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Locally advanced salivary duct carcinoma of the parotid gland

Kallianpur, Ashwin; Yadav, Rajni; Shukla, Nootan K.; Deo, S. V. S.; Muduly, Dilip K.
Fonte: Medknow Publications & Media Pvt Ltd Publicador: Medknow Publications & Media Pvt Ltd
Tipo: Artigo de Revista Científica
Publicado em //2012 EN
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Due to the low incidence of salivary duct carcinoma (SDC), there is limited data in regard to the biologic behavior of this tumor, histopathological characteristics and its management. There is diversity in the management of parotid SDC. Various authors manage it with radical parotidectomy with or without neck dissection; others add adjuvant radiotherapy with radical surgery. The objective of the study is to see the biological behavior and management of the three patients with locally advanced SDC and review with the literature.

KCNJ2 mutation in short QT syndrome 3 results in atrial fibrillation and ventricular proarrhythmia

Deo, Makarand; Ruan, Yanfei; Pandit, Sandeep V.; Shah, Kushal; Berenfeld, Omer; Blaufox, Andrew; Cerrone, Marina; Noujaim, Sami F.; Denegri, Marco; Jalife, José; Priori, Silvia G.
Fonte: National Academy of Sciences Publicador: National Academy of Sciences
Tipo: Artigo de Revista Científica
EN
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We describe a mutation (E299V) in KCNJ2, the gene that encodes the strong inward rectifier K+ channel protein (Kir2.1), in an 11-y-old boy. The unique short QT syndrome type-3 phenotype is associated with an extremely abbreviated QT interval (200 ms) on ECG and paroxysmal atrial fibrillation. Genetic screening identified an A896T substitution in a highly conserved region of KCNJ2 that resulted in a de novo mutation E299V. Whole-cell patch-clamp experiments showed that E299V presents an abnormally large outward IK1 at potentials above −55 mV (P < 0.001 versus wild type) due to a lack of inward rectification. Coexpression of wild-type and mutant channels to mimic the heterozygous condition still resulted in a large outward current. Coimmunoprecipitation and kinetic analysis showed that E299V and wild-type isoforms may heteromerize and that their interaction impairs function. The homomeric assembly of E299V mutant proteins actually results in gain of function. Computer simulations of ventricular excitation and propagation using both the homozygous and heterozygous conditions at three different levels of integration (single cell, 2D, and 3D) accurately reproduced the electrocardiographic phenotype of the proband, including an exceedingly short QT interval with merging of the QRS and the T wave...

PAK1 Protein Expression in the Auditory Cortex of Schizophrenia Subjects

Deo, Anthony J.; Goldszer, Isaac M.; Li, Siyu; DiBitetto, James V.; Henteleff, Ruth; Sampson, Allan; Lewis, David A.; Penzes, Peter; Sweet, Robert A.
Fonte: Public Library of Science Publicador: Public Library of Science
Tipo: Artigo de Revista Científica
Publicado em 22/04/2013 EN
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Deficits in auditory processing are among the best documented endophenotypes in schizophrenia, possibly due to loss of excitatory synaptic connections. Dendritic spines, the principal post-synaptic target of excitatory projections, are reduced in schizophrenia. p21-activated kinase 1 (PAK1) regulates both the actin cytoskeleton and dendritic spine density, and is a downstream effector of both kalirin and CDC42, both of which have altered expression in schizophrenia. This study sought to determine if there is decreased auditory cortex PAK1 protein expression in schizophrenia through the use of quantitative western blots of 25 schizophrenia subjects and matched controls. There was no significant change in PAK1 level detected in the schizophrenia subjects in our cohort. PAK1 protein levels within subject pairs correlated positively with prior measures of total kalirin protein in the same pairs. PAK1 level also correlated with levels of a marker of dendritic spines, spinophilin. These latter two findings suggest that the lack of change in PAK1 level in schizophrenia is not due to limited sensitivity of our assay to detect meaningful differences in PAK1 protein expression. Future studies are needed to evaluate whether alterations in PAK1 phosphorylation states...

Comparative transcriptome analysis of Gossypium hirsutum L. in response to sap sucking insects: aphid and whitefly

Dubey, Neeraj Kumar; Goel, Ridhi; Ranjan, Alok; Idris, Asif; Singh, Sunil Kumar; Bag, Sumit K; Chandrashekar, Krishnappa; Pandey, Kapil Deo; Singh, Pradhyumna Kumar; Sawant, Samir V
Fonte: BioMed Central Publicador: BioMed Central
Tipo: Artigo de Revista Científica
Publicado em 11/04/2013 EN
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Laparoscopic Radical Distal Gastrectomy for Ca Stomach

Deo, Sadhana V.; Puntambekar, Shailesh P.
Fonte: Springer India Publicador: Springer India
Tipo: Artigo de Revista Científica
EN
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Gastric cancer remains an important cause of cancer-related deaths and a complete margin-negative (R0) resection remains the only potentially curative treatment for gastric adenocarcinoma. We report a case of carcinoma of distal stomach in a 48-year-old male patient who was diagnosed on UGI endoscopy and CT scan. He had symptoms suggestive of gastric outlet obstruction due to stenosing lesion. He was successfully treated with laparoscopic distal gastrectomy with D2 lymphadenectomy. Laparoscopic distal gastrectomy is justified by its feasibility, early recovery, oncological safety, and improved quality of life in cancer stomach.

Pathotype and Genetic Diversity amongst Indian Isolates of Xanthomonas oryzae pv. oryzae

Mishra, Deo; Vishnupriya, Manne Ramachander; Anil, Madhusoodana Girija; Konda, Kotilingam; Raj, Yog; Sonti, Ramesh V.
Fonte: Public Library of Science Publicador: Public Library of Science
Tipo: Artigo de Revista Científica
Publicado em 29/11/2013 EN
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A number of rice resistance genes, called Xa genes, have been identified that confer resistance against various strains of Xanthomonas oryzae pv. oryzae (Xoo), the causal agent of bacterial blight. An understanding of pathotype diversity within the target pathogen population is required for identifying the Xa genes that are to be deployed for development of resistant rice cultivars. Among 1024 isolates of Xoo collected from 20 different states of India, 11 major pathotypes were distinguished based on their reaction towards ten Xa genes (Xa1, Xa3, Xa4, xa5, Xa7, xa8, Xa10, Xa11, xa13, Xa21). Isolates belonging to pathotype III showing incompatible interaction towards xa8, xa13 and Xa21 and compatible interaction towards the rest of Xa genes formed the most frequent (41%) and widely distributed pathotype. The vast majority of the assayed Xoo isolates were incompatible with one or more Xa genes. Exceptionally, the isolates of pathotype XI were virulent on all Xa genes, but have restricted distribution. Considering the individual R-genes, Xa21 appeared as the most broadly effective, conferring resistance against 88 % of the isolates, followed in decreasing order by xa13 (84 %), xa8 (64 %), xa5 (30 %), Xa7 (17 %) and Xa4 (14 %). Fifty isolates representing all the eleven pathotypes were analyzed by southern hybridization to determine their genetic relatedness using the IS1112 repeat element of Xoo. Isolates belonging to pathotype XI were the most divergent. The results suggest that one RFLP haplotype that is widely distributed all over India and is represented in strains from five different pathotypes might be an ancestral haplotype. A rice line with xa5...

Iron-Regulated Protein HupB of Mycobacterium tuberculosis Positively Regulates Siderophore Biosynthesis and Is Essential for Growth in Macrophages

Pandey, Satya Deo; Choudhury, Mitali; Yousuf, Suhail; Wheeler, Paul R.; Gordon, Stephen V.; Ranjan, Akash; Sritharan, Manjula
Fonte: American Society for Microbiology Publicador: American Society for Microbiology
Tipo: Artigo de Revista Científica
Publicado em /05/2014 EN
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Mycobacterium tuberculosis expresses the 28-kDa protein HupB (Rv2986c) and the Fe3+-specific high-affinity siderophores mycobactin and carboxymycobactin upon iron limitation. The objective of this study was to understand the functional role of HupB in iron acquisition. A hupB mutant strain of M. tuberculosis, subjected to growth in low-iron medium (0.02 μg Fe ml−1), showed a marked reduction of both siderophores with low transcript levels of the mbt genes encoding the MB biosynthetic machinery. Complementation of the mutant strain with hupB restored siderophore production to levels comparable to that of the wild type. We demonstrated the binding of HupB to the mbtB promoter by both electrophoretic mobility shift assays and DNA footprinting. The latter revealed the HupB binding site to be a 10-bp AT-rich region. While negative regulation of the mbt machinery by IdeR is known, this is the first report of positive regulation of the mbt operon by HupB. Interestingly, the mutant strain failed to survive inside macrophages, suggesting that HupB plays an important role in vivo.

Reduced Na+ Current Density Underlies Impaired Propagation in the Diabetic Rabbit Ventricle

Stables, Catherine L.; Musa, Hassan; Mitra, Aditi; Bhushal, Sandesh; Deo, Makarand; Guerrero-Serna, Guadalupe; Mironov, Sergey; Zarzoso, Manuel; Vikstrom, Karen L.; Cawthorn, William; Pandit, Sandeep V.
Fonte: PubMed Publicador: PubMed
Tipo: Artigo de Revista Científica
EN
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Diabetes is associated with an increased risk of sudden cardiac death, but the underlying mechanisms remain unclear. Our goal was to investigate changes occurring in the action potential duration (APD) and conduction velocity (CV) in the diabetic rabbit ventricle, and delineate the principal ionic determinants. A rabbit model of alloxan-induced diabetes was utilized. Optical imaging was used to record electrical activity in isolated Langendorff-perfused hearts in normo-, hypo- and hyper-kalemia ([K+]o=4, 2, 12 mM respectively). Patch clamp experiments were conducted to record Na+ current (INa) in isolated ventricular myocytes. The mRNA/protein expression levels for Nav1.5 (the α-subunit of INa) and connexin-43 (Cx43), as well as fibrosis levels were examined. Computer simulations were performed to interpret experimental data. We found that the APD was not different, but that the CV was significantly reduced in diabetic hearts in normo-, hypo-, and, in hyper-kalemic conditions (13%, 17% and 33% reduction in diabetic vs. control, respectively). The cell capacitance (Cm) was increased (by ~14%), and the density of INa was reduced by ~32% in diabetes compared to controls, but the other biophysical properties of INa were unaltered. The mRNA/protein expression levels for Cx43 were unaltered. For Nav1.5...

A Study on Genetic Variants of Fibroblast Growth Factor Receptor 2 (FGFR2) and the Risk of Breast Cancer from North India

Siddiqui, Sarah; Chattopadhyay, Shilpi; Akhtar, Md. Salman; Najm, Mohammad Zeeshan; Deo, S. V. S.; Shukla, N. K.; Husain, Syed Akhtar
Fonte: Public Library of Science Publicador: Public Library of Science
Tipo: Artigo de Revista Científica
Publicado em 21/10/2014 EN
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Genome-Wide Association Studies (GWAS) have identified Fibroblast growth factor receptor 2 (FGFR2) as a candidate gene for breast cancer with single nucleotide polymorphisms (SNPs) located in intron 2 region as the susceptibility loci strongly associated with the risk. However, replicate studies have often failed to extrapolate the association to diverse ethnic regions. This hints towards the existing heterogeneity among different populations, arising due to differential linkage disequilibrium (LD) structures and frequencies of SNPs within the associated regions of the genome. It is therefore important to revisit the previously linked candidates in varied population groups to unravel the extent of heterogeneity. In an attempt to investigate the role of FGFR2 polymorphisms in susceptibility to the risk of breast cancer among North Indian women, we genotyped rs2981582, rs1219648, rs2981578 and rs7895676 polymorphisms in 368 breast cancer patients and 484 healthy controls by Polymerase chain reaction-Restriction fragment length polymorphism (PCR-RFLP) assay. We observed a statistically significant association with breast cancer risk for all the four genetic variants (P<0.05). In per-allele model for rs2981582, rs1219648, rs7895676 and in dominant model for rs2981578...

Estimating the Concrete Compressive Strength Using Hard Clustering and Fuzzy Clustering Based Regression Techniques

Nagwani, Naresh Kumar; Deo, Shirish V.
Fonte: Hindawi Publishing Corporation Publicador: Hindawi Publishing Corporation
Tipo: Artigo de Revista Científica
EN
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Understanding of the compressive strength of concrete is important for activities like construction arrangement, prestressing operations, and proportioning new mixtures and for the quality assurance. Regression techniques are most widely used for prediction tasks where relationship between the independent variables and dependent (prediction) variable is identified. The accuracy of the regression techniques for prediction can be improved if clustering can be used along with regression. Clustering along with regression will ensure the more accurate curve fitting between the dependent and independent variables. In this work cluster regression technique is applied for estimating the compressive strength of the concrete and a novel state of the art is proposed for predicting the concrete compressive strength. The objective of this work is to demonstrate that clustering along with regression ensures less prediction errors for estimating the concrete compressive strength. The proposed technique consists of two major stages: in the first stage, clustering is used to group the similar characteristics concrete data and then in the second stage regression techniques are applied over these clusters (groups) to predict the compressive strength from individual clusters. It is found from experiments that clustering along with regression techniques gives minimum errors for predicting compressive strength of concrete; also fuzzy clustering algorithm C-means performs better than K-means algorithm.

Alpha thalassaemia in tribal communities of coastal Maharashtra, India

Deo, Madhav G.; Pawar, Prakash V.
Fonte: Medknow Publications & Media Pvt Ltd Publicador: Medknow Publications & Media Pvt Ltd
Tipo: Artigo de Revista Científica
Publicado em /08/2014 EN
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The Ionic Bases of the Action Potential in Isolated Mouse Cardiac Purkinje Cell

Vaidyanathan, Ravi; O’Connell, Ryan P.; Deo, Makarand; Milstein, Michelle L.; Furspan, Philip; Herron, Todd J.; Pandit, Sandeep V.; Musa, Hassan; Berenfeld, Omer; Jalife, José; Anumonwo, Justus M.B.
Fonte: PubMed Publicador: PubMed
Tipo: Artigo de Revista Científica
EN
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Direct-Liquid-Injection Chemical Vapor Deposition of Nickel Nitride Films and Their Reduction to Nickel Films

Li, Zhefeng; Gordon, Roy Gerald; Pallem, Venkateswara; Li, Huazhi; Shenai, Deo V.
Fonte: American Chemical Society Publicador: American Chemical Society
Tipo: Artigo de Revista Científica
EN_US
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Smooth and continuous films of nickel nitride (NiNx) with excellent step coverage were deposited from a novel nickel amidinate precursor, Ni(MeC(NtBu)2)2, and either ammonia (NH3) or a mixture of NH3 and hydrogen (H2) gases as co-reactants. The reactants were injected together in direct-liquid-injection chemical vapor deposition (DLI-CVD) processes at substrate temperatures of 160−200 °C. Depending on the ratio of NH3 to H2 gases during deposition, the Ni:N atomic ratio in DLI-CVD NiNx films could be varied from 3:1 to 15:1, having either a cubic nickel structure or a mixture of hexagonal Ni3N and cubic Ni4N crystal structures with an incorporation of nitrogen as low as 6%. The chemical vapor deposition (CVD) growth rates of NiNx could be increased to more than 5 nm/min. The CVD films were smooth and continuous, and they had 100% step coverage in high-aspect-ratio (>50:1) holes. The as-deposited NiNx films had resistivities as low as 50 μΩ cm for film thicknesses of 25 nm. Annealing of the films in H2 at 160 °C or hydrogen plasma treatment at room temperature removed the nitrogen and led to pure nickel films.; Chemistry and Chemical Biology

Atomic Layer Deposition of Lanthanum-Based Ternary Oxides

Wang, Hongtao; Wang, Jun-Jieh; Gordon, Roy Gerald; Lehn, Jean-Sébastien M.; Li, Huazhi; Hong, Daewon; Shenai, Deo V.
Fonte: Electrochemical Society Publicador: Electrochemical Society
Tipo: Artigo de Revista Científica
EN_US
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Lanthanum-based ternary oxide (La_xM_{2−x}O_3) (M = Sc, Lu, or Y) films were deposited on HF-last Si substrates by atomic layer deposition. Both (LaScO_3) and (LaLuO_3) films are amorphous while the as-deposited (La_xY_{2−x}O_3) films form a polycrystalline layer/amorphous layer structure on Si. Transmission electron microscopy and electrical analysis show the absence of interfacial layers. The dielectric constants for (LaScO_3), (LaLuO_3), and (La_{1.23}Y_{0.77}O_3) films are (sim 23), (28 pm 1), and (17 pm 1.3), respectively, with leakage current density up to 6 orders of magnitude lower than that of thermal (SiO_2) with the same effective oxide thickness. Conformal coating thickness is demonstrated on holes with aspect ratio (sim 80:1).; Chemistry and Chemical Biology

New Ni Amidinate Source for ALD/CVD of NiNx, NiO and Ni

Li, Huazhi; Perera, Thiloma; Shenai, Deo V.; Li, Zhefeng; Gordon, Roy Gerald
Fonte: Harvard University Publicador: Harvard University
Tipo: Outros
EN_US
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Ni materials in the form of NiNx, NiO or NiSi have been found to be particularly important in memory as well as logic applications. Nickel silicide (NiSi) is emerging as the choice material for contact applications in semiconductor devices with 45nm technology node and beyond.(^{1}) Recent research shows that the resistance switching characteristics of NiO thin film, in combinations with a metal-insulator-metal (MIM) structure, offer potential applications for the next generation nonvolatile resistive random access memory devices.(^{2}) As the feature sizes of microelectronic circuits are shrinking, more complex structures are going to be adopted by the industry. Atomic layer deposition (ALD) is the preferred technique that can produce ultra-thin conformal layers (<10 nm). Nickel amidinate (Ni-AMD) has been demonstrated as an excellent precursor for both ALD and CVD Ni thin films due to its greater thermal stability and high reactivity. (^{3}) We report our results on deposition of NiO, NiNx and its conversion into NiSi using Ni-AMD, and discuss the chemistry of forming (NiO), (NiN_x) and (NiSi) films with vapor depletion and direct liquid injection (DLI) using various organic solvents that enhance the deposition process.; Chemistry and Chemical Biology; Engineering and Applied Sciences

Vapor Deposition of Highly Conformal Copper Seed Layers for Plating Through-Silicon Vias (TSVs)

Au, Yeung; Min Wang, Qing; Li, Huazhi; Lehn, Jean-Sebastien M.; Shenai, Deo V.; Gordon, Roy Gerald
Fonte: Electrochemical Society Publicador: Electrochemical Society
Tipo: Artigo de Revista Científica
EN_US
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Through-silicon vias (TSV) will speed up interconnections between chips. Manufacturable and cost-effective TSVs will allow faster computer systems. In this paper, we report the successful formation of seed layers for plating copper TSVs with aspect ratios greater than 25:1. Following the rapid atomic layer deposition (ALD) of a conformal insulating layer of silica inside the silicon vias, manganese nitride (Mn4N) is deposited conformally on the silica surface by chemical vapor deposition (CVD). Mn4N forms an effective copper diffusion barrier and provides strong adhesion between the silica and the subsequently-deposited copper. Conformal copper or copper-manganese alloy films are then deposited by an iodine-catalyzed direct-liquid-injection (DLI) CVD process. Diffusion of manganese during post-deposition annealing further enhances the barrier and adhesion properties at the copper/dielectric interface; Chemistry and Chemical Biology

Avalia??o do efeito antigenot?xico e anticitot?xico do bioproduto m?todo CANOVA?

NASCIMENTO, Henrique Fonseca Sousa do
Fonte: Universidade Federal do Pará Publicador: Universidade Federal do Pará
Tipo: Dissertação de Mestrado
POR
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O M?todo CANOVA? (CA) ? um imunomodulador brasileiro de formula??o homeop?tica. CA ? indicado em condi??es cl?nicas nas quais o sistema imune se encontre comprometido. O N-Metil-N-Nitrosoureia (NMU) ? um agente N-nitroso alquilante e carcinog?nico utilizado como modelo experimental em roedores e macacos. O NMU tamb?m apresenta efeitos genot?xicos/mutag?nicos analis?veis por testes cl?ssicos de detec??o de danos ao DNA e aberra??es cromoss?micas. Apesar de v?rios estudos terem demonstrado resultados promissores na utiliza??o do medicamento CA, n?o existem trabalhos relatando poss?veis efeitos antigenot?xicos deste medicamento, a despeito de seu potencial anticarcinog?nico. Assim, o presente trabalho avaliou in vitro os efeitos antigenot?xicos e anticitot?xicos do medicamento CA em linf?citos humanos expostos ao NMU. Foram utilizadas amostras de linf?citos humanos que foram submetidos a diferentes concentra??es de uma mistura contendo CA e NMU. A viabilidade das c?lulas expostas ao NMU foi avaliada pelo ensaio MTT, a genotoxicidade/antigenotoxicidade do CA foi avaliada pelo teste do cometa e a anticitotoxicidade do CA foi verificada pela quantifica??o de apoptose e necrose utilizando corantes fluorescentes (laranja de acridina/brometo de et?deo). No teste MTT verificamos que o NMU conseguiu diminuir a viabilidade dos linf?citos de forma significativa. No teste do cometa foi observado que CA diminui significativamente os danos ao DNA induzidos pelo NMU...

Extratos de Pyrostegia venusta: caracteriza??o f?sico-qu?mica, capacidade imunomoduladora e preven??o da forma??o do biofilme dental

SOUSA, Mayara Brito de
Fonte: Universidade Federal do Pará Publicador: Universidade Federal do Pará
Tipo: Dissertação de Mestrado
POR
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A esp?cie Pyrostegia venusta ? uma liana trepadeira popularmente conhecida como flor-de-S?o-Jo?o. ? utilizada na medicina popular para o tratamento de diversas doen?as. Na literatura cient?fica, v?rios compostos bioativos j? foram isolados e algumas atividades biol?gicas importantes, como a atividade antimicrobiana e imunomoduladora, j? foram atribu?das a esta esp?cie. A c?rie e a doen?a periodontals?o as doen?as bucais mais prevalentes na popula??o brasileira, sendo o biofilme dental o seu fator etiol?gico prim?rio. A candid?ase oral ocorre devido ? infec??o por esp?cies do g?nero Candida que, em determinadas situa??es, podem se comportar como pat?genos oportunistas. O objetivo deste trabalho foi realizar um estudo f?sico, qu?mico e biol?gico da esp?cie vegetal Pyrostegia venusta e investigar seu potencial na preven??o das principais doen?as bucais. Foram realizados ensaios de citotoxicidade do extrato bruto e fra??es em c?lulas mononucleares do sangue perif?rico e em macr?fagos murinos. Para avaliar a atividade imunomoduladora do extrato bruto e fra??es, foi realizada dosagem de ?xido n?trico (NO) produzido por macr?fagos estimulados com lipopolissacar?deo (LPS). Foi realizado ensaio de microdilui??o em caldo para determinar a concentra??o inibit?ria m?nima (CIM)...

Avalia????o de componentes da dieta de Pontoporia blainvillei Gervais & d Orbigny, 1844 (Cetacea, Pontoporiidae) como poss??veis hospedeiros intermedi??rios ao parasitismo por helmintos; Avalia????o de componentes da dieta de Pontoporia blainvillei Gervais & d Orbigny, 1844 (Cetacea, Pontoporiidae) como poss??veis hospedeiros intermedi??rios ao parasitismo por helmintos

SILVEIRA, Tony Leandro Rezende da
Fonte: Universidade Federal de Pelotas; Biologia; Programa de P??s-gradua????o em Parasitologia; UFPel; BR Publicador: Universidade Federal de Pelotas; Biologia; Programa de P??s-gradua????o em Parasitologia; UFPel; BR
Tipo: Dissertação Formato: application/pdf
POR
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Pontoporia blainvillei is a cetacean popularly know in Brasil as toninha. Its distribution is restrict for estuarine and coastal waters of south-west of Atlantic. Studies of gastrintestinalparasitology of toninhas indicate a component community formed for less species, including nematodes, trematodes and acantocephalans. However, despite knowing that the course of infection is the ingestion of infected prey, intermediate hosts are unknown. The toninhas s diet is composed mainly for fishes, squids and shrimps. Many of these fishes in various areas of distribution of the cetacean have been reported with parasites that attack the species in some stage of development. However, larval forms of the trematode Synthesium pontoporiae and the acantocephalan Bolbosoma turbinella were not identified in any of the food items of P. blainvillei. The present study aimed to evaluate three components of the diet of P. blainvillei as possible sources transmission of parasitiasis. Fifty specimens of Doryteuthis sanpaulensis; forty-three specimens of Paralonchurus brasiliensis and fifty specimens of Trachurus lathami were necropsied. The organs were individually, washed in tamis (150μm) and examined under a stereomicroscope. Helminths were collected...

Octupole transitions in the 208Pb region

Podolyák, Zs; Shand, C M; Wilson, E; Brown, B A; Grawe, H; Chiara, C J; Zhu, S; Fornal, B; Janssens, R V F; Bowry, M; Bunce, M; Carpenter, M P; Cieplicka, N; Deo, A Y; Dracoulis, G D; Hoffman, C R; Kempley, R S; Kondev, F G; Lane, G J; Lauritsen, T; Lota
Fonte: IOP Publishing Publicador: IOP Publishing
Tipo: Conference paper Formato: 6 pages
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The 208Pb region is characterised by the existence of collective octupole states. Here we populated such states in 208Pb + 208Pb deep-inelastic reactions. γ-ray angular distribution measurements were used to infer the octupole character of several E3 transitions. The octupole character of the 2318 keV 17− → 14+ in 208Pb, 2485 keV 19/2 − → 13/2 + in 207Pb, 2419 keV 15/2 − → 9/2 + in 209Pb and 2465 keV 17/2 + → 11/2 − in 207Tl transitions was demonstrated for the first time. In addition, shell model calculations were performed using two different sets of two-body matrix elements. Their predictions were compared with emphasis on collective octupole states.; This work is supported by the Science and Technology Facilities Council (STFC), UK, US Department of Energy, Office of Nuclear Physics, under Contract No. DEAC02-06CH11357 and DE-FG02-94ER40834, NSF grant PHY-1404442.