59,038 research outputs found
Measurement of the ratio of prompt χ c to J / ψ production in pp collisions at √s = 7 TeV
No full textThe prompt production of charmonium χ c and J / ψ states is studied in proton-proton collisions at a centre-of-mass energy of √s = 7 TeV at the Large Hadron Collider. The χ c and J / ψ mesons are identified through their decays χ c → J / ψ γ and J / ψ → μ + μ - using 36 pb - 1 of data collected by the LHCb detector in 2010. The ratio of the prompt production cross-sections for χ c and J / ψ, σ (χ c → J / ψ γ) / σ (J / ψ), is determined as a function of the J / ψ transverse momentum in the range 2 < p T J / ψ < 15 GeV / c. The results are in excellent agreement with next-to-leading order non-relativistic expectations and show a significant discrepancy compared with the colour singlet model prediction at leading order, especially in the low p T J / ψ region
Evidence for the decay B0→J/ψω and measurement of the relative branching fractions of meson decays to J/ψη and J/ψη′
No full textFirst evidence of the B 0 → J / ψ ω decay is found and the B s 0 → J / ψ η and B s 0 → J / ψ η ′ decays are studied using a dataset corresponding to an integrated luminosity of 1.0 fb -1 collected by the LHCb experiment in proton-proton collisions at a centre-of-mass energy of sqrt(s) = 7 TeV. The branching fractions of these decays are measured relative to that of the B 0 → J / ψ ρ 0 decay:frac(B (B 0 → J / ψ ω), B (B 0 → J / ψ ρ 0)) = 0.89 ± 0.19 (stat) - 0.13 + 0.07 (syst),frac(B (B s 0 → J / ψ η), B (B 0 → J / ψ ρ 0)) = 14.0 ± 1.2 (stat) - 1.5 + 1.1 (syst) - 1.0 + 1.1 (frac(f d, f s)),frac(B (B s 0 → J / ψ η ′), B (B 0 → J / ψ ρ 0)) = 12.7 ± 1.1 (stat) - 1.3 + 0.5 (syst) - 0.9 + 1.0 (frac(f d, f s)), where the last uncertainty is due to the knowledge of f d / f s, the ratio of b-quark hadronization factors that accounts for the different production rate of B 0 and B s 0 mesons. The ratio of the branching fractions of B s 0 → J / ψ η ′ and B s 0 → J / ψ η decays is measured to befrac(B (B s 0 → J / ψ η ′), B (B s 0 → J / ψ η)) = 0.90 ± 0.09 (stat) - 0.02 + 0.06 (syst)
Pseudosenegalia riograndensis Seigler & Ebinger 2017, comb nov.
No full text2. Pseudosenegalia riograndensis (Atahuachi & L. Rico) Seigler & Ebinger, comb nov. Basionym: Acacia riograndensis Atahuachi & L. Rico, Kew Bull. 62: 605. 2007. TYPE: Bolivia. Cochabamba: Prov. Campero, Pasorapa, en la bajada de Buenavista hacia el Rıo Grande, 1447 m, 27 Dec. 2004, J. R. I. Wood, M. Atahuachi & M. Mercado 21251 (holotype, BOLV; isotypes, K! [barcode] K 00503018, K! [bc] K 005033019, LPB [bc] LPB0 0 0 0 6 7 6, MEXU [bc] MEXU0128851). Figure 11. Tree to 12 m tall; bark nearly white, smooth to shallowly fissured; twigs orange to reddish brown, not flexuous, terete, glabrous; short shoots present at some nodes, 0.4–1 mm long, with a few leaves attached; prickles absent. Leaves alternate, also clustered at short shoots, 15–55 mm long; stipules light brown, linear, symmetrical, flattened, straight, herbaceous, 1–2.5 X 0.1–0.2 mm, glabrous, usually persistent; petiole adaxially grooved, 4–13 mm long, glabrous; petiolar gland solitary, located just below to nearly between the lowermost pinna pair, sessile; orbicular to oval, 0.4–1.1 mm across, apex depressed, glabrous, sometimes absent; rachis adaxially grooved, 5–40 mm long, glabrous, an orbicular gland 0.3–0.7 mm across between the uppermost 1 to 2 pinna pair, apex depressed, glabrous; pinnae 3 to 7 pairs/leaf, 9– 2 0 mm long, 3–1 2 mm between pinna pairs; paraphyllidia absent; petiolule 0.9–2.1 mm long; leaflets 12 to 26 pairs/pinna, opposite, 0.8–1.7 mm between leaflet pairs, linear, 1.2–2.9 X 0.5–0.9 mm, glabrous, lateral veins not obvious, 1 vein from the base, base oblique, truncate on one side, margins lightly ciliate, apex obtuse, midvein subcentral. Inflorescence a loosely 40- to 90-flowered cylindrical spike, 28–60 X 12–18 mm, solitary from the leaf axils; peduncles 5–16 X 0.3–0.8 mm, glabrous; receptacle not enlarged; involucre absent; floral bracts spatulate, 0.7–1.1 mm long, ciliate, persistent. Flowers sessile, white; calyx 5-lobed, 1.5–2.2 mm long, lightly puberulent; corolla 5-lobed, 3.5–6 mm long, glabrous to puberulent, lobes 1/5 the length of the corolla; stamens 100 to 140; stamen filaments 7.5–9.5 mm long, distinct; anther glands absent; ovary glabrous, stipe to 2.1 mm long. Legumes straight, flattened, not constricted between the seeds, oblong, 95–130 X 10–15 mm, coriaceous, transversely striated, glabrous, eglandular, dehiscent along both sutures; stipe 6–11 mm long; apex acute, short beaked; seeds uniseriate, with no pulp, light brown, ellipsoid, strongly flattened, 9–11 X 6–7 mm, smooth; pleurogram U-shaped, 3–5 mm across. Habitat and distribution. Pseudosenegalia riograndensis is known locally in seasonally dry tropical forest at about 1300 m in the Rio Grande valley below Pasorapa, Provence Campero, Cochabamba, Bolivia. Phenology. Pseudosenegalia riograndensis flowers from November through December. IUCN Red List category. Pseudosenegalia riograndensis is assessed as Data Deficient (DD) at this time (IUCN, 2001). This species is apparently rare and is only known from two collections, the type and one other from a restricted region in Bolivia suggesting that the species may at least be Vulnerable (VU), perhaps Endangered (EN). Specimen examined. BOLIVIA: Cochabamba: Campero, Bosque Termotropical inferior de Neocardenasia herzogiana y Schinopsis haenkeana, 1300 m, 24 Nov. 1999, C. Antezana 1325 (NY).Published as part of Seigler, David S., Ebinger, John E., Riggins, Chance W., Terra, Vanessa & Miller, Joseph T., 2017, Parasenegalia and Pseudosenegalia (Fabaceae): New Genera of the Mimosoideae, pp. 180-205 in Novon 25 on pages 201-203, DOI: 10.3417/2015050, http://zenodo.org/record/256146
Measurement of the time-dependent CP asymmetry in B0 -> J/ψ KS0 decays
No full textThis Letter reports a measurement of the CP violation observables SJ/ψK0S and CJ/ψK0S in the decay channel B0→J/ψK0S performed with 1.0 fb−1 of pp collisions at s√=7 TeV collected by the LHCb experiment. The fit to the data yields SJ/ψK0S=0.73±0.07(stat)±0.04(syst) and CJ/ψK0S=0.03±0.09(stat)±0.01(syst). Both values are consistent with the current world averages and within
expectations from the Standard Model
Letter from J. E. Gavin to Louis C. Cramton regarding Sale of Bright Angel Trail
No full textLetter from J. E. Gavin to Louis C. Cramton regarding the Bright Angel Trail controversy, including newspaper clipping
Acute Ethanol Administration Rapidly Increases Phosphorylation of Conventional Protein Kinase C in Specific Mammalian Brain Regions in Vivo
No full textBackground
Protein kinase C (PKC) is a family of isoenzymes that regulate a variety of functions in the central nervous system including neurotransmitter release, ion channel activity, and cell differentiation. Growing evidence suggests that specific isoforms of PKC influence a variety of behavioral, biochemical, and physiological effects of ethanol in mammals. The purpose of this study was to determine whether acute ethanol exposure alters phosphorylation of conventional PKC isoforms at a threonine 674 (p-cPKC) site in the hydrophobic domain of the kinase, which is required for its catalytic activity.
Methods
Male rats were administered a dose range of ethanol (0, 0.5, 1, or 2 g/kg, intragastric) and brain tissue was removed 10 minutes later for evaluation of changes in p-cPKC expression using immunohistochemistry and Western blot methods.
Results
Immunohistochemical data show that the highest dose of ethanol (2 g/kg) rapidly increases p-cPKC immunoreactivity specifically in the nucleus accumbens (core and shell), lateral septum, and hippocampus (CA3 and dentate gyrus). Western blot analysis further showed that ethanol (2 g/kg) increased p-cPKC expression in the P2 membrane fraction of tissue from the nucleus accumbens and hippocampus. Although p-cPKC was expressed in numerous other brain regions, including the caudate nucleus, amygdala, and cortex, no changes were observed in response to acute ethanol. Total PKC? immunoreactivity was surveyed throughout the brain and showed no change following acute ethanol injection
Measurement of the branching fraction
No full textThe B
0
s
→ J/ψK
0
S
branching fraction is measured in a data sample corresponding to 0.41 fb−1
of integrated luminosity collected with the LHCb detector at the LHC. This channel is sensitive to
the penguin contributions affecting the sin 2β measurement from B
0
→ J/ψK
0
S
. The time-integrated
branching fraction is measured to be B(B
0
s
→ J/ψK
0
S
) = (1.83±0.28)×10−5
. This is the most precise
measurement to date
Parasenegalia visco Seigler & Ebinger & Riggins & Terra & Miller 2017, comb. nov.
No full text6. Parasenegalia visco (Lorentz ex Griseb.) Seigler & Ebinger, comb. nov. Basionym: Acacia visco Lorentz ex Griseb., Abh. Königl. Ges. Wiss. Göttingen. 19: 135, 279. 1874. [Pl. Lorentz. 87. 18 74.] Senegalia visco (Lorentz ex Griseb.) Seigler & Ebinger in Seigler et al., Phytologia 88(1): 78. 2006. TYPE: Argentina. Catamarca: Fuerte de Andalgala ad rivulos, 13 Jan. 1872, P. G. Lorentz 34 0 (lectotype, designated here, GOET [image!] [11463]; isolectotypes, CORD [image!] [barcode] CORD00004860, SI [image!] [bc] SI001494). Figure 8. Acacia concinna Phil., Anales Univ. Chile 2: 170. 1870, nom. illeg., non Acacia concinna (Willd.) DC., Prodr. [A. P. de Candolle] 2: 464. 1825. TYPE: Argentina. Mendoza: in hortis, Philippi s.n. (lectotype, designated here, SGO [image seen] [barcode] SGO000002427, SGO photo at SI; isolectotypes, SGO fragm. at SI, SI photo at F! [27897], G, MO). Acacia platensis Manganaro, Anales Soc. Ci. Argent. 87: 128– 133, figs. 12, 13. 1919. Manganaroa platensis (Manganaro) Speg., Bol. Acad. Nac. Ci. 26: 254, pls. 255, 257, 265.1921. TYPE:Argentina (lectotype,designated by Cialdella, 1984: 96, LP [barcode] LPS24314). Acacia polyphylla Clos in Gay, Fl. Chil. 2: 254. 1846, nom. illeg., non Acacia polyphylla DC., Cat. Pl. Horti Monsp., 74. 18 13. Lysiloma polyphyllum Benth., Trans. Linn. Soc. London 30: 535. 1875. TYPE: Chile. ‘‘Pcia. Coquimbo, San Isidro, 1836, an culta’’ (lectotype, designated here, SGO [image seen]; isolectotypes, BR! [barcode] BR0000005117031, K [image seen] [bc] K000530853, P [image seen] [bc] P02142747. P [image seen] [bc] P03641821, P [image seen] [bc] P0 3 6 4 1 8 2 2, P [image seen] [bc] P03641823, P [image seen] [bc] P03641824, SGO fragm. at SI [image seen] [bc] SI661495). Acacia riparia Kunth b [var.] angustifoliola Kuntze, Revis. Gen. Pl. 3(3): 47. 1898. TYPE: Bolivia. Santa Cruz: Sierra de Santa Cruz, 2000 m, C. E. O. Kuntze s.n. (lectotype, designated here, NY! [barcode] NY00001542; isolectotype, F!). Manganaroa subsericea Speg., Bol. Acad. Nac. Ci. 26: 267. 1921 [1923]. TYPE: Argentina. Salta: ‘‘In dumetis montanis praeandinis, locis Quebrada de Guachipas et Pampa grande vocatis,’’ C. L. Spegazzini s.n. (lectotype, designated by Seigler et al., 2006a: 78, LP (LPS-14305) [image seen] [barcode] LP001053; isolectotype, LP [bc] LP001054). Tree to 25 m tall; bark not seen; twigs light to dark reddish brown, not flexuous, terete, glabrous to lightly puberulent; short shoots absent; prickles absent. Leaves alternate, 60–170 mm long; stipules light to dark brown, linear, symmetrical, flattened, straight, herbaceous, 2–6 mm long, 0.4–0.7 mm wide near the base, usually glabrous, tardily deciduous; petiole adaxially grooved, 25–45 mm long, lightly puberulent; petiolar gland solitary, anywhere along the petiole, sessile, usually oblong, 0.7–2.7 mm long, apex flattened to depressed, glabrous; rachis adaxially grooved, 35–130 mm long, puberulent, an oval to orbicular gland 0.5–1.2 mm across between the uppermost 1 to 2 pinna pairs, apex flattened to depressed, glabrous; pinnae (3)4 to 11(14) pairs/leaf, 40–70 mm long, 8–21 mm between pinna pairs; paraphyllidia 0.5–1.2 mm long; petiolule 1.1–2.2 mm long; leaflets 25 to 50 pairs/pinna, opposite, 0.8–2.1 mm between leaflet pairs, oblong, 3–7 X 0.8–2.1 mm, appressed pubescent on both surfaces, lateral veins sometimes obvious, 1 to 3 veins from the base, base oblique, truncate on one side, margins lightly ciliate, apex narrowly acute to acuminate, midvein submarginal, bluish purple beneath. Inflorescence a densely 40- to 75-flowered globose head 16–23 mm across, 1 to 3 in the leaf axils; peduncles 15–40 X 0.5–0.8 mm, puberulent; receptacle enlarged, not elongate, globose; involucre a small bract scattered along the peduncle, early deciduous, sometimes absent; floral bracts spatulate, 1.2–1.9 mm long, puberulent, early deciduous. Flowers sessile, white; calyx 5-lobed, 1.7–2.8 mm long, puberulent; corolla 5-lobed, 3.2– 4.3 mm long, lightly puberulent, lobes 1/5 the length of the corolla; stamens 60 to 90; stamen filaments 8– 11 mm long, distinct; anther glands present; ovary glabrous to rarely pubescent, stipe to 1 mm long. Legumes straight, flattened, not constricted between the seeds, oblong, 80–150 X 18–30 mm, chartaceous, transversely striate, glabrous to lightly puberulent, minute purple glands commonly present, dehiscent along both sutures; stipe 4–10 mm long; apex obtuse, the beak to 10 mm long; seeds uniseriate, no pulp, light brown, oval to oblong, strongly flattened, 9–13 X 7–10 mm, smooth; pleurogram U-shaped, 1.2–2.2 mm across. Habitat and distribution. Parasenegalia visco has been collected from seasonally wet mountains, deciduous forests, riparian forests, yungas, disturbed second-growth forests, and thickets, from 750 to 3000 m in northern Argentina, through Bolivia, northern Chile, and Peru. The taxon is commonly cultivated in Peru as well as where native (Rico Arce, 2007). Phenology. Parasenegalia visco flowers from October through January. Local names and uses. Local names include visco, arca, viscote, viscote negro, viscote blanco, and visite (Rico Arce, 2007). Parasenegalia visco is commonly cultivated for its wood. IUCN Red List category. Parasenegalia visco is assessed as Data Deficient (DD) at this time (IUCN, 2 0 0 1) but is an abundant species of southern South America and is commonly cultivat- ed in Argentina, Chile, Peru, Uruguay, and South Africa as an ornamental and as a fast-growing tree for cabinet wood (Rico Arce, 2 0 0 7). Parasenegalia visco is also known from numerous collections from Argentina and Bolivia and is probably of Least Concern (LC). Discussion. Parasenegalia visco is a large South American tree that is commonly cultivated and economically important for wood products. The globose inflorescence more than 16 mm across, along with the small leaflets (3–7 X 0.8–2.1 mm) with bluish purple midveins, distinguish this species from other members of the genus. Paul G. Lorentz was a German botanist and professor at the University of Córdoba, Argentina, until 1 8 74. His vascular plant collections at GOET were the sources for species described by Grisebach in his Plantae Lorentzianae (1 8 7 4) and Symbolae ad Floram Argentinam (1 8 7 9). The collection Lorentz 3 4 0 at GOET has an original label identifying the species as Acacia visite, which corresponded to the first name used by Grisebach in Plantae Lorentzianae (1 87 4: 1 3 5), which was emended in this same work to Acacia visco (1 87 4: 2 7 9). Although no collection was specified in the protologue, Lorentz can be assumed to be the collector (Stafleu & Cowan, 1 9 7 6: 1 0 1 1, 1 98 1: 1 5 7) for species similarly described by Grisebach. The lectotype at GOET (1 1 4 63) bears an original label with the spelling as Acacia Visite. This species was cited as introduced into South Africa as Acacia visite Griseb. (Ross, 1 9 7 5). Two common names were mentioned in the protologue by Grisebach (1874) for his Acacia species number 269 (1874: 135), as ‘‘[n]omen vernac. Visite, Visco.’’ These vernacular names were a source of confusion for the species epithet. On page 135, Grisebach described the new species as ‘‘269. Acacia Visite Gr.,’’ but this was emended by him in the same work on page 279 under ‘‘Verbesserungen’’ (Improvements), as ‘‘S. 135 nr. 269 statt [instead of] A. Visite Gr. lies [read] A. Visco Lor. in litt.’’ It is this emendation that indicated Grisebach’s intent to change the epithet to the other vernacular name, acknowledging Lorentz as well. Grisebach’s intent was further supported in his later treatment of Acacia in Symbolae ad Floram Argentinam (1879: 122), where the species was also cited as ‘‘ A. Visco Lor. mscr. – Syn. A. Visite Pl. Lor. [269],’’ with the number corresponding to the species number in the previous 1874 treatment in his Plantae Lorentzianae. The specimen chosen as the lectotype of Acacia concinna is representative of that species and is from the home institution (SGO) of Philippi, the describing author. No specimen was cited by Manganaro (1919: 128– 129) in the protologue for Acacia platensis, although she did note the species as ‘‘visto cultivada esta planta en Buenos Aires y en La Plata....’’ Spegazzini (1921) transferred the name to the genus Manganar- oa Speg. based on Manganaro’s study. Cialdella cited the specimen with the word ‘‘typus’’ written on it, presumably used by both previous investigators, LP [barcode] LPS24314, as the holotype. We interpret this as a de facto lectotypification. Although the name Mimosa polyphylla Clos was written on the type specimen of Acacia polyphylla Clos in Gay, apparently this name in Mimosa was never published. If this name were published, it would be the oldest name for Parasenegalia visco, but still illegitimate. The SGO lectotype chosen for A. polyphylla is representative of the species and is from the home institution of the describing author. Kuntze (1898: 47) described Acacia riparia var. angustifoliola from two countries as ‘‘Bolivia: Sierra de Santa Cruz 2000 m. and Argentina: Provinz Santiago.’’ Of these two possible syntypes, the NY (barcode NY0 0 0 0 1 5 4 2) sheet from Bolivia was annotated by Seigler and Ebinger (2009) as the holotype, emended here as the lectotype. A syntype of Manganaroa subsericea from Argentina (prov. Buenos Aires, La Plata, Jardín Botanico ‘‘Facultad de Agron.’’), also identified as the collection C. L. Spegazzini s.n., is at LP (LPS- 14305) (Cialdella, 1984). Specimens examined. ARGENTINA. Catamarca: Andalgala, 1 9 5 0 m, 2 8 Nov. 19 4 6, C. A. O’Donnell 4 1 8 3 (S); S of Cumbre de las Lajos, 1 7 0 0 m, 2 6 Nov. 1 9 4 6, B. Sparre 9 7 6 (S); Choya–El Tofo, 1 8 0 0 m, 2 8 Nov. 1 9 4 6, B. Sparre 1 0 0 3 (S); Andalgala, 2 8 Nov. 1 9 46, E. Wall s.n. (MO). Córdoba: 4 km N of Sarmiento, 1 0 8 0 m, 1 2 Oct. 1 9 8 8, J. Aronson 7 6 4 6 (MO); Puesto del Paraiso, 4 Jan. 1 8 9 7, T. Stuckert 1 2 7 1 (G); Villa Rosario, 1 4 Nov. 1 9 0 2, T. Stuckert 1 1 9 6 3 (G). Jujuy: El Volcan, 1 3 May 1 8 7 3, Lorentz & Hieronymus 7 1 4 (S), 7 5 9 (S); Purmamarca, 1 1 Jan. 1 9 7 1, A. Krapovickas & C. L. Cristóbal 1 7 6 3 7 (WIS); 2 km de Volcan camino a Lozano, 2 3 4 0 m, 1 0 Feb. 1 9 9 8, O. Morrone, N. B. Deginani, A. M. Cialdella & L. M. Giussani 2 4 0 1 (MO); Sierra de Calidegus, 8 0 0 m, 1 5 Oct. 1 9 2 7, S. Venturi 5 3 8 2 (CAS, GH, MO); San Pedro, 7 5 0 m, 2 0 Oct. 1 9 2 9, S. Venturi 9 7 4 4 (CAS, MO); Purmamarca, 2 8 Oct. 1 9 8 2, E. M. Zardini & M. L. Pochettino 1 5 6 4 (MO). La Rioja: 1 0 km S of Famatina, RN 4 0, 1 4 5 0 m, 1 4 Mar. 1 9 9 3, S. M. Botta & D. C. Miconi 5 9 0 (MO); Famatina, 1 6 0 0 m, 1 1 Jan. 1 9 4 7, J. H. Hunziker 1 8 1 5 (MO); Castro Barros, 1 5 km W of Anillaco, 1 9 8 0 m, 3 0 Mar. 1 9 9 2, J. H. Hunziker & J. C. Gamerro 1 2 48 0 (MO); Los Duraznillas, 7 5 0 m, 3 Nov. 1 9 4 7, I. Huasi 3 5 (GH). Salta: 2 0 km S of Salta, 1 1 2 0 m, 5 Nov. 1 9 8 8, J. Aronson 7 6 9 0 (MO); Cafayate, 8 Nov. 1 9 7 8, A. L. Cabrera, S. Botto, C. Ezcurra, A. M. Ragonese & M. Vazques A. 2 9 7 0 3 (MO); Cafayate, 8 Jan. 1 9 7 2, A. Krapovickas & C. L. Cristóbal 2 0 7 2 7 (WIS); Chorrillos, 2 1 1 0 m, 1 7 Jan. 1 9 41, T. Meyer 3 5 6 0 (GH); San Fernando, 6 May 1 9 4 7, T. Meyer 1 2 4 5 7 (RSA, US); Iruya, 2 7 0 0–2 8 0 0 m, 8 Nov. 1 9 8 8, L. J. Novara, T. Adzet & J. Masso 8 1 9 8 (B, M); Salta, 5 Nov. 1 9 8 2, E. M. Zardini 1 6 1 9 (MO); Iruya, 1 0 Feb. 1 9 8 3, E. M. Zardini 1 9 6 5 (GH); Iruya, 1 0 Feb. 1 9 8 3, E. M. Zardini, M. L. Pochettino, J. Hurrell, C. Iudica & D. Ramadori 1 9 6 5 (MO). Tucuman: San Javier, 1 0 50 m, 4 Nov. 1 9 7 8, S. A. Renvoize, M. Wilmot-Dear & R. Kiesling 3 3 6 4 (MO); Francas a Zarate, 7 8 0 m, 1 2 Oct. 1 9 2 5, Schreiter 6 8 5 9 0 (BM); Tapia, 2 7 Oct. 1 9 7 6, D. S. Seigler & F. Vervoorst 1 0 1 0 8A (EIU, ILL); Tapia, 2 7 Oct. 1 9 7 6, D. S. Seigler & F. Vervoorst 1 0 1 1 4 (ILL, MO); 1 3.8 km SE of Amaicha del Valle on rd. to Tafi del Valle, 2 4 0 0 m, 4 May 1 9 8 5, J. C. Solomon 1 3 5 3 6 (MO); Yerba Buena, 7 0 0 m, 1 9 2 6, S. Venturi 6 7 (GH); Tapia, 7 5 0 m, 2 4 Oct. 1 9 2 3, S. Venturi 2 4 7 6 (CAS, MO); Cerro del Campo, 8 0 0 m, 4 Nov. 1 9 2 8, S. Venturi 7 4 5 2 (GH). BOLIVIA. Chuquisaca: Comunidad Pitatorillas, 27 7 4 m, 2 2 Sep. 2 0 0 7, M. Jiménez, E. Cervantes & F. Janko 3 6 1 (ILL, MO). Cochabamba: camino hacia Omereque, Km. 1 8 6, 2 0 4 0 m, 2 7 Oct. 1 9 9 3, C. Antezana 3 9 7 (MO); vic. of Cochabamba, 1 8 9 1, M. Bang 9 2 1 (MO); city of Cochabamba, 1 8 Nov. 1 9 8 2, L. Bohs 1 9 9 0 (F, GH); near Arani, 2 7 7 0 m, May 1 9 4 7, M. Cardenas & H. C. Cutler 3 8 8 3 (GH); Arani, 2 7 0 0 m, 2 9 Nov. 1 9 7 9, T. Feuerer 6 9 4 2 (HBG); park, Colina de San Sebastian, Cochabamba, 2 57 5 m, 2 4 Nov. 1 9 8 4, M. Nee 3 0 3 5 2 (MO); 6 km NE of El Convento, 2 5 4 6 m, 1 3 Mar. 2 0 0 3, L. Rico 1 5 5 9 (MO); Mizque, 2 0 2 5 m, 2 7 Dec. 2 0 0 2, L. Rico & T. Windsor-Shaw 1 1 9 9 (MO); Carrasco, 2 1 0 0 m, 1 1 Feb. 1 9 8 7, J. C. Solomon & M. Nee 1 6 0 2 4 (ILL, MO, NY). La Paz: Hacienda Huajchilla, 1 8 km SE of La Paz, 3 0 0 0 m, 1 8 Dec. 1 9 8 6, J. C. Solomon 1 5 7 7 7 (ILL, MO). Potosí: Charcas, 2 5 0 0 m, A. Uzedo 5 (HBG). Santa Cruz: Saipina, 18 0 0 m, 2 2 Oct. 1 9 94, J. Balcazar 6 9 (MO); hills E of Salta, 1 3 0 0–1 4 0 0 m, 2 2 Sep. 1 9 8 5, A. Gentry & C. Palacia 5 1 7 3 1A (MO); rd. from Mairana to Postrervalle, 7.7 km SSE of Quirusillas, 1 75 0 m, 3 1 Dec. 1 9 9 7, M. Nee 4 7 6 6 0 (ILL, MO); 3.7 km NW of bridge over Rio Comarapa at Comarapa, 2 0 0 0 m, 2 4 Nov. 1 9 9 9, M. Nee 5 0 5 9 3 (MO); 5 km SW of Comarapa on rd. to Chilón, 1 7 7 5 m, 2 6 Nov. 1 9 9 9, M. Nee 5 0 6 6 8 (MO); 4 0 km E of Comarapa, 1 7 4 0 m, 2 2 Oct. 1 9 9 1, M. Saldias & T. Pennington 1 4 7 9 (MO); 1 1 km de Comarapa, 2 7 4 0 m, 3 July 1 9 8 9, D. N. Smith, V. García & M. Buddensiek 1 3 6 0 7 (MO); Comarapa, 2 0 0 0 m, 2 6 Oct. 1 9 2 8, J. Steinbach 8 5 7 8 (A, GH, S); Huasacañada, 2 0 5 0 m, 1 5 Feb. 1 9 9 0, I. G. Vargas C. 4 2 9 (MO); Huasacanãda, 2 0 5 0 m, 5 Nov. 1 9 8 9, I. G. Vargas C. 3 3 3 (MO); Huasacañada, 5 km S of Vallegrande, 2 0 5 0 m, 3 Nov. 1 9 9 0, I. G. Vargas C. 8 0 4 (MO); Huasacañada, 5 km S of Vallegrande, 2 0 5 0 m, 1 5 May 1 9 9 2, I. G. Vargas C. 1 3 9 8 (MO); Vallegrande, 1 3 km pasando Pucara en el camino hacia el Puente del Río Grande, 1 1 5 0 m, 2 1 Oct. 2 0 0 1, I. G. Vargas, C. Jordan & A. Vargas J. 6 6 2 2 (ILL, MO). Tarija: 6 km SW of Chocloca, 2 0 0 0 m, 2 5 Mar. 1 9 7 9, St. G. Beck 7 5 1 (US); Tarija, 1 9 2 0 m, 1 0 Jan. 1 9 7 9, C. Ruiz s.n. (US); 3 0 km de Tarija (vers Entre Rios), 1 8 5 0 m, 3 Dec. 1 9 7 5, J. R. de Sloover 3 8 1 (MO). CHILE. Tarapaca: Arica Prov., 1st Region, Codpa, 1 8 2 0 m, 1 2 Feb. 1 9 8 9, J. Aronson 7 7 5 8 (MO). PERU. Lima: Lima, 2 8 Nov. 1 9 6 6, S. S. Tillett 6 6 1 1-5 7 (A) (cultivated). Tacna: Alrededores de Tacna, 3 0 Oct. 1 9 4 8, R. Ferreyra 4 0 7 1 (MO, US).Published as part of Seigler, David S., Ebinger, John E., Riggins, Chance W., Terra, Vanessa & Miller, Joseph T., 2017, Parasenegalia and Pseudosenegalia (Fabaceae): New Genera of the Mimosoideae, pp. 180-205 in Novon 25 on pages 194-196, DOI: 10.3417/2015050, http://zenodo.org/record/256146
The nature of the crust beneath the Afar triple junction: Evidence from receiver functions
No full textThe Afar depression is an ideal locale to study the role of extension and magmatism as rifting progresses to seafloor spreading. Here we present receiver function results from new and legacy experiments. Crustal thickness ranges from ?45 km beneath the highlands to ?16 km beneath an incipient oceanic spreading center in northern Afar. The crust beneath Afar has a thickness of 20–26 km outside the currently active rift segments and thins northward. It is bounded by thick crust beneath the highlands of the western plateau (?40 km) and southeastern plateau (?35 km). The western plateau shows VP/VS ranging between 1.7–1.9, suggesting a mafic altered crust, likely associated with Cenozoic flood basalts, or current magmatism. The southeastern plateau shows VP/VS more typical of silicic continental crust (?1.78). For crustal thicknesses <26 km, high VP/VS (>2.0) can only be explained by significant amounts of magmatic intrusions in the lower crust. This suggests that melt emplacement plays an important role in late stage rifting, and melt in the lower crust likely feeds magmatic activity. The crust between the location of the Miocene Red Sea rift axis and the current rift axis is thinner (<22 km) with higher VP/VS (>2.0) than beneath the eastern part of Afar (>26 km, VP/VS < 1.9). This suggests that the eastern region contains less partial melt, has undergone less stretching/extension and has preserved a more continental crustal signature than west of the current rift axis. The Red Sea rift axis appears to have migrated eastward through time to accommodate the migration of the Afar triple junction
Letter from J. R. Eakin to Arthur G. Ringland
No full textLetter (copy) from J. R. Eakin to Arthur C. Ringland about the alignment of 40 acres near the Buggeln ranch
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