Molecular ontology of the parabrachial nucleus

This article has been removed because of a technical problem in the rendering of the PDF. 11 February 2022.

Midrapidity antiproton-to-proton ratio in pp collisons at sqrt[s]=0.9 and 7 TeV measured by the ALICE experiment

The ratio of the yields of antiprotons to protons in pp collisions has been measured by the ALICE experiment at sqrt[s]=0.9 and 7 TeV during the initial running periods of the Large Hadron Collider. The measurement covers the transverse momentum interval 0.45<p_{t}<1.05  GeV/c and rapidity |y|<0.5. The ratio is measured to be R_{|y|<0.5}=0.957±0.006(stat)±0.014(syst) at 0.9 TeV and R_{|y|<0.5}=0.991±0.005(stat)±0.014(syst) at 7 TeV and it is independent of both rapidity and transverse momentum. The results are consistent with the conventional model of baryon-number transport and set stringent limits on any additional contributions to baryon-number transfer over very large rapidity intervals in pp collisions.

Sequential quantum cloning

Not all unitary operations upon a set of qubits can be implemented by sequential interactions between each qubit and an ancillary system. We analyze the specific case of sequential quantum cloning, 1-->M, and prove that the minimal dimension D of the ancilla grows linearly with the number of clones M. In particular, we obtain D=2M for symmetric universal quantum cloning and D=M+1 for symmetric phase-covariant cloning. Furthermore, we provide a recipe for the required ancilla-qubit interactions in each step of the sequential procedure for both cases.

Loss of H-cadherin protein expression in human non-small cell lung cancer is associated with tumorigenicity

Abnormalities in the H-cadherin gene have been described in several human cancers. However, their biological significance remains undetermined. To investigate the role of H-cadherin in non-small cell lung cancer (NSCLC), a chimera H-cadherin-green fluorescent protein (GFP) expressed in Cos-7 cells was used to identify an anti-H- cadherin antibody, HCD-1. Western blot analysis was performed in six NSCLC cell lines and 35 pairs of primary NSCLC tumors and nonmalignant lung tissue obtained from surgical resections using HCD-1. Loss of H-cadherin expression was seen in five (83%) of the six NSCLC cell lines, whereas loss of E-cadherin was seen in three (50%) of the six. H-cadherin expression was lost in 15 (43%) of 35 NSCLC surgical tumor specimens, whereas E-cadherin expression was lost in 6 (17%) of 35. H-cadherin was expressed in all of the nonmalignant lung tissue from all of the surgical specimens. Fourteen of 35 tumors were heterotransplanted s.c. in nude mice. Tumorigenicity in nude mice was associated with both loss of H-cadherin expression (P = 0.03) and loss of E-cadherin expression (P = 0.05). Loss of H-cadherin was also associated with a more advanced local tumor growth, although the difference was not significant. The results indicate that loss of H-cadherin is frequent in human NSCLC and suggest that it facilitates the implantation and local growth of human NSCLC tumors.