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題 名 | Evaluation of the Toxicity of Nano-calcium Carbonates and Their Effects on Anti-heat Stress in Laying Hens=奈米化碳酸鈣毒性之評估與其對蛋雞抗熱緊迫之效果 |
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作 者 | 王明駿; 陳清錦; 黃婕婷; 黃振文; 陳洵一; | 書刊名 | 中國畜牧學會會誌 |
卷 期 | 46:3 2017.09[民106.09] |
頁 次 | 頁223-234 |
分類號 | 437.714 |
關鍵詞 | 急性毒性; 抗熱緊迫; 基因毒性; 蛋雞; 奈米碳酸鈣; Acute toxicity; Anti-heat stress; Genotoxicity; Laying hens; Nano-calcium carbonate; |
語 文 | 英文(English) |
中文摘要 | 本研究針對奈米化碳酸鈣(nano-calcium carbonates, NCC) 對動物的毒性進行 探討,並檢視其對蛋雞抗熱緊迫之影響。兩種奈米化碳酸鈣(A 與 B),係由大理石 材切割後產生的碎片經鍛燒(calcination)進行奈米化所製成。八周齡 C57BL/6 小 鼠經奈米碳酸鈣 A 或B 分別以 2 或 8 g/kg 兩種劑量每日灌食達 2 周,無死亡案例 發生,攝食量、體重與行為均與對照組無明顯差異,而肝、腎之組織切片亦未觀 察到病理上異狀。小鼠周邊紅血球微核(Micronucleated Polychromatic Erythrocytes, MNPCE) 分析顯示奈米化碳酸鈣對紅血球微核(micronucleus)化產生亦無影響, 此意謂奈米化碳酸鈣無基因毒性(genotoxicity)的風險。蛋用土雞於 40 周齡分別 於飼糧或飲水中添加 0.05 或 0.1% 奈米碳酸鈣 A 進行抗熱緊迫參數分析,每周一 次達 6 周。結果顯示飼糧與飲水中兩種劑量奈米碳酸鈣 A 處理皆會降低血液pH 值(P < 0.05),但對肛溫與產蛋率沒有影響。相較於對照組與其他處理組,飲水 中添加 0.1% 奈米碳酸鈣A 有最高蛋殼強度(P < 0.05),而飼糧添加 0.1% 奈米碳 酸鈣A 能提高蛋新鮮度(P < 0.05),兩種劑量於飲水中添加與飼糧添加 0.1% 奈 米碳酸鈣A 皆能提高雞隻飲水量(P < 0.05)。以上結果顯示兩種奈米碳酸鈣材料 不會造成急性動物中毒與基因毒性,而飲水中添加奈米碳酸鈣可提供蛋雞額外鈣 源,以補充流失的鈣,進而提升蛋殼品質,同時可能藉由提高飲水量以減緩熱緊 迫參數。 |
英文摘要 | The acute toxicity of nano-calcium carbonates (NCC), calcinated from natural marbles was examined and its efficacy as an anti-heat stress agent in laying hens was evaluated. Eight week-old C57BL/6 mice were orally infused with NCC A or B (2 or 8g/kg body weight) every day for 2 weeks. No significant differences were observed in mortality, feed intake, body weight, behaviors, or hepatic and renal pathology by NCC treatments. In MNPCE (micronucleated polychromatic erythrocytes) analysis, the frequency of micronuclei was not affected by NCC A and B infusion, suggesting no genotoxicity risk for NCC exposure. Egg-type country chicken hens at age of 40 weeks were provided with NCC A supplemented in diets or drinking water (0.05 or 0.1%) for weekly anti-heat stress parameter measurements for 6 weeks. Results suggested that both levels of NCC supplementation either in diet or in drinking water significantly reduced blood pH value (P < 0.05), with no effects on rectal temperature and egg production rate. Among the control and treatment groups, birds with 0.1% NCC A supplementation in water exhibited stronger eggshell strength (P < 0.05), and hens with 0.1% NCC A in diets had a better egg freshness index than the control (P < 0.05). Both 0.05% and 0.1% NCC A in drinking water, as well as dietary inclusion of 0.1% NCC A promoted water intake (P < 0.05). In conclusion, the present results suggested that NCC exerted no acute toxicity or genotoxicity in animals. NCC supplementation in drinking water enhanced eggshell strength possibly through an increase of calcium supply and availability, promoted water intake to dissipate heat, and thereby ameliorate heat stress parameters in laying hens. |
本系統中英文摘要資訊取自各篇刊載內容。