Mounted LithoLoops offer excellent reproducibility with standard distances from the base of the loop to the end of the mounting pin, making crystal centering easier. LithoLoops are mounted on a standard 18 mm stainless steel pin. The pin has an outside diameter of 0.635 mm to fit all available Cap mounting systems.Machine-made loops of precise and reproducible dimensions heralded a real breakthrough in cryocrystallography and have rapidly taken over as the new standard. Protein Wave Corp (Japan) were the first to develop a manufacturing process based on Lithography and subsequently further develop the material using a UV curing process to make a loop with almost zero background scatter.LithoLoops are exclusively licensed to Molecular Dimensions.Features of LithoLoops:

• Improved data collection statistics – Etched from polyimide resin yielding practically zero background diffraction.
• Save money and time – re-usable with precise and reproducible diameters allowing easy matching of loop size to crystal, one pack all the correct size.
• Easier Fishing – Fast and simple retrieval of crystals from drop, even in viscous solutions. Low hydrophobicity minimises volume of cryoprotectant retained.
• Best of both worlds – very strong yet flexible in the drop, rigidity increases upon freezing giving solid mechanical stability during data collection.
• Choice of size and shape – choose round, elliptical (for needles) or mesh (down to 20 micron) for fragile or micro-crystals.
• Litholoops come in packs of 20 (or 10 for the sample set).

Extend the lifetime of your loops! Read about our recommended cleaning procedure.

"For any lab preparing for their first trip to the beamline, this starting pack (MD7-212) is a must. You will never be stuck with the wrong loop sizes in the middle of data collection due to the wide selection of loops in the pack. The starter pack was great for data collection of different crystal sizes and morphologies. Also loops retained their shape and did not break after multiple uses and washes."Matt Dunne, ETH Zurich Re-order codes:MD7-130 for 0.02mm Round LitholoopsMD7-131 for 0.04mm Round LitholoopsMD7-132 for 0.06mm Round LitholoopsMD7-133 for 0.08mm Round LitholoopsMD7-134 for 0.1mm Round LitholoopsMD7-135 for 0.15mm Round LitholoopsMD7-136 for 0.2mm Round LitholoopsMD7-137 or 0.25mm Round LitholoopsMD7-138 for 0.3mm Round LitholoopsMD7-140 for 0.4mm Round LitholoopsMD7-142 for 0.5mm Round LitholoopsMD7-143 for 0.6mm Round LitholoopsMD7-144 for 0.7mm Round LitholoopsMD7-145 for 0.8mm Round LitholoopsMD7-147 for 1.0mm Round Litholoops 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.