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Reproductive Loss Due To Pestivirus Infection In Dairy Cattle Herds In Thailand, Jaruwan Kampa, Uthaiwan Sigh-Na, Kwankate Kanistanon, Suneerat Aiumlamai
Reproductive Loss Due To Pestivirus Infection In Dairy Cattle Herds In Thailand, Jaruwan Kampa, Uthaiwan Sigh-Na, Kwankate Kanistanon, Suneerat Aiumlamai
The Thai Journal of Veterinary Medicine
Infection with bovine pestivirus, Bovine Viral Diarrhoea Virus (BVDV), causes significant loss in cattleproduction worldwide. A new type of bovine pestivirus, atypical pestivirus, was identified in natural infected calffirstly in Khon Kaen, Thailand in 2004. The epidemiological studies have been done in the area, but loss inreproduction due to the infection has never been accessed. This study aims to investigate losses in herd’sreproduction and update epidemiological data in the population where atypical pestivirus was found. During 2008-2009, 420 dairy herds in the area were classified according to infective status into high-positive and non-infectiveherds by antibody analysis in bulk tank milk …
Acute And Chronic Toxicity Of Moringa Oleifera Linn Leaves Extracts, Songpol Chivapat, Pornchai Sincharoenpokai, Nalinphat Saktiyasuthorn, Aussavachai Shuaprom, Pratom Thongsrirak, Apirak Sakpetch, Anudep Rungsipipat
Acute And Chronic Toxicity Of Moringa Oleifera Linn Leaves Extracts, Songpol Chivapat, Pornchai Sincharoenpokai, Nalinphat Saktiyasuthorn, Aussavachai Shuaprom, Pratom Thongsrirak, Apirak Sakpetch, Anudep Rungsipipat
The Thai Journal of Veterinary Medicine
Moringa oleifera leaves have been reported to possess potential hypotensive and hypocholesterolemic andhypoglycemic activities; nevertheless toxicological data of this herb in animal models have still been scanty. Theobjective of this study was to evaluate both acute and chronic toxicity of the water extract of M. oleifera leaves by oraladministration. Acute toxicity test in mice by gavage with the extract twice, each at the dose of 10 g/kg, revealed thatthe extract produced no acute toxic symptoms and gross lesions of vital organs. Chronic toxicity study wasinvestigated in eighty Wistar rats allocated into four groups, each of ten per sex. Group 1 …
Immune Response Of Lion’S Paw Scallop Nodipecten Subnodosus (Sowerby, 1835) Challenged With Vibrio Alginolyticus, Erick Ramses Ramírez–Castillo, Marcial Arellano-Martínez, Bertha Patricia Ceballos-Vázquez, Héctor Abelardo González-Ocampo, Gabriel Aguirre-Guzmán, Antonio Luna-González
Immune Response Of Lion’S Paw Scallop Nodipecten Subnodosus (Sowerby, 1835) Challenged With Vibrio Alginolyticus, Erick Ramses Ramírez–Castillo, Marcial Arellano-Martínez, Bertha Patricia Ceballos-Vázquez, Héctor Abelardo González-Ocampo, Gabriel Aguirre-Guzmán, Antonio Luna-González
The Thai Journal of Veterinary Medicine
Immune response of Lion’s paw scallop Nodipecten subnodosus to the challenge of Vibrio alginolyticus strainAPSA2 was studied through the characterization of the activity of lysosomal enzymes and hemocyte size andnumber. Samples were obtained as hemocyte lysate supernatant (HLS) and plasma, after 6 and 24 hours, and 3, 6, and10 days after challenge. The enzymatic activity was tested by colorimetric and lysoplate assay techniques. Betweensampling times, significant differences in enzymatic activity determined by the colorimetric technique were found.The enzymatic activity was significantly higher in HLS than in plasma; in addition more enzymes were detected inHLS as compared with plasma. The enzymes …
A Study On The Association Between Number Of Impounded Days And Adoption Rate Of Stray Dogs At Public Animal Shelters In Changhua County, Taiwan, Meng-Chih Tung, Chang-Young Fei, Jeng-Tung Chiang, Kwong-Chung Tung
A Study On The Association Between Number Of Impounded Days And Adoption Rate Of Stray Dogs At Public Animal Shelters In Changhua County, Taiwan, Meng-Chih Tung, Chang-Young Fei, Jeng-Tung Chiang, Kwong-Chung Tung
The Thai Journal of Veterinary Medicine
According to the adoption records of the animal shelter in Changhua county from 2004 to 2010, this studyinvestigated if there was a statistically advantageous length of shelter stay, from the time when dogs impounded untiltheir adoption. The adoption records during this period of time showed that a total of 1,533 dogs were adopted. Thenumber of days for dogs to be impounded was divided into different categories and the adoption rate (number ofdogs in each category divided by the total number of dogs being adopted) was calculated. Statistical analyses wereperformed to investigate the association between the number of days of impoundment …
Ovarian Follicular Patterns And Hormone Profile In Thai Native Cattle (Bos Indicus), Denpong Sakhong, Thevin Vongpralub, Suporn Katawatin, Saksiri Sirisathien
Ovarian Follicular Patterns And Hormone Profile In Thai Native Cattle (Bos Indicus), Denpong Sakhong, Thevin Vongpralub, Suporn Katawatin, Saksiri Sirisathien
The Thai Journal of Veterinary Medicine
The objective of this study was to characterize the patterns of ovarian follicular waves, and FSH and P4concentration during estrous cycle in Thai native cattle (Bos indicus). Transrectal ultrasound examination of ovarieswas performed daily using a 7.5 MHz transducer and blood samples were collected after the ultrasound examinationduring May to August, 2010. There were 1-, 2- or 3-follicular waves per cycle in heifers, and 1-, 2-, 3- or 4-follicularwaves per cycle in cows. Moreover, in cows, only one cycle exhibited 4-follicular wave pattern. The majority of TNCcows (82.76%) exhibited a 3-follicular wave pattern, whereas the majority of heifers exhibited 2-(38.10%) …
Prevalence Of And Risk Factors Of Patellar Luxation In Dogs In Chiang Mai, Thailand, During The Years 2006–2011, Korakot Nganvongpanit, Terdsak Yano
Prevalence Of And Risk Factors Of Patellar Luxation In Dogs In Chiang Mai, Thailand, During The Years 2006–2011, Korakot Nganvongpanit, Terdsak Yano
The Thai Journal of Veterinary Medicine
The purpose of this study was to report on the incidence of patellar luxation in 128 dogs out of a total of 317dogs (40.3%) treated at orthopedic clinics in Chiang Mai, Thailand, from October 2006 through May 2011. Patellarluxation was most frequently found in small breeds, among which Poodles were the most commonly affected (34.3%).Most luxations were medial (89%), and 57.8% of affected dogs were female. Uniluxation of the patella was found in63%, and biluxation in 37%. Most dogs were classified as patellar luxation grade III. Cranial cruciate ligament rupturewas found only in medial patellar luxation grade IV. This study …
Heart Rate Change During Aquatic Exercise In Small, Medium And Large Healthy Dogs, Korakot Nganvongpanit, Siriphun Kongsawasdi, Bussaba Chuatrakoon, Terdsak Yano
Heart Rate Change During Aquatic Exercise In Small, Medium And Large Healthy Dogs, Korakot Nganvongpanit, Siriphun Kongsawasdi, Bussaba Chuatrakoon, Terdsak Yano
The Thai Journal of Veterinary Medicine
This study was divided into two experiments. For the first experiment, heart rates during exercise of 21healthy male dogs were recorded. The animals were brought to swim every 2 days, 8 times in all, for 10 minutes.Heart rates were measured every minute using a pulse watch. For the second experiment, 134 healthy adult dogswere categorized into three groups: small (41), medium (51) and large breed (42). Their heart rates were measuredevery minute for 34 minutes after the 5th swimming. In the first experiment, the heart rates during the 1st–4thswimming were significantly higher (p<0.05) than during the 5th 8th swimming. In the second experiment, the heartrates were significantly different (p<0.05) between small, medium and large dogs. No correlations were foundbetween weight, age, and heart rate. From the results of the second experiment, we were able to formulate anequation for predictable heart rate of each group of dogs (small, medium and large dogs). From the results, werecommend that the limits on the length of time spent for aquatic exercise should be 15–30 minutes, depending on thebreed (size) of dog. Moreover, there should be trainers observing each dog to prevent over-exercise.
Efficacy Of Acetone And Ethanol In Dehydrating Canine Body Sheets :Before And After Resin Coating, Kriengyot Sajjarengpong, Pawana Chuesiri, Pakorn Prachammuang, Panida Phisiriyuenyong
Efficacy Of Acetone And Ethanol In Dehydrating Canine Body Sheets :Before And After Resin Coating, Kriengyot Sajjarengpong, Pawana Chuesiri, Pakorn Prachammuang, Panida Phisiriyuenyong
The Thai Journal of Veterinary Medicine
The aim of this study was to compare the efficacy of ethanol and acetone in dehydration of canine bodysheets before preservation in resin for a 16-week period. A 10-kg male dog which died of the respiratory failure waspreserved in 10% formalin via common carotid artery at room temperature for 7 days prior to being kept in a freezerat -250C for 7 days. The body of the dog was cut into 2.5-cm-thick sheets with a band saw. The body sheets wereseparately dehydrated for 3 days with either acetone or ethanol. In this study, the color of muscles and fat fromacetone-dehydrated sheets …
The Use Of Commercial Soil Nucleic Acid Extraction Kit And Nested Pcr For Detection Of Leptospira In Farm Environment After Flooding In Taiwan, Ying-Bin Fuh, Wei-Yau Shia, Wei-Ming Lee, Ching-Lin Shyu, Chi-Young Wang, Chang-Young Fei
The Use Of Commercial Soil Nucleic Acid Extraction Kit And Nested Pcr For Detection Of Leptospira In Farm Environment After Flooding In Taiwan, Ying-Bin Fuh, Wei-Yau Shia, Wei-Ming Lee, Ching-Lin Shyu, Chi-Young Wang, Chang-Young Fei
The Thai Journal of Veterinary Medicine
Leptospirosis is a rapidly transmitted and flood-related disease. The number of cases usually increase in thecountries of Southeast Asia after flood damage during typhoon seasons. This disease also poses a potential threat toTaiwan due to its geographic characteristics. Therefore, it is necessary to establish a practical technique for anestimation of the distribution of Leptospira in natural environment, especially after flood damage. The aim of thisstudy was to demonstrate the use of commercial soil nucleic acid extraction kits with nested PCR in the detection ofLeptospira spp. in the farm environment. The detection limit for Leptospira DNA was 24.24 pg. A total …
Ejaculate Characteristics Of Captive Malayan Tapirs (Tapirus Indicus), Wanlaya Tipkantha, Budhan Pukazhenthi, Boripat Siriaroonrat, Ampika Thongphakdee, Umaporn Maikaew, Warisara Thomas, Daraka Tongthainan, Jessada Thaeonoen, Sumate Kamolnorranath, Mitchell Bush, Sitthawee Thongtipsiridech
Ejaculate Characteristics Of Captive Malayan Tapirs (Tapirus Indicus), Wanlaya Tipkantha, Budhan Pukazhenthi, Boripat Siriaroonrat, Ampika Thongphakdee, Umaporn Maikaew, Warisara Thomas, Daraka Tongthainan, Jessada Thaeonoen, Sumate Kamolnorranath, Mitchell Bush, Sitthawee Thongtipsiridech
The Thai Journal of Veterinary Medicine
The aims of this study were to optimize semen collection by electroejaculation and characterize ejaculatecharacteristics in Malayan tapir (Tapirus indicus). Eight adult males (4-20 years of age) were anesthetized using acombination of medetomidine HCl (0.012-0.018 mg/kg), butorphanol tartrate (0.012-0.018 mg/kg),and ketamine HCl(5-7 mg/kg) administered intramuscularly via a dart and subjected to electroejaculation. Ejaculates (milky-white toyellowish color) were successfully collected from all males. Averages (Mean±SD) of the seminal traits (volume, pH,osmolality, sperm concentration, total sperm motility, and viability) were 10.3±9.4 ml, 7.4±3.4, 278.6±13.3 mOsm,206.2±185.4x106 spermatozoa/ml , 24±15.4%, and 35.1±6.5%, respectively. Morphological analysis showed lowpercentage of normal spermatozoa 6.7±2.6 % with 39.2±8.5% …
Association Of Filaggrin (Flg) Gene Polymorphism With Canine Atopic Dermatitis In Small Breed Dogs, Gunnaporn Suriyaphol, Prapat Suriyaphol, Meena Sarikaputi, Sirin Theerawatanasirikul, Achariya Sailasuta
Association Of Filaggrin (Flg) Gene Polymorphism With Canine Atopic Dermatitis In Small Breed Dogs, Gunnaporn Suriyaphol, Prapat Suriyaphol, Meena Sarikaputi, Sirin Theerawatanasirikul, Achariya Sailasuta
The Thai Journal of Veterinary Medicine
As a cornified envelope protein, filaggrin (FLG) is involved in the formation and support of the skin barrier.FLG single nucleotide polymorphism (SNP) at the position 64,297,022 (rs22588227) on canine chromosome 17 hasinitially been described as being associated with canine atopic dermatitis (CAD) in Labrador Retrievers in UK. In thisstudy, we have examined whether the mentioned FLG SNP is associated with a susceptibility to CAD in small breeddogs, comprising 21 Poodles, 17 Shih tzus and 3 Pugs. Twelve of these subjects were dogs with atopy and wereassigned to the experiment group and the remaining 39 samples were healthy controls. The results …
Antimicrobial Sensitivity Of Avian Pathogenic Escherichia Coli (Apec) Isolated From Chickens During 2007-2010, Niwat Chansiripornchai, Sarawoot Mooljuntee, Pongthai Boonkhum
Antimicrobial Sensitivity Of Avian Pathogenic Escherichia Coli (Apec) Isolated From Chickens During 2007-2010, Niwat Chansiripornchai, Sarawoot Mooljuntee, Pongthai Boonkhum
The Thai Journal of Veterinary Medicine
Fifty isolates of Avian pathogenic Escherichia coli (APEC) isolated from chickens during 2007-2010 were invitro tested to 21 antimicrobial discs. The highest sensitivity of APEC was to fosfomycin (84%). The second sensitivityagainst enrofloxacin and norfloxacin was 70%. The antimicrobial sensitivity to colistin, gentamicin, kanamycin,sulfametroxazole+trimethoprim, amoxicillin+clavulanic acid and doxycycline were 66, 64, 62, 60, 58 and 52%,respectively. The antimicrobial resistance of APEC to tylosin, tilmicosin, tiamulin, lincomycin, amoxicillin, ampicillin,erythromycin, cephalexin and neomycin were 100, 100, 100, 94, 86, 82, 80, 72 and 62%, respectively.
Expression Of Aheabc Efflux System And Plasmid Profile Of Aeromonas Hydrophila Isolates From Farmed Nile Tilapia (Oreochromis Niloticus) Mintra, Mintra Lukkana, Janenut Wongtavatchai, Rungtip Chuanchuen
Expression Of Aheabc Efflux System And Plasmid Profile Of Aeromonas Hydrophila Isolates From Farmed Nile Tilapia (Oreochromis Niloticus) Mintra, Mintra Lukkana, Janenut Wongtavatchai, Rungtip Chuanchuen
The Thai Journal of Veterinary Medicine
Fifty Aeromonas hydrophila isolates from farmed Nile Tilapia were characterized for expression of AheABCmultidrug efflux system and plasmid profile. Thirty nine isolates (78%) expressed AheABC with production of 1.7 to221.3 folds more than AheB of A. hydrophila ATCC35654, the reference. This suggests that the AheABC efflux systemis not always constitutively expressed in the A. hydrophila clinical isolates. The isolates with less AheB expressionwere more resistant to antibiotics than those with high AheB expression. Seventeen isolates were found to carryplasmids that were arranged into 11 plasmid profiles. This is the first study of the AheABC efflux system in A.hydrophila isolates from …
Methanolic Activities Of Selected Weeds On Bacteria Isolated From Macrobrachium Rosenbergii Larvae, Najiah Musa, Nadirah Musa, Wan Nurhafizah Ibrahim, Mohd Zahrol Ariff Shariat, Arief Izzairy Zamani, Muhd Ranzi Abdullah, Tee Lea Wee, Mariam Marip, Laith Abdul Razak, Amar Sakhawi Awang Soh
Methanolic Activities Of Selected Weeds On Bacteria Isolated From Macrobrachium Rosenbergii Larvae, Najiah Musa, Nadirah Musa, Wan Nurhafizah Ibrahim, Mohd Zahrol Ariff Shariat, Arief Izzairy Zamani, Muhd Ranzi Abdullah, Tee Lea Wee, Mariam Marip, Laith Abdul Razak, Amar Sakhawi Awang Soh
The Thai Journal of Veterinary Medicine
The methanolic crude extracts of three weeds, Soapbush or Koster’s Curse (Clidemia hirta), Spanish Flag orWest Indian Lantana (Lantana camara), and Indian rhododendron (Melastoma malabathricum) were studied for theirantibacterial properties. The crude extracts were tested against ten bacterial isolates from giant freshwater prawnlarvae, Macrobrachium rosenbergii. Clidemia hirta extract showed the best MIC and MBC values against Vibrioalginolyticus which were 0.39 mg/ml and 6.25 mg/ml, respectively. Following that, three lowest concentration ofmethanolic crude extracts; 0.195 mg/ml, 0.39 mg/ml, and 0.78 mg/ml, were added to V. alginolyticus culture andobserved for morphological changes via Scanning Electron Microscope (SEM). The cell wall of V. …
Ecg Quiz, Chollada Buranakarl, Winai Chansaisakorn
Ecg Quiz, Chollada Buranakarl, Winai Chansaisakorn
The Thai Journal of Veterinary Medicine
No abstract provided.
Ophthalmology Snapshot, Nalinee Tuntivanich
Ophthalmology Snapshot, Nalinee Tuntivanich
The Thai Journal of Veterinary Medicine
No abstract provided.
Ultrasound Diagnosis, Phiwipha Kamonrat
Ultrasound Diagnosis, Phiwipha Kamonrat
The Thai Journal of Veterinary Medicine
No abstract provided.
Induction Of Cervical Relaxation For Artificial Insemination In Sheep, Sukanya Leethongdee
Induction Of Cervical Relaxation For Artificial Insemination In Sheep, Sukanya Leethongdee
The Thai Journal of Veterinary Medicine
In general, artificial insemination (AI) in sheep using frozen-thawed (FT) semen in commercial scale islimited due to the fact that the FT semen of sheep needs to be deposited into the uterus to achieve an acceptablefertility rate. Laparoscopic insemination with FT semen gives commercially acceptable fertility rates, however it is noteconomical and animal friendly. An alternative method is trans-cervical AI (TCAI). However, the unusual anatomy ofthe sheep cervix is a major limitation to this technique. In ewe, the cervical lumen has a convoluted and tortuousstructure that looks like a corkscrew consisting of internal cervical rings. The internal folds of the …
Body Surface Potentials Generated By The Heart Of Normal Guinea Pigs, Anusak Kijtawornrat, Suwanakiet Sawangkoon, Orlando P. Simonetti, Robert L. Hamlin
Body Surface Potentials Generated By The Heart Of Normal Guinea Pigs, Anusak Kijtawornrat, Suwanakiet Sawangkoon, Orlando P. Simonetti, Robert L. Hamlin
The Thai Journal of Veterinary Medicine
The objectives of this study were to describe (1) the form of body surface potentials for P, QRS and ST-Tcomponents using semiorthogonal ECG leads and vectorcardiograms (VCGs), (2) the instability of the QT usingcoefficient of variation compared with 3 other published methods, and (3) the frequency-domain characteristics of theQRS complex. Electrocardiograms were recorded and VCGs of P, QRS and ST-T loops were generated in frontal (Xaxisversus Y-axis), sagittal (Y-axis versus Z-axis), and horizontal (X-axis versus Z-axis) planes. Frequency-domaincomponents of the QRS complex were calculated using Fast Fourier Transform (FFT) algorithm. One of the 7 guineapigs was placed in sternal recumbency …
Effect Of Dietary Fiber, Ocimum Canum And Psyllium Seed, In High Cholesterol-Diet Fed Rats, Alisara Suriyasomboon, Annop Suriyasomboon, Surachai Chantip, Amorn Petchsom
Effect Of Dietary Fiber, Ocimum Canum And Psyllium Seed, In High Cholesterol-Diet Fed Rats, Alisara Suriyasomboon, Annop Suriyasomboon, Surachai Chantip, Amorn Petchsom
The Thai Journal of Veterinary Medicine
The aim of this study was to investigate the long term effect of dietary fiber, Ocimum canum and psylliumseed, on body weight and lipid level in blood of high cholesterol-diet fed rats. A total of 36 rats were divided into 3groups. There were 6-male and 6-female rats in each group. The control group (CTR) received the standard dietadded with 2.5% cholesterol of dry feed (HCD). The Occimum canum (Trt-OC) and the psyllium seed group (Trt-PS)received the HCD added with Occimum canum and psyllium seed at the amount of 10% of the dry feed, respectively.Daily feed intake was recorded. Body weight …
What Is Your Diagnosis, Pranee Tuntivanich, Suwicha Chuthatep
What Is Your Diagnosis, Pranee Tuntivanich, Suwicha Chuthatep
The Thai Journal of Veterinary Medicine
No abstract provided.
Recovery Of Zinc From The Spent Zinc-Carbon Dry Cell Batteries Through Pyrometallurgical Route, M Haque Khan, Asw Kurny
Recovery Of Zinc From The Spent Zinc-Carbon Dry Cell Batteries Through Pyrometallurgical Route, M Haque Khan, Asw Kurny
Journal of Metals, Materials and Minerals
Spent zinc-carbon batteries of all the five types (AAA, AA, C, D and 9V) were processed to recover zinc metal. All the components of the battery were separated, chemically analyzed and the anodic zinc parts were subjected to pyrometallurgical processing. Extraction of zinc was negligible when no fluxing agent was used. However, extent of recovery increased significantly when chloride salts: sodium chloride, calcium chloride and ammonium chloride were used as a fluxing agent. Among these, ammonium chloride gave the best result as flux. Using 10 %wt. of each flux, extraction of zinc was 90% for ammonium chloride, and around 75% …
4-(N,N-Diethylamino)Benzaldehyde Thiosemicarbazone As Corrosion Inhibitor For 6061 Al - 15 Vol. Pct. Sic(P) Composite And Its Base Alloy, G M. Pinto, J Nayak, A N. Shetty
4-(N,N-Diethylamino)Benzaldehyde Thiosemicarbazone As Corrosion Inhibitor For 6061 Al - 15 Vol. Pct. Sic(P) Composite And Its Base Alloy, G M. Pinto, J Nayak, A N. Shetty
Journal of Metals, Materials and Minerals
The inhibitive action of 4-(N,N-diethylamino)benzaldehyde thiosemicarbazone (DEABT) on the corrosion behavior of 6061 Al -15 vol. pct. SiC(p) composite and its base alloy was studied at different temperatures in sulfuric acid medium containing varying concentrations of it, using Tafel extrapolation and AC impedance spectroscopy (EIS) techniques. Results showed that DEABT was an effective inhibitor, showing inhibition efficiency of 80 % in 0.5 M sulfuric acid. The adsorption of DEABT on both the composite and the base alloy was found to be through physisorption obeying Langmuirs adsorption isotherm.The thermodynamic parameters such as free energy of adsorption and activation parameters were calculated.
Effect Of Vanadium On Subcritical Heat Treatment Behavior Of Hypoeutectic 16 Wt% Cr Cast Iron Containing 2 Wt% Mo, R Junsamoot, S Inthidech, K Sriprateep, P Sricharoenchai, Y Matsubara
Effect Of Vanadium On Subcritical Heat Treatment Behavior Of Hypoeutectic 16 Wt% Cr Cast Iron Containing 2 Wt% Mo, R Junsamoot, S Inthidech, K Sriprateep, P Sricharoenchai, Y Matsubara
Journal of Metals, Materials and Minerals
Subcritical heat treatment of austenite in alloyed cast iron by tempering at the temperature below pearlite transformation (A1), has been used to improve matrix hardness without hardening. Hypoeutectic high chromium cast irons containing 16 wt% Cr - 2 wt% Mo without and with V were prepared in order to clarify the effect of holding temperature and holding time on behavior of hardness and decomposition fraction of austenite in matrix (f) in subcritical heat treatment. As-cast specimens were held at temperature from 723 K to 923 K for 14.4 - 43.2 ks, and then cooled by fan air. In the as-cast …
Highly Porous Silica Network Prepared From Sodium Metasilicate, R E. Essien, O A. Olaniyi, L A. Adams, R O. Shaibu
Highly Porous Silica Network Prepared From Sodium Metasilicate, R E. Essien, O A. Olaniyi, L A. Adams, R O. Shaibu
Journal of Metals, Materials and Minerals
Porous silica network was prepared from sodium metasilicate (Na2SiO3) at room temperature (27C) using hydrochloric acid (HCl) as catalyst through the sol-gel method. The gel was dried at 120C for 1 day and calcined at 800C for 3 hours and the material obtained characterized using scanning electron microscopy (SEM), X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR). The results showed the formation of amorphous silica particles of average sizes 598 nm with ordered porous network of pore sizes ranging from 0.18-0.91 ?m. This synthetic route uses sodium metasilicate as commercial precursor without pore forming templates which could be useful …
Ni Electroless Plating Of Abs Polymer By Palladium And Tin-Free Process, P Dechasit, W Trakarnpruk
Ni Electroless Plating Of Abs Polymer By Palladium And Tin-Free Process, P Dechasit, W Trakarnpruk
Journal of Metals, Materials and Minerals
A palladium and tin-free process for the Ni electroless plating of acrylonitrile-butadiene-styrene (ABS) polymer has been developed. The ABS was first etched then activated with Ni (or Co) ions. Ni or Co adsorbed was quantified by atomic absorption spectroscopy. Sodium borohydride solution was found to be effective in reduction of Ni (or Co) ions. By immersing in a Ni plating bath the Co (or Ni) can then auto-catalytically deposit a Ni film on the ABS. The amount and thickness of Ni film determined by SEM-EDX were the highest when using 3 g/L of nickel acetate solution, 0.5 M sodium borohydride …
Preparation Of Copper Lead Frame By Powder Metallurgy Technique, P Y. Chew, A H. You, T R. Vijayaram, B K. See, P S. Lim, M C. Ng
Preparation Of Copper Lead Frame By Powder Metallurgy Technique, P Y. Chew, A H. You, T R. Vijayaram, B K. See, P S. Lim, M C. Ng
Journal of Metals, Materials and Minerals
Pure Cu is prepared with the dimension of 17.7 mm in diameter and 10 - 15 mm in height using powder metallurgical method to characterize its electrical and mechanical properties. These samples are compacted at a constant pressure of 280 MPa. Pure Cu pellets are sintered at 600C and 950C for 3, 4 and 7 hours. Before sintering, pure Cu pellet is subjected to SEM in order to check the compactness of the pellet, and also the grain structure of the Cu. All the pellets with different temperatures are re-weighed and sintered density are calculated after sintering. Besides that, porosity …
Mechanical Properties Of Stir-Mixed Sicp-Reinforced Aluminium Composites, R Buntan, D Phuenchomphu, P Sukmoung, K Doomao, O Anunapiwat, T Patcharawit
Mechanical Properties Of Stir-Mixed Sicp-Reinforced Aluminium Composites, R Buntan, D Phuenchomphu, P Sukmoung, K Doomao, O Anunapiwat, T Patcharawit
Journal of Metals, Materials and Minerals
Aluminium composites have found their strength in engineering applications such as automotive, electrical and light-weight applications. To achieve uniform microstructure and good mechanical properties, the fabrication techniques are prime factors in controlling wettability and porosity problems. This research therefore aimed for studying microstructure-mechanical property relation of SiCp-reinforced 356 aluminium composites fabricated by a cost-effective stir casting process, to which three elemental additions, Al-5Ti-B, Sr, and Mg,were investigated. Furthermore, effects of SiCp additions (0-15 wt.%) and T6 heat treatment (530C/12h + 155C/4 h) on mechanical properties of the composites were also studied. The 356 aluminium ingot was melted at 700C then …
Process Parameter-Microstructure-Mechanical Property Relations Of Sicp-Reinforced Aluminum Composites Produced By Powder-Injection Casting, M Bunma, P Subarporn, R Bobuangern, T Patthannkitdamrong, T Thuanwong, T Patcharawit
Process Parameter-Microstructure-Mechanical Property Relations Of Sicp-Reinforced Aluminum Composites Produced By Powder-Injection Casting, M Bunma, P Subarporn, R Bobuangern, T Patthannkitdamrong, T Thuanwong, T Patcharawit
Journal of Metals, Materials and Minerals
Aluminum composites are of interest for engineering applications such as electrical and especially automotive applications and their final physical and mechanical properties are usually determined by fabrication techniques. This research aimed to study effects of process parameters, which are i) argon gas flow rates at 5 and 10 l/min, and ii) casting temperatures at 620 and 680C, on integrity of the SiCp-reinforced 356 aluminum composites fabricated by powder-injection casting using a modified flux injection degassing machine. The SiCp additions are 0, 10 and 15 wt.%. Microstructure - mechanical property relations were constructed based on the predetermined process parameters. Aluminum 356 …
Synthesis Of Aligned Carbon Nanotubes By Floating Catalyst Method Using Ferrocene, R Ravindra, B R. Bhat
Synthesis Of Aligned Carbon Nanotubes By Floating Catalyst Method Using Ferrocene, R Ravindra, B R. Bhat
Journal of Metals, Materials and Minerals
The aligned carbon nanotubes (CNTs) have been synthesised by floating catalyst method using ferrocene as catalyst precursor and acetylene as carbon precursor. The reaction was carried out at 850C in double stage chemical vapor deposition (CVD) apparatus. The grown aligned CNTs were purified by air oxidation and acid treatment method. The aligned CNTs were characterised by using scanning electron microscopy, transmission electron microscopy and Raman spectroscopy. The purity of CNTs was determined by Thermal analysis and X-ray diffraction method. The average diameter of aligned CNTs were around 20nm. This process not only produces aligned CNTs but also avoids the preparation …