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Simple and rapid detection of pesticides and chemicals using surface enhanced Raman spectroscopy OAK
角田, 英男; 上元, 好仁; 堀川, 洋.
独自の銀ナノ粒子・基板を試作し,小型ラマン分光装置を用いジチオカーバメート系農薬(Thiram: tetramethylthiuram disulfide)・パルノックスおよびメラミンのラマンおよび表面増強ラマン(Surface Enhanced Raman Spectroscopy:SERS)スペクトルの計測を行った。濃度が4ppm から0.04ppmの範囲では,濃度とピーク強度との間に良い直線関係が示された。同様に小麦粉に混合したメラミンのラマンスペクトルおよびSERS スペクトルを顕微ラマン分光装置により計測した。1ppm濃度程度まで特有のSERS 吸収ピークが観測され,定性的検出が可能であった。この銀ナノ粒子・基板を用いた小型で安価な装置による表面増強ラマン(SERS)スペクトル計測は,農薬や化学物質の分析法として感度が高く実用性が十分あると考えられた。
Palavras-chave: 迅速簡便; ラマン分光; SERS; 農薬; メラミン; Simple and rapid Raman spectroscopy; SERS; Pesticides; Melamine.
Ano: 2009 URL: http://ir.obihiro.ac.jp/dspace/handle/10322/2651
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Melamine food recalls: Effects of melamine on animal/human health, food safety and economic trade AgEcon
Badrie, Neela; Jolly, Curtis M.; De Leon, Sonia Y..
Bridgetown, Barbados 6th – 10th July, 2009
Tipo: Presentation Palavras-chave: Melamine; Health Effects; Food Control; Food Recall; Economic; Tolerable Daily Limits; Health Economics and Policy; I18.
Ano: 2010 URL: http://purl.umn.edu/122662
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Effects of melamine or urea-formaldehyde or their mixture on performance in laying hens Thai Agricultural
Srisuda uda Sirilaophaisan; Jowaman Khajarern; Bundit Tengjarernkul.
Experiment was conducted to investigate the effects of melamine or urea-formaldehyde or their mixture on performance in laying hens (19-34 wk of age). Three hundred and twelve ISA Brown laying hens were allocated into thirteen dietary treatments, with four replications and with six hens each were fed with feeding trial for 112 d (4 x 28 d period). The diets were formulated to contain four graded levels (0.25, 0.50, 0.75 and 1.00%) of melamine or urea-formaldehyde (UF) or an equal mixture of both and also with no added for negative control. There were no significant effects on feed intake and survival rate (P>0.05) among each group. Egg production (EP), egg weight (EW), egg mass (EM) and number of egg were decreased (P<0.05), with the greatest...
Tipo: Collection Palavras-chave: Melamine; Urea-formaldehyde; Laying hen; Performance; ไก่ไข่; เมลามีน; ยูเรียฟอร์มาลดีไฮด์; สมรรถนะการผลิต; ผลผลิตไข่.
Ano: 2011 URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5178
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Effects of melamine and urea formaldehyde contamination in nile tilapia (Oreochromis niloticus) diets on growth performance, economic loss and toxicity appearance characteristic index Thai Agricultural
Aruneepong Srisathaporn; Jowaman Khajarern; Prapas Chalorkpunrut; Bundit Tengjroenkul.
A study was performed to evaluate the effects of melamine (Me) and urea formaldehyde (UF) combinations in diets on growth performance, and characterization of toxicity appearance. The combinations of three levels of Me and UF (0.5, 1.0 and 2.0%) were conducted with one control (no addition) in a completely randomized design (CRD). Four hundred and eighty mixed-sex fish with the initial weight of 9.67±0.03 g were assigned to 10 dietary treatments with 3 replications and fed for 6 weeks. No interaction was observed between Me and UF in this study. However, significant differences (P<0.05) in growth performance, feed efficiency and survival rate (SR) between the control and the fish fed with Me and UF combinations were observed. The body weight (BW) and...
Tipo: PhysicalObject Palavras-chave: Nile tilapia; Oreochromis niloticus; Melamine; Urea formaldehyde; Histology; Production index; Microscope; Growth performance; Toxicity; Feed efficiency; Survival rate; Diet contamination; ปลานิล; เมลามีน; ยูเรียฟอร์มัลดีไฮด์; สารเสริมอาหาร; ดัชนีผลผลิต; กล้องจุลทรรศน์; สมรรถนะการผลิต; การเจริญเติบโต; ประสิทธิภาพการใช้อาหาร; อัตราการรอดตาย; การปนเปื้อน; จุลพยาธิวิทยา.
Ano: 2013 URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5766
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Evaluation of the cytotoxic and genotoxic effects by melamine and cyanuric acid co-exposure in human embryonic kidney 293 cells BJMBR
Xu,Xianrong; Lu,Jing; Sheng,Hongqiang; Zhang,Long; Gan,Tieer; Zhang,Jianyun; Xu,Yuying; Zhu,Xinqiang; Yang,Jun.
The melamine and cyanuric acid (CA) complex has been suggested to cause the toxic effects observed in melamine-contaminated food or milk. However, the cytotoxic and genotoxic effects of co-exposure to melamine and CA are not fully clear. Therefore, the cytotoxic effects of melamine and CA were first examined by co‐exposure in human kidney 293 cells using the MTT assay. During a 24-h period for the three concentrations tested (0.5, 1, and 5 mg/mL), neither melamine nor CA alone showed significant toxic effects on 293 cells at 0.5 mg/mL, while higher concentrations led to decreased in cell viability. However, co-exposure to several combinations of melamine and CA [100:1, 10:1, 1:10, and 1:100 (v:v), at a final concentration of 0.5 mg/mL] did cause...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Melamine; Cyanuric acid; ΓH2AX; DNA damage; Genotoxicity.
Ano: 2020 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2020000500612
Registros recuperados: 5
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