1,327 research outputs found
Regulation and drug resistance mechanisms of mammalian ribonucleotide reductase, and the significance to DNA synthesis
No full textPT: J; CR: ALBERT DA, 1987, J CELL PHYSIOL, V130, P262 ASHIHARA T, 1979, METHOD ENZYMOL, V58, P248 BOLIN RW, 1982, CANCER, V50, P1683 CARLSON J, 1984, P NATL ACAD SCI USA, V81, P4294 CARTER GL, 1989, CANCER COMMUN, V1, P13 CHOY BK, 1988, CANCER RES, V48, P2029 CHOY BK, 1989, BIOCHEM BIOPH RES CO, V162, P1417 COCKING JM, 1987, SOMAT CELL MOLEC GEN, V13, P221 COWAN KH, 1986, MOL PHARMACOL, V30, P69 DICK JE, 1984, MECH AGEING DEV, V26, P37 DONOVAN PB, 1984, AM J HEMATOL, V17, P329 DRYSDALE JW, 1988, PROG NUCLEIC ACID RE, V35, P127 ENGSTROM Y, 1984, EMBO J, V3, P863 ERIKSSON S, 1981, J BIOL CHEM, V256, P9436 FOX RM, 1989, INT ENCY PHARM THER, V128, P113 HANKE PD, 1983, J BACTERIOL, V156, P1192 HARDS RG, 1984, ARCH BIOCHEM BIOPHYS, V231, P9 HOPPER S, 1972, J BIOL CHEM, V247, P3336 HURTA RAR, 1990, BIOCHEM BIOPH RES CO, V167, P258 HURTA RAR, 1990, IN PRESS BIOCH BIOPH LEWIS WH, 1974, BIOCHEM BIOPH RES CO, V60, P926 LEWIS WH, 1978, J CELL PHYSL, V97, P73 LEWIS WH, 1978, J CELL PHYSL, V97, P87 LEWIS WH, 1979, SOMATIC CELL GENET, V5, P83 LYNCH JB, 1989, J BIOL CHEM, V264, P8091 MCCLARTY GA, 1986, CANCER RES, V46, P4516 MCCLARTY GA, 1986, SOMAT CELL MOLEC GEN, V12, P121 MCCLARTY GA, 1987, BIOCHEM BIOPH RES CO, V145, P1276 MCCLARTY GA, 1987, BIOCHEMISTRY-US, V26, P8004 MCCLARTY GA, 1988, BIOCHEM BIOPH RES CO, V154, P975 MCCLARTY GA, 1988, BIOCHEMISTRY-US, V27, P7524 MCCLARTY GA, 1990, J BIOL CHEM, V265, P7539 MCCONLOGUE L, 1986, MOL CELL BIOL, V6, P2865 MCDONALD CJ, 1981, PHARMACOL THERAPEUT, V14, P1 PIVER MS, 1983, AM J OBSTET GYNECOL, V147, P803 RICHARD P, 1988, ANNU REV BIOCHEM, V57, P349 RITTBERG DAH, 1989, BIOCHEM CELL BIOL, V67, P352 SRINIVASAN PR, 1987, J BIOL CHEM, V262, P12871 TAGGER AY, 1987, BIOCH CELL BIOL, V65, P925 TAGGER AY, 1988, INT J CANCER, V42, P760 THEIL EC, 1987, ANNU REV BIOCHEM, V56, P289 THELANDER L, 1980, J BIOL CHEM, V255, P7426 THELANDER L, 1986, MOL CELL BIOL, V6, P3433 THELANDER M, 1985, J BIOL CHEM, V260, P2737 THOMAS CE, 1986, J BIOL CHEM, V261, P13064 TILL JE, 1973, FED PROC, V32, P29 TONIN PN, 1987, CYTOGENET CELL GENET, V45, P102 TONIN PN, 1989, ONCOGENE, V4, P1117 ULLMAN B, 1979, P NATL ACAD SCI USA, V76, P1074 VEALE D, 1988, BRIT J CANCER, V58, P70 WEBER G, 1983, CANCER RES, V43, P3466 WECKBECKER G, 1988, J NATL CANCER I, V80, P491 WEINBERG G, 1981, P NATL ACAD SCI USA, V78, P2447 WILLIAMS SR, 1987, J BIOL CHEM, V262, P2332 WRIGHT JA, 1974, J CELL PHYSIOL, V83, P437 WRIGHT JA, 1980, CAN J GENET CYTOL, V22, P443 WRIGHT JA, 1981, ADV ENZYME REGUL, V19, P105 WRIGHT JA, 1987, SOMAT CELL MOLEC GEN, V13, P155 WRIGHT JA, 1989, DRUG RESISTANCE MAMM, V1, P15 WRIGHT JA, 1989, INT ENCY PHARM THERA, V128, P89 YANGFENG TL, 1987, GENOMICS, V1, P77; NR: 61; TC: 75; J9: BIOCHEM CELL BIOL; PG: 8; GA: EM994Source type: Electronic(1
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No full text) Divyakant Agrawal Manhoi Choy y Hong Va Leong Ambuj K. Singh y Department of Computer Science University of California at Santa Barbara Santa Barbara, CA 93106 A general purpose parallel programmingmodel called mixed consistency is developed for distributed shared memory systems. This model combines two kinds of weak memory consistency conditions: causal memory and pipelined random access memory, and provides four kinds of explicit synchronization operations: read locks, write locks, barriers, and await operations. The resulting suite of memory and synchronization operations can be tailored to solve most programming problems in an efficient manner. Conditions are also developed under which the net effect of programming in this model is the same as programming with sequentially consistent memory. Several examples are included to illustrate the model and the correctness conditions. Keywords: distributed shared memory, memory consistency, concurrency, synchronization. 1 Int..
New concept to break the intrinsic properties of organic semiconductors for optical sensing applications
No full textThe space charge limit (SCL) effect is a universal phenomenon in semiconductor devices involving light emitting diodes, solar cells, and photodetectors. Typically, the SCL will exist in the condition of (1)
unbalanced hole and electron mobility; (2) thick active layer; (3) high light intensity or dense photocarriers (electrons and holes) generation; and (4) moderate reverse bias. Through the study of plasmonic organic solar cells, we will show metallic nanostructures go beyond their optical functions to
control recombination, transport, and collection of photocarriers generated from active organic materials. Through spatially redistributing light absorption at the active layer, the proposed plasmonic-electrical concept is fundamentally different from the hot carrier effect where photocarriers are generated from metallic nanostructures. The new plasmonic-electrical effect not only lays a physical foundation but also upgrades electrical properties for semiconductor devices [1]. We will also design different device
structures to investigate and demonstrated how plasmonic-electrical [2] and plasmonic-optical [3] effects can be used to enhance device performances such as improving the light absorption of solar cells, increasing emission efficiency of light emitting devices, reducing dark current and enhancing
sensitivity of photodetector as well as intensifying the surface enhanced Raman scattering for biosensor applications. Besides the optical (plasmonic) resonances from metal nanostructure, we will also use metal nanostructures to demonstrate electrical resonance which can be used for bistable and
memory devices [4]. Consequently, exploiting both plasmonic-optical and plasmonic-electrical effects via metallic nanostructures will open up a more flexible and integrated way to design high-performance optoelectronic nanodevices.
[1] W.E.I. Sha, X. Li, W.C.H. Choy, Scientific Reports, vol. 4, p. 6236 (10pp), 2014.
[2] F.X. Xie, W.C.H. Choy, W.E.I. Sha, D. Zhang, S. Zhang, X. Li, C.W. Leung, J. Hou, Energy Environ. Sci., vol. 6, pp.3372 – 3379, 2013; D. Zhang, W.C.H. Choy, F. Xie, W.E.I. Sha, X. Li, B. Ding, K. Zhang, F. Huang, and Y. Cao, Adv. Funct. Mat., vol. 23, pp.4255–4261, 2013; D.D.S. Fung, L. Qiao, W.C.H. Choy, C.C.D. Wang, W.E.I. Sha, F. Xie, and S. He, J. Mater. Chem., vol. 21, pp. 16349
– 16356, 2011.
[3] X.H. Li, W.C. H. Choy, X. Ren, D. Zhang, H.F. Lu, Adv. Funct. Mat. DOI: 10.1002/adfm.201303384; X.H.Li, W.C.H.Choy, H.F. Lu, W.E.I. Sha, and H. P. Ho, Adv. Funct. Mat., vol.23, pp.2728–2735, 2013; X.H. Li, W. C.H. Choy, L Huo, F.X. Xie, W.E.I. Sha, B. Ding, X. Guo, Y. Li, J. Hou, J. You, Y. Yang, Adv. Mater. vol. 24, pp.3046-3052, 2012; X.H. Li, W. E.I. Sha, W.C.H. Choy, D.D.S. Fung, F. X. Xie, J. of Phys. Chem. C, vol. 116, pp.7200-7206, 2012; C.C.D. Wang, W. C. H. Choy, C. Duan, D.D.S. Fung, W.E.I. Sha, F.X. Xie, F. Huang, and Y. Cao, J. Mater. Chem., vol. 22, pp.1206–1211, 2012.
[4] T.H. Zheng, W.C.H. Choy, and Y.X. Sun, vol. 19, pp.2648-2653, 2009; T.H. Zheng, W.C.H. Choy, and Y.X. Sun, Appl. Phys. Lett, vol. 94, 123303 (pp.3), 2009.published_or_final_versio
Macrobrachium equidens
No full textMacrobcrachium equidens (Dana, 1852) Palaemon equidens Dana, 1852: 26 [type locality: Singapore]. Palaemon sundaicus – Cowles, 1914: 355, Pl. 2 Fig. 3 (not Palaemon sundaicus Heller, 1862). Macrobrachium equidens – Holthuis, 1950:162, Fig. 36; 1980: 90; Liu et al., 1990: 110, Fig. 8; Chace & Bruce, 1993: 25, Fig. 4; Yeo et al., 1999: 226; Wowor & Choy, 2001: 282; Cai & Anker, 2004: 389; Cai et al., 2004: 589; Wowor et al., 2004: 349, Fig. 10H; Short, 2004: 26, Figs. 8, 9; Cai & Shokita, 2006a: 265. Material examined. – 1 male, cl 7.5 mm, ZRC, River outside Inabacan Cave, Antequrra, coll. Y. Cai et al., 16 Dec.2000; 1 male, cl 10.5 mm, 1 female, cl 10.0 mm, ZRC, Loboc River, Loboc, coll. Y. Cai et al., 19 Dec.2000. Remarks. – Marcobrachium equidens is a brackish water species, with gravid females and smaller specimens being commonly found in mangrove creeks. It is known from a very wide area in the Indo-West Pacific, from Madagascar to the Solomon Islands and Fiji (Choy, 1984; Chace & Bruce, 1993; Short, 2004). However, a recent molecular analysis results (Liu et al., 2007) show that the incongruence of non-monophyly of M. equidens, in 16S, COI and 16S+COI analyses, implied the existence of a cryptic species in the Philippines and Taiwan.Published as part of Cai, Yixiong, Choy, Satish & Ng, Peter K. L., 2009, Epigean And Hypogean Freshwater Shrimps Of Bohol Island, Central Philippines (Crustacea: Decapoda: Caridea), pp. 65-89 in Raffles Bulletin of Zoology 57 (1) on pages 86-87, DOI: 10.5281/zenodo.534157
Caridina liaoi Cai & Choy & Ng 2009, new species
No full textCaridina liaoi, new species (Figs. 5, 6) Material examined. – Holotype: Ovigerous female, cl 4.1 mm, USC, Bilar River, Bilar, coll. Y. Cai et al., 19 Dec.2000. Paratypes: 82 males, cl 2.8–4.3 mm, 112 females, cl 3.7–5.0 mm, 26 ovigerous females, cl 4.2–5.0 mm, ZRC 2007.0284, data same as holotype. Description. – Rostrum (Figs. 5A, 6A) long, reaching near to or slightly beyond end of scaphocerite; rostral formula: 3–4+13–14/13–15. Antennal spine fused with inferior orbital angle. Pterygostomian margin broadly rounded. Sixth abdominal somite 0.51 times of carapace, 1.7 times as long as fifth somite, distinctly shorter than telson. Telson (Figs. 6B, C) 3.5 times as long as wide, not terminating in a projection, with 3 or 4 pairs of dorsal spinules and 1 pair of dorsolateral spinules; lateral pair of spines distinctly longer than intermediate pairs of spiniform setae. Preanal carina (Fig. 6K) high, triangular, lacking spine. Eyes well developed, anterior end reaching to 0.8 times length of basal segment of antennular peduncle. Antennular peduncle 0.74 times as long as carapace; basal segment of antennular peduncle longer than both second and third segment lengths, anterolateral angle reaching 0.20 times length of second segment, second segment distinctly longer than third segment. Stylocerite reaching to 0.8 times length of basal segment of antennular peduncle. Scaphocerite (Fig. 6D) 3.4 times as long as wide. Incisor process of mandible ending in irregular teeth, molar process truncated. Lower lacinia of maxillula broadly rounded, upper lacinia elongated, with a number of distinct teeth on inner margin, palp slender. Upper endites of maxilla subdivided, palp short, scaphognathite tapering posteriorly with some long, curved setae at posterior end. Palp of first maxilliped broadly triangular. Second maxilliped typical of genus. Third maxilliped reaching to end of antennular peduncle, with ultimate segment as long as penultimate segment. Epipods on first 4 pereiopods. First pereiopod (Figs. 5B, 6E) reaching to end of basal segment of antennular peduncle; merus 1.9–2.2 times as long as broad, shorter than carpus; carpus excavated anteriorly, shorter than chela, 1.3–1.7 times as long as high; chela 2.3–3.5 time as long as broad; fingers slightly shorter, as long as or distinctly longer than palm. Second pereiopod (Figs. 5C, 6F) reaching to end of second segment of antennular peduncle; merus as long as carpus, 4.2–5.0 times as long as broad; carpus 1.1 times as long as chela, 2.3–2.4 times as long as high; chela 2.3–2.4 times as long as broad; fingers 1.6 times as long as palm. Third pereiopod (Figs. 5D, E, 6G, H) reaching to end of antennular peduncle, propodus 11–12 times as long as broad, 4.5–4.7 times as long as dactylus; dactylus 3.1–3.3 times as long as wide (spines included), with 4–6 accessory spines on flexor margin. Fifth pereiopod reaching to end of second segment of antennular peduncle, propodus 14–18 times as long as broad, 3.6–3.8 times as long as dactylus, dactylus 4.0–4.4 times as long as wide (spinules included), terminating in 1 large claw, with 60–65 spinules on flexor margin. Endopod of male first pleopod (Fig. 5H) sub-rectangular, two-fifth length of exopod, no appendix interna. Appendix masculina of male second pleopod (Fig. 5I) half length of endopod, with appendix interna reaching near end of appendix masculina. Uropodal diaeresis (Fig. 6L) with 14–16 movable spinules. Ovigerous females with eggs sized 0.92–0.95 × 0.55–0.60 mm. Habitat. – Caridina liaoi , new species, was collected from a tributary of the Bilar River near Bilar town, Bohol Island in central Philippines. Etymology. – The new species is named after Dr. Lawrence Liao, who has been instrumental in helping the first author making collections in the Philippines for the present study. Remarks.- Caridina liaoi , new species, is similar to C. buhi Cai & Shokita, 2006a, from Luzon, by the form of pereiopods, but it differs from C. buhi by its longer rostrum (reaches to or slightly beyond the anterior margin of the scaphocerite vs. reaches to the end of the second segment of the antennular peduncle or to the end of the antennular peduncle); the more ventral rostral teeth (13–15 vs. 3–7); the telson does not terminate in a projection vs. terminate in a projection; the bigger appendix interna on the male second pleopod (reaches near the end of the appendix masculina vs. reaches the base of the distal two-third length of the appendix masculina) and the distal spines on the telson (lateral spines much longer than the intermediate pairs of spiniform setae vs. lateral spines subequal to intermediate pairs) (Figs. 5, 6; cf. Cai & Shokita, 2006a: Figs. 3, 4).Published as part of Cai, Yixiong, Choy, Satish & Ng, Peter K. L., 2009, Epigean And Hypogean Freshwater Shrimps Of Bohol Island, Central Philippines (Crustacea: Decapoda: Caridea), pp. 65-89 in Raffles Bulletin of Zoology 57 (1) on pages 72-75, DOI: 10.5281/zenodo.534157
Macrobrachium scabriculum
No full text<i>Macrobrachium scabriculum</i> (Heller, 1862) <p> <i>Palaemon scabriculus</i> Heller, 1862: 527 [type locality: Sri Lanka].- Henderson & Matthai, 1910: 296, Pl.17 Figs. 7a–c, Pl. 18 Figs. 7a–p.</p> <p> <i>Macrobrachium scabriculum</i> – Holthuis, 1950: 224; Chace & Bruce, 1993: 37; Johnson, 1973: 15; Yeo et al., 1999: 231, Figs. 18; 19; Wowor & Choy, 2001: 286; Cai & Ng, 2002: Fig. 16; Wowor et al., 2004: 350, Fig. 12I; Cai & Shokita, 2006a: 266.</p> <p> <i>Material examined. –</i> One male, cl 19.5 mm, 1 ovigerous female, 24 mm, ZRC 2007.0310, Loboc River, Loboc, coll. Y. Cai et al., 19 Dec.2000.</p> <p> <i> <i>Remarks. –</i> Macrobrachium scabriculum</i> was reported recently from Mindanao (Cai & Shokita, 2006a). This is the second record for the species to occur in the Philippines.</p>Published as part of <i>Cai, Yixiong, Choy, Satish & Ng, Peter K. L., 2009, Epigean And Hypogean Freshwater Shrimps Of Bohol Island, Central Philippines (Crustacea: Decapoda: Caridea), pp. 65-89 in Raffles Bulletin of Zoology 57 (1)</i> on page 86, DOI: <a href="http://zenodo.org/record/5341574">10.5281/zenodo.5341574</a>
Polarized XANES study of the importance of inter-block vis-à-vis intra-block coupling in evolution of Tc in halide-molecule-intercalated Bi2Sr2CaCu2O8-δ single crystals
No full textIn addition to doping in the lattice that affects the intra-block coupling, intercalated molecules sit in between the consecutive basal planes, thereby increasing the effective length of the c-axis. This, in turn, must lead to a decrease in inter-block coupling. Both the doping and intercalation have been reported to affect the evolution of Tc in a system, implying the inherent importance of both types of coupling. In the latter case, the resulting depression of Tc is ascribed to transfer of charge between the intercalate and the host CuO2 plane. Most interesting studies in this regard pertain to use of I2, HgI2 and HgBr2 molecules as intercalates for the Bi2Sr2CaCu2O8+y system. Earlier reports mostly claim that the host CuO2 plane in Bi2Sr2CaCu2O8+y invariably becomes overdoped whichever the intercalate, thereby leading to a fall in Tc. In this paper, we examine these claims in the case of Bi2Sr2CaCu2O8+y single crystals by measuring the number of itinerant holes before and after intercalation by making polarization-dependent soft-x-ray absorption measurements at the O K and the Cu L3 edges. Our results do support the earlier claims on overdoing of the CuO2 plane in the case of iodine intercalate but are not in agreement with those in the case of the HgI2 intercalate
Palaemon concinnus Dana 1852
No full textPalaemon concinnus Dana, 1852 Palaemon concinnus Dana, 1852: 587 [type locality: Fiji Islands]; Holthuis, 1950: 61, Fig. 12; Chace & Bruce, 1993: 40; Cai & Ng, 2001: 686, Fig. 14f; Cai & Shokita, 2006a: 267. Material examined. – 2 males, cl 7.0– 7.6 mm, 1 female, cl 9.2 mm, ZRC 2007.0317, tributary of Loboc River, Loboc, coll. Y. Cai et al., 19 Dec.2000. Remarks. – Palaemon concinnus has a wide distribution in the Indo-West Pacific, from South Africa, Indonesia, Philippines to Marshall Islands and Tuamotu Archipelago in French Polynesia (Chace & Bruce, 1993). The species is commonly found in brackish to fresh water in the lower reaches of rivers.Published as part of Cai, Yixiong, Choy, Satish & Ng, Peter K. L., 2009, Epigean And Hypogean Freshwater Shrimps Of Bohol Island, Central Philippines (Crustacea: Decapoda: Caridea), pp. 65-89 in Raffles Bulletin of Zoology 57 (1) on page 87, DOI: 10.5281/zenodo.534157
Growth and characterization of Hf-aluminate high-k gate dielectric ultrathin films with equivalent oxide thickness less than 10 Å
No full textAuthor name used in this publication: J. Y. DaiAuthor name used in this publication: K. H. WongAuthor name used in this publication: H. L. W. ChanAuthor name used in this publication: C. L. Choy2002-2003 > Academic research: refereed > Publication in refereed journalVersion of RecordPublishedVoR allowe
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