Chemical Engineering

We studied the morphology, structure, and magnetic properties of Fe nanowires that were electrodeposited as a function of the electrolyte temperature. The nucleation mechanism followed instantaneous growth. At low temperatures, we observed an increase of the total charge reduced into the templates, thus suggesting a significant increase in the degree of pore filling. Scanning electron microscopy images revealed smooth nanowires without any characteristic features that would differentiate their morphology as a function of the electrolyte temperature. X-ray photoelectron spectroscopy studies indicated the presence of a polycarbonate coating that covered the nanowires and protected them against oxidation. The X-ray diffraction measurements showed peaks coming from the polycrystalline Fe bcc structure without any traces of the oxide phases. The crystallite size decreased with an increasing electrolyte temperature. The transmission electron microscopy measurements proved the fine-crystal...

An efficient and new but non-intrusive method to detect the fluctuation in gear load may be the motor current signature analysis (MCSA). In this paper, a multi-stage transmission gearbox (with and without defects) has been studied in order to replace the conventional vibration monitoring by MCSA. It has been observed through FFT analysis that low frequencies of the vibration signatures have sidebands across line frequency of the motor current whereas high frequencies of vibration signature are difficult to be detected. Hence, discrete wavelet transform (DWT) is suggested to decompose the current signal, and FFT analysis is carried out with the decomposed current signal to trace the sidebands of the high frequencies of vibration

Laboratory Information System (LIS) streamlines workflow in the laboratory and eliminates time-consuming paperwork. The business today is getting increasingly pressured to be more productive and efficient with less traditional resources. If we look at a typical production process, for instance, the level of automation and optimization that has permeated into the production floor is quite astounding. Many industries have had a tremendous impact in bringing to the market the automation and optimization solutions to streamline -the production floor. The other ends of the spectrum are the back-office transaction oriented processes like Inventory Management, Materials Management, Financials and so on, Therefore a lab’s ability to process data quickly and its ability to disseminate that information efficiently throughout the plant is vital for the success of the production process. Laboratory Information Management System (LIMS) can help in managing the information flow within the lab and can be the modus operandi of connecting the lab with the rest of the organization. For instance, imagine all the information that is generated in a lab.

Rheological techniques are used to investigate the rejuvenation of aged bitumen. The thermal transition associated with the collapse of the compact structure constituted by asphaltene is determined by Dynamic Mechanical Thermal Analysis. For aged bitumen, this transition shifts to a higher temperature but when rejuvenating agents are added, the transition returns to its original value. The “rutting factor,” G*/sin δ allows to define the maximum temperature the binder can reach without permanent deformation. The employed rejuvenating agents are suitable because permanent deformation is postponed. Viscosity results reveal that aged bitumen needs a high mixing temperature (>200°C) to behave like a fluid material able to wet, adhere, and envelop aggregates. The addition of rejuvenating agents considerably reduces mixing and compaction temperatures. The mixture of 80% aged bitumen—20% recycled motor oil, obtained exclusively from waste materials is an apt binder that can compete satisfactorily with new 60/70 bitumen.

The book points out that rural regions need proper attention at the global level concerning solid waste management sector where bad practices and public health threats could be avoided through traditional and integrated waste management
routes. Solid waste management in rural areas is a key issue in developing and transitioning countries due to the lack of proper waste management facilities and services. The book further examines, on the one hand, the main challenges in the development of reliable waste management practices across rural regions and, on the other hand, the concrete solutions and the new opportunities across the world in dealing with municipal and agricultural wastes. The book provides useful information for academics, various professionals, the members of civil society, and national and local authorities.

Lemak merupakan sekelompok besar molekul-molekul alam yang terdiri atas unsur-unsur karbon, hidrogen, dan oksigen meliputi asam lemak, malam, sterol, vitamin-vitamin yang larut di dalam lemak (contohnya A, D, E, dan K), monogliserida, digliserida, fosfolipid, glikolipid, terpenoid (termasuk di dalamnya getah dan steroid) dan lain-lain. Lemak secara khusus menjadi sebutan bagi minyak hewani pada suhu ruang, lepas dari wujudnya yang padat maupun cair, yang terdapat pada jaringan tubuh yang disebut adipose.

Petroleum industry has a major share in the world energy and industrial markets. In the recent
years, petroleum industry has grown increasingly complex as a result of tighter competition,
stricter environmental regulations and lower-margin profits. It is facing a challenging task to
remain competitive in a globalized market, the fluctuating demand for petroleum products and the
current situation of fluctuating high petroleum crude oil prices is a demonstration that markets
and industries throughout the world are impacted by the uncertainty and volatility of the
petroleum industry.
These factors and others forced petroleum companies for a greater need in the strategic planning
optimization and sensitivity analysis in order to make decisions that satisfy conflicting multiobjective goals of maximizing expected profit while simultaneously minimizing risk. These
decisions have to take into account uncertainties and constraints in factors such as the source and
availability of raw material, production and distribution costs and expected market demand.
This book discusses the full aspects concerning the Petroleum Refinery starting from its history
reaching a plant design for the products refinery processes and naphtha processing with the help
of an industrial simulation programs such as Aspen HYSYS. It covers refinery classification, crude
oil structure and economics, in addition to the refinery processing line from the beginning of the
handling of the feed introduced to plant units passing through the desalting, preheating, flashing
units till reaching the separation processes in distillation towers producing the refinery products,
vacuum tower distillation and the naphtha processing using the modern technique Methaforming
that are all discussed theoretically and simulated for a real-life Petroleum Plant Production Units
using the industrial simulating programs.
This finally demonstrate the full image of the petroleum refinery processes importance to the local
and international world of petroleum and petrochemical industries and human’s life.

“The CIH Exam - Essential Practice Questions by Farcas, Hammond, and Cena is, as the name implies, an essential set of questions in Industrial Hygiene. It is well laid out in 17 sections. The questions are well introduced with a short narrative before the introduction of the pertinent equations and solution to the over 500 example problems. The book serves not only as a formidable preparation for the CIH exam but a good review of basic principles, a reference for many of the day-to-day technical issues confronting the practicing industrial hygienist, and a guide for raising awareness of potential problems for which alert action is required. The authors bring a breadth of experience and insight into the issues handled in the text. They bring context to the basic principles to be highlighted by the examples of the questions and their solutions. This should be a must-have text for everyone in the field.”Michael McCawley, Ph.D.

Denila, Richard V.
This study investigated the relationship of high school chemistry students’ motivation to learn and attitude towards chemistry with their chemistry academic achievement.  This study was conducted at Norala National High School, Division of South Cotabato, for the school year 2009-2010.
The study made use of the correlation method with the questionnaires in Likert scale to gather the data.  The instruments used were: Motivation questionnaire to learn (as adopted and modified by Ortiz, 1997) for determining the students’ motivation to learn chemistry; the Attitude Towards Science Scale (ATSS) by Wilkinson, 1979, as adopted by Alava, 2004 for determining the students’ attitude towards chemistry; and the Achievement Test in Chemistry for ascertaining the academic achievement of the third year chemistry students.  The statistical tools used in the study were frequency count, percentage, the mean, standard deviation, and Pearson product-moment correlation (r) at 0.05 confidence level. 
Findings showed that the third year students are motivated in achievement, in affiliation, in competence, and in maintenance to learn chemistry. Study show that they have the desire to learn the concepts and skills in chemistry. Collectively, the third year high school  students’  have  favorable  attitude  towards  chemistry.    The academic performance level of the of the third year students in high school chemistry is satisfactory. This indicates that the students are moderately competent in the knowledge and skills in chemistry. There is a statistically significant relationship between the third year students’ motivation to learn chemistry and their attitude towards chemistry. A statistically significant relationship exists between the third year students’ motivation to learn chemistry and their academic achievement in chemistry.  Statistically there is a significant relationship between the third year students’ attitude towards chemistry and their academic achievement in chemistry.

Marketing is an integral part of every organization and the term marketing communications was initially seen to be a managerial task. Most marketing communication methodologies are focused on advertising, sales promotion, direct marketing and public relations. The new technological innovations provide an opportunity to enhance the visibility products and promotions. Further, they actively engage consumers through various media. Due to the continuous development and innovations in the digital media the original proposal of IMC framework has become partially or fully obsolete. The main objective of this paper is to evaluate the theoretical review of IMC during the last decade.

Chapter 1: Process Background & Selection
Chapter 2: Site Location
Chapter 3: Mass Balance
Chapter 4: Energy Balance
Chapter 5: Process Simulation
Chapter 6: Environmental and Waste Management
Chapter 7: Process Integration
Chapter 8: Process Control & Instrumentation
Chapter 9: Design of Major Equipment (Chemical & Mechanical)
Chapter 10: Economic Analysis
Chapter 11: Plant Safety & Layout

Excel spreadsheet Settling Velocity.xls (2.1) calculates the terminal settling velocity of single spherical particles and of single natural sediment particles, in liquids and gases. It also predicts the hindered settling velocity of concentrated suspensions, by using Richardson & Zaki’s Law.
Guo (2002), Song Zhiyao et al. (2008), and Cheng (2009) combined the 3 “classical” settling velocity equations on laminar flow (Stokes’ Law), intermediate flow, and turbulent flow (Newton’s Law) each to only one relatively simple “new” settling velocity equation, used in this spreadsheet.
Calculations by these new settling laws are compared and contrasted with the sometimes tedious
classical calculations, and validated by graphical and manual sedimentation calculations.
13 worked examples illustrate how to use this spreadsheet, and how do manual calculations.

Soaps and detergents are used frequently in our daily life. There is a significant difference between them where the soaps are produced from the natural products while the detergents are synthetic or man-made. The objectives of the experiment is to prepare soap and compare its properties to that of a synthetics detergent. The soap is prepared by heating the mixture of mineral oil, ethanol and sodium hydroxide until they become paste-like mixture before being cooled off in ice bath for 15 minutes and filtered using vacuum filtration apparatus. The filtered soap is then stored in vacuum chamber for one week to ensure the water is fully removed from the soap. The synthetics detergent used in the experiment is Dynamo. The pH of the soap and detergent is 11 and 8, respectively. Emulsification occurs only on the distilled water sample and not on detergent solution and soap solution sample. Soap produce precipitate if in contact with acidic water or hardness in water such as Ca2+, Mg2+ and Fe3+ ion as in the experiment but not the case for detergent. The hydrochloric acid needed to change the pH of the soap solutions to 3 is 10 drops of HCl while for detergent solution is 2 drops of HCl. Relative cleanliness for detergent solution, soap solution and detergent without dilution with distilled water are the most clean, clean and slightly clean, respectively. Detergent solution is more effective compared to soap solution. The objectives are successfully obtained, therefore the experiment is successfully done.