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An Efficient Plant Regeneration System of Hydrangea bretschneideri Dipp via Stem Segments as Explants 认领 引用 被引量：3
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作者 Si ran Wang Jia Yan +1 位作者 Bu er Ha Yu’e Bai 《Phyton-International Journal of Experimental Botany》 SCIE 2021年第2期595-604,共10页
Hydrangea bretschneideri Dipp is a highly popular ornamental plant for garden decoration.Genetic engineering technology has been successfully used in many plant species,but it is limited in Hydrangea.Here we establish... Hydrangea bretschneideri Dipp is a highly popular ornamental plant for garden decoration.Genetic engineering technology has been successfully used in many plant species,but it is limited in Hydrangea.Here we established an efficient regeneration system by using stem segments as explants for the first time.In our study,the plant growth regulators(PGRs)were evaluated at the different regeneration processes,including axillary shoots regeneration and root induction.We found that the optimal concentration for axillary buds’induction was 2.0 mgL-16-BA and 0.5 mgL-11 IAA,its highest induction rate was 70%.Moreover,the highest axillary shoots proliferation coefficient was 10.7 on the Murashige and Skoog(MS)medium with 2.0 mgL-16-benzyladenine(BA),0.2 mgL-1indole-3-butyric acid(IBA),and 1.0 mgL-1gibberellin A3(GA3).The highest frequency of root induction was 80.0±0.06%by culturing the elongated shoots in 1/2 MS medium containing 0.1 mgL-1IBA.In summary,our study will provide an effective technology for large-scale propagation and important pathway for promoting the popularization and application of Hydrangea bretschneideri Dipp. 展开更多
关键词 Hydrangea bretschneideri Dipp stem segments regeneration
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DIPP—An LLC Replacement Policy for On-chip Dynamic Heterogeneous Multi-core Architecture 认领 引用
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作者 Zhang Yang Xing Zuocheng Ma Xiao 《国际计算机前沿大会会议论文集》 EI 2015年第1期112-113,共2页
As the big data era is coming, it brings new challenges to the massive data processing. A combination of GPU and CPU on chip is the trend to release the pressure of large scale computing. We found that there are diffe... As the big data era is coming, it brings new challenges to the massive data processing. A combination of GPU and CPU on chip is the trend to release the pressure of large scale computing. We found that there are different memory access characteristics between GPU and CPU. The most important one is that the programs of GPU include a large number of threads, which lead to higher access frequency in cache than the CPU programs. Although the LRU policy favors the programs with high memory access frequency, the programs of GPU can’t get the corresponding performance boost even more cache resources are provided. So LRU policy is not suitable for heterogeneous multi-core processor. Based on the different characteristics of GPU and CPU programs on memory access, this paper proposes an LLC dynamic replacement policy--DIPP (Dynamic Insertion / Promotion Policy) for heterogeneous multi-core processors.The core idea of the replacement policy is to reduce the miss rate of the program and enhance the overall system performance by limiting the cache resources that GPU can acquire and reducing the thread interferences between programs. Experiments compare the DIPP replacement policy with LRU and we conduct a classified discussion according to the program results of GPU. Friendly programs enhance 23.29% on the average performance (using arithmetic mean).Large working sets programs can improve 13.95%, compute-intensive programs enhance 9.66% and stream class programs improve 3.8%. 展开更多
关键词 Big data Heterogeneous Multicore Replacement Policy DIPP.
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Somaclonal variations as a mean for obtaining regenerants with different growth rates in poplar (Populus ×berolinensisDipp.) 认领 引用
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作者 Kim Z. Gamburg Viktor K. Voinikov 《Natural Science》 2013年第5期599-607,共9页
Adventive regenerants of Populus × berolinensis Dipp. were obtained on 1/2 MS salts with sucrose, vitamins, BA, TDZ and NAA using stem, petiole and leaf explants. They differed from each other in plantlet dimensi... Adventive regenerants of Populus × berolinensis Dipp. were obtained on 1/2 MS salts with sucrose, vitamins, BA, TDZ and NAA using stem, petiole and leaf explants. They differed from each other in plantlet dimensions. More than 50 clones were produced from initial regenerants by excision and rooting of apexes and lateral shoots. Differences in stem length and thickness were observed between 200 field plants produced from in vitro plantlets. Differences in stem length were conditioned mainly due to different number of internodes and not by internodes’ lengths. Plants grown from cuttings excised from highest and smallest plants retained the abilities of mother plants to grow with different rates. It is concluded that somaclonal variability can be used for selection of fast growing poplar plants which are necessary for industrial plantations. These plants can be used for this purpose without the limitations existing for transgenic plants. 展开更多
关键词 Somaclonal Variations Adventive Regenerants Poplar Populus x Berolinensis Dipp. Propagation in Vitro Fast Growing Plants
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迎春桃花茶中红开花习性观察 认领 引用 被引量：2
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作者 任敬民 文素珍 +1 位作者 汪跃华 赖荣伴 《湖北农业科学》 2015年第9期2151-2153,共3页
对迎春桃花(Prunus persica var.camelliaeflora Dipp.)茶中红开花习性进行了观察,结果表明,茶中红花芽形态分化划分为未分化期、花芽分化始期、萼片分化期、花瓣分化期、雄蕊分化期和雌蕊分化期等6个时期。茶中红花为辐射对称花,颜色... 对迎春桃花(Prunus persica var.camelliaeflora Dipp.)茶中红开花习性进行了观察,结果表明,茶中红花芽形态分化划分为未分化期、花芽分化始期、萼片分化期、花瓣分化期、雄蕊分化期和雌蕊分化期等6个时期。茶中红花为辐射对称花,颜色为亮红色。茶中红开花习性存在一些特殊性,有一定比例的单芽双花花序现象和一花多果现象。 展开更多
关键词 迎春桃花(Prunus persica var.camelliaeflora Dipp.) 花芽分化 花序 开花习性 冰冻切片
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一种聚磷酸酯合成新方法的研究 认领 引用 被引量：2
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作者 胡斌 卓仁禧 范昌烈 《武汉大学学报（自然科学版）》 1997年第2期159-162,共4页
研究了双酚A（BPA）与1，1－二咪唑磷酸苯酚酯（DIPP）的溶液缩聚．与BPA和二氯磷酸苯酚酯（DCPP）的缩聚反应相比，聚合反应速度和产物的分子量明显提高．
关键词 聚磷酸酯 溶液缩聚 合成 双酚 DIPP
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2,6-二异丙基苯酚的合成研究 认领 引用 被引量：1
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作者 罗明耀 蔡守信 《浙江工学院学报》 1990年第1期17-23,共7页
苯酚和丙烯在压力釜内,以酚铝为催化剂进行邻烷基化反应,制得2,6-二异丙基苯酚。 本文根据实验数据,详细地讨论了影响该反应的主要因素,进而寻求出最优惠的工艺条件。在此基础上进行了稳定试验,并且获得较为理想的结果。 此外,又提出副... 苯酚和丙烯在压力釜内,以酚铝为催化剂进行邻烷基化反应,制得2,6-二异丙基苯酚。 本文根据实验数据,详细地讨论了影响该反应的主要因素,进而寻求出最优惠的工艺条件。在此基础上进行了稳定试验,并且获得较为理想的结果。 此外,又提出副产物的利用和三废治理途径。 展开更多
关键词 DIPP 有机合成 烷基化 酚盐 催化剂
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日立推出第二代等离子显示器 认领 引用
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作者 钟甸 《广播电视信息》 2003年第8期69-69,共1页
关键词 日立公司 等离子显示器 ALIS显示 DIPP数码成像 HD—READY42 PMA400C
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都山绣球试管苗促根试验研究 认领 引用
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作者 池景存 黄守印 《安徽农业科学》 CAS 北大核心 2009年第19期9291-9292,共2页
[目的]提高都山绣球试管苗的生根率,加快其在园林生产上的应用。[方法]以都山绣球试管无菌苗为试验材料,接入附加不同种类和浓度生长素的1/2MS培养基中进行离体促根培养。[结果]都山绣球试管无根苗在1/2MS+IBA 0.25 mg/L+NAA 0.25 mg/L+... [目的]提高都山绣球试管苗的生根率,加快其在园林生产上的应用。[方法]以都山绣球试管无菌苗为试验材料,接入附加不同种类和浓度生长素的1/2MS培养基中进行离体促根培养。[结果]都山绣球试管无根苗在1/2MS+IBA 0.25 mg/L+NAA 0.25 mg/L+1.50%蔗糖+0.75%琼脂的培养基中生根最好,生根率达94.7%,并且生根多、健壮,有利于移栽成活。[结论]不同种类和浓度的生长素对都山锈球试管苗的生根数量和根的质量有较大的影响。 展开更多
关键词 都山绣球 试管苗 培养基 促根
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