Macroalgae must be able to survive in conditions of different light intensities with no damage to their physiological performance or vital processes. Irradiance can stimulate the biosynthesis of certain photoprotective compounds of biotechnological interest, such as pigments and proteins. Pterocladiella capillacea is a shade-grown alga, which play a role key in the balance of marine ecosystems. In addition, it is considered one of the best sources of bacteriological agar and agarose with a wide pharmacological potential. In order to evaluate the photosensitivity in P. capillacea under 60 (control) and moderate light intensity of 300 μmol(photon) m-2 s-1, photosynthetic performance and chemical composition were assessed. P. capillacea showed photosensitivity without evidence of photodamage. The results indicate the possibility to increase a growth rate and probably infer productivity in long-term cultivation by stimulation at moderate light intensity. Increasing photosynthetic pigment and protein contents were also observed under medium light, an interesting result for functional ingredient approaches., T. B. Harb, A. Nardelli, F. Chow., and Obsahuje bibliografii
Contains linguistic annotated data from the Online-Forum PC Games (https://forum.pcgames.de). The forum is concerned about gaming. All posts (approx. 2.4 mio) where scraped in April 2019 (details see Kissling 2019), resulting in 120 mio tokens of almost 70'000 authors. The data is saved in a SQL-database and can be accessed using eg. pg_restore. The database itself and the tables of the database contain detailed self-descriptions.
In this database you find tokenized, part-of-speech-tagged and party lemmatized information of every token in the forum and its metadata (usernames and their location in the forum structure, e.g. which post(s), thread, subforum it belongs to). The order of the words in a post cannot be reconstructed with this corpus. Usernames were replaced with author_ids to protect the personal rights of the post authors.
Additional information:
As this corpus was analyzed in terms of productivity and language contact of German and English (Kissling 2020), there is additional information about German base forms found in present day English, mainly focussing on the formula "German_verb_stem + -en = English verb infinitive". Therefore the API of the Oxford Dictionary of English was used. You will find the results of the API request done with Oxford Dictionary of English in the table infinitives. The corpus can be used without using this information, too.
Calculations were performed at sciCORE (http://scicore.unibas.ch/) scientific computing core facility at University of Basel on 2019-09-10. This database contains all of the primary corpus of Kissling (2020).
Sources:
Kissling, J. (2019). Computerunterstütztes Verfahren zur Erhebung eigener Textkorpus-Daten. Methodenentwicklung und Anwendung auf 2.4 Mio. Posts des Forums PC Games.de [certification thesis]. Universität Basel.
Kissling, J. (2020). Produktivität englischer Verben im Deutschen [master thesis]. Universität Basel.
The used scraper is available on github: https://github.com/vizzerdrix55/web-scraping-vBulletin-forum
In order to test the effects of irrigation depth on winter wheat photosynthesis, four treatments were applied in a field experiment using PVC growth tubes (identical amounts of water were applied on the land surface, and at 60, 75, and 90% of the depth for the winter wheat root distribution, denoted as D0, D60, D75, and D90, respectively). Compared to the surface irrigation treatment D0, the leaf area index, chlorophyll content, net photosynthetic rate, transpiration rate, stomatal conductance, and intercellular CO2 concentration increased with irrigation depths. The values of these indicators obtained by the underground irrigation treatment D75 were higher than those of D60 and D90, and thus D75 was found to be the optimum irrigation depth. Furthermore, a positive but not significant correlation (r = 0.62) between carbon isotope discrimination (Δ13C) and grain yield was found. This study improves our understanding of the mechanism of underground water distribution control with depth, and the efficiency of
water-saving irrigation for winter wheat., L. J. Zheng, J. J. Ma, X. H. Sun, X. H. Guo, J. Jiang, R. Ren, X. L. Zhang., and Obsahuje bibliografii
Semi-dry grasslands in the White Carpathian (Bílé Karpaty) Mountains on the Czech-Slovak border are famous for their extremely high species richness. In places they contain more than 130 species of vascular plants per 100m2 and for some plot sizes they hold world records in the number of vascular plant species, but the reasons for this are poorly understood. Here we ask whether the high number of species in these grasslands can be explained by local ecological factors. We compared the White Carpathian grasslands with similar grasslands in adjacent areas in the west (southern Moravia) and the east (Inner Western Carpathians), which are on average notably poorer in species than those in the White Carpathians. In both of these areas, we sampled grasslands that were among the species richest in the regional context and had a similar physiognomy, species composition and ecology as those in the White Carpathians. We found 75 sites with >70 and >25 species of vascular plants per 100 m2 and 1 m2, respectively, in which we recorded species composition and local environmental conditions, including precipitation, soil depth, soil pH and nutrient concentrations, above-ground biomass production and nutrients in plant biomass. Although the White Carpathian grasslands were considerably richer in species than the richest grasslands in the adjacent regions, there were no differences in the values of the factors studied that could provide an unequivocal explanation of their high species richness. However, the values of the factors studied were within the ranges reported in the literature as conducive to high species richness in temperate grasslands. We conclude that the high species richness recorded in the White Carpathian grasslands cannot be explained by a single factor. It results from a unique combination of regional factors (long history of these grasslands, large size of individual grassland areas and their existence in a landscape mosaic with forests, scrub and small wetlands), local abiotic factors (soil pH, soil nutrient status, moisture regime and resulting grassland productivity that are suitable for many species from the regional species pool) and management (low fertilizer input and mowing once a year in late spring or summer).