Dear Yang Gan,
You are absolutely right, that the moisture content of the material plays a significant role and that it should be specified for a density/specific gravity value of a material. We currently state either the actual moisture content or that the material was
wet/green or dry, when the density was measured.
In general, I agree that measuring the densities of materials is a problem, which can be solved. One of the difficulties in the materials listed in my earlier email is, however, to ensure measurements at a well defined moisture content: as a traditional
metals research institute, we are neither equipped nor allowed to work with fresh tissues, particularly those of human origin. And even if all the other tissues (bladder, cervix, prostrate,etc.) would be available to us, the separation of Abductin, Elastin,
Resilin etc. would be a rather elaborate task
Therefore, I am extremely grateful for all the help you might be able to give in my quest for densities.
Cherio,
Ulrike Wegst
* Abductin
* Aorta (= Artery in general?)
* Artery (= Aorta?)
* Bladder
* Bryozans
* Cellulose microfibrils
* Cervix
* Cornea
* Echinoids
* Egg shell
* Elastin
* Esophagus
* Feather
* Haversian System
* Horn
* Laminar bone
* Leaf bundle
* Ligament
* Prostrate
* Rectum
* Resilin
* Spider Frame Silk (same as Viscid Silk?)
* Wool (1.31-1.32Mg/m^3?)
Yang Gan schrieb:
> I think a student can measure the density of all substances in just a few days. By the way, I'm wondering whether it is meaningful to talk about the density of one material (specifically soft materials) without reference to its state (water percent.....).
> ÿÿÿÿÿ
>
> ---------------------
> Dr Yang Gan
> Department of Materials Physics and Chemistry
> University of Science and Technology Beijing
> 30 Xue yuan Rd.
> Beijing 100083
> P. R. China
> Tel: 86-10-62334499
> Fax: 86-10-62332345
> ÿÿÿÿÿ
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