395 research outputs found
Incidence of Preneoplastic Foci in Rat Liver Dependent on Different Promoting Schemes.
No full textAfter initiation, preneoplastic cell foci emerge in rat liver. They develop differently dependent on promotion, which favors foci incidence with respect to number and size. The process of promotion is dependent on various factors, e.g. the onset and duration of the promotion period (e.g. Deml et al 1981, for literature see: Oesterle and Deml 1983; Deml and Oesterle 1987). In the present experiments, using the rat liver foci bioassay (Oesterle and Deml 1983), the kinetics of development of foci was studied after the application of three different promoting schemes
Trichotaenia nzingae Oesterle, Serrano & Capela, sp. n.
No full textTrichotaenia nzingae Oesterle, Serrano & Capela sp. n. (Figs 1, 2, 3, 6 a) Type series. Holotype, ♂; Angola (BIÉ), 17 km ESE Cachingues (coord.: unknown, 1654 m alt., 281), 16.XI. 2013, DO, A. Oesterle leg., SMNS. Allotype 1 ♀, Paratypes 1 ♂, 1 ♀, Kakande (coord.: 12 º 42´50.73 ´´ S, 16 º 45´33.19 ´´ E, 1716 m alt., 233) (BIÉ), 30.X. 2014, DO, A. Serrano leg., ASC (Allotype 1 ♀, Paratype 1 ♂), MRAC (Paratype 1 ♀); Further paratypes: Angola (BIÉ), 17 km ESE Cachingues (coord.: unknown, 1650 m alt., 281), 16.XI.2013, 2♂, DO, A. Osterle leg., 17.XI.2013, 1♂, 2 ♀, DO, A. Oesterle leg., AOC, Angola (BIÉ), 34 km ESE Cachingues (coord.: unknown, 1650 m alt., 281), 17.XI.2013, 1♀, DO, G. Werner leg., GWC, 18.XI.2013, 2♀, DO, G. Werner leg., GWC and PSC; Angola (BIÉ), 34 km ESE Cachingues (coord.: unknown, 1650 m alt., 281), 17.XI.2013, 1♂, DO, A. Oesterle leg., 18.XI.2013, 6♂, 3 ♀, DO, A. Oesterle leg., AOC. Holotype deposited in the collection of SMNS; Allotype deposited in ASC; Paratypes deposited in AOC (10 ♂, 5 ♀), ASC (1 ♂), GWC (2 ♀), MRAC (1 ♀) and PSC (1 ♀). Derivatio nominis. This species is dedicated to “ Ngola Ana Nzinga Mbande”, known as “Rainha Ginga” also, which was a queen (Ngola) of the kingdoms of Ndongo and Matamba in south‒western Africa in the seventeenth century. The royal title in Kimbundu language, Ngola, was the name used by the Portuguese to name the region (Angola). Diagnosis. A winged Trichotaenia species, black coloured with some slight punctual purpurish and bluish or violet reflections on head, pronotum and elytra. Clypeus mostly setose, blackish with some purpurish blue-greenish reflections. Labrum large, rounded and 5 -toothed in front, variable setose on half posteriad surface with just four marginal sensorial setae, piceous in most specimens, triangularly doubled blackened in the first basal third (males) or triangularly blackened almost in the basal half and part of the apical half (females). A stripe of dense white recumbent pubescence on genae, continuing behind on the ventral half of pro and mesepisterna, on metepisterna up to the lateral sides of first four or five visible abdominal sternites. Sternum, except lateral half of metasternum, and abdominal sternites otherwise glabrous. Antennae attaining nearly the half of the elytral length in male, shorter in female; antennomeres 1-4 dark metallic black with bluish or violaceous reflections, antennomeres 5-10 strongly foliated. Elytral shoulders and part of the disk glabrous. Elytra with decumbent pubescence (Fig. 3) covering the submarginal sides, from the middle of basal third to the apex where it becomes slightly wider and closer to the elytral margin in its apical third, emitting three or sometimes four rami on disc (one slightly arcuate just above the apex, one or two near the middle and a longer one above the middle ascending diagonally to the base of scutellum). A subsutural small elongate tuft of closely appressed setae below the scutellum, sometimes prolonged by sparse setae along the suture. A stripe of setae descending diagonaly between the middle of the anteriad discal ramus and the sutural band, sometimes incomplete. Elytral decumbent pubescence leaving four, sometimes five, naked areoles in between, one subsutural below the appressed setae close to the scutellum, the second one immediately above the middle, the third and larger one below the middle, a fourth one below it and before the apical area, and sometimes a fifth smaller one between the subapical stripe and the lower ramus of the middle stripe. Description. Length of Holotype: 10.3 mm. Length of paratypes (without labrum): 9.2–10.3 mm (males), 10.2–11.4 mm (females). Head (Figs 2 a‒ 2 b). Wider than long (1.4 times) [length: 1.76–2.08 mm (males), 1.95–2.40 mm (females), width 2.76–2.82 mm (males) and 2.85–3.18 mm (females)], with large eyes, slightly narrower than body (Fig. 1), dorsal colour black with coppery reflections; surface sculpture rugulose, rugae forming irregular longitudinal meshes on vertex and transverse meshes on occiput; rugae straight, more or less parallel on orbital plates and frons; occiput, lateral parts of vertex, frons and clypeus sparsely covered with short piceous decumbent setae, temples (lateral area of head behind eyes) indistinctly striaterugulose, glabrous, glossy; a continuous narrow strip in the middle region of vertex and occiput glabrous; genae covered with dense white decumbent pubescence; orbital plates with two sublateral setigerous punctures; labrum large, shape nearly semicircular in both sexes (Figs 2 a‒ 2 b), transverse, wider than long (males: 1.4–1.5 times, females: 1.3–1.4 times), proportionally slightly longer in females [length: 0.90–1.07 mm (males), 1.22–1.44 mm (females), width 1.36–1.54 mm (males) and 1.60–1.92 mm (females)], anterior margin five-toothed, middle basal half slightly protruding, four sublateral sensorial setae, basal and median portions covered with sparse, white decumbent setae (males: 13–53, females: 5–71); colour yellowish with outer margin black, males triangularly doubled blackened in the first basal third, females triangularly blackened almost in the basal half, rarely reaching the anterior margin; antennae reaching the beginning of the median elytral transverse stripe of decumbent setae in male, shorter in female; antennomeres 1–4 dark metallic black with bluish or violaceous reflections, antennomeres 5–10 strongly dilated and foliated, more pronounced in females; mandibles four-toothed, black with large yellow patch basally on outer edge; maxillary and labial palpi light yellow, except terminal palpomeres black with metallic reflections; penultimate palpomere of labial palpus moderately inflated. Thorax. Pronotum (Figs 2 c‒ 2 d) transverse slightly wider than long (1.1 times) [length: 1.68–1.95 mm (males) and 1.79–2.08 mm (females); width: 1.82–2.05 mm (males) and 2.08–2.30 mm (females)], subcordiform-shaped, with the anterior margin slightly larger [width: 1.66–1.84 mm (males) and 1.95–2.11 mm (females)] than the posterior one [width: 1.60–1.79 mm (males) and 1.79–1.92 mm (females)]; black, on each side with a broad sublateral band with cupric reflections, this bands are covered with dense piceous decumbent pubescence, which is transversaly directed on median lobe, oblique on posterior and anterior lobes; along each side of median lobe and on central portions of anterior and posterior lobes a few additional thin piceous setae; surface of pronotum rugulose, rugae forming irregular meshes on latero-dorsal portions, along middle line a narrow band with more transverse-parallel rugae; dorsal half of proepisterna glabrous, ventral half densely covered with white decumbent pubescence which continues that of genae and extends to mesepisterna, metepisterna, lateral portions of metasternum and metacoxae to lateral portions of the first four to five abdominal sterni; proepisterna not visible from above; coupling sulcus: a deeply pitted, funnel-formed impression centrally in upper half of mesepisternum. Elytra (Fig. 3) longer than wide (1.7 –2.0 times) [(length: 5.61–6.47 mm (males) and 6.47–7.06 mm (females); width: 3.01–3.36 mm (males) and 3.58–3.96 mm (females)], subrectangular-shaped, elongated (males) (Figs 3 a–c), more convex and enlarged (females) (Fig. 3 d), shoulders very marked, apex ending in a short but acute sutural spine in both sexes, surface sculptured by coarse, but very densely arranged polygonal (quadrangular to hexagonal) alveoli slight sharply walled, apical margin with distinct microserrulation; posteriad disc near suture not (males) or slightly protruding in relief in its uppermost region (females); colour of elytra black with more or less coppery lustre only in the pubescent areas, otherwise with some bluish or violaceous reflections; Elytra with white-piceous decumbent pubescence, consisting of a submarginal band, from the middle of basal third to the apex where it becomes slightly wider and closer to the elytral margin, anteriad ramus bending inwards towards the base of elytron close to the base of scutellum in the basal third of elytron; this anteriad ramus is sometimes prolonged diagonally in the middle to the subsutural sparse band of setae; the sublateral band emits around or nearly behind the middle a slightly backward straight spur on disc, sometimes divided into two rami (an upper ramus around the middle larger than a lower ramus below the middle, which sometimes can reach the base of the subapical band), and one oblique and slightly arcuate in the apical third of elytron not reaching the suture (sometimes discontinued, forming an isolated discal and more or less circular tuft); parallel to the suture occurs a narrow subsutural band of sparse decumbent setae, beginning near a small elongated tuft of closely appressed setae below the scutellum. Ventral surface. Black, with stronger coppery-golden reflections in head and thorax parts, violet lustre in abdominal sternites; sides of these sternites with decumbent pubescence, except the ultimate or sometimes the ultimate and penultimate ones, becoming sparser towards apex; trochanters black. Legs. Metallic black with greenish reflections in tarsi and violaceous-bluish in femora and tibiae, a few rows of spiniform setae on femora and tibiae; Aedeagus (Fig. 6 a) relatively small (length: 2.56–2.85 mm), arched, tapering, with a straight, simple apex. Intraspecific variation. The range of variability observed in T. nzingae sp. n. (19 specimens) affects the colour and the number of labral decumbent setae (see description) and slightly the elytral decumbent pubescence. The variability within this last character is associated with colour (more or less whitish or piceous) and with minor gaps of setae in the anteriad diagonal band, in the transversal middle band, in the posteriad transversal middle band and in the subapical band (e.g., Figs 3 b‒d). The shapes of pronotum and elytra are very conservative, but variation in the length of the apical denticle of elytra is very common, with individuals having longer denticles than others. Asymmetries in the length of left and right elytron denticles within the same specimen are common too.Published as part of Serrano, Artur R. M., Capela, Rúben A. & Oesterle, Andreas, 2015, Three new species of tiger beetles and new data on Cicindelina species from Angola (Coleoptera: Carabidae: Cicindelinae), pp. 151-178 in Zootaxa 4032 (2) on pages 154-158, DOI: 10.11646/zootaxa.4032.2.1, http://zenodo.org/record/25374
Learning with interactive animated worked-out examples in groups of two
No full textSalle A. Learning with interactive animated worked-out examples in groups of two. In: Allan D, Liljedahl P, Nicol C, Oesterle S, eds. Proceedings of the 38th Conference of the International Group for the Psychology of Mathematics Education. Vol 5. Vancouver, Canada: PME; 2014: 81–88
Kitsch als eine Bedingung der Möglichkeit von romantischer Kunst?
No full textGrave J. Kitsch als eine Bedingung der Möglichkeit von romantischer Kunst? In: von Graevenitz G, Hinderer W, Neumann G, Oesterle G, von Wietersheim D, eds. Romantik kontrovers. Stiftung für Romantikforschung. Vol 58. Würzburg: Königshausen und Neumann; 2015: 93-105
Reflecting on good mathematics teaching: knowing, nurturing, noticing
No full textThe chapter "Reflecting on good mathematics teaching: Knowing, nurturing, noticing" was written by Susan Oesterle (Douglas College Faculty). The book brings together recent research and commentary in secondary school mathematics from a breadth of contemporary Canadian and International researchers and educators. It is both representative of mathematics education generally, as well as unique to the particular geography and culture of Canada. The chapters address topics of broad applicability such as technology in learning mathematics, recent interest in social justice contexts in the learning of mathematics, as well as Indigenous education. The voices of classroom practitioners, the group ultimately responsible for implementing this new vision of mathematics teaching and learning, are not forgotten. Each section includes a chapter written by a classroom teacher, making this volume unique in its approach. Part of the "Advances in mathematics education" series. Provided by publisher.book chapte
Accelerating junior-secondary mathematics
No full textUnfortunately, in Australia there is a prevalence of mathematically underperforming\ud
junior-secondary students in low-socioeconomic status schools. This requires targeted\ud
intervention to develop the affected students’ requisite understanding in preparation\ud
for post-compulsory study and employment and, ultimately, to increase their life\ud
chances. To address this, the ongoing action research project presented in this paper is\ud
developing a curriculum of accelerated learning, informed by a lineage of\ud
cognitivist-based structural sequence theory building activity (e.g., Cooper & Warren,\ud
2011). The project’s conceptual framework features three pillars: the vertically\ud
structured sequencing of concepts; pedagogy grounded in students’ reality and culture;\ud
and professional learning to support teachers’ implementation of the curriculum\ud
(Cooper, Nutchey, & Grant, 2013). Quantitative and qualitative data informs the\ud
ongoing refinement of the theory, the curriculum, and the teacher support
Prior to school mathematical skills and knowledge of low-achieving children at the end of grade 1
No full textKollhoff S, Peter-Koop A. Prior to school mathematical skills and knowledge of low-achieving children at the end of grade 1. In: Liljedahl P, Nicol C, Oesterle S, Allan D, eds. Proceedings of the 38th Conference of the International Group for the Psychology of Mathematics Education and the 36th Conference of the North American Chapter of the Psychology of Mathematics Education. Band 4. Vancouver, Canada: PME; 2014: 9-16
Influence of early repeating patterning ability on school mathematics learning
No full textLüken M, Peter-Koop A, Kollhoff S. Influence of early repeating patterning ability on school mathematics learning. In: Liljedahl P, Nicol C, Oesterle S, Allan D, eds. Proceedings of the 38th Conference of the International Group for the Psychology of Mathematics Education and the 36th Conference of the North American Chapter of the Psychology of Mathematics Education. Vol. 4. Vancouver, Canada: PME; 2014: 137-144
Chemical modifications of aminonaphthalenesulfonic acid derivatives increase effectivity and specificity of reverse transcriptase inhibition and change mode of action of reverse transcriptase and DNA polymerase alpha inhibition
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