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An Unusual Case of Extra-Enteric Blastocystosis in the Uterine Cervix
Yolanda Escutia-Guzman,Williams Arony Martinez-Flores,Joel Martinez-Ocana,Ramon Martinez-Pimentel,Marisol Benitez-Ramirez,Fernando Martinez-Hernandez,Sara Arroyo-Escalante,Mirza Romero-Valdovinos,Guad 대한기생충학열대의학회 2020 The Korean Journal of Parasitology Vol.58 No.5
김부근,Buhan Song,조현구,Trevor Williams,Carlota Escutia 한국지질과학협의회 2017 Geosciences Journal Vol.21 No.1
On the basis of the variations of sediment properties such as biogenic opal, grain size, natural gamma radiation (NGR), and clay mineralogy, we differentiate two types of late Neogene marine sediments that record paleoclimate changes associated with the growth and retreat of the East Antarctic Ice Sheet (EAIS) and associated changes in sea ice cover. The first type of sediments are massive muds characterized by high biogenic opal (30~55%), low NGR (15~30 counts per second (cps)), large mean grain size (>8.3 μm), and low smectite/(illite + chlorite) [S/(I + C)] ratios (<~0.2). We interpret these sediments as the result from deposition by hemipelagic sedimentation during interglacial conditions. In contrast, the second type of sediments are laminated muds characterized by low biogenic opal (5~7%), high NGR (45~67 cps), small mean grain size (<6.3 μm), and high S/(I + C) ratios (>~0.2). We interpret these sediments as the result from deposition by either turbiditic or contouritic processes during glacial conditions. All these sediment properties indicate that the Wilkes Land continental rise recorded late Neogene paleoclimatic changes in terms of surface water productivity, sediment provenance and transport pathway, and depositional processes that are related to the growth and retreat of EAIS. In addition, the decreased maxima of biogenic opal content at Hole U1359A highlights the temporal climatic change between the late Pliocene (~2.0 Ma to ~3.7 Ma) and the early Pliocene to late Miocene (~3.7 Ma to ~6.3 Ma), confirming the important role of sea ice to the surface water productivity associated with the global cooling trend in the East Antarctica.