Katrin Kopf - Academia.edu (original) (raw)
Papers by Katrin Kopf
Agrarforschung Schweiz, 2018
Frontiers in Nutrition
With the increasing availability of plant-based protein products that should serve as alternative... more With the increasing availability of plant-based protein products that should serve as alternatives to animal-based protein products, it is necessary to develop not only environmentally friendly but also nutritious foods. Especially the protein content and quality are of concern in these products. The algorithm of NutriOpt was developed using linear programming to support the development of food products with a balanced amino acid profile while considering digestibility. The current version contains a database with 84 plant protein sources from different food groups (legumes, cereals, nuts, seeds) and with different grades of purification (flours, concentrates, isolates) from which NutriOpt can create mixtures with high protein quality while complying with constraints such as protein content, number of ingredients, and weight of the mixture. The program was tested through different case studies based on commercial plant-based drinks. It was possible to obtain formulations with a Prot...
Franziska Götze, Dr. agr., ist seit 2016 als wissenschaftliche Mitarbeiterin für Konsumentenverha... more Franziska Götze, Dr. agr., ist seit 2016 als wissenschaftliche Mitarbeiterin für Konsumentenverhalten an der BFH-HAFL tätig. Von 2013 bis 2016 arbeitete sie in der Forschungsgruppe Sozioökonomie von Agroscope. Studium der Agrar wissenschaften mit Spezialisierung Wirtschafts-und Sozial wissenschaften des Landbaus an der Georg-August-Universität Göttingen und der Agrarökonomie an der Humboldt-Universität zu Berlin. Promotion 2019 an der Rheini schen Friedrich-Wilhelms-Universität Bonn. Forschungsprojekte und Publikationen u.a. zu folgenden Themen: Nachfrage nach Bio-Lebensmitteln, Fleisch-und Fischkonsum und Fleischalternativen, nachhaltige Ernährungssysteme.
Franziska Götze, Dr. agr., ist seit 2016 als wissenschaftliche Mitarbeiterin für Konsumentenverha... more Franziska Götze, Dr. agr., ist seit 2016 als wissenschaftliche Mitarbeiterin für Konsumentenverhalten an der BFH-HAFL tätig. Von 2013 bis 2016 arbeitete sie in der Forschungsgruppe Sozioökonomie von Agroscope. Studium der Agrar wissenschaften mit Spezialisierung Wirtschafts-und Sozial wissenschaften des Landbaus an der Georg-August-Universität Göttingen und der Agrarökonomie an der Humboldt-Universität zu Berlin. Promotion 2019 an der Rheini schen Friedrich-Wilhelms-Universität Bonn. Forschungsprojekte und Publikationen u.a. zu folgenden Themen: Nachfrage nach Bio-Lebensmitteln, Fleisch-und Fischkonsum und Fleischalternativen, nachhaltige Ernährungssysteme.
Today, the number of plant-based drinks in the retailer shelves is augmenting. They are directly ... more Today, the number of plant-based drinks in the retailer shelves is augmenting. They are directly based beside milk in similar packaging and even called colloquial «… milk». Their market raised 19% from 2011-2016 in Switzerland, whereas the bovine milk demand decreased -6% due to different reasons. This trend makes it necessary to investigate in detail which products are on the market, what they are composed of and the implications regarding their nutritional value. Method: The main supermarket chains in Switzerland sell 45 non-dairy plant-based beverages that were analyzed as to their composition (information from the label and nutrient databases) and nutrient content per recommended serving size. This information was correlated to the recommended dietary allowances published by the Swiss Society for Nutrition (SSN), for adults (25-51), children (4-7 years) and toddlers (1-3 years). The focus was placed on the protein content and amino acid composition of the beverages which is of great importance for different physiological functions. Results: Replacing cow’s milk with non-dairy plant-based beverages leads to a reduced intake of proteins, calcium, certain vitamins and minerals and to an increased intake of added salt. Discussion: A substitution of cow`s milk should be made with precaution and nutrient deficiencies balanced with other food sources. These results are important for product development in the future
The current project NutriOpt offers digital solutions for nutrient optimization in product develo... more The current project NutriOpt offers digital solutions for nutrient optimization in product development. We establish product databases containing plants, plant-based powders, and drinks with decisive information about nutrient composition, bioavailability, antinutrients or inhibitory effects. A mathematical model for mixed integer problems allows to combine different products that are approaching a target vector. The target vector is the recommended nutrient composition for a specific target group. It is possible to select different nutrients or to give them more weight. The models were already applied for plant-based protein alternatives to ensure that the protein requirements for amino acids from WHO are guaranteed. In the future, additional effects of processing will be included to be able to combine products for increased nutritive value. Finally, we will like to develop a user-friendly WEB-Software for the operations
Das Interesse an einer besseren Verwertung der Molke ist weltweit stark gestiegen - aufgrund des ... more Das Interesse an einer besseren Verwertung der Molke ist weltweit stark gestiegen - aufgrund des steigenden Bewusstseins für einen nachhaltigen Umgang mit Lebensmitteln, der neuen technologischen Möglichkeiten der Membrantrenntechnik und des ökonomischen Potenzials. Internationale Konzerne arbeiten intensiv daran, Molke nicht nur in Lebensmittel zu integrieren, sondern die funktionellen Eigenschaften von Molkefraktionen gezielt zu nutzen oder zu verändern. Produkte sind bereits auf dem Markt. Wie stellt sich die Situation in der Schweiz dar und wie gross ist das Verwertungspotenzial von Molke in der menschlichen Ernährung
«Du bist, was du isst.» Immer mehr Menschen interessieren sich für eine gesunde Ernährung. Die mu... more «Du bist, was du isst.» Immer mehr Menschen interessieren sich für eine gesunde Ernährung. Die muss auch nicht teurer sein, wie sich in einer Studie der BFH-HAFL herausgestellt hat. Spezielle Ernährungsformen wie Veganismus nehmen zu und die Bedürfnisse nach Produkten für Personen mit Lebensmittelunverträglichkeiten steigen. Ein Trend in Richtung personalisierter Lebensmittel oder Lebensmittel für bestimmte Zielgruppen ist deutlich wahrzunehmen
Veränderte Lebensgewohnheiten und neue Lebensstile der Konsumentinnen und Konsumenten haben einen... more Veränderte Lebensgewohnheiten und neue Lebensstile der Konsumentinnen und Konsumenten haben einen immer stärker werdenden Einfluss auf die Lebensmittelindustrie. Die interdisziplinäre Forschung an der HAFL bemüht sich daher, die Bedürfnisse der Verbrauchergemeinschaft zu verstehen und in neue Konzepte zu übersetzen
Introduction: The degree of crystallization of whey determines its process behaviour, since amorp... more Introduction: The degree of crystallization of whey determines its process behaviour, since amorphous whey for example sticks to spray dryer walls. Further, whey composition affects the degree of crystallization and sesequently powder functionality. In this study, the effect of different seeding lactose crystals at different incubation temperatures were examined. Additionally, the impact of riboflavin on lactose crystallization was investigated. Methods: Whey of the Emmentaler production was concentrated by vacuum evaporation. Crystallization was performed at laboratory scale, followed by spray drying done with the Büchi Mini Spray dryer B-290. The degree of crystallinity in the concentrate was determined before spray drying and particle size, water activity, and solubility of the powder analyzed. Results: Without seeding, the pre-crystallization of lactose was significantly delayed. Seeding lactoses (GranuLac®70 and GranuLac®400) with different crystal sizes did not show a significant difference in the degree of crystallization. Riboflavin hindered crystallization. Crystallization at 15°C or 10°C did only lead to small changes of crystallization yield. Powder functionality parameters like solubility are affected by the different treatments. Conclusion: The crystallization of lactose in whey is affected by riboflavin, temperature and the type of seeding lactose. We established a stable process for whey powder processing that can be used to determine effects of whey variability
Nutrients, 2022
To underline the importance of protein quality in plant-based diets, we estimated the protein qua... more To underline the importance of protein quality in plant-based diets, we estimated the protein quality of different exclusively plant-protein-based day menus that are based on the “planetary health diet” developed by the EAT-Lancet Commission. PDCAAS and DIAAS were used to estimate the protein quality (PQ) and fulfilling of the amino acid recommendation for adults in vegan daily menus based on the planetary health diet: 2 days with only low-quality (LQ) protein sources and 2 days with low + high-quality (HQ) protein sources. The protein quality of Day 1LQ (DIAAS 76, PDCAAS 88) was increased by the addition of high-quality protein sources (HQPS): Day 1HQ (DIAAS 94, PDCAAS 98). Day 2LQ had a low PQ (DIAAS 71, PDCAAS 74), but when HQPS were used (Day 2HQ), the PQ increased (DIAAS 83, PDCAAS 88). Scenarios (day 1HQ, day 1LQ, and day 2 HQ) were classified as of good PQ. However, day 1LQ had a low protein quality. Consuming HQPS in a vegan diet can help to fulfil the recommendation of esse...
Medical & Clinical Research
Background: The lack of sun plays a major role in vitamin D deficiency, particularly among vulner... more Background: The lack of sun plays a major role in vitamin D deficiency, particularly among vulnerable groups, including migrants and women. Vitamin D and calcium are crucial nutrients for optimal bone health, heart function and muscle contraction. Recent studies suggest that the two micronutrients alone do not appear to be as beneficial as when their intake is coupled with vitamin K. Therefore, it is necessary to prevent their deficiencies. To this date, we observe a deficit of culturally sensitive methods for assessing dietary intake. The aim of this study was to estimate the dietary vitamin D, vitamin K and calcium intake among Portuguese women of childbearing age living in Switzerland. Methodology: A food frequency questionnaire was developed and administrated. A comparative method, a 24-hour dietary recall, was applied twice, over two non-consecutive days. The same methodology was applied to and compared with two control groups: Portuguese women living in Portugal and Swiss wome...
Das wachsende Angebot von pflanzlichen Getranken, die von den Konsumenten als Milchersatzgetranke... more Das wachsende Angebot von pflanzlichen Getranken, die von den Konsumenten als Milchersatzgetranke angesehen werden, macht eine vergleichende Betrachtung der Nahrstoffe und eine Evaluation der ernahrungsphysiologischen Konsequenzen eines Ersatzes von Kuhmilch notwendig. Dabei muss ein ganzheitlicher Ansatz angewendet werden, denn die gesamte Wertschopfungskette hat einen Einfluss auf die Nahrwerte und die physiologischen Effekte. Die Auswahl der Pflanzensorte beim Anbau, die klimatischen Bedingungen oder die Futterung der Wiederkauer zum Beispiel konnen die Nahrstoffzusammensetzung der Getranke stark beeinflussen. Im Beitrag werden reprasentative Nahrstoffgehalte von in der Schweiz kommerziell erhaltlichen pflanzenbasierten Getranken sowie Ziegen- und Schafmilch mit Kuhmilch verglichen.
Arbor-ciencia Pensamiento Y Cultura, 2018
Soll die Eigenversorgung an pflanzlichem Protein fur die menschliche Ernahrung ausgebaut werden, ... more Soll die Eigenversorgung an pflanzlichem Protein fur die menschliche Ernahrung ausgebaut werden, bedarf es einer moglichst gesamthaften Betrachtung. In dieser Studie wird die Situation in der Schweiz systemisch analysiert. Es wird aufgezeigt, welche proteinreichen Pflanzen sich besonders fur einen nachhaltigen und okologischen Anbau eignen, welches ernahrungsphysiologische Potenzial sie mitbringen und welche Prozessschritte notwendig sind, um sie zu Proteinkonzentraten und -isolaten aufzuarbeiten, die sich wiederum zur Herstellung von Fleischersatzprodukten eignen.
Although the composition of the human blood metabolome is influenced both by the health status of... more Although the composition of the human blood metabolome is influenced both by the health status of the organism and its dietary behavior, the interaction between these two factors has been poorly characterized. This study makes use of a previously published randomized controlled crossover acute intervention to investigate whether the blood metabolome of 15 healthy normal weight (NW) and 17 obese (OB) men having ingested three doses (500, 1000, 1500 kcal) of a high-fat (HF) meal can be used to identify metabolites differentiating these two groups. Among the 1024 features showing a postprandial response, measured between 0 h and 6 h, in the NW group, 135 were dose-dependent. Among these 135 features, 52 had fasting values that were significantly different between NW and OB men, and, strikingly, they were all significantly higher in OB men. A subset of the 52 features was identified as amino acids (e.g., branched-chain amino acids) and amino acid derivatives. As the fasting concentratio...
Agrarforschung Schweiz, 2018
Frontiers in Nutrition
With the increasing availability of plant-based protein products that should serve as alternative... more With the increasing availability of plant-based protein products that should serve as alternatives to animal-based protein products, it is necessary to develop not only environmentally friendly but also nutritious foods. Especially the protein content and quality are of concern in these products. The algorithm of NutriOpt was developed using linear programming to support the development of food products with a balanced amino acid profile while considering digestibility. The current version contains a database with 84 plant protein sources from different food groups (legumes, cereals, nuts, seeds) and with different grades of purification (flours, concentrates, isolates) from which NutriOpt can create mixtures with high protein quality while complying with constraints such as protein content, number of ingredients, and weight of the mixture. The program was tested through different case studies based on commercial plant-based drinks. It was possible to obtain formulations with a Prot...
Franziska Götze, Dr. agr., ist seit 2016 als wissenschaftliche Mitarbeiterin für Konsumentenverha... more Franziska Götze, Dr. agr., ist seit 2016 als wissenschaftliche Mitarbeiterin für Konsumentenverhalten an der BFH-HAFL tätig. Von 2013 bis 2016 arbeitete sie in der Forschungsgruppe Sozioökonomie von Agroscope. Studium der Agrar wissenschaften mit Spezialisierung Wirtschafts-und Sozial wissenschaften des Landbaus an der Georg-August-Universität Göttingen und der Agrarökonomie an der Humboldt-Universität zu Berlin. Promotion 2019 an der Rheini schen Friedrich-Wilhelms-Universität Bonn. Forschungsprojekte und Publikationen u.a. zu folgenden Themen: Nachfrage nach Bio-Lebensmitteln, Fleisch-und Fischkonsum und Fleischalternativen, nachhaltige Ernährungssysteme.
Franziska Götze, Dr. agr., ist seit 2016 als wissenschaftliche Mitarbeiterin für Konsumentenverha... more Franziska Götze, Dr. agr., ist seit 2016 als wissenschaftliche Mitarbeiterin für Konsumentenverhalten an der BFH-HAFL tätig. Von 2013 bis 2016 arbeitete sie in der Forschungsgruppe Sozioökonomie von Agroscope. Studium der Agrar wissenschaften mit Spezialisierung Wirtschafts-und Sozial wissenschaften des Landbaus an der Georg-August-Universität Göttingen und der Agrarökonomie an der Humboldt-Universität zu Berlin. Promotion 2019 an der Rheini schen Friedrich-Wilhelms-Universität Bonn. Forschungsprojekte und Publikationen u.a. zu folgenden Themen: Nachfrage nach Bio-Lebensmitteln, Fleisch-und Fischkonsum und Fleischalternativen, nachhaltige Ernährungssysteme.
Today, the number of plant-based drinks in the retailer shelves is augmenting. They are directly ... more Today, the number of plant-based drinks in the retailer shelves is augmenting. They are directly based beside milk in similar packaging and even called colloquial «… milk». Their market raised 19% from 2011-2016 in Switzerland, whereas the bovine milk demand decreased -6% due to different reasons. This trend makes it necessary to investigate in detail which products are on the market, what they are composed of and the implications regarding their nutritional value. Method: The main supermarket chains in Switzerland sell 45 non-dairy plant-based beverages that were analyzed as to their composition (information from the label and nutrient databases) and nutrient content per recommended serving size. This information was correlated to the recommended dietary allowances published by the Swiss Society for Nutrition (SSN), for adults (25-51), children (4-7 years) and toddlers (1-3 years). The focus was placed on the protein content and amino acid composition of the beverages which is of great importance for different physiological functions. Results: Replacing cow’s milk with non-dairy plant-based beverages leads to a reduced intake of proteins, calcium, certain vitamins and minerals and to an increased intake of added salt. Discussion: A substitution of cow`s milk should be made with precaution and nutrient deficiencies balanced with other food sources. These results are important for product development in the future
The current project NutriOpt offers digital solutions for nutrient optimization in product develo... more The current project NutriOpt offers digital solutions for nutrient optimization in product development. We establish product databases containing plants, plant-based powders, and drinks with decisive information about nutrient composition, bioavailability, antinutrients or inhibitory effects. A mathematical model for mixed integer problems allows to combine different products that are approaching a target vector. The target vector is the recommended nutrient composition for a specific target group. It is possible to select different nutrients or to give them more weight. The models were already applied for plant-based protein alternatives to ensure that the protein requirements for amino acids from WHO are guaranteed. In the future, additional effects of processing will be included to be able to combine products for increased nutritive value. Finally, we will like to develop a user-friendly WEB-Software for the operations
Das Interesse an einer besseren Verwertung der Molke ist weltweit stark gestiegen - aufgrund des ... more Das Interesse an einer besseren Verwertung der Molke ist weltweit stark gestiegen - aufgrund des steigenden Bewusstseins für einen nachhaltigen Umgang mit Lebensmitteln, der neuen technologischen Möglichkeiten der Membrantrenntechnik und des ökonomischen Potenzials. Internationale Konzerne arbeiten intensiv daran, Molke nicht nur in Lebensmittel zu integrieren, sondern die funktionellen Eigenschaften von Molkefraktionen gezielt zu nutzen oder zu verändern. Produkte sind bereits auf dem Markt. Wie stellt sich die Situation in der Schweiz dar und wie gross ist das Verwertungspotenzial von Molke in der menschlichen Ernährung
«Du bist, was du isst.» Immer mehr Menschen interessieren sich für eine gesunde Ernährung. Die mu... more «Du bist, was du isst.» Immer mehr Menschen interessieren sich für eine gesunde Ernährung. Die muss auch nicht teurer sein, wie sich in einer Studie der BFH-HAFL herausgestellt hat. Spezielle Ernährungsformen wie Veganismus nehmen zu und die Bedürfnisse nach Produkten für Personen mit Lebensmittelunverträglichkeiten steigen. Ein Trend in Richtung personalisierter Lebensmittel oder Lebensmittel für bestimmte Zielgruppen ist deutlich wahrzunehmen
Veränderte Lebensgewohnheiten und neue Lebensstile der Konsumentinnen und Konsumenten haben einen... more Veränderte Lebensgewohnheiten und neue Lebensstile der Konsumentinnen und Konsumenten haben einen immer stärker werdenden Einfluss auf die Lebensmittelindustrie. Die interdisziplinäre Forschung an der HAFL bemüht sich daher, die Bedürfnisse der Verbrauchergemeinschaft zu verstehen und in neue Konzepte zu übersetzen
Introduction: The degree of crystallization of whey determines its process behaviour, since amorp... more Introduction: The degree of crystallization of whey determines its process behaviour, since amorphous whey for example sticks to spray dryer walls. Further, whey composition affects the degree of crystallization and sesequently powder functionality. In this study, the effect of different seeding lactose crystals at different incubation temperatures were examined. Additionally, the impact of riboflavin on lactose crystallization was investigated. Methods: Whey of the Emmentaler production was concentrated by vacuum evaporation. Crystallization was performed at laboratory scale, followed by spray drying done with the Büchi Mini Spray dryer B-290. The degree of crystallinity in the concentrate was determined before spray drying and particle size, water activity, and solubility of the powder analyzed. Results: Without seeding, the pre-crystallization of lactose was significantly delayed. Seeding lactoses (GranuLac®70 and GranuLac®400) with different crystal sizes did not show a significant difference in the degree of crystallization. Riboflavin hindered crystallization. Crystallization at 15°C or 10°C did only lead to small changes of crystallization yield. Powder functionality parameters like solubility are affected by the different treatments. Conclusion: The crystallization of lactose in whey is affected by riboflavin, temperature and the type of seeding lactose. We established a stable process for whey powder processing that can be used to determine effects of whey variability
Nutrients, 2022
To underline the importance of protein quality in plant-based diets, we estimated the protein qua... more To underline the importance of protein quality in plant-based diets, we estimated the protein quality of different exclusively plant-protein-based day menus that are based on the “planetary health diet” developed by the EAT-Lancet Commission. PDCAAS and DIAAS were used to estimate the protein quality (PQ) and fulfilling of the amino acid recommendation for adults in vegan daily menus based on the planetary health diet: 2 days with only low-quality (LQ) protein sources and 2 days with low + high-quality (HQ) protein sources. The protein quality of Day 1LQ (DIAAS 76, PDCAAS 88) was increased by the addition of high-quality protein sources (HQPS): Day 1HQ (DIAAS 94, PDCAAS 98). Day 2LQ had a low PQ (DIAAS 71, PDCAAS 74), but when HQPS were used (Day 2HQ), the PQ increased (DIAAS 83, PDCAAS 88). Scenarios (day 1HQ, day 1LQ, and day 2 HQ) were classified as of good PQ. However, day 1LQ had a low protein quality. Consuming HQPS in a vegan diet can help to fulfil the recommendation of esse...
Medical & Clinical Research
Background: The lack of sun plays a major role in vitamin D deficiency, particularly among vulner... more Background: The lack of sun plays a major role in vitamin D deficiency, particularly among vulnerable groups, including migrants and women. Vitamin D and calcium are crucial nutrients for optimal bone health, heart function and muscle contraction. Recent studies suggest that the two micronutrients alone do not appear to be as beneficial as when their intake is coupled with vitamin K. Therefore, it is necessary to prevent their deficiencies. To this date, we observe a deficit of culturally sensitive methods for assessing dietary intake. The aim of this study was to estimate the dietary vitamin D, vitamin K and calcium intake among Portuguese women of childbearing age living in Switzerland. Methodology: A food frequency questionnaire was developed and administrated. A comparative method, a 24-hour dietary recall, was applied twice, over two non-consecutive days. The same methodology was applied to and compared with two control groups: Portuguese women living in Portugal and Swiss wome...
Das wachsende Angebot von pflanzlichen Getranken, die von den Konsumenten als Milchersatzgetranke... more Das wachsende Angebot von pflanzlichen Getranken, die von den Konsumenten als Milchersatzgetranke angesehen werden, macht eine vergleichende Betrachtung der Nahrstoffe und eine Evaluation der ernahrungsphysiologischen Konsequenzen eines Ersatzes von Kuhmilch notwendig. Dabei muss ein ganzheitlicher Ansatz angewendet werden, denn die gesamte Wertschopfungskette hat einen Einfluss auf die Nahrwerte und die physiologischen Effekte. Die Auswahl der Pflanzensorte beim Anbau, die klimatischen Bedingungen oder die Futterung der Wiederkauer zum Beispiel konnen die Nahrstoffzusammensetzung der Getranke stark beeinflussen. Im Beitrag werden reprasentative Nahrstoffgehalte von in der Schweiz kommerziell erhaltlichen pflanzenbasierten Getranken sowie Ziegen- und Schafmilch mit Kuhmilch verglichen.
Arbor-ciencia Pensamiento Y Cultura, 2018
Soll die Eigenversorgung an pflanzlichem Protein fur die menschliche Ernahrung ausgebaut werden, ... more Soll die Eigenversorgung an pflanzlichem Protein fur die menschliche Ernahrung ausgebaut werden, bedarf es einer moglichst gesamthaften Betrachtung. In dieser Studie wird die Situation in der Schweiz systemisch analysiert. Es wird aufgezeigt, welche proteinreichen Pflanzen sich besonders fur einen nachhaltigen und okologischen Anbau eignen, welches ernahrungsphysiologische Potenzial sie mitbringen und welche Prozessschritte notwendig sind, um sie zu Proteinkonzentraten und -isolaten aufzuarbeiten, die sich wiederum zur Herstellung von Fleischersatzprodukten eignen.
Although the composition of the human blood metabolome is influenced both by the health status of... more Although the composition of the human blood metabolome is influenced both by the health status of the organism and its dietary behavior, the interaction between these two factors has been poorly characterized. This study makes use of a previously published randomized controlled crossover acute intervention to investigate whether the blood metabolome of 15 healthy normal weight (NW) and 17 obese (OB) men having ingested three doses (500, 1000, 1500 kcal) of a high-fat (HF) meal can be used to identify metabolites differentiating these two groups. Among the 1024 features showing a postprandial response, measured between 0 h and 6 h, in the NW group, 135 were dose-dependent. Among these 135 features, 52 had fasting values that were significantly different between NW and OB men, and, strikingly, they were all significantly higher in OB men. A subset of the 52 features was identified as amino acids (e.g., branched-chain amino acids) and amino acid derivatives. As the fasting concentratio...