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珍珠生长激素在合浦珠母贝育珠中的作用 被引量:11
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作者 金启增 黎辉 何慧 《热带海洋》 CSCD 1998年第4期44-50,共7页
以合浦珠母贝Pinctadamartensii(Dunker)作为珠母贝进行插核育珠试验,分别以其左、右边外套膜作为小片,并用珍珠生长激素浸泡小片。两个试验组用珍珠生长激素浸泡的小片各插核育珠贝200个,空白对照组用海水浸泡小片括核育珠贝207... 以合浦珠母贝Pinctadamartensii(Dunker)作为珠母贝进行插核育珠试验,分别以其左、右边外套膜作为小片,并用珍珠生长激素浸泡小片。两个试验组用珍珠生长激素浸泡的小片各插核育珠贝200个,空白对照组用海水浸泡小片括核育珠贝207个,育珠时间为6个多月。试验结束时,实验组珍珠的正圆珠率、白色珍珠比例以及珠层厚度比空白对照组分别提高了9.28%,22.57%和52μm。 展开更多
关键词 珍珠生长激素 插核育珠 珍珠质量 合浦珠母贝
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有益复合菌对育珠池水环境和珍珠生长的影响研究
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作者 杨品红 张倩 +2 位作者 李梦军 王晓艳 谢春华 《淡水渔业》 CSCD 北大核心 2005年第z1期73-75,共3页
从应用的实践出发,研究有益复合菌对育珠池的水环境及珍珠生长的影响.有益复合菌的主要成分为芽孢杆菌约80%,光合细菌(球形红假单胞菌)约占13%,噬菌蛭弧菌、放线菌、乳酸菌等.试验表明:有益复合菌的用量达3~9g/m3能明显降低水体中的CO... 从应用的实践出发,研究有益复合菌对育珠池的水环境及珍珠生长的影响.有益复合菌的主要成分为芽孢杆菌约80%,光合细菌(球形红假单胞菌)约占13%,噬菌蛭弧菌、放线菌、乳酸菌等.试验表明:有益复合菌的用量达3~9g/m3能明显降低水体中的COD、氨氮(NH4+-N)和硫化物(S2-)分别达36.56%、42.75%和41.67%.DO增加29.68%,提高育珠蚌的成活率13.78%(17.57%~20.92%)和珍珠的产量22.61%(16.09%~28.74%). 展开更多
关键词 有益复合菌 用量 育珠池 水环境 珍珠生长 影响
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Growth inhibitory effects of Phyllanthus niruri extracts in combination with cisplatin on cancer cell lines
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作者 Raimundo Fernandes de Araújo Júnior Luiz Alberto Lira Soares +6 位作者 Cínthia Raquel da Costa Porto Ranniere Gurgel Furtado de Aquino Hugo Gon alo Guedes Pedro Ros Petrovick Tatiane Pereira de Souza Aurigena Antunes de Araújo Gerlane Coelho Bernardo Guerra 《World Journal of Gastroenterology》 SCIE CAS CSCD 2012年第31期4162-4168,共7页
AIM:To investigate the cytotoxic effects of spray-dried extracts of Phyllanthus niruri in combination with cis- platin on two cancer cell lines. METHODS: Colorectal carcinoma (HT29) and human hepatocellular carcin... AIM:To investigate the cytotoxic effects of spray-dried extracts of Phyllanthus niruri in combination with cis- platin on two cancer cell lines. METHODS: Colorectal carcinoma (HT29) and human hepatocellular carcinoma (HepG2) cells were treated with spray-dried extracts of Phyllanthus niruri (SDEPN) either alone or in combination with cisplatin at differ- ent concentrations (0.5 mg/mL and 1 mg/mL) for 4 h and 24 h. To verify and quantify cancer cells treated with these products as well as identify the cell cycle stage and cell viability, we stained the cells with prop- idium iodide and assessed them by flow cytometry. The percentage of cells in different cell cycle phases was quantified and data were expressed as histo- grams. Significant differences between groups were determined using analysis of variance and Bonferroni's test, as indicated. A value of P 〈 0.05 was considered to be statistically significant. RESULTS: SDEPN had significantly different cyto- toxic effects on HT29 (2.81 4- 0.11 vs 3.51 4- 1.13, P 〉 0.05) and HepG2 (5.07± 0.3 vs 15.9 ± 1.04, P 〈 0.001) cells when compared to control cells for 4 h. SDEPN also had significantly different cytotoxic effects on HT29 (1.91 ± 0.57 vs 4.53± 1.22, P 〉 0.05) and HepG2 (14.56 ± 1.6 vs 35.67 ± 3.94, P 〈 0.001) cells when compared to control cells for 24 h. Both cell lines were killed by cisplatin in a dose-dependent manner compared to control cells (HepG2 cells for 4 h: 10.78 ± 1.58 vs 53.89 ± 1.53, P 〈 0.001; 24 h: 8.9 ± 1.43 vs 62.78 ± 1.87, P 〈 0.001 and HT29 cells for 4 h: 9.52 ±0.913 vs 49.86 ± 2.89, P 〈 0.001; 24 h: 11.78 ± 1.05 vs 53.34 ± 2.65, P 〈 0.001). In HT29 cells, pretreat- ment with SDEPN and subsequent treatment with cis-platin resulted in a greater number of cells being killed (12.78 ± 1.01 vs 93.76 ± 1.6, P 〈 0.001). HepG2 cells showed significant cell killing with treatment with SDEPN when combined with cisplatin (12.87 ± 2.78 vs 78.8 ± 3.02, P 〈 0.001). CONCLUSION: SDEPN is selectively toxic against two cancer cell lines. Moreover, SDEPN in combination with cisplatin induces a synergistic increase in the cell death of both HT29 and HepG2 cells. 展开更多
关键词 CISPLATIN Colorectal cancer Liver cancer Phyllanthus n/ruri Cytotoxic effect
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The growth of the screw dislocation of nacreous layer on Pteria penguin 被引量:3
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作者 QI LiJian HUANG YiLan +1 位作者 ZHOU ZuYi ZHOU ZhengYu 《Science China Earth Sciences》 SCIE EI CAS 2011年第7期951-958,共8页
In response to various environmental factors in offshore South China Sea,a group of microstructures of the screw dislocation are assembled in multiphase screw dislocations on the surface of the nacreous layer of Pteri... In response to various environmental factors in offshore South China Sea,a group of microstructures of the screw dislocation are assembled in multiphase screw dislocations on the surface of the nacreous layer of Pteria penguin from the coastal waters of Hainan Island,China.The results of the transmission and scanning electronic microscope testing show that organic matter periodically secreted by epithelial histology of mantle of Pteria penguin pre-forms the original screw dislocation growth tem-plate in the form of film,along with its function to select,identify,and adhere to the amorphous calcium carbonate particles as the fine organic venations diffused in the epitaxial screw growth area.With the inducement and screw modulation of the or-ganic film and venations,the amorphous calcium carbonate particles gradually evolve into the pseudohexagonal self.aragonite microsheet with long-range order and screw dislocation structure by location-selecting tropism and screw dislocation growth.Numerous micron-scale aragonite microsheets join in the cluster's interactive movement and screw dislocation self-assembly of the organic film,stacking forward along the axis C spirally and forming the nacreous layer with screw dislocation structure. 展开更多
关键词 Pteria penguin nacreous layer organic film aragonite micro sheet screw dislocation
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