Hawaiian crab

Xu T, Cho IK, Wang D, Rubio FM, Shelver WL, Gasc AME, Li J, Li QX (2009) Suitability of magnetic particle immunoassay for the analysis of PBDEs in Hawaiian euryhaline fish and crabs in comparison with gas chromatography/electron capture detection-ion trap mass spectrometry. Environmental Pollution 157 417 22... 

Palytoxin from the Tahitian Palythoa has a molecular form of Cj29H22iN30j4 (Mj. 2659). On the other hand, palytoxin from P. toxica has a molecular form of C,29H223N3054 (M. 2611), with two possible structures (Fig. 5.1) that differ from the former in the C-55 hemiketal ring. Palytoxin from the Hawaiian P. tuberculosa is a mixture of the three palytoxins from the Tahitian Palythoa and P. toxica (Mooie and Bartolini 1981). The two components in palytoxin from the Okinawan P. tuberculosa (Mj. 2681 Macfarlane et al. 1980) may be the related C-54 ketal and hemiketal (Moore and Bartolini 1981). The palytoxin from P. caribaoreum has a molecnlar mass of 2680, while the palytoxin-like substance isolated from Lophozozymus pictor crab, which showed a very similar positive ion MS profile, was estimated to possess a molecular mass of 2681.0 Da (Lau et al. 1995). 

Scientists are examining the natural world to find supersensitive detectors because many organisms are sensitive to tiny amounts of chemicals in their environments—for example, the sensitive noses of bloodhounds. One of these natural measuring devices uses the sensory hairs from Hawaiian red swimming crabs, which are connected to electrical analyzers and used to detect hormones at levels as low as 10 g/L. 

Back in this mirror-image forest, you have just about figured it out, or so you think Sure, there exists some asymmetry in nature, like the Hawaiian hibiscus and the fiddler crab, but this mirror-image forest still looks the same as it did before this magical reversal, because we have found just as many sinistral as dextral forms. But wait, you suddenly come across a large number of honeysuckle plants, and a large number of snails. The honeysuckle plants are growing vertically all in the same... 

Figure 6.4. Earth from space, and its mirror image Figure 6.5. Planes of symmetry in plants and animals Figure 6.6. Two photographs of the Hawaiian hibiscus Figure 6.7. A fiddler crab...

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