Water-Induced Changes in Structure and Properties of Gel-Spun Polyvinylalcohol Fibers

Author(s):  
R. Huisman ◽  
G. J. Jongerden
2012 ◽  
Vol 53 (6) ◽  
pp. 1154-1158 ◽  
Author(s):  
Wei-Luen Chen ◽  
Nai-Yen Fan ◽  
Jing-Wei Lee ◽  
Ruey-Mo Lin ◽  
Chien-Ping Ju ◽  
...  

2011 ◽  
Vol 335-336 ◽  
pp. 908-911
Author(s):  
Yan Long Ma ◽  
Jing Xin Zhu ◽  
Hui Li Shao ◽  
Xue Chao Hu

The as-spun fibers, which be produced by dry spinning technique, were treated with methanol solution. The results showed that the morphology, structure and mechanical properties of the as-spun fibers had changed. Before methanol treatment,the as-spun fiber had a smooth surface, after methanol treatment, the fiber exhibited rough surface and banded features along the fiber axis. The structure of the as-spun fibers changed from random-coil or silk I conformation to silk II conformation and the breaking intensity of the as-spun fibers were improved after methanol treatment. Compared with degummed silk fibers, the fibers treated with methanol had higher module, but the breaking elongation was lower, the fibers were still brittle.


2009 ◽  
Vol 106 (11) ◽  
pp. 113710 ◽  
Author(s):  
Kongping Wu ◽  
Shulin Gu ◽  
Kun Tang ◽  
Shunming Zhu ◽  
Mingxiang Xu ◽  
...  

2018 ◽  
Vol 97 (13) ◽  
Author(s):  
D. Zimmer ◽  
J. Ruiz-Fuertes ◽  
W. Morgenroth ◽  
A. Friedrich ◽  
L. Bayarjargal ◽  
...  

2011 ◽  
Vol 130 (1-2) ◽  
pp. 303-308 ◽  
Author(s):  
Chien-Ping Ju ◽  
Sen-Hsiang Hung ◽  
Chang-Keng Chen ◽  
Wei-Luen Chen ◽  
Jing-Wei Lee ◽  
...  

Author(s):  
E. Knapek ◽  
H. Formanek ◽  
G. Lefranc ◽  
I. Dietrich

A few years ago results on cryoprotection of L-valine were reported, where the values of the critical fluence De i.e, the electron exposure which decreases the intensity of the diffraction reflections by a factor e, amounted to the order of 2000 + 1000 e/nm2. In the meantime a discrepancy arose, since several groups published De values between 100 e/nm2 and 1200 e/nm2 /1 - 4/. This disagreement and particularly the wide spread of the results induced us to investigate more thoroughly the behaviour of organic crystals at very low temperatures during electron irradiation.For this purpose large L-valine crystals with homogenuous thickness were deposited on holey carbon films, thin carbon films or Au-coated holey carbon films. These specimens were cooled down to nearly liquid helium temperature in an electron microscope with a superconducting lens system and irradiated with 200 keU-electrons. The progress of radiation damage under different preparation conditions has been observed with series of electron diffraction patterns and direct images of extinction contours.


Author(s):  
Sarah A. Luse

In the mid-nineteenth century Virchow revolutionized pathology by introduction of the concept of “cellular pathology”. Today, a century later, this term has increasing significance in health and disease. We now are in the beginning of a new era in pathology, one which might well be termed “organelle pathology” or “subcellular pathology”. The impact of lysosomal diseases on clinical medicine exemplifies this role of pathology of organelles in elucidation of disease today.Another aspect of cell organelles of prime importance is their pathologic alteration by drugs, toxins, hormones and malnutrition. The sensitivity of cell organelles to minute alterations in their environment offers an accurate evaluation of the site of action of drugs in the study of both function and toxicity. Examples of mitochondrial lesions include the effect of DDD on the adrenal cortex, riboflavin deficiency on liver cells, elevated blood ammonia on the neuron and some 8-aminoquinolines on myocardium.


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