Summary:  As evidence mounts for a health-protective role for dietary polyphenols, the importance of understanding factors that modify the delivery of specific polyphenol metabolites to target tissues has increased.  Food formulation and processing are believed to be significant modifiers of polyphenol bioavailability.This lecture will present data from our past and ongoing efforts focused on understanding food matrix and processing parameters as they intersect with select physiological factors to impact absorption, metabolism and tissue distribution of polyphenols.

For more information: www.polyphenols-site.com

Phenolic compounds in Food waste valorization: figures and perspectives

During the 12th World Congress on Polyphenols Applications: Bonn Polyphenols 2018 which will be held at the University of Bonn, Germany in September 25-28, 2018, Prof. Richard Maroun from Saint-Joseph University of Beirut, Beirut, Lebanon will give presentation about "Phenolic compounds in Food waste valorization: figures and perspectives".

According to Prof. Richard Maroun: "Food waste valorization practices have gained much attention lately as a means of sustainable management. These materials constitute an underexploited source for the recovery of natural compounds. The value of food byproducts is associated with their content in dietary fibers and several bioactive molecules which can be capitalized in the food, pharmaceutical, cosmetic and nutraceutical industries. One of the main molecules extracted and purified are polyphenols. Our work aims to purify these natural antioxidant molecules through innovative technologies in order to reintegrate them as valuable additives in several industrial applications".

For more information: www.polyphenols-site.com

Development of microbial production platforms for plant polyphenols

Prof. Mattheos Koffas from Rensselaer Polytechnic Institute, USA will talk about the "Development of microbial production platforms for plant polyphenols" during the 12th World Congress on Polyphenols Applications: Bonn Polyphenols 2018 which will be held at the University of Bonn, Germany in September 25-28, 2018.

According to Prof. Mattheos Koffas: "In the past 15 years, we have applied metabolic engineering towards the development of robust and efficient microbial production platforms for the production of plant polyphenols. We will present a number of examples where single hosts have been optimized for the production of various flavonoids starting from intermediates such as phenylpropanoic acids and flavanones, using stoichiometric-based modeling and metabolic pathway balancing. We will then present examples of using co-cultures involving such individual strains for the de novo production optimization of various flavonoids from glucose."

For more information: www.polyphenols-site.com

Anthocyanins - Color enhancing strategies

Prof. Reinhold Carle from the University of Hoheneim will present his work about "Anthocyanins – Color enhancing strategies" during the 12th World Congress on Polyphenols Applications: Bonn Polyphenols 2018 which will be held at the University of Bonn, Germany in September 25-28, 2018.

Apart from taste, aroma and texture, color is the most important attribute determining consumer acceptance. Many foods are colored to compensate for color losses due to harsh processing conditions and long-term storage. Furthermore, unappealing visual perception of colorless food is meliorated by the addition of artificial and natural pigments. Owing to their low cost, high stability and superior tinctorial strength, usage of synthetic and animal-based dyes has prevailed over a long period.

Nowadays, due to growing health consciousness, religious rejection, legal restrictions, and the trend toward vegetarian lifestyle, these are progressively replaced by plant pigments. However, the latter are suffering from a limited color palette, poor heat and light stability, sensitivity against high pH, complexing agents, and oxidation. Most frequently, fruit and vegetable concentrates containing anthocyanins and refined preparations thereof are a natural alternative, when water-soluble pigments producing red to bluish tonalities are demanded.

In his presentation, Prof. Carle will highlight the role and importance of color to enhance strategies.

For more information: www.polyphenols-site.com

Activity guided fractionation of red fruit juices to identify α amylase and α glucosidase inhibitors in vitro

Kirsten Berger from University of Kaiserslautern, Kaiserslautern, Germany will talk about "Activity guided fractionation of red fruit juices to identify α amylase and α glucosidase inhibitors in vitro" during the 12th World Congress on Polyphenols Applications: Bonn Polyphenols 2018 which will be held at the University of Bonn, Germany in September 25-28, 2018.

The inhibitory potential of polyphenols against enzymes of the carbohydrate metabolism, such as α‑amylase and α‑glucosidase has been described in some studies. A rich source of polyphenols, especially anthocyanins are red fruits. Our studies examined the in vitro inhibitory activity of extracts and fractions prepared from juices, concentrates, and purees against α‑amylase and α‑glucosidase.

For more information: www.polyphenols-site.com