The heyday of paleontology in China

<正>Life is the most exquisite and splendid natural outcome on our planet.Life has arisen as an evolutionary experiment of the continually and erratically changing earth system that has persisted for the 4.5 billion years since the formation of this planet.he enormous biodiversity we see today represents a small fraction of the life that has ever existed on earth.As the‘luckiest’and most     

The heyday of paleontology in China

<正>Life is the most exquisite and splendid natural outcome on our planet.Life has arisen as an evolutionary experiment of the continually and erratically changing earth system that has persisted for the 4.5 billion years since the formation of this planet.he enormous biodiversity we see today represents a small fraction of the life that has ever existed on earth.As the‘luckiest’and most     

Environmental chemistry: the earth-air-water factory

The earth—with its attendant atmosphere and hydrosphere, its vegetation and animal population—forms an immensely complicated dynamic system which defies detailed analysis. Nevertheless, models based on broad generalisations can be very informative. This article¹ reviews the lessons that can be learnt by regarding the whole earth-air-water system as a gigantic chemical factory.     

Clinical chemistry and laboratory medicine in Croatia: regulation of the profession

Heterogeneity exists across Europe in the definition of the profession of clinical chemistry and laboratory medicine and also in academic background of specialists in this discipline. This article provides an overview of the standards of education and training of laboratory professionals and quality regulations in Croatia. Clinical chemistry in Croatia is almost exclusively practiced by medical biochemists. Although term Medical biochemist often relates to medical doctors in other European countries, in Croatia medical biochemists are not medical doctors, but university degree professionals who are qualified scientifically. Practicing the medical biochemistry is regulated by The Health Care Law, The Law of the Medical Biochemistry Profession and The Law of the State and Private Health Insurance. According to the law, only medical biochemists are entitled to run and work in the medical biochemistry laboratory. University degree is earned after the 5 years of the studies. Register for medical biochemists is kept by the Croatian Chamber of Medical Biochemists. Licensing is mandatory, valid for 6 years and regulated by the government (Law on the Health Care, 1993). Vocational training for medical biochemists lasts 44 months and is regulated by the national regulatory document issued by the Ministry of Health. Accreditation is not mandatory and is provided by an independent, non-commercial national accreditation body. The profession has interdisciplinary character and a level of required competence and skills comparable to other European countries.     

Translating textbooks: Russian, German, and the language of chemistry

Using the cases of three Russian chemistry textbooks from the 1860s--authored by Freidrich Beilstein, A. M. Butlerov, and D. I. Mendeleev--this essay analyzes their contemporary translation into German and the implications of their divergent histories for scholars' understanding of the processes of credit accrual and the choices of languages of science.     

The chemistry of the stratosphere and its pollution

In recent years, there has been growing concern about the possible consequences—for health and climate—of the depletion of the ozone in the atmosphere by the cumulative effects of aerosol propellents and the exhaust fumes of supersonic aircraft. This review shows that while the basic chemical reactions involved are relatively simple, the assessment of their consequences demands fuller knowledge of atmospheric processes and of the biological effects of prolonged exposure to intensified ultraviolet radiation.     

不变集合和解的真空隔离

这篇文章利用位势井族理论,研究了整体解的不变性,进而研究了解的真空隔离现象。在本文中将真空隔离现象的条件进行了推广和改进,得出了新的结论。这些结论对研究Sobolev空间中解的分布情况有很大帮助。     

Green chemistry: a tool for the sustainable development of the chemical industry

<正>Most manufactured products involve one or more chemical processes.We cannot imagine what our life will be like without the products produced by the chemical industry.However,on average,only a small proportion of the resources we take from the Earth is converted into the desired products in current chemical processes,and large amounts of wastes and hazardous materials are generated.How to supply humanity with enough food,