你好! Shipping to Taiwan with premium packaging for just NT$300 

Ship to
Taiwan
0

My Account

  • argentina
  • chile
  • colombia
  • españa
  • méxico
  • perú
  • estados unidos
  • internacional

menu

Select your country

Americas

Europe

Rest of the world

portada Aspects of Praematurity and Dysmaturity: Groningen 10-12 May 1967
Type
Physical Book
Publisher
Author
Language
English
Pages
368
Format
Paperback
Dimensions
22.9 x 15.2 x 2.0 cm
Weight
0.52 kg.
ISBN13
9789401034302
Categories

Aspects of Praematurity and Dysmaturity: Groningen 10-12 May 1967

Jonxis, J. H. P. ; Visser, H. K. A. ; Troelstra, J. A. (Author) · Springer · Paperback

Aspects of Praematurity and Dysmaturity: Groningen 10-12 May 1967 - Jonxis, J. H. P. ; Visser, H. K. a. ; Troelstra, J. a.

Cheaper New Book Imported to Taiwan
Delivery: 15 Sep - 24 Sep Shipping: 12 to 14 business days.
NT$ 1,989
Faster New Book Imported to Taiwan
Delivery: 03 Sep - 11 Sep Shipping: 4 to 5 business days.
NT$ 2,408
NT$ 1,989

Choose the list to add your product or create one New List

Go to My Wishlists
Calculate shipping cost

Synopsis "Aspects of Praematurity and Dysmaturity: Groningen 10-12 May 1967"

The concept of the foeto-placental unit as an integrated endocrine organ has been defined recently by many in vivo studies at the 17th- 20th week of gestation. A functioning foeto-placental unit is necessary for most of the increased oestrogen production of pregnancy and for the provision of glucocorticoids and aldosterone to the foetus. Neither the foetus nor the placenta alone have the necessary enzyme systems for the synthesis of these groups of steroids. However, when the foetus and placenta function as a unit, all of the enzyme systems are present for the synthesis of these steroids from circulating cholesterol. The placenta, but not the mid-gestation foetal adrenal, can synthesize physiologically significant amounts of pregnenolone from circulating cholesterol. Part of the pregnenolone is converted to progesterone in the placenta by the 3 -HSD system (absent in the foetus). The progesterone is transferred to the foetus where it is transformed by C-II, C-17, C-18 and C-21 hydroxylases (all absent in the placenta) to cortisol, corticosterone and aldosterone. Pregnenolone transferred from the placenta to the foetus undergoes 171X-hydroxylation, side- chain splitting and sulfurylation (absent in the placenta) and is converted to DHAS. The DHAS may undergo 161X-hydroxylation (absent in the placenta) in the foetal liver and be transported to the placenta as 161X-OH-DHAS. There it is subjected to a neutral steroid sulfatase (absent in the foetus) and is converted to oestriol by action of the 3 -HSD system and the aromatizing enzyme system.

Customers reviews

More customer reviews
  • 0% (0)
  • 0% (0)
  • 0% (0)
  • 0% (0)
  • 0% (0)

Frequently Asked Questions about the Book

Is the book original?

All books in our catalog are Original.

In what language is the book written?

The book is written in English.

What is the format of this book?

The binding of this edition is Paperback.

Questions and Answers about the Book

Do you have a question about the book? Login to be able to add your own question.

Opinions about Bookdelivery

More customer reviews