Cereal Products: Traditional and Innovative Technologies
A.Y. 2018/2019
Learning objectives
To examine the characteristics of cereals and their transformation into raw materials and final products using both "conventional" and innovative technologies. The primary goal of the course is understanding the changes of the main macromolecules present in cereals occurring during the technological processes. The role of these macromolecular modifications on the physical, structural and sensory properties of food is also investigated.
Expected learning outcomes
The course enables students to acquire the following skills: Understanding of the structural characteristics of the sectors examined. Knowledge of the physical and chemical factors that determine the quality of the grain and the criteria used to define classes of commercial quality. Knowledge of the parameters that define the "technological" quality of a raw material. Ability to interpret technical specifications. Knowledge of technological conditions to apply to each phase of a production process in order to induce positive changes on the components for the final product quality, minimizing the negative ones. Knowledge of the parameters that define the yield of a process (milling, bread, pasta).
Lesson period: Second semester
Assessment methods: Esame
Assessment result: voto verbalizzato in trentesimi
Single course
This course cannot be attended as a single course. Please check our list of single courses to find the ones available for enrolment.
Course syllabus and organization
Single session
Responsible
Lesson period
Second semester
Course syllabus
Program RAW MATERIALS: CEREALS The international and national cereal sector: structure, market and the major issues. Morphological, physical and chemical properties of the kernel of major cereal crops. The pseudocereals and immature grains: similarities and differences with cereals. Indices of quality and their evaluation, comparison of conventional and organic farming products. Criteria of (technological, commercial, etc..) classification for wheat and other cereals in Italy and worldwide. The major macromolecules in the grains: chemical, physical and structural features. Genomic and proteomic approaches for the improvement and the definition of the raw material quality. Problems associated to cereal grain storage. The phenomenon of germination: control and prevention. PRODUCTION OF SEMI-FINISHED PRODUCTS The milling sector in Italy. Description of the processes of wheat milling: differences between common and durum wheat milling diagrams. The milling of other cereals (corn, etc..). Assessment of technological/rheological properties of flours. Innovation of first processing processes (hulling, parboiling, etc..). Yield and process optimization. The wet milling to produce starch. The micronization and airclassification of flours. By-products utilization and enhancement: recovery of interesting components for secondary processing and / or for energy purposes industries. FINISHED-PRODUCTS PRODUCTION Pasta. The pasta-making process for dry pasta: flow-sheet, the kneading, extrusion, and drying steps; macroscopic and molecular phenomena related to pasta-makimg. Technological innovations. Mass balance and production yields. The production of fresh pasta: main differences with the technological process for dried pasta. Cooking pasta: phenomena and their intensity, evaluation of cooked pasta quality, by conventional (subjective and instrumental) and advanced methods. Bread and other leavened products: Classification. Dough characteristics: the role of water, flour macromolecular components and other ingredients, improvers and enzymes; mode of/types of kneading. The proofing and the formation of a crumb structure. Cooking: stabilization of the structure. The phenomena related to bread aging (staling), their evaluation and slowing. Product (low glycemic index breads, fiber-enriched breads, etc.) and processing (continuous processes, with use of pre-ferment, frozen bread production, etc..) innovations. Processing of gluten-free cereals (maize, rice, sorghum) and pseudocereals in products such as bread and pasta.
Teaching methods
Slides (printed or electronic copy) presented during the lessons. Other documents (published papers, website links etc.) on specific subjects recommended by the teacher.
AGR/15 - FOOD SCIENCE AND TECHNOLOGY - University credits: 6
Field activity: 8 hours
Laboratories: 8 hours
Lessons: 40 hours
Laboratories: 8 hours
Lessons: 40 hours
Professor:
Marti Alessandra
Professor(s)