organic materials
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2022 ◽  
Vol 116 ◽  
pp. 198-208
Author(s):  
Ying Guo ◽  
Yuzhen Ye ◽  
Feng Zhu ◽  
Rui Xue ◽  
Xianchao Zhang ◽  
...  

2022 ◽  
Vol 170 ◽  
pp. 104284
Author(s):  
Chidozie J. Oraegbunam ◽  
Sunday E. Obalum ◽  
Toshihiro Watanabe ◽  
Yvonne M. Madegwa ◽  
Yoshitaka Uchida

Author(s):  
Sharmin Akter Chowdhury ◽  
Aya Kaneko ◽  
Md Zakaria Ibne Baki ◽  
Chikako Takasugi ◽  
Natsumi Wada ◽  
...  

Author(s):  
Ananda Maulidha Kusumastuti ◽  
Adik Roni Setiawan ◽  
Asalina Putri Agung Shaliha ◽  
Deden Eko Wiyono ◽  
Achmad Ferdiansyah Pradana Putra

<p><em>The number of bone damage in Indonesia continues to increase. Bone implant is one of the medical treatment methods performed on bone damage. Organic and non-organic materials can be used as bone implants. Non-organic materials are stronger, but not biocompatible, while organic materials are biocompatible, but brittle. The addition of polycaprolactone polymer (PCL) can increase the mechanical strength of 3D printing bone implant filaments. Extruder melting temperature is one of the factors that affect the quality of PCL-HAp filaments for bone implants. Studies related to temperature variations in PCL-HAp materials have not been widely studied. Therefore, it is necessary to characterize 3D printing filaments with variations in the melting temperature of the extruder as bone implants from mussel shells with temperature variables of 65<sup>o</sup>C, 75<sup>o</sup>C, and 85<sup>o</sup>C. From this study, the optimum point was found at the melting extruder temperature of 75<sup>o</sup>C with the results of a diameter of 1.810 and mechanical strength which showed an increase in tensile strength and Young's modulus of PCL-HAp composite in all variables compared to pure PCL. The SEM test showed a rough surface on the filaments that could increase the proliferation and adhesion of good cells for the growth of bone tissue.</em></p>


CrystEngComm ◽  
2022 ◽  
Author(s):  
Angelo Gavezzotti ◽  
Leonardo Lo Presti ◽  
Silvia Rizzato

The science of organic crystals and materials has seen in a few decades a spectacular improvement from months to minutes for an X-ray structure determination and from single-point lattice energy...


Author(s):  
Fangyuan Kang ◽  
Jie Yang ◽  
Qichun Zhang

Azaacenes have emerged as a new and important class of organic materials, and their synthetic strategies and applications as organic semiconductors have gained great progress in recent years. Generally, adopting...


Entropy ◽  
2022 ◽  
Vol 24 (1) ◽  
pp. 76
Author(s):  
Karo Michaelian ◽  
Ramón Eduardo Cano Mateo

Through a modern derivation of Planck’s formula for the entropy of an arbitrary beam of photons, we derive a general expression for entropy production due to the irreversible process of the absorption of an arbitrary incident photon spectrum in material and its dissipation into an infrared-shifted grey-body emitted spectrum, with the rest being reflected or transmitted. Employing the framework of Classical Irreversible Thermodynamic theory, we define the generalized thermodynamic flow as the flow of photons from the incident beam into the material and the generalized thermodynamic force is, then, the entropy production divided by the photon flow, which is the entropy production per unit photon at a given wavelength. We compare the entropy production of different inorganic and organic materials (water, desert, leaves and forests) under sunlight and show that organic materials are the greater entropy-producing materials. Intriguingly, plant and phytoplankton pigments (including chlorophyll) reach peak absorption exactly where entropy production through photon dissipation is maximal for our solar spectrum 430<λ<550 nm, while photosynthetic efficiency is maximal between 600 and 700 nm. These results suggest that the evolution of pigments, plants and ecosystems has been towards optimizing entropy production, rather than photosynthesis. We propose using the wavelength dependence of global entropy production as a biosignature for discovering life on planets of other stars.


Author(s):  
Bingwen Zhang ◽  
Jingjing Jiang ◽  
Wenji Wang ◽  
Qin Tu ◽  
Ruijin Yu ◽  
...  

Stimuli-responsive organic materials with aggregation-induced emission (AIE) characteristics have become a research hot spot in recent years due to their promising applications in information storage, organic light-emitting semiconductors (OLEDs) and...


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