12,284 research outputs found
A new species of Aleurolobus Quaintance et Baker (Homoptera, Aleyrodidae) from Southern Europe.
No full textAleurolobus teucrii n. sp. is described from southern Italy and the Maltese Islands (Central Mediterranean). The species seems to be monophagous on Teucrium fruticans L. A key to the European species of this genus (A. niloticus Priesner et Hosny, A. olivinus (Silvestri), A. wunni (Ryberg) and A. teucrii n. sp.) is provided.peer-reviewe
Mosquito Larvicidal Constituents from Lantana Viburnoides SP Viburnoides Var Kisi (A. rich) Verdc (Verbenaceae).
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Lantana viburnoides sp viburnoides var kisi is used in Tanzania ethnobotanically to repel mosquitoes as well as in traditional medicine for stomach ache relief. Bioassay-guided fractionation and subtraction bioassays of the dichloromethane extract of the root barks were carried out in order to identify the bioactive components for controlling Anopheles gambiae s.s. mosquito larvae. Twenty late III or early IV instar larvae of An. gambiae s.s. were exposed to various concentrations of the plant extracts, fractions, blends and pure compounds, and were assayed in the laboratory by using the protocol of WHO 1996. Mean mortalities were compared using Dunnett's test (p < 0.05) and lethal concentration calculated by Lackfit Inversel of the SAS programme. The crude extract (LC50 = 7.70 ppm in 72 h) and fractions exhibited different level of mosquito larvicidal activity with subtraction of some fractions resulting in activity enhancement. The active fractions contained furanonaphthaquinones regio-isomers (LC50 = 5.48-5.70 ppm in 72 h) and the lantadene triterpenoid camaric acid (LC50 = 6.19 ppm in 72 h) as active principles while the lupane triterpenoid betulinic acid (LC50 < 10 ppm in 72 h) was obtained from the least active fraction. Crude extracts and some fractions had higher or comparable larvicidal activity to the pure compounds. These results demonstrate that L. viburnoides sp viburnoides var kisi extracts may serve as larvicides for managing various mosquito habitats even in their semi-purified form. The isolated compounds can be used as distinct markers in the active extracts or plant materials belonging to the genus Lantana
Thermotoga lettingae sp. nov., a novel thermophilic, methanol-degrading bacterium isolated from a thermophilic anaerobic reactor
No full textA novel, anaerobic, non-spore-forming, mobile, Gram-negative, thermophilic bacterium, strain TMO(T), was isolated from a thermophilic sulfate-reducing bioreactor operated at 65 degrees C with methanol as the sole substrate. The G C content of the DNA of strain TMO(T) was 39.2 molÐThe optimum pH, NaCl concentration, and temperature for growth were 7.0, 1.0°and 65 degrees C, respectively. Strain TMO(T) was able to degrade methanol to CO(2) and H(2) in syntrophic culture with Methanothermobacter thermautotrophicus DeltaH or Thermodesulfovibrio yellowstonii. Thiosulfate, elemental sulfur, Fe(III) and anthraquinone-2,6-disulfonate were able to serve as electron acceptors during methanol degradation. In the presence of thiosulfate or elemental sulfur, methanol was converted to CO(2) and partly to alanine. In pure culture, strain TMO(T) was also able to ferment methanol to acetate, CO(2) and H(2). However, this degradation occurred slower than in syntrophic cultures or in the presence of electron acceptors. Yeast extract was required for growth. Besides growing on methanol, strain TMO(T) grew by fermentation on a variety of carbohydrates including monomeric and oligomeric sugars, starch and xylan. Acetate, alanine, CO(2), H(2), and traces of ethanol, lactate and alpha-aminobutyrate were produced during glucose fermentation. Comparison of 16S rDNA genes revealed that strain TMO(T) is related to Thermotoga subterranea (98€and Thermotoga elfii (98Ž The type strain is TMO(T) (=DSM 14385(T)=ATCC BAA-301(T)). On the basis of the fact that these organisms differ physiologically from strain TMO(T), it is proposed that strain TMO(T) be classified as a new species, within the genus Thermotoga, as Thermotoga lettingae
Multiscalar Narrative Identities: Individual and Nation, Europe and Eurasia
No full textThe paper explores narratives of identity on multiple scales between the individual and the Eurasian landmass, taking the various identities of Cracow‑born anthropologist Bronisław Malinowski as a leitmotiv to illustrate the main arguments. Apart from being a cultural Pole and an Austrian (later British) subject, Malinowski was a typical European intellectual of his age. At the end of his life in the United States, he appealed to the values of European civilization to overcome the Nazi horrors. Subjectively he identified strongly with Poland, even though his career was built elsewhere. We could say that Poland was his Gemeinschaft. Although we can only speculate on what he would say today about neoliberal political economy and the construction of an ever more rigorously demarcated ‘Fortress Europe’, the author argues that Malinowski’s emphasis on the values of European civilization was ethnocentric. It is important to correct Eurocentrism by recognizing the commonalities of civilizations across the Eurasian landmass.</jats:p
Data Science Education: The Signal Processing Perspective [SP Education]
No full textIn the last decade, the signal processing (SP) community has witnessed a paradigm shift from model-based to data-driven methods. Machine learning (ML) - more specifically, deep learning - methodologies are nowadays widely used in all SP fields, e.g., audio, speech, image, video, multimedia, and multimodal/multisensor processing, to name a few. Many data-driven methods also incorporate domain knowledge to improve problem modeling, especially when computational burden, training data scarceness, and memory size are important constraints.Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.Signal Processing System
Ożeż ty!, polszczyzno : wątpliwości użytkowników języka, wyjaśnienia lingwistyczne
No full textOH YOU!, POLISH LANGUAGE: DOUBTS OF POLISH LANGUAGE USERS, LINGUISTIC EXPLANATIONS
This is an academic publication, which is a selection of specially written, elaborated (footnotes, a bibliography, a list of online sources, and a word index) and edited texts, then subjected to academic review, which appeared in a popular-science column on various aspects of correctness in Polish in the nationwide weekly Angora from 2019 to the first half of 2022.
All the author’s considerations and reflections on the most important lexical and grammatical phenomena in contemporary Polish were inspired by readers’ questions. These posed a considerable intellectual challenge for the author, sometimes forcing him to explore the deepest layers of earlier and more recent Polish.
The author takes great care to address every linguistic issue raised earlier by the readers in its explanation, referring to scholarly literature and dictionaries, and, when necessary, citing the opinions of lexicographers and linguistic experts on a given topic.
At the same time, he firmly believes that linguistic prescription makes sense only when the solution to a given linguistic dilemma is presented against a broader background revealing the mechanisms governing the Polish language. It may happen, after all, that a verdict of prescriptivists from years ago does not fit the contemporary reality. And is it then really necessary to insist that something is correct or not, while language use, or established linguistic custom, contradicts it?
Worthy of note is the title of the publication. It features the word ożeż written jointly and twice with ż. This is because, either alone or in combination with the pronoun ty ‘you’, it creates an expressive exclamation, that is, one in which there are two emphatic particles, although the second of them appears in a form reduced to ż, without e, because it stands after the vowel. Unfortunately, most of those who write about this orthographic norm do not know and have never heard of this, and therefore misspell the expression as o żesz
Screening of biodiesel production from waste tuna oil (Thunnus sp.), seaweed Kappaphycus alvarezii and Gracilaria sp.
No full textBiodiesel has several advantages over solar. Compared to solar, biodiesel has more eco-friendly characteristic
and produces lower greenhouse gas emissions. Biodiesel that is made from animal fats can be produced from fish oil,
while other alternative sources from vegetable oils are seaweed Kappaphycus alvarezii and Gracilaria sp. Waste tuna oil
(Thunnus sp.) in Indonesia is commonly a side product of tuna canning industries known as tuna precook oil; on the other
hand, seaweed Gracilaria sp. and Kappaphycus alvarezii are commonly found in Indonesia’s seas. Seaweed waste that
was used in the present study was 100 kg and in wet condition, and the waste oil was 10 liter. The seaweed was extracted
with soxhletation method that used n-hexane as the solvent. To produce biodiesel, trans esterification was performed on
the seaweed oil that was obtained from the soxhletation process and waste tuna oil. Biodiesel manufactured from
seaweed K. alvarezii obtained the best score in flash point, freezing point, and viscosity test. However, according to level
of manufacturing efficiency, biodiesel from waste tuna oil is more efficient and relatively easier compared to biodiesel
from waste K. alvarezii and Gracilaria sp
Fig. 6. (a) Streptomyces sp. strain AF1 (left, Author collection) and (b) Streptomyces rochei strain AB1 (right, compared to [24])
No full textStreptomyces sp. strain AF1 (left, Author collection) and (b) Streptomyces rochei strain AB1 (right, compared to [24]
Battle of powers: Brazil: from democratic transition to constitutional resilience
No full textIn the context of strong political polarization, intensification of distributive conflicts and clashes among powers - which have permeated Brazilian political life in the last decade - , the country has experienced profound constitutional malaise. Oscar Vilhena Vieira provides us in this book with an analysis of the Brazilian institutional crises with sobriety and erudition. An acute observer of the process of constitutionalization of the Brazilian political life, the author points to the fundamental role of consensual political model adopted by the 1988 Constitution to enable and defend the rules of the democratic order
Nesticus baeticus sp. n., a new troglobitic spider species from south-west Europe (Araneae, Nesticidae)
No full textA new troglobitic species, Nesticus baeticus sp. n. (♂♀), inhabiting the karst landscapes of the high part of the Cazorla, Segura and Las Villas Natural Park (NE Jaén, Spain) where it has been found in 8 caves is diagnosed and described, its distribution and habitat are also analyzed.The new species belongs to the Iberian species group that includes Nesticus luquei, Nesticus lusitanicus and Nesticus murgis. Evolutionary relationships of the Iberian Nesticus species are discussed on the basis of morphological and molecular data (cox1 and rrnL). Arachnida, Araneae, taxonomy, description, new species, caves, Iberian Peninsula, Mediterranean basi
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