12,108 research outputs found
A new species of Aleurolobus Quaintance et Baker (Homoptera, Aleyrodidae) from Southern Europe.
Get PDFAleurolobus 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
Rohanixalus senapatiensis Biju & Garg & Gokulakrishnan & Chandrakasan & Thammachoti & Ren & Gopika & Bisht & Hamidy & Shouche 2020, comb. nov.
No full textRohanixalus senapatiensis (Mathew and Sen, 2009) comb. nov. Senapati’s Bubble-nest Frog (Figs. 1–2, 4, 7, 17; Tables 1, 3, 4) Original name and description. Chirixalus senapatiensis Mathew and Sen, 2009. Mathew R. and Sen N. 2009. Studies on little known amphibians of Northeast India. Records of the Zoological Survey of India, Occasional Papers, 293: 1–64. Type. Holotype, VA/ERS/ZSII/804 (ZSIE 804), by original designation. Type locality. “Mabing river bed, Kangpokpi, Senapati district”, Manipur, India. Current status of specific name. Valid name as Rohanixalus senapatiensis (Mathew and Sen, 2009) comb. nov. Taxonomic remarks. In the original description, Mathew and Sen (2009) distinguished this species from the closely related Rohanixalus vittatus and R. shyamrupus mainly by its “Toes almost fully webbed” (vs. “Toes 3/4th webbed” in R. vittatus), and certain dorsal colour differences such as “dorsum uniform light brown” (vs. “speckled all over with purple” in R. vittatus) that are found to be variable among various species of Rohanixalus. These characters mentioned by the authors are also not found in the type of R. senapatiensis, especially fully webbed toes. Our examination of the holotype of Chirixalus senapatiensis also shows that it represents a member of the genus Rohanixalus, mainly due to the presence of characters such as dorsolateral stripes and dorsal spots. We have further confirmed the identity and generic placement of Rohanixalus senapatiensis (Mathew and Sen, 2009) comb. nov., both morphologically and phylogenetically, based on new topotypic and additional collections from Northeast India (Figs. 1, 2; Table 1). Diagnosis. Small-sized adults (male SVL 18–21 mm, female SVL 24–25 mm) with a slender body; snout nearly pointed in dorsal view; dorsal colouration light to dark brown with a reddish tinge; the entire dorsum, lateral surfaces, and dorsal surface of limbs covered with fine dark brown speckles, some speckles clumping together to form dark and irregular blotches on the dorsum; a dark continuous dorsolateral stripe starts from the tip of the snout, extends through the eye, and reaches close to the vent on either side; lateral surfaces of the head, including tympanic region, darker than dorsal colouration; foot webbing moderate, extending just above the second subarticular tubercle on either side of toe IV; eggs light green in colour and laid in bubble nests. Genetic divergence. For the mitochondrial 16S gene, Rohanixalus senapatiensis differs from other genetically known congeners (Fig. 1) by average uncorrected genetic distance of: 8.7–9.6% from R. baladika, 8.6–10.7% from R. hansenae, 3.0–3.4% from R. shyamrupus, and 9.0–10.1% from R. vittatus. Some previously sampled populations from the geographically close Putao district in Kachin state of Myanmar (‘ Feihyla vittata ’ Group I of Aowphol et al. 2013; R. cf. shyamrupus in the present study, Fig. 2) are related to R. senapatiensis by 2.8–3.2% divergence. Further studies are required to ascertain the identity of Putao populations, as well as two additional unidentified lineages (Rohanixalus sp. 1 and Rohanixalus sp. 2). For detailed intra-generic comparisons see Table 3. Distribution. Rohanixalus senapatiensis was originally described based on a single specimen from Kangpokpi in Senapati district of Manipur state, India. Based on subsequent surveys in Northeast India, this species is known from Tamenglong and Churachandpur districts of Manipur; Phek district of Nagaland; Mizoram; and Tripura. The previous report of R. vittatus from Mizoram by Deuti & Dutta (2002) is likely to represent R. senapatiensis, based on the available specimen (ZSI A 9209, from Ngengpuri Wildlife Sanctuary) at ZSI Kolkata.Published as part of Biju, S. D., Garg, Sonali, Gokulakrishnan, G., Chandrakasan, Sivaperuman, Thammachoti, Panupong, Ren, Jinlong, Gopika, C., Bisht, Karan, Hamidy, Amir & Shouche, Yogesh, 2020, New insights on the systematics and reproductive behaviour in tree frogs of the genus Feihyla, with description of a new related genus from Asia (Anura, Rhacophoridae), pp. 1-55 in Zootaxa 4878 (1) on pages 44-45, DOI: 10.11646/zootaxa.4878.1.1, http://zenodo.org/record/442457
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
Rohanixalus shyamrupus Biju & Garg & Gokulakrishnan & Chandrakasan & Thammachoti & Ren & Gopika & Bisht & Hamidy & Shouche 2020, comb. nov.
No full textRohanixalus shyamrupus (Chanda and Ghosh, 1989) comb. nov. Shyamrup’s Bubble-nest Frog (Figs. 1–2, 4, 7, 18–19; Tables 1, 3, 4) Original name and description. Philautus shyamrupus Chanda and Ghosh, 1989. Chanda S. K. and Ghosh A. K. 1989. A new frog of the genus Philautus Gistel, from the proposed Namdapha Biosphere Reserve, Arunachal Pradesh, northeast India. Journal of the Bombay Natural History Society, 86: 215–217. Type. Holotype, ZSIC A 7944 (formerly ZSI-KZ 313), by original designation. Type locality. “Hornbill, Namdapha Tiger Reserve”, Arunachal Pradesh, India. Current status of specific name. Valid name as Rohanixalus shyamrupus (Chanda and Ghosh, 1989) comb. nov. Taxonomic remarks. Chanda & Ghosh (1989) originally placed this species in the genus Philautus. The original description, as well as Chanda & Sarkar (1997), did not compare this taxon with any known Philautus species from Eastern Himalayas or neighbouring regions, other than with unrelated ranid species (Dubois 1999; Bossuyt & Dubois 2001). Based on the description and available photograph (Chanda & Sarkar 1997), Bossuyt & Dubois (2001) suggested that the species is not a member of Philautus due to characters such as longitudinal bands or lines on the body or flanks, smooth chest and belly, extensive webbing, and lack of inner and outer metatarsal tubercles. They provisionally transferred it to the genus Chirixalus, without stating any potentially close taxa. We examined the holotype of Philautus shyamrupus and found that it represents a member of the genus Rohanixalus due to characters such as the presence of dorsolateral stripes and dorsal spots. We have further confirmed the identity and generic placement of Rohanixalus shyamrupus (Chanda and Ghosh, 1989) comb. nov., both morphologically and phylogenetically, based on new topotypic and additional collections from Northeast India (Figs. 1, 2; Table 1). Diagnosis. Small-sized adults (male SVL 18–21 mm, female SVL 24–25 mm) with a slender body; snout nearly pointed in dorsal view; dorsal colouration light to dark brown with a reddish tinge; the entire dorsum, lateral surfaces, and dorsal surfaces of limbs covered with fine dark brown speckles, some speckles clumping together to form dark and irregular blotches on the dorsum; a dark and continuous dorsolateral stripe starts from the tip of the snout, extends through the eyes, and reaches close to the vent on either side; lateral surfaces of the head, including tympanic region, darker than dorsum; foot webbing moderate, just above the second subarticular tubercle on either side of toe IV. Further, the eggs are light green in colour and laid in bubble nests. Genetic divergence. For the mitochondrial 16S gene, Rohanixalus shyamrupus differs from other genetically known congeners (Fig. 1) by average uncorrected genetic distance of: 9.4–10.1% from R. baladika, 8.2–10.2% from R. hansenae, 3.0–3.4% from R. senapatiensis, and 8.6–10.1% from R. vittatus. Some previously sampled populations from the geographically close Putao district in Kachin state of Myanmar (‘ Feihyla vittata ’ Group I of Aowphol et al. 2013; R. cf. shyamrupus in the present study, Fig. 1) are related to R. shyamrupus by 2.8% divergence. Further studies are required to ascertain the identity of Putao populations, as well as two additional unidentified lineages (Rohanixalus sp. 1 and Rohanixalus sp. 2). For detailed intra-generic comparisons see Table 3. Distribution. Rohanixalus shyamrupus was originally described from Changlang district in the state of Arunachal Pradesh, India. In the present study, we genetically confirm the identity and phylogenetic relationship of the species based on topotypes from Namdapha Tiger Reserve, Changlang district. Additionally, this species is known from West Kameng district in Arunachal Pradesh; and Kohima and Peren districts of Nagaland. Previous reports of R. vittatus from Nagaland (Romer 1951 “1949”; Kiyasetuo & Khare 1986) are likely to refer to this species.Published as part of Biju, S. D., Garg, Sonali, Gokulakrishnan, G., Chandrakasan, Sivaperuman, Thammachoti, Panupong, Ren, Jinlong, Gopika, C., Bisht, Karan, Hamidy, Amir & Shouche, Yogesh, 2020, New insights on the systematics and reproductive behaviour in tree frogs of the genus Feihyla, with description of a new related genus from Asia (Anura, Rhacophoridae), pp. 1-55 in Zootaxa 4878 (1) on page 45, DOI: 10.11646/zootaxa.4878.1.1, http://zenodo.org/record/442457
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
Screening of biodiesel production from waste tuna oil (Thunnus sp.), seaweed Kappaphycus alvarezii and Gracilaria sp.
Get PDFBiodiesel 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)
Get PDFA 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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