Efficient nanocoax-based solar cells Naughton, M. J.; Kempa, K.; Ren, Z. F. ...
Physica status solidi. PSS-RRL. Rapid research letters,
July 2010, Volume:
4, Issue:
7
Journal Article
Background & Aims: Remission of several autoimmune diseases has been described after allogeneic marrow transplantation. The aim of this study was to determine if the natural history of Crohn's ...disease was altered by hematopoietic cell transplants from healthy allogeneic donors.
Methods: Between 1982 and 1992, 6 patients with Crohn's disease and leukemia underwent allogeneic marrow transplantation and were followed up clinically.
Results: Five patients had active Crohn's disease before transplantation, and 3 had clinical evidence of sclerosing cholangitis. Four marrow donors were HLA-identical siblings, 1 related donor was mismatched at the DR locus, and 1 unrelated donor was HLA-matched. One patient died of septicemia 97 days after transplantation; 5 patients were observed for 4.5, 5.8, 8.4, 9.9, and 15.3 years after transplantation. Four of 5 patients evaluated had no signs or symptoms of Crohn's disease after transplantation. One patient with mixed donor-host hematopoietic chimerism had a relapse of Crohn's disease 1.5 years after transplantation.
Conclusions: Four of 5 patients followed up for 4.5 to 15.3 years after allogeneic hematopoietic cell transplantation remained free of Crohn's disease. These observations suggest that host immune dysregulation plays a role in the perpetuation of Crohn's disease that can be corrected by allogeneic hematopoietic cell transplantation.
GASTROENTEROLOGY 1998;114:433-440
A new approach to reduce phosphorous contamination in the intrinsic layer during the deposition of amorphous silicon (a-Si:H) n–i–p solar cells prepared in single-chamber reactors is presented. This ...novel process consists of a hydrogen etching plasma performed after the n-layer deposition, which prevents a recycling of phosphorous from the reactor walls when exposed to a hydrogen-rich plasma during the subsequent i-layer deposition. The implemented process reduces the phosphorous cross-contamination in the i-layer, as corroborated by secondary ion mass spectroscopy measurements. Furthermore, the end of the etching process can be easily monitored by measuring the DC bias voltage at the powered electrode. By applying this process, we were able to improve the fill factor from 70% up to 75%, without degradation in the other parameters of the cell, neither in the initial nor in the stabilized state. Finally, by implementing this process in a-Si:H/a-Si:H tandem solar cells we obtained an initial efficiency of 10.3% (
V
oc=1.76
V, FF=74.5%,
J
sc=7.8
mA
cm
−2); light soaking test resulted in a stabilized efficiency of 8.5%.
Display omitted
► During the i-layer deposition in a single-chamber reactor, phosphorous is recycled from the n-layer on the chamber walls. ► Previous etching of this n-layer reduces phosphorous contamination in the i-layer. ► The end point of the n-layer etching process is monitored by measuring the DC bias voltage. ► An improvement in the FF is observed due to the reduction of phosphorous contamination in the i-layer.
Twenty-four new insertions were obtained from seven different locations in the nuclear 18S rDNA for seven species of the lichen-forming fungal genus PHYSCONIA: They were analyzed allowing for ...terminal sequence conservation by adopting a flexible approach to exact insertion site position, and they were compared with 12 previously reported small insertion sequences from the 18S ribosomal RNA gene. Such insertions have previously been proposed to be degenerate self-splicing group I introns; however, the methodology used here identified consensus terminal sequences characteristic of spliceosomal introns. This finding is the first suggestion that multiple spliceosomal introns occur in ribosomal genes.
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