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Education of chemical engineering in Spain: A global picture
Publication date: July 2018Source: Education for Chemical Engineers, Volume 24Author(s): Gumersindo Feijoo, Raquel Ibañez, Javier Herguido, Pedro Partal, Montserrat Tobajas, Julia Sèmpere, María Fernanda López-Pérez, Maria J. RiveroAbstractThe general framework of the Chemical Engineering studies in Spain includes the Bachelor's Degree (4 years), Master's Degree (the most common duration is 1.5 years) and Doctorate (3-4 years). In 2008, the Conference of Directors and Deans of Chemical Engineering (CODDIQ) was constituted with the main objective of promoting and improving the quality of Chemical Engineering studies in...
Source: Education for Chemical Engineers - July 6, 2018 Category: Chemistry Source Type: research

KBR (Kinetics in Batch Reactors): a MATLAB-based application with a Friendly Graphical User Interface for chemical kinetic model simulation and parameter estimation
Publication date: Available online 16 November 2018Source: Education for Chemical EngineersAuthor(s): Raúl Molina, Gisela Orcajo, Fernando MartinezAbstractThe simulation of chemical kinetic models is necessary in order to analyze comprehensive chemical reaction mechanisms and perform the estimation of the kinetic parameters. In many cases, a chemical process can be composed of several series and/or independent reactions that requires a complex set of kinetic equations to be solved. Computer-based tools for the study of kinetics of chemical reaction networks have been used since the last 50 years. However, the educational ...
Source: Education for Chemical Engineers - November 16, 2018 Category: Chemistry Source Type: research

Deciphering nucleic acid modifications by chemical derivatization-mass spectrometry analysis
Publication date: January 2019Source: Chinese Chemical Letters, Volume 30, Issue 1Author(s): Meng-Dan Lan, Bi-Feng Yuan, Yu-Qi FengAbstractNow increasing chemical modifications are discovered on genomic DNA and RNA. Up to date, more than 150 chemical modifications are identified in nucleic acids. These chemical modifications do not change the sequence of DNA and RNA, but alter their structures and biochemical properties, and eventually control or regulate the spatial and temporal expression of genes. Elucidation of the functional roles of these modifications is vital to our understanding of living organisms. However, the m...
Source: Chinese Chemical Letters - January 4, 2019 Category: Chemistry Source Type: research

Reprint of: Education of chemical engineering in Spain: A global picture
Publication date: Available online 2 February 2019Source: Education for Chemical EngineersAuthor(s): Gumersindo Feijoo, Raquel Ibañez, Javier Herguido, Pedro Partal, Montserrat Tobajas, Julia Sèmpere, María Fernanda López-Pérez, Maria J. RiveroAbstractThe general framework of the Chemical Engineering studies in Spain includes the Bachelor's Degree (4 years), Master's Degree (the most common duration is 1.5 years) and Doctorate (3-4 years). In 2008, the Conference of Directors and Deans of Chemical Engineering (CODDIQ) was constituted with the main objective of promoting and improving the quality of Chemical Engineerin...
Source: Education for Chemical Engineers - February 2, 2019 Category: Chemistry Source Type: research

Sustainability indicators for end-of-life chemical releases and potential exposure
Publication date: December 2019Source: Current Opinion in Chemical Engineering, Volume 26Author(s): Jose D Hernandez-Betancur, Gerardo J Ruiz-MercadoUnderstanding the chemical risk to environment and human health is an important issue when a waste management strategy and a control risk system are analyzed and selected. This is even more important at the end-of-life (recycling, recovery and disposal) scenario for a chemical due to the uncertainty in respect of the most susceptible receptors (e.g. workers), pathways (e.g. groundwater), routes (e.g. inhalation) and hazard (e.g. cancer) associated to a chemical exposure. Hence...
Source: Current Opinion in Chemical Engineering - November 26, 2019 Category: Chemistry Source Type: research

IJERPH, Vol. 17, Pages 1927: Feasibility Evaluation of Designated Quantities for Chemicals Requiring Preparation for Accidents in the Korean Chemical Accident Prevention System
Bu-Soon Son To prevent chemical accidents, the United States (US), the European Union (EU), and the Republic of Korea operate legal systems, such as risk management plans (RMP) and process safety management (PSM), to prevent chemical accidents inside and outside the workplace. The duty to implement chemical accident prevention systems and the criteria for being a target workplace are dependent on the designated quantities of chemicals handled. A chemical accident prevention system is obligatory for storage and handling of legally declared chemicals in the workplace. Benzene, toluene, xylene, methyl ethyl ketone, and et...
Source: International Journal of Environmental Research and Public Health - March 15, 2020 Category: Environmental Health Authors: Mun Seob Ahn Hyo Eun Lee Kwang Soo Cheon Huoung Gi Joo Ochang Chemical Safety Community Ochang Chemical Safety Community Bu-Soon Son Tags: Article Source Type: research

Models of necessity
Abstract The way chemists represent chemical structures as two-dimensional sketches made up of atoms and bonds, simplifying the complex three-dimensional molecules comprising nuclei and electrons of the quantum mechanical description, is the everyday language of chemistry. This language uses models, particularly of bonding, that are not contained in the quantum mechanical description of chemical systems, but has been used to derive machine-readable formats for storing and manipulating chemical structures in digital computers. This language is fuzzy and varies from chemist to chemist but has been astonishingly successful an...
Source: Beilstein Journal of Organic Chemistry - July 12, 2020 Category: Chemistry Authors: Beilstein Journal of Organic Chemistry - Syndicated Feeds Tags: chemical bonding chemical ontologies chemical structure formats chemical structure representation chemical structure models language of chemistry quantum chemistry Commentary Source Type: research

Enhancing native chemical ligation for challenging chemical protein syntheses.
Abstract Native chemical ligation has enabled the chemical synthesis of proteins for a wide variety of applications (e.g., mirror-image proteins). However, inefficiencies of this chemoselective ligation in the context of large or otherwise challenging protein targets can limit the practical scope of chemical protein synthesis. In this review, we focus on recent developments aimed at enhancing and expanding native chemical ligation for challenging protein syntheses. Chemical auxiliaries, use of selenium chemistry, and templating all enable ligations at otherwise suboptimal junctions. The continuing development of t...
Source: Current Opinion in Chemical Biology - July 30, 2020 Category: Biochemistry Authors: Giesler RJ, Erickson PW, Kay MS Tags: Curr Opin Chem Biol Source Type: research

Chemical vitiligo: A subset of vitiligo
Sanjay GhoshIndian Journal of Dermatology 2020 65(6):443-449 Chemical leucoderma, an under-diagnosed common condition often mimicking idiopathic vitiligo, represents an acquired depigmentation induced by repeated exposure to specific chemical compounds in subjects with genetic susceptibility to vitiligo. This has been increasing rapidly in incidence in recent decades in developing countries like India. The term 'chemical vitiligo' was first coined by us to indicate the possible relationship between chemical leucoderma and vitiligo, which has been supported recently by other authors to designate the t...
Source: Indian Journal of Dermatology - October 23, 2020 Category: Dermatology Authors: Sanjay Ghosh Source Type: research

Chromo-fluorogenic sensors for chemical warfare agents in real-time analysis: journey towards accurate detection and differentiation
Chem Commun (Camb). 2021 Mar 16. doi: 10.1039/d1cc00132a. Online ahead of print.ABSTRACTThe existence of chemical weapons (blister and nerve agents) is an unfortunate reality of the modern world. The usage of these chemical agents by rogue states or terrorist groups has showcased their ugly faces in the past and even in recent years. Despite extensive and strenuous efforts by the Organization for the Prohibition of Chemical Weapons (OPCW) to eliminate chemical warfare agents (CWAs) by the prohibition of their production and the destruction of their stockpiles, many countries still possess them in enormous quantities. Given...
Source: Chemical Communications - March 16, 2021 Category: Chemistry Authors: Vinod Kumar Source Type: research

Syria chemical attacks: when science takes a back seat to morality
Obama and Kerry have taken a moral stance on the use of chemical weapons in Syria. The perception that requesting Congressional support illustrates US weakness is follyAs the UN scientists and weapons inspectors analyse the data retrieved from the purported site of the chemical attack in Damascus, there remains little doubt that Assad's regime in Syria bears responsibility for the horrific gassing which killed over 1,400 people on 21 August. In any case, since the UN inspectors do not plan to report on who is responsible for the murderous attacks, the scientific evidence that the inspectors will provide has become a moot p...
Source: Guardian Unlimited Science - September 2, 2013 Category: Science Authors: Steve Caplan Tags: theguardian.com Blogposts Barack Obama US foreign policy Chemical weapons World news US politics Syria Obama administration John Kerry Science Source Type: news

Chemical pleurodesis for spontaneous pneumothorax.
Abstract Pneumothorax is defined as the presence of air in the pleural cavity. Spontaneous pneumothorax, occurring without antecedent traumatic or iatrogenic cause, is sub-divided into primary and secondary. The severity of pneumothorax could be varied from asymptomatic to hemodynamically compromised. Optimal management of this benign disease has been a matter of debate. In addition to evacuating air from the pleural space by simple aspiration or chest tube drainage, the management of spontaneous pneumothorax also focused on ceasing air leakage and preventing recurrences by surgical intervention or chemical pleuro...
Source: J Formos Med Assoc - November 20, 2013 Category: Journals (General) Authors: How CH, Hsu HH, Chen JS Tags: J Formos Med Assoc Source Type: research

Chem‐Path‐Tracker An automated tool to analyze chemical motifs in molecular structures.
This article is protected by copyright. All rights reserved. Chem‐Bio‐Tracker allows the location of relevant chemical motifs in protein structures using a modified version of the Dijkstra's algorithm. The chemical motifs can be a small group of residues or structure protein fragments with highly conserved properties that have important biological functions. To simplify this sort of analysis we developed a GUI that was embedded in VMD. The Chem‐Path‐Tracker package is distributed as an independent platform, and can be found at http://www.fc.up.pt/PortoBioComp/database/doku.php?id=chem-path-tracker.
Source: Chemical Biology and Drug Design - April 29, 2014 Category: Biology Authors: J V Ribeiro, N M F S A Cerqueira, P A Fernandes, M J Ramos Tags: Research Article Source Type: research

chem‐path‐tracker: An Automated Tool to Analyze Chemical Motifs in Molecular Structures
In this article, we propose a method for locating functionally relevant chemical motifs in protein structures. The chemical motifs can be a small group of residues or structure protein fragments with highly conserved properties that have important biological functions. However, the detection of chemical motifs is rather difficult because they often consist of a set of amino acid residues separated by long, variable regions, and they only come together to form a functional group when the protein is folded into its three‐dimensional structure. Furthermore, the assemblage of these residues is often dependent on non‐covale...
Source: Chemical Biology and Drug Design - June 7, 2014 Category: Biology Authors: João V. Ribeiro, N. M. F. S. A. Cerqueira, Pedro A. Fernandes, Maria J. Ramos Tags: Research Article Source Type: research