Abstract：
:In this paper, we report a new method based on supercritical carbon dioxide (scCO(2)) to fill and distribute the porous magnetic nanoparticles with n-octanol in a homogeneous manner. The high solubility of n-octanol in scCO(2) and high diffusivity and permeability of the fluid allow efficient delivery of n-octanol into the porous magnetic nanoparticles. Thus, the n-octanol-loaded magnetic nanoparticles can be readily dispersed into aqueous buffer (pH 7.40) to form a homogenous suspension consisting of nano-sized n-octanol droplets. We refer this suspension as the n-octanol stock solution. The n-octanol stock solution is then mixed with bulk aqueous phase (pH 7.40) containing an organic compound prior to magnetic separation. The small-size of the particles and the efficient mixing enable a rapid establishment of the partition equilibrium of the organic compound between the solid supported n-octanol nano-droplets and the bulk aqueous phase. UV-vis spectrophotometry is then applied to determine the concentration of the organic compound in the aqueous phase both before and after partitioning (after magnetic separation). As a result, logD values of organic compounds of pharmaceutical interest determined by this modified method are found to be in excellent agreement with the literature data.
journal_name
Int J Pharmjournal_title
International journal of pharmaceuticsauthors
Tsang SC,Yu CH,Gao X,Tam KYdoi
10.1016/j.ijpharm.2006.07.031subject
Has Abstractpub_date
2006-12-11 00:00:00pages
139-44issue
1-2eissn
0378-5173issn
1873-3476pii
S0378-5173(06)00589-8journal_volume
327pub_type
杂志文章abstract：:Amphotericin B (AmB) has a broad antifungal and leishmanicidal activity with low incidence of clinical resistance. Its parenteral administration has high risk of nephrotoxicity that limits its use. In order to treat cutaneous infections, AmB topical administration is a safer therapy because of the low systemic absorpt...
journal_title：International journal of pharmaceutics
pub_type： 杂志文章
doi：10.1016/j.ijpharm.2014.07.004
更新日期：2014-10-01 00:00:00
abstract：:PLGA microspheres undergo physical ageing but their ageing kinetics have not been reported, nor the effect of encapsulated protein or plasmid DNA on any associated changes to the glass transition. Differential scanning calorimetry (DSC) was used to measure the rate of ageing of various PLGA microsphere formulations, w...
journal_title：International journal of pharmaceutics
pub_type： 杂志文章
doi：10.1016/j.ijpharm.2007.02.026
更新日期：2007-07-18 00:00:00
abstract：:The effect of nicotinamide on the properties of aqueous hydroxypropylmethylcellulose (HPMC) solutions was studied. Rheological studies showed that solutions of HPMC of concentration less than 3.0 w/v.% did not form gels and exhibited Newtonian flow patterns at 25 degrees C. The inclusion of nicotinamide increased the ...
journal_title：International journal of pharmaceutics
pub_type： 杂志文章
doi：10.1016/s0378-5173(01)00770-0
更新日期：2001-09-11 00:00:00
abstract：:In this paper, a fast forming nano-composite hydrogel was developed for potential application in ocular drug delivery. The optical transmission (OT) as well as rheological properties of nano-composite hydrogel was characterized. The developed nano-composite hydrogel given a high diclofenac micelles loading and provide...
journal_title：International journal of pharmaceutics
pub_type： 杂志文章
doi：10.1016/j.ijpharm.2013.03.024
更新日期：2013-05-01 00:00:00
abstract：:This work aimed to clarify the relationship between polymer function and insulin absorption, and to evaluate the optimized preparative formulation predicted from this relationship. Insulin-loaded polymer (ILP) carrier systems were prepared following a two-factor composite second-order spherical experimental design. To...
journal_title：International journal of pharmaceutics
pub_type： 杂志文章
doi：10.1016/j.ijpharm.2007.10.050
更新日期：2008-04-16 00:00:00
abstract：:The paper describes sterically stabilized lipid nanocapsules (LNC) and multilamellar liposomes (MLV) coated using a new amphiphilic conjugate of PEG(2000) with a 2-alkyl-lipoamino acid (LAA). A complement activation assay (CH50) and uptake experiments by THP-1 macrophage cells were used to assess in vitro the effectiv...
journal_title：International journal of pharmaceutics
pub_type： 杂志文章
doi：10.1016/j.ijpharm.2012.01.038
更新日期：2012-04-15 00:00:00
abstract：:Stimulated acoustic relaxation emissions from maize starch tablets after compression were detected and recorded in the audible region. Stimulation was found to enhance the detected acoustic emission and to maintain recordable acoustic emission level longer. Based on the fact, that the stimulation by a halogen lamp and...
journal_title：International journal of pharmaceutics
pub_type： 杂志文章
doi：10.1016/s0378-5173(01)00648-2
更新日期：2001-06-04 00:00:00
abstract：:Flash nanoprecipitation (FNP) is a controlled antisolvent precipitation process that has proven effective for consistent production of drug nanoparticles with a defined mean particle size and narrow particle size distribution. However, physical instability of the generated nanoparticles remains a major challenge in th...
journal_title：International journal of pharmaceutics
pub_type： 杂志文章
doi：10.1016/j.ijpharm.2018.03.006
更新日期：2018-05-05 00:00:00
abstract：:Gastro-floating tablets of cephalexin were developed to prolong the residence time in major absorption sites. Gastro-floating tablets were prepared and optimized using hydroxypropyl methylcellulose (HPMC K100M) as matrix and sodium bicarbonate as a gas-forming agent. The properties of the tablets in terms of floating ...
journal_title：International journal of pharmaceutics
pub_type： 杂志文章
doi：10.1016/j.ijpharm.2013.05.011
更新日期：2013-08-16 00:00:00
abstract：:Solid dosage forms are the pharmaceutical drug delivery systems of choice for oral drug delivery. These solid dosage forms are often coated to modify the physico-chemical properties of the active pharmaceutical ingredients (APIs), in particular to alter release kinetics. Since the product performance of coated dosage ...
journal_title：International journal of pharmaceutics
pub_type： 杂志文章,评审
doi：10.1016/j.ijpharm.2013.03.053
更新日期：2013-12-05 00:00:00
abstract：:Antimicrobial urological catheters were developed by the mixed, covalent and non-covalent binding of sparfloxacin (SPA) to heparin (HP) film which was first deposited on the latex surface of biomaterial. The SPA-HP modified surface was characterized by SEM analysis and ATR-Fourier transform infrared spectroscopy. For ...
journal_title：International journal of pharmaceutics
pub_type： 杂志文章
doi：10.1016/j.ijpharm.2010.10.014
更新日期：2010-12-15 00:00:00
abstract：:We present a two-step process to produce dry-state Ketoprofen-loaded poly(methyl methacrylate) nanoparticles (NPs) with controllable size and tunable drug release profile. A colloidal suspension of drug-loaded nanoparticles was first obtained from a nanoprecipitation process and then transferred into a commercial spra...
journal_title：International journal of pharmaceutics
pub_type： 杂志文章
doi：10.1016/j.ijpharm.2018.12.031
更新日期：2019-03-10 00:00:00
abstract：:The enhancing effects of non-ionic surfactants on the permeation of piroxicam from the poloxamer gels were evaluated using Franz diffusion cells fitted with excised rat skins. The effectiveness of penetration enhancers, the ratio of piroxicam flux in the presence or absence of enhancers, was defined as the enhancement...
journal_title：International journal of pharmaceutics
pub_type： 杂志文章
doi：10.1016/s0378-5173(01)00699-8
更新日期：2001-07-17 00:00:00
abstract：:The number of mixed micellar (MM) drug products being introduced into the commercial pharmaceutical market is very limited although there is need for alternative dosage forms for poorly soluble active drug substances. While known systems are composed of phosphatidylcholine and bile salts, it was the aim of this study ...
journal_title：International journal of pharmaceutics
pub_type： 杂志文章
doi：10.1016/j.ijpharm.2009.12.018
更新日期：2010-03-15 00:00:00
abstract：:Systemic delivery of therapeutic proteins to the central nervous system (CNS) is challenging because of the blood-brain barrier restrictions. Direct intrathecal delivery is possible but does not produce stable concentrations. We are proposing an alternative approach for localized delivery into the CNS based on the Tra...
journal_title：International journal of pharmaceutics
pub_type： 杂志文章
doi：10.1016/j.ijpharm.2017.10.002
更新日期：2017-12-20 00:00:00
abstract：:We developed dual paclitaxel (PTX)/superparamagnetic iron oxide (SPIO)-loaded PLGA-based nanoparticles for a theranostic purpose. Nanoparticles presented a spherical morphology and a size of 240 nm. The PTX and iron loading were 1.84 ± 0.4 and 10.4 ± 1.93 mg/100 mg respectively. Relaxometry studies and phantom MRI dem...
journal_title：International journal of pharmaceutics
pub_type： 杂志文章
doi：10.1016/j.ijpharm.2013.02.042
更新日期：2013-04-15 00:00:00
abstract：:To reduce systemic bleeding risks during anticoagulant treatment, a new concept named "precise anticoagulation" was proposed to localize the effects of anticoagulants via the targeted delivery of prodrugs to the coagulation site. In this study, the fusion protein Annexin V-hirudin 3-ABD (hAvHA) was constructed to achi...
journal_title：International journal of pharmaceutics
pub_type： 杂志文章
doi：10.1016/j.ijpharm.2020.119869
更新日期：2020-09-10 00:00:00
abstract：:The aim of this work was to characterise a new type of particulate system, named beads, prepared by a straightforward technique starting from a mixture of alpha-cyclodextrin aqueous solution and soybean oil without the use of any organic solvent or surface-active agent. Mechanisms involved in bead formation were also ...
journal_title：International journal of pharmaceutics
pub_type： 杂志文章
doi：10.1016/j.ijpharm.2007.02.034
更新日期：2007-07-18 00:00:00
abstract：:Current efforts on inflammatory bowel diseases (IBD) treatment are focused on strategies for localised drug delivery at the intestinal mucosa. Despite the potential of curcumin (CC) for IBD treatment, its low solubility and stability limit its application. Thus, the design of nanocarriers that focus CC delivery at the...
journal_title：International journal of pharmaceutics
pub_type： 杂志文章
doi：10.1016/j.ijpharm.2020.119533
更新日期：2020-08-30 00:00:00
abstract：:The objective of this study was to design an all-trans retinoic acid (RA) topical release system that modifies drug diffusion parameters in the vehicle and the skin in order to reduce systemic absorption and the side-effects associated with topical application of the drug to skin. Three cases of application of hydroge...
journal_title：International journal of pharmaceutics
pub_type： 杂志文章
doi：10.1016/j.ijpharm.2005.03.018
更新日期：2005-06-13 00:00:00
abstract：:Rhenium-188 labeled tin (Sn) microparticles were developed for pain palliation therapy in the patients suffering from synovitis with acute pain. The rhenium tin microparticles were prepared using stannous chloride and freshly eluted (188)ReO(4)(-) from (188)W/(188)Re generator. The aggregated colloidal particles, pack...
journal_title：International journal of pharmaceutics
pub_type： 杂志文章
doi：10.1016/j.ijpharm.2007.01.014
更新日期：2007-06-29 00:00:00
abstract：:The aim of this study was to provide preliminary validation of a new sublingual mucosal cell line (HO-1-u-1) for use as in vitro sublingual drug delivery screening of compounds involving passive diffusion. HO-1-u-1 cells were seeded on cell culture inserts. The ultrastructure and integrity of cell layers, inter-passag...
journal_title：International journal of pharmaceutics
pub_type： 杂志文章
doi：10.1016/j.ijpharm.2006.10.012
更新日期：2007-04-04 00:00:00
abstract：PURPOSE:This study aimed to investigate the penetration of topical and oral ofloxacin into aqueous humor and vitreous humor in post-traumatic endophthalmitis model in rabbits. METHODS:A standardized intraocular infection after penetrating injury was made in the right eyes of 16 rabbits. Intraocular infection was induc...
journal_title：International journal of pharmaceutics
pub_type： 杂志文章
doi：10.1016/s0378-5173(00)00482-8
更新日期：2000-08-25 00:00:00
abstract：:Gravimetric water sorption experiments were performed to study the crystallization behavior of amorphous spray-dried lactose over a wide range of temperature and humidity conditions. Experiments performed at 25 degrees C between 48 and 60% relative humidity (RH) showed that the onset time to crystallization increased ...
journal_title：International journal of pharmaceutics
pub_type： 杂志文章
doi：10.1016/j.ijpharm.2006.01.012
更新日期：2006-04-26 00:00:00
abstract：:The present investigation aims at formulating lipid based drug delivery system of β-Artemether and Lumefantrine and comparative pharmacological evaluation with innovator formulation. Commercial modified oil and indigenous natural fatty acids comprised the oily phase in developing lipidic formulation of β-Artemether an...
journal_title：International journal of pharmaceutics
pub_type： 杂志文章
doi：10.1016/j.ijpharm.2013.07.033
更新日期：2013-10-15 00:00:00
abstract：:The purpose of this study was to investigate the dispersal mechanism of retinol (Vitamin A, VA) into phospholipid. VA was dispersed with soybean phosphatidylcholine (PC) using sonication and the dispersal mechanism was evaluated by characterizing the dispersed particles using dynamic light scattering, fluorescence spe...
journal_title：International journal of pharmaceutics
pub_type： 杂志文章
doi：10.1016/s0378-5173(02)00677-4
更新日期：2003-03-06 00:00:00
abstract：:In this study, a temperature and ROS-responsive drug delivery system ROSP@MSN based on mesoporous silica nanoparticles has been designed and synthesized by taking advantage of 4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzyl acrylate modified polymers (ROSP) as "nano-valve", which can respond selectively to cance...
journal_title：International journal of pharmaceutics
pub_type： 杂志文章
doi：10.1016/j.ijpharm.2017.11.025
更新日期：2018-01-30 00:00:00
abstract：:Polymeric micelles (PM) based on poly(ethylene glycol)-b-poly(N-2-benzoyloxypropyl methacrylamide) (mPEG-b-p(HPMA-Bz)) loaded with paclitaxel (PTX-PM) have shown promising results in overcoming the suboptimal efficacy/toxicity profile of paclitaxel. To get insight into the stability of PTX-PM formulations upon storage...
journal_title：International journal of pharmaceutics
pub_type： 杂志文章
doi：10.1016/j.ijpharm.2020.119409
更新日期：2020-06-30 00:00:00
abstract：:Previously, PTX/Pluronic F127 nanocrystals were prepared in our laboratory using the stabilization of nanocrystals (SNC) method. For PTX nanocrystals, dosages could be increased to yield improved antitumor activity over Taxol without incidence of acute toxicity. The objectives of this current study are to further unde...
journal_title：International journal of pharmaceutics
pub_type： 杂志文章
doi：10.1016/j.ijpharm.2010.02.013
更新日期：2010-05-10 00:00:00
abstract：:The dispersion performances of inhalation powders are often tested at only one inhalation flow rate in mechanistic formulation studies. This limited approach is challenged by studies showing that interactions exist between inhalation flow rate and the effects on dispersion performance of several formulation variables....
journal_title：International journal of pharmaceutics
pub_type： 杂志文章
doi：10.1016/j.ijpharm.2014.02.024
更新日期：2014-04-25 00:00:00
