Preventa de eBooks de Química

The awe-inspiring, little-known story of Nobel laureate Frances Arnolds discovery of directed enzyme evolutionand how it was sparked by reading Jorge Luis Borges.In 1976, a young engineering student from Princeton, Frances Arnold, happened upon Jorge Luis Borgess short story The Library of Babel while in Madridthe tale of a vast honeycomb of a library that contains all the answers to the mysteries of humanity. Little did Arnold know that the story would change the course of her lifeand the course of science.In Multiplicity, Telmo Pievani explores her journey and the significanceand scientific potentialof Borgess legendary library and others like it. A famous evolutionist, John Maynard Smith, for instance, had fantasized about the existence of a similar enormous library: full not of books, but of proteins. And, in 1994, a philosopher of mind, Daniel Dennett, would devise a library no less confounding: one that collects all possible genomes, or all the possible combinations of the nucleotide bases of DNA. Why? Because by comparing all the proteins, genomes, and plants and animals that exist and have existed throughout evolution, what is finally revealed is possibility: what doesnt exist but could.For Frances Arnold, the concept of such a library ultimately led to the discovery of the directed evolution of enzymes: a way of using natures own method to produce new and better enzymes. The revolutionary idea transformed protein chemistry and biotechnology and earned her the Nobel prize in chemistry in 2018.With literary echoes ranging from Borges to Italo Calvino, this slim book tells her brilliant story.

The comprehensively updated third edition of a popular introductory statistical thermodynamics text that describes the principles and forces that drive chemical and biological processes.This widely used, comprehensively updated introductory text on statistical thermodynamics describes the principles and forces that drive chemical and biological processes. It explains how a few simple physical principles cause the complex behaviors of molecules, and how simple models provide surprisingly accurate insights into the workings of the molecular world. Written in an accessible, student-friendly style without compromising rigor, Molecular Driving Forces offers an excellent introduction to the subject for beginners and a valuable resource for experts.3rd edition highlights: New chapter on the nonequilibrium dynamics of driven, adaptive, and evolving systems New appendix on stochastic dynamics, including master equations and the Fokker-Planck model New vignettes on the Bayes Theorem, reverse osmosis membranes, and the chemiosmotic hypothesis Comprehensively updated examples, references, and end-of-chapter questions Instructor resources available

By one of the worlds leading chemists, an entertaining and revealing tour of the chemical bonds that shape our everyday lives and provide the infrastructure for our chaotic world.We all have a relationship with chemistry. Bonds between molecules, forged and broken in the blink of an eye, underpin everything from the food we eat and the clothes we wear to the ways we treat illnesses and construct our homes. Its a relationship we nurture, whether we know it or not, and for leading chemist Ijeoma Uchegbu, it was serious from the beginning.In Chain Reaction, Uchegbu shows us the world through a chemists eyes, revealing the intricate science we take for granted: how our bodys most fundamental chemical structure, our DNA, is estimated to be two meters long, resting tightly within each of our cells; how egg yolks are held together by weak chemical bonds that make them primed for emulsifying our salad dressings; and how the chemical makeup of PFAs, or forever chemicals, makes them so good at sticking around.Along the way, we travel from Uchegbus home in London to Nigeria, where cooking experiments go awry in her family kitchen, and to Italy, where the chemically inert compounds that make up stained glass keep medieval windows shining. The careful interplay of bonds and molecules brings a sense of order and wonder to the chaos of our lives, she shows, and we dont have to wear a lab coat or study solutions in beakers to appreciate it.For readers of Astrophysics for People in a Hurry and anyone who wanted to be like Elizabeth Zott in Lessons in Chemistry, Chain Reaction is a lively and intimate portrait of the wondrous and under-explored field that shapes our everyday lives.

Ce livre propose aux étudiants en première année d’études supérieures plus de 300 exercices dans les domaines classiques de la chimie physique et de la chimie organique pour un entraînement intensif