25,872 research outputs found
New bryophyte taxon records for tropical countries 4
Nord Kivu: c. 6 km north of Lubero, on sandy soil of tree-shaded road cutting, c. 1800m, 0º 8' S, 29º 14' E, 11 Aug 1988. C.R. Stevenson Z 78f, det. E.W. Jones (BM, & herb. C.R. Stevenson). Growing mixed with Frullania serrata, Pilotrichella, Trachypodopsis, etc. Distrib.: Annobon, Bioko, Burundi, Cameroun, Kenya, Rwanda, Sao Tome, Tanzania
Naturwissenschaftliche Reise nach Mossambique : auf Befehl seiner Majestät des Königs Friedrich Wilhelm IV. in den Jahren 1842 bis 1848 ausgeführt
Bände: Zoologie I : Säugethiere : mit sechs und vierzig Tafeln : 1852 Zoologie II : Vögel : 15 Tafeln [ca. 1860] Zoologie III : Amphibien : mit drei und dreissig Tafeln, 1882 Zoologie IV : Flussfische : mit zwanzig Kupfertafeln, 1868 Zoologie V : Insecten und Myriopoden : mit fünf und dreissig Kupfertafeln, 1862 Botanik I. Abtheilung : mit acht und vierzig Tafeln, 1862 Botanik II. Abtheilung : mit dreizehn Tafeln, 186
Botanik
Taha Toros Arşivi, Dosya No: 210-Köprülü Soyadlılar, Fuat Köprülüİstanbul Kalkınma Ajansı (TR10/14/YEN/0033) İstanbul Development Agency (TR10/14/YEN/0033
Zafar, Capital of Himyar, Sixth Preliminary Report, February–March 2006
Die Grabungsmannschaft der Universität Heidelberg untersucht Zafar – Hauptstadt der himyarischen Stammeskonföderation – seit 1998. Dieses interdisziplinäre Projekt erbrachte Funde in der Kunstgeschichte, Botanik und Chronologi
Higher yields of cyclodepsipetides from Scopulariopsis brevicaulis by random mutagenesis
The ascomycete Scopulariopsis brevicaulis, which was isolated from the marine sponge
Tethya aurantium, produces two cyclodepsipeptides, scopularides A and B [1]. Both peptides
exhibit activity against several tumor cell lines. Within the EU-project MARINE FUNGI (EU
FP7, 265926) one of our aims is to enhance the production of these secondary metabolites.
We are in the process to establish two ways of random mutagenesis by both UV radiation
and transposon-mediated. To this end we created UV-mutants and a miniaturised screening
method was developed. UV-radiation was performed at 312 nm and the survival rate was set
to 1 %. With this method a mutant library was established. To screen these mutants for
higher secondary metabolites production, we developed a miniaturised screening method
which includes decreased cultivation volume, fast extraction and an optimised LC-MS
analysis format. Using the UV mutagenesis, we were able to identify several mutants with a
higher scopularide production in comparison to the wild type. One of these mutants, which
produces three times more biomass and more than double the amount of scopularide A, has
been used for another round of mutation. Next generation sequencing is being employed to
identify the molecular genetic basis of the observed mutations. In parallel we employ
transposable elements to introduce mutants [2]. The impact of transposons on gene
expression as well as their ability to cause major mutations within the genome or single
genes makes them an interesting tool for random mutagenesis [3, 4, 5]. We employ the
Vader transposon in its homologous host and found that Vader mostly integrates within or
very close to genes. Thus it appears to be a useful tool for transposon-mediated
mutagenesis in A. niger (6). At current we try to enhance its usability by modifying the Vader
element
Cephaloziella biokoensis sp. nov. (Marchantiopsida, Cephaloziellaceae), from the island of Bioko (Equatorial Guinea)
A new species, Cephaloziella biokoensis Vá a & F.Müller, is described and illustrated. The type locality is at the highest point of the island of Bioko (Equatorial Guinea) at an altitude of ca. 2900 m NN. The new species belongs to subgenus Prionolobus (Spruce) Müll.Frib. and is closely related to C. turneri (Hook.) Müll.Frib. The main differences between these two species are shown in a table
The marine macroalgae of Cabo Verde archipelago : an updated checklist
An updated list of the names of the marine macroalgae of Cabo Verde, an archipelago of ten volcanic islands in the central Atlantic Ocean, is presented based on existing reports, and includes the addition of 36 species. The checklist comprises a total of 372 species names, of which 68 are brown algae (Ochrophyta), 238 are red algae (Rhodophyta) and 66 green algae (Chlorophyta). New distribution records reveal the existence of 10 putative endemic species for Cabo Verde islands, nine species that are geographically restricted to the Macaronesia, five species that are restricted to Cabo Verde islands and the nearby Tropical Western African coast, and five species known to occur only in the Maraconesian Islands and Tropical West Africa. Two species, previously considered invalid names, are here validly published as Colaconema naumannii comb. nov. and Sebdenia canariensis sp. nov.The present work was generated in the context of the Project PADDLE - Planning in the liquid world with tropical stakes, funded by the European Union’s Horizon 2020 Research and Innovation Programme under Grant 734271. DG was supported with the FCT postdoctoral grant SFRH/BPD/64963/2009. CIBIO-Açores is maintained with Portuguese (UID/BIA/50027/2013) and Azorean (POCI-01-0145-FEDER-006821) funding.info:eu-repo/semantics/publishedVersio
Control of the woolly apple aphid (Erisoma lanigerum Hausm.) by releasing earwigs (Forficula auricularia L.) and support oil applications - an interim report of first year results
The woolly apple aphid (Erisoma lanigerum Hausm.) has been recognised for some years as
a serious pest in organic fruit growing where they may cause severe economic damage due
to a lack of control strategies. Based on preliminary results a new project has been started in
2007 testing combinations of releasing earwigs and oil applications in order to develop an onfarm
control strategy. In this paper we present preliminary results of the first year of the
project´s field trials. They showed good efficacies for applying oil preparations by brush. The
efficacy of releasing earwigs depended on the infestation intensity
Bryophytes from the Republic of Equatorial Guinea (West Central Africa) : 4., notes on some nomina nuda from Annobon
Eight moss species corresponding to nomina nuda recorded in the literature from Annobon Island are listed with their recent determination and current names. Leucophanes unguiculatum, Philonotis uncinata var. glaucescens and Vesicularia strephomischos are new records for the Equatorial Guinean bryoflora.Se citan con su identificación correcta y sus nombres actuales ocho especies de musgos procedentes de la isla de Annobón y registrados en la bibliografía como nomina nuda. Leucophanes unguiculatum, Philonotis uncinata var. glaucescens y Vesicularia strephomischos son nuevos registros para la brioflora de la República de Guinea Ecuatorial
- …
