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The elements
\"A spectacular visual guide to the more than 100 elements that make up you and everything around you\"--P. [4] of cover.
Book
Aktivierung von Elementen der Gruppe 15 sowie Darstellung neuer Lanthanoid-Sandwichverbindungen
Diese Dissertationsschrift beschäftigt sich einerseits mit der Aktivierung von Elementen der Gruppe 15 mittels niedervalenter metallorganischer Vorstufen. Im Fokus steht hierbei die Aktivierung von nanopartikulärem Arsen mit mono- und divalenten Aluminiumverbindungen sowie nicht-klassischen, divalenten Lanthanoidkomplexen zur Darstellung von 4f-Element Polyarseniden. Darüber hinaus wird über die Aktivierung von weißem Phosphor mit verschiedenen Lanthanoid-Vorstufen berichtet, welche zur Darstellung von 4f-Element-Polyphosphiden dient. Ein zweites Themengebiet dieser Dissertation behandelt die Synthese und Charakterisierung von Lanthanoid-Sandwichverbindungen. Dabei wird zum einen die Synthese von Lanthanoid-Koordinationspolymeren auf Basis eines disilylsubstituierten Cyclooctatetraendiid-Liganden beschrieben, zum anderen wird das Cycloheptatrienyl-Trianion als verbrückender Ligand in der Synthese von heteroleptischen Lanthanoid-Multideckerkomplexen eingesetzt. Neben den strukturellen Eigenschaften dieser neuen metallorganischen Verbindungen, wurden diese auf ihr Verhalten als Einzelmolekülmagnet (SMM) sowie auf ihre lumineszente Eigenschaften untersucht.
eBook
Exploring the mysteries of the elements
Every element is featured, their vital statistics given, their main compounds and uses explored, and their fascinating histories told.
Book
Nitrogen, phosphorus, and potassium fertilization to achieve expected yield and improve yield components of mung bean
Mung bean (Vigna radiata L.) is an important edible bean in the human diet worldwide. However, its growth, development, and yield may be restricted or limited by insufficient or unbalanced nitrogen (N), phosphorus (P), and potassium (K) fertilization. Despite this, there are few long-term studies of the effects of varying levels of N, P, and K combined fertilizers and the optimal fertilization for improving mung bean yield and quality. This study was conducted to optimize the fertilization strategies for high yield and to improve yield components (pods per plant, seeds per pod, and 100-seed weight) in the Bailv9 mung bean cultivar, 23 treatments were tested in 2013-2015, using a three-factor (N, P, and K fertilizers), five-level quadratic orthogonal rotation combination design. Our studies showed that, the N, P, and K fertilizers significantly influenced the pods per plant and yield, which increased and then decreased with the increasing N, P, and K fertilizers. The 100-seed weight was significantly affected by the N and P fertilization, and it was increased consistently with the increasing N fertilizer, and decreased significantly with the increasing P fertilizer. Whereas, the seeds per pod significantly decreased with the increasing N and K fertilizers, and the P fertilizer had no significant effect on it. The NP interaction had a significant effect on yield and pods per plant at high N levels, while the NK interaction had a significant but opposite effect on yield at low N levels. The optimal fertilization conditions to obtain yield >2,141.69 kg ha-1 were 34.38-42.62 kg ha-1 N, 17.55-21.70 kg ha-1 P2O5, and 53.23-67.29 kg ha-1 K2O. Moreover, the optimal N, P, and K fertilization interval to achieve pods per plant > 23.41 and the optimal N fertilization to achieve a 100-seed weight > 6.58 g intersected with the interval for yield, but the seeds per pod did not. The fertilizer ratio for the maximum yield was N:P2O5:K2O = 1:0.5:1.59. Following three years experimentation, the optimal fertilization measures were validated in 2016-2017, the results indicated that yield increased by 19.6% than that obtained using conventional fertilization. The results of this study provide a theoretical basis and technical guidance for high-yield mung bean cultivation using the optimal fertilization measures.
Journal Article
The elements : a visual exploration of every known atom in the universe
The elements are what we - and everything around us - are made of. But how many elements have you seen in their pure, raw, uncombined form? This book presents photographic representations of the 118 elements in the period table, along with facts, figures and stories about each one.
Book
Elements
\"Elements create everything around us, from the air we breathe to our very bodies. Some elements are abundant, such as hydrogen and carbon, while others are rare or only created in laboratories! How elements join to create compounds--and the matter around us--is an amazing discovery that scientists are still investigating. Readers will appreciate the accessible look at elements in this intriguing book, which includes comprehensible fact boxes, helpful diagrams, and essential elementary chemistry facts.\"-- Provided by publisher.
Book
WHO handbook on indoor radon : a public health perspective
\"The WHO Handbook on Indoor Radon\" is a key product of the WHO International Radon Project, which was launched in 2005. The \"Handbook\" focuses on residential radon exposure from a public health point of view and provides detailed recommendations on reducing health risks from radon and sound policy options for preventing and mitigating radon exposure. The material in the \"Handbook\" reflects the epidemiological evidence that indoor radon exposure is responsible for a substantial number of lung cancers in the general population. The material is organized into six chapters, each introduced by key messages. Usually, technical terms are defined the first time they are used, and a glossary is also included. Information is provided on the selection of devices to measure radon levels and on procedures for the reliable measurement of these levels. Discussed also are control options for radon in new dwellings, radon reduction in existing dwellings as well as assessment of the costs and benefits of different radon prevention and remedial actions. Also covered are radon risk communication strategies and organization of national radon programs.This publication is intended for countries planning to develop their national radon programs or extend such activities, as well as for stakeholders involved in radon control such as the construction industry and building professionals.The overall goal of this \"Handbook\" is to provide an up-to-date overview of the major aspects of radon and health. It does not aim to replace existing radiation protection standards, rather it emphasizes issues relevant to the comprehensive planning, implementation and evaluation of national radon programs.
eBook