Skip to main content Accessibility help
×

Temporary Disruption

We have implemented additional assurance measures to protect our systems.

As a result, we have suspended some of our systems and services. We apologise for any temporary disruption some customers may experience.

  1. Home
  2. Search

Refine search

Refine search

Access:
Content type:
Publication date:
Apply   From and To filters
Subject: Show more
Journals Show more
Publishers: Show more
Societies Show more
Series: Show more
Collections: Show more

Actions for selected content:

Select all | Deselect all
  • View selected items
  • Export citations
  • Download PDF (zip)
  • Save to Kindle
  • Save to Dropbox
  • Save to Google Drive

Save Search

You can save your searches here and later view and run them again in "My saved searches".

Please provide a title, maximum of 40 characters.
Cancel
×

8 results

  • Design of porous aluminum oxide ceramics using magnetic field-assisted freeze-casting

  • Said Bakkar, Jihyung Lee, Nicholas Ku, Diana Berman, Samir M. Aouadi, Raymond E. Brennan, Marcus L. Young
  • Journal:
    Journal of Materials Research / Volume 35 / Issue 21 / 16 November 2020
    Published online by Cambridge University Press:
    06 August 2020, pp. 2859-2869
    Print publication:
    16 November 2020

  • Magnetic field-assisted freeze-casting of porous alumina structures is reported. Different freeze-casting parameters were investigated and include the composition of the original slurry (Fe3O4 and PVA content) and the control of temperature during the free casting process. The optimum content of the additives in the slurry were 3 and 6 wt% for PVA and Fe3O4, respectively. These conditions provided the most unidirectional porous structures throughout the length of the sample. The sintering temperature was maintained at 1500 °C for 3 h. The application of a vertical magnetic field (parallel to ice growth direction) with using a cooling rate mode technique was found to enhance the homogeneity of the porous structure across the sample. The current study suggests that magnetic field-assisted freeze-casting is a viable method to create highly anisotropic porous ceramic structures.

  • Chapter 32 - Heterotopic pregnancy and assisted reproduction

  • from Section 4: - Early pregnancy after infertility treatment
  • Edited by Botros R. M. B. Rizk, University of South Alabama
  • Book:
    Ultrasonography in Reproductive Medicine and Infertility
    Published online:
    07 September 2011
    Print publication:
    25 March 2010, pp 271-275

  • Summary

    Over the last 25 years, progress in the field of assisted reproduction has paralleled that in ultrasonography. Normal fallopian tubes are not usually seen by ultrasound, though it is sometimes possible to visualize the fimbrial end within fluid in the pouch of Douglas. The ovaries are usually seen lateral to the uterus, in close relationship to the internal iliac vessels. They can be identified by their echogenic stroma and sonolucent follicles. A variety of ovarian reserve tests are used in routine clinical practice to assess a woman's ovarian performance prior to controlled ovarian hyperstimulation (COH) for in vitro fertilization (IVF). Transvaginal ultrasound-guided aspiration of ovarian follicles provides a safe and effective means of oocyte retrieval. Embryo transfer is a crucial step of IVF treatment. Ultrasound is a cornerstone of prevention and diagnosis of potential IVF complications such as ovarian hyperstimulation syndrome (OHSS) and multiple pregnancies.