ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

feed icon rss

Your email was sent successfully. Check your inbox.

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

Proceed reservation?

Export
Filter
  • MDPI  (44)
  • PANGAEA  (4)
  • Royal Society of Chemistry  (4)
  • American Chemistry Society  (2)
Collection
Keywords
  • 1
    facet.materialart.
    Unknown
    PANGAEA
    In:  Supplement to: Ramesh, Kirti; Melzner, Frank; Griffith, Andrew W; Gobler, Christopher J; Rouger, Caroline; Tasdemir, Deniz; Nehrke, Gernot (2018): In vivo characterization of bivalve larval shells: a confocal Raman microscopy study. Journal of The Royal Society Interface, 15(141), 20170723, https://doi.org/10.1098/rsif.2017.0723
    Publication Date: 2023-06-24
    Description: In vivo confocal Raman microscopy (CRM), polarized light microscopy and Fourier transform infrared spectroscopy (FTIR) were used to determine if a significant amount of amorphous calcium carbonate (ACC) exists within larval shells of Baltic mytilid mussels (Mytilus edulis-like) and whether the amount of ACC varies during larval development. No evidence for ACC was found from the onset of shell deposition at 21 h post-fertilization (hpf) until 48 hpf. Larval Mytilus shells were crystalline from 21 hpf onwards and exhibited CRM and FTIR peaks characteristic of aragonite. Prior to shell deposition at 21 hpf, no evidence for carbonates was observed through in vivo CRM. We further analysed the composition of larval shells in three other bivalve species, Mercenaria mercenaria, Crassostrea gigas and Crassostrea virginica and observed no evidence for ACC, which is in contrast to previous work on the same species. Our findings indicate that larval bivalve shells are composed of crystalline aragonite and we demonstrate that conflicting results are related to sub-optimal measurements and misinterpretation of CRM spectra. Our results demonstrate that the common perception that ACC generally occurs as a stable and abundant precursor during larval bivalve calcification needs to be critically reviewed.
    Keywords: Analytical method; Sample code/label; Species; Transmission of light; Wave number
    Type: Dataset
    Format: text/tab-separated-values, 143020 data points
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 2
    Publication Date: 2024-05-02
    Description: Identification of 16 selected bacteria associated to the umbrella of Periphylla periphylla collected in the Irminger Sea based on sequencing of the 16S ribosomal RNA gene and BLAST against the NCBI nucleotide database. The table displays the first 3 hits from two blastn searches, one against all database entries and the second against type strains only. Nucleotide identities (%) with database hits and NCBI accession numbers assigned to the isolated bacteria are also displayed. Colonies were cultured either in marine broth, Hastings medium or Wickerham medium for comparison.
    Keywords: A7-2020; A7-2020_417; Accession number, genetics; Arni Fridriksson; Bacterial strain; Basic Local Alignment Search Tool, National Center for Biotechnology Information, Nucleotide BLAST; blastn; Gene name; Identity; IESSNS_2020; Laboratory experiment; Multipurpose pelagic trawl - 832; MULTPELT-832; Nordic Seas; Sanger Sequencing modified after Sanger et al. (1977); Sequence length; Source material; Species, unique identification; Species, unique identification (Semantic URI); Species, unique identification (URI); SUMMER; Sustainable Management of Mesopelagic Resources; Temperature, air; Treatment: culture medium; Type of study; VID; Visual identification
    Type: Dataset
    Format: text/tab-separated-values, 720 data points
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 3
    Publication Date: 2024-05-02
    Description: Putative annotation of metabolites produced by the Psychrobacter sp. SU143, Psychrobacter sp. SU137, Shewanella sp. SU126 and Polaribacter sp. SU124 in the liquid and solid regime of Marine Broth and Glucose-Yeast-Malt media. Annotation was based on the m/z [M+H]+ or other adducts, retention time, predicted molecular formula, fragmentation pattern and source of the hit. The source of the ion is indicated by the area under a peak (peak area count). Confidence level of annotation are given based on the reporting standards proposed by Sumner, et al. 2007, i.e. identified compound, is putative annotation without reference standards, is putative characterized compound class, and is unknown compound. The mass spectrometry data used for the molecular networking analysis were deposited in the MassIVE Public GNPS database under the accession number MSV000091067.
    Keywords: A7-2020; A7-2020_417; Adduct ion; Annotation; Arni Fridriksson; Bacterial strain; Class, compound; Confidence level; Feature-based molecular networking according to Nothias et al. 2020; Fragment ion, molecular mass; Genus, unique identification; Genus, unique identification (Semantic URI); Genus, unique identification (URI); IESSNS_2020; Laboratory experiment; LC-MS/MS; Molecular formula; Multipurpose pelagic trawl - 832; MULTPELT-832; Nordic Seas; Parent ion, molecular mass; Peak area; Retention time; Sanger Sequencing modified after Sanger et al. (1977); SUMMER; Sustainable Management of Mesopelagic Resources; Temperature, air; Treatment: culture medium; Type of study; Ultra-high-performance liquid chromatography (UHPLC), Waters, Acquity UPLC I-Class System; coupled with quadrupole-time-of-flight mass spectrometer, Waters, Xevo G2-XS QToF; Uniform resource locator/link to reference
    Type: Dataset
    Format: text/tab-separated-values, 10257 data points
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 4
    Publication Date: 2024-05-02
    Description: This study aimed at isolating microorganisms associated with the mesopelagic jellyfish Periphylla periphylla collected in Irminger Sea at a depth of 325 m in July 2020. Three different solid cultivation media; Hastings, Marine agar and Wickerham media were used for the isolation of the associated microorganisms. A total of 43 bacteria were isolated from the inner and outer surfaces of the umbrella of P. periphylla, but unfortunately, no fungal strain was isolated. Isolates were further identified by Sanger sequencing of the 16S rRNA gene, and based on phylogenetic distinctiveness (differences in closest relative species according to the nucleotide BLAST), 16 bacteria belonging to 8 different genera were selected and subjected to an OSMAC cultivation regime approach using liquid and solid marine broth and glucose– yeast–malt media. After 7 days of cultivation, cultures were extracted with ethyl acetate and assessed for antimicrobial activity against fish and human pathogens. Based on antimicrobial activity assessment, four most bioactive strains; Polaribacter sp. SU124, Shewanella sp. SU126, Psychrobacter sp. SU143 and Psychrobacter sp. SU137, were prioritized for a comparative and untargeted metabolomics analysis using feature-based molecular networking. These findings highlight the biotechnological potential of P. periphylla-associated microbiota.
    Keywords: Laboratory experiment; SUMMER; Sustainable Management of Mesopelagic Resources
    Type: Dataset
    Format: application/zip, 2 datasets
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 5
    Publication Date: 2020-02-06
    Description: Linear diterpenes that are commonly found in brown algae are of high chemotaxonomic and ecological importance. This study reports bifurcatriol (1), a new linear diterpene featuring two stereogenic centers isolated from the Irish brown alga Bifurcariabifurcata. The gross structure of this new natural product was elucidated based on its spectroscopic data (IR, 1D and 2D-NMR, HRMS). Its absolute configuration was identified by experimental and computational vibrational circular dichroism (VCD) spectroscopy, combined with the calculation of 13C-NMR chemical shielding constants. Bifurcatriol (1) was tested for in vitro antiprotozoal activity towards a small panel of parasites (Plasmodium falciparum, Trypanosoma brucei rhodesiense, T. cruzi, and Leishmania donovani) and cytotoxicity against mammalian primary cells. The highest activity was exerted against the malaria parasite P. falciparum (IC50 value 0.65 μg/mL) with low cytotoxicity (IC50 value 56.6 μg/mL). To our knowledge, this is the first successful application of VCD and DP4 probability analysis of the calculated 13C-NMR chemical shifts for the simultaneous assignment of the absolute configuration of multiple stereogenic centers in a long-chain acyclic natural product.
    Type: Article , PeerReviewed
    Format: text
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 6
    Publication Date: 2021-03-19
    Description: The combination of LC-MS/MS based metabolomics approach and anti-MRSA activity-guided fractionation scheme was applied on the Gram-negative bacterium Aequorivita sp. isolated from shallow Antarctic sea sediment using a miniaturized culture chip technique. This methodology afforded the isolation of three new (1–3) and four known (4–7) N-terminal glycine- or serine-bearing iso-fatty acid amides esterified with another iso-fatty acid through their C-3 hydroxy groups. The chemical structures of the new compounds were elucidated using a set of spectroscopic (NMR, [α]D and FT-IR) and spectrometric (HRMS, HRMS/MS) methods. The aminolipids possessing an N-terminal glycine unit (1, 2, 4, 5) showed moderate in vitro antimicrobial activity against MRSA (IC50 values 22–145 µg/mL). This is the first in-depth chemistry and biological activity study performed on the microbial genus Aequorivita.
    Type: Article , PeerReviewed
    Format: text
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 7
    facet.materialart.
    Unknown
    American Chemistry Society
    In:  Journal of Natural Products, 77 (3). pp. 439-440.
    Publication Date: 2015-01-06
    Type: Article , PeerReviewed
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 8
    Publication Date: 2018-06-20
    Description: Correct assignment of the stereogenic centers of highly flexible linear diterpenes (LDs) is challenging. Herein we report the first application of VCD spectroscopy for the absolute configuration determination of LDs of algal origin and provide experimental and computational procedures, such as a fragmentation approach, which will facilitate the use of VCD spectroscopy for configuration assignments of LDs.
    Type: Article , PeerReviewed
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 9
    Publication Date: 2017-04-13
    Description: Antifungal bioactivity-guided fractionation of the organic extract of the sponge Polymastia boletiformis, collected from the west coast of Ireland, led to the isolation of two new sulfated steroid-amino acid conjugates (1 and 2). Extensive 1D and 2D NMR analyses in combination with quantum mechanical calculations of the electronic circular dichroism (ECD) spectra, optical rotation, and 13C chemical shifts were used to establish the chemical structures of 1 and 2. Both compounds exhibited moderate antifungal activity against Cladosporium cucumerinum, while compound 2 was also active against Candida albicans. Marine natural products containing steroidal and amino acid constituents are extremely rare in nature.
    Type: Article , PeerReviewed
    Format: text
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 10
    Publication Date: 2019-09-23
    Description: Filamentous fungi are well known for their capability of producing antibiotic natural products. Recent studies have demonstrated the potential of antimicrobials with vast chemodiversity from marine fungi. Development of such natural products into lead compounds requires sustainable supply. Marine biotechnology can significantly contribute to the production of new antibiotics at various levels of the process chain including discovery, production, downstream processing, and lead development. However, the number of biotechnological processes described for large-scale production from marine fungi is far from the sum of the newly-discovered natural antibiotics. Methods and technologies applied in marine fungal biotechnology largely derive from analogous terrestrial processes and rarely reflect the specific demands of the marine fungi. The current developments in metabolic engineering and marine microbiology are not yet transferred into processes, but offer numerous options for improvement of production processes and establishment of new process chains. This review summarises the current state in biotechnological production of marine fungal antibiotics and points out the enormous potential of biotechnology in all stages of the discovery-to-development pipeline. At the same time, the literature survey reveals that more biotechnology transfer and method developments are needed for a sustainable and innovative production of marine fungal antibiotics.
    Type: Article , PeerReviewed
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...