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Optimization of Caesalpinia sappan L. heartwood extraction procedure to obtain the highest content of brazilin and greatest antibacterial activity

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Journal of Integrative Medicine 2019年第5期17卷 351-358页

作者： Sukanya Settharaksa chaowalit monton Laksana Charoenchai Drug and Herbal Product Research and Development Center College of Pharmacy Rangsit University

Objective: The objective of the work was to optimize the extraction conditions of Caesalpinia sappan *** in order to maximize the brazilin content and antibacterial activity of the ***: Two independent factors were studied: extraction temperature(45–95 °C) and extraction time(30–60 min). In addition, five dependent factors were monitored, including extraction yield, brazilin content, and clear zones against Staphylococcus aureus TISTR 1466, Staphylococcus epidermidis TISTR 518 and Propionibacterium acnes DMST 14961. The brazilin content was quantified by high-performance liquid chromatography and antibacterial activity was determined by disk diffusion ***: The high temperature provided high total extract yield as well as brazilin content, while extraction time had little effect on yield or brazilin content. Extraction time had a positive effect, while extraction temperature had little effect on clear zone against S. aureus. The largest clear zone against S. epidermidis was achieved at low extraction temperature and long extraction time. Conversely, short extraction time and high extraction temperature provided the largest clear zone against P. acnes. The optimal conditions providing the highest brazilin content was an extraction temperature and extraction time of 95 °C and 30 min, *** same optimal conditions also provided the simultaneous greatest antibacterial activity against the three bacteria. Modeled optimal conditions were validated be conducting extraction using these values. Yield and antibacterial activity of the resulting extract demonstrated that the model had a low percentage ***: The optimal condition will be used as a standard condition for extraction of C. sappan heartwood to maximize brazilin content and antibacterial activity.

关键词： Antibacterial activity Brazilin Caesalpinia sappan Optimization

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Evaluation of blank film forming polymeric dispersions based on Eudragit RL 30D and RS30D for transdermal drug delivery

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Asian Journal of Pharmaceutical Sciences 2016年第1期11卷 100-101页

作者： chaowalit monton Jirapornchai Suksaeree The Herbal Medicinal Products Research and Development Center Faculty of PharmacyRangsit UniversityPathum Thani 12000Thailand Department of Pharmaceutical Chemistry Faculty of PharmacyRangsit UniversityPathum Thani 12000Thailand

The first approved transdermal drug delivery system in the United States in 1979 is a scopolamine patch for treatment of motion sickness. Transdermal drug delivery system has many advantages over oral route such as it is useful for vomiting and unconscious patients. It can avoid first pass metabolism by the liver. It is non-invasive way and self-administered system compared to injections. The film forming polymeric solutions are a novel transdermal drug delivery system. This system consists of an active drug, film forming polymer, plasticizer.

关键词： Film forming polymeric dispersions Eudragit Transdermal drug delivery

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Swelling behavior of polyvinyl alcohol and lactic acid hydrogel films

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Asian Journal of Pharmaceutical Sciences 2016年第1期11卷 102-103页

作者： Jirapornchai Suksaeree Chitradee Luprasong chaowalit monton Department of Pharmaceutical Chemistry Faculty of PharmacyRangsit UniversityMuangPathum Thani 12000Thailand Sino-Thai Traditional Medicine Research Center(Cooperation between Rangsit University Harbin Institute of TechnologyHeilongjiang University of Chinese Medicine)Faculty of PharmacyRangsit UniversityMuangPathum Thani 12000Thailand Sun Herb Thai Chinese Manufacturing Plant Faculty of PharmacyRangsit UniversityMuangPathum Thani 12000Thailand

Hydrogel films are the thin-film formation that can absorb the water or biological fluids shown as hydrated polymer *** films have a potential as carriers for bioactive macromolecules,wound dressing,and controlled drug *** alcohol(PVA)is a biodegradable and biocompatible synthetic polymer which has been widely used in pharmaceutical *** work aims to study the swelling behavior of hydrogel films prepared from PVA and lactic acid(LA)intended to use as drug delivery system.

关键词： Hydrogel films Lactic acid Polyvinyl alcohol Swelling

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Swelling and deswelling kinetics of polyvinyl alcohol and lactic acid hydrogel films

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Asian Journal of Pharmaceutical Sciences 2016年第1期11卷 106-107页

作者： Natawat Chankana Chitradee Luprasong chaowalit monton Jirapornchai Suksaeree The Herbal Medicinal Products Research and Development Center(Cooperation between Rangsit University Harbin Institute of Technologyand Heilongjiang University of Chinese Medicine)Faculty of PharmacyRangsit UniversityMuangPathum Thani 12000Thailand Sun Herb Thai Chinese Manufacturing Plant Faculty of PharmacyRangsit UniversityMuangPathum Thani 12000Thailand Department of Pharmaceutical Chemistry Faculty of PharmacyRangsit UniversityMuangPathum Thani 12000Thailand

In this work, we studied the swelling and deswelling kinetics of polyvinyl alcohol (PVA) and lactic acid (LA) hydrogel films between distilled water and acetone phase. The hydrogel films were prepared by dissolve 5.0 g of PVA in hot water. Then, 7.5 g LA solution was slowly added into the clearly PVA solution at room temperature. After that, the mixture solution was subsequently cured in an oven for different curing times at 100°C.

关键词： Hydrogel films Swelling Deswelling

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Zingiber cassumunar blended patches for skin application:Formulation,physicochemical properties,and in vitro studies

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Asian Journal of Pharmaceutical Sciences 2015年第4期10卷 341-349页

作者： Jirapornchai Suksaeree Laksana Charoenchai Fameera Madaka chaowalit monton Apirak Sakunpak Tossaton Charoonratana Wiwat Pichayakorn Department of Pharmaceutical Chemistry Faculty of PharmacyRangsit UniversityMuangPathum Thani 12000Thailand Sino-Thai Traditional Medicine Research Center(Cooperation between Rangsit University Harbin Institute of Technologyand Heilongjiang University of Chinese Medicine)Faculty of PharmacyRangsit UniversityMuangPathum Thani 12000Thailand Department of Pharmacognosy Faculty of PharmacyRangsit UniversityMuangPathum Thani 12000Thailand Department of Pharmaceutical Technology Faculty of Pharmaceutical SciencesPrince of Songkla UniversityHat-YaiSongkhla 90112Thailand Medical Products Innovations from Polymers in Clinical Use Research Unit Prince of Songkla UniversityHat-YaiSongkhla 90112Thailand

Our work was to study the preparation,physicochemical characterization,and in vitro characteristic of Zingiber cassumunar blended *** *** blended patches incorporating *** *** known as Plai were prepared from chitosan and polyvinyl alcohol with glycerin as *** were prepared by adding all ingredients in a beaker and homogeneously mixing ***,they were transferred into Petri-dish and dried in hot air *** hydrophilic nature of the *** blended patches was confirmed by the moisture uptake,swelling ratio,erosion,and porosity *** FTIR,DSC,XRD,and SEM studies showed revealed blended patches with amorphous region that was homogeneously smooth and compact in both surface and cross section *** exhibited controlled the release behavior of(E)-4-(30,40-dimethoxyphenyl)but-3-en-lol(compound D)that is the main active compound in *** for anti-inflammation ***,in in vitro skin permeation study,the compound D was accumulated in newborn pig skin more than in the receptor ***,the blended patches showed the suitable entrapment and controlled release of compound ***,we have demonstrated that such chitosan and polyvinyl alcohol formulated patches might be developed for medical use.

关键词： Chitosan Polyvinyl alcohol Z.cassumunar patches Blended patches Skin application

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Quantitative analysis of γ-oryzanol content in cold pressed rice bran oil by TLC-image analysis method

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Asian Pacific Journal of Tropical Biomedicine 2014年第2期4卷 119-123页

作者： Apirak Sakunpak Jirapornchai Suksaeree chaowalit monton Pathamaporn Pathompak Krisana Kraisintu Faculty of Pharmacy Rangsit University.Pathum Thani12000.Thailand Sino-Thai Traditional Medicine Research Center.Herbal Medicinal Products Research and Development Center(Cooperation between Rangsit University and Harbin Institute of Technology and Heilongjiang University of Chinese Medicine) Rangsil UniversityPathum Thani.12000Thailand Faculty of Oriental Medicine.Rangsit University Pathum Thani.12000Thailand

Objective:To develop and validate an image analysis method for quantitative analysis ofγ-oryzanol in cold pressed rice bran ***:TLC-densitometric and TLC-image analysis methods were developed,validated,and used for quantitative analysis of γ-oryzanol in cold pressed rice bran *** results obtained by these two different quantification methods were compared by paired ***:Both assays provided good linearity,accuracy,reproducibility and selectivity for determination of γ-***:The TLC-densitomelric and TLC-image analysis methods providett a similar reproducibility,accuracy and selectivity for the quantitative determination of γ-oryzanol in cold pressed rice bran oil.A statistical comparison of the quantitative determinations of γ-oryzanol in samples did not show any statistically significant difference between TLC-densitometric and TLC-image analysis *** both methods were found to be equal,they therefore can be used for the determination of γ-oryzanol in cold pressed rice bran oil.

关键词： γ-Oryzanol TLC-densitometric method TLC-image analysis method Rice bran oil Quantitative analysis

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Effect of Process Parameters on Morphology and Grain Refinement Efficiency of TiAl_3 and TiB_2 in Alumimum Casting

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Journal of Materials Science & Technology 2008年第1期24卷 54-56页

作者： Prapas Kunnam chaowalit Limmaneevichitr National Metal and Materials Technology Center Thailand Science Park Klong 1Klong LuangPathumthani12120 Thailand Production Engineering Department Faculty of Engineering King Mongkut's University of Technology ThonburiBangmodTungkhruBangkok10140 Thailand

This paper presents the effects of different process parameters in producing Al-STi-1B grain refiner,*** sequences and reaction time,on grain refinement efficiency of aluminum *** was found that different process parameters resulted in different morphology and size distribution of TiAl-3 and TiB-2 in grain refiner. The experiment was carried out by adding KBF-4 and K-2TiF-6 to molten *** melting temperature was controlled at 800℃in an electric resistance *** different sequences of KBF-4 and K-2TiF-6 additions were applied,i.e.,adding KBF-4 before K-2TiF-6,adding K-2TiF-4 before KBF-4 and mixing both KBF-4 and K-2TiF-6 before adding to molten *** different holding time at 1 min,30 min and 60 min were *** results showed that no significant difference of morphology and size distribution was found by varying three different ***,the different holding time provided major differences in both morphology and size distribution,which are technically expectable from diffusion and agglomeration between particles resulting in larger particle size and wider range of size distribution of TiAI3 and *** the reaction time was longer than 30 rain,morphology of both TiAl-3 and TiB-2 became too *** the reaction time was too short,less reaction between TiAl-3 and TiB2 to form would be *** grain refinement efficiency, it was found that mixing KBF-4 and K-2TiF-6 before adding to molten aluminum with a holding time of 30 min resulted in best grain refinement efficiency.

关键词： Grain refinement Process parameters TiAl3 TiB2 K2TiF6 KBF4

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Effect of Sc on Precipitation Hardening of AlSi6Mg Alloy

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Journal of Materials Science & Technology 2008年第1期24卷 17-20页

作者： Wattanachai Prukkanon Satit Chanpum chaowalit Limmaneevichitr School of Energy Environment and Materials King Mongkut's University of Technology ThonburiBangkok10140Thailand Production Engineering Department Faculty of Engineering King Mongkut's University of Technology ThonburiBangkok10140Thailand

The effect of Sc on precipitation hardening of AlSi6Mg was *** was previously reported that it increased the effectiveness of Sc in wrought aluminum in many areas so Zr was also used together with Sc in this study. Different levels of Sc and Zr additions were added to AlSi6Mg before casting in the permanent *** samples were precipitation hardened at different aging temperatures and for various aging time before testing for tensile strength and *** was found that Sc addition into Al6SiMg can change its response to age *** of Sc and Sc with Zr increased both yield strength and hardness for both aging *** addition,Sc was found to modify eutectic Si to obtain fibrous *** effect of Sc on eutectic silicon modification has never been reported before.

关键词： Scandium Zirconium Mechanical property Aluminum alloy Age hardening Modification

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Microstructure and rheological properties of a semisolid A356 alloy with erbium addition

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Journal of Rare Earths 2022年第7期40卷 1148-1155页

作者： Chaiyawat Peeratatsuwan Phromphong Pandee Ussadawut Patakham chaowalit Limmaneevichitr Department of Production Engineering Faculty of EngineeringKing Mongkut's University of Technology ThonburiBangmodTungkhruBangkok10140Thailand Center for Lightweight Materials Design and ManufacturingKing Mongkut's University of Technology ThonburiBangmodTungkhruBangkok10140Thailand National Metal and Material Technology Center National Sciences and Technology Development AgencyThailand Science ParkKlong LuangPathumthani12120Thailand

The effects of erbium addition on the rheological properties and microstructure of a semisolid A356 alloy were *** semisolid slurries were prepared through the serpentine channel technique before they were thixoformed using parallel-plate compre ssion with cylindrical *** grain and globule size decreases as the Er content increases,resulting in an improved and uniform distribution of spherical primaryα-Al phase within the semisolid *** addition of the Er modifies the grain morphology and size of theα-Al grains,resulting in a better and more uniform distribution of spherical primaryα-AI phase within the semisolid *** a result,rheocast quality index increases with the addition of Er,which is suitable for the thixoforming *** A356 alloy without Er has the highest viscosity *** viscosity decreases,and the flow characteristics of the semisolid feedstock are expected to improve when Er is added as a result of the refinement of primary a-Al and modification of eutectic ***,the refined semisolid A356 alloys with Er show a slightly larger fraction of highangle grain boundaries compared to that for the unrefined alloy.

关键词： Erbium Thixoforming Serpentine channel Hypoeutectic Al-Si alloy Parallel-plate compression Rare earths

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Effect of Alloying Element Antimony on Macrostructural and Microstructural Development in A356 Alloy Directionally Solidified under Unsteady-state Conditions

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Journal of Materials Science & Technology 2008年第1期24卷 25-28页

作者： Supparerk Boontein Julathep Kajornchaiyakul chaowalit Limmaneevichitr School of Energy Environment and Materials King Mongkut's University of Technology ThonburiBangkokThailand Materials Technology for Manufacturing Design and Product Development National Metal and Materials Technology CenterPrathumthaniThailand Production Engineering Department Faculty of Engineering King Mongkut's University of Technology ThonburiBangkokThailand

Microstructure development is well accepted to have a major effect on mechanical properties during its services. One of the most interesting ways to improve mechanical properties is to reduce secondary dendrite arm spacing （SDAS）.SDAS also plays an important role in controlling and providing the well distributed and fine microstructure resulting in better tensile strength and *** reduce SDAS,it is commonly known by increasing cooling rate and increasing interface instability by limited-soluble alloy *** is,however, unclear that how both cooling rate and limited-soluble alloy,***,relate to each *** may be the reason that the limited-soluble alloy may not effectively reduce *** better understand this phenomenon, influences of Sb on solid/liquid interface instability using columnar to equiaxed transition （CET） were studied in the directionally solidification *** macrographs and micrographs,it was observed that at 0.06-0.18 wt pct Sb the CET min,CET max,CET zone and %CET area gradually *** increases of CET max and CET zone in samples with 0.06 to 0.18 wt pct Sb addition results from recalesced *** the other hand,the variations of CET max and CET zone in samples with 0.24 to 0.30 wt pct Sb results from equiaxed grain formations that prohibit the growth of columnar grain and latent heat from intermetallic phase solidified.

关键词： Directional solidification Antimony Al-Si alloy

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