We point out that an apparent discrepancy between the values of αs(MZ) as determined from low versus high energy experiments can be explained if an electrically neutral coloured fermion exists which slows down the running of the strong coupling constant αs. Alexander von Humboldt Foundation Fellow. Permanent address: Institute of Nuclear Physics, Cracow, Poland, e-mail: JEZABEK@CHOPIN.IFJ.EDU.P...

In a recent paper [1], Caetano and Schulz (CS) claim that intrinsic DNA-correlations, due to the base pairing (A-T and C-G), lead to electron delocalization. Furthermore, they point out that there is a localization-delocalization transition (LDT) for certain parameter ranges. In this Comment we present analytical and numerical evidences that in their model all states are localized, thus excludi...

Amyloidpeptide (A ) is generated by -secretase, a membrane protein complex with an unusual aspartyl protease activity consisting of the four components presenilin, nicastrin, APH-1 and PEN-2. Presenilin is considered the catalytic subunit of this complex since it represents the prototype of the new family of intramembrane-cleaving GxGD-type aspartyl proteases. Recently, five novel members of th...

In this paper, we develop policies to prevent deadlocks in a decentralized modular materials flow. The system consists of locally controlled conveyor units (modules) that can be plugged together in order to flexibly interconnect materials flows within a given production area. The controller of each module is a local agent that follows its own specific control rules. The behavior of the overall ...

Surface defects acutely influence perovskite solar cell performance. In this issue of Matter, Wang et al. developed a novel and compelling molecular “defect indicator” approach, notable for minimizing surface evaluating passivation strategies. The performance metal halide cells has improved rapidly in the past decade, with certified power-conversion efficiency now exceeding 25%.1Yoo J.J. Seo G....

The activity of mammalian target of rapamycin complex 1 (mTORC1) is frequently enhanced in carcinomas, an effect thought to contribute to the malignant phenotype. Here, it is demonstrated that either deletion or mutation of TP53 in colon or lung carcinoma cells substantially enhances mTORC1 kinase activity by an effect downstream of and independent of AMPK. Mechanistically, it was determined th...

Building heights were estimated with relatively high accuracy using shadows in a set of single-look SPOT panchromatic and multispectral images taken from the same satellite simultaneously. Shadows cast b y rows of trees in SPOT images were first used to estimate mean heights of trees. Calibration lines were then constructed to relate the actual mean heights of rows of trees to the estimated hei...

Watermelon, Citrullus lanatus (Thunb.) Matsum & Nakai cv. Sugar Baby, were grown in the field as a fall crop in open-top chambers (OTC) in southwestern Indiana with either charcoal-filtered (CF) or nonfiltered (NF) air. Ozone and sulfur dioxide were continuously monitored in OTC and ambient air. There was a significant decrease in marketable yield by weight (19.9%, P = 0.05), percentage of mark...

Dencker D et al. Image Fusion and Electromagnetic ... Ultrasound International Open 2015; 1: E30–E31 ∙ DOI 10.1055/s-0035-1555862 Image Fusion and Electromagnetic Needle Tracking for the Biopsy of Pelvic Lesions – Report of 2 Cases Discussion ▼ This is the first case report describing image fusion and electromagnetic needle tracking for the biopsy of lymph nodes in the pelvis in patients with a...

Clinical Infectious Diseases 1997;25:939 SIR—We read with interest the article by Murdoch et al. [1], q 1997 by The University of Chicago. All rights reserved. 1058–4838/97/2504–0035$03.00 which described the use of PCR to detect Legionella DNA in urine and serum samples from patients with pneumonia. We have previously used the PCR method to detect Legionella DNA in respiratory samples [2]. In ...