Introduction: CM chondrites experienced relatively low-temperature aqueous alteration, at least some of which happened on their parent body. The conditions under which aqueous alteration occurred are: fluid temperatures of 0-25°C [1], from the time of asteroid formation up to 15 Myr [2-4] and mobility over scales of only tens of μm [5, 6]. Asteroid thermal models [7] have been successful in des...

Serpentine supravenous hyperpigmentation is a peculiar cutaneous eruption that follows the path of vein after intravenous injection of the chemotherapeutic agent. The lesions gradually resolve spontaneously if administration of the offending agent is stopped through the affected limb. Drugs such as 5-fluorouracil, docetaxel, vinorelbine, hydroxychloroquine, fotemustine, and minocycline are impl...

To cite: Grandhi R, Williamson RW, Zwagerman NT, et al. BMJ Case Rep Published online: [please include Day Month Year] doi:10.1136/bcr-2015212019 DESCRIPTION A 34-year-old man with a history of seizures presented after a generalised seizure. An MRI of the brain and MR angiogram of the brain (figure 1) were performed, demonstrating a partially thrombosed, giant intracranial aneurysm involving th...

This paper describes the design and analysis of a particular micro-electromechanical-system (MEMS) micromirror device that can be used for an optical switching application. Analytical expressions for electrostatic torque and restoring torque of serpentine springs are derived. The performance of the proposed structure is compared with the existing structures having straight torsional beams. The ...

Analytical models to describe coupling between different directions of motion are derived using energy methods and verified for the U-spring, crab-leg spring and the serpentine spring. Finite element analyses (FEA) are done for a range of spring dimensions for each spring type in order to verify the models and determine the validity range. The models for the serpentine spring are then incorpora...

This article presents a historical review of mathematics education since the late 1950s in the United States. Three themes are used to organize the literature reviewed in the article: (a) broad sociopolitical forces, particularly highly publicized educational policy statements; (b) trends in mathematics research; and (c) theories of learning and instruction. At times, these themes coincide, as ...

We analyzed botanical, geologic, and climatic data in an effort to understand why there are many more serpentine endemics—i.e., plant species restricted to ultramafic substrates—in some regions of California than in others. We found that, in addition to elevational range (which subsumed the effect of serpentine area) and annual rainfall, the age of exposure of serpentine explained significant g...

Compositional variations of talc in peridotites and serpentinites could have significant implications for modeling geochemical cycles involving the upper mantle but been scarcely studied. We analyzed chemical compositions prograde retrograde associated minerals thermally metamorphosed from Southwest Japan. The has Si, Al, Mg, Fe, Na contents. Most Fe indicate mechanical mixing with serpentine c...

Serpentine cord formation in BACTEC 12B medium was evaluated as a rapid method for the presumptive identification of M. tuberculosis complex. Kinyoun acid-fast stained smears were prepared from 666 positive BACTEC 12B bottles and examined for the presence or absence of serpentine cording. Cord formation had a sensitivity, specificity, positive predictive value, and negative predictive value of ...

The serpentine minerals lizardite, polyhedral serpentine, chrysotile, antigorite and 15-sector 30-sector polygonal have been studied by micro-Raman spectroscopy, using selected samples, that had previously characterized. appropriate crystal orientations were determined optical microscopy of petrographic sections. Oriented spectra, obtained Nd-YAG green laser radiation (532 nm), deconvolved, ext...