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钯前驱体对生物柴油加氢异构催化剂性能的影响 被引量:1
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作者 贾云刚 张铁珍 +2 位作者 邓旭亮 吴显军 李海岩 《现代化工》 CAS CSCD 北大核心 2023年第4期194-197,204,共5页
以硝酸钯[Pd(NO_(3))_(2)]、氯钯酸[H_(2)PdCl_(6)]、二硝基四氨合钯[Pd(NH_(3))_(4)(NO_(3))_(2)]为浸渍液制备了Pd/SAPO-31双功能催化剂,考察了钯盐前驱体对生物柴油加氢异构性能的影响。利用N2物理吸附、NH3-TPD、Py-IR和H_(2)化学... 以硝酸钯[Pd(NO_(3))_(2)]、氯钯酸[H_(2)PdCl_(6)]、二硝基四氨合钯[Pd(NH_(3))_(4)(NO_(3))_(2)]为浸渍液制备了Pd/SAPO-31双功能催化剂,考察了钯盐前驱体对生物柴油加氢异构性能的影响。利用N2物理吸附、NH3-TPD、Py-IR和H_(2)化学吸附等对催化剂进行表征。结果表明,最适宜的钯前驱体为硝酸钯[Pd(NO_(3))_(2)]。在固定床反应器中进行正十六烷的异构化反应的最佳条件为:催化剂用量为200 mL、压力为2.0 MPa、反应温度为350℃、空速为1.5、氢油比为500∶1,此时,正十六烷的转化率最高可达85%以上。当凝固点为0℃、闪点为60℃、十六烷值为74时,生物柴油的产率最高,为92.2%。 展开更多
关键词 钯前驱体 SAPO-31 加氢异构 生物柴油
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超重力法制备气相醛加氢催化剂中试放大研究 被引量:1
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作者 吴显军 李凤铉 +2 位作者 王刚 刘彦峰 胥占风 《现代化工》 CAS CSCD 北大核心 2023年第3期226-229,234,共5页
在超重力共沉淀中试装置上进行了铜基气相醛加氢催化剂制备放大试验。研究发现,在超重力机转速1 200 r/min、中和温度80℃、pH 7.5、老化温度80℃、老化时间30 min及焙烧温度380℃条件下,制得催化剂的比表面积高、CuO晶粒度低,活性组分... 在超重力共沉淀中试装置上进行了铜基气相醛加氢催化剂制备放大试验。研究发现,在超重力机转速1 200 r/min、中和温度80℃、pH 7.5、老化温度80℃、老化时间30 min及焙烧温度380℃条件下,制得催化剂的比表面积高、CuO晶粒度低,活性组分分散度较好。以某石化公司丁辛醇装置丁醛和辛烯醛为原料,通过催化剂加氢评价考察催化剂活性结果显示,中试放大催化剂原料转化率及产品选择性均高于99%,且在空速高出约14%情况下,产品性质与参比剂相当,且产品杂质含量略低,表明放大剂活性略好于参比剂。 展开更多
关键词 超重力 醛加氢 催化剂 中试
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六件宋代温州漆器成分结构及工艺剖析 被引量:5
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作者 李晓远 伍显军 +3 位作者 温巧燕 谢忠簿 沈新宇 童华 《文物保护与考古科学》 北大核心 2018年第4期44-52,共9页
为用现代化学分析手段来揭示古代漆器的髹漆工艺,对六件宋代温州漆器残片成分和髹漆工艺进行了分析。在利用现代化学分析方法,借助扫描电子显微镜、X-射线能谱仪、激光共聚焦拉曼光谱、红外光谱、X-射线粉末衍射、体视显微镜等对漆器残... 为用现代化学分析手段来揭示古代漆器的髹漆工艺,对六件宋代温州漆器残片成分和髹漆工艺进行了分析。在利用现代化学分析方法,借助扫描电子显微镜、X-射线能谱仪、激光共聚焦拉曼光谱、红外光谱、X-射线粉末衍射、体视显微镜等对漆器残片漆膜成分展开分析。结果表明,红色漆膜的主要成分是朱砂(硫化汞),黑色漆膜的主要显色成分可能是炭黑;漆膜结构劣化降解明显,存在多种微缺陷;漆膜中成膜成分是生漆;截面分层明显;银扣漆器中的扣体成分是锡和二氧化锡的混合物而不是金属银,应命名为锡扣漆器;戗金和描金残片漆灰部分的X射线粉末衍射的分析结果表明漆灰层中有添加动物灰的做法。 展开更多
关键词 温州漆器 漆膜 漆灰 髹漆工艺
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轴向激励弹性连接双刚性球低频声辐射计算及分析 被引量:1
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作者 赵腾瑞 伍先俊 孙红灵 《船舶力学》 EI CSCD 北大核心 2022年第10期1549-1562,共14页
大潜深水下航行器一般采用多舱体结构,研究多舱体减振降噪方法意义重大。本文以球舱为例,利用球函数的平移加法理论,建立水下两个刚性球轴向振动产生的辐射声场的解析计算模型,比较100 Hz以下刚性模态的低频段内刚性球之间不同连接方式... 大潜深水下航行器一般采用多舱体结构,研究多舱体减振降噪方法意义重大。本文以球舱为例,利用球函数的平移加法理论,建立水下两个刚性球轴向振动产生的辐射声场的解析计算模型,比较100 Hz以下刚性模态的低频段内刚性球之间不同连接方式的辐射声场特性。计算结果表明,球体之间采用弹性连接能减小非受力刚性球的振速幅度,而且使两刚性球的振速相位之间存在相反的频段,各个刚性球的辐射声压相位相反,叠加时各部分声压会相互抵消,两球辐射强度相近时,声源级出现明显的谷点,激励力作用在等效密度大的球舱比作用在等效密度小的球舱降噪效果更好。该研究结论可以为水下航行器的多舱体低噪声设计提供参考。 展开更多
关键词 刚性球 声辐射 弹性连接
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VAH醛加氢催化剂在异丙醇装置上的工业应用
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作者 李凤铉 王刚 +2 位作者 吴显军 刘彦峰 李建昌 《现代化工》 CAS CSCD 北大核心 2021年第8期236-238,共3页
VAH醛加氢催化剂在青岛某异丙醇装置上首次实现工业应用,标定结果显示,在投料负荷105.6%工况下,丙酮转化率为99.78%,异丙醇选择性为99.68%;装置跟踪结果显示,催化剂床层热点上移速率平缓,异丙醇收率稳定且始终高于99.0%。
关键词 醛加氢 丙酮 异丙醇 催化剂
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3种蓝细菌藻蓝蛋白β亚基脱辅基蛋白基因的克隆、表达及重组蛋白的抗氧化活性 被引量:3
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作者 伍贤军 杨红 +2 位作者 盛怡 冷倩男 李萍萍 《江苏农业学报》 CSCD 北大核心 2018年第5期998-1004,共7页
为研究蓝细菌藻蓝蛋白脱辅基蛋白的抗氧化活性,分别从3种蓝细菌Spirulina subsalsa、Mastigocladus laminosus和Nostoc PCC 7120中克隆C-藻蓝蛋白β亚基编码基因cpcB_(Sp)、cpcB_(Ma)和cpcB_(No),在大肠杆菌中表达,获得了重组蛋白CpcB_(... 为研究蓝细菌藻蓝蛋白脱辅基蛋白的抗氧化活性,分别从3种蓝细菌Spirulina subsalsa、Mastigocladus laminosus和Nostoc PCC 7120中克隆C-藻蓝蛋白β亚基编码基因cpcB_(Sp)、cpcB_(Ma)和cpcB_(No),在大肠杆菌中表达,获得了重组蛋白CpcB_(Sp)、CpcB_(Ma)和CpcB_(No)。通过测定其对羟基自由基和DPPH自由基的清除率,比较它们的抗氧化活性。结果显示:3种重组蛋白对羟基自由基和DPPH自由基的清除率都随着蛋白质质量浓度的增加而升高。当蛋白质浓度达到250 mg/L时,CpcB_(Sp)、CpcB_(Ma)和CpcB_(No)对羟基自由基的清除率分别为82%、89%和93%,对DPPH自由基的清除率分别为43%、49%和58%。以上结果表明,3种重组藻蓝蛋白脱辅基蛋白都具有较高的抗氧化活性,有潜力作为医疗上使用的抗氧化试剂,不同蓝细菌的同源藻蓝蛋白的抗氧化能力存在一定差异,选择不同蓝细菌的藻蓝蛋白是提高重组藻蓝蛋白抗氧化能力的有效途径。 展开更多
关键词 藻蓝蛋白 抗氧化活性 重组蛋白 自由基
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Natural Homologous Triploidization and DNA Methylation in SARII-628,a Twin-seedling Line of Rice (Oryza sativa) 被引量:2
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作者 PENG Hai ZHANG Hong-yu +3 位作者 LI Yun XU Pei-zhou WANG Xu-dong wu xian-jun 《Rice science》 SCIE 2007年第4期265-271,共7页
A total of five pairs of diploidotriploid twin-seedlings (a diploid seedling and a triploid seedling emerged from a grain) were selected out from 4500 pairs of seedlings from SARII-628, a twin-seedling rice line. SS... A total of five pairs of diploidotriploid twin-seedlings (a diploid seedling and a triploid seedling emerged from a grain) were selected out from 4500 pairs of seedlings from SARII-628, a twin-seedling rice line. SSR analysis indicated that no difference between the diploid seedling and corresponding triploid seedling in a twin-seedling was found at the 310 loci, indicating that there was no obvious change in DNA primary structure. A modified AFLP technique 'MSAP (methylation-sensitive AFLP)' was used to analyze methylation mutation. Although no methylation mutation was noted among the five diploids, 29 methylation mutation loci were found from the corresponding triploids. This suggested that methylation mutation happened rapidly on Mogeneration after natural homologous triploidization. The mutations were classified into 10 types, including 3 increased types, 3 decreased types and 4 undecided types of methylation-degrees. The bands of 22 loci were sequenced and then those sequences were searched through website. The result showed that the methylation mutation involved into the whole rice genome and the 12 pairs of chromosomes. The mutation trend was site-related and there were different mutation loci for different triploids, which foretold that SARII-628 would have different evolution fates after natural homologous triploidization. 展开更多
关键词 twin-seedling DIPLOID triploidization DNA methylation rice (Oryza sativa)
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Genetic Analysis of Early Generation Stability in Rice 被引量:2
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作者 ZHOU Li-Jun Ao Guang-Hui +2 位作者 XIAO Yi wu xian-jun LI Shi-Gui 《Rice science》 SCIE 2005年第4期249-254,共6页
The mechanism of early generation stability (EGS) in rice was studied via genetic analysis. Three types of crosses were made, namely between EGS varieties, EGS and conventional rice variety, and conventional rice va... The mechanism of early generation stability (EGS) in rice was studied via genetic analysis. Three types of crosses were made, namely between EGS varieties, EGS and conventional rice variety, and conventional rice varieties. The genetic analysis was based on the stable lines in F2 population. The stable lines may appear from some combinations of EGS rice crossing with each other and EGS rice crossing with conventional varieties at different frequencies, but stable lines didn't appear in conventional varieties crossing with conventional varieties. Genetic analysis results indicated that the EGS phenomena should just exist in special rice materials, and the frequency of stable lines was closely related to the EGS traits of parents. The EGS traits were neither qualitative nor quantitative traits, and they were controlled by neither dominant genes nor recessive genes. The EGS traits might be inherited by F1 single plant, and the traits of F3 and F4 were corresponded to those of F2 population, i.e. F3 and F4 lines derived from non-segregating F2 showed uniform agronomic traits, and those from segregating F2.did not. The agronomic traits of EGS lines were consistent with those of F1 single plant. On the other hand, when EGS lines occurred, the segregating lines in Mendelian manner were also observed in all F2 population of the same combination. It was suggested that the reason why the stable strains occurred might be a special factor to control (open/close) gene at the beginning of cell division in zygote, resulting in closing mitosis and opening somatic reduction. The somatic reduction of zygote resulted in recombination and homozygosity forming in F1 single plant, and some lines with uniform agronomic traits were observed in some lines of F2 population. 展开更多
关键词 rice (Oryza safiva) early generation stability stable line genetic analysis
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Effect of Light on Flavonoids Biosynthesis in Red Rice Rdh 被引量:2
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作者 HAN Lei DONG Bao-cheng +3 位作者 YANG Xiao-ji HUANG Cheng-bin WANG Xu-dong wu xian-jun 《Agricultural Sciences in China》 CAS CSCD 2009年第6期746-752,共7页
The effect of light on flavonoids biosynthesis in red rice Rdh was studied. The panicles of red rice Rdh produced colorless caryopses after darkness treatment; and these colorless caryopses displayed bright-red after ... The effect of light on flavonoids biosynthesis in red rice Rdh was studied. The panicles of red rice Rdh produced colorless caryopses after darkness treatment; and these colorless caryopses displayed bright-red after vanillin treatment, but did not display red color after light inducing for 15 days, suggesting that red rice Rdh could produce leucoanthocyanidin, but could not produce polyproanthocyanidins in darkness. Histological study revealed that the aleurone layers of Rdh colorless caryopses displayed bright-red after vanillin assay, but the pericarp and seed coat layers did not display color change, which indicated that the aleurone layers could accumulate precursors of polyproanthocyanidins in darkness, but the pericarp and seed coat could not. Additionally, color ofRdh caryopses changed from green in immaturity to red in maturity, and the green caryopses changed color from green to red gradually indoor for 7 days after harvest, suggesting that leucoanthocyanidins could synthesize polyproanthocyanidins. It was concluded that light was necessary for red pigment biosynthesis in red rice Rdh, leucoanthocyanidins biosyntheses in the aleurone layers did not need light, leucoanthocyanidins biosynthesis in pericarp and seed coat needed light inducing, the effect of leucoanthocyanidin biosynthesis in Rdh to light had tissue specificity. 展开更多
关键词 red rice flavonoid LIGHT
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Tissue Culture Responses from Different Explants of Rice 被引量:1
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作者 WANG Xiu-hong SHI Xiang-yuan wu xian-jun 《Rice science》 SCIE 2005年第3期229-232,共4页
Different culture explants, including anther, young panicle, young embryo, and mature embryo, from 19 rice varieties were used for callus induction and green plantlet differentiation. The culture efficiency differed s... Different culture explants, including anther, young panicle, young embryo, and mature embryo, from 19 rice varieties were used for callus induction and green plantlet differentiation. The culture efficiency differed significantly among the four types of explants, and varied from genotype to genotype. Callus induction frequency presented significantly positive correlation each between anther and young panicle, anther and mature embryo, and young panicle and young embryo. Green plantlet differentiation showed no relationship between different types of explants. In addition, no relationship was found between callus induction frequency and green plantlet differentiation frequency. 展开更多
关键词 RICE EXPLANT callus induction frequency green plantlet differentiation frequency CORRELATION
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Special DNA Methylated Sites Between Haploid of Twin-Seedling and Its Hybrids in Rice(Oryza sativa) 被引量:1
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作者 wu Shao-hua XUE Jing-jing +2 位作者 ZHANG Hong-yu Xu Pei-zhou wu xian-jun 《Rice science》 2012年第2期94-99,共6页
DNA methylation is one of the epigenetic phenomena which can be transferred to the offspring by cell division in the evolution of organisms. The epigenetic regulation accompanied by gene expression can be found direct... DNA methylation is one of the epigenetic phenomena which can be transferred to the offspring by cell division in the evolution of organisms. The epigenetic regulation accompanied by gene expression can be found directly in the phenotype of haploidy plants. DNA cytosine methylation at the 5'-CpCpGpG sites of haploid, Shuhui 527, Shuhui 363 and their hybrids was analyzed by methylation sensitive amplification polymorphism (MSAP) method. There were 765 DNA methylated sites detected and the methylation level was lower in hybrids than parents. Meanwhile, the different bands between hybrids and parents were analyzed and two types of methylated sites were detected, of which one inherited from haploid, and the other did not. The biological functions of genes related to methylated sites involved in cell structure, metabolize and response factor. Therefore, DNA methylated modifications can activate and silence the genes and play an important role in plant growth, development and evolution. 展开更多
关键词 twin-seedling rice HAPLOID methylation sensitive amplification polymorphism DNA methylation
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科研为导向的“环境生物学”研究性教学实践与思考 被引量:2
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作者 伍贤军 李萍萍 +1 位作者 朱咏莉 张银龙 《教育教学论坛》 2017年第50期227-229,共3页
"环境生物学"是环境科学本科专业的基础课程,是生命科学与环境科学的新兴交叉学科,主要面向大学二年级学生。基于其实验性强以及学科交叉的特点,很适合使用研究性教学的方法。本文从当代"环境生物学"教学研究出发,... "环境生物学"是环境科学本科专业的基础课程,是生命科学与环境科学的新兴交叉学科,主要面向大学二年级学生。基于其实验性强以及学科交叉的特点,很适合使用研究性教学的方法。本文从当代"环境生物学"教学研究出发,结合"环境生物学"课程主讲教师的教学实践,提出新颖的教学思路:构建以科学素养为导向的"环境生物学"教学内容;以科研创新为导向的研究性教学方法;开展多种形式的科学研究活动。以此提高"环境生物学"的教学质量,培养具有科研能力和创新意识的高素质环境人才。 展开更多
关键词 研究性教学 “环境生物学” 科研创新 科学素养
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Analysis of Chloroplast Ultrastructure,Photosystem Ⅱ Light Harvesting Complexes and Chlorophyll Synthesis in a Chlorophyll-Less Rice Mutant W2555
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作者 Xu Pei-zhou LI Yun +4 位作者 YUAN Shu ZHANG Hong-yu WANG Xu-dong LIN Hong-hui wu xian-jun 《Rice science》 SCIE 2006年第4期265-270,共6页
A comparative study on chloroplast ultrastructure and light harvesting complex of photosystem Ⅱ (LHC Ⅱ) was conducted between a new rice mutant (W2555) and its wild type (WT). The chloroplasts of W2555 had les... A comparative study on chloroplast ultrastructure and light harvesting complex of photosystem Ⅱ (LHC Ⅱ) was conducted between a new rice mutant (W2555) and its wild type (WT). The chloroplasts of W2555 had less thylakoids and grana stacks compared with the wild type. There was no significant change in the composition of LHC Ⅱ polypeptide in W2555, while a decline had been noted in LHC Ⅱ content. Northern blot analysis with a specific cab gene probe showed no appreciable difference in the LHC Ⅱ mRNA level between the W2555and its wild type. The precursors of chlorophyll synthesis, 6-aminolevulinic acid (ALA) and porphobilinogen (PBG) were over accumulated in W2555, but the other precursors were all decreased. These results indicated that the decreased level of LHC Ⅱ in the mutant W2555 was attributed to the change of cab gene transcription, but a blockage in chlorophyll biosynthesis due to the formation of uroporphyrinogen Ⅲ (Urogen Ⅲ). 展开更多
关键词 chloroplast ultrastructure photosystem chlorophyll synthesis precursors chlorophyll-less mutant RICE
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Genetic Analysis and Gene Mapping of Multi-tiller and Dwarf Mutant d63 in Rice
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作者 XUE Jing-jing wu Shao-hua +2 位作者 ZHANG Hong-yu XU Pei-zhou wu xian-jun 《Rice science》 SCIE 2013年第3期179-184,共6页
A spontaneous mutation, tentatively named d63, was derived from the twin-seedling progenies of rice crossed by diploid SARIII and Minghui 63. Compared with wild-type plants, the d63 mutant showed multiple abnormal phe... A spontaneous mutation, tentatively named d63, was derived from the twin-seedling progenies of rice crossed by diploid SARIII and Minghui 63. Compared with wild-type plants, the d63 mutant showed multiple abnormal phenotypes, such as dwarfism, more tillers, smaller flag leaf and reduced seed-setting rate and 1000-grain weight. In this study, two F2 populations were developed by crossing between d63 and Nipponbare, d63 and 93-11. Genetic analysis indicated that d63 was controlled by a single recessive gene, which was located on the short arm of chromosome 8, within the genetic distance of 0.40 cM from RM22195. Hence, D63 might be a new gene as there are no dwarf genes reported on the short arm of chromosome 8. 展开更多
关键词 RICE multi-tiller and dwarf mutant genetic analysis gene mapping
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Characterization and Genetic Analysis of a Novel Mutant mst of Rice Defective in Flower Development
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作者 LI Yun XU Pei-zhou +4 位作者 ZHANG Hong-yu FU Shao-hong YANG Jin ZHANG Ru-quan wu xian-jun 《Rice science》 SCIE 2009年第1期75-78,共4页
A spontaneous mutant with multiple stigmas (msf) was found in an indica rice line 466. The mst mutant exhibits normal at the vegetative development stage and produces normal inflorescence structures. The difference ... A spontaneous mutant with multiple stigmas (msf) was found in an indica rice line 466. The mst mutant exhibits normal at the vegetative development stage and produces normal inflorescence structures. The difference between the mutant and the wild type was observed when the stamen primordium began to develop. In the mst florets, palea and lemma opened, Iodicules were homeotically transformed into palea/lemma-like structures, and stamens were homeotically transformed into carpel-like structures. It looked like multiple stigmas being full of the whole floret. The phenotypic changes of rest were very similar to that of B-like mutant spwl. Compared with other mutants with pistillate morphologies, the severe mstflorets showed that the inner three floral organs were completely changed into palea/lemma-like structures. Moreover, the mutant was female sterile. Occasionally, with the changing environment, one or two stamens were fertile. Genetic analysis indicated that the mutant traits were controlled by a single recessive gene. 展开更多
关键词 RICE flower development multiple stigmas mutant floral organ identity
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建党以来中国共产党劳资关系认识的阶段性演变及其启示
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作者 吴贤军 《湖北经济学院学报》 2021年第4期5-11,共7页
中国共产党成立以来,以马克思的劳动观和阶级关系理论为指导,结合各个历史时期的主要矛盾和具体问题,灵活多样地引导保障劳动条件、减少劳动强度等维权问题,从而按照劳资关系紧张程度的前后变化,可以划分为斗争、限制、融合、冲突、缓... 中国共产党成立以来,以马克思的劳动观和阶级关系理论为指导,结合各个历史时期的主要矛盾和具体问题,灵活多样地引导保障劳动条件、减少劳动强度等维权问题,从而按照劳资关系紧张程度的前后变化,可以划分为斗争、限制、融合、冲突、缓和五个阶段,以及依据具体事件进一步划分的演变情况。这种阶段性演变的过程,既体现出革命斗争的阶级性,又展示了社会制度的优越性,还表现为初级阶段的现实性。中国共产党领导人不是简单套用马克思劳动论述,而是将劳资关系平衡、自身角色定位以及实事求是的辩证思想充分结合,尝试走出一条符合中国国情的劳动政策和劳动管理之路,进而为中国共产党百年劳动思想的塑造打下坚实的基础。 展开更多
关键词 中国共产党 劳资关系 阶段性演变
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三系杂交水稻恢复系蜀恢5183的选育 被引量:2
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作者 廖泳祥 徐培洲 +13 位作者 吴先军 张红宇 陈晓琼 田芸峰 刘禹彤 高克富 杨洪松 郑建国 罗泉兴 向光荣 姜建莲 高晓彬 敬树忠 余毅 《杂交水稻》 CSCD 北大核心 2020年第6期24-26,共3页
蜀恢5183是利用成恢727作母本与蜀恢498杂交选育的籼型三系杂交水稻恢复系。该恢复系具有综合农艺性状优良、配合力高、易于制种和稻瘟病抗性较强等特点,于2017年通过四川省田间技术鉴定。所配组合内优6183(内香6A/蜀恢5183)和川康优583... 蜀恢5183是利用成恢727作母本与蜀恢498杂交选育的籼型三系杂交水稻恢复系。该恢复系具有综合农艺性状优良、配合力高、易于制种和稻瘟病抗性较强等特点,于2017年通过四川省田间技术鉴定。所配组合内优6183(内香6A/蜀恢5183)和川康优583(川康606A/蜀恢5183)已分别通过四川省审定和重庆市初审。介绍了蜀恢5183的选育体会并对水稻育种目标进行了讨论。 展开更多
关键词 杂交水稻 恢复系 蜀恢5183 选育
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优质高产杂交水稻新组合蓉7优313 被引量:1
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作者 廖泳祥 徐培洲 +13 位作者 吴先军 张红宇 陈晓琼 田芸峰 刘禹彤 高克富 杨洪松 郑建国 罗泉兴 向光荣 姜建莲 高晓彬 彭甦 张向阳 《杂交水稻》 CSCD 北大核心 2021年第1期119-121,共3页
蓉7优313是四川农业大学水稻研究所利用不育系蓉7A与自育恢复系蜀恢313配组育成的优质高产三系杂交水稻新组合。该组合具有米质优、产量高、生育期适中、株叶型好等特点,2019年10月通过国家农作物品种审定委员会审定(国审稻20190058)。
关键词 杂交水稻 蓉7优313 优质 选育
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同位素稀释超高效液相-串联质谱法检测大鼠尿液中RNA氧化标志物8-羟基鸟苷
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作者 赵素玉 李付远 +3 位作者 叶玲燕 吴仙军 喻晖 梅益斌 《中国卫生检验杂志》 CAS 2022年第3期341-344,349,共5页
目的建立一种可快速和高效检测大鼠尿液中RNA氧化产物8-羟基鸟苷(8-oxo Guo)的同位素稀释超高效液相-串联质谱法(ID-UPLC-MS/MS)。方法大鼠尿液经10 mmol的乙酸铵处理,加入同位素内标[^(15)N_(2)^(13)C_(1)]8-oxo Guo,置于37℃生化培养... 目的建立一种可快速和高效检测大鼠尿液中RNA氧化产物8-羟基鸟苷(8-oxo Guo)的同位素稀释超高效液相-串联质谱法(ID-UPLC-MS/MS)。方法大鼠尿液经10 mmol的乙酸铵处理,加入同位素内标[^(15)N_(2)^(13)C_(1)]8-oxo Guo,置于37℃生化培养箱孵育10 min,4℃12000×g离心15 min,以含0.1%甲酸的5 mmol乙酸铵和甲醇为流动相,经色谱柱SB-Aq(3.0 mm×100 mm,1.8μm)分离,在多反应监测(MRM)模式下监测m/z 300/168(8-oxo Guo)及m/z 303/171([^(15)N_(2)^(13)C_(1)]8-oxo Guo),内标法定量。结果本检测方法在0.4 ng/ml~100 ng/ml线性关系良好,相关系数为0.9998,最小检测质量为0.1 pg,低、中、高3个浓度(0.4 ng/ml、10 ng/ml、100 ng/ml)的回收率分别为(106.54±11.71)%、(107.95±3.47)%、(109.70±4.18)%,相对标准偏差(n=6)为3.21%~10.99%。结论本研究建立的检测方法简便、灵敏、快速、高效,可较好地应用于评价机体氧化应激所导致的RNA氧化损伤。 展开更多
关键词 同位素稀释超高效液相-串联质谱法 大鼠 尿液 8-羟基鸟苷
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盐泽螺旋藻藻蓝蛋白裂合酶CpcS的分子克隆及功能研究
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作者 盛怡 李慧敏 +3 位作者 伍贤军 杨红 朱咏莉 李萍萍 《农业现代化研究》 CSCD 北大核心 2019年第6期1048-1055,共8页
为研究盐泽螺旋藻(Spirulina subsalsa)藻蓝蛋白裂合酶CpcS的催化功能,首先通过PCR技术从S. subsalsa FACHB351基因组DNA中扩增藻蓝蛋白裂合酶的编码基因SscpcS,构建表达质粒pCDFDuet-SscpcS,然后再与脱辅基蛋白和色素合成酶表达质粒pET... 为研究盐泽螺旋藻(Spirulina subsalsa)藻蓝蛋白裂合酶CpcS的催化功能,首先通过PCR技术从S. subsalsa FACHB351基因组DNA中扩增藻蓝蛋白裂合酶的编码基因SscpcS,构建表达质粒pCDFDuet-SscpcS,然后再与脱辅基蛋白和色素合成酶表达质粒pETDuet-SscpcB-Ssho1::SspcyA共同转入大肠杆菌BL21(DE3),并经IPTG(Isopropyl β-D-Thiogalactoside,异丙基硫代半乳糖苷)诱导重组合成藻蓝蛋白。PCR产物测序表明SscpcS扩增成功;双酶切检测和SDS-PAGE电泳分析表明质粒pCDFDuet-SscpcS构建成功,且能表达目的蛋白。重组藻蓝蛋白PCB-CpcB细胞产物为深蓝色;纯化后的色素蛋白展现620 nm的最大吸收峰和646 nm的最大荧光发射峰;色素蛋白通过锌离子染色,在紫外线照射下展现明显荧光。该研究成功克隆源自盐泽螺旋藻的藻蓝蛋白裂合酶SsCpcS的编码基因,其表达产物SsCpcS能有效催化藻蓝蛋白的生物合成。此研究为S. subsalsa藻蓝蛋白的重组合成及抗氧化试剂的研制奠定基础,也为探明盐泽螺旋藻中CpcS的催化机理提供科学依据。 展开更多
关键词 盐泽螺旋藻 裂合酶 藻蓝蛋白 重组表达 生物合成
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