Saturday, 14 March 2015
Wednesday, 25 February 2015
Furfural berasal dari kata latin furfur yang mempunyai arti
kulit padi. Furfural pertama kali ditemukan pada
tahun 1832 oleh Johann Wolfgang Dobereiner dan merupakan suatu senyawa yang
mengandung cincin furan dengan satu atom
O, furfural sejenis minyak yang tidak berwarna dengan bau seperti almond, namun
jika berada pada udara akan secara cepat berubah warna menjadi kuning.
Furfural termasuk senyawa golongan
aldehid dengan gugus CHO posisi a (2). Furfural juga
mempunyai nama lain : 2-Formylfuran; 2-Furanaldehyde;
2-Furancarbonal; Cyclic aldehyde; 2-Furaldehyde; 2-FuraldehĂdo; 2-FuraldĂ©hyde;
alpha-Furole; Artificial ant oil; Fural; Furaldehyde; Furale; Furancarbonal;
Furfuraldehyde; Furfurole; Furfurylaldehyde; Furole; Pyromucic aldehyde;
2-Furylmethanal; Furfurale; Furfurol; 2-Furil-metanale; 2-Furankarbaldehyd;
Furfuralu; 2-Furylaldehyde xypropane; 2-Furylcarboxaldehyde; Qo furfural;
Furan-2-carboxaldehyde.
Jagung atau Maize (Zea mays sp.) adalah tanaman semusim
yang mempunyai batang berbentuk bulat, beruas-ruas dan tingginya antara 60 –
300 cm dan daunnya berbentuk seperti bendera, mempunyai panjang 100 cm
dan lebarnya 5-10 cm. Tanaman jagung dapat tumbuh di
dataran rendah sampai dataran tinggi
(ketinggian 0 - 1.300 m dpl). Zat-zat yang terkandung didalam tongkol
jagung adalah :
Hampir semua jenis teh ternyata berperan
besar terhadap kebugaran dan kesehatan peminumnya. Para ahli yang meneliti daun
teh sepakat, teh mengandung senyawa-senyawa bermanfaat seperti polifenol,
theofilin, flavonoid/metixantin, tanin, vitamin C dan E, catechin, serta
sejumlah mineral seperti Zn, Se, Mo, Ge, Mg. Semua itu tidak hanya berkhasiat bagi tubuh sebagai zat antimutagenik dan antikanker, mengobati gangguan saluran
pencernaan, serta membantu menetralkan lemak dalam makanan, tetapi juga
mencegah oksidasi lemak densitas rendah yang bisa menjadi plak, menurunkan
kolesterol darah, menyegarkan pernapasan, dan merangsang batang otak.
Zat flavonoid yang ada dalam daun teh,
memang berfungsi sebagai penangkal radikal bebas yang mengacaukan keseimbangan
tubuh dan menjadi salah satu pemicu kanker. Selain itu kehadiran polifenol,
theofilin, dan senyawa lainnya di daun teh membantu menghambat perkembangan
virus ataupun kelainan faat yang menimbulkan kanker [1].
Teh yang dipakai dalam pembuatan “bubble tea instant” ini adalah teh hijau
yang dikenal memiliki khasiat sebagai anti-kanker. Di samping bisa mencegah
kanker, teh hijau dipercaya bisa pula mencegah berbagai penyakit seperti
menghambat terbentuknya kolesterol darah, mengontrol tekanan darah tinggi,
menurunkan kadar gula darah, memperlambat penuaan, dan menyegarkan badan. Catechin
dalam teh hijau terbukti untuk menghambat tekanan darah tinggi [2]. Daun teh
yang dijadikan teh hijau biasanya langsung diproses setelah dipetik. Setelah
daun mengalami oksidasi dalam jumlah minimal, proses oksidasi dihentikan dengan
pemanasan (cara tradisional Jepang dengan menggunakan uap atau cara tradisional
Tiongkok dengan menggongseng di atas wajan panas). Teh yang sudah dikeringkan
bisa dijual dalam bentuk lembaran daun teh atau digulung rapat berbentuk
seperti bola-bola kecil (teh yang disebut gun powder).
Friday, 6 February 2015
Chemical Reaction Engineering Octave Levenspiel
Chemical Reaction Engineering, Third Edition helps students learn how to answer reactor design questions reliably and effectively. To accomplish this, the text emphasizes qualitative arguments, simple design methods, graphical procedures, and frequent comparison of capabilities of major reactor types. This approach helps students develop a strong intuitive sense for good design.
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For more ebook : E-book
Chemical Reaction Engineering, Third Edition helps students learn how to answer reactor design questions reliably and effectively. To accomplish this, the text emphasizes qualitative arguments, simple design methods, graphical procedures, and frequent comparison of capabilities of major reactor types. This approach helps students develop a strong intuitive sense for good design.
DOWNLOAD
For more ebook : E-book
Wednesday, 4 February 2015
Perry's Chemical Engineers' Handbook
(also known as Perry's Handbook or Perry's) was first published in 1934 and the most current eighth The subjects covered in the book include: physical properties of chemicals and other materials; mathematics; thermodynamics; heat transfer; mass transfer; fluid dynamics; chemical reactors and chemical reaction kinetics; transport and storage of fluid; heat transfer equipment; psychrometry and evaporative cooling; distillation; gas absorption; liquid-liquid extraction; adsorption and ion exchange; gas–solid, liquid–solid and solid–solid operations; biochemical engineering; waste management, materials of construction, process economics and cost estimation; process safety and many others. An electronic version of his reference book is provided by Knovel. The first edition was edited by John H. Perry who was a PhD physical chemist and chemical engineer for E. I. du Pont de Nemours & Co. W. S. Calcott (ChE) of DuPont was his assistant editor. It was published in 1934. The second edition was published in 1941. The third edition was edited by John H. Perry and published in 1950 The fourth edition was edited by Robert H. Perry, Cecil H. Chilton, and Sidney D. Kirkpatrick and published in 1963. The fifth edition was edited by Robert H. Perry and published in 1973. The sixth edition was published in 1984 and edited by Robert H. Perry and Donald W. Green. The 1997 seventh edition was edited by Robert H. Perry and Donald W. Green. The 2007/2008 eighth edition was edited by Don W. Green and Robert H. Perry.
Monday, 2 February 2015
| Encyclopedia of Nanoscience and Nanotechnology | |
| This 25-volume encyclopedia contains over seven-hundred state-of-the-art review chapters organized in an A-Z format to provide a complete coverage of advanced research in all nanotechnology related fields such as chemistry, physics, engineering and medical sciences. The review chapters are contributed by over 2,000 of the world's leading scientists from top-notch academic and industrial institutions worldwide. This 25-volume encyclopedia now contains 710 articles, 150,000 bibliographic citations and thousands of illustrations, figures, tables, and equations covering ca 22,000 pages which hundreds of images/figures/illustrations in color. The 25-volume set contains the largest number of state-of-the-art review chapters ever published in the world in the field of nanotechnology. Each chapter is fully cross-referenced, introducing some of the most important nanotechnologies under development today. The first edition of the Encyclopedia of Nanoscience and Nanotechnology, 10-Volume Set, (Edited by H. S. Nalwa, Foreword by Professor Richard E. Smalley, Nobel Prize Laureate, Endorsed by Professor Jean-Marie Lehn, Nobel Prize Laureate) that appeared in 2004 received the "Best Reference Work Award" of the American Society for Engineering Education (USA) and "Outstanding Academic Title" by the CHOICE magazine from the American Library Association (USA). With the addition of new 15 volumes (vols. 11-25) in 2011, the entire 25-volume set contains the largest number of articles ever published in the field of nanotechnology in the world. There is no match for this landmark reference since this encyclopedia covers all research topics reported over the past two decades. It is the most useful reference for all academic and research libraries. Volume 1 : Download Volume 2 : Download Volume 3 : Download Volume 4 : Download Volume 5 : Download Volume 6 : Download Volume 7 : Download (soon) Volume 8 : Download (soon) Volume 9 : Download (soon) Volume 10 : Download (soon) For more book : ebook |
Transport Processes and Separation Process Principles Geankoplis Free PDF Download
Excerpt
Preface
The title of this text has been changed from Transport Processes and Unit Operations to Transport Processes and Separation Process Principles (Includes Unit Operations). This was done because the term "unit operations" has been largely superseded by the term "separation processes," which better reflects the modern nomenclature being used.
In this fourth edition, the main objectives and the format of the third edition remain the same. The sections on momentum transfer have been greatly expanded, especially the sections on fluidized beds, flow meters, mixing, and non-Newtonian fluids. Material has been added to the chapters on mass transfer. The chapters on absorption, distillation, and liquid-liquid extraction have also been enlarged. More new material has been added to the sections on ion exchange and crystallization. The chapter on membrane separation processes has been greatly expanded, especially for gas-membrane theory.
The field of chemical engineering involved with physical and physical-chemical changes of inorganic and organic materials and, to some extent, biological materials is overlapping more and more with the other process-engineering fields of ceramic engineering, process metallurgy, agricultural food engineering, wastewater-treatment (civil) engineering, and bioengineering. The principles of momentum, heat, and mass transport and the separation processes are widely used in these processing fields.
The principles of momentum transfer and heat transfer have been taught to all engineers. The study of mass transfer has been limited primarily to chemical engineers. However, engineers in other fields have become more interested in mass transfer in gases, liquids, and solids.
Since chemical and other engineering students must study so many topics today, a more unified introduction to the transport processes of momentum, heat, and mass transfer and to the applications of separation processes is provided. In this text the principles of the transport processes are covered first, and then the separation processes (unit operations). To accomplish this, the text is divided into two main parts.
Anthony L. Andrady
Description:
Discover new and emerging applications of polymer nanofibers alongside the basic underlying science and technology. With discussions exploring such practical applications as filters, fabrics, sensors, catalysts, scaffolding, drug delivery, and wound dressings, the book provides polymer scientists and engineers with a comprehensive, practical "how-to" reference. Moreover, the author offers an expert assessment of polymer nanofibers' near-term potential for commercialization. Among the highlights of coverage is the book's presentation of the science and technology of electrospinning, including practical information on how to electrospin different polymer systems.
Find more e-book : e-book
Plant Design and Economics for Chemical Engineers
Max S. Peters, University of Colorado
Klaus Timmerhaus, University of Colorado, Boulder
Ronald E. West, University of Colorado, Boulder
Klaus Timmerhaus, University of Colorado, Boulder
Ronald E. West, University of Colorado, Boulder
The fifth edition of Plant Design and Economics for Chemical Engineers is a major revision of the popular fourth edition. There are new chapters on process synthesis, computer-aided design, and design of chemical reactors. A traditionally strong feature of the text, economic analysis, has been revamped and updated. Another strength, equipment sizing and cost estimation, is updated and expanded as well. These improvements also reflect changes in equipment availability.
The numerous real examples throughout the book include computer or hand solutions, and often both. There is a new increased emphasis on computer use in design, economic evaluation, and optimization. Concepts, strategies, and approaches to computer use are featured. These concepts are not tied to particular software programs and therefore apply to wide a range of applications software, of both current and future release.
This widely used text is now more useful than ever, providing a “one-stop” basic guide to chemical process design and evaluation.
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