bluuebunny/crossref_metadata_2025 huggingface dataset:
Study of Visfatin Level in Type 1 Diabetic Children and Adolescents
Authors: El Samahi Mona H. , Ismail Nagwa Abdallah , Matter Randa M. , Selim Abeer , Ibrahim Alshaymaa Ahmed , Nabih Walaa
Published: June 2017

BACKGROUND: Visfatin is an intracellular enzyme, known as nicotinamide phosphoribosyltransferase (Nampt) and pre-B-cell colony-enhancing factor (PBEF-1). It has insulin-mimetic effects and lowers plasma glucose levels.AIM: The aim of the work was to assess serum concentration of Visfatin in type 1 diabetic children and adolescents and study its relationships with duration of diabetes, body mass index (BMI), glycemic control, insulin dosage, lipid profile and microvascular complications.MATERIAL AND METHODS: Fifty children and adolescents with type 1 diabetes mellitus were recruited with 30 ages and gender-matched healthy subjects. They were subjected to history taking; anthropometric measurements and chronic diabetic complications were recorded if present. Laboratory analysis included urinary microalbumin, serum triglycerides, HDL, LDL, cholesterol, fasting blood glucose, glycosylated Hb (HbA1c) and serum visfatin which was measured with enzyme-linked immunosorbent assay.RESULTS: Diabetic patients showed highly significant decrease in the level of visfatin compared to the control group (P = 0.0001).There was significant further decrease in visfatin level in diabetics with microalbuminuria (n = 13) compared to normoalbuminuric patients (n = 37) (P = 0.015). There was highly significant inverse correlation between visfatin level with age (r = -0.379, p = 0.007), BMI (r = -0.418, p = 0.003), waist circumference (r = -0.430, p = 0.002), hip circumference (r = -0.389, p = 0.005) and microalbuminuria (r = -0.323, p = 0.022).CONCLUSIONS: Type 1 diabetic children and adolescents had a significantly lower visfatin level compared to controls. A marked decrease in the level of visfatin was shown in patients with microalbuminuria with an inverse correlation with BMI suggesting an important role of visfatin in the pathogenesis of type 1 diabetics and type 1 diabetic nephropathy.
Correlation between Serum Homocysteine and Vitiligo Area Scoring Index
Authors: Hasibuan Dina R. U. , Putra Imam B. , Jusuf Nelva K.
Published: June 2017

Background: Vitiligo is a chronic skin disorder. White macules caused by melanocyte destruction is a characteristic finding that cosmetically disturbing. Until recently, pathogenesis of vitiligo is still unclear. The role of homocysteine in vitiligo is mentioned in previous studies thus it is probable that it can be a biomarker to determine vitiligo severity.Â Aim : To determine correlation between serum homocysteine and vitiligo area scoring index (VASI)Subject and method: This was a cross-sectional analytic study which involved 30 vitiligo patients that were diagnosed by clinical and Woodâ€™s lamp examinations then VASI score was determined and same numbers of control. We conducted blood sampling and measurement of serum homocysteine level to the patients.Results: There is no significant correlation between serum homocysteine and VASI score (p= 0,133, r= 0,281), family history (p=0,447), and duration of vitiligo (p= 0,993, r= 0,002). There is no significant difference between serum homocysteine in vitiligo patients and controls (p= 0,191). There is a correlation between serum homocysteine with gender (p= 0,001) and age (p= 0,036;r= 0,385) Â in vitiligo patient but not in controls (p= 0,266), (p= 0,872; r= 0,031). There is a correlation between serum homocysteine and types of vitiligo.Â Conclusion: There is no significant correlation between serum homocysteine and VASI score, family history, and duration of vitiligo. There is no significant difference between serum homocysteine in vitiligo patients and controls. There is a correlation between serum homocysteine with gender and age in vitiligo patients.
Acute Postoperative Pain in Trauma Patients - The Fifth Vital Sign
Authors: FarÄiÄ‡ Nikolina , BaraÄ‡ Ivana , PaÄariÄ‡ Stana , LovriÄ‡ Ivana , Ilakovac Vesna
Published: June 2017

AIM: To determine average pain intensity perceived by trauma patients at hospital admission, lowest and highest pain intensity during their hospitalisation and their satisfaction with provided pain treatment.PATIENTS AND METHODS: The research included 114 operated patients at the Clinical Department of Trauma Surgery. We used the standard Numerical Rating Scale (NRS) for a clinical measure of pain.RESULTS: The average pain intensity at hospital admission was NRS median 7 (range 4â€“10), the severest perceived rate of pain during hospitalisation was NRS median 5 (range 4â€“7). Ninety-four percent of our respondents were satisfied with provided pain treatment. Thirty-two percent of patients were not asked to assess their pain during their hospitalisation, and 40.4% of patients assessed their pain occasionally.CONCLUSION: Female patients, as well as patients admitted to the emergency department, reported higher NRS scores. Those respondents who perceived severe pain answered more often that medical staff didnâ€™t ask them to assess their pain on any occasion. Good communication between medical staff and patients, together with adequate assessment and evaluation of acute pain are of great importance in its treatment.
The Role of Sleeve Gastrectomy on Preventing Type 2 Diabetes Mellitus
Authors: Olt Serdar , Ã–zdaÅŸ Sabri , Åžirik Mehmet
Published: June 2017

AIM: To investigate the effect of bariatric surgery on HbA1c and serum cortisol levels in morbidly obese patients without type 2 diabetes mellitus.MATERIALS AND METHODS: Twenty-nine patients who underwent sleeve gastrectomy and whose body mass index was> 40 were included in the present study. Patients' files were reviewed retrospectively. Those with diabetes mellitus and those with age <18 were excluded from the study. Pre-operative and 1-year post operative data were documented. The obtained data were analysed by SPSS statistical program.RESULTS: The mean age of the patients was 27.4 Â± 8.4. 5 of the patients were male, and 24 were female. The mean body mass index of the patients was 44 Â± 2.3. 1 patient [3.4%] had hypertension. Four patients [13.7%] had gastroesophageal reflux disease. The number of smokers was 7 [24.1%], and the number of alcohol users was 3 [10.3%]. There was a statistically significant decrease in HbA1c, body mass index values after operation [p value <0.01], but cortisol was not different [p value = 0.72].CONCLUSION: In this present study we found that bariatric surgery caused a significant decrease in HbA1c levels in non-diabetic patients, suggesting that bariatric surgery may prevent Type 2 Diabetes Mellitus in obese patients.
Maxillary Sinus Augmentation Using a Titanium Mesh: A Randomized Clinical Trial
Authors: Bahaa-Eldin Khalid , Mostafa Basma , Nasry Sherine , Reda Ahmed , Shoeib Mona
Published: June 2017

BACKGROUND: Various attempts have been implemented using different materials and techniques to augment the maxillary sinus floor for prospect dental implant positioning.AIM: This contemplate was conducted to assess the osteogenic capability of the maxillary sinus in a two-step sinus membrane elevation using titanium mesh to keep the formed space to place dental implants in atrophic ridges.MATERIALS AND METHODS: Titanium micromesh was customized and positioned into the sinus on one side to preserve the elevated membrane in position. On the other side xenograft was applied. Instant and 6-months postoperative cone beam computed tomography (CBCT) was done to assess the gained bone height and density. Bone core biopsies were obtained during implant placement for histological and histomorphometric evaluation.RESULTS: The average bone height values increased in both groups. Meanwhile the average bone density value was higher at the graft group than the titanium mesh group. Histological and histomorphometric evaluation presented the average bone volume of the newly formed bone in the graft group which is superior to that of the titanium mesh group.CONCLUSION: The use of the titanium micromesh as a space-maintaining device after Schneiderian membrane elevation is a trustworthy technique to elevate the floor of the sinus without grafting.
Association of the Pro12Ala Polymorphism with the Metabolic Parameters in Women with Polycystic Ovary Syndrome
Authors: Zaki Moushira , Hassan Naglaa , El-Bassyouni Hala T. , Kamal Sanaa , Basha Walaa , Azmy Osama , Amr Khalda
Published: June 2017

AIM: To investigate the association of peroxisome proliferator-activated receptor gamma (PPARG) Pro12Ala polymorphism with polycystic ovary syndrome (PCOS) and its effect on the metabolic parameters in PCOS women.METHODS: The study used PCR to identify the presence of the PPARG Pro12Ala polymorphism in 100 PCOS women and 120 age-matched healthy women. All participants were subjected to anthropometry, biochemical and metabolic evaluation.RESULTS: Significant difference in the genotypes distributions of PPARG Pro12Ala polymorphism was observed among PCOS women and controls (p = 0.03). The frequency of the polymorphic allele Ala was significantly higher in PCOS cases than that in the controls (OR = 2.01, p = 0.01). The carries of the variant allele Ala in PCOS women showed significant higher values in body mass index (BMI), systolic and diastolic blood pressure, waist circumference, waist to hip ratio, sum of skin folds, fasting blood glucose, fasting blood insulin, HOMA-IR, fasting triglycerides, total cholesterol and low-density lipoprotein than non-carriers.CONCLUSION: The PPARG Pro12Ala polymorphism might contribute to the risk of PCOS and abnormal metabolic parameters and could be considered as a biomarker for early diagnosis and clinic prediction of metabolic complications.
Comparison of Ranibizumab and Bevacizumab for Macular Edema Secondary to Retinal Vein Occlusions in Routine Clinical Practice
Authors: Khan Mehnaz , Wai Karen M. , Silva Fabiana Q. , Srivastava Sunil , Ehlers Justis P. , Rachitskaya Aleksandra , Babiuch Amy , Deasy Ryan , Kaiser Peter K. , Schachat Andrew P. , Yuan Alex , Singh Rishi P.
Published: June 2017

BACKGROUND AND OBJECTIVE:

To determine outcomes of intravitreal ranibizumab (IVR) (Lucentis; Genentech, South San Francisco, CA) versus bevacizumab (IVB) (Avastin; Genentech, South San Francisco, CA) for treatment of macular edema (ME) secondary to retinal vein occlusion (RVO) in routine clinical practice.

PATIENTS AND METHODS:

A retrospective study identified treatment-naïve patients with ME secondary to RVO where treatment with either IVB or IVR was initiated. Retreatment criteria were based on ophthalmic examination and/or spectral-domain optical coherence tomography findings.

RESULTS:

Central RVO/hemi-RVO cohort: At 12 months, change in visual acuity (VA) (IVR: +12.9 letters, IVB +6.9 letters;
P
= .53), central subfield thickness (CST) (IVR: −144.1 μm, IVB: −153.9 μm;
P
= .88), and number of injections (IVR: 5.40 injections, IVB: 5.64 injections;
P
= .70) were not different between groups. Branch RVO cohort: At 12-month follow-up, no differences in change in VA (IVR: +15.2 letters, IVB: +10.6 letters;
P
= .46), CST (IVR: −23.1 μm, IVB: −91.4 μm;
P
= .16), or number of injections (IVR: 5.93 injections, IVB: 5.13 injections;
P
= .15) were noted.

CONCLUSION:

There is no notable difference in outcome between IVR and IVB when treating ME from RVO in routine clinical practice.

[
Ophthalmic Surg Lasers Imaging Retina.
2017;48:465–472.]
Outpatient, Wide-Field, Digital Imaging of Infants With Retinopathy of Prematurity
Authors: Arnold Robert W. , Grendahl Robin L. , Kevin Winkle R. , Jacob Jack
Published: June 2017

Eight infants were closely monitored for retinopathy of prematurity (ROP) while in the neonatal intensive care unit (NICU); two required laser therapy. After discharge from the NICU, they had outpatient examination with dilated, scleral depressed ROP staging, and each had digital widefield retinal imaging (Optos, Dunfermline, United Kingdom) without lid speculum, or with lid speculum if not cooperative. Images were shared remotely using ROP-Check software (Glacier Medical Software, Anchorage, AK), from which ophthalmologists made clinical impressions. The images did not afford clear view of maturity to the ora serrata; however, posterior zone 3 was viewed, and confirmation that each eye did not need therapy was consistent. Outpatient wide-field retinal imaging may help facilitate telemedicine for ROP.

[

Ophthalmic Surg Lasers Imaging Retina
. 2017;48:494–497.

]
«Gobernar el Mundo». La polémica Mare Liberum versus Mare Clausum en las Indias Orientales (1603-1625)
Authors: Martínez Torres José Antonio
Published: June 2017

La captura en 1603 de la nave portuguesa Santa Catarina por los marinos holandeses de la Compañía de las Indias Orientales (1602) en el océano Índico, dio origen a una disputa político-intelectual por la libertad y el dominio del mar que enfrentó a algunos de los mejores publicistas de Holanda (Hugo Grocio) y de la Monarquía Hispánica (Serafín de Freitas). Esta controversia, que hunde sus raíces en el derecho romano y en la filosofía de la segunda escolástica española, tuvo especial trascendencia en Europa en el primer tercio del siglo XVII y algunos años después.
La venta de cargos de Indias en tiempos de Olivares: el conde de Castrillo
Authors: Gil Martínez Francisco
Published: June 2017

En la década de 1630, Olivares puso en marcha una campaña de ventas de oficios de proporciones desconocidas hasta entonces. El presidente del Consejo de Indias, el conde de Castrillo, fue el encargado de negociar personalmente la gran mayoría de las operaciones relativas a América. Analizamos el entramado administrativo mediante el cual se tramitaron las ventas y sus implicaciones políticas.
Los toros en Santiago de Chile durante el periodo colonial
Authors: González Estévez Escardiel , Sanfuentes Echeverría Olaya
Published: June 2017

A pesar de su inexistencia hoy en Chile, y de su olvido, los toros fueron, como en todo territorio dependiente del poder español, el centro del universo lúdico, con notorias implicaciones sociales. Aunque siguieron la trayectoria ibérica, evolucionando de lo ritual hacia el toreo espectáculo, existieron factores que particularizaron la tauromaquia en el contexto, como la prolongación del toreo caballeresco por su faceta de entrenamiento bélico con vistas a la frontera araucana.
El sistema turbidítico conglomerático de Andatza (Pirineos occidentales): Estratigrafía, sedimentología y control estructural
Authors: Bodego A. , Agirrezabala L. M.
Published: June 2017

En este trabajo se describe la estratigrafía y sedimentología de la Formación Conglomerados de Andatza. Mediante el análisis de facies se han interpretado tres asociaciones de facies principales correspondientes a un sistema turbidítico (de grano grueso) y al talud: un sistema turbidítico interno (o cañón), un talud fangoso de alto gradiente y otro de bajo gradiente. La distribución cartográfica de las asociaciones de facies junto con el análisis de paleocorrientes describen un modelo sedimentario de sistema turbidítico de grano grueso en forma de “L” para los Conglomerados de Andatza, cuya morfología fue controlada por fallas normales sinsedimentarias de basamento. El carácter grosero del tamaño de grano de este sistema turbidítico indica la proximidad del área fuente de los conglomerados, que alimentaría el cañón turbidítico desde el norte a través de una estrecha plataforma marina.
Dinámica de la estructura de comunidades del Cenozoico tardío de Norteamérica: Episodios de Recambio Rápido de Fauna (RTE) dentro del concepto de Cronofauna
Authors: Hernández Jasso R. E.
Published: June 2017

A lo largo del Cenozoico tardío la riqueza genérica máxima tendió hacia la perdida de diversidad, aunque se reconocieron tres picos con tasas muy altas de primeros registros seguidos de una alta tasa de extinciones que se expresan como episodio de recambio rápido de faunas (RTE) (Henfiliano temprano, Blancano tardío e Irvingtoniano tardío). Sin embargo, la secuencia de estos sucesos forma un patrón que se ajusta al concepto de cronofauna de Olson (1952). Los episodios de RTE se considerarían en esta estructura como los eventos de transición entre cronofaunas. Mientras que los periodo de relativo equilibro equivaldrían a la propia cronofauna, en la cual los nuevos ecomorfos van adquiriendo un papel dominante, persistiendo alrededor de una serie de intervalos, no así su composición taxonómica, la cual es alterada por pequeños reajustes de fauna de baja intensidad.
Bajo este patrón podemos deducir que en los últimos 9 millones de años se reconocen 4 cronofaunas distintas: cronofauna del Clarendoniano (sección tardía), cronofauna del Blancano, cronofauna del Irvingtoniano y cronofauna del Holoceno (sección inicial).
Silicificaciones selectivas en Thalassinoides y otras estructuras biogénicas asociadas a calizas de plataforma marina y hardground (Albiense inferior, Sonabia, Cantabria)
Authors: Bustillo M. A. , Elorza J. , Díez-Canseco D.
Published: June 2017

El presente trabajo estudia los diferentes tipos de sílex que aparecen en la Formación Calizas de Oriñón (Aptiense superior-Albiense inferior), en un zona concreta de la costa oriental de Cantabria (Liendo-Castro Urdiales), debido a su gran abundancia y espectacularidad. Las rocas que los incluyen son principalmente biocalcarenitas (wackestones/packstones de pellets, fragmentos de equinodermos, ostreidos, foraminíferos y espículas calcáreas o silíceas calcificadas), siendo el ambiente de depósito marino de plataforma abierta, y existiendo un hardground regional, donde las silicificaciones son diferentes. La fuente de la sílice proviene de la calcitización o disolución de las espículas de esponjas silíceas.
Se determina que la gran mayoría de sílex (mosaicos de cuarzo micro-microcriptalino y calcedonita principalmente), se forman por la silicificación selectiva de estructuras biogénicas, siendo las galerías de Thalassinoidespreferentemente silicificadas, debido a que en su relleno existe mayor proporción de materia orgánica y mayor porosidad y permeabilidad. En las calizas que soportan el hardground además de las silicificaciones selectivas sobre fósiles (rostros de belemnites, ostreidos y equínidos), la sílice se acumula de forma importante en huellas de alimentación y rellenos de perforaciones, dando lugar a su vez a costras sobre bioturbaciones y perforaciones que a pesar de su importancia no han podido ser clasificadas.
La silicificación de todas las estructuras biogénicas, originó inicialmente fases opalinas y tuvo lugar durante la diagénesis temprana cuando la oxidación de la materia orgánica estaba todavía activa, conservándose en los Thalassinoides silicificados formas (filamentos y cocoides) que podrían ser consideradas microbianas. La transformación ópalo-cuarzo fue temprana, preservándose dichas formas.
En las galerías silicificadas de Thalassinoides los procesos diagenéticos son diferentes a los de los sedimentos carbonáticos marinos que las incluyen, y al resto de estructuras biogénicas silicificadas, existiendo en estas galerías neoformación de dolomita y calcita, en un microambiente cerrado donde las condiciones cambian de oxidantes a reductoras.
Adsorption of Pb(II) from Solution by Mangosteen Peel Charcoal Powder
Authors: Sawekwiharee Sangwoei , Pechprasarn Suejit , Kuttiyawong Anchana , Albutt Naphat
Published: June 2017

This research investigates the use of charcoal produced from waste peels of the mangosteen (Garcinia mangostana L.) fruit as adsorbents of lead contaminants for cost effective wastewater treatment. Test solutions of lead (Pb (NO3)2) were prepared over 0.003 M to 0.5 M, to observe a color change KI was added to the solution. Charcoal from mangosteen peel was added in powder form or as flakes. We found that at least 1.5 g of charcoal was required to adsorb lead from 20 ml of a 0.015 M (Pb (NO3)2) solution, as indicated by low sediment and reduced color change.
Hydroxyapatite Synthesized from Waste Eggshell via Ball Milling
Authors: Nuamsrinuan Nisakorn , Kaewwiset Weeranuch , Limsuwan Pichet , Naemchanthara Kittisakchai
Published: June 2017

Hydroxyapatite was synthesized using calcium originated from waste eggshell that was reacted with phosphate obtained from diammonium hydrogen orthophosphate by ball milling technique. The samples were mixed at different time from 5 to 150 min. The structure, function group and morphology of hydroxyapatite were characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR) and field emission scanning electron microscopy (FE-SEM). The result showed that the hydroxyapatite phase was appeared after ball milling about 5 min and confirmed with FTIR results. The FE-SEM of hydroxyapatite powder was spherical shape and agglomerate. The crystallinity of hydroxyapatite was increased with increasing ball milling time. This experiment showed that the nano hydroxyapatite could synthesized from waste eggshell by ball milling technique.
Phytoremediation of Soil Contaminated with Used Lubricant Oil Using Spathiphyllum spp.
Authors: Boonyaroj Varinthorn , Kaewsrijan Nipawan , Sangkhamnaruepon Nanthanit
Published: June 2017

Soil contamination with used lubricating oil from automobiles is a growing concern in many countries, especially in Asian. This research was conducted on a laboratory scale. The plant used in this research was Spathiphyllum spp. in comparison with controlled (no-plant). The size of reactor used in this research was set at 20 cm width, 20 cm length, and 40 cm height with working volume of the reactor was 0.016 cm3. Moreover, a pH value was controlled in a range of 7 to 8. The soil contaminated with used lubricant oil collected from automobile shop in Nonthaburi province. Soil contaminated and treated soil were extracted by solid-phase extraction (SPE) and analyzed by gas chromatography with mass spectrometer (GC–MS). The results showed that Spathiphyllum spp. could be growth during time operation. Spathiphyllum spp. has a potential in reclaiming hydrocarbon-contaminated soil such as Benzene, Toluene, Ethylbenzene, and Xylene (BTEX) approximately 20 to 60 days operation.
Effects of Silver Nanoparticles on Heterotrophic Bacterial Community Inhabiting the Anoxic Paddy Soil of Flooded Rice Microcosms
Authors: Nicomrat Duongruitai , Chamutpong Siriphatrc
Published: June 2017

Although silver nanoparticles (AgNPs) have been applied more in our daily life. They are well known for their antimicrobial activities against a wide range of organisms but more concerns on the negative effects of AgNP products contaminated to the environment especially on most microorganism niches related to nutrient cycling in ecosystem. In the study, research was done to in understand the effects of AgNPs on heterotrophic bacterial populations in rice paddy soil. Both culturable N2-fixing bacteria and common heterotrophic bacteria could adapt themselves to AgNPs at low concentration (less than 50 ppm). However, more distinct reduction in N2-fixing bacteria against AgNPs were detected than heterotrophic bacterial niches at least 100 ppm AgNPs . These evidences indicated AgNPs at high concentration had significant adverse effects on the diverse microbial consortiums as well as rice seedlings.
The Development of Predictability Measurement Method for Winter Monsoon Forecasts in Thailand
Authors: Saiuparad Sunisa
Published: June 2017

The forecasting method is important because it can predict phenomena in the future. The accuracy of the forecast depends on the model and the initial conditions. In addition, the predictability measurement method is important can be check the accurate of forecasts. In this research is winter monsoon forecasts in Thailand by the shallow water model. The data from The Bjerknes Centre for Climate Research (BCCR), University of Bergen, Norway. The global climate model is Bergen Climate Model (BCM) Version 2.0 (BCCR-BCM2.0) of the Intergovernmental Panel on Climate Change (IPCC) is used. The Lyapunov exponent (LE) is the predictability measurement method for verify the efficiency of model and establish the new predictability measurement method by the time series analysis. The result to show that the new predictability measurement method by the time series analysis can be measure the efficiency of the winter monsoon forecasts in Thailand by the shallow water model for December 2015 to December 2056 are suitable.
The Influence of Aluminium Dross on Phase Compositions and Microstructure of Cement Composites
Authors: Lamasai Kantamard , Jaitanong Nittaya , Narksitipan Suparut
Published: June 2017

The influence of aluminium dross on the phase compositions and microstructure of cement composites were studied in this research. The cement/aluminium dross composites were prepared by adding ground granulated blast-furnace slag (GGBS) from aluminium casting industrial. The sample was added fiber optic and mixed with aluminium dross at 0.1-0.8 wt% of cement. Then, the mixture was poured into a metallic mold (5mm*5mm*5mm). After incubation with saturated lime water for 3 days, the samples were wrapped with plastic films for 7 and 28 days. The chemical compositions of raw materials were characterized by using x-ray fluorescence spectrometry (XRF). The phase compositions and crystalline structure cement/aluminium dross composites were studied by using x-ray diffraction (XRD) technique. Scanning electron microscopy (SEM) was used for characterization of microstructure of these composites.
Determination of Radiation Attenuation Coefficients of Rubber Containing Barite
Authors: Jaiyen Sarawut , Phumsuwan Apinya , Thongpool Voranuch , Phunpueok Akapong
Published: June 2017

Radiation shielding properties of rubber containing barite (BaSO4) at different concentration were evaluated by using beam transmission method for 59.5 keV energy of 241Am radioactive sources. The linear attenuation coefficients of these materials have been measured using gamma spectrometer which contains NaI(Tl) detector. It was found that the linear attenuation coefficient increase with the increase of barite content up to a value of 25% (in weight). The linear attenuation coefficients were 0.050, 0.086, 0.110, 0.129 and 0.138 mm-1 and the HVL were 13.9, 8.1, 6.3, 5.4 and 5.0 mm for the barite concentration of 5%, 10%, 15%, 20% and 25% by weight, respectively. The X-ray shielding ability was confirmed by using radiographic technique.
The Development of Electrospinning Apparatus to Fabricate Nanofiber for Future Material Applications
Authors: Klumdoung Pattarinee , Pankaew Piyapong
Published: June 2017

This research examines the development of a low cost mobile electrospinning system for fabricating nanofiber. The electrospinning system developed in this study consists of a horizontal needle arrangement and a motor which supports the working system that controls the solution flow rate without an external syringe pump. In order to discover the equipment operating conditions for nanofiber fabrication, the distance from the needle to the target was studied. A PVA solution of 8wt% was used and voltage was applied at 13 kV. The needle to target distances were varied from 8-18 cm. At a distance of 10 cm, the SEM images showed that the smallest diameter of the fiber was 119 nm. The average diameter was in the range of 119-240 nm. Concentrations of the 3 different solutions of PVA, PEO and PCL with the variation of voltage at each concentration were studied. The results show the diameter of PVA at 8 wt% and 12%wt are in the range of 127-197 nm and 222-402 nm, respectively. The diameter of PCL solution at a 20 wt% concentration is in the range of 32-60 nm. PEO at 2 wt% and 4wt% was not able to form as a fiber.
Electrical Impedance Properties of Y2NiMnO6 Ceramics for DC Bias at Atmosphere
Authors: Albutt Naphat , Pechprasarn Suejit , Wanasuk Rukchanok , Sareein Thanapong
Published: June 2017

The electrical impedance of Y2NiMnO6 ceramics sintered at 1400 °C for 6 to 24 hours were investigated. The electrical properties of Y2NiMnO6 ceramics were examined in dc bias from 0 volt to 1.5 volt at room temperature. At frequencies below 105 Hz the high electric impedance decreased significantly with longer sintering time, indicating that the grain and grain boundary effects. Increasing dc bias also reduced impedance at the lower frequencies, with polarisation affect at higher frequencies. This behaviour suggests a decrease in the relaxation time of the mobile charge carriers with increasing dc bias and describes a thermally activated relaxation phenomena in the Y2NiMnO6 ceramics.
Diffuse Phase Transition and Dielectric Properties of Lead-Free Zr-Doped BCTS Ceramics
Authors: Kantha Puripat , Pengpat Kamonpan , Pisitpipathsin Nuttapon
Published: June 2017

Lead-free Ba0.9Ca0.1Sn0.06Ti0.94-xZrxO3 (BCTSZ) ceramics where x = 0.00, 0.03, 0.05, 0.07 and 0.09 were prepared by the conventional solid-state reaction method. The dielectric constant of the Zr doped BCTS ceramic was enhanced by Zr incorporation. The maximum dielectric constant were obtained at the composition of x = 0.05. The dielectric property investigation indicated that the degree of the diffuse phase transition behavior increased with Zr substitution. Phase transition of tetragonal to cubic structure was significantly dependent on the amount of Zr added.
Studies of Dielectric Permittivity of Y2NiMnO6 Ceramics for DC Bias at Various Temperatures
Authors: Albutt Naphat , Pechprasarn Suejit , Chobdee Phimonkhae , Sareein Thanapong
Published: June 2017

The dielectric permittivity (ε) of Y2NiMnO6 ceramics prepared by sintering at 1400 °C over 6 to 24 hours was investigated. The response of the ceramics was measured from 1 kHz to 3 MHz, with the influence of a fixed dc bias from 0 to 1.5 V and temperature from 40 °C to -60 oC. Increasing dc bias was found to reduce ε' at low frequencies, while at higher frequencies the dc bias had less influence on ε'. At 40 °C a sharp transition from high to low ε' occurred starting at ~100 kHz, as the temperature of the ceramic was lowered, the transition shifted to lower frequencies. This behaviour is attributed to the charge ordering of Ni2+ and Mn4+ ions and the thermal effect on the ions energy.
Influence of Feedstock Feed Rate on the Properties of SPPS-Deposited Cobalt Ferrite Splats
Authors: Sanpo Noppakun , Tharajak Jirasak
Published: June 2017

Cobalt ferrite sol-gel solution was deposited onto mild steel substrates to form single splats using a solution precursor plasma spray (SPPS) process. It was revealed that the thermal oxidation of cobalt and iron salts occurred mainly into six different formations of deposited splats. These formulations were cobalt monoxide (CoO), maghemite (γ-Fe2O3), cobalt oxide (Co3O4), cobalt oxyhydroxide (CoOOH), goethite (α-FeOOH), hematite (α-Fe2O3), magnetite (Fe3O4), and cobalt ferrite (CoFe2O4). The surface topographies of the splats exhibited burned, unmolten, partially molten, and completely molten splats. The feed rates of SPPS process played the important role on several properties of the splat such as splat morphologies and percentage of the obtained composite splat phases.
Carbon Thin Film on Silicon by Microwave Plasma
Authors: Leena Chonticha , Pakpum Chupong
Published: June 2017

This work aims to develop a low pressure microwave plasma deposition system to coat carbon thin film on silicon substrate. The system use a commercial microwave oven as a microwave source to get plasma discharge. The vacuum pressure was achieved by two stage rotary vane vacuum pump which is capable to reach ultimate pressure at 2×10-1 Pa under borosilicate chamber glass. The carbon thin films was successfully deposited on silicon substrate by pure acetylene plasma with gas flow rate 30 ml/min at total operating pressure of -70 cmHg reading by analog dial vacuum gauge, using microwave power at 1,200 Watts and deposit time at 150 seconds. Raman analysis showed peak at around 1336.20 cm-1 (D-peak) and 1611.87 cm-1 (G-peak), by utilizing ID and IG can be determined that there are 43.22% of sp3 contained in deposited film. Energy Dispersive X-Ray analysis indicated that the deposited thin film compose of carbon atoms 82.00 at% and silicon atoms 18.00 at%. The morphology and the thickness of the film was investigated by scanning electron microscope and atomic force microscope, respectively.
Electrical Sheet Resistance and Wetting Properties of TiO2 Nanoparticle Thin Films Prepared by Sparking Process
Authors: Toboonsung Buppachat
Published: June 2017

An electrical sheet resistance and water contact angle of titanium dioxide nanoparticle thin films were prepared by sparking process. The experiments were carried out by the titanium wires as electrodes of sparking process and varied the sparking time of 1-4 h and the annealing temperature of 200-400 OC for 2 h. The as-deposited and as-annealed of thin films on glass substrate were measured a water contact angle and a sheet resistance whereas a surface was analyzed by a scanning electron microscopy. The results found that the optimum as-deposited TiO2 NP thin films was shown the homogeneity surface, the minimum sheet resistance and the duplicate water contact at the sparking time of 3 h. The optimum as-deposited TiO2 NP thin films was annealed which the water contact angle and the sheet resistance of the as-annealed TiO2 NP thin films decreased with increasing the annealing temperature. However, the hydrophilic property was shown optimum at the annealing temperature of 400 OC.
Effect of Deposition Time on Structure of TiAlN Thin Films Deposited by Reactive DC Magnetron Co-Sputtering
Authors: Witit-Anun Nirun , Buranawong Adisorn
Published: June 2017

Titanium aluminum nitride (TiAlN) thin films were deposited by reactive DC magnetron co-sputtering technique on Si substrate. The effect of deposition time on the structure of the TiAlN films was investigated. The crystal structure, surface morphology, thickness and elemental composition were characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM) and energy dispersive X-ray spectroscopy (EDS) technique, respectively. The results showed that, all the as-deposited films were formed as a (Ti,Al)N solid solution. The as-deposited thin films exhibited a nanostructure with a crystallite size of less than 30 nm. The film thickness increase from 115 nm to 329 nm, while the lattice parameter decrease from 4.206 Å to 4.196 Å, with increasing of the deposition time. Cross section analysis by FE-SEM showed compact columnar and dense morphology as a result of increasing the deposition time. The elemental composition of the as-deposited films varied with the deposition time.
Photovoltaic Properties of a Conjugated Copolymer Blending with Flame-Made ZnO Nanoparticles
Authors: Kruefu Viruntachar , Khantha Chanitpa , Wootthikanokkhan Jatuphorn , Phanichphant Sukon
Published: June 2017

The synthesis, characterizations, and photovoltaic studies of copolymer based on 4,4-dodecylpentaleno[1,2-b]dithiophene (PC12PDT) and 5-octyl-5H-thieno[3,4-c]pyrrole-4,6-dione (TPD) were described. The PC12PDTTPD copolymer achieved a high open circuit voltage (Voc) of ~ 0.8-0.9 V. Bulk-heterojunction (BHJ) solar cells were fabricated by using chlorobenzene with 1% chloronapthalene as the solvent additive. The ZnO nanoparticles, produced by flame spray pyrolysis (FSP), were dispersed in 1-butanol. After that, it was loaded into the devices along with [6,6]-phenyl-C61-butyric acid methyl ester (PC61BM) used as the electron acceptor. From the results, it was found that the ZnO nanoparticles with different amount had the effect on the power conversion efficiency (PCE) of the solar cells. The PCE obtained in this study (3.33%) was found in the 5.45 wt% ZnO loaded device. This was an improvement as compared to that of the standard device (2.45%).
Predicting the UV Spectrum of Oligodeoxynucleotide by 2D-Matlab
Authors: Albutt Naphat , Pechprasarn Suejit
Published: June 2017

A 2D-Matlab model was developed to predict the UV absorbance spectra and thus concentration of oligodeoxynucleotide samples. This model will be valuable for researchers designing experiments involving oligodeoxynucleotides. Initial data was acquired from UV absorbance spectra of oligodeoxynucleotides 23, 24 and 34 bases long. The model, which would predict the concentration of DNA from the R260 value, is shown to predict absorbance spectra and the extinction coefficient of DNA as shown when compared across a range of concentrations.
Characterizations of Conductors in Quartic Number Fields with Ramified Prime
Authors: Prabpayak Chanwit
Published: June 2017

Let OK be the ring of Integers of a Field K. By an order O in K we mean a subring of OK containing a Q-basis for the field K. The largest ideal of OK contained in O is called the conductor of O. In this paper we investigate conductor ideals whose norm is a power of some ramified prime in quartic number fields.
A Study of Brand Green Image in Relation to Eco-Branding of Fashion Products
Authors: Kan Chi Wai , Chow Cheby Yuen Ting , Sarikanon Chamlong , Mongkholrattanasit Rattanaphol
Published: June 2017

Eco-friendliness is the vital role of brand reputation in business perspective. Moreover, there is an increasing emphasis on branding and publicity to build brand image with consumer trust. It included strengthening sustainability in company, certifying claims made and presenting this to consumers by eco-branding and publicity. In this study, we examined the relationship between eco-branding and brand green image of fashion products and it was noted that they have linear relationship. This linear relationship between eco-branding and brand green image can not only demonstrate the importance of eco-branding strategy but also prove the consumers’ perception of sustainable consuming.
Applications of Tricyclazole and Biosoil on Microbial Inhibition
Authors: Boonthod Rattanaporn , Bunsri Thidarat
Published: June 2017

Biosoil is acknowledged as a synthesis biofertiliser, which is governed by alkaline stabilising the wasted sludge from the biological wastewater treatment processes. The biosoil is prepared in accordance with the US EPA guideline of biosolids Class A, conducting the non-detectable levels of pathogens in biosoil. This study aims to evaluate the possibility of tricyclazole and biosoil in microbial control. The microbial species are selected from topsoil in paddy field. The numbers of living microbes are sorted by selective media, bacteria and fungi are growth on specific medias of nutrient agar and potato dextrose agar, respectively. Using sterilisation techniques, the numbers of bacteria and fungi are counted and primarily identified via microscopic. The solutions at concentration 0.1-0.5 mg/L of tricyclazole and 0.01-10 mg/L of biosoil are free from bacteria and fungi. The natural soil sample has presented bacteria and fungi of 71,000 and 22,000 cfu/mg, respectively. By applying biosoil concentration of 10 mg/L, becteria and fungi are reducd to 500 and 1,000 cfu/mg, respectively. Adding 0.4 mg/L of tricyclazole, can eliminate becteria and fungi. The mixture of fungicide, 10 mg/L of biosoil solution combined with 0.4 mg/L or above of tricyclazole solution can kill both bacteria and fungi. Biosoil can reduce the usage of chemical fungicide as it can store and release tricyclazole within a longer time. The inhibition process by tricyclazole can be prolonged upto 23 hours before degrading.
Antimicrobial Property of Hydroxyapatite Derivative Nanoparticles
Authors: Sanpo Noppakun , Tharajak Jirasak
Published: June 2017

Recently, the antimicrobial activity of ceramic nanoparticles has been highlighted and much attention is now directed toward using them as a new substitute over conventional organic agents, which tend to contain noxious materials harmful to humans. The use of these ceramics has the advantage of containing mineral elements that are essential to the human body as well as a strong antibacterial activity, even when present in small concentrations. In this work, the antimicrobial ceramics based on hydroxyapatite (HA) were successfully prepared in a wet chemical process with additions of several types of transition metal salts. Eventually, we presented methods for the synthesis of modified HA and their antimicrobial efficiency against S. aureus. The incorporation of transition ions into HA backbone structure can be used as effective bioactive delivery systems for the slow release of antibiotics.
The Study of Turbulent Nutrient Solution Flows in Difference Hydroponics System Arrangements
Authors: Pramuanjaroenkij Anchasa , Dabut Nantana , Sutti Sompong , Sanboon Anon
Published: June 2017

This work studied the turbulent flow of the nutrient solution which affected the growth of plants in four hydroponic systems; the horizontal (traditional), the vertical cup-grown, the ladder and the droplet systems, which were connected with individual solution pumps which submerged in only one nutrient solution tank to supply the turbulent nutrient solution flow to all systems. Two experiments were done by planting Red Oak lettuce, fluid and ambient temperatures, fluid pH and sunlight intensity were measured 2 times a day from 4 systems placed in the same area and environment during 20 days of the experimental periods. From both result sets, the lower ambient and solution temperatures in the 2nd experiment yielded more productivity. The results also showed that adjusting pipe and hose sizes did not cause the nutrient solution overflow out of the systems, the turbulent flow occurred and the horizontal system could produce the highest productivity. However, the higher pump power was required to produce the turbulent solution, the higher pump power higher heat transfer from the pump to the nutrient solution in the tank since all pumps were placed in the same solution tank, this heated solution caused the lower productivity in this work.
Defluoridation of Groundwater Using Raw Material of Autoclaved Aerated Concrete
Authors: Chansuvarn Woravith
Published: June 2017

A batch process of defluoridation using raw material of autoclaved aerated concrete (AAC) was studied under optimum conditions. The parameters of adsorption method, such as pH, adsorbent dose and contact time were optimized under batch experiments. SPADNS method was used to quantitatively evaluate the residual fluoride concentration. Under optimum conditions, pH of solution, adsorbent dose and contact time was to be 7, 0.1 g/10 mL and 60 min, respectively. The amount of defluoridation was found to be 3.23 mgF-/gACC. Deflouridation capacity of AAC can be explained on the basis of the chemical interaction of fluoride with the metal oxides under suitable pH conditions. The adsorption process was found to follow first order rate mechanism as well as Freundlich isotherm.
Analysis of Possible Application of Temperature Dependences of Processed Materials’ Physical and Mechanical Properties to Define the Maximum Workability Temperature
Authors: Vasilega D.S. , Zyryanov V.A.
Published: June 2017

The results of experimental studies of the different machinability group materials’ characteristics, including tool steel DIN C125W, heat-resistant steel (C - 0.1%, Si - 0.6%, Cu - 0.3%, W - 0.1%, Mn - 0.4%, Ni - 23%, P - 0.01%, Cr - 12%, S - 0.01%, V - 0.01, Mo - 1.5%, Ti - 3%, V - 0.001%, Al - 0.6), nickel-based superalloy (Fe - 4%, C - 0.1%, Si - 0.6%, Mn - 0.5%, S - 0.01%, P - 0.01%, Cr - 15%, Ce - 0.01%, Mo - 4%, W - 6%, V - 0.3%, Ti - 2%, Al - 2%, B - 0.01%), the changes in the minimum surface wear, maximum cutting path, and cutting temperature in the processing of these materials, as well as the experimental data analysis showed that the extreme values of changes in the materials’ physical and mechanical properties under the temperature impact can be defined as the minimum surface wear temperature and maximum cutting path temperature, that is, the conditions corresponding to the maximum workability of the materials. It is possible to use the materials physical and mechanical property dependence on temperature for defining the maximum material workability temperature when processing it by cutting. The article suggests a method to define the maximum material workability temperature.
Investigation on Wear Behavior of Bamboo Filler Reinforcement of Injection Moulded Plastic Gear
Authors: Mehat Nik Mizamzul , Kamaruddin Shahrul
Published: June 2017

An increase in demand for industrial gears has instigated the escalating uses of plastic-matrix composite, particularly carbon or glass fibre reinforced plastics as gear materials to enhance the mechanical strength and thermal resistance of plastic gear. Nevertheless, the production of large quantity of these synthetic fibres reinforced composites has posed serious threat to ecosystem. This study is conducted to study the applicability and practical ability of using bamboo fillers particularly in plastic gear manufacturing as opposed to synthetic fibres. The Taguchi method is used to investigate the effects of gear test rig parameters and bambo filler reinforcement on wear behaviour of injection moulded plastic gear. The results revealed that the use of natural fillers such as bamboo in the plastic gear industry is practical and economically viable.
Examination of the Welding Processes when Welding of Steel in Protective Gas Atmosphere of Gases with the Application of Modeling and Numerical Simulation
Authors: Kraváriková Helena
Published: June 2017

Modelling and numerical simulation of technological welding processes is the creative experimental method. Simulation replaces a real system computer model. To create the model can be applied to many experiments under predetermined conditions and analysis of the results. The results can be optimized and implemented to a real system. In a relatively short time, it is possible to solve complex processes occurring in the melting phase of the welding process, using the most advanced computer technology. Appropriately selected algorithm of model experiments can help study the course of temperature fields and formation of stresses and strains in solving the problems in the field of welding. The result of thermal and structural tasks of numerical simulation using FEM are the temperature fields, stress fields and strain generated in the process of welding and welded parts during cooling. Procedure of solving the tasks can be applied to any weld shape and any material of welded parts. The results published in the paper were obtained by solving the thermal and stress- strain tasks in the ANSYS program. Modelling and numerical simulation open possibilities for the three dimensional analysis of the phenomena studied. Based on the development of numerical methods and their application, it is possible to create computational models. Their implementation in software systems opens new possibilities for the area of numerical simulation of technological welding processes. The paper described simulation fillet and butt weld made of stainless steel 17242.
Effect of the Thickness of Al2O3-TiO2 Composite Oxide Films on the Electrical Properties of Anode Al Foils
Authors: Xiang Lian , Park Sang Shik
Published: June 2017

High-voltage-etched Al foils with TiO2 coating were fabricated via vacuum infiltration. Specimens subjected to different number of coating cycles (n = 0, 1, 2, 4, and 8) were annealed at 550 °C, and subsequently anodized at different voltages (100, 300, and 500 V). The microstructures of the specimens were observed by field emission scanning electron microscopy and field emission transmission electron microscopy. The results showed that uniform TiO2 films (30 nm per coating cycle) were successfully formed on the high-voltage-etched Al foils. Its tunnels showed a dual-layer structure comprising an Al2O3 outer layer and an Al–Ti composite oxide inner layer after anodizing at 500 V. All the TiO2-coated specimens anodized at different voltages could withstand the corresponding voltage. The thicker is the Al–Ti composite oxide layer, the higher is the specific capacitance of the anode Al foils. Compared to the specimens without the TiO2 coating, the increasing ratios of the specific capacitances of the specimens coated 4 times reached the maximum values, which were 60.2%, 34.0%, and 30.2%, when anodized at 100 V, 300 V, and 500 V, respectively. These results suggest that the Al–Ti composite oxide layer is not only effective in enhancing the specific capacitance but also has a significant effect on the properties of the anode Al foils.