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Narathiwat, Thailand

Princess of Naradhiwas University is a government sponsored university in Narathiwat, southern Thailand. It was founded under the act on 9 February 2005 by merging all educational institutions in the province together. Those institutions are Narathiwat Technical College, Narathiwat Agricultural & Technology College, Takbai vocational college and Boromarjonani College of Nursing, Narathiwat.The main objectives of the amalgamation are to utilize the resources most effectively with the lowest investment, to give the opportunity for local students to get education in university and to respond to the local people’s desires for education. If the objectives are achieved, the quality of people would be improved in that all have jobs to do and the local economy would be developed.The name of the university was granted by Bhumibol Adulyadej in honor of his sister Galyani Vadhana. Wikipedia.


Mekarat S.,Princess of Naradhiwas University | Pakawatchai C.,Prince of Songkla University | Saithong S.,Princess of Naradhiwas University
Acta Crystallographica Section E: Structure Reports Online | Year: 2014

In the title salt, [Ag(C7H8N2S)(C 18H15P) 2]NO3, the coordination geometry about the AgI atom is shallow trigonal pyramidal, with the metal atom displaced by 0.372 (1) Åfrom the plane of the P and S atoms. In the crystal, the cations are linked to the anions by N-H⋯O hydrogen bonds, generating tetramers (two cations and two anions), which feature R2 2(8) and R4 4(8) loops. The cations are linked by weak C-H⋯-interactions, generating a three-dimensional network. Source


Thanachayanont C.,National Metal and Materials Technology Center | Yordsri V.,National Metal and Materials Technology Center | Kijamnajsuk S.,National Metal and Materials Technology Center | Binhayeeniyi N.,Princess of Naradhiwas University | Muensit N.,Prince of Songkla University
Materials Letters | Year: 2012

Microstructure is known to be one of the most important factors affecting dielectric constant, Curie temperature, electrical conductivity and breakdown voltage of Ba(Zr xTi 1 - x)O 3 (BZT) powders. Grain sizes of sol-gel derived BZT are known to be much smaller than those prepared by solid-state reaction enabling low sintering temperatures to be used during subsequent processing. In this study, crystal structures of Ba(Zr xTi 1 - x)O 3, x = 0, 0.05, 0.10, 0.15 and 0.20, prepared by the sol-gel technique were investigated using Rietveld refinement X-ray Diffraction (XRD) and convergent beam electron diffraction (CBED). Lattice parameters obtained from XRD were used for CBED pattern simulation. The experimental CBED patterns taken from individual grains matched well with the simulated results. Morphology of the BZT powders was investigated using transmission electron microscopy (TEM). It was found that as the zirconium content increased, both c- and a-lattice constants gradually increased. The tetragonality (c/a) decreased to almost unity at x = 0.15 which was smaller than the value x = 0.20 previously reported for the BZT powders prepared by mixed oxide method. Hence, the nano-grain sizes ranging from 133.4 to 214.8 nm in the sol-gel BZT powders were found to modify the Zr content, x, needed to promote the phase transition from the tetragonal to cubic lattice structure. © 2012 Elsevier B.V. All rights reserved. Source


Kantachote D.,Prince of Songkla University | Nunkaew T.,Princess of Naradhiwas University | Kantha T.,Prince of Songkla University | Chaiprapat S.,Prince of Songkla University
Applied Soil Ecology | Year: 2016

Flooded rice fields either organic or saline share common problems of low productivity and emission of methane (CH4) that contributes to global warming. Among various biofertilizers, purple nonsulfur bacteria (PNSB) are of good candidates to solve such problems since they could promote rice growth and yield, and also compete with methane producing bacteria for substrates. The goals of this work were to investigate the potential of Rhodopseudomonas palustris strains TN114, PP803 and TK103 identified as a biofertilizer to enhance rice yield and reduce CH4 emissions in both types of the rice fields. The efficiency of each PSNB biofertilizer were compared with a commercial organic fertilizer (COF), a carrier control (carrier with no added PNSB), and control without the addition of any fertilizer (control). In both paddy fields, no significant difference in the growth of rice was found based on the maximal height of plants, but there was a significant difference in rice grain yields. In saline paddy field, all PNSB biofertilizers produced higher grain yield at statistically significant level; however, in the organic paddy field only TN114 biofertilizer showed a promising result at 48% increase followed by COF treatment. The lowest grain yield was observed in both controls. COF treatment generated the highest CH4 emissions followed by both controls, and the least was in PNSB biofertilizer treatments, particularly PP803 which was 24% and 28% lower than COF in organic and saline paddy fields, respectively. Both paddy fields showed a strong negative correlation between PNSB cell density and CH4 emissions (rp=-0.90). It can be concluded that all biofertilizers from the selected R. palustris were able to enhance rice yields in both the organic and saline flooded paddy fields and concurrently reduce CH4 emissions. © 2016 Elsevier B.V. Source


Satthakarn S.,Prince of Songkla University | Hladik F.,University of Washington | Hladik F.,Fred Hutchinson Cancer Research Center | Promsong A.,Princess of Naradhiwas University | And 2 more authors.
BMC Complementary and Alternative Medicine | Year: 2015

Background: Vaginal epithelial cells (VECs) produce antimicrobial peptides including human β-defensin 2 (hBD2) and secretory leukocyte protease inhibitor (SLPI), as well as cytokines and chemokines that play vital roles in mucosal innate immunity of the female reproductive tract. Houttuynia cordata Thunb (H. cordata), a herbal plant found in Asia, possesses various activities including antimicrobial activity and anti-inflammation. As inflammation and infection are commonly found in female reproductive tract, we aimed to investigate the effects of H. cordata water extract in modulating innate immune factors produced by VECs. Methods: Primary human VECs were cultured and treated with H. cordata at a concentration ranging from 25-200 μg/ml for 6 or 18 h. After treatment, the cells and culture supernatants were harvested. The expression of hBD2 and SLPI mRNA was evaluated by quantitative real-time reverse transcription PCR. Levels of secreted hBD2 and SLPI as well as cytokines and chemokines in the supernatants were measured by ELISA and Luminex assay, respectively. Cytotoxicity of the extract on VECs was assessed by CellTiter-Blue Cell Viability Assay. Results: H. cordata did not cause measurable toxicity on VECs after exposure for 18 h. The expression of hBD2 and SLPI mRNA as well as the secreted hBD2 protein were increased in response to H. cordata exposure for 18 h when compared to the untreated controls. However, treatment with the extract for 6 h had only slight effects on the mRNA expression of hBD2 and SLPI. The secretion of IL-2 and IL-6 proteins by VECs was also increased, while the secretion of CCL5 was decreased after treatment with the extract for 18 h. Treatment with H. cordata extract had some effects on the secretion of IL-4, IL-8, CCL2, and TNF-aα, but not statistically significant. Conclusions: H. cordata water extract modulates the expression of antimicrobial peptides and cytokines produced by VECs, which play an important role in the mucosal innate immunity in the female reproductive tract. Our findings suggest that H. cordata may have immunomodulatory effects on the vaginal mucosa. Further studies should be performed in vivo to determine if it can enhance mucosal immune defenses against microbial pathogens. © Satthakarn et al. 2015. Source


Radenahmad N.,Prince of Songkla University | Saleh F.,Imam Muhammad ibn Saud Islamic University | Sayoh I.,Princess of Naradhiwas University | Sawangjaroen K.,Prince of Songkla University | And 4 more authors.
BMC Complementary and Alternative Medicine | Year: 2012

Background: Estrogen has been reported to accelerate cutaneous wound healing. This research studies the effect of young coconut juice (YCJ), presumably containing estrogen-like substances, on cutaneous wound healing in ovairectomized rats.Methods: Four groups of female rats (6 in each group) were included in this study. These included sham-operated, ovariectomized (ovx), ovx receiving estradiol benzoate (EB) injections intraperitoneally, and ovx receiving YCJ orally. Two equidistant 1-cm full-thickness skin incisional wounds were made two weeks after ovariectomy. The rats were sacrificed at the end of the third and the fourth week of the study, and their serum estradiol (E2) level was measured by chemiluminescent immunoassay. The skin was excised and examined in histological sections stained with H&E, and immunostained using anti-estrogen receptor (ER-α an ER-β) antibodies.Results: Wound healing was accelerated in ovx rats receiving YCJ, as compared to controls. This was associated with significantly higher density of immunostaining for ER-α an ER-β in keratinocytes, fibroblasts, white blood cells, fat cells, sebaceous gland, skeletal muscles, and hair shafts and follicles. This was also associated with thicker epidermis and dermis, but with thinner hypodermis. In addition, the number and size of immunoreactive hair follicles for both ER-α and ER-β were the highest in the ovx+YCJ group, as compared to the ovx+EB group.Conclusions: This study demonstrates that YCJ has estrogen-like characteristics, which in turn seem to have beneficial effects on cutaneous wound healing. © 2012 Radenahmad et al.; licensee BioMed Central Ltd. Source

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