105,441 research outputs found
Ni-based water photocatalysts for hydrogen evolution, and physical mechanism behind photocatalysis
No full textAbstract
This doctoral thesis is dedicated to the exploration and enhancement of Nibased water photocatalysts, with a focus on their potential for efficient hydrogen evolution and unraveling the underlying physical mechanisms governing photocatalysis. The primary focus is on the utilization of commercial Ni@NiO/NiCO3 with varied sizes, subjected to vacuum annealing thermal treatment to enhance their photocatalytic properties. Additionally, the incorporation of Ag as a buffer element, facilitates the attachment of Ni to multilayered MoS2, resulting in the formation of a MoS2 -Ag-Ni ternary composite. Furthermore, the synthesis of hierarchical Nickel carbonate hydroxide via the hydrothermal method is investigated. A comprehensive characterization of the synthesized materials is carried out using various microscopic techniques (SEM, TEM, HRTEM, etc.) and spectroscopic tools (UV-vis, XPS, XRD, EDS, etc.) to provide detailed insights into the structural and chemical composition of the materials. The synthesized materials are then subjected to photocatalytic water splitting experiments, wherein hydrogen production under visible light irradiation is investigated. The outcomes of this research not only contribute to the advancement of Ni-based photo catalysts but also enhance our understanding of the complicated interplay between material structures and their photocatalytic performance. Original papers Talebi, P., Singh, H., Rani, E., Huttula, M., & Cao, W. (2021). Surface plasmon-driven photocatalytic activity of Ni@NiO/NiCO3 core–shell nanostructures. RSC Advances, 11(5), 2733–2743. https://doi.org/10.1039/D0RA09666K. https://doi.org/10.1039/D0RA09666K Self-archived version Talebi, P., Kistanov, A. A., Rani, E., Singh, H., Pankratov, V., Pankratova, V., King, G., Huttula, M., & Cao, W. (2022). Unveiling the role of carbonate in nickel-based plasmonic core@shell hybrid nanostructure for photocatalytic water splitting. Applied Energy, 322, 119461. https://doi.org/10.1016/j.apenergy.2022.119461. https://doi.org/10.1016/j.apenergy.2022.119461 Self-archived version Talebi, P., Rani, E., Niu, Y., Zakharov, A., & Cao, W. (2023). Spectromicroscopic determinations of chemical environments of Ni in MoS2‐Ag‐Ni ternary systems. X-Ray Spectrometry, 52(1), 38–45. https://doi.org/10.1002/xrs.3314. https://doi.org/10.1002/xrs.3314 Talebi, P., Greco, R., Yamamoto, T., Zeynali, M., Asgharizadeh, S., & Cao, W. (2024). Hierarchical nickel carbonate hydroxide nanostructures for photocatalytic hydrogen evolution from water splitting. Materials Advances, 5(7), 2968–2973. https://doi.org/10.1039/D3MA00977G. https://doi.org/10.1039/D3MA00977G Self-archived version Osajulkaisut Talebi, P., Singh, H., Rani, E., Huttula, M., & Cao, W. (2021). Surface plasmon-driven photocatalytic activity of Ni@NiO/NiCO3 core–shell nanostructures. RSC Advances, 11(5), 2733–2743. https://doi.org/10.1039/D0RA09666K. https://doi.org/10.1039/D0RA09666K Rinnakkaistallennettu versio Talebi, P., Kistanov, A. A., Rani, E., Singh, H., Pankratov, V., Pankratova, V., King, G., Huttula, M., & Cao, W. (2022). Unveiling the role of carbonate in nickel-based plasmonic core@shell hybrid nanostructure for photocatalytic water splitting. Applied Energy, 322, 119461. https://doi.org/10.1016/j.apenergy.2022.119461. https://doi.org/10.1016/j.apenergy.2022.119461 Rinnakkaistallennettu versio Talebi, P., Rani, E., Niu, Y., Zakharov, A., & Cao, W. (2023). Spectromicroscopic determinations of chemical environments of Ni in MoS2‐Ag‐Ni ternary systems. X-Ray Spectrometry, 52(1), 38–45. https://doi.org/10.1002/xrs.3314. https://doi.org/10.1002/xrs.3314 Talebi, P., Greco, R., Yamamoto, T., Zeynali, M., Asgharizadeh, S., & Cao, W. (2024). Hierarchical nickel carbonate hydroxide nanostructures for photocatalytic hydrogen evolution from water splitting. Materials Advances, 5(7), 2968–2973. https://doi.org/10.1039/D3MA00977G. https://doi.org/10.1039/D3MA00977G Rinnakkaistallennettu versio Academic Dissertation to be presented with the assent of the Faculty of Science, University of Oulu, Finland for public discussion in the Auditorium L5, on June 13th, 2024, at 12 o’clock (EEST) noon.Abstract
This doctoral thesis is dedicated to the exploration and enhancement of Nibased water photocatalysts, with a focus on their potential for efficient hydrogen evolution and unraveling the underlying physical mechanisms governing photocatalysis. The primary focus is on the utilization of commercial Ni@NiO/NiCO3 with varied sizes, subjected to vacuum annealing thermal treatment to enhance their photocatalytic properties. Additionally, the incorporation of Ag as a buffer element, facilitates the attachment of Ni to multilayered MoS2, resulting in the formation of a MoS2 -Ag-Ni ternary composite. Furthermore, the synthesis of hierarchical Nickel carbonate hydroxide via the hydrothermal method is investigated. A comprehensive characterization of the synthesized materials is carried out using various microscopic techniques (SEM, TEM, HRTEM, etc.) and spectroscopic tools (UV-vis, XPS, XRD, EDS, etc.) to provide detailed insights into the structural and chemical composition of the materials. The synthesized materials are then subjected to photocatalytic water splitting experiments, wherein hydrogen production under visible light irradiation is investigated. The outcomes of this research not only contribute to the advancement of Ni-based photo catalysts but also enhance our understanding of the complicated interplay between material structures and their photocatalytic performance
Premicrodispus spinosus Hosseininaveh & Hajiqanbar & Talebi 2014, sp. nov.
No full textPremicrodispus spinosus Hosseininaveh & Hajiqanbar sp. nov. (Figures 6–10) Description Female. Length of idiosoma 152 (152–156), width 80 (74–88). Gnathosoma (Figure 8A,B). Gnathosomal capsule about twice as long as its width, dorsally with one pair of cheliceral setae ch 3 (3–3); ventrally with one pair of subcapitular seta su 5 (4–5); palps short, terminated to small tibial claw, and compressed to gnathosomal capsule, with two pairs of setae, dFe 3 (3–4) and dGe 4 (3–4), cheliceral stylets indiscernible; pharyngeal system (Figure 8C) with three pumps, pump 1 reduced, pump 2 the largest and striated, pump 3 small and rounded. Idiosomal dorsum (Figure 6). Stigmata oval-shaped and situated in anterior part of prodorsal shield; all dorsal setae smooth and pointed except setae d, f and h 1, which are blunt-ended; prodorsal shield with one pair of capitate trichobothria and one pair of setae sc 2 19 (18–19); all tergites smooth, tergite C with two pairs of setae c 1 11 (11–13) and c 2 15 (13–15), setae c 2 longer than c 1, posterior border of tergite C with distinct median depression; tergite D with seta d 9 (9–10) and one pair of rhombic cupuli ia, posterior border of tergite D with distinct median depression; tergite EF with two pairs of setae e 10 (10–11) related to one thin apodeme and f 10 (10–11); tergite H with two pairs of setae h 1 10 (10–11), h 2 11(11–12) and one pair of rhombic cupuli ih. Distances between dorsal idiosomal setae: sc 2 – sc 2 26 (25–26), c 1 – c 1 25 (25–26), c 2 – c 2 57 (50–60), c 1 – c 2 17 (17–20), d–d 24 (24–26), e–e 41 (41–44), e–f 5 (5–6), f–f 31 (31–35), h 1 – h 1 12 (11–13), h 1 – h 2 12 (11–12), h 2 – h 2 36 (36–39). Idiosomal venter (Figure 7). Ventral plates smooth; all ventral setae smooth and pointed; apodemes 1 and 2 reaching to appr, appr not reaching to apsej, apodemes 3 extending beyond bases of setae 3 a, apodemes 4 short and not reaching to bases of setae 3 b, apodemes 5 short; anterior border of poststernal plate convex and posterior border of poststernal plate tripartite; coxal field I with two pairs of setae 1 a 10 (9–10) and 1 b 10 (10–11); coxal field II with two pairs of setae 2 a 11 (11–12) and 2 b 14 (13– 15), 2 b longer than 2 a; coxal field III with three pairs of setae 3 a 10 (9–10), 3 b 7 (7–8) and 3 c 7 (7–10), 3 b and 3 c subequal and shorter than 3 a; coxal field IV with two pair of setae 4 b 8 (8–9) and 4 c 7 (7–8); pseudanal segment PS with three pairs of setae ps 1 11 (10–11), ps 2 6 (5–6) and ps 3 18 (16–18), ps 3 distinctly longer than ps 1 and ps 2. Legs. Leg chaetotaxy as in previous species. Leg I (Figure 9A). Tibiotarsus with solenidia ω 1 5 (4–5), ω 2 1 (1–2), φ 1 2 (1–2), and φ 2 4 (3–4), all finger shaped, ω 1 and φ 1 striated, with five eupathidial setae (p ″ , ft ′ , ft ″ , tc ′ , tc ″ ), setae tc ′ longest on leg I, setae pl ″ and pl ′ subequal, setae pv ′ longer than pv ″ , setae v ″ longer than v ′ , setae l ′ and l ″ subequal; genu with setae l ″ , l ′ , v ′ and v ″ , all subequal; femur with setae d and v ″ subequal and both longer than l ′ ; trochanter with seta v ′ . Leg II (Figure 9B). Tarsus with solenidion ω 3 (2–3) finger shaped, pl ″ modified and spine-like, the rest of setae of the segment subequal; tibia with a small finger-shaped solenidion φ 2 (1–2), setae l ′ modified and spine-like, setae d longer than v ′ and v ″ ; genu with setae, l ″ and v ′ subequal and longer than l ′ ; femur with setae d longer than l ′ and v ″ ; trochanter with seta v ′ . Leg III (Figure 10A). Tarsus with modified and spine-like setae pl ″ and tc ′ , setae tc ″ longest setae on the leg, setae pv ″ and pv ′ subequal and shorter than u ′ ; tibia with a small solenidion φ 2 (1–2) and setae d modified and spine-like, seta v ″ and v ′ subequal and longer than l ′ ; genu with setae l ′ and v ′ subequal; femur divided into basifemur and telofemur, setae d and l ′ inserted on telofemur, setae d longer than l ′ ; trochanter with seta v ′ . Leg IV (Figure 10B). Tarsus with subequal setae pl ″ , pv ′ and pv ″ , setae u ′ and tc ″ subequal, seta tc ′ longest on the segment; tibia with small solenidion φ 1 (1–1), seta d and v ′ subequal and longer than l ′ and v ″ ; genu with seta v ′ as long as femoral seta v ′ ; femur divided into basifemur and telofemur, setae d and v ′ inserted on telofemur, seta d longer than v ′ ; trochanter with seta v ′ . Male and larva unknown. Differential diagnosis The new species is readily distinguished from other species of the genus by some spine-like setae on tarsi and tibiae II and III. Other species of the genus Premicrodispus have unmodified setae on these segments. Disregarding this character, the new species is similar to Premicrodispus tenuisetus Khaustov, 2006 but differs from it by setae d blunt and not extending to posterior border of tergite D (seta d pointed and extending to posterior border of tergite D in P. tenuisetus) and setae f and h 1 blunt (setae f and h 1 pointed in P. tenuisetus). Type material Five females found in a vial containing the beetle Corticeus unicolor (Col: Tenebrionidae) in 75% ethanol. The host beetle was collected from oak trees in Naharkhoran forest, Golestan province, northern Iran, 36.46° N, 54.27° E, and altitude 450 m., coll. V. Rahiminejad, 30 July 2010. Etymology The species epithet refers to some spine-like setae on tarsi and tibiae II and III. Key to subgenera and Palaearctic species of the genus Premicrodispus (females) (modified from Khaustov 2006) 1. Genu I with four setae, genu II with three setae............................................... 2 - Genu I with three setae, genu II with one seta.................................................................... subgenus Premicrodispulus, P. reductus Khaustov and Chydyrov, 2010 2. Coxal fields I with two pairs of setae, pharyngeal pump 2 much longer than pharyngeal pump 3..................................................... subgenus Premicrodispus 3 - Coxal fields I with one pair of setae, pharyngeal pump 2 distinctly shorter than pharyngeal pump 3.............................................................................................................. subgenus Premicrodispoides, P. punctatus Khaustov and Maslov, 2013 3. Setae 4 a present................................................................................................. 4 - Setae 4 a absent.................................................................................................. 8 4. Setae ps 2 present....................................................... P. stenops (Mahunka, 1969) - Setae ps 2 absent................................................................................................. 5 5. Bases of setae f associated with well-developed apodeme..................................... ................................................................................. P. lineatus (Mahunka, 1986) - Apodemes associated with bases of setae f absent............................................. 6 6. Setae ps 1 distinctly longer than ps 3............................................................................................................... P. dzumaevi (Sevastianov and Chydyrov, 1991) - Setae ps 1 and ps 3 subequal in length.................................................................. 7 7. Setae d distinctly longer than distance between their bases, bases of setae e without apodemes.............................................................. P. paramaevi sp. nov. - Setae d distinctly shorter than distance between their bases, bases of setae e with apodemes................................................................ P. parasilvestris (Rack, 1974) 8. Setae ps 2 present................................................................................................ 9 - Setae ps 2 absent............................................................................................... 12 9. Setae h 2 distinctly shorter than h 1............................................................................................................... P. akermanae (Sevastianov and Zahida Al Douri, 1988) - Setae h 2 subequal or longer than h 1................................................................. 10 10. Setae h 1 much shorter than h 2, pseudanal setae distinctly shorter than setae of posterior sternal plate.................................................................................................................... P. subvarsoviensis (Mahunka and Zyromska-Rudska, 1975) - Setae h 1 and h 2 subequal, pseudanal setae and setae of posterior sternal plate subequal........................................................................................................... 11 11. Setae h 1, d and f blunt-ended, tarsi and tibiae II and III with spine-like setae..................................................................................................... P. spinosus sp. nov. - Setae h 1, d and f pointed, tarsus and tibia III with setiform setae …................................................................................................... P. tenuisetus Khaustov, 2006 12. Setae sc 2 and d subequal.................................................................................. 13 - Setae sc 2 distinctly longer than d..................................................................... 16 13. Tergites C and D with distinct emarginations in central part............................................................................................ P. incisus Khaustov and Chydyrov, 2010 - Tergites C and D without distinct emarginations in central part.................... 14 14. Setae ps 1 and ps 3 subequal in length................................................................ 15 - Setae ps 3 distinctly longer than ps 1....................................................................................................................... P. heterocaudatus Khaustov and Chydyrov, 2010 15. Setae f short and distinctly not reaching to posterior margin of the body........................................................................................... P. acutisetus Khaustov, 2009 - Setae f long and protruding the posterior margin of the body........................................................................................................ P. longisetosus (Mahunka, 1970) 16. Setae ps 3 distinctly longer than ps 1.................................................................. 17 - Setae ps 1 and ps 3 subequal in length................................................................ 18 17. Tarsus III with well-developed solenidion................................................................................................................... P. paradoxus Khaustov and Chydyrov, 2010 - Tarsus III without well-developed solenidion...... P. longicaudus Khaustov, 2006 18. Anterior margin of posterior sternal plate distinctly convex............................ 19 - Anterior margin of posterior sternal plate straight................................................................................................................... P. kaliszewskii Khaustov, 2006 19. Bases of setae e associated with well-developed apodemes.............................. 20 - Apodemes associated with bases of setae e absent or vestigial........................ 21 20. Setae sc 2 and c 1 subequal, setae c 2 and c 1 situated almost at the same level............................................................................................. P. rackae Khaustov, 2006 - Setae sc 2 distinctly longer than c 1, setae c 2 situated distinctly anterior to c 1........................................................................................ P. brevisetus Khaustov, 2006 21. Setae e shorter than setae f.............................................................................. 22 - Setae e longer than setae f.......................................... P. krczali Khaustov, 2006 22. Setae c 1 and e blunt ended.......... P. obtusisetosus Khaustov and Chydyrov, 2010 - Setae c 1 and e pointed..................................................................................... 23 23. All dorsal setae long and barbed....................... P. karadagensis Khaustov, 2009 - Dorsal setae short and usually smooth.................... P. montanus Khaustov, 2006Published as part of Hosseininaveh, Farahnaz, Hajiqanbar, Hamidreza & Talebi, Ali Asghar, 2014, Two new species of the genus Premicrodispus (Acari: Microdispidae) associated with beetles (Coleoptera: Lucanidae: Tenebrionidae), with a key to Palaearctic species of the genus, pp. 915-931 in Journal of Natural History 49 (15) on pages 922-930, DOI: 10.1080/00222933.2014.953225, http://zenodo.org/record/400469
Performance Evaluation Of H-shaped Micromixer
No full textDocumentos apresentados no âmbito do reconhecimento de graus e diplomas estrangeirosCompared to conventional macroscopic methods, microfluidic devices have the advantages of reduced solvent, reagent and cell consumption, shorter reaction times, portability, low cost and low power consumption. This study propose two novel generation of three Dimensional splitting and recombination passive micromixers (the longitudinal and cross-sectional unbalanced micromixer) that are designed based on the H-shaped balanced micromixer geometry. Numerical simulation were performed to study the mixing dynamics of two miscible liquids(water & ethanol) in all three types of micromixers and results compared
with the previous well-known H-shaped balanced micromixer. Laminar flow regime, incompressible, steady and no-slip velocity are Assumptions that govern fluid flow. It was found that mixing index and pressure drop are significantly affected by the unbalancing and depends on Reynolds number (inlet velocities).
increasing the Reynolds number will increase mixing index, at Re=100 the mixing index of the cross-sectional unbalanced micromixer is more than 90% while at Re=20 this is less than 70%. Creating an unbalanced flow will increase mixing index, however, cross-sectional unbalancing is more effective than longitudinal unbalancing, at Re=100 the mixing index of the cross-sectional
unbalanced micromixer has increased about 30% compared to the H-shaped balanced micromixer. Numerical results show that increasing the Reynolds number will increase pressure drop of all three types of micromixers. Compared with each other, the longitudinal unbalanced micro mixer and the H-shaped balanced micromixer with equal pressure drop, have 25% lower pressure drop than the cross-sectional unbalanced micromixer
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Perinatal outcomes in oocyte donor pregnancies
No full textTo assess the obstetric outcomes of pregnancy following intracytoplasmic sperm injection (ICSI) using donor oocytes. METHODS: Twenty-six deliveries from oocyte donor ICSI (d-ICSI) were compared to the next two consecutive deliveries from homologous ICSI (h-ICSI group) (n = 52) and with the two consecutive deliveries from women older than 40 years (Advanced Maternal Age: AMA) (n = 52). We evaluated the occurrence of gestational hypertension (GH), preeclampsia (PE), fetal growth restriction (IUGR), gestational diabetes mellitus (GDM), preterm premature rupture of membranes (pPROM), preterm birth, placental anomalies, mode of delivery, hemorrhage, gestational age at birth and birth weight. RESULTS: d-ICSI had significantly more PE (d-ICSI 19.2%, h-ICSI 0%, AMA 0%, p < 0.001); higher rates of IUGR than AMA pregnancies (d-ICSI 19.2%, AMA 3.8%, p < 0.025). Placental accretism was found only in the d-ICSI group (15.4%, p < 0.043). Not partum bleeding was observed. CONCLUSIONS: This is the first study that compares the obstetric outcomes of donor pregnancies to the outcomes of h-ICSI and AMA. Obstetricians who deal with pregnancies from oocyte donation need to be aware of the more severe obstetric outcomes, especially placenta accreta and preeclampsia. All women who conceive through oocyte donation should be counseled as early as the pre-conception period and referred to specific centers for high-risk pregnancies
Appropriate Similarity Measures for Author Cocitation Analysis
No full textWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Choeras qazviniensis Abdoli & Talebi & Farahani & Fernandez-Triana 2019, sp. nov.
No full text<i>Choeras qazviniensis</i> Fernandez-Triana & Talebi sp. nov. <p>(Figs 5a–h)</p> <p>urn:lsid:zoobank.org:act: 868F3B37-F4EF-4D4E-B86E-90F26A87884E</p> <p> <b>Diagnosis:</b> Pterostigma with a small light spot basally; vein r-m well developed, areolet closed; length/width T1: 1.40, slightly arched (barrel-shaped), with two yellow bands on lateral sides, T1 anterior two third with weak sculptures to smooth; T3+ yellow, medially with a brown band; ovipositor sheaths almost as long as metatibia.</p> <p> <b>Description.</b> Body length without ovipositor: 4.00 mm.</p> <p>Head: Antenna shorter than body; F 2/8/15 length/width: 2.50/2.40/1.25; mouthparts not elongated; gena, vertex and lower face densely and rather finely punctate; upper face smooth and setose; lower face with a weak median longitudinal carina on upper half, clypeus punctured; labrum flat and smooth; malar space length 0.32× basal width of mandible (Figs 5a,b); OOL/OD/POL length: 0.16/0.08/ 0.13 mm (Fig. 5c).</p> <p>Mesosoma: Anteromesoscutum length 0.80× its maximum width, densely punctate, posterior area with weak punctures to smooth; notauli not defined; scutoscutellar sulcus with visible crenulation; mesoscutellar disc smooth and shiny; side of mesoscutellar disc with wider crenulate depression; anterior area of metanotum smooth and with coarse wrinkles posteriorly; propodeum smooth with a rugose median band, and a complete median longitudinal carina (Fig. 5e); side of pronotum smooth; propleuron smooth or weakly punctate; prepectal carina absent; mesopleuron medially smooth, at anterolateral and ventrolateral punctate; metapleuron smooth, anterodorsal corner rugulose, with deep medial pit at anterior half (Fig. 5d).</p> <p>Wings: Fore wing. length: 4.00 mm; pterostigma length/width: 2.10; pterostigma distinctly shorter than vein R1; vein R1 5.50× as long as distance of vein R1 to vein 3RSb; vein r slightly shorter vein 2RS; vein 1M/m-cu length: 2.90; vein 3RSa distinct; areolet closed; vein 1-CUb almost as long as vein 1-CUa. Hind wing. vein M+CU/ 1-M length: 1.10; vein cu-a weak curved; vanal lobe with fringe anteriorly and slightly posteriorly, posterior margin partly straight (Figs 5f,g).</p> <p>Legs: Metacoxa laterally smooth; metafemur/metatibia/metabasitarsus/sum of other segments metatarsus length: 1.03/1.23/0.61/ 0.80 mm, respectively; metafemur length/width: 3.10; metatibial spurs length unequal; internal metatibial spurs/metabasitarsus length: 0.50 (Fig. 5d).</p> <p>Metasoma: T1 slightly curved, T1 length 1.40× its maximum width, barrel-shaped (i.e. anterior and posterior margins narrowed); anterior two third of T1 with weak sculptures to smooth, posterior one third rugose; T1 posterior width 2.50× T2 length medially; T2 transverse and rugose, medially slightly smooth; T3/T2 length: 2.80; T3+ smooth (Fig. 5h); ovipositor sheath curved downwards, rather widened posteriorly; ovipositor sheath length 1.20 mm, approximate as long as metatibia; hypopygium membranous and apically acute (Fig. 5d).</p> <p>Colouration: Body black; labrum, mandibles, palpi, scape and tegulae yellow; clypeus brown; legs almost yellow; metacoxa reddish yellow with a basal dark spot; metatibia posteriorly with a dark spot; distal half of metatibial segments brown (Fig. 5d); wings with brownish yellow setae; wings venation brown and yellow; pterostigma brown with a small light spot basally (Figs 5f,g); T1 with two yellow lateral bands; T3+ yellow, medially with a brown band (Fig. 5h).</p> <p> <b>Etymology:</b> The new species is named after the type locality. The species name " <i>qazviniensis "</i> is an adjective derived from the Qazvin province in the north of Iran.</p> <p> <b>Notes:</b> This species runs in the key by van Achterberg (2002) and Kotenko (2007) to <i>C. tiro</i> (Reinhard, 1880), it differs from <i>Choeras qazviniensis</i> <b>sp. nov.</b> as follows: in <i>C. tiro</i> pterostigma with a yellow spot on basal one third; T3/T2 length: 1.50–2.00; one third of metafemur black or with combination of black and yellow pattern. This species runs in the key by Song <i>et al.</i> (2014) to couplet 8. Two branches of the couplet 8 differ from <i>Choeras qazviniensis</i> <b>sp. nov.</b> as follows: in <i>C. longitergitus</i> Song & Chen, 2014 (first branch of couplet 8) T1 sharply narrowed apically; T1 and T2 largely smooth, only small areas rugose; T2 subtriangular. In the second branch of couplet 8 propodeum strongly rugose; T1 distinctly rectangular and parallel-sided.</p>Published as part of <i>Abdoli, Parisa, Talebi, Ali Asghar, Farahani, Samira & Fernandez-Triana, Jose, 2019, Three new species of the genus Choeras Mason, 1981 (Hymenoptera: Braconidae, Microgastrinae) from Iran, pp. 77-92 in Zootaxa 4545 (1)</i> on pages 85-86, DOI: 10.11646/zootaxa.4545.1.4, <a href="http://zenodo.org/record/2618679">http://zenodo.org/record/2618679</a>
Comment on "Gastric and colon metastasis from breast cancer: case report, review of the literature, and possible underlying mechanisms’’
No full textAmin Talebi Bezmin Abadi Department of Bacteriology, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, IranI have read the interesting case report by Villa Guzmán et al recently published in Breast Cancer (Dove Med Press).1 A female heavy smoker was diagnosed with lobular breast cancer. The authors hypothesized that Helicobacter pylori infection can attract chemokines attributed with local inflammation which ends in tumor cells’ migration. Concerning H. pylori and the presented hypothesis, I have some points which are listed as follows.Read the original article by Villa Guzmán and colleagues
Dispelling the Myths Behind First-author Citation Counts
No full textWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
The construction of Karen Karnak: The multi-author-function
No full textThis thesis is situated within the comparatively recent developments of Web 2.0 and the emergence of interactive WikiMedia, and explores the mode of authorship within a Read/Write culture compared to that of a Read/Only tradition. The hypothesis of this study is that the role of the audience has become merged with the author, and as such, represents new functions and attributes, distinct from a more conventional concept of authorship, in which the roles of audience and author are more separate. Read/Write and participatory culture, as defined by this study, is focused on collaboration, and includes the influences of D.I.Y. culture, Open-Source practices and the production of text by multiple authors. Multi-authorship presents a re-thinking of several concepts which support the notion of the individual author, since the focus of multi-authorship is not on attribution and ownership of a finished text, but on the continued malleability of a text. Modes of multi-authorship, demonstrated in the use of the pseudonyms Alan Smithee and Karen Eliot, represent declarative authors whose names signify multiple origins, whilst concurrently indicating a distinct body of work. The function of these names form an important context to this study, since primary research involves the construction of an experimental mode of multi-authorship utilising WikiMedia technology and the interaction of thirty nine participants, who are invited to create a body of work under the collective pseudonym Karen Karnak. The data generated by this experiment is analysed using aspects of Michel Foucault's author-function to identify and determine power structures inherent in the WikiMedia context. The interplay of power structures, including concepts such as identity, ownership and the body of work, affect the resulting mode of authorship and contribute to the construction of Karen Karnak, suggesting further areas of research into the emerging multi-author
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