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112篇 您的检索式:作者名="Yanan Jiang"
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1The Genome of Artemisia annua Provides Insight into the Evolution of Asteraceae Family and Artemisinin Biosynthesis显示文摘Artemisia annua,通常已知的同样香甜的苦恼或 Qinghao,是到中国的一个灌木土著人并且长被用于药用的目的。A。annua 现在作为有势力抗疟药混合物的唯一的生来的来源全球性被栽培, artemisinin。这里,我们报导 A 的 1.74-gigabase 染色体的一个高质量的草稿集会。annua,高度异质接合,富于重复定序,并且包含 63 ? 226 编码蛋白质的基因,在定序的植物种类之中的最大的数字之一。我们发现了那,作为在 Asteraceae 的一些定序的染色体之一, A。annua 染色体包含对这大被子植物 clade 特定的很多基因。尤其是,扩大和编码涉及萜烯生合成的酶的基因的功能的多样化与 artemisinin biosynthetic 小径的进化一致。我们进一步由介绍那 A 的 transcriptome 揭示了。annua 发展了复杂 transcriptional 规章的网络位于 \O 下面 artemisinin 生合成。把转基因的 A 基于我们产生了的全面 genomic 和 transcriptomic 分析。artemisinin 高级的生产的 annua 线,它现在为大规模生产准备好了并且将从而帮助遇见增加 artemisinin 的全球需求的挑战。Qian Shen Lida Zhang Zhihua Liao Shengyue Wang Tingxiang Yan Pu Shi Meng Liu Xueqing Fu Qifang Pan Yuliang Wang Zongyou Lv Xu Lu Fangyuan Zhang Weimin Jiang Yanan Ma Minghui Chen Xiaolong Hao Ling Li Yueli Tang Gang Lv Yan Zhou Xiaofen Sun Peter E. Brodelius Jocelyn K.C. Rose Kexuan Tang 2018Molecular Plant2018,11,6:47
2Acute cerebrovascular disease following COVID-19: a single center, retrospective, observational study显示文摘Background and purpose COVID-19 is an infectious disease caused by Severe Acute Respiratory Syndrome Coronavirus 2(SARS-CoV-2).Apart from respiratory complications,acute cerebrovascular disease(CVD)has been observed in some patients with COVID-19.Therefore,we described the clinical characteristics,laboratory features,treatment and outcomes of CVD complicating SARS-CoV-2 infection.Materials and methods Demographic and clinical characteristics,laboratory findings,treatments and clinical outcomes were collected and analysed.Clinical characteristics and laboratory findings of patients with COVID-19 with or without new-onset CVD were compared.Results Of 219 patients with COVID-19,10(4.6%)developed acute ischaemic stroke and 1(0.5%)had intracerebral haemorrhage.COVID-19 with new onset of CVD were significantly older(75.7±10.8 years vs 52.1±15.3 years,p<0.001),more likely to present with severe COVID-19(81.8%vs 39.9%,p<0.01)and were more likely to have cardiovascular risk factors,including hypertension,diabetes and medical history of CVD(all p<0.05).In addition,they were more likely to have increased inflammatory response and hypercoagulable state as reflected in C reactive protein(51.1(1.3-127.9)vs 12.1(0.1-212.0)mg/L,p<0.05)and D-dimer(6.9(0.3-20.0)vs 0.5(0.1-20.0)mg/L,p<0.001).Of 10 patients with ischemic stroke;6 received antiplatelet treatment with aspirin or clopidogrel;and 3 of them died.The other four patients received anticoagulant treatment with enoxaparin and 2 of them died.As of 24 March 2020,six patients with CVD died(54.5%).Conclusion Acute CVD is not uncommon in COVID-19.Our findings suggest that older patients with risk factors are more likely to develop CVD.The development of CVD is an important negative prognostic factor which requires further study to identify optimal management strategy to combat the COVID-19 outbreak.Yanan Li Man Li Mengdie Wang Yifan Zhou Jiang Chang Ying Xian David Wang Ling Mao Huijuan Jin Bo Hu 2020Stroke & Vascular Neurology2020,5,3:22
34-Hydroxybenzyl-substituted amino acid derivatives from Gastrodia elata显示文摘Seven new 4-hydroxybenzyl-substituted amino acid derivatives(1-7), together with 11 known compounds, were isolated from an aqueous extract of the rhizomes of Gastrodia elata Blume.Their structures were determined by spectroscopic and chemical methods. Compounds 1-3 are pyroglutamate derivatives containing 4-hydroxybenzyl units at the N atom and 4-7 are the first examples of natural products with the 4-hydroxybenzyl unit linked via a thioether bond to 2-hydroxy-3-mercaptopropanoic acid(4-6) and 2-hydroxy-4-mercaptobutanoic acid(7), which would be biogenetically derived from cysteine and homocysteine, respectively. The structures of 1 and 2 were verified by synthesis, while the absolute configurations of 4, 5 and 7 were assigned using Mosher's method based on the MPA determination rule of ΔδRS values. The known compound 4-(hydroxymethyl)-5-nitrobenzene-1,2-diol(8) exhibited activity against Fe^(2+)-cysteine induced rat liver microsomal lipid peroxidation with IC_(50) values of 9.99×10^(-6) mol/L.Qinglan Guo Yanan Wang Sheng Lin Chenggen Zhu Minghua Chen Zhibo Jiang Chengbo Xu Dan Zhang Huailing Wei Jiangong Shi 2015Acta Pharmaceutica Sinica B2015,5,4:18
4A novel quantified bitterness evaluation model for traditional Chinese herbs based on an animal ethology principle显示文摘Traditional Chinese herbs(TCH) are currently gaining attention in disease prevention and health care plans. However, their general bitter taste hinders their use. Despite the development of a variety of taste evaluation methods, it is still a major challenge to establish a quantitative detection technique that is objective, authentic and sensitive. Based on the two-bottle preference test(TBP), we proposed a novel quantitative strategy using a standardized animal test and a unified quantitative benchmark. To reduce the difference of results, the methodology of TBP was optimized. The relationship between the concentration of quinine and animal preference index(PI) was obtained. Then the PI of TCH was measured through TBP, and bitterness results were converted into a unified numerical system using the relationship of concentration and PI. To verify the authenticity and sensitivity of quantified results,human sensory testing and electronic tongue testing were applied. The quantified results showed a good discrimination ability. For example, the bitterness of Coptidis Rhizoma was equal to 0.0579 mg/mL quinine, and Nelumbinis Folium was equal to 0.0001 mg/mL. The validation results proved that the newassessment method for TCH was objective and reliable. In conclusion, this study provides an option for the quantification of bitterness and the evaluation of taste masking effects.Xue Han Hong Jiang Li Han Xi Xiong Yanan He Chaomei Fu Runchun Xu Dingkun Zhang Junzhi Lin Ming Yang 2018Acta Pharmaceutica Sinica B2018,8,2:17
5The Coix Genome Provides Insights into Panicoideae Evolution and Papery Hull Domestication显示文摘Coix is a grass crop domesticated as early as the Neolithic era.It is still widely cultivated for both highly nutritional food and medicinal use.However,the genetic study and breeding of this crop are hindered by the lack of a sequenced genome.Here,we report de novo sequencing and assembly of the 1619-Mb genome of Coix,and annotation of 75.39%repeats and 39629 protein-coding genes.Comparative genomics analysis showed that Coix is more closely related to sorghum than maize,but intriguingly only Coix and maize had a recent genome duplication event,which was not detected in sorghum.We further constructed a genetic map and mapped several important traits,especially the strength of hull.Selection of papery hull(thin:easy dehulling)from the stony hull(thick:difficult dehulling)in wild progenitors was a key step in Coix domestication.The papery hull makes seed easier to process and germinate.Anatomic and global transcriptome analysis revealed that the papery hull is a result of inhibition of cell division and wall biogenesis.We also successfully demonstrated that seed hull pressure resistance is controlled by two major quantitative trait loci(QTLs),which are associated with hull thickness and color,respectively.The two QTLs were further fine mapped within intervals of 250 kb and 146 kb,respectively.These resources provide a platform for evolutionary studies and will facilitate molecular breeding of this important crop.Chao Guo Yanan Wang Aiguo Yang Jun He Chaowen Xiao Shanhua Lv Fengming Han Yibing Yuan Yuan Yuan Xiaolong Dong Juan Guo YawenYang-Hailan Liu Ningzhi Zuo Yaxi Hu Kangxu Zhao Zhengbo Jiang Xing Wang Tingting Jiang Yaou Sherf Moju Cao Yuan Wang Zhaobo Long Tingzhao Rong Luqi Huang Shufeng Zhou 2020Molecular Plant2020,13,2:11
6Curcumin potentiates the antitumor effects of 5-FU in treatment of esophageal squamous carcinoma cells through downregulating the activation of NF-κB signaling pathway in vitro and in vivo显示文摘尽管表明小径的原子 factor-kappaB (NF-B ) 的组成的激活在多重不同人的肿瘤被报导了,在食道的有鳞的房间癌(ESCC ) 的 NF-B 小径的角色留下不清楚。丰富的来源提供了有趣的卓见进化疗和 chemopreventive 在癌症上完成的 curcumin 可以由调停的多重机制。在这研究,我们首先在二 ESCC 房间线 Eca109 和 EC9706 分析了 NF-B 小径的地位,然后进一步调查了 curcumin 是否能独自或在有 5 氟尿嘧啶(5-FU ) 的联合在 vitro 并且在 vivo 调制 NF-B 小径。结果证明 NF-B 发信号小径组成地在 ESCC 房间线被激活。Curcumin 经由 IB phosphorylation,和 downregulated 的抑制压制了 NF-B 的激活在 ESCC 房间线的 Bcl-2 和 CyclinD1 的表情。与 5-FU 相结合的 Curcumin 比独自对待的 5-FU 导致了更低的房间生存能力和更高的 apoptosis。在一个人的 ESCC 异种皮移植模型, curcumin 或 5-FU 独自减少了肿瘤体积,但是他们的联合有最强壮的 anticancer 效果。而且, curcumin 能也禁止在 vivo 通过 IB phosphorylation 和房间 apoptosis 的正式就职的 downregulation 表明小径的 NF-B。总的来说,我们的结果显示组成地激活的 NF-B 发信号小径在二个 ESCC 房间存在, curcumin 的 chemopreventive 效果与表明小径和它的下游的基因的 NF-B 的 downregulation 被联系。Fang Tian Tianli Fan Yan Zhang Yanan Jiang Xiaoyan Zhang 2012Acta Biochimica et Biophysica Sinica2012,44,10:10
7A New Species of the Genus Xenophrys(Amphibia: Anura: Megophryidae) from Libo County, Guizhou, China显示文摘A new species of the genus Xenophrys is described from a karst cave environment of Libo County, Guizhou Province, Southern China. The new species, Xenophrys liboensis sp. nov., is distinguished from its congeners by a combination of the following characters: 1) tympanum distinct; 2) vomerine teeth present; 3) the length of lower arm and hand larger than the half of snout-vent; 4) heels overlapped slightly when the flexed legs are held at right angles to the body axis; 5) toe tips with rudimentary webs and without grooves; 6) dermal fringes moderate; 7) tubercles on the dorsum forming an X-shaped weak ridge; 8) horn-like tubercle at the edge of the upper eyelid distinct; 9) color of the iris in life is brown. In Bayesian phylogenetic analysis of 22 species of Xenophrys, all the individuals of X. liboensis sp. nov. clustered into a monophyletic clade with high posterior probabilities. In addition, the ranges of genetic divergences of X. liboensis sp. nov. with other species were interspecific rather than intraspecific. Based on the above evidences, we consider that X. liboensis sp. nov. is a valid species in Xenophrys.Yanan ZHANG Gang LI Ning XIAO Jiaqi LI Tao PAN Hui WANG Baowei ZHANG Jiang ZHOU 2017Asian Herpetological Research2017,18,2:9
8Nine compounds from the root bark of Lycium chinense and their anti-inflammatory activities显示文摘Two new compounds, named lyciumlignan D(1) and lyciumphenyl propanoid A(2), along with seven known compounds, were isolated from the root bark of Lycium chinense. Their structures were elucidated using spectroscopic data(UV, IR, HR-ESI-MS, 1D and 2D NMR, CD), as well as by comparison with those of the literature. Compounds 3–9 were isolated from this genus for the first time. In the in vitro assay, compounds 3, 6, and 7 exhibited stronger anti-inflammatory effects than the positive control curcumin at a concentration of 10 μmol/L.Yanan Yang Yawen An Wei Wang Ning Du Jinghua Zhang Ziming Feng Jianshuang Jiang Peicheng Zhang 2017Acta Pharmaceutica Sinica B2017,7,4:9
9Nucleocytoplasmic Trafficking of the Arabidopsis WD40 Repeat Protein XIW1 Regulates ABI5 Stability and Abscisic Acid Responses显示文摘WD40 repeat-containing proteins(WD40 proteins)serve as versatile scaffolds for protein-protein interac-tions,modulating a variety of cellular processes such as plant stress and hormone responses.Here we report the identification of a WD40 protein,XIW1(for XPO1-interacting WD40 protein 1),which positively regulates the abscisic acid(ABA)response in Arabidopsis.XIW1 is located in the cytoplasm and nucleus.We found that it interacts with the nuclear transport receptor XPO1 and is exported by XPO1 from the nucleus.Mutation of XIW1 reduces the induction of ABA-responsive genes and the accumulation of ABA Insensitive 5(ABI5),causing mutant plants with ABA-insensitive phenotypes during seed germination and seedling growth,and decreased drought stress resistance.ABA treatment upregulates the expression of XIW1,and both ABA and abiotic stresses promote XIW1 accumulation in the nucleus,where it interacts with ABI5.Loss of XIW1 function results in rapid proteasomal degradation of ABI5.Taken together,these findings suggest that XIW1 is a nucleocytoplasmic shuttling protein and plays a positive role in ABA responses by interacting with and maintaining the stability of ABI5 in the nucleus.Xuezhong XU Wang Wan Guobin Jiang Yue Xi Haijian Huang Jiajia Cai Yanan Chang Cheng-Guo Duan Satendra KMangrauthia Xinxiang Peng Jian-Kang Zhu Guohui Zhu 2019Molecular Plant2019,12,12:8
10Precise measurement technique for the stable acoustic cavitation bubble显示文摘Based on the periodic oscillation of the stable acoustic cavitation bubble, we present a precise measure-ment technique for the bubble evolution. This technique comprises the lighting engineering of pulsing laser beam whose phase can be digitally shifted, and the long distance microphotographics. We used a laser, an acousto-optic modulator, a pulse generator, and a long distance microscope. The evolution of a levitated bubble can be directly shown by a series of bubble’s images at different phases. Numerical simulation in the framework of the Rayleigh-Plesset bubble dynamics well supported the experimental result, and the ambient radius of the bubble, an important parameter re-lated to the mass of the gas inside the bubble, was obtained at the same time.HUANG Wei CHEN Weizhong LIU Yanan GAO Xianxian JIANG Li'an XU Junfeng ZHU Yifei 2005Chinese Science Bulletin2005,50,21:8
11Efficacy of Lubeikangru formulation in mice with hyperplasia of the mammary glands induced by estrogen and progesterone显示文摘OBJECTIVE: To evaluate the protective effects of Lubeikangru formula(LF) on hyperplasia of the mammary glands(HMG) induced by estrogen and progesterone in mice.METHODS: Female mice were divided randomly into five groups: normal, model, tamoxifen(3 mg/kg),Rupixiao(900 mg/kg) and LF(900 mg/kg). All mice except those in the normal group were treated sequentially with estradiol and progesterone to induce HMG. From the tenth day of induction, mice in normal and model groups received distilled water and mice in the other groups were given the corresponding drugs by gavage, once a day, for 30 d.At the end of treatment, the mammary glands, ovaries, hypothalamus, and serum was collected for whole-mount and hematoxylin and eosin(HE)staining, enzyme-linked immunosorbent assays(ELISAs), or western blotting.RESULTS: Whole-mount and HE staining of mammary glands showed that LF rescued(at least in part) the hyperplasic morphology of the mammary glands, and the number of branch points decreased after LF treatment(P < 0.05). ELISAs revealed that levels of estrogen and progesterone were decreased following LF treatment, whereas levels of gonadotropin-releasing hormone, follicle-stimulating hormone, and luteinizing hormone were increased in serum and tissues. Western blotting confirmed that LF treatment led to a reduction in expression of phosphorylated(p)-Erk, p-p38 and p-c-Jun N-terminal kinase. LF was also confirmed to be safe by acute-toxicity tests.CONCLUSION: LF can protect the mammary glands of mice from estrogen-and progesterone-induced hyperplasia by adjusting hormone levels and regulating the mitogen-activated protein kinase pathway.Sun Li Guo Donghui Liu Qian Xue Yanan Jiang Ning Zheng Hongxin 2019Journal of Traditional Chinese Medicine2019,39,2:8
12A critical review on the chemical wear and wear suppression of diamond tools in diamond cutting of ferrous metals显示文摘Diamond tools play a critical role in ultra-precision machining due to their excellent physical and mechanical material properties,such as that cutting edge can be sharpened to nanoscale accuracy.However,abrasive chemical reactions between diamond and non-diamond-machinable metal elements,including Fe,Cr,Ti,Ni,etc,can cause excessive tool wear in diamond cutting of such metals and most of their alloys.This paper reviews the latest achievements in the chemical wear and wear suppression methods for diamond tools in cutting of ferrous metals.The focus will be on the wear mechanism of diamond tools,and the typical wear reduction methods for diamond cutting of ferrous metals,including ultrasonic vibration cutting,cryogenic cutting,surface nitridation and plasma assisted cutting,etc.Relevant commercially available devices are introduced as well.Furthermore,future research trends in diamond tool wear suppression are discussed and examined.Guo Jiang Zhang Jianguo Pan Yanan Kang Renke Namba Yoshiharu Shore Paul Yue Xiaobin Wang Baorui Guo Dongming 2020International Journal of Extreme Manufacturing2020,2,1:7
13Novel hydrogen storage properties of palladium nanocrystals activated by a pentagonal cyclic twinned structure显示文摘研究人员们看起来忽视了雏晶的一种特殊形式,五角的周期的 twinning,明显的二维的格子扩大在存在导致新奇 physicalchemical 性质在几何、电子的结构与变化联系了。在 Pd nanocrystals 把氢的存储和版本用作一根探针,我们发现了五角的周期的孪生的 Pd nanocrystals 有的那 icosahedral 不同的氢存储性质由于二维的格子扩大,与那些相当不同八面的单个水晶的对应物。另外,在五角的周期的孪生的 Pd nanocrystals 的二维的格子扩大在电子结构引起一个变化,它导致在 PdH x 五角的周期的孪生的 nanocrystals。Huang Huang Shixiong Bao Qiaoli Chen Yanan Yang Zhiyuan Jiang Qin Kuang Xiaoyin Wu Zhaoxiong Xie Lansun Zheng 2015Nano Research2015,8,8:7
14A facile surfactant-free synthesis of Rh flower-like nanostructures constructed from ultrathin nanosheets and their enhanced catalytic properties显示文摘Rh 是广泛地在许多器官的反应被使用的重要催化剂。在最近的年里,许多努力集中了于由与控制尺寸和形态学制作催化剂 nanoparticles 改进它的催化效率。然而,也把有机化合物用作反应媒介或盖住代理人的经常采用的合成线路经常在催化剂表面上导致剩余分子,它急速地接着减少催化表演。此处,我们报导甲醛经由 Rh (acac )3 的热水的减小获得的新奇 Rh 象花的结构的灵巧的、水的、没有表面活化剂的合成。唯一的 Rh nanoflowers 从 ultrathin nanosheets 被构造,其基础表面包括了 { 111 } 有 ~ 的平均厚度的方面 1.1 nm。特定的表面区域由公司脱衣测量了 79.3 是 m 2 钟声到 134.4 食火鸟的浸透的磁化 ???? 愠汬祯湩吗??Yaqi Jiang Jingyun Su Yanan Yang Yanyan Jia Qiaoli Chen Zhaoxiong Xie Lansun Zheng 2016Nano Research2016,9,3:7
15Design and Implementation of Initial Cell Search in 5G NR Systems显示文摘The initial cell search plays an important role during the process of downlink synchronization establishment between the User Equipment(UE) and the base station. In particular, the uncertainty of the synchronization signals on the frequency domain and the flexibility of frame structure configuration have brought great challenges to the initial cell search for the fifth-generation(5G) new radio(NR). To solve this problem, firstly, we analyze the physical layer frame structure of 5G NR systems. Then, by focusing on the knowledge of synchronization signals, the 5G NR cell search process is designed, and the primary synchronization signal(PSS) timing synchronization algorithm is proposed, including a 5G-based coarse synchronization algorithm and conjugate symmetry-based fine synchronization algorithm. Finally, the performance of the proposed cell search algorithm in 5G NR systems is verified through the combination of Digital Signal Processing(DSP) and personal computer(PC). And the MATLAB simulation proves that the proposed algorithm has better performance than the conventional cross-correlation algorithm when a certain frequency offset exists.Fatang Chen Xiu Li Yun Zhang Yanan Jiang 2020China Communications2020,17,5:7
16Characterization of the soybean Gm ALMT family genes and the function of Gm ALMT5 in response to phosphate starvation显示文摘A potential mechanism to enhance utilization of sparingly soluble forms of phosphorus(P) is the root secretion of malate, which is mainly mediated by the ALMT gene family in plants. In this study, a total of 34 Gm ALMT genes were identified in the soybean genome. Expression patterns diverged considerably among Gm ALMTs in response to phosphate(Pi) starvation in leaves, roots and flowers, with expression altered by P availability in 26 of the 34 Gm ALMTs. One root-specific Gm ALMT whose expression was significantly enhanced by Pi-starvation,Gm ALMT_5, was studied in more detail to determine its possible role in soybean P nutrition. Analysis of Gm ALMT_5 tissue expression patterns, subcellular localization, and malate exudation from transgenic soybean hairy rootsoverexpressing Gm ALMT_5, demonstrated that Gm ALMT_5 is a plasma membrane protein that mediates malate efflux from roots. Furthermore, both growth and P content of transgenic Arabidopsis overexpressing Gm ALMT_5 were significantly increased when sparingly soluble Ca-P was used as the external P source. Taken together, these results indicate that members of the soybean Gm ALMT gene family exhibit diverse responses to Pi starvation. One member of this family, Gm ALMT_5, might contribute to soybean P efficiency by enhancing utilization of sparingly soluble P sources under P limited conditions.Wenting Peng Weiwei Wu Junchu Peng Jiaojiao Li Yan Lin Yanan Wang Jiang Tian Lili Sun Cuiyue Liang Hong Liao 2018Journal of Integrative Plant Biology2018,60,3:7
17A New Species of the Genus Rhacophorus (Anura: Rhacophoridae) from Dabie Mountains in East China显示文摘A new species of rhacophorid of the genus Rhacophorus is described from the Dabie Mountains of west Anhui,east China.The new species,Rhacophorus zhoukaiyae sp.nov.is distinguished from its congeners by a combination of the following characters: 1) the ventral surface and front-and-rear of the femur is paler yellowish and decorated with irregular grayish blotching,and without obvious spots on the dorsum of the hand and foot webbing; 2) the outer metatarsal tubercle is small; 3) outer fingers are half-webbed and outer toes two third webbed; 4) the skin on the dorsum is smooth and without compressed warts; 5) the throat,chest and belly are pure paler yellowish; 6) the dorsal part of the fingers and toes are grayish-white; 7) the iris is golden-yellow.In addition,the phylogenetic tree showed that all the individuals of R.zhoukaiyae sp.nov.clustered into one distinct clade which suggested the validity of this species.This results could also be used to the support of species delimitation.Currently,this species is known only from mid-elevation montane evergreen forest in the Dabie Mountains of west Anhui,China.Tao PAN Yanan ZHANG Hui WANG Jun WU Xing KANG Lifu QIAN Kai LI Yu ZHANG Jinyun CHEN Dingqi RAO Jianping JIANG Baowei ZHANG 2017Asian Herpetological Research2017,18,1:5
18Study on the Technology of Ni-P Electroless Plating on the Mg Alloy显示文摘Base on the analysis for the corrosion mechanism of the Mg alloys,the technology of Ni-P directly electroless plating on the Mg-10Li-1Zn alloys was studied.The effects of the pre-treatment on the morphologies of substrate and plating films were investigated,The result shows that Ni-P electroless plating could be divided two steps:the induction period and the rapid deposition period.The Ni-P film is amorphous structure:A excellent Ni-P coating can be obtained under the optimal parameter.The Ni-P coating can obviously improve the corrosion resistance of Mg alloy in variety environment.Liu Yihan Sun Huawei Jiang Yanan 2012稀有金属材料与工程2012,41,S1:5
19Regulation of flowering time in chrysanthemum by the R2R3 MYB transcription factor CmMYB2 is associated with changes in gibberellin metabolism显示文摘The switch from vegetative growth to reproductive growth is a key event in the development of a plant.Here,the product of the chrysanthemum gene CmMYB2,an R2R3 MYB transcription factor that is localized in the nucleus,was shown to be a component of the switching mechanism.Plants engineered to overexpress CmMYB2 flowered earlier than did wild-type plants,while those in which CmMYB2 was suppressed flowered later.In both the overexpression and RNAi knockdown plants,a number of genes encoding proteins involved in gibberellin synthesis or signaling,as well as in the response to photoperiod,were transcribed at a level that differed from that in the wild type.Both yeast two-hybrid and bimolecular fluorescence complementation assays revealed that CmMYB2 interacts with CmBBX24,a zinc-finger transcription factor known to regulate flowering by its influence on gibberellin synthesis.Lu Zhu Yunxiao Guan Yanan Liu Zhaohe Zhang Muhammad Abuzar Jaffar Aiping Song Sumei Chen Jiafu Jiang Fadi Chen 2020Horticulture Research2020,7,1:5
20Synthesis and evaluation of a protic ionic liquid as a multifunctional lubricant additive显示文摘An oil soluble multifunctional protic ionic liquid(IL)was synthesized and its tribological and antioxidant properties in poly alpha olefin(PA04)were investigated.The tribological results demonstrated that the IL significantly reduced friction and wear of PA04.The PA04 blend with IL resulted in an induced oxidation time of 555 min which is 8.2 and 3.5 times higher than that of pure PA04 and PA04 with zinc dialkyl dithiophosphate(ZDDP)for the rotating pressure vessel oxidation test.It is likely that free nonylated diphenylamine acted as a radical scavenger to enhance antioxidant performance,while free bis(2-ethylhexyl)phosphate was more prone to adsorb and react with the metal surface to form a phosphorus-rich tribofilm in order to protect the rubbing surface.Cheng JIANG Yanan WANG Huaigang SU Weimin LI Wenjing LOU Xiaobo WANG 2020Friction2020,8,3:5
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