The CombiClover 500 Crystallization Plates utilize a patented sitting-drop well design. A central reservoir is connected to four satellite drop chambers via dedicated vapor diffusion channels to create a novel combinatorial "crystallization clover".

Each plate has 24 of the described clovers, providing 96 flat-bottom sitting drop chambers. The unique design allows four different crystallization experiments to occur within each clover providing maximum efficacy and conservation of crystallization solutions.

• Plate dimensions are 85.5mm x 127.8mm x 14.4mm
• Plates are compatible with SBS (Society for Biomolecular Screening) standard laboratory automated instrumentation.
• Drop chambers are 9mm apart and reservoir chambers are 18mm apart in both horizontal and vertical directions for easy use with multi-channel pipettors.
• The central reservoir volume is 500 microliters
• The satellite drop chamber volume is 10 microliters

This product was formerly called CombiClover Jr.

Abstract  Quantum chemistry method was used to calculate the geometry structure of heavy oil character molecule. The method to calculate the minimum cross-sectional diameter of heavy oil character molecule and to show the molecular dimension was brought forward, which was used to predict the minimum cross-sectional diameter of some typical heavy oil character molecules. It is shown that the theory calculated result was consistent with experimental date. The minimum cross-sectional diameters of Daqing first cut (DQ-fcut) , middle cut (DQ-mcut) and end cut (DQ-endcut) were 1.8703, 3.0080 and 3.4929nm, respectively, meaning that these kinds of heavy oil molecules are too big to enter the sieve pore of zeolites, so they could be only cracked on the surface of zeolite. These research results can offer some useful theory basis to the selection and synthesis of zeolites.