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Thermal Reversion of Plant Phytochromes

Molecular Plant 2020年第3期13卷 386-397页

作者： Cornelia Klose ferenc Nagy Eberhard Schafer Institute of Biology II University of Freiburg79104 FreiburgGermany Institute of Plant Biology Biological Research CentreTemesvari krt.626726 SzegedHungary

Phytochromes are red/far-red reversible photoreceptors essential for plant growth and *** signaling is mediated by the physiologically active far-red-absorbing Pfr form that can be inactivated to the red-absorbing pr ground state by light-dependent photoconversion or by light-independent thermal reversion,also termed dark *** the term“dark reversion”is justified by historical reasons and frequently used in the literature,“thermal reversion”more appropriately describes the process of light-independent but temperature-regulated Pfr relaxation that not only occurs in darkness but also in light and is used throughout the *** reversion is a critical parameter for the light sensitivity of phytochrome-mediated responses and has been studied for decades,often resulting in contradictory *** reversion is an intrinsic property of the phytochrome molecules but can be modulated by intra-and intermolecular interactions,as well as biochemical modifications,such as *** this review,we outline the research history of phytochrome thermal reversion,highlighting important predictions that have been made before knowing the molecular *** further summarize and discuss recent findings about the molecular mechanisms regulating phytochrome thermal reversion and its functional roles in light and temperature sensing in plants.

关键词： phytochrome phyA phyB thermal reversion dark reversion in vivo spectroscopy

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DETERMINATION OF RADON AND NATURAL RADIOACTIVITY CONCENTRATION IN SOME BUILDING MATERIALS USED IN IZMIR,TURKEY

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Journal of Green Building 2020年第1期15卷 107-118页

作者： Daniel Hatungimana Caner Taşköprü Mutlu İçhedef Müslim Murat Saç Şemsi Yazıcı Ali Mardani-Aghabaglou Department of Civil Engineering Eng.FacultyEge UniversityBornova-IzmirTurkey Institute of Nuclear Sciences Ege UniversityBornova-IzmirTurkey Department of Civil Engineering Eng.FacultyBursa UludağUniversityNilüfer-BursaTurkey Civil Engineering Department University of Burundi2700 BujumburaBurundi

The aim of this study is to determine the radon and natural radioactivity concentra-tions of some building materials and to assess the radiation hazard associated with those mortar materials when they are used in the construction of *** measurements were realized by using LR-115 Type 2 solid state nuclear track *** activity concentrations of these materials were found to vary between 130.00±11.40 and 1604.06±40.5 Bq m^(-3).The natural radioactivity in selected mortar materials was analyzed by using scintillation gamma *** activity concentrations for 226Ra,232Th and 40K for the studied mortar materials ranged from ND to 48.5±7.0 Bq kg^(-1),ND to 41.0±6.4 Bq kg^(-1)and ND to 720.4±26.8 Bq kg^(-1),*** equivalent activities,external and internal hazard indexes,gamma and alpha indexes and absorbed gamma dose rates were calculated to assess the radiation hazard of the natural radioactivity in studied *** calculated Raeq values of all samples were found to be lower than the limit of 370 Bq kg-1 set for building *** estimated hazard index values were found to be under the unity and the absorbed dose rate values were also below the worldwide average of 84 nGy h^(-1).

关键词： Radium activity solid state nuclear track detector hazard index absorbed dose rate

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A Short Amino-Terminal Part of Arabidopsis Phytochrome A Induces Constitutive Photomorphogenic Response

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Molecular Plant 2012年第3期5卷 629-641页

作者： Andra＇s Viczia＇n E＇va Ada＇m Iris Wolf Ja＇nos Bindics Stefan Kircher Marc Heijde Roman Ulm Eberhard Scha＇fer ferenc Nagy Institute of Plant Biology Biological Research Centre of the Hungarian Academy of Sciences Temesva＇ri krt. 62. H-6726 Szeged Hungary Biologie II/Institut for Botanik University of Freiburg Freiburg Dermany Department of Botany and Plant Biology University of Geneva Geneva Switzerland Centre for Biological Signalling Studies （BIOSS） University of Freiburg Freiburg Germany School of Biological Sciences University of Edinburgh Edinburgh UK

Phytochrome A （phyA） is the dominant photoreceptor of far-red light sensing in Arabidopsis thaliana, phyA accumulates at high levels in the cytoplasm of etiolated seedlings, and light-induced phyA signaling is mediated by a com- plex regulatory network. This includes light- and FHY1/FHL protein-dependent translocation of native phyA into the nucleus in vivo. It has also been shown that a short N-terminal fragment of phyA （PHYA406） is sufficient to phenocopy this highly regulated cellular process in vitro. To test the biological activity of this N-terminal fragment of phyA in planta, we produced transgenic phyA-201 plants expressing the PHYA406-YFP （YELLOW FLUORESCENT prOTEIN）-DD, PHYA406- YFP-DD-NLS （nuclear localization signal）, and PHYA406-YFP-DD-NES （nuclear export signal） fusion proteins. Here, we report that PHYA406-YFP-DD is imported into the nucleus and this process is partially light-dependent whereas PHYA406-YFP-DD-NLS and PHYA406-YFP-DD-NES display the expected constitutive localization patterns. Our results show that these truncated phyA proteins are light-stable, they trigger a constitutive photomorphogenic-like response when localized in the nuclei, and neither of them induces proper phyA signaling. We demonstrate that in vitro and in vivo PHYA406 Pfr and pr bind COP1, a general repressor of photomorphogenesis, and co-localize with it in nuclear bodies. Thus, we conclude that, in planta, the truncated PHYA406 proteins inactivate COP1 in the nuclei in a light-independent fashion.

关键词： Arabidopsis cop phenotype phytochrome A COP1

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Effect of dietary carbohydrate level on growth performance,body composition and selected physiology parameters of juvenile cobia(Rachycentron canadum)

Effect of dietary carbohydrate level on growth performance,b...

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The 14th International Symposium on Fish Nutrition & Feeding

作者： Mingchun Ren~*,Qinghui Ai,Kangsen Mai,Wei Xu,Wenbing Zhang,Xiaojie Wang, Zhiguo Liufu The Key Laboratory of Mariculrure(Ministry Education of China),Ocean University of China, Qingdao 266003,pr China

A 9-week feeding trial was conducted to investigate the effect of dietary carbohydrate level on the growth performance,body composition and selected physiology parameters of juvenile cobia(3.38±0.04g) in indoor flow-through and aerated *** isonitrogenous and isolipidic diets containing graded levels of gelatinized cornstarch(2.5%,6.5%,12.5%,18.4%,24.2%and 30.4%) of dry weight) were fed to juvenile *** growth rate(SGR) and feed efficiency ratio(fer) both increased with increasing dietary starch level till up to 18.4%) diet(Pfer remained nearly the *** digestibility coefficient of starch reduced significantly when dietary gelatinized cornstarch up to 30.4%) compared with lower starch *** fed the diets with starch from 18.4%to 30.4%showed higher amylase activities in intestinal tract than those fed diets containing starch 2.5%and 6.5%(Pprotease activity in both liver and intestinal tract showed no significant difference(P>0.05) among dietary *** higher whole-body lipid contents were observed in fish fed the diets containing higher ***-body moisture content was inversely correlated with the whole-body lipid content,while protein and ash showed no significant *** glucose, hepatosomatic index(HSI),liver glycogen and liver lipid increased with increasing dietary starch (Pfer,the appropriate dietary starch supplementations of juvenile cobia were estimated to be 20.9%of diet and 17.2%of diet,respectively.

关键词： Carbohydrates utilization Gelatinized starch Cobia Growth performance Feeding and nutrition

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索拉非尼治疗晚期原发性肝癌18例疗效及不良反应分析

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实用临床医药杂志 2011年第23期15卷 83-84页

作者：崔勇霞罗执芬周建炜周云河南省人民医院肿瘤内科河南郑州450003

目的评价索拉非尼治疗晚期肝细胞性肝癌的疗效及安全性。方法总结2009年10月--2011年6月本科应用索拉非尼治疗的18例晚期原发性肝癌患者的临床资料。观察其临床疗效、平均病情进展时间、6个月及1年生存率、生存质量和不良反应。结果服药... 详细信息

目的评价索拉非尼治疗晚期肝细胞性肝癌的疗效及安全性。方法总结2009年10月--2011年6月本科应用索拉非尼治疗的18例晚期原发性肝癌患者的临床资料。观察其临床疗效、平均病情进展时间、6个月及1年生存率、生存质量和不良反应。结果服药8周后，18例患者均为稳定（100．00％）；服药后16周后，1例患者腹水消失，为部分缓解（5．56％），13例为稳定（72．22％），4例为进展（22．22％）。平均服用索拉非尼时间11．9月，平均病情进展时间5．8个月。6个月生存率94．44％（17／18），1年生存率50．00％（9／18）。生存质量改善6例（33．33％），稳定8例（44．44％），下降4例（22．22％）。大多数患者为1～2级毒副反应。结论索拉非尼可提高晚期肝细胞性肝癌患者的6个月及1年生存率，且耐受性良好。

关键词：索拉非尼晚期原发性肝癌毒副反应

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丁烯异构化催化剂进展

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石油化工 2002年第4期31卷 311-315页

作者：汪哲明阎子峰石油大学重质油加工国家重点实验室CNPC催化重点实验室大连化学物理研究所催化基础国家重点实验室辽宁大连116023

回顾了丁烯骨架异构化反应的热力学、催化剂的活性中心以及异构化催化剂的研究进展。热力学研究显示 ,异构化反应在低温下运行比较有利 ;活性中心的研究显示 ,中强B酸中心为异构化反应的活性位 ,强的B酸中心易诱发二聚、裂解等副反应 ,... 详细信息

回顾了丁烯骨架异构化反应的热力学、催化剂的活性中心以及异构化催化剂的研究进展。热力学研究显示 ,异构化反应在低温下运行比较有利 ;活性中心的研究显示 ,中强B酸中心为异构化反应的活性位 ,强的B酸中心易诱发二聚、裂解等副反应 ,酸度和孔结构的调节相结合才能实现丁烯的选择性异构 ;催化剂异构化性能对比显示 ,fer、SAPO -11等 10元环分子筛是目前最有发展潜力的异构化催化剂。

关键词：丁烯异构化催化剂进展择形催化酸性位

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