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Toxic Heavy Metals in Different Brands of Beauty Products By AAS
ISBN: 9783659497681 / Angielski / Miękka / 108 str. Termin realizacji zamówienia: ok. 5-8 dni roboczych. Beauty creams and sun blocks are cosmetic products. The majority of creams and lotions are emulsions. An emulsion can be defined simply as two immiscible fluids in which one liquid is dispersed as fine droplets in the other. Beauty creams and sun blocks are widely used in Pakistan as well as all over the world due to look more beautiful, young, fair, wrinkle and spot free skin. Skin care products cause large number of common diseases such as cancer, hormonal disorders, chronic fatigue syndrome, immune disorders, heart disease and sexual problems. Skin cancer is exacerbated by toxic chemicals...
Beauty creams and sun blocks are cosmetic products. The majority of creams and lotions are emulsions. An emulsion can be defined simply as two immisci...
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cena:
223,20 |
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One Hundred Years after the Discovery of Radioactivity
ISBN: 9783486642520 / Angielski / Twarda / 412 str. Termin realizacji zamówienia: ok. 5-8 dni roboczych. From Wilhelm Conrad Rontgen's search for new kinds of radiation resulted the discovery of the natural radioactivity of uranium by Antoine Henry Becquerel in 1896. This event opened a new era of science that can be considered as the beginning of nuclear sciences. The findings of Pierre and Marie Curie of radium and polonium as useful radiation source subsequently opened the way to the first applications of radiation in medicine. Over the decades and still today radiation has found broad applications in many fields of science and technology. Not only chemistry, physics, biochemistry and...
From Wilhelm Conrad Rontgen's search for new kinds of radiation resulted the discovery of the natural radioactivity of uranium by Antoine Henry Becque...
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cena:
977,35 |
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Oxygenates by Homologation or Co Hydrogenation with Metal Complexes
ISBN: 9789401043786 / Angielski / Miękka / 227 str. Termin realizacji zamówienia: ok. 5-8 dni roboczych. The homogeneous catalytic hydrogenation of CO and the carbonylation and homologation of alcohols and their derivatives emerged nearly 40 years ago, in the U.S.A. and Germany. Since that time, the two topics have generally been reviewed separately, with no concern for their common aspects, in terms of both the chemical transformations involved, nor for the catalytic aspects, until Japanese workers, during the National C1 Chemistry Project, which ran from 1980 to 1987, unified both the scientific and technological approaches in the field. The literature from 1940--1980 has been well...
The homogeneous catalytic hydrogenation of CO and the carbonylation and homologation of alcohols and their derivatives emerged nearly 40 years ago, ...
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cena:
402,53 |
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Calixarenes 50th Anniversary: Commemorative Issue
ISBN: 9789401041188 / Angielski / Miękka / 418 str. Termin realizacji zamówienia: ok. 5-8 dni roboczych. We are proud to celebrate the 50th anniversary of the calixarenes. In 1944, Zinke and Ziegler proposed a cyclotetrameric structure for an oligomer extracted from the condensation product mixture obtained by reacting p-tert-butyl phenol with formaldehyde in the presence of sodium hydroxide.
Fifty years on, calixarenes are the basis of many different areas of chemical research, with development occurring at an increasing pace over the past decade in particular. The present volume does not provide an overview of all these developments, but is rather a celebration of some of the... We are proud to celebrate the 50th anniversary of the calixarenes. In 1944, Zinke and Ziegler proposed a cyclotetrameric structure for an oligomer ext...
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cena:
805,10 |
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Theoretical Aspects of Homogeneous Catalysis: Applications of AB Initio Molecular Orbital Theory
ISBN: 9789401042123 / Angielski / Miękka / 220 str. Termin realizacji zamówienia: ok. 5-8 dni roboczych. This publication is the first to present the quantitative application of quantum chemistry to organometallic reactions. Great progress has been made in recent years in the calculation of transition states of organometallic conversions in both homo and heterogeneous catalysis. This volume, which contains seven contributions by leading scientists, deals with key reactions of homogeneous catalysis including oxidative addition, migratory insertions, 2+2 additions, the Wacker reaction, and epoxidation. The book provides experimental chemists with an up-to-date overview of the state of the...
This publication is the first to present the quantitative application of quantum chemistry to organometallic reactions. Great progress has been made...
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cena:
603,81 |
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Catalytic Activation of Dioxygen by Metal Complexes
ISBN: 9789401052658 / Angielski / Miękka / 397 str. Termin realizacji zamówienia: ok. 5-8 dni roboczych. The activation of dioxygen by metal ions has both synthetic potential and biological relevance. Dioxygen is the cleanest oxidant for use in emission-free technologies to minimize pollution of the environment. The book gives a survey of those catalyst systems based on metal complexes which have been discovered and studied in the last decade. They activate molecular oxygen and effect the oxidation of various organic compounds under mild conditions. Much of the recent progress is due to a search for biomimetic catalysts that would duplicate the action of metalloenzymes. Mechanistic aspects are...
The activation of dioxygen by metal ions has both synthetic potential and biological relevance. Dioxygen is the cleanest oxidant for use in emission-f...
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cena:
805,10 |
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The Chemistry of Transition Metal Carbides and Nitrides
ISBN: 9789401071994 / Angielski / Miękka / 536 str. Termin realizacji zamówienia: ok. 5-8 dni roboczych. This book arose from a symposium titled 'Transition Metal Carbides and Nitrides: Preparation, Properties, and Reactivity' organized by Jae Sung Lee, Masatoshi Nagai and myself. The symposium was part of the 1995 Congress of Pacific Rim Chemical Societies, held in Honolulu, Hawaii between December 17-22, 1995. The meeting was the first major conference to exclusively address the theme of metal carbides and nitrides, and brought together many of the major researchers in the field. Over 50 scientists and engineers reported their latest findings in five sessions of presentations and discussions....
This book arose from a symposium titled 'Transition Metal Carbides and Nitrides: Preparation, Properties, and Reactivity' organized by Jae Sung Lee, M...
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cena:
1207,67 |
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Physics and Chemistry of the Fullerenes
ISBN: 9789401044264 / Angielski / Miękka / 343 str. Termin realizacji zamówienia: ok. 5-8 dni roboczych. In September 1985, in an attempt to simulate the chemistry in a carbon star, Harry Kroto, Bob Curl and Richard Smalley set up a mass spectrometry experiment to study the plasma produced by focusing a pulsed laser on solid graphite. Serendipitously, a dominant 720 amu mass peak corresponding to a C60 species was revealed in the time-of-flight mass spectrum of the resulting carbon clusters. It was proposed that this C60 cluster had the closed cage structure of a truncated icosahedron (a soccerball) and was named Buckminsterfullerene because geodesic dome concepts, pioneered by the architect...
In September 1985, in an attempt to simulate the chemistry in a carbon star, Harry Kroto, Bob Curl and Richard Smalley set up a mass spectrometry expe...
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cena:
201,24 |
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Luminescence of Lanthanide Ions in Coordination Compounds and Nanomaterials
ISBN: 9781119950837 / Angielski / Twarda / 384 str. Termin realizacji zamówienia: ok. 5-8 dni roboczych. This comprehensive book presents the theoretical principles, current applications and latest research developments in the field of luminescent lanthanide complexes; a rapidly developing area of research which is attracting increasing interest amongst the scientific community. Luminescence of Lanthanide Ions in Coordination Compounds and Nanomaterials begins with an introduction to the basic theoretical and practical aspects of lanthanide ion luminescence, and the spectroscopic techniques used to evaluate the efficiency of luminescence. Subsequent chapters introduce a variety of... This comprehensive book presents the theoretical principles, current applications and latest research developments in the field of luminescent lant... |
cena:
736,97 |
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Assessment of Chem.Spp.in Water/Sediments of Imo, QuaIboe&Cross Rivers
ISBN: 9783659194740 / Angielski / Miękka / 552 str. Termin realizacji zamówienia: ok. 5-8 dni roboczych. The Optimized BCR Sequential Extraction Procedure was used for sediments samples from three river systems (Imo River, Qua Iboe River and Cross River) for the determination Fe, Ni, Cr, Cd, As, Pb, and Zn. The trace metals were partitioned into four operationally defined chemical fractions: acid extractable, reducible, oxidizable and residual. The PHREEQC software was used for water samples. The Saturation Index (SI) results from PHREEQC software model revealed that some minerals such as Anglesite, Cerrusite, Chloropyromorphite (c), Chloropyromorphite (soil), Siderite, Laurinite and Smithsonite...
The Optimized BCR Sequential Extraction Procedure was used for sediments samples from three river systems (Imo River, Qua Iboe River and Cross River) ...
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cena:
379,75 |
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Synthesis Of Transition Metal Complexes Of Isoxazole Schiff Bases
ISBN: 9783659487880 / Angielski / Miękka / 164 str. Termin realizacji zamówienia: ok. 5-8 dni roboczych. Schiff bases occupy a pride place both in organic and inorganic chemistry, as they have wide applications in many biological aspects. Metal complexes of Schiff bases have occupied a central role in the development of coordination chemistry. Schiff base transition metal complexes are one of the most adaptable and thoroughly studied systems. Isoxazoles are biologically active and have considerable medicinal value. A wide range of biological activities of Isoxazole derivatives include pharmacological properties such as hypoglycemic, antiinflammatory, antibacterial, anticancer and also...
Schiff bases occupy a pride place both in organic and inorganic chemistry, as they have wide applications in many biological aspects. Metal complexes ...
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cena:
321,60 |
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La, Nd and Er complexes of Schiff bases derived from benzopyran-4-one
ISBN: 9783659488436 / Angielski / Miękka / 240 str. Termin realizacji zamówienia: ok. 5-8 dni roboczych. Schiff bases have played an important role in the development of coordination chemistry. The growing importance of the Schiff bases in modern coordination chemistry is attributable to recent observations about their antibacterial and antifungal properties. Lanthanide coordination compounds are the subject of intense research efforts owing to their unique structures and their potential applications. Accordingly, this book contains preparation and characterization of a series of Schiff bases derived from the condensation of benzopyran-4-one derivatives with aliphatic diamines (ethylenediamine...
Schiff bases have played an important role in the development of coordination chemistry. The growing importance of the Schiff bases in modern coordina...
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cena:
312,66 |
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Functional Molecular Silicon Compounds II: Low Oxidation States
ISBN: 9783319037332 / Angielski / Twarda / 232 str. Termin realizacji zamówienia: ok. 5-8 dni roboczych. The series Structure and Bonding publishes critical reviews on topics of research concerned with chemical structure and bonding. The scope of the series spans the entire Periodic Table and addresses structure and bonding issues associated with all of the elements. It also focuses attention on new and developing areas of modern structural and theoretical chemistry such as nanostructures, molecular electronics, designed molecular solids, surfaces, metal clusters and supramolecular structures. Physical and spectroscopic techniques used to determine, examine and model structures fall within the...
The series Structure and Bonding publishes critical reviews on topics of research concerned with chemical structure and bonding. The scope of the seri...
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cena:
805,10 |
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Rare Earths: New Research
ISBN: 9781626189966 / Angielski / Twarda / 289 str. Termin realizacji zamówienia: ok. 5-8 dni roboczych. |
cena:
955,01 |
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Concentration of iron in laterite soils
ISBN: 9783659372339 / Angielski / Miękka / 92 str. Termin realizacji zamówienia: ok. 5-8 dni roboczych. Iron is the single element used in industries in larger quantities than all the other metallic elements combined. This is because of the very wide applications of the metal in manufacture of machinery, vehicles and in building industry. Whereas the element occurs in more than 80 minerals, only a small number is important as a source of iron. However, even these must be concentrated to make them suitable for putting in a blast furnace. Since methods used for concentration are expensive, the study was meant to investigate on a cheaper technique of obtaining iron from heated laterites/charcoal...
Iron is the single element used in industries in larger quantities than all the other metallic elements combined. This is because of the very wide app...
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cena:
245,56 |
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Metal Hydrides
ISBN: 9781475758160 / Angielski / Miękka / 385 str. Termin realizacji zamówienia: ok. 5-8 dni roboczych. In the last five years, the study of metal hydrides has ex- panded enormously due to the potential technological importance of this class of materials in hydrogen based energy conversion schemes. The scope of this activity has been worldwide among the industrially advanced nations. There has been a consensus among researchers in both fundamental and applied areas that a more basic understanding of the properties of metal/hydrogen syster;, s is required in order to provide a rational basis for the selection of materials for specific applications. The current worldwide need for and interest in...
In the last five years, the study of metal hydrides has ex- panded enormously due to the potential technological importance of this class of materials...
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cena:
201,24 |
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Polyoxometalate Chemistry for Nano-Composite Design
ISBN: 9781475787184 / Angielski / Miękka / 235 str. Termin realizacji zamówienia: ok. 5-8 dni roboczych. Polyoxometalates are discrete early transition metal-oxide cluster anions and comprise a class of inorganic complexes of unrivaled versatility and structural variation in both symmetry and size, with applications in many fields of science. Recent findings of both electron-transfer processes and magnetic exchange-interactions in polyoxometalates with increasing nuclearities, topologies, and dimensionalities, and with combinations of different magnetic metal ions and/or organic moieties in the same lattice attract strong attention towards the design of nano-composites, since the assemblies of...
Polyoxometalates are discrete early transition metal-oxide cluster anions and comprise a class of inorganic complexes of unrivaled versatility and str...
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cena:
201,24 |
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Chemistry and Technology of Water-Soluble Polymers
ISBN: 9781475796636 / Angielski / Miękka / 358 str. Termin realizacji zamówienia: ok. 5-8 dni roboczych. To the biochemist, water is, of course, the only solvent worthy of consideration, because natural macromolecules exhibit their remarkable conformational properties only in aqueous media. Probably because of these remarkable properties, biochemists do not tend to regard proteins, nucleotides and polysaccharides as polymers in the way that real polymer scientists regard methyl methacrylate and polyethylene. The laws of polymer statistics hardly apply to native biopolymers. Between these two powerful camps, lies the No-man's land of water soluble synthetic polymers: here, we must also include...
To the biochemist, water is, of course, the only solvent worthy of consideration, because natural macromolecules exhibit their remarkable conformation...
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cena:
603,81 |
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Micelles: Theoretical and Applied Aspects
ISBN: 9781489907028 / Angielski / Miękka / 252 str. Termin realizacji zamówienia: ok. 5-8 dni roboczych. Almost thirty years ago the author began his studies in colloid chemistry at the laboratory of Professor Ryohei Matuura of Kyushu University. His graduate thesis was on the elimination of radioactive species from aqueous solution by foam fractionation. He has, except for a few years of absence, been at the university ever since, and many students have contributed to his subsequent work on micelle formation and related phenomena. Nearly sixty papers have been published thus far. Recently, in search of a new orientation, he decided to assemble his findings and publish them in book form for...
Almost thirty years ago the author began his studies in colloid chemistry at the laboratory of Professor Ryohei Matuura of Kyushu University. His grad...
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cena:
402,53 |
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Mechanisms of Inorganic and Organometallic Reactions: Volume 8
ISBN: 9781489916266 / Angielski / Miękka / 501 str. Termin realizacji zamówienia: ok. 5-8 dni roboczych. Mechanisms of Inorganic and Organometallic Reactions provides an ongoing critical review of the primary literature concerned with mechanisms of inorganic and organometallic reactions. The main focus is on reactions in solution, although solid-state and gas-phase studies are included where they provide relevant mechanistic insight. Each volume covers an eighteen-month literature period, and this, the eighth volume in the series, includes papers published during January 1990 through June 1991. Where appropriate, references to earlier reports and to specific sections in previous volumes are...
Mechanisms of Inorganic and Organometallic Reactions provides an ongoing critical review of the primary literature concerned with mechanisms of inorga...
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cena:
805,10 |
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