This study uses molecular and cytogenetic methods to determine the origin of a B chromosome in some males of the wasp Trichogramma kaykai. This so-called paternal sex ratio (PSR) chromosome transmits only through sperm and shortly after fertilization triggers degeneration of the paternal genome, while keeping itself intact. The resulting embryos develop into haploid B-chromosome-carrying males....

Port Site Recurrence (PSR) following laparoscopic tumor resections has been reported for a variety of tumors. Though PSR is a rare phenomenon, they most commonly occur following nephroureterectomies for upper tract urothelial carcinoma. Herein we report a novel case of a PSR following a robotic assisted nephroureterectomy for the sarcomatoid variant of urothelial carcinoma of the upper urinary ...

PET with L-1-11C-tyrosine (TYR) can measure and quantify increased protein synthesis in tumor tissue in vivo. For quantification of the protein synthesis rate (PSR), arterial cannulation with repeated blood sampling to obtain the plasma input function and a dynamic TYR PET study to calculate a time–activity curve are necessary. In most PET studies the standardized uptake value (SUV) method is u...

BACKGROUND This study aimed to compare the efficacy and prognostic value of partial sensory rhizotomy (PSR) and microvascular decompression (MVD) for primary trigeminal neuralgia (PTN). MATERIAL AND METHODS From June 2010 to June 2012, 117 patients with PTN were recruited for the study, of which 52 cases were treated with MVD (the MVD group) and 65 cases were treated with PSR (the PSR group). V...

UNLABELLED PET with L-1-(11)C-tyrosine (TYR) can measure and quantify increased protein synthesis in tumor tissue in vivo. For quantification of the protein synthesis rate (PSR), arterial cannulation with repeated blood sampling to obtain the plasma input function and a dynamic TYR PET study to calculate a time-activity curve are necessary. In most PET studies the standardized uptake value (SUV...

Haematological indices were investigated in 261 patients with homozygous sickle cell disease, 29 of whom had developed proliferative sickle retinopathy (PSR). After allowing for age-related effects, male patients with high Hb (> 9 g/dl) and low HbF (< 5%) levels appeared to constitute a high risk group for PSR. This relationship was not evident in females, PSR being observed in patients with lo...

We present recent observations of three pulsars, PSR J1909-3744, PSR J1600-3053, and PSR J1022+1001, that demonstrate remarkable levels of timing precision and instrumental stability. Data were taken with CPSR2, a new baseband recording system at the Parkes radio telescope, during the first 12 months of operation.

Predictive state representations (PSRs) are powerful methods of modeling dynamical systems by representing state through observational data. Most of the current PSR techniques focus on learning a complete PSR model from the entire state space. Consequently, the techniques are often not scalable due to the dimensional curse, which limits applications of PSR. In this paper, we propose a new PSR l...

The PSR B1259–63 system contains a 47 ms radio pulsar in a highly eccentric binary with a Be-star companion. Strongly time variable X-ray emission was reported from this system as the pulsar was near apastron in 1992-early 1993. The variability was primarily deduced from an apparent non-detection of the PSR B1259-63 system during a first pre-apastron ROSAT observation in February 1992. We have ...

We report the discovery of two young isolated radio pulsars with very high inferred magnetic fields. PSR J1119−6127 has period P = 0.407 s, and the largest period derivative known among radio pulsars, Ṗ = 4.0×10−12. Under standard assumptions these parameters imply a characteristic spin-down age of only τc = 1.6 kyr and a surface dipole magnetic field strength of B = 4.1× 1013 G. We have measur...