GLORIA

GEOMAR Library Ocean Research Information Access

X

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Online Resource
    Online Resource
    Biogeographical distributions of nitrogen‐cycling functional genes in a subtropical estuary
    Wiley ; 2022
    In:  Functional Ecology Vol. 36, No. 1 ( 2022-01), p. 187-201
    Details
    In: Functional Ecology, Wiley, Vol. 36, No. 1 ( 2022-01), p. 187-201
    Abstract: Microbial biogeography has predominantly been studied through a taxonomic lens. However, functional properties of microbial communities are often decoupled from their taxonomic compositions, emphasizing the need to study the biogeography of microbial functional genes directly. Here, using the Pearl River Estuary (PRE) sediments as a study system, we characterized the biogeographical patterns of the diversities and abundances of key microbial nitrogen‐cycling genes using metagenomic techniques. We found that functional genes involved in denitrification and dissimilatory nitrate reduction to ammonium pathways were more diverse and abundant than genes involved in other processes (i.e. nitrogen fixation, nitrification, assimilatory nitrite reduction). The diversities and abundances of certain nitrogen‐cycling genes were, to some extent, spatially decoupled. Specifically, the diversities of narG , napA , nirK and nrfA were greater adjacent to the river outlet, whereas the abundances of narG , napA and norB were greater in the downstream of the PRE. These spatial variations were mainly driven by water depth, C/N and . Moreover, nitrogen‐cycling genes involved in the same pathways (e.g. denitrification) showed no consistent responses to environmental changes and the main taxa involved in different nitrogen‐cycling steps were diverse, providing important clues for explaining why the abundance of single functional gene often seems not to be a reliable proxy for the specific process rate. Overall, our results demonstrate that studying the biogeography of microbial functional genes can help expand our knowledge of the nitrogen cycle from a biogeographical perspective. A free Plain Language Summary can be found within the Supporting Information of this article.
    Type of Medium: Online Resource
    ISSN: 0269-8463 , 1365-2435
    URL: Issue
    URL: Article
    DOI: 10.1111/fec.v36.1
    DOI: 10.1111/1365-2435.13949
    Language: English
    Publisher: Wiley
    Publication Date: 2022
    detail.hit.zdb_id: 2020307-X
    detail.hit.zdb_id: 619313-4
    SSG: 12
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 2
    Online Resource
    Online Resource
    Preparation and properties of three‐dimensional boron nitride submicron tube/epoxy resin composites with high thermal conductivity
    Wiley ; 2023
    In:  Polymer Composites Vol. 44, No. 6 ( 2023-06), p. 3477-3486
    Details
    In: Polymer Composites, Wiley, Vol. 44, No. 6 ( 2023-06), p. 3477-3486
    Abstract: Heat dissipation of electronic devices was an urgent problem to be addressed. In this paper, magnesium borate whiskers were used as the template for the preparation of the boron nitride submicron tube (BNST). Then the polymer‐free supported three‐dimensional boron nitride submicron tube skeleton was prepared by sacrificing the material ammonia bicarbonate. Finally, high thermal conductivity boron nitride submicron tube/epoxy resin (BNST/EP) composites were prepared by infiltrating technique. The phase, chemical composition, microstructure, thermal conductivity, and thermal stability of the samples were studied by X‐ray diffraction, scanning electron microscopy, and other characterization methods. The results show that BNST has an average diameter was 2 um and the tube length was 5–20 um. The surface of BNST was loaded with a large number of boron nitride nanosheets. The in‐plane thermal conductivity of the BNST/EP composite was improved by the three‐dimensional BNST skeleton. When the BNST was 39.28 wt%, the in‐plane thermal conductivity reached 1.632 W/(m K). Compared with pure EP, the in‐plane thermal conductivity was increased by 782.2%. BNST played a good physical barrier effect on the matrix, so the thermal stability of the composite was greatly improved. This strategy will open up a new path to prepare heat dissipation materials.
    Type of Medium: Online Resource
    ISSN: 0272-8397 , 1548-0569
    URL: Issue
    URL: Article
    DOI: 10.1002/pc.v44.6
    DOI: 10.1002/pc.27335
    Language: English
    Publisher: Wiley
    Publication Date: 2023
    detail.hit.zdb_id: 1475935-4
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 3
    Online Resource
    Online Resource
    dNK cells facilitate the interaction between trophoblastic and endothelial cells via VEGF‐C and HGF
    Wiley ; 2017
    In:  Immunology & Cell Biology Vol. 95, No. 8 ( 2017-09), p. 695-704
    Details
    In: Immunology & Cell Biology, Wiley, Vol. 95, No. 8 ( 2017-09), p. 695-704
    Abstract: Decidual NK (dNK) cells, identified as CD56 bright CD16 − CD3 − , account for ~70% of lymphocytes within the uterine wall during early pregnancy. Accumulating evidence suggests that tight interactions between placental trophoblasts and dNK cells are critical for trophoblast cell differentiation. However, the underlying mechanism remains to be explored in detail. In the present study, conditioned medium (CM) was collected from cultured primary human dNK cells. Primary cytotrophoblasts (CTBs) or the human trophoblast cell line HTR8/SVneo was treated with dNK‐CM and co‐cultured with human umbilical vein endothelial cells (HUVECs) in a three‐dimensional Matrigel scaffold, and the formation of tube structures was dynamically monitored with live cell imaging. Trophoblast invasion was analyzed with a transwell invasion assay. The data demonstrated that the treatment of HTR8/SVneo cells or CTBs with dNK‐CM remarkably promoted trophoblast invasion and tube formation in the presence of HUVECs. The epithelial marker E‐cadherin was reduced, while the expression of endothelial markers NCAM, VE‐cadherin and integrin β1 was significantly promoted in the HTR8/SVneo cells upon treatment with dNK‐CM. Antibody blocking experiments revealed that the dNK cells promoted trophoblast invasion through the production of IL‐8 and HGF, and they induced trophoblast differentiation toward endothelial phenotype by producing VEGF‐C and HGF. These results provide new evidence to clarify the finely tuned interactions between trophoblasts and dNK cells at the maternal–fetal interface.
    Type of Medium: Online Resource
    ISSN: 0818-9641 , 1440-1711
    URL: Article
    DOI: 10.1038/icb.2017.45
    Language: English
    Publisher: Wiley
    Publication Date: 2017
    detail.hit.zdb_id: 2011707-3
    SSG: 12
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 4
    Online Resource
    Online Resource
    Efficient combination of circulating ultrasound‐assisted extraction and centrifugal partition chromatography for extraction and on‐line separation of chemical constituents from Stellera chamaejasme L.
    Wiley ; 2015
    In:  Phytochemical Analysis Vol. 26, No. 5 ( 2015-09), p. 301-309
    Details
    In: Phytochemical Analysis, Wiley, Vol. 26, No. 5 ( 2015-09), p. 301-309
    Abstract: Development of a new preparation method using circulating ultrasonic‐assisted extraction (CUAE) coupled with centrifugal partition chromatography (CPC) for continuous extraction and online isolation of chemical constituents from Stellera chamaejasme L. Four target compounds (daphnoretin, chamaechromone, neochamaejasmin A, and isochamaejasmin) with purities above 96% were successfully extracted and isolated online via CUAE/CPC. The instrumental setup achieved a scientific and systematic extraction and isolation of natural products and has great potential for industrial application.
    Type of Medium: Online Resource
    ISSN: 0958-0344 , 1099-1565
    URL: Issue
    URL: Article
    DOI: 10.1002/pca.v26.5
    DOI: 10.1002/pca.2564
    Language: English
    Publisher: Wiley
    Publication Date: 2015
    detail.hit.zdb_id: 1498615-2
    SSG: 12
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 5
    Online Resource
    Online Resource
    Ambient Ammonia Synthesis via Electrochemical Reduction of Nitrate Enabled by NiCo 2 O 4 Nanowire Array
    Wiley ; 2022
    In:  Small Vol. 18, No. 13 ( 2022-04)
    Details
    In: Small, Wiley, Vol. 18, No. 13 ( 2022-04)
    Abstract: NiCo 2 O 4 nanowire array on carbon cloth (NiCo 2 O 4 /CC) is proposed as a highly active electrocatalyst for ambient nitrate (NO 3 − ) reduction to ammonia (NH 3 ). In 0.1 m NaOH solution with 0.1 m NaNO 3 , such NiCo 2 O 4 /CC achieves a high Faradic efficiency of 99.0% and a large NH 3 yield up to 973.2 µmol h −1  cm −2 . The superior catalytic activity of NiCo 2 O 4 comes from its half‐metal feature and optimized adsorption energy due to the existence of Ni in the crystal structure. A Zn‐NO 3 − battery with NiCo 2 O 4 /CC cathode also shows a record‐high battery performance.
    Type of Medium: Online Resource
    ISSN: 1613-6810 , 1613-6829
    URL: Issue
    URL: Article
    DOI: 10.1002/smll.v18.13
    DOI: 10.1002/smll.202106961
    Language: English
    Publisher: Wiley
    Publication Date: 2022
    detail.hit.zdb_id: 2168935-0
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 6
    Online Resource
    Online Resource
    Spark plasma sintering of boron nitride micron tubes reinforced boron carbide ceramics with excellent mechanical property
    Wiley ; 2023
    In:  International Journal of Applied Ceramic Technology Vol. 20, No. 3 ( 2023-05), p. 1457-1469
    Details
    In: International Journal of Applied Ceramic Technology, Wiley, Vol. 20, No. 3 ( 2023-05), p. 1457-1469
    Abstract: In this paper, the novel boron nitride micron tubes (BNMTs) were used to reinforce commercial boron carbide (B 4 C) ceramics prepared via spark plasma sintering technology. The effects of the sintering parameters, sintering temperature, the holding time, and the BNMTs content on the microstructure and mechanical properties of B 4 C/BNMTs composite ceramics were studied. The results indicated that adding a proper amount of BNMTs could inhibit the grain growth of B 4 C and improve the fracture toughness of the B 4 C/BNMTs composite ceramics. The prepared composite ceramic sample with 5 wt% BNMTs at 1850°C, 8 min and 30 MPa displayed the best mechanical properties. The relative density, hardness, fracture toughness, and bending strength of the samples were 99.7% ± .1%, 35.62 ± .43 GPa, 6.23 ± .2 MPa m 1/2 , and 517 ± 7.8 MPa, respectively. Therein, the corresponding value of hardness, fracture toughness, and bending strength was increased by 10.3%, 43.59%, and 61.5%, respectively, than that of the B 4 C/BNMTs composite ceramic without BNMTs. It was proved that the high interface binding energy and bridging effect between boron carbide and BNMTs were the toughening principle of BNMTs.
    Type of Medium: Online Resource
    ISSN: 1546-542X , 1744-7402
    URL: Issue
    URL: Article
    DOI: 10.1111/ijac.v20.3
    DOI: 10.1111/ijac.14308
    Language: English
    Publisher: Wiley
    Publication Date: 2023
    detail.hit.zdb_id: 2167226-X
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 7
    Online Resource
    Online Resource
    Growth and electrical properties of high‐Curie point rhombohedral Mn‐Pb(In 1/2 Nb 1/2 )O 3 ‐Pb(Mg 1/3 Nb 2/3 )O 3 ‐PbTiO 3 thin films
    Wiley ; 2021
    In:  Journal of the American Ceramic Society Vol. 104, No. 1 ( 2021-01), p. 313-321
    Details
    In: Journal of the American Ceramic Society, Wiley, Vol. 104, No. 1 ( 2021-01), p. 313-321
    Abstract: High‐quality ternary relaxor ferroelectric (100)‐oriented Mn‐doped 0.36Pb(In 1/2 Nb 1/2 )O 3 ‐0.36Pb(Mg 1/3 Nb 2/3 )O 3 ‐0.28PbTiO 3 (Mn‐PIMNT) thin films were grown on SrRuO 3 ‐buffered SrTiO 3 single‐crystal substrate in a wide deposition temperature range of 550‐620°C using the pulsed laser deposition method. The phase structure, ferroelectric, dielectric, piezoelectric properties, and nanoscale domain evolution were studied. Under the deposition temperature of 620°C, the ferroelectric hysteresis loops and current‐voltage curves showed that the film owned significantly enhanced remnant ferroelectric polarization of 34.5 μC/cm 2 and low leakage current density of 2.7 × 10 −10  A/cm 2 . Moreover fingerprint‐type nanosized domain patterns with polydomain structures and well‐defined macroscopic piezoelectric properties with a high normalized strain constant of 40 pm/V was obtained. Under in situ DC electric field, the domain evolution was investigated and 180° domain reversal was observed through piezoelectric force microscope. These global electrical properties make the current Mn‐PIMNT thin films very promising in piezoelectric MEMS applications.
    Type of Medium: Online Resource
    ISSN: 0002-7820 , 1551-2916
    URL: Issue
    URL: Article
    DOI: 10.1111/jace.v104.1
    DOI: 10.1111/jace.17456
    RVK:
    VA 1120
    Language: English
    Publisher: Wiley
    Publication Date: 2021
    detail.hit.zdb_id: 2008170-4
    detail.hit.zdb_id: 219232-9
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 8
    Online Resource
    Online Resource
    Molecular phylogeographic analyses and species delimitations reveal that Leopoldamys edwardsi (Rodentia: Muridae) is a species complex
    Wiley ; 2019
    In:  Integrative Zoology Vol. 14, No. 5 ( 2019-09), p. 494-505
    Details
    In: Integrative Zoology, Wiley, Vol. 14, No. 5 ( 2019-09), p. 494-505
    Abstract: Leopoldamys edwardsi is a species with wide distribution ranges in southern China but is not discussed in studies on geographic variation and species differentiation. We used 2 mitochondrial ( Cytb, CO1 ) and 3 nuclear ( GHR, IRBP and RAG1 ) genes to clarify species phylogeography and geographical differentiation. Maximum likelihood (ML) and Bayesian phylogenetic inference (BI) trees consistently indicated that L. edwardsi is a species complex containing 3 main lineages with high Kimura‐2‐parameter (K2P) divergences (i.e. lineages L N , L S and L HN ) found in the northern and southern China and Hainan Island, respectively. The 3 species delimitation methods, automated barcoding gap discovery, Bayesian poisson tree process analysis and Bayesian phylogenetics and phylogeography, consistently supported the existence of cryptic species. Divergence times among the main lineages were inferred to be during the Pleistocene, with L HN /L S split at 1.33 Ma and L N /(L HN +L S ) at 2.61 Ma; the diversifications of L. edwardsi complex might be caused by the rapid uplifts of Tibetan Plateau, paleoclimate change and complex topography. The divergence between L HN and L S was probably related to the separation of Hainan Island from the mainland via the formation of the Qiongzhou Strait. Lineages L N and (L S +L HN ) likely diverged due to the Wuyi‐Nanling mountain range forming a dispersal barrier. Our results suggested that L. edwardsi complex contains at least 3 distinct species: L HN represents L. hainanensis , endemic to Hainan Island and previously considered as a subspecies L. e. hainanensis ; L S represents a cryptic species distributed throughout the southern Chinese continent; and L N represents the nominotypical species L. edwardsi .
    Type of Medium: Online Resource
    ISSN: 1749-4877 , 1749-4877
    URL: Issue
    URL: Article
    DOI: 10.1111/inz2.2019.14.issue-5
    DOI: 10.1111/1749-4877.12378
    Language: English
    Publisher: Wiley
    Publication Date: 2019
    detail.hit.zdb_id: 2570656-1
    SSG: 12
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 9
    Online Resource
    Online Resource
    Synergistic effect of honokiol and 5‐fluorouracil on apoptosis of oral squamous cell carcinoma cells
    Wiley ; 2017
    In:  Journal of Oral Pathology & Medicine Vol. 46, No. 3 ( 2017-03), p. 201-207
    Details
    In: Journal of Oral Pathology & Medicine, Wiley, Vol. 46, No. 3 ( 2017-03), p. 201-207
    Abstract: 5‐Fluorouracil (5‐ FU ) is an essential chemotherapeutic agent for oral squamous cell carcinoma ( OSCC ). However, toxic side effects have limited its role in OSCC therapy. The aim of this study was to explore whether combination therapy with 5‐ FU and honokiol ( HNK ), a small natural organic molecule shown to induce apoptosis in OSCC cells, could enhance the anticancer activity of 5‐ FU without notably increasing its toxicity. Methods 5‐ FU and/or HNK were used to treat OSCC cells both in vitro and in vivo . The therapeutic effect and underlying mechanisms were evaluated by cell viability assay, flow cytometry, OSCC xenograft mouse model, and Western blot. Tumor tissue apoptosis was detected by terminal deoxynucleotidyl transferase dUTP nick‐end labeling ( TUNEL ) assay. Toxicity was assessed following hematoxylin and eosin staining. Results Exposure to HNK + 5‐ FU produced a synergistic cytotoxic effect on OSCC cells. Both HNK and 5‐ FU could induce apoptosis through the mitochondria‐mediated intrinsic pathway, and their specific signaling pathways were different. In the mouse OSCC xenograft model, treatment with 5‐ FU + HNK substantively retarded tumor growth, as compared to treatment with either drug individually. TUNEL analysis further confirmed that the superior in vivo antitumor efficacy of 5‐ FU + HNK was associated with enhanced stimulation of cell apoptosis. Notably, HNK did not increase the toxicity of 5‐ FU . Conclusion These findings suggest that HNK and 5‐ FU exert a synergistic therapeutic effect on OSCC by inducing apoptosis. HNK might thus enhance the clinical therapeutic efficacy of 5‐ FU without increasing its toxicity.
    Type of Medium: Online Resource
    ISSN: 0904-2512 , 1600-0714
    URL: Issue
    URL: Article
    DOI: 10.1111/jop.2017.46.issue-3
    DOI: 10.1111/jop.12481
    Language: English
    Publisher: Wiley
    Publication Date: 2017
    detail.hit.zdb_id: 2026385-5
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 10
    Online Resource
    Online Resource
    PHOTO‐SENSITIVE LEAF ROLLING 1 encodes a polygalacturonase that modifies cell wall structure and drought tolerance in rice
    Wiley ; 2021
    In:  New Phytologist Vol. 229, No. 2 ( 2021-01), p. 890-901
    Details
    In: New Phytologist, Wiley, Vol. 229, No. 2 ( 2021-01), p. 890-901
    Abstract: The biosynthesis and modification of cell wall composition and structure are controlled by hundreds of enzymes and have a direct consequence on plant growth and development. However, the majority of these enzymes has not been functionally characterised. Rice mutants with leaf‐rolling phenotypes were screened in a field. Phenotypic analysis under controlled conditions was performed for the selected mutant and the relevant gene was identified by map‐based cloning. Cell wall composition was analysed by glycome profiling assay. We identified a photo‐sensitive leaf rolling 1 ( psl1 ) mutant with ‘napping’ (midday depression of photosynthesis) phenotype and reduced growth. The PSL1 gene encodes a cell wall‐localised polygalacturonase (PG), a pectin‐degrading enzyme. psl1 with a 260‐bp deletion in its gene displayed leaf rolling in response to high light intensity and/or low humidity. Biochemical assays revealed PG activity of recombinant PSL1 protein. Significant modifications to cell wall composition in the psl1 mutant compared with the wild‐type plants were identified. Such modifications enhanced drought tolerance of the mutant plants by reducing water loss under osmotic stress and drought conditions. Taken together, PSL1 functions as a PG that modifies cell wall biosynthesis, plant development and drought tolerance in rice.
    Type of Medium: Online Resource
    ISSN: 0028-646X , 1469-8137
    URL: Issue
    URL: Article
    DOI: 10.1111/nph.v229.2
    DOI: 10.1111/nph.16899
    Language: English
    Publisher: Wiley
    Publication Date: 2021
    detail.hit.zdb_id: 208885-X
    detail.hit.zdb_id: 1472194-6
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...