104 48/372 C

Angiogenic imbalance contributes to the development of preeclampsia. We evaluated the protein expression of the proangiogenic placental growth factor (PlGF) and transforming growth factor beta 1 (TGF-β 1) compared with the anti-angiogenic soluble fms-like tyrosine kinase receptor (sFlt1) and soluble endoglin (sEng) in HIV-infected normotensive and pre-eclamptic pregnancies. Dependencies & Prerequisites Import and set ups. Toggle code%matplotlib inline import matplotlib as mpl from matplotlib import pylab as plt import matplotlib.dates as mdates import seaborn as sns import collections import numpy as np import tensorflow.compat.v2 as tf import tensorflowprobability as tfp from tensorflowprobability import distributions as tfd from tensorflowprobability import.

1. 104 48/372 Cove
2. = 3.12170985e10 M / S
3. 104 48/372 Camino

Constraints on changes in the proton-electron mass ratio using methanol lines.

Abstract

We report Karl G. Jansky Very Large Array (VLA) absorption spectroscopy in four methanol (CH₃OH) lines in the z = 0.885 82 gravitational lens towards PKS1830-211. Three of the four lines have very different sensitivity coefficients K_μ to changes in the proton-electron mass ratio μ; a comparison between the line redshifts thus allows us to test for temporal evolution in μ. We obtain a stringent statistical constraint on changes in μ by comparing the redshifted 12.179 and 60.531 GHz lines, [∆μ/μ] ≤ 1.1 × 10^-7 (2σ) over 0 < z ≤ 0.885 82, a factor of ≈2.5 more sensitive than the best earlier results. However, the higher signal-to-noise ratio (by a factor of ≈2) of the VLA spectrum in the 12.179 GHz transition also indicates that this line has a different shape from that of the other three CH₃OH lines (at >4σ significance). The sensitivity of the above result, and that of all earlier CH₃OH studies, is thus likely to be limited by unknown systematic errors, probably arising due to the frequency-dependent structure of PKS1830-211. A robust result is obtained by combining the three lines at similar frequencies, 48.372, 48.377 and 60.531 GHz, whose line profiles are found to be in good agreement. This yields the 2σ constraint [∆μ/μ] ≲ 4 × 10^-7, the most stringent current constraint on changes in μ. We thus find no evidence for changes in the proton-electron mass ratio over a lookback time of ≈7.5 Gyr.

104 48/372 Cove

= 3.12170985e10 M / S

• atomic processes;
• galaxies: high-redshift;
• galaxies: individual: PKS1830-211;
• quasars: absorption lines;
• radio lines: galaxies;
• Astrophysics - Cosmology and Nongalactic Astrophysics;
• Astrophysics - Astrophysics of Galaxies

104 48/372 Camino