39 research outputs found
Impact of preoperative malnutrition, based on albumin level and body mass index, on operative outcomes in patients with pancreatic head cancer
Comparing Open and Closed Techniques of Frontalis Suspension with Silicone Rod for the Treatment Congenital Blepharoptosis
A BAFfling liver aspirate: Metastatic high grade SMARCA4 deficient undifferentiated gastroesophageal junction carcinoma masquerading as a hematolymphoid malignancy
Silicon in magnetite: High resolution microanalysis of magnetite-ilmenite intergrowths
Magnetite-ilmenite âoxidation-exsolutionâ intergrowths from an original titanomagnetite microphenocryst from an ash flow tuff unit have been studied using conventional transmission electron microscopy and analytical electron microscopy. Silicon has been found to be in solid solution in all of the magnetite studied and in some of the coexisting ilmenite. The average value in magnetite is 1.2 wt.% Si, equivalent to solid solution of 9 mole % Fe 2 SiO 4 . Silicon is also present in very small silicate inclusions and as unusual Si-rich domains of uncertain origin in magnetite. The inclusions and domains may be irregularly distributed through the magnetite in sizes well below those resolvable with the electron microprobe. Microprobe analyses for Si in magnetite generally reflect these heterogeneities in addition to a component presumably in solid solution. The petrologic implications of the data can be assessed only when relevant thermochemical data become available and the distribution of Si in magnetite is better understood.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/47334/1/410_2004_Article_BF00378006.pd