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Books > Professional & Technical > Biochemical engineering > General
The book introduces the reader to the concepts of Scientific Molding and Scientific Processing for Injection Molding, geared towards developing a robust, repeatable, and reproducible (3Rs) molding process. The effects of polymer morphology, thermal transitions, drying, and rheology on the injection molding process are explained in detail. The development of a robust molding process is broken down into two sections and is described as the Cosmetic Process and the Dimensional Process. Scientific molding procedures to establish a 3R process are provided. The concept of Design of Experiments (DOEs) for and in injection molding is explained, providing an insight into the cosmetic and dimensional process windows. A plan to release qualified molds into production with troubleshooting tips is also provided. Topics that impact a robust process such as the use of regrind, mold cooling, and venting are also described. Readers will be able to utilize the knowledge gained from the book in their day-to-day operations immediately. The second edition includes a completely new chapter on Quality Concepts, as well as much additional material throughout the book, covering fountain flow, factors affecting post mold shrinkage, and factor selections for DOEs. There are also further explanations on several topics, such as in-mold rheology curves, cavity imbalances, intensification ratios, gate seal studies, holding time optimization of hot runner molds, valve gated molds, and parts with large gates. A troubleshooting guide for common molded defects is also provided. With the purchase of this book, you also receive a free personal access code to download the eBook.
Improvement of injection molding processes remains a topic of great interest in both industry and research institutions. This book introduces the analysis of the molding process from a systems technology point of view. It is divided into four parts: the first part provides general background to introduce the injection molding process, the second covers the control of the process, the third is on the monitoring technology, and the fourth is concerned with the optimization of the process. Most the results within are from real engineering implementations and experimental tests. With the purchase of this book, you also receive a free personal access code to download the eBook.
This textbook covers the fundamentals of physical chemistry, explaining the concepts in an accessible way and guiding the readers in a step-by-step manner. The contents are broadly divided into two sections: the classical physico-chemical topics (thermodynamics, kinetics, electrochemistry, transport, and catalysis), and the fabric of matter and its interactions with radiation. Particular care has been taken in the presentation of the algebraic parts of physico-chemical concepts, so that the readers can easily follow the explanations and re-work relevant discussion and derivations with pen and paper. The book is accompanied by a rich mathematical appendix. Each chapter includes a selection of (numerical) exercises and problems, so that students can practice and apply the learned topics. An appendix with solutions allows for controlling the learning success. Carefully prepared illustrative color images make this book a great support for teaching physical chemistry to undergraduate students.This textbook mainly addresses undergraduate students in life sciences, biochemistry or engineering, offering them a comprehensive and comprehensible introduction for their studies of physical chemistry. It will also appeal to undergraduate chemistry students as an accessible introduction for their physical chemistry studies.
Engineering of polymers is not an easy exercise: with evolving technology, it often involves complex concepts and processes. This book is intended to provide the theoretical essentials: understanding of processes, a basis for the use of design software, and much more. The necessary physical concepts such as continuum mechanics, rheological behavior and measurement methods, and thermal science with its application to heating-cooling problems and implications for flow behavior are analyzed in detail. This knowledge is then applied to key processing methods, including single-screw extrusion and extrusion die flow, twin-screw extrusion and its applications, injection molding, calendering, and processes involving stretching. With many exercises with solutions offered throughout the book to reinforce the concepts presented, and extensive illustrations, this is an essential guide for mastering the art of plastics processing. Practical and didactic, Polymer Processing: Principles and Modeling is intended for engineers and technicians of the profession, as well as for advanced students in Polymer Science and Plastics Engineering. With the purchase of this book, you also receive a free personal access code to download the eBook.
RNA molecules play key roles in all aspects of cellular life, but to do so efficiently, they must work in synergism with proteins. This book addresses how proteins and RNA interact to carry out biological functions such as protein synthesis, regulation of gene expression, genome defense, liquid phase separation and more. The topics addressed in this volume will appeal to researchers in biophysics, biochemistry and structural biology. The book is a useful resource for anybody interested in elucidating the molecular mechanisms and discrete properties of RNA-protein complexes. Included are reviews of key systems such as microRNA and CRISPR/Cas that exemplify how RNA and proteins work together to perform their biological function. Also covered are techniques ranging from single molecule fluorescence and force spectroscopy to crystallography, cryo-EM microscopy, and kinetic modeling.
This concise text contains the essential material covered in a book twice its length, making it easier for the reader to understand and find key principles. The book follows a classical approach, with main chapters on conduction, forced conduction, natural convection and radiation. Unusual in such texts, the author discusses more than one aspect of heat transfer when dealing with practical problems.
Das Buch mit zahlreichen Praxisbeispielen befasst sich mit allen wesentlichen Fragen, die fur die Auslegung von Packungskolonnen bei der Rektifikation, Absorption und Strippung (Desorption) unter Vakuum, im Normal- und Druckbereich bis 100 bar, in der Abluft- und Abwassertechnik von Bedeutung sind. Es wird ein einheitliches, fur beliebige Einbauten geltendes Modell vorgestellt, mit dem die Flutpunktgeschwindigkeit, der Flussigkeitsinhalt und der Druckverlust im gesamten Belastungsbereich fur regellose Fullkorper, geordnete Fullkorperschichten, fur Rohrkolonnen und fur strukturierte Packungen mit unterschiedlicher Neigung der Stromungskanale vorausberechnet werden kann. Des Weiteren werden Berechnungsunterlagen fur ca. 200 Fullkorper und Packungen zusammengestellt. Die zahlreichen Rechenbeispiele - insbesondere fur strukturierte Packungen - erleichtern die Anwendung der abgeleiteten Beziehungen."
Dieses Buch beschaftigt sich mit der Bilanzierung von Stoff- und Energiestroemen in verfahrenstechnischen Systemen und soll mithelfen, den grossen Sprung von der Formulierung der Erhaltungssatze fur Energie und Masse zur komplexen Aufgabenstellung des Technikers beim Erstellen und Loesen von Bilanzen ganzer Industrieanlagen zu uberwinden. Der Schwerpunkt der Ausfuhrungen liegt bei der handischen Durchrechnung der Systeme ohne Ruckgriff auf EDV-gestutzte Methoden.
This is the second volume of a two-volume work devoted to probability theory in physical chemistry, and engineering. Rather than dealing explicitly with the idea of an ongoing random walk, with each chaotic step taking place at fixed time intervals, this volume addresses random environments-- models in which the disorder is frozen in space. It begins with an introduction to the geometry of random environments, emphasizing Bernoulli percolation models. The scope of the investigation then widens as we ask how structural disorder affects the transport process. The final chapters confront the interplay of two different forms of randomness; spatial randomness frozen into the environment and temporal randomness associated with the choices for next steps made by a random walker. The book ends with a discussion of "the ant in the labyrinth" problems and an extensive bibliography that, along with the rest of the material, will be of value to researchers in physics, mathematics, and chemical engineering.
Das eingefuhrte Standardwerk erscheint in der 3. Auflage in voellig neubearbeiteter und erweiterter Ausgabe. Es befasst sich mit allen wichtigen Einzelelementen zur Konstruktion verfahrens- und chemietechnischer Apparate und Anlagen. Entsprechend ihrer Bedeutung in der industriellen Anwendung behandeln die Autoren Details von Warmeaustauschern, Ruhrbehaltern, Trennkolonnen, Behaltern, Silos und Trocknern, jeweils unter dem Aspekt verschiedener Werkstoffe und Konstruktionsvarianten. Die besondere Anordnung von Bildern und Tabellen ermoeglicht den Industriepraktikern einen schnellen Zugriff auf das gerade benoetigte Element. Der Student des konstruktiven Maschinenbaus erhalt ein Nachschlagewerk zur Apparate- und Anlagengestaltung.
Nach einem halben Jahrhundert fortschreitender Entwicklung gibt dieses Werk einen umfassenden Uberblick uber den wissenschaftlich-technischen Stand aller wesentlichen Bereiche der modernen Lebensmittelverpackung. Wichtige Aspekte sind Wirtschaftlichkeit, Kosten und Energie. Schwerpunkte bilden Verpackungsfunktionen zum Schutz der verpackten Guter sowie Verbraucher und Umwelt, fur Logistik und Verteilung und zur Erfullung gesetzlicher Auflagen. Die Entwicklung auf dem Gebiet Verpackung und Umwelt wird kritisch behandelt. Als Leiter der Forschung und Vorentwicklung eines grossen international tatigen Unternehmens und Dozent fur Verpackung fur angehende Lebensmitteltechnologen an der Universitat Stuttgart-Hohenheim hat der Autor diesen Fortschritt selbst mitgepragt. Seinen enormen Erfahrungsschatz hat er in diesem Buch niedergelegt. Es stellt damit ein Basiswerk der neuzeitlichen Lebensmittelverpackung dar."
In diesem Buch fassen die Autoren, die teilweise drei Jahrzehnte Ingenieurstudenten unterrichteten, ihr chemisches Fachwissen in verstandlicher Form zusammen. Aus verschiedenen Vorlesungen wurden die fur alle ingenieurwissenschaftlichen Fachrichtungen bedeutenden Themenbereiche neu bearbeitet und so erganzt, dass sie auch ohne begleitende Vorlesung verstanden werden konnen. Die Themen Werkstoffkunde, Halbleiter, Wasserchemie, Elektrochemie, Umweltschutz und Energie sind u.a. inhaltliche Schwerpunkte. Wichtige Industrieprodukte und -bereiche wie Schwefelsaure, Luftflussigung, Ethylen und Erdol, Kalk, Ammoniak, Natronlauge und Chlor sind als Beispiele chemisch-technischer Prozesse mit einbezogen. Ubungen mit Losungen dienen der Vertiefung des erworbenen Wissens. "
Fur fortgeschrittene Studenten der Chemie und der Chemischen Verfahrenstechnik sind gute Kenntnisse der Kombinatorischen Chemie heute unverzichtbar. Ihnen und den Studenten angrenzender Bereiche, wie Biochemie, Biologie und Biomedizin, bietet das Lehrbuch einen klaren, in die Tiefe gehenden UEberblick. Fur erfahrene Praktiker in Forschung und Industrie ist es ein essentielles Nachschlagewerk, das durch seinen umfangreichen, hochaktuellen Referenzteil ausfuhrliche weitere Studien ermoeglicht.
Die etwa 100 wichtigsten Begriffe der Warmeubertragung werden
erlautert und in Beispielen erklart. Die wichtigsten
Berechnungsformeln werden aufgefuhrt, die wichtigsten Definitionen
zusammengestellt.
In today's world, it has become necessary to shift towards a more eco-friendly and sustainable approach in the industrial field to reduce pollution and stop toxic chemicals from entering the environment. Green chemistry is an emerging concept that can be utilized to assist with these environmental issues. To ensure this concept is employed to its full potential, further study on the best practices and challenges of implementation are required. Green Chemistry for the Development of Eco-Friendly Products discusses the main objective of green chemistry and how it can redefine and modify manufacturing processes and products in order to decrease hazards to human health. The book also considers key concepts of green chemistry, such as the need to make better use of available resources for the development of a chemical process. Covering critical topics such as bioplastics, waste, and hydrogen law, this reference work is ideal for chemists, business owners, environmentalists, policymakers, academicians, scholars, researchers, practitioners, instructors, and students.
Um wettbewerbsf hig zu bleiben, m ssen Unternehmen st ndig die Qualit t ihrer Produkte und Prozesse verbessern. Die Voraussetzung ist eine systematische Aufnahme und Analyse von qualit tsrelevanten Daten. Das Buch stellt erstmals die f r die Produktion und Verfahrenstechnik geeigneten Methoden zusammenfassend dar. Mit Beispielen, Aufgaben und L sungen ist es die ideale Arbeitshilfe f r Praxis und Selbststudium. |
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