Search for violation of Lorentz invariance in top quark pair production and decay.

Using data collected with the D0 detector at the Fermilab Tevatron Collider, corresponding to 5.3 fb(-1) of integrated luminosity, we search for violation of Lorentz invariance by examining the tt[over ¯] production cross section in lepton+jets final states. We quantify this violation using the standard-model extension framework, which predicts a dependence of the tt[over ¯] production cross section on sidereal time as the orientation of the detector changes with the rotation of the Earth.

Catalytic deoxyribozyme-modified nanoparticles for RNAi-independent gene regulation.

DNAzymes are catalytic oligonucleotides with important applications in gene regulation, DNA computing, responsive soft materials, and ultrasensitive metal-ion sensing. The most significant challenge for using DNAzymes in vivo pertains to nontoxic delivery and maintaining function inside cells. We synthesized multivalent deoxyribozyme "10-23" gold nanoparticle (DzNP) conjugates, varying DNA density, linker length, enzyme orientation, and linker composition in order to study the role of the steric environment and gold surface chemistry on catalysis.

Combined pulmonary fibrosis and emphysema in a tyre industry worker.

We report a case of combined pulmonary fibrosis and emphysema (CPFE) with severe pulmonary hypertension in a 46-year-old man, nonsmoker, tyre industry worker. CPFE is commonly reported to be associated with tobacco smoking. This case highlights the possible role of environmental dust exposure (talc) in the pathogenesis of the disease and confirms the clinical characteristics of CPFE described in previous studies.

Coalescent method in conjunction with niche modeling reveals cryptic diversity among centipedes in the Western Ghats of South India.

Background: There has been growing interest in integrative taxonomy that uses data from multiple disciplines for species delimitation. Typically, in such studies, monophyly is taken as a proxy for taxonomic distinctiveness and these units are treated as potential species. However, monophyly could arise due to stochastic processes.

Visuospatial perception: an emerging biomarker for Alzheimer's disease.

In recent years, the focus of research on Alzheimer's disease (AD) has shifted toward finding reliable diagnostic biomarkers that enable accurate detection of mild cognitive impairment (MCI) as well as AD. Functional magnetic resonance imaging (fMRI) has the potential to identify functional changes in the preclinical stages of AD. In addition to the cardinal deficits in memory, deficits in visuospatial cognition are pervasive in AD.

Imaging calcific concretions of pulmonary alveolar microlithiasis with PET: insight into disease pathophysiology.

A case of 18F-FDG PET in pulmonary alveolar microlithiasis with bilateral reticulonodular opacities in the middle and lower zones on routine chest roentgenogram and calcification in the peribronchovascular interstitium,peribronchovascular and subpleural intralobular septal regions, and visceral pleura on high-resolution chest CT is presented. 18F-fluoride PET demonstrated intense tracer uptake in the lower zone of both lungs corresponding to CT findings. Minimal FDG activity in areas of dense calcification suggests minimal or no inflammation.

FDG uptake in unilateral breast related to breastfeeding practice in a patient of pulmonary hydatid cyst.

Unusual FDG uptake in unilateral breast on FDG PET study in a 32-year-old lactating woman with recent diagnosis of left upper lobe hydatid cyst is described. The FDG PET study demonstrated uptake in the periphery of the lesion corresponding to the hydatid cyst. In addition, there was an unusually intense FDG tracer uptake in the right breast.

Measurements of WW and WZ production in W + jets final states in pp collisions.

We study WW and WZ production with ℓνqq (ℓ=e,μ) final states using data collected by the D0 detector at the Fermilab Tevatron Collider corresponding to 4.3  fb(-1) of integrated luminosity from pp collisions at sqrt[s]=1.96  TeV.

Measurement of the W boson mass with the D0 detector.

We present a measurement of the W boson mass using data corresponding to 4.3  fb(-1) of integrated luminosity collected with the D0 detector during Run II at the Fermilab Tevatron pp collider. With a sample of 1,677,394 W → eν candidate events, we measure M(W) = 80.

Search for universal extra dimensions in pp collisions.

We present a search for Kaluza-Klein (KK) particles predicted by models with universal extra dimensions (UED) using a data set corresponding to an integrated luminosity of 7.3 fb(-1), collected by the D0 detector at a pp center-of-mass energy of 1.96 TeV.

Search for charged massive long-lived particles.

We report on a search for charged massive long-lived particles (CMLLPs), based on 5.2  fb(-1) of integrated luminosity collected with the D0 detector at the Fermilab Tevatron pp collider. We search for events in which one or more particles are reconstructed as muons but have speed and ionization energy loss (dE/dx) inconsistent with muons produced in beam collisions.

Regulation of mat responses by a differentiation MAPK pathway in Saccharomyces cerevisiae.

Fungal species exhibit diverse behaviors when presented with extracellular challenges. Pathogenic fungi can undergo cell differentiation and biofilm formation in response to fluctuating nutrient levels, and these responses are required for virulence. In the model fungal eukaryote Saccharomyces cerevisiae, nutrient limitation induces filamentous growth and biofilm/mat formation.

A survey on etiopathological correlation of Krimi (intestinal helminths) and Pandu (anemia).

A survey study was aimed to find etiopathological status of intestinal helminths and also to accomplish its association with clinical condition Pandu. The survey samples included population of five schools and two localities in and around Jamnagar. The study was conducted on 337 subjects, of whom 36.

Evidence for spin correlation in t ̅t production.

We present a measurement of the ratio of events with correlated t and t ̅t spins to the total number of t ̅t events. This ratio f is evaluated using a matrix-element-based approach in 729 t ̅t candidate events with a single lepton ℓ (electron or muon) and at least four jets. The analyzed p ̅p collisions data correspond to an integrated luminosity of 5.

Search for doubly charged Higgs boson pair production in pp¯ collisions at √s=1.96 TeV.

We present a search for pair production of doubly charged Higgs bosons in the processes qq¯→H(++)H(--) decaying through H(±±)→τ(±)τ(±),μ(±)τ(±),μ(±)μ(±). The search is performed in pp¯ collisions at a center-of-mass energy of √s = 1.96 TeV using an integrated luminosity of up to 7.

A directionally-selective neuromorphic circuit based on reciprocal synapses in Starburst Amacrine Cells.

Starburst Amacrine Cells (SACs) play a major role in the detection of directional motion in the biological retina. The starburst amacrine cell has intrinsic electrical mechanisms for producing directional selectivity (DS). GABA transmitter-receptor interactions between two overlapping SACs make DS more robust.

Wγ production and limits on anomalous WWγ couplings in pp collisions at sqrt[s] = 1.96 TeV.

We measure the cross section and the difference in rapidities between photons and charged leptons for inclusive W(→lν) + γ production in eγ and μγ final states. Using data corresponding to an integrated luminosity of 4.2  fb(-1) collected with the D0 detector at the Fermilab Tevatron Collider, the measured cross section times branching fraction for the process pp → Wγ + X → lνγ + X and the distribution of the charge-signed photon-lepton rapidity difference are found to be in agreement with the standard model.