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Handbook of Fluorescent Probes and Research Chemicals(部分免費(fèi))
【數(shù)據(jù)內(nèi)容】
The Handbook of Fluorescent Probes and Research Chemicals contains up-to-date background and technical information on Molecular Probes complete product line. This Web Edition of the Handbook is an updated version of the Seventh Edition.

ECDYBASE (The Ecdysone Handbook)(免費(fèi))
The " Ecdysone Handbook " was originally created by René Lafont and Ian D. Wilson and published in 1992 by the Chromatographic Society (Nottingham, U.K.). Its aim was to provide general data on all natural ecdysteroids described so far. Each data sheet contained (whenever available) spectroscopic (UV, IR, MS and NMR) and chromatographic data together with a few selected general references. As the ecdysteroid family continued to increase, a second enlarged edition was published in 1996, but the number of compounds is still growing (more than 300 compounds were described at the onset of year 2000).

WebElements periodic table of the elements
一個(gè)詳盡的元素周期表，有每種元素各項(xiàng)數(shù)據(jù)的介紹，并配有相關(guān)照片。 Internet和世界上最好的元素周期表。 WebElements is rated as Best of the Web.

The Periodic Table of the Elements on the Internet
在線元素周期表。提供了109個(gè)元素的多種性質(zhì)，包括基本信息（名稱、原子序數(shù)、物理性質(zhì)等）、原子結(jié)構(gòu)（電子排布）、同位素、事實(shí)（發(fā)現(xiàn)歷史等）和相關(guān)鏈接（提供進(jìn)一步信息的網(wǎng)站）。特別之處是提供了多種顯示周期表的選擇，分為兩大類，包括在周期表上首先顯示的性質(zhì)（名稱、原子序數(shù)、發(fā)現(xiàn)時(shí)間等）和按類型（堿金屬、鹵素等），以便適合于不同的需要。

Chemicool Periodic Table
一個(gè)元素周期表，提供103個(gè)元素的一般、狀態(tài)、能量（第一電離能等）、電子價(jià)態(tài)、特征、反應(yīng)情況、傳導(dǎo)性等性質(zhì)。