Chemistry 2.

Contiene todo lo básico para los estudiantes que han terminado el General Certificate of Secundary Education (GCSE). La publicación está organizada en tres parte:primera parte cadenas y anillos renovados; Arenes; compuestos de carbonilo; esteres y ácidos carboxílicos, compuestos de nitrógeno; stereoisomería en síntesis orgánica, polímeros; espectroscopia. Segunda parte:entalpía; grupo III de la Tabla Periódica; Los elementos de transición. En la tercera parte se unifican conceptos. Las preguntas de auto-evaluación al final de cada capítulo ofrecen oportunidades para el estudio independiente. Tiene un glosario de palabras clave, apéndice con la tabla del Sistema Periódico, respuestas a la auto-evaluación e índice.

AQA GCSE Chemistry. 'AQA GCSE : Química'.

Ofrece una cobertura completa de los conocimientos e ideas exigidos para el examen del General Certificate Secondary Education (GCSE) ofrecido por el organismo AQA. Pone énfasis en favorecer la comprensión en el alumnado de cómo trabaja la química y para ello utiliza ejemplos y actividades tomados de situaciones cotidianas y muestra sus aplicaciones en la vida real. Estas experiencias les preparan, además, para adquirir habilidades en la investigación científica y en tareas prácticas. Va acompañado de una guía para el profesor.

AQA GCSE Chemistry : teacher's guide. 'AQA GCSE Química : guía del profesor'.

Al igual que el libro del alumno, esta guía para el profesor apoya un nuevo estilo de enseñanza para el examen del General Certificate Secondary Education (GCSE), basado en hacer hincapié en la comprensión de cómo trabaja la ciencia química y en utilizar ejemplos y aplicaciones de ésta para situaciones de la vida real. Además, también favorece el desarrollo de habilidades científicas y de tareas prácticas en los estudiantes. Incluye un CD-ROM con material en formato Word con una planificación del trabajo que puede ser utilizada o modificada y, también, contiene actividades prácticas para la clase y tareas para casa.

Edexcel 360 Science. Teacher pack : for GCSE biology, chemistry and physics.

Prepara a los estudiantes para la obtención del título General Certificate Secondary Education (GCSE) otorgado por el organismo Edexcel. Este recurso proporciona al profesor las respuestas a las preguntas del libro del alumno, apoyo adicional con cuadernos de trabajo y actividades prácticas para las clases. Al texto impreso le acompaña un CD-ROM con material didáctico en formato Word y PDF. Tiene como material de apoyo el libro del alumno.

Edexcel 360 Science : for Edexcel GCSE biology, chemistry, physics.

Prepara a los estudiantes para la obtención del título General Certificate Secondary Education (GCSE) otorgado por el organismo Edexcel en ciencias, que comprende biología, química y física. Tiene como material de apoyo el recurso para el profesor, impreso y en CD-Rom, con hojas de trabajo y actividades.

Chemistry : IGCSE revision guide.

Guía para la revisión del International General Certificate of Secondary Education (IGCSE) Química. Proporciona preguntas de examen, organizadas por temas, con indicaciones y recomendaciones sobre cómo mejorar la realización de la prueba. Contiene ejercicios de vocabulario para apoyar a los estudiantes que no tienen el inglés como idioma materno.

IGCSE chemistry.

Proporciona una cobertura completa del plan de estudios para el International General Certificate of Secondary Education (IGCSE ) de Química y ayuda a los estudiantes a alcanzar niveles óptimos de aprendizaje. El libro se apoya en un CD-ROM que contiene amplia revisión y preguntas prácticas del examen, información y material de referencia.

An operationally simple sonogashira reaction for an undergraduate organic chemistry laboratory class

An operationally simple, reliable, and cheap Sonogashira reaction suitable for an undergraduate laboratory class that can be completed within a day-long (8 h) laboratory session has been developed. Cross-coupling is carried out between 2-methyl-3-butyn-2-ol and various aryl iodides using catalytic amounts of bis-(triphenylphosphine)palladium(II) dichloride, with copper(I) iodide as a cocatalyst, in triethylamine at room temperature, so a range of products can be prepared within a single group and results compared. The coupling itself is usually complete within 1.5 h and is easily monitored by TLC, leaving up to 6 h for purification and characterization. Purification is by “mini flash column chromatography” through a plug of silica encased in the barrel of a plastic syringe, so the procedure is amenable to large class sizes.

Using problem-based learning in a chemistry practical class for pharmacy students and engaging them with feedback

Objective: To introduce a new approach to problem based learning (PBL) used in the context of medicinal chemistry practical class teaching pharmacy students. Design: The described chemistry practical is based on independent studies by small groups of undergraduate students (4-5), who design their own practical work taking relevant professional standards into account. Students are carefully guided by feedback and acquire a set of skills important to their future profession as healthcare professionals. This model has been tailored to the application of PBL in a chemistry practical class setting for a large student cohort (150 students). Assessment: The achievement of learning outcomes is based on the submission of relevant documentation including a certificate of analysis, in addition to peer assessment. Some of the learning outcomes are also assessed in the final written examination at the end of the academic year. Conclusion: The described design of a novel PBL chemistry laboratory course for pharmacy students has been found to be successful. Self-reflective learning and engagement with feedback were encouraged, and students enjoyed the challenging learning experience. Skills that are highly essential for the students’ future careers as healthcare professionals are promoted.

Using 3D Animations in Teaching Chemistry

This paper discuss possibilities of use of 3D animation as a tool for teaching Chemistry support. The research proposes to investigate the conception process and development of educational animations to use in a Blended Learning environment in undergraduate chemistry. Associated with general chemistry teachers, were raised the demands and difficulties on the content transmission, and the most relevant topics, about "Atomic Theory" with propose to create appropriate animations to meeting needs of themes. Thinking about offering more dynamic materials, we elaborate animations in a format of "micro-documentary", with a length between 4 and 7 minutes. We use the narration aloud to the subject-matter understanding, leaving the external text as a complement of the animation. The conclusions are positives, students accepted well the format and they proved are able to remember, organize and systematize several information presented in animations. These skills don't ensure knowledge acquisition, but may be considered prerequisites to learning occur.

Reptilian chemistry: Characterization of dianeackerone, a secretory product from a crocodile

The major volatile component in the paracloacal glandular secretion of the adult African dwarf crocodile (Osteolaemus tetraspis) was isolated and characterized as a 19-carbon aromatic ketone, dianeackerone (3,7-diethyl-9-phenyl-2-nonanone). This ketone is absent from the secretion of immatures. Careful examination of dianeackerone samples isolated from individual adults revealed that this ketone occurs as both the (3S, 7S) and (3S, 7R) stereoisomers, with different individuals presenting strikingly different ratios of the isomeric forms. Our initial suspicion that the stereoisomeric dianeackerones might be indicators of gender proved untenable, leaving the role of these glandular constituents a challenge for future study.

Functional surface chemistry of carbon-based nanostructures

The recently discovered abilities to synthesize single-walled carbon nanotubes and prepare single layer graphene have spurred interest in these sp2-bonded carbon nanostructures. In particular, studies of their potential use in electronic devices are many as silicon integrated circuits are encountering processing limitations, quantum effects, and thermal management issues due to rapid device scaling. Nanotube and graphene implementation in devices does come with significant hurdles itself. Among these issues are the ability to dope these materials and understanding what influences defects have on expected properties. Because these nanostructures are entirely all-surface, with every atom exposed to ambient, introduction of defects and doping by chemical means is expected to be an effective route for addressing these issues. Raman spectroscopy has been a proven characterization method for understanding vibrational and even electronic structure of graphene, nanotubes, and graphite, especially when combined with electrical measurements, due to a wealth of information contained in each spectrum. In Chapter 1, a discussion of the electronic structure of graphene is presented. This outlines the foundation for all sp2-bonded carbon electronic properties and is easily extended to carbon nanotubes. Motivation for why these materials are of interest is readily gained. Chapter 2 presents various synthesis/preparation methods for both nanotubes and graphene, discusses fabrication techniques for making devices, and describes characterization methods such as electrical measurements as well as static and time-resolved Raman spectroscopy. Chapter 3 outlines changes in the Raman spectra of individual metallic single-walled carbon nantoubes (SWNTs) upon sidewall covalent bond formation. It is observed that the initial degree of disorder has a strong influence on covalent sidewall functionalization which has implications on developing electronically selective covalent chemistries and assessing their selectivity in separating metallic and semiconducting SWNTs. Chapter 4 describes how optical phonon population extinction lifetime is affected by covalent functionalization and doping and includes discussions on static Raman linewidths. Increasing defect concentration is shown to decrease G-band phonon population lifetime and increase G-band linewidth. Doping only increases G-band linewidth, leaving non-equilibrium population decay rate unaffected. Phonon mediated electron scattering is especially strong in nanotubes making optical phonon decay of interest for device applications. Optical phonon decay also has implications on device thermal management. Chapter 5 treats doping of graphene showing ambient air can lead to inadvertent Fermi level shifts which exemplifies the sensitivity that sp2-bonded carbon nanostructures have to chemical doping through sidewall adsorption. Removal of this doping allows for an investigation of electron-phonon coupling dependence on temperature, also of interest for devices operating above room temperature. Finally, in Chapter 6, utilizing the information obtained in previous chapters, single carbon nanotube diodes are fabricated and characterized. Electrical performance shows these diodes are nearly ideal and photovoltaic response yields 1.4 nA and 205 mV of short circuit current and open circuit voltage from a single nanotube device. A summary and discussion of future directions in Chapter 7 concludes my work.