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Chulalongkorn University

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2020

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The Usage Of Coal−Layered Double Oxide For Removal Of Toxic Dye Fromaqueous Solution, Pornnapa Tongchoo, Sonchai Intachai, Prakaidao Pankam, Chomponoot Suppaso, Nithima Khaorapapong Dec 2020

The Usage Of Coal−Layered Double Oxide For Removal Of Toxic Dye Fromaqueous Solution, Pornnapa Tongchoo, Sonchai Intachai, Prakaidao Pankam, Chomponoot Suppaso, Nithima Khaorapapong

Journal of Metals, Materials and Minerals

CoAl−layered double oxide derived from calcination of CoAl−layered double hydroxide at400Cfor 120 min, delivered the change in microstructure with increasing surface area. Spinel Co3O4was the majority in the product as confirmed by X-ray diffraction, and Fourier transform infrared andUV-visible spectroscopies. The calcined product, CoAl−layered double oxide resulted in significantadsorption capacity on dye removal superior to that of CoAl−layered double hydroxide. The adsorbed amounts of the diverse dyes increased as follows: methylene blue phenolphthaleinmethyl orange orange II. The adsorption affinity between adsorbent and dyes relied on electrostatic interaction and physical adsorption.

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Impact Of Boron Carbide And Graphite Dual Particulates Addition On Wear Behavior Of A356 Alloy Metal Matrix Composites, Pankaj R. Jadhav, Madeva Nagaral, Shivakumar Rachoti, Jayasheel I. Harti Dec 2020

Impact Of Boron Carbide And Graphite Dual Particulates Addition On Wear Behavior Of A356 Alloy Metal Matrix Composites, Pankaj R. Jadhav, Madeva Nagaral, Shivakumar Rachoti, Jayasheel I. Harti

Journal of Metals, Materials and Minerals

The current work gives the detailed microstructural analysis and wear behaviour of aluminiumalloy A356 based metal matrix composite. Here, boron carbide (B4C) and graphite (Gr) particulates were used as reinforcing phase to develop A356/ 4 wt% B4C, A356/ 4 wt% Gr composites along with A356/ 4 wt% Gr/ 12 wt% B4C hybrid composites. The composites were developed by conventional stir casting method to improve the wear properties. The developed composites were subjected to scanning electron microscope (SEM) formicrostructural analysis and then to DUCOM made wear test assembly to know the dry sliding wear behaviour. The wear tests were conducted for …

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Dyeing Properties And Color Fastness Of Eri Silk Yarn Dyed With Soaked Red Kidneybean Water, Piyaporn Kampeerapappun, Kritsana Wongwandee, Siriluk Janon Dec 2020

Dyeing Properties And Color Fastness Of Eri Silk Yarn Dyed With Soaked Red Kidneybean Water, Piyaporn Kampeerapappun, Kritsana Wongwandee, Siriluk Janon

Journal of Metals, Materials and Minerals

The purpose of this research was to study the dyeing of eri silk yarn using soaked red bean water. The optimal condition for preparing dye solutions was a ratio of 1:5 of dried red bean to water and dyeing at 100°C for 45 min. The dyeing process was conducted with and without mordants, using three different mordanting methods; pre-mordanting, meta-mordanting, and post-mordanting. The effects on silk analyzed are color fastness to washing, wet and dry rubbing, acid and alkali perspiration, and color characteristics on CIEL*a*b* color coordinates.Without mordants, the dyed silk yarn gave a rosy brown color. Each mordant caused …

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Laser Powder Bed Fusion Of Ti6al4v Lattice Structures And Their Applications, Thywill Cephas Dzogbewu Dec 2020

Laser Powder Bed Fusion Of Ti6al4v Lattice Structures And Their Applications, Thywill Cephas Dzogbewu

Journal of Metals, Materials and Minerals

The study focused on producing lattice structures using rhombic and diagonal nodes and indicatingtheir logical biomedical and engineering applications. Laser powder bed fusion manufacturingtechnology a subset of additive manufacturing was used to manufacture the lattice structures with different struts geometry. Average elastic modulus value of 5.30.2 GPa was obtained for therhombic lattice structures and 5.10.1 GPa for the diagonal lattice structures. Generally, the mechanicalproperties of the lattice structures produced could be logically considered suitable for biomedical and engineering applications. The mechanical properties of the lattice structures could be fine-tunedfor a specific engineering or biomedical applications by varying the lattice properties …

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Magnetic Sensors And Geometrical Magnetoresistance: Areview, Abdelfattah Mohammed Mansour Dec 2020

Magnetic Sensors And Geometrical Magnetoresistance: Areview, Abdelfattah Mohammed Mansour

Journal of Metals, Materials and Minerals

Magnetic sensing devices are of the extremely significant kind of detectors, that are used several important and useful applications. Geometrical extraordinary magnetoresistance (EMR) is thegeometrical kind of magnetoresistance associated with the non-magnetic semiconductor-metalhybrid structure and influenced by geometrical shape. As a result of Lorentz force, the current path change from metal (in absence of magnetic field) to semiconductor (under the subjection of themagnetic field) in semiconductor-metal hybrid structure is the key of EMR phenomena, i.e. once the metal is placed in a semiconductor, it works as a short circuit with the majority of applied current moving through metallic inhomogeneity and …

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Quenched And Tempered High Strength Steel:A Review, Gadadhar Sahoo, Krishna Kumar Singh, Vinod Kumar Dec 2020

Quenched And Tempered High Strength Steel:A Review, Gadadhar Sahoo, Krishna Kumar Singh, Vinod Kumar

Journal of Metals, Materials and Minerals

Quenched and tempered steel are broadly classified as low alloy conventional grades with C contentof 0.15-0.40% and tool steels with C content as high as 2% alloyed with strong carbide forming elementssuch as Cr, V, Mo etc. in the range of 1-12%. In both the cases, steels are used in hardened/quenchedand tempered or auto tempered condition for improved toughness, strength and wear resistance. The C content and tempering temperature are optimized based on desired application. However, achieving high strength/hardness along with adequate toughness is a challenge. The chemistry designis one of the important parts of developing these grades. The judicious …

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Screen Printed Textile Electrodes Using Graphene And Carbon Nanotubes With Silver For Flexible Supercapacitor Applications, Norawich Keawploy, Radhakrishnan Venkatkarthick, Panyawat Wangyao, Jiaqian Qin Dec 2020

Screen Printed Textile Electrodes Using Graphene And Carbon Nanotubes With Silver For Flexible Supercapacitor Applications, Norawich Keawploy, Radhakrishnan Venkatkarthick, Panyawat Wangyao, Jiaqian Qin

Journal of Metals, Materials and Minerals

The eco-friendly conductive cotton textile is promising alternatives for the flexible substrates in wearable devices since the cotton is as an inexpensive natural fabric material and compatible in modern portable electronics with adequate electrical conductivity. In this work, flexible conductive cotton-based electrodes areprepared via a screen-printing method using the carbonaceous nanomaterialssuch as carbon nanotubes (CNTs) and graphene with an additional component of conductive silver (Ag) powder and textile ink. The prepared conductive cotton electrodes exhibit lower sheet resistance (<10Ω) along with superior mass loading (20-30mgcm-2). On the basis of the performance of cottonelectrodes prepared, an all-solid-state flexible supercapacitor device was successfully fabricated whichexhibits a high specific areal capacitance of 677.12 mFcm-2at 0.0125 mAcm-2 for a suitable electrodecomposition (60% of Ag and 40% CNTs) using a PVA-KOH gel electrolyte. The flexible device endures a stable electrochemical performance under severe mechanical deformation using differentbending angles (0, 30, 45, 60and 90) of the device and possesses excellent cyclic stability with the capacitance retention of ~80% even after 3000 CV cycles.

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Soldering Of Copper Using Graphene-Phosphoric Acid Gel, Gurudatt Puranik, Asis Sarkar, Nirankar Mishra, Sangam Chandrasekhar Gurumurthy, Shridhar Mundinamani Dec 2020

Soldering Of Copper Using Graphene-Phosphoric Acid Gel, Gurudatt Puranik, Asis Sarkar, Nirankar Mishra, Sangam Chandrasekhar Gurumurthy, Shridhar Mundinamani

Journal of Metals, Materials and Minerals

Soldering is a physical process in which one metal melts and joins the other to form a strong bond,which further helps in electron conduction and increases the mechanical strength in any electronic circuits. The present work demonstrates the development of graphene-based flux comprising of 2 g of graphene and 2 ml of phosphoric acid for the residue-free, high stability, durable, and two-stepsoldering of copper wire on to the surface of the copper-based printed circuit board. The soldering fluxcan be applied to the copper, and wire can be soldered in ambient conditions using commercial solderingiron at a standard soldering temperature of …

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Preparation And Properties Of Fired Clay Bricks With Added Wood Ash, Anuwat Srisuwan, Supachai Sompech, Chiawchan Saengthong, Sukhontip Thaomola, Prinya Chindraprasirt, Nonthaphong Phonphuak Dec 2020

Preparation And Properties Of Fired Clay Bricks With Added Wood Ash, Anuwat Srisuwan, Supachai Sompech, Chiawchan Saengthong, Sukhontip Thaomola, Prinya Chindraprasirt, Nonthaphong Phonphuak

Journal of Metals, Materials and Minerals

This study was designed to determine the effects of wood ash on the physical and mechanical properties of fired clay bricks. The clay bricks were fabricated with the addition of 0, 4, 8, 12, and 16% by weight of wood ash. Strength development of brick was cased byfired at 900, 1000, and 1100°C for 40 min. The experimental results demonstrated that the physical property and strength of the fired clay bricks depend on the wood ash contentand firing temperature. Higher wood ash content affected an increase in porosity and water absorption, while the bulk density of the clay brickswas reduced. …

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Ultraviolet‐Shielding And Water Resistance Properties Of Graphene Quantum Dots/Polyvinyl Alcohol Composite-Based Film, Sutthipoj Wongrerkdee, Pichitchai Pimpang Dec 2020

Ultraviolet‐Shielding And Water Resistance Properties Of Graphene Quantum Dots/Polyvinyl Alcohol Composite-Based Film, Sutthipoj Wongrerkdee, Pichitchai Pimpang

Journal of Metals, Materials and Minerals

The Ultraviolet‐shielding (UV‐shielding) and water resistance properties of graphene quantum dots/polyvinyl alcohol (GQDs/PVA) composite-based film have been investigated. The GQDs/PVA composite-based films were fabricated with different GQDs concentrations of 0, 5, 10, 15, and 20 wt%. The optical property of GQDs was carried out by utilizing fluorescence spectroscopy. Characterizationsof GQDs/PVA composite-based films were performed byusing FT-IR spectroscopy, and UV-vis spectroscopy. It was found that GQDs exhibited the strongest excitation wavelength in the UV range. GQDs/PVA composite-based films offered an improved UV-shielding capacity when compared to PVA films and glass. Particularly, the GQDs/PVA composite-based film containing 20 wt% GQDs exhibited a …

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Mechanical Characterization And Wear Behavior Of Aerospace Alloy Aa2124 And Micro B4c Reinforced Metal Composites, Fazil N, V Venkataraman, Madeva Nagaral Dec 2020

Mechanical Characterization And Wear Behavior Of Aerospace Alloy Aa2124 And Micro B4c Reinforced Metal Composites, Fazil N, V Venkataraman, Madeva Nagaral

Journal of Metals, Materials and Minerals

In the present investigation, the mechanical and wear properties of aerospace alloy AA2124-9wt%of B4C composites were displayed. The composites containing 9wt% of micro boron carbidein AA2124 alloy were synthesized by liquid metallurgy method through stir casting. For the composites, reinforcement particles were preheated to a temperature of 400°Cand afterward added in ventures of two stages into the vortex of liquid AA2124 alloy compound to improve the wettability anddispersion. Microstructural examination was carried out by SEM and elemental investigation was finished by EDS. Mechanical and wear properties of as cast AA2124 alloy and AA214-9wt% of B4C composites were evaluated as per …

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Influence Of Coconut Shell Powder Organic Reinforcement On Chemical, Microstructuraland Mechanical Properties Of Spark Plasma Sintered Ti-Ni Based Metal Matrix Composite, Peter Odetola, Abimbola Patricia Popoola, Emmanuel Ajenifuja, Olawale Popoola Dec 2020

Influence Of Coconut Shell Powder Organic Reinforcement On Chemical, Microstructuraland Mechanical Properties Of Spark Plasma Sintered Ti-Ni Based Metal Matrix Composite, Peter Odetola, Abimbola Patricia Popoola, Emmanuel Ajenifuja, Olawale Popoola

Journal of Metals, Materials and Minerals

Metal matrix composites (MMCs) are currently used in place of pure alloys and polymer matrix composites because of their unique physical properties. Titanium and nickel powders were alloyed with coconut shell powder (CSP) as organic compound reinforcement to form a TiNi-based metal matrix composite (MMC) using spark plasma sintering (SPS) technique. The powders were mild-milledfor 16 h and then axially consolidated at 850C, heating rate of 100Cmin-1and 50 MPa sintering pressure. Characterizations were done using field emission scanning electron microscope (FE-SEM-EDX) and x-ray diffractometer (XRD). Elemental and structural characterizations of the composites revealed the formation of the Ti-rich eutectic phase, …

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Characterization Of Tio2-Activated Carbon Onto Adsorption And Photocatalytic Propertiesand Its Application, Mark Chobchun, Pasakorn Jutakridsada, Puttiporn Thiamsinsangwon, Pornnapa Kasemsiri, Khanita Kamwilaisak, Prinya Chindaprasirt Dec 2020

Characterization Of Tio2-Activated Carbon Onto Adsorption And Photocatalytic Propertiesand Its Application, Mark Chobchun, Pasakorn Jutakridsada, Puttiporn Thiamsinsangwon, Pornnapa Kasemsiri, Khanita Kamwilaisak, Prinya Chindaprasirt

Journal of Metals, Materials and Minerals

This study investigates the characterization of TiO2in conjunction with activated carbon(AC) on its adsorption and photocatalytic properties. TiO2in theabsence and presence of AC were preparedby the sol-gel method. TiCl4was used as a precursor to reduce using acidic solution during preparationprocess. The effects of the amount of AC on the characteristics of composites were investigated. TGA technique was used to evaluate the amount of TiO2and AC in TiO2/AC composite. The adsorptionproperties of TiO2/AC were characterized using XRD, TEM, N2adsorption/desorption, FTIR and UV - Visdiffuse reflectance spectroscopy techniques. The photocatalytic activitiesof the composites were investigated by measuring the removal of acid dye. …

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Effect Of Variations In The Composition And Size Of Red Sand Grains On The Quality Of K-225 Concrete, Mukti Hamjah Harahap, Aulia E. Putri Dec 2020

Effect Of Variations In The Composition And Size Of Red Sand Grains On The Quality Of K-225 Concrete, Mukti Hamjah Harahap, Aulia E. Putri

Journal of Metals, Materials and Minerals

The effect of variations in the composition and size of red sand grains on the solid quality made in the form of a 15×15×15 cm cubes were investigated. By implementing the standard of SNI K-225 which is a mixture of 1:1.9:2.8 with FAS 0.6 and the composition of red sand consisting of 0, 2, 4, 5,and 6.5% of the weight of fine aggregate and variations in the size of red sand grains of 80, 100, and 120 mesh, the concrete was being treated in a water bath for 28 days. It was tested by the method of water absorption, compressive …

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Effect Of Amorphous Rice Husk Silica Additionon The Structure Of Asphalt Composite, Simon Sembiring, Agus Riyanto, Rudy Situmeang, Zipora Sembiring, Nita Susanti, Iqbal Firdaus Dec 2020

Effect Of Amorphous Rice Husk Silica Additionon The Structure Of Asphalt Composite, Simon Sembiring, Agus Riyanto, Rudy Situmeang, Zipora Sembiring, Nita Susanti, Iqbal Firdaus

Journal of Metals, Materials and Minerals

In this study, modified asphalt composites were produced by adding silica extracted from rice husk.The mass ratios of asphalt to silica are 1:0, 1:1.6, 1:1.8, and 1:2 and calcined at the temperature of 150C for 6 h.The structural and microstructural characteristics of asphalt composites were examinedby x-ray diffraction (XRD),Scanning Electron Microscopy/Energy Dispersive x-ray (SEM-EDX) Spectroscopy and Differential Thermal Analysis (DTA-TGA),respectively. The XRDstudy revealed that the major phases were carbon and amorphous silica. The surface morphology of asphalt without silica addition presents a cluster of larger size than the cluster of asphalt with an addition of silica. The addition of silica …

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Butterfly Pea Flower Extract As An Alternative Dye In Cytological Canine Mast Cell Tumor Staining, Araya Suebkhampet, Pongsiwa Sotthibandhu, Titaree Laoharatchatathanin Dec 2020

Butterfly Pea Flower Extract As An Alternative Dye In Cytological Canine Mast Cell Tumor Staining, Araya Suebkhampet, Pongsiwa Sotthibandhu, Titaree Laoharatchatathanin

The Thai Journal of Veterinary Medicine

Mast cell tumors (MCTs) are the most common skin tumors in dogs. Laboratory diagnosis of MCTs has been established by many techniques.The dyes generally used for tissue staining, including MCTs, are synthetic dyes, however, the global interest in using eco-friendly natural dye has become a significant matter. We focused on the butterfly pea (Clitoria ternatea L.) which is locally available. Limited studies are known about their efficacy as a tissue stain. The aim of this study was to investigate the staining ability of butterfly pea flower extract in cytological canine MCTs. The dried petals were ground into powder and dissolved …

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Rabbit As A Reservoir Of Multidrug-Resistant Acinetobacter Baumanniiexpressing The Ade Multidrug Efflux Pumps, Sirawit Pagdepanichkit, Rungtip Chuanchuen Dec 2020

Rabbit As A Reservoir Of Multidrug-Resistant Acinetobacter Baumanniiexpressing The Ade Multidrug Efflux Pumps, Sirawit Pagdepanichkit, Rungtip Chuanchuen

The Thai Journal of Veterinary Medicine

Acinetobacter baumanniihas emerged as a nosocomial pathogen and considered as a major cause of hospital acquired infections. While A. baumanniiin humans have been extensively studied in various situations, the study of A. baumanniiin companion animals is still limited. The aim of this study was to examine the presence and antimicrobial resistance profile of A. baumanniiisolates from companion rabbits. A total of 17 nasal swab from rabbit carcasses were obtained. A. baumanniiwas detected in 23.53% (4/17) of the samples and all the isolates exhibited resistance to chloramphenicol, erythromycin, spectinomycin and trimethoprim. Fifty percent of the isolates (2/4) were multidrug resistance (MDR) …

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Influence Of Electromagnetic Stimulation On Blood Macro And Micro Elements In Dairy Cows, Ljiljana Andjusic, Zoran Milankov, Dusan Maric, Bozidar Milosevic, Radojica Djokovic, Marko Cincovic, Nebojsa Lalic, Zvonko Spasic Dec 2020

Influence Of Electromagnetic Stimulation On Blood Macro And Micro Elements In Dairy Cows, Ljiljana Andjusic, Zoran Milankov, Dusan Maric, Bozidar Milosevic, Radojica Djokovic, Marko Cincovic, Nebojsa Lalic, Zvonko Spasic

The Thai Journal of Veterinary Medicine

The aim of this study is to determine the influence of EM stimulations on macro and micro element concentrations in the blood, to determine if changes in ion concentrations depends on their basal values and to determine the usefulness of this kind of stimulation in the maintenance of the blood macro and micro element levels in cows. 17 cows were included in the experimental group (affected by a unique EM stimulation protocol of three weeks duration) and 9 cows were included in the control group. Significantly higher (P<0.01) concentrations of Ca, P, Na and Cu and lower (P<0.05) concentrations of Zn were found in the experimental group after EM stimulation. Dynamic changes of macro and micro element concentrations were inversely proportional to their basalvalue before the beginning of the experiment which means that animals with lower basal concentrations had greater changes of value during stimulation. Dynamicchanges of Ca, P, Mg, Fe, K and Cu were more notable in the experimental group that was exposed to EM stimulation compared to the control group. However, dynamic changes of Na and Zn concentrations were identical in the experimental and control groups. Exposure of cows to EM stimulation had a positive effect at Ca and P concentrations and improved calcaemia and phosphatemia in all the exposed animals.

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Comparison Between Conventional And Applied Vertebral Heart Score (Vhs) Methods To Evaluate Heart Size In Healthy Thai Domestic Shorthair Cats, Jetsada Rungpupradit, Somchin Sutthigran Dec 2020

Comparison Between Conventional And Applied Vertebral Heart Score (Vhs) Methods To Evaluate Heart Size In Healthy Thai Domestic Shorthair Cats, Jetsada Rungpupradit, Somchin Sutthigran

The Thai Journal of Veterinary Medicine

Thoracic radiography is the most common first modality for heart size evaluation and confirming cardiogenic pulmonary edema in cats with suspected heart diseases. The Vertebral Heart Score (VHS) was established as an objective methodfor diagnosing cardiomegaly via thoracic radiography. However, the conventional VHS method is inappropriate for cats with abnormal thoracic vertebrae.Therefore, the applied VHSmethod, which uses the lateral view axis sum divided with the length of each thoracic vertebra (T4, T5 and T6) was created to minimize the limitation of VHS in these cases. This study compared the conventional and the applied VHS methods in healthy Thai domestic shorthair …

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Development And Validation Of A Diagnostic System For The Detection Of Specific Antibodies And Antigens Against Porcine Epidemic Diarrhea Virus, Bo Dong, Chuanjiang Yang, Haiyan Zhang, Kesong Jiang, Xiaoyan Yang Dec 2020

Development And Validation Of A Diagnostic System For The Detection Of Specific Antibodies And Antigens Against Porcine Epidemic Diarrhea Virus, Bo Dong, Chuanjiang Yang, Haiyan Zhang, Kesong Jiang, Xiaoyan Yang

The Thai Journal of Veterinary Medicine

Porcine epidemic diarrhea virus (PEDV) is highly pathogenic and infects suckling piglets, thereby imposing a major burden on the swine industry all over the world. The aim of this study is to develop two ELISA systemsfor the detection of antigens and antibodies againstPEDV in pigs.The PEDV N recombinant protein was expressed and was used as the coating antigen to establish an indirect ELISA for detecting PEDV-specific antibodies in pig serum. Moreover, MAb was induced with the recombinant N protein and used for sandwich ELISA to specifically test for PEDV. The specificities of the two ELISAs were validatedby comparing the results …

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Gel Protein Supplementation Enhanced Serum Igf-1 Concentration In Pre-Weaning Piglets, Morakot Nuntapaitoon, Junpen Suwimonteerabutr, Nutthee Am-In Dec 2020

Gel Protein Supplementation Enhanced Serum Igf-1 Concentration In Pre-Weaning Piglets, Morakot Nuntapaitoon, Junpen Suwimonteerabutr, Nutthee Am-In

The Thai Journal of Veterinary Medicine

The piglet pre-weaning mortality is a major problem in swine production. The objective of the present study was to determine the effect of dietary gel protein supplementation on pre-weaning mortality and growth in piglets. A total of 48 Landrace x Yorkshire crossbred sows were included in this study. On farrowing day, the sows were randomly allocated into two experimental groupsby parity: Control (n=20)and Treatment (n=28).The piglets in the Control group sows (n=234) were not orallysupplemented and the piglets in the Treatment group sows (n=316) were orallysupplemented with gel protein (Porcistart®, Virbac. Co., Ltd., Loudeac, France). The piglets in the treatment …

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The Status Of Antimicrobial Resistance In Campylobacterspp. Isolated From Animals And Humans In Southeast Asia: A Review, Saeid Jafari, Mahdi Ebrahimi, Taradon Luangtongkum Dec 2020

The Status Of Antimicrobial Resistance In Campylobacterspp. Isolated From Animals And Humans In Southeast Asia: A Review, Saeid Jafari, Mahdi Ebrahimi, Taradon Luangtongkum

The Thai Journal of Veterinary Medicine

Campylobacteris considered to be a major foodborne pathogen associated with human bacterial gastroenteritis in many parts of the world. Southeast Asia (SEA) has been challenging for infectious diseases and antimicrobial resistance in recent years. Antibiotic resistance in Campylobacterisolates has been reported in humans and animals in this region.Since the SEA region is one of the top tourist destinations of the world, the provision of safe food is of importance for the travel-related foodborne infections. Therefore, it is essential to elucidate the status of antibiotic resistance of Campylobacterspp. in the SEA region to reduce the impact of infection and to implement …

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Effects Of Astragalus Polysaccharides On The Quality Of Frozen-Thawed Tibetan Boar Spermatozoa And Levels Of Genomic Dna Methylation In The Sperm, Yan-Ling Zhao, Shan-Zheng Li, Zi-Li Ren Dec 2020

Effects Of Astragalus Polysaccharides On The Quality Of Frozen-Thawed Tibetan Boar Spermatozoa And Levels Of Genomic Dna Methylation In The Sperm, Yan-Ling Zhao, Shan-Zheng Li, Zi-Li Ren

The Thai Journal of Veterinary Medicine

Astragalus polysaccharides (APS) have strong antioxidant effects and may thus be useful for the preservation of semen at low temperaturesin vitro. However, the effects of APS on the quality of frozen-thawed Tibetan boar sperm have yet to be clarified. Here, the effects of APS on the quality and levels of genomic DNA methylation in Tibetan boar spermatozoawere assessed. Tibetan boar semen was cryopreserved in high-density tubules in freezing extender supplemented with 0, 0.2, 0.4, 0.6, or 0.8 g·L-1 APS to determine the optimal concentration of APS. Spermgenomic DNAmethylation levels of the three groups (Fresh grouprepresents freshspermatozoa, No add grouprepresents unsupplemented …

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Airborne Bacteria And Affordable Air Purifiers In Small-Animal Hospital, Thailand, Chalalai Rueanghiran, Srisamai Viriyarampa Dec 2020

Airborne Bacteria And Affordable Air Purifiers In Small-Animal Hospital, Thailand, Chalalai Rueanghiran, Srisamai Viriyarampa

The Thai Journal of Veterinary Medicine

Exposure to bioaerosol in hospitals is associated with health effects but in the field of veterinary hospitals there are limited articles on bioaerosol concentration especially in Southeast Asia. This investigation of aerosol bacteria (cross-sectional study) was conducted in two veterinary teaching hospitals located in Thailand. Airborne bacteria were collected from air samples infour room types (reception hall, intensive care unit, out-patient department and in-patient hospital department) in each hospital using a sieve impactorair sampler at different periods (8:00–10:00, 10:00–12.00 and 13:00–15:00). The results revealed high bacterial contamination in all collected air samples. The average levels of total viable bacteria count …

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Trends In The Clinical Use Of Antibiotics In A Veterinary Hospital In Nigeria, 2013 –2017, Thelma Ebele Ihedioha, Isaac Uzoma Asuzu, John Anaelom Nwanta Dec 2020

Trends In The Clinical Use Of Antibiotics In A Veterinary Hospital In Nigeria, 2013 –2017, Thelma Ebele Ihedioha, Isaac Uzoma Asuzu, John Anaelom Nwanta

The Thai Journal of Veterinary Medicine

This study was a retrospective survey that evaluated the trend of clinical use and misuse of antibiotics on animals presented for veterinary care at the Veterinary Teaching Hospital, Nsukka, Enugu State, Nigeria, from January 2013 to December 2017. A total of 4851 case files were evaluated and, overall, antibiotics were used in 2316 cases (47.74%). The most frequently used antibiotics were a penicillin-streptomycin combination (36.53%), oxytetracycline (32.08%), gentamicin (19.78%) and sulphadimidine (5.35%); the frequency of use of other antibiotics was each less than 5%. The overall use of antibiotics increased significantly (p<0.05) across the study period, from 35.25% in 2013 to 52.38% in2016. There was a significant (p<0.05) increase in the frequency of use of oxytetracycline (11.55% in 2013 to 40.31% in 2016) and sulphadimidine (0.8% in 2013 to 12.98% in 2017), but the frequency of penicillin-streptomycin use significantly (p<0.01) decreased from 74.5% in 2013 to 23.13% in 2017. The frequency of inappropriate use of antibiotics significantly (p<0.01) increased from 4.38% (2013) to 25.29% (2017), while that of non-compliance rose significantly (p<0.01) from 15.54% (2013) to 41.88% (2016).The frequency of use of antibiotics without definitive diagnosis/sensitivity testing was consistently high and did not significantly (p>0.05) vary across the study period (85.49% to …

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Co-Circulation Of Canine Chaphamaparvovirus And Canine Parvovirus 2 In Dogs With Diarrhea In Turkey, Ender Dinçer, Mehmet Özkan Timurkan, Pelin Fatoş Polat Dinçer, Hakan Aydın Dec 2020

Co-Circulation Of Canine Chaphamaparvovirus And Canine Parvovirus 2 In Dogs With Diarrhea In Turkey, Ender Dinçer, Mehmet Özkan Timurkan, Pelin Fatoş Polat Dinçer, Hakan Aydın

The Thai Journal of Veterinary Medicine

Chaphamaparvoviruses, a divergent group of parvoviruses(family Parvoviridae) infect both domestic and wild mammalian and avian species, including bats, chickens and pigs. They have recently been identified using metagenomic analysis from tissue and stool samples of healthy and sick animals. Here, dogs (60 healthy and 43 diarrheal) were investigated for the presence of canine chaphamaparvovirus, canine coronavirus (CCoV), canine adenovirus (CAV), canine distemper virus (CDV) and canine parvovirus 2 (CPV-2) by rectal swabs using polymerase chain reaction (PCR). For chaphamaparvovirus, all the healthy dogs tested negative whereas three of the diarrheal dogs tested positive (3 /103; 2.9%). CPV-2 was also detected …

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Seroprevalence And Risk Factors Of Q Fever In Small Ruminant Flocks In Selected States Of Peninsular Malaysia, Faez Firdaus Abdullah Jesse, Bura Thlama Paul, Hamza Abdirahman Hashi, Eric Lim Teik Chung, Nur Athirah Abdurrahim, Mohd Azmi Mohd Lila Dec 2020

Seroprevalence And Risk Factors Of Q Fever In Small Ruminant Flocks In Selected States Of Peninsular Malaysia, Faez Firdaus Abdullah Jesse, Bura Thlama Paul, Hamza Abdirahman Hashi, Eric Lim Teik Chung, Nur Athirah Abdurrahim, Mohd Azmi Mohd Lila

The Thai Journal of Veterinary Medicine

Q fever is caused by Coxiella burnetii, an obligate intracellular parasite which causes abortion and reproductive disorders in domestic animals and febrile illness in man. Earlier studies have detected C. burnetii,including serum antibodies in humans, cattle, sheep and goats in Malaysia. However, the overall seroprevalence status and contributing factors of Q fever among small ruminants in Malaysia are still unexplained. This study was therefore conducted to investigate the seroprevalence and risk factors of Q fever among small ruminant flocksin Negeri Sembilan and Terengganu states. To determine the seroprevalence of Q fever among small ruminants, we collected blood samples from a …

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Usefulness Of Cadaver Embalming Solutions As Alternatives To Formalin In Veterinary Surgical Training, Je-Sung Moon, Sung Min Nam, Sang-Soep Nahm, Hun-Young Yoon Dec 2020

Usefulness Of Cadaver Embalming Solutions As Alternatives To Formalin In Veterinary Surgical Training, Je-Sung Moon, Sung Min Nam, Sang-Soep Nahm, Hun-Young Yoon

The Thai Journal of Veterinary Medicine

Veterinary surgical training with live animals is inevitable for skill development. However, using a live animal is impractical owing to cost and ethical standards. Thus, well-embalmed life-like cadavers should be used. Thisstudy aimed to assess the usefulness of cadaver embalming in surgical training using two alternatives to formalin solution (FS)—Thiel’s solution (TS) and saturated salt solution (SS). Four groups, each comprising three Beagles, used FS, TS, and SS for cadaver embalming, and one group served as control. Skin elasticity, range of motion (ROM), tissue color, and life-like conditions during surgical procedures were evaluated at one-month intervals for a total of …

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A Study Of The Temporal Dynamics And Human Exposure To The Formosan Ferret-Badger (Melogale Moschata Subaurantiaca) Rabies, 2013 To 2019, Taiwan, Wen-Jane Tu, Mei-Chuan Wang, Guo-Chin Jau, Cheng-Ta Tsai, Chung-Ching Lin, Satoshi Inoue, Prawit Butudom, Cheng-Hung Lai, Chang-Young Fei Dec 2020

A Study Of The Temporal Dynamics And Human Exposure To The Formosan Ferret-Badger (Melogale Moschata Subaurantiaca) Rabies, 2013 To 2019, Taiwan, Wen-Jane Tu, Mei-Chuan Wang, Guo-Chin Jau, Cheng-Ta Tsai, Chung-Ching Lin, Satoshi Inoue, Prawit Butudom, Cheng-Hung Lai, Chang-Young Fei

The Thai Journal of Veterinary Medicine

The World Health Organization declared Taiwan rabies-free in 1961. On July 17, 2013, Taiwan confirmed the detection of rabies virus in wild Formosan ferret-badgers.This study investigated the epidemiology of Formosan ferret-badger rabies from July 2013 to December 2019 on Taiwan Main Island. There were two objectives of this study: 1) to study thetemporal dynamics of the epidemics during this period; 2) to assess the risk of human exposure to ferret-badger rabies. Results indicated that atotal of 805 rabies-confirmed ferret-badgers and 9 cases of spillover infection in non-reservoir hosts. The temporal dynamics showed only the epidemic in Eastern Taiwan exhibited the …

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Assessment Of Antibacterial And Immunostimulating Activity Of Black Cumin (Nigella Sativa) Extract Against Vibriosis In White Shrimp (Litopenaeus Vannamei), Indriyani Nur, Linianti, Waode Munaeni, La Ode Baytul Abidin, Maulidiyah Dec 2020

Assessment Of Antibacterial And Immunostimulating Activity Of Black Cumin (Nigella Sativa) Extract Against Vibriosis In White Shrimp (Litopenaeus Vannamei), Indriyani Nur, Linianti, Waode Munaeni, La Ode Baytul Abidin, Maulidiyah

The Thai Journal of Veterinary Medicine

It is assumed that the active components of Black cumin seed (Nigella sativa) contain beneficial effects on shrimp health as in humans. Therefore, this study aims to explore the antibacterial and immunostimulant potential of black cumin extract for disease control across V. harveyi. Treatments applied include the administration ofethanol extract mixed into shrimp feed at varying dosages (2500, 5000, 7500 ppm), hereinafter referred to as treatments A, B, C, respectively. All shrimps were exposed to pathogen V. harveyi at a density of 106 CFU ml-1after 14 days of testing duration excluding the negative control group. The immune responses of the …

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