Formation of positively charged microcapsules based on chitosan-lecithin interactions.

abstract：:Polyurethane modified with polylactic acid microcapsules were fabricated for controlled release of chlorpyrifos (one of the high usage solid phosphorous insecticides) via interfacial polymerisation with diphenylmethane diisocyanate, polyether triol, 1,4-butanediol and polylactic acid as modifier. The structure, morpho...

journal_title：Journal of microencapsulation

authors： Zheng T,Chen K,Chen W,Wu B,Sheng Y,Xiao Y

更新日期：2019-01-01 00:00:00

abstract：:To prepare the sustained release vitamin C carriers, vitamin C was successfully encapsulated in tripolyphosphate (TPP) cross-linked chitosan (TPP-chitosan) microspheres by the spray-drying method at different manufacturing conditions. Manufacturing parameters (inlet temperature, liquid flow rate, chitosan concentratio...

journal_title：Journal of microencapsulation

authors： Desai KG,Park HJ

更新日期：2006-02-01 00:00:00

abstract：:Nanoencapsulation by spray drying was performed to protect and preserve antioxidant rich dietary polyphenols from green coffee beans. Nano-encapsulation of green coffee was done using maltodextrin as wall material. The nanoparticles were further characterised by zetasizer, differential scanning colorimetry, X-ray diff...

journal_title：Journal of microencapsulation

authors： Desai NM,Gilbert Stanley J,Murthy PS

更新日期：2020-01-01 00:00:00

abstract：:The size dependent and size independent contributions to the mechanical properties of poly(ethyleneglycol) microspheres with encapsulated air, made for medical ultrasound imaging, have been studied. A relation between the size of microspheres in a reference group and their acoustic attenuation efficacy was derived by ...

journal_title：Journal of microencapsulation

authors： Dyrstad K,Sontum PC,Hoff L

更新日期：2000-05-01 00:00:00

abstract：:The purpose of this study was to design and characterise an oral mucoadhesive micellar drug carrier. In this regard, a mucoadhesive hydrophobic cationic aminocellulose was easily synthesised under mild homogeneous conditions with high yield. The cellulose derivative resulted in strongly improved mucoadhesive propertie...

journal_title：Journal of microencapsulation

authors： Songsurang K,Siraleartmukul K,Muangsin N

更新日期：2015-01-01 00:00:00

abstract：:The purpose of present research work was to develop mucoadhesive microspheres for nasal delivery with the aim to avoid hepatic first-pass metabolism, improve therapeutic efficacy and enhance residence time. For the treatment of migraine, hydroxypropyl methylcellulose (HPMC) K4M and K15M based microspheres containing s...

journal_title：Journal of microencapsulation

authors： Jain SA,Chauk DS,Mahajan HS,Tekade AR,Gattani SG

更新日期：2009-12-01 00:00:00

abstract：:Cross-linked albumin microcapsules were prepared, using a polycondensation interfacial process. Doxorubicin was incorporated in these microcapsules by simple adsorption from aqueous solution. Increasing the extent of cross-linkage of the microcapsule walls by either increasing the cross-linking agent concentration or ...

journal_title：Journal of microencapsulation

authors： Sawaya A,Fickat R,Benoit JP,Puisieux F,Benita S

更新日期：1988-07-01 00:00:00

abstract：:The effect of several parameters on the size of alginate beads produced by use of an electrostatic potential bead generator was examined. Parameters studied included needle diameter, electrostatic potential, alginate solution flow rate, gelling ion concentration and alginate concentration and viscosity, as well as alg...

journal_title：Journal of microencapsulation

authors： Klokk TI,Melvik JE

更新日期：2002-07-01 00:00:00

abstract：:The effects of different loading procedures of magnetic nanoparticles (MNs) on the structure and physicochemical properties of cisplatin magnetic liposomes were investigated by X-ray diffraction, infrared spectroscopy, transmission electron microscopy, and fluorescence spectroscopy. 1, 2-Dipalmitoyl-sn-glycero-3-Phosp...

journal_title：Journal of microencapsulation

authors： Wang L,Yang CQ,Wang J

更新日期：2012-01-01 00:00:00

abstract：:The factors influencing the encapsulation of azathioprine (AZA) into liposomes were investigated to find out the conditions for its optimal entrapment. Similar studies for comparison were also carried out on 6-mercaptopurine (6-MP), of which AZA is a prodrug. AZA and also 6-MP show higher encapsulation efficiencies in...

journal_title：Journal of microencapsulation

authors： Gulati M,Grover M,Singh M,Singh S

更新日期：1998-07-01 00:00:00

abstract：:Atomic force microscopy (AFM) is recognized a suitable and powerful technique for surface and morphological analysis. Even if until now this technique has not been frequently used in the pharmaceutical field, it can contribute to an accurate morphologic characterization of microspheres and nanospheres. In this work, a...

journal_title：Journal of microencapsulation

authors： Dorati R,Patrini M,Perugini P,Pavanetto F,Stella A,Modena T,Genta I,Conti B

更新日期：2006-03-01 00:00:00

abstract：:This article describes the physicochemical properties of chitosan-coated liposomes containing skin-protecting agents, coenzyme Q10 and alpha-lipoic acid (CCAL). CCAL had a spherical shell-core structure and liposomes inverted the surface charge from negative to positive after coating with chitosan. Compared with the u...

journal_title：Journal of microencapsulation

authors： Zhao GD,Sun R,Ni SL,Xia Q

更新日期：2015-01-01 00:00:00

abstract：:PLA microparticles containing 17-β-estradiol valerate were prepared by an emulsion/evaporation method in order to sustain drug release. This system was characterized concerning particle size, particle morphology and the influence of formulation and processing parameters on drug encapsulation and in vitro drug release....

journal_title：Journal of microencapsulation

authors： Machado SR,Lunardi LO,Tristão AP,Marchetti JM

更新日期：2009-05-01 00:00:00

abstract：:Ibuprofen-loaded polystyrene microparticles were prepared by the emulsion-solvent evaporation process from an aqueous system. The effects of different parameters on the drug content and on the release of the drug from the microparticles were investigated. The drug content, in all the formulations, was less than the th...

journal_title：Journal of microencapsulation

authors： Tamilvanan S,Sa B

更新日期：2000-01-01 00:00:00

abstract：:Since 1978 we have prepared microencapsulated insecticides by complex coacervation and interfacial polymerization for household insect pest control, fenthion being the main core element. A series of tests have been conducted against mosquitoes (Culex pipiens quinquefasciatus), cockroaches (Periplaneta americana) and b...

journal_title：Journal of microencapsulation

authors： Gao YT,Shen PY,Wang BH,Lü SD,Huang GC,Ho LS

更新日期：1984-10-01 00:00:00

abstract：:Graft copolymer polyethylenimine-graft-poly(N-vinylpyrrolidone) (PEI-g-PVP) was prepared by coupling mono carboxyl-terminated PVP (PVP-COOH) with PEI using N,N'-dicyclohexylcarbodiimide (DCC) and N-hydroxysuccinimide (NHS) as coupling agents. In aqueous medium, PVP-g-PEI can self-assemble into stable polyion complex m...

journal_title：Journal of microencapsulation

authors： Yuan J,Luo Y,Gao Q

更新日期：2011-01-01 00:00:00

abstract：:A novel method for preparing the PLGA nanospheres with hydrophilic surface has been designed and characterized. Because of good solubility of tetraglycol in water, PLGA (poly(lactide-co-glycolide)) nanospheres were formed by spraying the PLGA/tetraglycol solution into water. The size of PLGA nanospheres was manipulate...

journal_title：Journal of microencapsulation

authors： Kim BK,Kim D,Cho SH,Yuk SH

更新日期：2004-11-01 00:00:00

abstract：:Emulsions of menhaden oil and sodium caseinate (NaCas) incorporating carbohydrates of varying dextrose equivalence (DE) were spray-dried to yield encapsulated fish oil powders. The effects of carbohydrate DE (5.5-38), core/wall ratio and NaCas/carbohydrate ratio on microencapsulation efficiency (ME) and oxidative stab...

journal_title：Journal of microencapsulation

authors： Hogan SA,O'Riordan ED,O'Sullivan M

更新日期：2003-09-01 00:00:00

abstract：:This study focuses on development and in vitro characterisation of a nasal delivery system based on uncoated or chitosan-coated solid lipid microparticles (SLMs) containing resveratrol, a natural anti-inflammatory molecule, as an effective alternative to the conventional steroidal drugs. The physico-chemical character...

journal_title：Journal of microencapsulation

authors： Martignoni I,Trotta V,Lee WH,Loo CY,Pozzoli M,Young PM,Scalia S,Traini D

更新日期：2016-12-01 00:00:00

abstract：:Using liposomes radiolabelled by the 99mTechnetium-stannous chloride technique we have investigated the effect of surface charge on the stability of the isotope in vitro and in vivo. Dialysis of 99mTc-labelled positive, negative and neutral liposomes, which had been incubated in either saline or normal rat serum showe...

journal_title：Journal of microencapsulation

authors： Love WG,Amos N,Williams BD,Kellaway IW

更新日期：1989-01-01 00:00:00

abstract：PURPOSE:This investigation was undertaken to develop glyceryl monostearate (Geleol)-based solid lipid nanoparticles (SLNs) of a hydrophilic drug ciprofloxacin HCl. METHODS:Hansen's solubility parameter study was carried out in screening of a suitable carrier and solvent system. Subsequently, SLNs were prepared by solv...

journal_title：Journal of microencapsulation

authors： Shah M,Agrawal Y

更新日期：2012-01-01 00:00:00

abstract：:Monodisperse albumin microspheres were successfully prepared by both chemical or thermal hardening methods via membrane emulsification using microporous glass membranes with uniform pore sizes. The monodispersity of the microspheres was found to depend strongly on parameters such as albumin concentration, emulsifier c...

journal_title：Journal of microencapsulation

authors： el-Mahdy M,Ibrahim ES,Safwat S,el-Sayed A,Ohshima H,Makino K,Muramatsu N,Kondo T

更新日期：1998-09-01 00:00:00

abstract：:Chlorogenic acid (CA) is a natural compound used as an antioxidant in the preparation of food, drugs, and cosmetics. Due to their low stability and bioavailability, many researchers have studied the encapsulation of CA in various delivery colloidal systems. The aim of this study was to evaluate the stability of water-...

journal_title：Journal of microencapsulation

authors： Dima C,Dima S

更新日期：2018-09-01 00:00:00

abstract：:In ophthalmic drug delivery, a major problem is retaining an adequate concentration of a therapeutic agent in the pre-corneal area. Polycarboxylic acid carriers such as polyacrylic acid and polyitaconic acid in sub-colloidal, nanoparticulate hydrogel form have a strong potential for sustained release of a drug in ocul...

journal_title：Journal of microencapsulation

authors： De TK,Bergey EJ,Chung SJ,Rodman DJ,Bharali DJ,Prasad PN

更新日期：2004-12-01 00:00:00

abstract：:In the previous report, microencapsulation of lipase employing a (w/o)/w multiple phase emulsion technique, with 2:1 polystyrene (PS)-SBR mixture being used as a wall material, was proposed. Catalysis of the encapsulated enzyme was investigated, and the hydrolysis of triacetin (triglyceride of acetic acid) was success...

journal_title：Journal of microencapsulation

authors： Iso M,Shirahase T,Hanamura S,Urushiyama S,Omi S

更新日期：1989-07-01 00:00:00

abstract：:Biodegradable polymers for localized delivery of antibiotics have emerged as an important approach to treating orthopaedic infections. In chronic forms of osteomyelitis which are thought to be associated with bacterial biofilm, localized delivery of a suitable antibiotic is desirable. This paper describes the formulat...

journal_title：Journal of microencapsulation

authors： Habib M,Onyilofor S,Ebube NK,Owusu-Ababio G

更新日期：1999-01-01 00:00:00

abstract：:The preparation of dipyridamole (DIP) alginate (alg) microspheres by different methods or the incorporation of tragacanth (trgh), pectin or Eudragit L-100 55 (Eud) in alg microsphere formulations did not provide a prolonged release of DIP at pH 1.2. Tabletted microsphere formulations containing alg, trgh, pectin, sodi...

journal_title：Journal of microencapsulation

authors： Gürsoy A,Karakuş D,Okar I

更新日期：1999-07-01 00:00:00

abstract：:Moisture curing type self-healing microcapsules become more attractive, while instability of active core material crippled the efficiency of self-healing behaviour. Polyurea (PU)/melamine formaldehyde (MF) double-layered self-healing microcapsules containing isophorone diisocyanate (IPDI) core with high and stable cor...

journal_title：Journal of microencapsulation

authors： Ming Y,Hu J,Xing J,Wu M,Qu J

更新日期：2016-06-01 00:00:00

abstract：:This study explored a liquid phase coating technique to produce polymethyl methacrylate (PMMA)-coated alginate microspheres. Alginate microspheres with a mean diameter of 85.6 microm were prepared using an emulsification method. The alginate microspheres, as cores, were then coated with different types of PMMA by a li...

journal_title：Journal of microencapsulation

authors： Chan LW,Liu X,Heng PW

更新日期：2005-12-01 00:00:00

abstract：:Phosphatidylcholine (from egg yolk)-cholesterol-stearylamine (7:2:2.25, molar ratio) liposomes when associated with cyclosporin A (phosphatidylcholine:cyclosporin A = 2:0.07, molar ratio) do not inhibit significantly the biosynthesis of [3H]polyglycerophosphatides and [3H]phosphatidylinositol in mitochondrial and micr...

journal_title：Journal of microencapsulation

authors： Stuhne-Sekalec L,Stanacev NZ

更新日期：1989-04-01 00:00:00