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두 가지의 화학제재 첨가가 육계 깔짚내 질소와 수용성 인의 함량에 미치는 영향
최인학,남기홍,Choi I. H.,Nahm K. H. 한국가금학회 2004 韓國家禽學會誌 Vol.31 No.4
본 연구에서는 두 화학제재($FeSO_4$와 Alum)를 처리한 영향이 깔짚 위에서 육계를 42일간 사육한 후 깔짚내 질소와 수용성 인 함량에 어떤 차이가 있는지 대조구와 비교시험을 하였다. 2가지 실험은 처리구에서 깔짚 kg당 화학제재를 $FeSO_4$ $7H_2O$ 200 g이나 $Al_2(SO_4)_3$ $\cdot$ $14H_2O$ 200 g을 top dressing 한 후 그 각각을 대조구와 비교하였다. 사양시험에서는 총 64수(4처리$\times$4반복$\times$4수)의 육계를 배치하였다. 두 화학제재 처리구($FeSO_4$와 Alum)는 두 대조구와 비교할 때 pH는 통계적 유의성이 없었지만, 수용성 인 함량은 고도의 유의성이 인정되었다(P<0.01). 두 화학제재 처리구($FeSO_4$와 Alum)의 SRP 함량은 대조구 각각보다 $79\%$와 $60\%$의 감소를 보였다 $FeSO_4$ 처리구와 대조구간에는 EC, TC, $NH_4$-N, $NO_3$-N 및 IN 함량은 유의성이 없었지만, 수분, TN, ON, AN, PAN C:N 및 C:ON은 통계적 유의성이 인정되었다(P<0.01). Alum 처리구와 대조구의 결과는 EC, $NO_3$,-N, ON 및 C:ON을 제외한 수분, TC, TN, $NH_4$-N, IN, AN, PAN 및 C:N은 통계적 유의성이 인정되었다(P<0.05와0.01). 본 연구 결과를 다시 종합하면 깔짚에 두 화학제재를 각각 처리할 경우 깔짚내의 질소 함량은 높았으며 SRP함량을 감소시켰다. This study was conducted to determine the effects of two chemical additives on nitrogen (N) and soluble reactive phosphorus (SRP) contents in litter (rice hull) after broiler chicks were raised for 42 days. Two different additives were applied as a top dressing to the litter at a rate of 200 g ferrous sulfate $(FeSO_4)$ or 200 g aluminum sulfate [$Al_2(SO_4)_3$ $\cdot$ $14H_2O$, Alum] per kg litter, while the control group did not have the two chemicals added to the litter. A total of 64 broiler chicks (4 treatments$\times$4 replicates$\times$4 birds) were fed the experimental diets for 6 weeks. There was no difference in pH between the two chemical treatments and control group, but SRP content was significantly affected on it (P<0.01). SRP contents from ferrous sulfate and alum treated litter at 6 weeks were reduced by $79\%$ and $60\%$, respectively, as the two chemical treatments decreased the pH compared to the control group. In the ferrous sulfate treated litter, EC, TC, $NH_4-N$, $NO_3$-N, and IN contents did not show any difference between $FeSO_4$ treatment and control. However, the differences between $FeSO_4$ treatment and control were found in moisture, TN, ON, AN, PAN, C:N, and C:ON contents (P<0.01). As seen in the alum treated litter, there were differences in moisture, TC, TN, $NH_4-N$, IN, AN, PAN, and C:N contents between alum treatment and control (P<0.05 and 0.01) but no differences in EC, $NO_3-N$, ON, and C:ON. In conclusion, the results of this research show that ferrous sulfate and alum-treatment of poultry litter has the potential to increase N and reduce SRP content by lowering litter pH and moisture content.
최인학,Choi, In-Hag 한국환경과학회 2020 한국환경과학회지 Vol.29 No.1
The effects of liquid potassium permanganate (KMnO<sub>4</sub>) on the litter quality of poultry were investigated. Two-hundred-forty 0-day-old broiler chickens (Arbor Acres) were randomly assigned to two treatments with four replicated pens of 30 chickens each. Treatment liquid KMnO<sub>4</sub> at a rate of 50 g of liquid KMnO<sub>4</sub>/kg of poultry litter was sprayed onto the litter surface using a small hand pump; others served as a control that was applied without liquid KMnO<sub>4</sub> additions. Compared with controls, the treatment liquid KMnO<sub>4</sub> showed no differences in pH, total nitrogen and ammonia concentration. It was concluded that liquid KMnO<sub>4</sub> did not significantly increase poultry litter quality. Mechanisms relating to increasing litter pH and ammonia using liquid KMnO<sub>4</sub> are an oxidant agent (not acid-foaming agents).
두경부암 수술 후 메트로니다졸 예방적 사용의 임상적 유용성
최인학,이호영,김영찬,정광윤,백승국 대한이비인후과학회 2019 대한이비인후과학회지 두경부외과학 Vol.62 No.12
Background and Objectives Head and neck cancer surgery has a high risk of infection, becausesurgical fields are exposed to the oral cavity and the pharynx during surgery. The purposeof this study is to evaluate the usefulness of prophylactic metronidazole by identifying factorscontributing to postoperative fistulas in clean-contaminated head and neck cancer surgery. Subjects and Method A total of 234 patients underwent mucosa-opening surgery betweenJanuary 2002 and October 2015. Of those, 167 patients received conventional prophylactic antibioticsand 67 patients received metronidazole in addition to the conventional prophylactic antibiotics. Various clinical factors were evaluated to find association with postoperative fistula. Results The multivariate analysis showed that the tumor site, advanced T stage, and the preoperativetreatment were significantly associated with fistula formation, and the prophylacticuse of metronidazole significantly reduced the number of postoperative fistulas. Conclusion In cases where the incidence of postoperative fistulas are more likely to increase,such as in the advanced T stage, in oral/pharyngeal cancer, and preoperative non-surgical treatment,prophylactic metronidazole may be useful for preventing postoperative fistulas