It is difficult to imagine modem technology without small particles, 1-1000 nm in size, because virtually every industry depends in some way on the use of such materials. Catalysts, printing inks, paper, dyes and pigments, many medicinal products, adsorbents, thickening agents, some adhesives, clays, and hundreds of other diverse products are based on or involve small particles in a very fundamental way. In some cases finely divided materials occur naturally or are merely a convenient form for using a material. In most cases small particles play a special role in technology because in effect they constitute a different state of matter because of the basic fact that the surface of a material is different from the interior by virtue of the unsaturated bonding interactions of the outermost layers of atoms at the surface of a solid. Whereas in a macroscale particle these differences are often insignificant, as the 9 surface area per unit mass becomes larger by a factor of as much as 10 , physical and chemical effects such as adsorption become so pronounced as to make the finely divided form of the bulk material into essentially a different material- usually one that has no macroscale counterpart.
This book presents the multifaceted aspects of rare earth elements (REEs), focusing on both their potential benefits and adverse health effects. The adverse impacts of REEs on human and environmental health raise a growing concern not only in the scientific community but also among a number of stakeholders, potentially including students, media workers, and decision makers. The recognized and potential benefits arising from REE-related technological applications may envisage their further advantages.
A limited number of books have been devoted so far to REEs, and they mainly focus on REE-related chemistry, mineralogy, economy, and developing technologies for these elements. This book presents recent research achievements in REE-associated health effects, which have been mostly confined to journal reports on individual laboratory studies so far. It is an updated and balanced approach to REE research and technology. It provides novel yet established information as stated in the title "At the Crossroads between Toxicity and Safety," with particular emphasis on the hormesis phenomenon.
When an eccentric professor acquires an ancient book, a riddle on a spare piece of parchment tucked neatly within its pages leads him and his nephew on an unparalleled adventure. The unlocked riddle brings them to a remote mountain on Iceland, where they enter an extinct volcano on a daring quest to reach the center of the earth. They soon find themselves at a giant underground ocean where the laws of science are constantly redefined and prehistoric creatures are in abundance. But in the bowels of the earth, a shocking discovery pits the travellers face to face with their own terrifying past. Jules Verne's A Journey to the Center of the Earth has been read by millions of inquisitive minds and has influenced some of the worlds most famous explorers such as Admiral Byrd, who announced on his 1926 expedition to the North Pole that "it is Jules Verne who is bringing me." And renowned cave explorer Norbert Casteret said in 1938 that A Journey to the Center of the Earth was a "marvelous book which impressed and fascinated me more than any other. I have re-read it many times, and I confess I sometimes re-read it still, each time finding anew the joys and enthusiasm of my childhood."
Fine Life for a Country Mouse covers the concepts Appreciating Differences and Family.
It has been said that author Tom Winton is a man who writes with his pen dipped in his soul. Like all his previous Amazon best-selling books, his new novella, Within a Man's Heart, is packed with intrigue and emotion. Mr. Winton has been listed as an Amazon Top 100 Author in Literary Fiction. Four years after burying his young wife, New York sales executive Christian Crews still can't move forward with his life. Day after day, treasured memories of his beloved Elyse continue to drift through his spirit like an endless procession of mournful ghosts. Chris wants to leave Manhattan-walk away from his job and the apartment he and Elyse once shared. He dreams of moving to New Hampshire, where he feels he just might have a chance of finding peace. But in his grieving mind, breaking away from those memories would be the same as abandoning Elyse-an unforgivable act of betrayal he could never live with. Then, on the fourth anniversary of Elyse's death, Chris makes two shocking discoveries, and a part of him begins to believe that she would want him to go on with his life. Two weeks later he makes the move to New Hampshire, and minutes after arriving in the small rural village of Mountain Step, he meets a beautiful local woman with mesmerizing gray eyes and a heart as big as the surrounding mountains. Beginning another emotional relationship may be the last thing on Chris's mind, but he soon finds himself falling for Gina Elkin, every bit as hard as she's fallen for him. Could there be a future for them? Will Elyse allow it? After all, she's still deep within Chris's heart-a place no one else has ever been.
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