Particle size dependent hysteresis loss in La0.7Ce0.3Fe11.6Si1.4C0.2 first‐order systems

2012 ◽  
Vol 100 (7) ◽  
pp. 072403 ◽  
Author(s):  
F. X. Hu ◽  
L. Chen ◽  
J. Wang ◽  
L. F. Bao ◽  
J. R. Sun ◽  
...  
Keyword(s):  
Particle Size ◽  
Hysteresis Loss ◽  
First Order ◽  
Size Dependent

Development of Sustained Release Multi-Component Microparticulate System of Diclofenac Sodium and Tizanidine Hydrochloride

1970 ◽  
Vol 1 (1) ◽  
pp. 97-105
Author(s):  
Kamlesh Dashora ◽  
Shailendra Saraf ◽  
Swarnalata Saraf
Keyword(s):  
Particle Size ◽  
Sustained Release ◽  
Cellulose Acetate ◽  
Rate Constant ◽  
Diclofenac Sodium ◽  
Order Rate Constant ◽  
Anomalous Transport ◽  
First Order ◽  
Sem Study ◽  
Transport Type

Sustained released tablets of diclofenac sodium (DIC) and tizanidine hydrochloride (TIZ) were prepared by using different proportions of cellulose acetate (CA) as the retardant material. Nine formulations of tablets having different proportion of microparticles developed by varied proportions of polymer: drug ratio ‘’i.e.’’; 1:9 -1:3 for DIC and 1:1 – 3:1 for TIZ. Each tablet contained equivalent to 100 mg of DIC and 6mg of TIZ. The prepared microparticles were white, free flowing and spherical in shape (SEM study), with  the particle size varying from 78.8±1.94 to 103.33±1.28 µm and 175.92± 9.82 to 194.94±14.28µm for DIC  and TIZ, respectively.  The first order rate constant K1 of formulations were found to be in the range of  K1 = 0.117-0.272 and 0.083- 0.189 %hr-1for DIC and TIZ, respectively. The value of exponent coefficient (n) was found to be in the range of 0.6328-0.9412  and 0.8589-1.1954 for DIC and TIZ respectively indicates anomalous  to  non anomalous transport type of diffusions among different formulations

Up-conversion emission and in vitro cytotoxicity characterization of blue emitting, biocompatible SrTiO3 nanoparticles activated with Tm3+ and Yb3+ ions

RSC Advances ◽  
2016 ◽  
Vol 6 (45) ◽  
pp. 39469-39479 ◽  
Author(s):  
R. Pazik ◽  
A. Zięcina ◽  
B. Poźniak ◽  
M. Malecka ◽  
L. Marciniak ◽  
...  
Keyword(s):  
Particle Size ◽  
Cytotoxic Effect ◽  
In Vitro Cytotoxicity ◽  
Ion Release ◽  
Size Dependent ◽  
U2os Cells

Blue emitting, up-converting NP's of SrTiO3:Tm3+/Yb3+ synthesized using the citric route are biocompatible towards J774.E whereas the cytotoxic effect to U2OS cells is not particle size dependent but most probably is related to Sr2+ ion release.

Size-dependent solution-mediated phase transformation of piroxicam monohydrate particles

CrystEngComm ◽  
2021 ◽  
Vol 23 (16) ◽  
pp. 2928-2932
Author(s):  
Changlin Yao ◽  
Lei Wang ◽  
Xinyuan Wang ◽  
Xutang Tao
Keyword(s):  
Particle Size ◽  
Phase Transformation ◽  
Size Dependent

The transformation from the piroxicam monohydrate to form I or form II could be achieved precisely by adjusting the particle size itself in the 99% acetone-1% H2O solvent at 31 °C.

EFFECT OF NANO PARTICLE SIZES ON HIGH PRESSURE RAMAN SCATTERING IN NANOCRYSTALLINE CERIUM DIOXIDE

2011 ◽  
Vol 25 (31) ◽  
pp. 2399-2405 ◽  
Author(s):  
P. JIMLIM ◽  
T. BOVORNRATANARAKS ◽  
W. CHAIMAYO ◽  
S. PRATONTEP
Keyword(s):  
Particle Size ◽  
High Pressure ◽  
Oxygen Vacancies ◽  
Molar Fraction ◽  
Raman Frequency ◽  
Particle Sizes ◽  
Nano Particle ◽  
First Order ◽  
Nanocrystalline Cerium Dioxide ◽  
Diamond Anvil

Nanocrystalline CeO 2 with different particle sizes has been studied under high pressure using Raman spectroscopy techniques and diamond anvil cell at room temperature. The pressure shift of the first-order Raman frequency for each particle sizes was measured. Linear dependence of the first order Raman frequency on pressure for each particle sizes has been observed. We found that the first order Raman frequency decreases with the decreasing particle sizes under ambient condition and the lattice constant increases with the decreasing particle size. The increasing molar fraction of oxygen vacancies with the decreasing particle size is responsible for the lattice expansion.

Spatial, seasonal and particle size dependent variations of PAH contamination in indoor dust and the corresponding human health risk

2019 ◽  
Vol 653 ◽  
pp. 423-430 ◽  
Author(s):  
Zhiguo Cao ◽  
Mengmeng Wang ◽  
Qiaoying Chen ◽  
Chunyou Zhu ◽  
Janye Jie ◽  
...  
Keyword(s):  
Particle Size ◽  
Health Risk ◽  
Human Health ◽  
Human Health Risk ◽  
Indoor Dust ◽  
Size Dependent

scholarly journals Speciation and pH- and particle size-dependent solubility of phosphorus in tropical sandy soils

Geoderma ◽  
2022 ◽  
Vol 408 ◽  
pp. 115590
Author(s):  
Apinya Saentho ◽  
Worachart Wisawapipat ◽  
Phrueksa Lawongsa ◽  
Surachet Aramrak ◽  
Nattaporn Prakongkep ◽  
...  
Keyword(s):  
Particle Size ◽  
Sandy Soils ◽  
Size Dependent

SIGNIFICANCE OF CORRENSITE IN SOILS OF SOUTHEASTERN ONTARIO

1988 ◽  
Vol 68 (3) ◽  
pp. 671-681 ◽  
Author(s):  
N. M. MILES ◽  
C. R. De KIMPE
Keyword(s):  
Particle Size ◽  
Hydrothermal Alteration ◽  
Soil Reaction ◽  
Mineralogical Analysis ◽  
Soil Evolution ◽  
Grenville Province ◽  
Particle Size Fractions ◽  
First Order ◽  
Basal Reflection ◽  
Interstratified Mineral

Samples were collected from Ap/Ah and Bm horizons of 10 soils from southeastern Ontario. The soil reaction ranged from medium acid to mildly alkaline. Mineralogical analysis of the various particle-size fractions showed the presence of corrensite, talc and graphite in the assemblage. These three minerals were also present in large amounts in marble outcrops, where they were formed by hydrothermal alteration and metamorphism. The significance of inherited interstratified minerals in the soils was considered from the analytical aspect: the first-order basal reflection should be confirmed because higher orders could be confounded with other mineral reflections; and from the pedogenetic aspect: failing to recognize an inherited interstratified mineral would be misleading in the interpretation of soil evolution. Key words: Grenville province, interstratified mineral, corrensite, talc, graphite, inherited minerals

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