Freeze drying process

Graphene aerogel (GA) was synthesized by chemical reduction of graphene oxide (GO) using ethylene diamine as a reducing agent, which was then followed by a freeze-drying process. In this work, we produced GA by hydrothermal process followed by freeze-drying. The produced adsorbent was then deployed to study the TC adsorption process.

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In ebook "Pore structure in food: Simulation, measurement and applications" the pore structure of foods directly affects the success of such food processes as drying, puffing, freeze-drying, and rehydration. Consequently, the pore structure of foods determines what types of food processes will work best with a particular food. This Brief will first discuss in depth the need to correctly measure the pore structure of foods and then will identify and describe in detail the current methods available to measure food porosity. Finally, it will review the applications of these various methods. ​

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In ebook "Experiments in unit operations and processing of foods" chemical engineering and related fields, a unit operation is a basic step in a process. For example in milk processing, homogenization, pasteurization, chilling, and packaging are each unit operations which are connected to create the overall process. A process may have many unit operations to obtain the desired product. The book will cover many different unit operations as they apply to food processing.

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Ebook "Solving problems in food engineering" is a step by step workbook intended to enhance students' understanding of complicated concepts and to help them practice solving food engineering problems. The book covers problems in fluid flow, heat transfer, mass transfer, and the most common unit operations that have applications in food processing, such as thermal processing, cooling and freezing, evaporation, psychrometrics and drying. Included are theoretical questions in the form of true or false, solved problems, semi-solved problems, and problems solved using a computer.

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Ebook "Vacuum drying for extending food shelf-life" is based on scientific articles published from the 1940s to the present, and is divided into five chapters: the first is an introduction to the use of vacuum in food processes; the second, third and fourth comprise advances on the most relevant vacuum drying techniques applied to food, namely conventional vacuum drying, freeze-drying and microwave-vacuum drying and the fifth deals with studies where vacuum drying techniques were compared to other drying techniques in terms of quality and/or engineering aspects.

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Part 2 book "Handbook of food process design" includes content: Refrigeration, air conditioning and cold storage; chilling, freezing and thawing process design; thermal evaporator design 18 food processing and control by air jet impingement; heat pump design for food processing; freeze drying process design; crystallization process design,... and other contents.

538p oursky10 07-12-2023 6 4   Download

Mahewu is a traditional cool non-alcoholic fermented beverage known among African countries; generally made from cereals but also it can be made from tubes. The raw material (cereals and tubes) is spontaneity fermented at room temperature by acid lactic bacteria, the fermentation process is considered to increase the nutritional content of mahewu.

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Freeze drying process is the drying method which preserves the original biological characteristics of products with high quality compared to other drying methods, providing high efficiency during usage. Natto is known as a product extracted from soybeans fermented by Bacillus Natto bacteria.

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The research work is modeling the freezing process of turmeric starch to determine the rate of freezing water inside freezing turmeric starch for using in the freeze drying. Results obtained are used to calculate, design, make and control the refrigeration system as well as the freeze drying, they are applied to the actual production.

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Freeze drying is one of the most advanced drying technologies for food processing and preserving using temperature under 0oC or under the freezing point, and pressure of drying chamber environment under 4.58mmHg to process foods. This method helps to maintain the initial quality of proteins, lipids, carbohydrates, vitamins, bioactive substances and sensory activities.

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Several bone implants are applied in clinical practice, but none meets the requirements of an ideal implant. Platelet-rich plasma (PRP) is an easy and inexpensive way to obtain growth factors in physiologic proportions that might favour the regenerative process.

11p viannito2711 20-04-2021 9 1   Download

Post-harvest processing and value addition is the most important aspect related to all the food products. Processing of agricultural commodities means converting the raw food material in to consumer acceptable form with increased shelf life and maintained nutritional quality. It can be achieved through various conventional food processing methods like drying, dehydration, evaporation, extrusion, freezing etc. The main lacunae with these conventional methods are loss of colour, flavour, vitamins and other nutrients due to higher temperature and longer processing time.

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The study was undertaken with an objective to evaluate the effect of drying techniques on functional properties and chemical composition of okara (soybean processing byproduct). The predefined drying techniques like oven, freeze and solar tunnel drying were followed and their effect on the physico-chemical properties of okara were studied. Fresh okara was extracted, processed (dried) and powdered from variety PS-1347.

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Drying of fruits is an economical and an effective preservation method practiced since ages by ancestors throughout the world. Strawberry is a seasonal fruit and is available in abundance during particular season of the year. It is a very delicate fruit with low shelf-life, hence needs proper preservation techniques. Preservation of strawberry through sun drying techniques results in poor quality and product contamination. Energy consumption and quality of dried product are critical parameters in the selection of drying process.

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Freeze-thaw convection drying is an innovative technique that could dramatically reduce processing times for many foods. Optimization of the process for the production of dehydrated garlic slices by using freeze-thaw convective drying technique was performed by using Box-Behnken Design.

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Application of Drying Techniques in Food Processing Drying is one of the oldest preservation processes available to the mankind, on that we can track since prehistoric times. In today food market dried foods play an important role in the food supply chain. As for fruits and vegetables it can be estimated that they constitute about 1% of the total drying in the food industry, by large being the grains the most important. The main feature of this process consists on lowering the water content in order to avoid or slow down food spoilage by microorganism.

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A great number of patients have difficulty swallowing or needle fear. Therefore, buccal and orodispersible dosage forms (ODFs) represent an important strategy to enhance patient compliance. Besides not requiring water intake, swallowing or needles, these dosage forms allow drug release modulation. ODFs include oral lyophilizates or wafers, which present even faster disintegration than its compressed counterparts. Lyophilization can also produce buccal wafers that adhere to mucosa for sustained drug release.

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Food engineering is usually a difficult discipline for food science students because they are more used to qualitative rather than to quantitative descriptions of food processing operations. Food engineering requires understanding of the basic principles of fluid flow, heat transfer, and mass transfer phenomena and application of these principles to unit operations which are frequently used in food processing, e.g., evaporation, drying, thermal processing, cooling and freezing, etc. The most difficult part of a course in food engineering is often considered the solution of problems.

297p thanhthao567 20-12-2011 143 35   Download