Verrucous Carcinoma of the Esophagus

Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/75147/1/j.1572-0241.1984.tb11856.x.pd

Duodenal Ulcer, Hepatic Abscesses, and Fatal Hemobilia with Behcet's Syndrome: A Case Report

Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/72312/1/j.1572-0241.1982.tb05907.x.pd

Primary mucinous adenocarcinoma of renal pelvis in solitary pelvic kidney

Mucinous adenocarcinoma of the renal pelvis is a rare tumor. We report the case of a fifty-three-year-old man with this unusual cancer and review the literature. Usual features of this tumor include long duration of symptoms, an association with calculi and hydronephrosis, and a preoperative appearance of an inflammatory condition.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/31071/1/0000748.pd

Periosteal bone apposition in chondroblastoma

Periosteal bone apposition in chondroblastoma of long bones is more frequent than generally recognized. This should not cause confusion in differential diagnosis. The finding does not seem to have prognostic significance.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/46809/1/256_2004_Article_BF00350592.pd

Intradural extramedullary ganglioneuroma: Case report and review of the literature

The authors present a unique case of an intradural extramedullary ganglioneuroma in the thoracic spine of an adult. Intraspinal ganglioneuromas are rare, benign tumors of sympathetic nervous tissue origin, but exclusively intradural ganglioneuromas have not been reported.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/30177/1/0000562.pd

The preservation of erythrocytes at liquid nitrogen temperatures with hydroxyethyl starch: the removal of hydroxyethyl starch from erythrocytes after thawing

Packed human erythrocytes were frozen in liquid nitrogen using hydroxyethyl starch as a cryoprotective agent. Upon thawing, the cells were washed with a balanced salt solution. The washed cells were stable when resuspended in 0.154 n NaCl. The postthaw saline stability approximated the total recovery after washing the cells. Intracellular potassium loss was 15% immediately postthaw, and an additional 15% loss occurred after washing. These results indicate that HES can be removed from frozen-thawed cells by washing, and that freezing erythrocytes protected by HES does not result in significant losses of intracellular potassium.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/33516/1/0000014.pd

Pseudolymphoma of colon

A case of pseudolymphoma of the colon is reported. Radiographically and endoscopically the lesion could not be conclusively distinguished from malignant neoplasm, particularly lymphoma or segmental colitis, thus necessitating right hemicolectomy. Careful histological examination established the diagnosis of pseudolymphoma with pathologic features identical to the focal form of pseudolymphoma more commonly observed in the stomach.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/48154/1/261_2005_Article_BF01948094.pd

Large unit red cell cryopreservation with hydroxyethyl starch

Full units of red blood cells frozen with 14% hydroxyethyl starch (HES) yield cell recoveries near 97% and saline stabilities greater than 80%. Potassium leaves the cells during the freeze-thaw cycle and increases the extracellular concentration of this ion to near 35 meq/l. Unwashed cells (those with plasma present) and saline washed cells yield similar results. Storage of the thawed red cells at 4 [deg]C for up to 48 hr causes little change in the cells.Examination by electron microscopy of samples from thawed units reveals some red cells with portions of their membrane missing. We believe this represents damage from the freeze-thaw cycle and also that all free supernatant hemoglobin does not arise from completely lysed cells.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/21672/1/0000060.pd

Red cells preserved with 10% hydroxyethyl starch: Effect of prefreeze washing

Prefreeze washing of red cells with saline and other wash solutions before freezing with 10% hydroxyethyl starch does not yield an improved product after thawing. The saline stabilities and cell recoveries are reduced and the level of supernatant hemoglobin increased. These data further support the use of 14% as the most acceptable concentration of hydroxyethyl starch for cryopreservation of red cells.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/21984/1/0000394.pd

CO(2)hydrogenation using bifunctional catalysts based on K-promoted iron oxide and zeolite: influence of the zeolite structure and crystal size

[EN] In the present manuscript, the influence of the zeolite structure and crystal size on bifunctional tandem catalysts combining K-promoted iron oxide (K/Fe3O4) with different zeolites has been studied for the CO(2)hydrogenation reaction at 320 degrees C and 25 bar. First, to evaluate the influence of the zeolite structure on CO(2)conversion, three different zeolite topologies have been evaluated (BEA, MFI and CHA) with similar Si/Al molar ratios. The combination of K/Fe(3)O(4)with MFI maximizes the formation of aromatic products, while its combination with CHA and BEA increases the C-1-C(4)gas fractions, with a high olefin selectivity. In addition, aromatics and aliphatic hydrocarbons are present in the condensed liquids of the tandem catalysts containing BEA, while no aromatics are observed for those with CHA. These different product selectivities can be ascribed to the different consecutive reactions within the three zeolites, where MFI favors the aromatization of alkenes, and BEA and CHA favor oligomerization/cracking reactions leading to an increase of light olefin yield. Second, the evaluation of the nanosized form of the three proposed zeolite frameworks has also been carried out. The reduction of the particle size allows for increasing light olefin selectivity in all cases as compared to zeolites with larger crystals. Shorter intracrystalline diffusion paths facilitate the egression of light olefins before being involved in consecutive oligomerization reactions. In the particular case of the tandem catalysts with nanosized MFI zeolites, the C-2-C(4)fraction and its olefinicity are increased while maintaining the overall aromatic selectivity comparable to that obtained with micron-sized MFI zeolites.This work was supported by the Spanish Government through "Severo Ochoa" (SEV-2016-0683, MINECO) and RTI2018-101033-B-I00 (MCIU/AEI/FEDER, UE), by the Fundacion Ramon Areces through a research contract (CIVP18A3908) and by Generalitat Valenciana (AICO/2019/060). A. R. F. acknowledges the Spanish Government-MINECO for a FPU scholarship (FPU2017/01521). The Electron Microscopy Service of the UPV is acknowledged for their help in sample characterization.García-Hurtado, E.; Rodríguez-Fernández, A.; Moliner Marin, M.; Martínez, C. (2020). CO(2)hydrogenation using bifunctional catalysts based on K-promoted iron oxide and zeolite: influence of the zeolite structure and crystal size. 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