Broad and Narrow Intrinsic Absorption in Quasars as it Relates to Outflows, Orientation, and Radio Properties

2021 ◽  
Author(s):  
Robert Bernard Stone
Keyword(s):  
1977 ◽  
Vol 10 (13) ◽  
pp. 1871-1876 ◽  
Author(s):  
Ahmar Raza ◽  
O P Agnihotri ◽  
B K Gupta

2018 ◽  
Vol 7 (4) ◽  
pp. 225-242 ◽  
Author(s):  
Doris Ehrt

Abstract Materials with high deep-ultraviolet (DUV; λ<300 nm) transmission are important for many industrial applications. Fluoride single crystals and various glasses, pure SiO2, fluoride, phosphate, multicomponent silicates, and organic materials (PMMA), were investigated. The role of intrinsic absorption (UV edge) due to electron transitions between the main components, and extrinsic absorption due to trace impurities, effect of polyvalent ions, redox behavior, and radiation-induced transmission loss were considered. The optical basicity and optical properties were used to order the materials.


1976 ◽  
Vol 230 (2) ◽  
pp. 286-290 ◽  
Author(s):  
RJ Hamburger ◽  
NL Lawson ◽  
JH Schwartz

Previous investigations have suggested that there is a functional heterogeneity along the length of the proximal convoluted tubule. This study was designed to confirm and extend these suggestions by examining the intrinsic absorption of fluid and the effect of parathyroid hormone (PTH) on net fluid absorption in isolated, anatomically defined segments of rabbit superficial proximal tubules. The EPCT (early proximal convoluted tubule), LPCT (late proximal convoluted tubule), and PR (pars recta) segments were studied under controlled conditions by the isolated perfused tubule technique. In 23 EPCT, base-line fluid absorption was 1.38 +/- 0.04 (SE), a rate significantly higher than those of 11 LPCT (0.62 +/- 0.02; P less than 0.001) and 12 PR (0.52 +/- 0.03 nl mm-1 min-1, P less than 0.001) segments. In 10 EPCT, mean control fluid absorption was 1.31 +/- 0.04 nl mm-1 min-1; addition of PTH resulted in a decrease to 0.95 +/- 0.05 nl mm-1 min-1 (P less than 0.001); and, after removal of PTH, fluid absorption increased (P less than 0.001). Parathyroid hormone had no effect on either seven LPCT segments or six PR segments. These results demonstrate differences in intrinsic capacity to absorb fluid by anatomically defined segments of the rabbit proximal tubule. This functional heterogeneity is further supported by the observed differential response to PTH by the various anatomic segments of the proximal tubule.


2001 ◽  
Vol 557 (1) ◽  
pp. 2-17 ◽  
Author(s):  
M. J. Collinge ◽  
W. N. Brandt ◽  
Shai Kaspi ◽  
D. Michael Crenshaw ◽  
Martin Elvis ◽  
...  

2001 ◽  
Vol 562 (1) ◽  
pp. L29-L33 ◽  
Author(s):  
D. M. Crenshaw ◽  
S. B. Kraemer
Keyword(s):  

2018 ◽  
Vol 57 (11) ◽  
pp. 2804 ◽  
Author(s):  
Longfei Xiao ◽  
Xianglong Yang ◽  
Peng Duan ◽  
Huayong Xu ◽  
Xiufang Chen ◽  
...  

2002 ◽  
Vol 567 (1) ◽  
pp. 58-67 ◽  
Author(s):  
Martijn de Kool ◽  
Robert H. Becker ◽  
Michael D. Gregg ◽  
Richard L. White ◽  
Nahum Arav
Keyword(s):  

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