ScienceDirect : offers more than a quarter of the world's scientific, medical and technical information online.
NII Scholarly and Academic Information Navigator (CiNii) : All of the full text articles incorporated in NII-ELS are available through CiNii along with bibliographical information on other academic papers.
Google Scholar : you can search across many disciplines and sources: peer-reviewed papers, theses, books, abstracts and articles, from academic publishers, professional societies, preprint repositories, universities and other scholarly organizations.
Sites of Academic societies
Sites about Plants
Thomas Schoepke Plant Image Gallery : The page of plant images. You can see a photo by clicking each family and taxon name.
Flora of Japan : is conducted by Japanese Society for Plant Systematist. You can search the details from a plant name.
The International Plant Names Index (IPNI) : is a database of the names and associated basic bibliographical details of all seed plants, ferns and fern allies. Its goal is to eliminate the need for repeated reference to primary sources for basic bibliographic information about plant names.
Sites about NMR
Welcome to SDBS : Integrated Spectral Data Base System for Organic Compounds. You can enter the query of NMR / MS spectrum data.
NMRShiftDB : is a web database for organic structures and their nuclear magnetic resonance (nmr) spectra. It allows for spectrum prediction (currently only for carbon) as well as for searching spectra, structures and other properties.