scholarly journals A temperature-sensitive phase-change hydrogel of topotecan achieves a long-term sustained antitumor effect on retinoblastoma cells

2019 ◽  
Vol Volume 12 ◽  
pp. 6069-6082
Author(s):  
Yan Huo ◽  
Qun Wang ◽  
Ying Liu ◽  
Junyi Wang ◽  
Qian Li ◽  
...  
Keyword(s):  
Phase Change ◽  
Antitumor Effect ◽  
Temperature Sensitive ◽  
Retinoblastoma Cells ◽  
Sensitive Phase

scholarly journals Fabrication of a novel temperature sensitive phase change system based on ZnO@PNIPAM core-satellites and 1-tetradecanol as gatekeeper

2020 ◽  
Vol 3 ◽  
pp. 482-486
Author(s):  
Ying Guan ◽  
Xiao Ge ◽  
Somia Yassin Hussain Abdalkarim ◽  
Houyong Yu ◽  
Jaromir Marek ◽  
...  
Keyword(s):  
Phase Change ◽  
Temperature Sensitive ◽  
Sensitive Phase ◽  
Change System

scholarly journals A temperature-sensitive phase-change hydrogel of tamoxifen achieves the long-acting antitumor activation on breast cancer cells

2019 ◽  
Vol Volume 12 ◽  
pp. 3919-3931 ◽  
Author(s):  
Du Meng ◽  
Hongwei Lei ◽  
Xiaoqiang Zheng ◽  
Yaxuan Han ◽  
Ronggang Sun ◽  
...  
Keyword(s):  
Breast Cancer ◽  
Phase Change ◽  
Cancer Cells ◽  
Breast Cancer Cells ◽  
Temperature Sensitive ◽  
Sensitive Phase ◽  
Long Acting

Methods for Separation of Copper Oxide Nanoparticles From Colloidal Suspension in Dodecane

2014 ◽  
Vol 5 (1) ◽  
Author(s):  
Mohammed H. Sheikh ◽  
Muhammad A. R. Sharif
Keyword(s):  
Energy Storage ◽  
Copper Oxide ◽  
Phase Change ◽  
Phase Change Materials ◽  
Research Work ◽  
Cuo Nanoparticles ◽  
Health Hazards ◽  
Suspension Stability ◽  
Reduced Pressure

Phase change materials (PCM) are used in many energy storage applications. Energy is stored (latent heat of fusion) by melting the PCM and is released during resolidification. Dispersing highly conductive nanoparticles into the PCM enhances the effective thermal conductivity of the PCM, which in turn significantly improves the energy storage capability of the PCM. The resulting colloidal mixture with the nanoparticles in suspension is referred to as nanostructure enhanced phase change materials (NEPCM). A commonly used PCM for energy storage application is the family of paraffin (CnH2n+2). Mixing copper oxide (CuO) nanoparticles in the paraffin produces an effective and highly efficient NEPCM for energy storage. However, after long term application cycles, the efficiency of the NEPCM may deteriorate and it may need replacement with fresh supply. Disposal of the used NEPCM containing the nanoparticles is a matter of concern. Used NEPCM containing nanoparticles cannot be discarded directly into the environment because of various short term health hazards for humans and all living beings and unidentified long term environmental and health hazards due to nanoparticles. This problem will be considerable when widespread use of NEPCM will be practiced. It is thus important to develop technologies to separate the nanoparticles before the disposal of the NEPCM. The primary objective of this research work is to develop methods for the separation and reclamation of the nanoparticles from the NEPCM before its disposal. The goal is to find, design, test, and evaluate separation methods which are simple, safe, and economical. The specific NEPCM considered in this study is a colloidal mixture of dodecane (C12H26) and CuO nanoparticles (1–5% mass fraction and 5–15 nm size distribution). The nanoparticles are coated with a surfactant or stabilizing ligands for suspension stability in the mixture for a long period of time. Various methods for separating the nanoparticles from the NEPCM are explored. The identified methods include: (i) distillation under atmospheric and reduced pressure, (ii) mixing with alcohol mixture solvent, and (iii) high speed centrifugation. These different nanoparticle separation methods have been pursued and tested, and the results are analyzed and presented in this article.

Selective Transport of Water-Soluble Proteins from Aqueous to Ionic Liquid Phase via a Temperature-Sensitive Phase Change of These Mixtures

2012 ◽  
Vol 65 (11) ◽  
pp. 1548 ◽  
Author(s):  
Yuki Kohno ◽  
Nobuhumi Nakamura ◽  
Hiroyuki Ohno
Keyword(s):  
Phase Change ◽  
Aqueous Phase ◽  
Selective Dissolution ◽  
Selective Extraction ◽  
Soluble Proteins ◽  
Water Soluble ◽  
Temperature Sensitive ◽  
Salting Out ◽  
Key Factor ◽  
The Difference

Mixtures of some ionic liquids (ILs) and water show reversible phase change between a homogeneous mixture and phase-separated state by a small change in temperature. Some water-soluble proteins have been migrated from the aqueous to the IL phase. When tetrabutylphosphonium 2,4,6-trimethylbenzenesulfonate was used as an IL, cytochrome c (Cyt.c) was found to be extracted from the water phase to the IL phase. Conversely, both horseradish peroxidase (HRP) and azurin remained in the aqueous phase. This selective extraction was comprehended to be due to the difference in solubility of these proteins in both phases. The separated aqueous phase contained a small amount of IL, which induced the salting-out of Cyt.c. On the other hand, condensed IL phase promoted the salting-in of Cyt.c. As a result, Cyt.c was preferably dissolved in the hydrated IL phase rather than aqueous phase. In the case of HRP, there was only a salting-out profile upon increasing the concentration of IL, which induced selective dissolution of HRP in the aqueous phase. These results clearly suggest that the profile of salting-out and salting-in for proteins is the key factor to facilitate the selective extraction of proteins from aqueous to the IL phase.

scholarly journals Formic acid above the Jungfraujoch during 1985–2007: observed variability, seasonality, but no long-term background evolution

2010 ◽  
Vol 10 (6) ◽  
pp. 14771-14814 ◽  
Author(s):  
R. Zander ◽  
P. Duchatelet ◽  
E. Mahieu ◽  
P. Demoulin ◽  
G. Roland ◽  
...  
Keyword(s):  
Formic Acid ◽  
High Spectral Resolution ◽  
Temperature Sensitive ◽  
Atmospheric Gases ◽  
Vertical Column ◽  
Line Intensities ◽  
Sigma Level ◽  
Remote Measurements ◽  
Remote Determination

Abstract. This paper reports on daytime total vertical column abundances of formic acid (HCOOH) above the Northern mid-latitude, high altitude Jungfraujoch station (Switzerland; 46.5° N, 8.0° E, 3580 m altitude). The columns were derived from the analysis of infrared solar observations regularly performed with high spectral resolution Fourier transform spectrometers during over 1537 days between September 1985 and September 2007. The investigation was based on the spectrometric fitting of five spectral intervals, one encompassing the HCOOH ν6 band Q branch at 1105 cm−1, and four additional ones allowing to optimally account for critical temperature-sensitive or timely changing interferences by other atmospheric gases, in particular HDO, CCl2F2 and CHClF2. The main results derived from the 22 yr long database indicate that the free tropospheric burden of HCOOH above the Jungfraujoch undergoes important short-term daytime variability, diurnal and seasonal modulations, inter-annual anomalies, but no statistically significant long-term background change at the 1-sigma level. A major progress in the remote determination of the atmospheric HCOOH columns reported here has resulted from the adoption of new, improved absolute spectral line intensities for the infrared ν6 band of trans-formic acid, resulting in retrieved free tropospheric loadings being about a factor two smaller than if derived with previous spectroscopic parameters. Implications of this significant change with regard to earlier remote measurements of atmospheric formic acid and comparison with relevant Northern mid-latitude in situ findings will be assessed critically. Sparse HCOOH model predictions will also be evoked.

Long-term seawater anti-corrosion properties of Al alloy triggered by femtosecond laser structuring with phase change

2021 ◽  
pp. 151612
Author(s):  
Rahul A. Rajan ◽  
Srinivasa Rao Konda ◽  
Chaudry Sajed Saraj ◽  
Yu Hang Lai ◽  
Gopal Verma ◽  
...  
Keyword(s):  
Femtosecond Laser ◽  
Phase Change ◽  
Al Alloy ◽  
Corrosion Properties ◽  
Laser Structuring

Sol-Gel condensation of temperature sensitive and shape stabilized phase change materials for thermal energy storage

2020 ◽  
Vol 693 ◽  
pp. 178758
Author(s):  
Xinghui Li ◽  
Pei Yang ◽  
Ziqi Zhu ◽  
Zhenping You ◽  
Wei Zhang ◽  
...  
Keyword(s):  
Energy Storage ◽  
Phase Change ◽  
Thermal Energy ◽  
Thermal Energy Storage ◽  
Phase Change Materials ◽  
Sol Gel ◽  
Temperature Sensitive
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