40 research outputs found
Observation of out-of-plane vibrations in few-layer graphene
Full text linkWe report the observation of layer breathing mode (LBM) vibrations in
few-layer graphene (FLG) samples of thickness from 2 to 6 layers, exhibiting
both Bernal (AB) and rhombohedral (ABC) stacking order. The LBM vibrations are
identified using a Raman combination band lying around 1720 cm-1. From double
resonance theory, we identify the feature as the LOZO' combination mode of the
out-of-plane LBM (ZO') and the in-plane longitudinal optical mode (LO). The
LOZO' Raman band is found to exhibit multiple peaks, with a unique line shape
for each layer thickness and stacking order. These complex line shapes of the
LOZO'-mode arise both from the material-dependent selection of different
phonons in the double-resonance Raman process and from the detailed structure
of the different branches of LBM in FLG.Comment: 17 pages, 7 figures, supplemental material include
Chromosomes analysis of human preimplantation embryos by fluorescent in situ hybridization.
No full textEffect of post-ovulatory age and calcium in the injection medium on the male pronucleus formation and metaphase entry following injection of human spermatozoa into golden hamster oocytes.
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Triple colour fluorescent in-situ hybridization for chromosomes X, Y and 1 on spare human embryos.
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Prospective randomized study comparing human serum albumin with fetal cord serum as protein supplement in culture medium for in-vitro fertilization.
No full textProspective randomized study comparing human serum albumin with fetal cord serum as protein supplement in culture medium for in-vitro fertilization
No full textIn-vitro maturation of human germinal vesicle stage oocytes: role of cumulus cells and epidermal growth factor in the culture medium.
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