A comparative study of three strategies used to synthesize well-defined carboxyl-end-capped polystyrenes is reported. Structural characterization was carried out using a combination of thin-layer chromatography (TLC) and matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS). For the reaction of polystyryl anions with 4-bromo-1,1,1-trimethoxybutane, in addit...

5-Bromouracil (BU)-tolerant mutants of Bacillus subtilis 23 (thy his) have been isolated. Several classes of tolerant mutants were obtained by a sequential selection procedure. The classes can be distinguished by their relative BU tolerance as well as several other phenotypic characteristics. The mutants can grow for an extended period of time in minimal medium supplemented with amino acids and...

Busulfan (BU) is a widely used myeloablative and antineoplastic agent in clinical bone marrow transplantation (BMT). The lower incidence of BU-associated toxicities and lower therapeutic effectiveness in young children given BU doses based on body weight (ie, 16 mg/kg) is associated with altered pharmacokinetics of BU; the area under the curve (AUC) of BU concentration versus time is significan...

A new method for the preparation o f monoalkylamides o f composition Cp'TiCl2N H R is reported. Me3SnNHR (R = /Bu la , CH/Pr-, lb ) reacts with Cp'TiCl3 with elimination o f M e3SnCl to yield Cp'TiCLNHR (2) (2a: Cp' = C5H 5, R = /Bu, 2b: Cp' = Me3SiC5H4, R = t Bu, 2c: Cp' = (M e3Si)?C5H3, R = /Bu, 2d: Cp' = Me4C5H, R = /Bu, 2e: Cp' = Me5C5, R = t Bu, 2f: Cp' = C5H 5, R = CH/Pr2, 2g: Cp' = M e3S...

With asynchronous packet arrivals, we nd that, when the number of packet its is close to the fan-in of the crossbar switch, performance of a non-multiport central bu er switch becomes comparable to its multiport counterpart. Assuming the same amount of bu er memory, simulations of oblivious routing on hypercube indicate that split input bu ering outperforms central bu ering, even when dedicated...

Fast Fourier Transform (FFT) processors employed with pipeline architecture consist of series of Processing Elements (PE) or Butterfly Units (BU). BU or PE of FFT performs multiplication and addition on complex numbers. This paper proposes a single BU to compute radix-2, 8 point FFT in the time domain as well as frequency domain by replacing a series of PEs. This BU comprises of fused floating ...

BACKGROUND Buruli ulcer (BU), caused by Mycobacterium ulcerans (M. ulcerans), is a necrotizing skin disease found in more than 30 countries worldwide. BU incidence is highest in West Africa; however, cases have substantially increased in coastal regions of southern Australia over the past 30 years. Although the mode of transmission remains uncertain, the spatial pattern of BU emergence in recen...

Risk factors for Buruli ulcer (BU) are poorly understood. We conducted a case-control study in southern Benin to investigate the association between haemoglobin variants S or C and BU, and particularly the association between haemoglobinopathies HbSS/SC and BU osteomyelitis. We compared the haemoglobin genotype of 179 patients with BU and 44 with BU osteomyelitis to that of 242 community contro...

This paper presents an approach for analyzing security-critical software for vulnerability to bu er overrun attacks. In practice, bu er overruns are a commonly exploited attack against security-critical software systems. Bu er overrun attacks are made possible by aws in designing and implementing software. This paper describes a software analysis tool that dynamically analyzes software source c...

The synthesis and characterisation of several sodium zincate complexes are reported. The all-alkyl monomeric sodium zincate, (PMEDTA)·Na(μ-CH2SiMe3)Zn(t)Bu22, is prepared by combining equimolar quantities of (t)Bu2Zn, (n)BuNa and PMDETA (N,N,N',N'',N''-pentamethyldiethylenetriamine)]. A similar approach was used to prepare and isolate the unusual dimeric zincate [(PMEDTA)·Na(μ-(n)Bu)Zn(t)Bu2]23...