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  • 1
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    Six-axis multi-anvil press for high-pressure, high-temperature neutron diffraction experiments (2014)
    American Institute of Physics (AIP)
    Details
    Publication Date: 2014-11-18
    Description: We developed a six-axis multi-anvil press, ATSUHIME, for high-pressure and high-temperature in situ time-of-flight neutron powder diffraction experiments. The press has six orthogonally oriented hydraulic rams that operate individually to compress a cubic sample assembly. Experiments indicate that the press can generate pressures up to 9.3 GPa and temperatures up to 2000 K using a 6-6-type cell assembly, with available sample volume of about 50 mm 3 . Using a 6-8-type cell assembly, the available conditions expand to 16 GPa and 1273 K. Because the six-axis press has no guide blocks, there is sufficient space around the sample to use the aperture for diffraction and place an incident slit, radial collimators, and a neutron imaging camera close to the sample. Combination of the six-axis press and the collimation devices realized high-quality diffraction pattern with no contamination from the heater or the sample container surrounding the sample. This press constitutes a new tool for using neutron diffraction to study the structures of crystals and liquids under high pressures and temperatures.
    Print ISSN: 0034-6748
    Electronic ISSN: 1089-7623
    Topics: Electrical Engineering, Measurement and Control Technology , Physics
    Published by American Institute of Physics (AIP)
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  • 2
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    Arabidopsis NPL1: a phototropin homolog controlling the chloroplast high-light avoidance response (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-03-17
    Description: Chloroplasts relocate their positions in a cell in response to the intensity of incident light, moving to the side wall of the cell to avoid strong light, but gathering at the front face under weak light to maximize light interception. Here, Arabidopsis thaliana mutants defective in the avoidance response were isolated, and the mutated gene was identified as NPL1 (NPH-like 1), a homolog of NPH1 (nonphototropic hypocotyl 1), a blue light receptor used in phototropism. Hence, NPL1 is likely a blue light receptor regulating the avoidance response under strong light.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kagawa, T -- Sakai, T -- Suetsugu, N -- Oikawa, K -- Ishiguro, S -- Kato, T -- Tabata, S -- Okada, K -- Wada, M -- New York, N.Y. -- Science. 2001 Mar 16;291(5511):2138-41.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉"Unit Process and Combined Circuit," PRESTO, Japan Science and Technology Corporation, 1-8, Honcho 4-chome, Kawaguchi-city, Saitama 332-0012, Japan.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11251116" target="_blank"〉PubMed〈/a〉
    Keywords: Alleles ; Arabidopsis/genetics/*physiology/ultrastructure ; *Arabidopsis Proteins ; Cell Membrane/metabolism ; Chloroplasts/*physiology ; Genes, Plant ; *Light ; Movement ; Mutation ; Phosphoproteins/chemistry/physiology ; Phototropism ; Plant Leaves/metabolism ; Plant Proteins/chemistry/*genetics/*physiology ; Plant Structures/metabolism ; Protein Structure, Tertiary ; RNA, Messenger/genetics/metabolism ; RNA, Plant/genetics/metabolism
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 3
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    ARR1, a transcription factor for genes immediately responsive to cytokinins (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-11-03
    Description: Cytokinins are a class of phytohormones involved in various physiological events of plants. The Arabidopsis sensor histidine kinase CRE1 was recently reported to be a cytokinin receptor. We used a steroid-inducible system to show that the transcription factor-type response regulator ARR1 directs transcriptional activation of the ARR6 gene, which responds to cytokinins without de novo protein synthesis. This fact, together with characteristics of ARR1-overexpressing plants and arr1 mutant plants, indicates that the phosphorelay to ARR1, probably from CRE1, constitutes an intracellular signal transduction occurring immediately after cytokinin perception.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sakai, H -- Honma, T -- Aoyama, T -- Sato, S -- Kato, T -- Tabata, S -- Oka, A -- New York, N.Y. -- Science. 2001 Nov 16;294(5546):1519-21. Epub 2001 Nov 1.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratory of Molecular Biology, Institute for Chemical Research, Kyoto University, Uji, Kyoto 611-0011, Japan.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11691951" target="_blank"〉PubMed〈/a〉
    Keywords: Adenine/*analogs & derivatives/*metabolism/pharmacology ; Arabidopsis/cytology/*genetics/growth & development/metabolism ; *Arabidopsis Proteins ; Blotting, Northern ; Cell Division/drug effects ; Cycloheximide/pharmacology ; Cytokinins/*metabolism/pharmacology ; DNA-Binding Proteins/*metabolism ; Dexamethasone/pharmacology ; Gene Expression Regulation, Plant ; *Genes, Plant ; Kinetin ; Phenotype ; Plant Proteins/metabolism ; Plant Roots/drug effects/growth & development ; Plant Shoots/drug effects/growth & development ; Plants, Genetically Modified ; Protein Kinases/metabolism ; Protein Synthesis Inhibitors/pharmacology ; Receptors, Cell Surface/metabolism ; Signal Transduction ; Transcription Factors/*metabolism ; *Transcriptional Activation
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 4
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    Host plant genome overcomes the lack of a bacterial gene for symbiotic nitrogen fixation (2009)
    Nature Publishing Group (NPG)
    Details
    Publication Date: 2009-11-27
    Description: Homocitrate is a component of the iron-molybdenum cofactor in nitrogenase, where nitrogen fixation occurs. NifV, which encodes homocitrate synthase (HCS), has been identified from various diazotrophs but is not present in most rhizobial species that perform efficient nitrogen fixation only in symbiotic association with legumes. Here we show that the FEN1 gene of a model legume, Lotus japonicus, overcomes the lack of NifV in rhizobia for symbiotic nitrogen fixation. A Fix(-) (non-fixing) plant mutant, fen1, forms morphologically normal but ineffective nodules. The causal gene, FEN1, was shown to encode HCS by its ability to complement a HCS-defective mutant of Saccharomyces cerevisiae. Homocitrate was present abundantly in wild-type nodules but was absent from ineffective fen1 nodules. Inoculation with Mesorhizobium loti carrying FEN1 or Azotobacter vinelandii NifV rescued the defect in nitrogen-fixing activity of the fen1 nodules. Exogenous supply of homocitrate also recovered the nitrogen-fixing activity of the fen1 nodules through de novo nitrogenase synthesis in the rhizobial bacteroids. These results indicate that homocitrate derived from the host plant cells is essential for the efficient and continuing synthesis of the nitrogenase system in endosymbionts, and thus provide a molecular basis for the complementary and indispensable partnership between legumes and rhizobia in symbiotic nitrogen fixation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hakoyama, Tsuneo -- Niimi, Kaori -- Watanabe, Hirokazu -- Tabata, Ryohei -- Matsubara, Junichi -- Sato, Shusei -- Nakamura, Yasukazu -- Tabata, Satoshi -- Jichun, Li -- Matsumoto, Tsuyoshi -- Tatsumi, Kazuyuki -- Nomura, Mika -- Tajima, Shigeyuki -- Ishizaka, Masumi -- Yano, Koji -- Imaizumi-Anraku, Haruko -- Kawaguchi, Masayoshi -- Kouchi, Hiroshi -- Suganuma, Norio -- England -- Nature. 2009 Nov 26;462(7272):514-7. doi: 10.1038/nature08594.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉National Institute of Agrobiological Sciences, Tsukuba, Ibaraki 305-8602, Japan.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19940927" target="_blank"〉PubMed〈/a〉
    Keywords: Azotobacter vinelandii ; Gene Expression Regulation, Plant ; *Genes, Bacterial ; Genes, Plant/genetics ; Genetic Complementation Test ; Genome, Plant/*genetics ; Ketoglutaric Acids/metabolism ; Lotus/enzymology/*genetics/*metabolism ; Molecular Sequence Data ; Mutation/genetics ; Nitrogen Fixation/*genetics ; Oxo-Acid-Lyases/deficiency/genetics/metabolism ; Plant Proteins/genetics/metabolism ; Rhizobium/genetics/*metabolism ; Saccharomyces cerevisiae/enzymology/genetics ; Symbiosis/*genetics ; Tricarboxylic Acids/metabolism
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Published by Nature Publishing Group (NPG)
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  • 5
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    A cytokinin perception mutant colonized by Rhizobium in the absence of nodule organogenesis (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2006-11-18
    Description: In legumes, Nod-factor signaling by rhizobia initiates the development of the nitrogen-fixing nodule symbiosis, but the direct cell division stimulus that brings about nodule primordia inception in the root cortex remains obscure. We showed that Lotus japonicus plants homozygous for a mutation in the HYPERINFECTED 1 (HIT1) locus exhibit abundant infection-thread formation but fail to initiate timely cortical cell divisions in response to rhizobial signaling. We demonstrated that the corresponding gene encodes a cytokinin receptor that is required for the activation of the nodule inception regulator Nin and nodule organogenesis.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Murray, Jeremy D -- Karas, Bogumil J -- Sato, Shusei -- Tabata, Satoshi -- Amyot, Lisa -- Szczyglowski, Krzysztof -- New York, N.Y. -- Science. 2007 Jan 5;315(5808):101-4. Epub 2006 Nov 16.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Agriculture and Agri-Food Canada, Southern Crop Protection and Food Research Centre, 1391 Sandford Street, London, Ontario N5V 4T3, Canada.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17110535" target="_blank"〉PubMed〈/a〉
    Keywords: Alleles ; Alphaproteobacteria/growth & development/*physiology ; Cell Division ; Cytokinins/*metabolism/pharmacology ; Genes, Plant ; Lipopolysaccharides/metabolism ; Lotus/genetics/*microbiology/*physiology ; Mutation ; Nitrogen Fixation ; Plant Epidermis/cytology/metabolism ; Plant Proteins/genetics/metabolism ; Plant Roots/cytology/metabolism/microbiology ; Protein Kinases/*genetics/*metabolism ; Receptors, Cell Surface/genetics/metabolism ; Root Nodules, Plant/cytology/*growth & development/microbiology ; *Signal Transduction ; Symbiosis
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 6
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    A gain-of-function mutation in a cytokinin receptor triggers spontaneous root nodule organogenesis (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2006-11-18
    Description: Legume root nodules originate from differentiated cortical cells that reenter the cell cycle and form organ primordia. We show that perception of the phytohormone cytokinin is a key element in this switch. Mutation of a Lotus japonicus cytokinin receptor gene leads to spontaneous development of root nodules in the absence of rhizobia or rhizobial signal molecules. The mutant histidine kinase receptor has cytokinin-independent activity and activates an Escherichia coli two-component phosphorelay system in vivo. Mutant analysis shows that cytokinin signaling is required for cell divisions that initiate nodule development and defines an autoregulated process where cytokinin induction of nodule stem cells is controlled by shoots.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Tirichine, Leila -- Sandal, Niels -- Madsen, Lene H -- Radutoiu, Simona -- Albrektsen, Anita S -- Sato, Shusei -- Asamizu, Erika -- Tabata, Satoshi -- Stougaard, Jens -- New York, N.Y. -- Science. 2007 Jan 5;315(5808):104-7. Epub 2006 Nov 16.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratory of Gene Expression, Department of Molecular Biology, University of Aarhus, Gustav Wieds Vej 10, DK-8000 Aarhus C, Denmark.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17110537" target="_blank"〉PubMed〈/a〉
    Keywords: Alleles ; Amino Acid Motifs ; Amino Acid Sequence ; Calcium/metabolism ; Cell Division ; Cytokinins/*metabolism/pharmacology ; Escherichia coli/genetics ; Gene Expression Regulation, Plant ; Genes, Plant ; Kinetin/pharmacology ; Lipopolysaccharides/metabolism ; Lotus/genetics/metabolism/*physiology ; Meristem/cytology ; Molecular Sequence Data ; Mutation ; Nitrogen Fixation ; Plant Roots/cytology/metabolism ; Plants, Genetically Modified ; Protein Kinases/chemistry/*genetics/*metabolism ; Receptors, Cell Surface/chemistry/genetics/metabolism ; Root Nodules, Plant/cytology/*growth & development/metabolism ; *Signal Transduction ; Transformation, Genetic
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 7
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    Trends and long-term variability of ocean properties at Ocean Station P in the northeast Pacific Ocean [abstract] (2021)
    In:  http://aquaticcommons.org/id/eprint/14478 | 8 | 2014-02-08 00:25:37 | 14478
    Details
    Publication Date: 2021-06-25
    Description: Twenty-seven years (1956-1983) of oceanographic data collected at Ocean Station P (50°N/145°W), as well as supplementary data obtained in its neighborhood, have been examined for trends and interannual variability in the northeast Pacific Ocean. There is evidence that the water is warming and freshening and that the isopycnal surfaces are deepening. Trends in oxyty are mostly not significant. The most common periods for the interannual variability appear to be 2 1/2 and 6-7 years. The vertical movement of water accounts for one half of the changes in temperature and salinity and 30% of those in oxyty. Other factors, such as a shift of water masses, may also be important.
    Keywords: Oceanography ; PACLIM
    Repository Name: AquaDocs
    Type: conference_item
    Format: application/pdf
    Format: application/pdf
    Format: 43-43
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  • 8
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    Topic 1. Some steric-height features of the water off the Pacific coast of Canada; Topic 2. Possible warming of the water at station P in the northeast Pacific during 1956-1984 [abstract] (2021)
    In:  http://aquaticcommons.org/id/eprint/14319 | 8 | 2014-01-27 22:11:38 | 14319
    Details
    Publication Date: 2021-07-10
    Description: TOPIC 1: In terms of seasonal scale, temperature effect dominates the annual change of steric height in the open ocean whereas salinity effect controls it along the continental shelf. Large portion of the annual change of height relative to the 1000-db surface is contained in the upper 100m layer. However, in interannual scale large anomalies of steric height in the open ocean, are more often than not, caused by halosteric rather than thermosteric effect. At least in the open ocean the heights are almost totally determined by the behavior of deep water. Their interannual variability appears to be relatedto the cumulative effect of Eckman pumping.TOPIC 2: There is a "trend" that over the past 28 years the water atStation P has warmed. Least-square analysis indicates that this warming may be significant but shortening of the time-series data by approximately 10 years fails to show that this is the case. These "trends" have to be interpreted with care. The warming may be "apparent" in that it is not indicated clearly in the deep isopynal surfaces which, during the above period, have deepened. Thuswarming at the isobaric surfaces may be the effect of the downward migration of the isopynal surfaces.
    Keywords: Oceanography ; PACLIM
    Repository Name: AquaDocs
    Type: conference_item
    Format: application/pdf
    Format: application/pdf
    Format: 26-26
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  • 9
    Electronic Resource
    Electronic Resource
    Blood-Brain Barrier Transport of Ebiratide and Its Uptake by Cerebral Neuronal Cells (1993)
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 680 (1993), S. 0 
    Details
    ISSN: 1749-6632
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1749-6632.1993.tb19753.x
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  • 10
    Electronic Resource
    Electronic Resource
    LESSONS FROM SEQUENCING OF THE GENOME OF A UNICELLULAR CYANOBACTERIUM, SYNECHOCYSTIS SP. PCC6803 (1998)
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Plant Physiology and Plant Molecular Biology 49 (1998), S. 151-171 
    Details
    ISSN: 1040-2519
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Biology
    Notes: Abstract The nucleotide sequence of the entire genome of the unicellular cyanobacterium, Synechocystis sp. PCC6803, has been determined. The length of the circular genome was 3,573,480 bp, and a total of 3168 protein-coding genes were assigned to the genome by a computer-assisted analysis. The functions of approximately 45% of the genes were deduced based on sequence similarity to known genes. Here are distinctive features of genetic information carried by the cyanobacteria, which have a phylogenetic relationship to both bacteria and plants.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1146/annurev.arplant.49.1.151
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