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Prostate visualization studies in males homozygous and heterozygous for 5 alpha-reductase deficiency
(The Journal of Clinical Endocrinology & Metabolism, 1992-10-01)
Male pseudohermaphrodites with 5 alpha-reductase deficiency have ambiguous genitalia and nonpalpable prostates on rectal examination, suggesting the dihydrotestosterone dependency of these structures. To clearly delineate ...
Luteinizing hormone pulsatility in subjects with 5-alpha-reductase deficiency and decreased dihydrotestosterone production
(PulbMed, 1994-04)
The pattern of LH pulsatility in male pseudohermaphrodites with inherited 5 alpha-reductase-2 deficiency (5 alpha RD) and decreased levels of plasma dihydrotestosterone was compared to that in normal males. Analysis of ...
X-ray fluorescence characterization of ming-dynasty porcelain rescued from a spanish shipwreck
(wiley, 1992-02)
A radioisotope induced X-ray fluorescence method was used to measure trace elements in Ming porcelain. Thirty pieces of blue-and-white Chinese porcelain, belonging to the Ch'eng Hua reign (AD 1465-87) and rescued from a ...
A compton peak method for incident angle determination in XRF with annular excitation
(X-Ray Spectrometry, 1992)
Established methods for measuring the incident angle related to XRF when radioisotope annular sources are involved are briefly discussed. As an alternative technique, a direct measurement of the incident angle from the ...
Acanthamoeba keratitis. Contact lens and noncontact lens characteristics
(Ophthalmology ., 1995-09)
To identify potential differences in time to diagnosis and final visual outcome between contact lens and noncontact lens users with Acanthamoeba keratitis. Prior studies have shown early diagnosis and therapy to be related ...
Mössbauer and X-ray fluorescence study of sediments from Samana Bay, Dominican Republic
(Journal of Radioanalytical and Nuclear Chemistry, 1995-08)
The chemical state of iron in sediments collected from Samana Bay has been determined by Mössbauer spectroscopy. The Mössbauer spectra were composed of two paramagnetic doulets, which correspond to high=spin ferric and ...
4-Hydroxyphenylpropan-7,8-diols and derivatives from Narvalina domingensis
(Phytochemistry, 1996)
Investigation of a Haitian medicinal plant, Narvalina domingensis, afforded, erythro- and threo-4-hydroxyphenylpropan-7,8-diol and their 7-O- methyl ether, 7-O-ethyl ethers and 4-O-isovaleric acid esters. The structures ...
Adaptive digital access protocol: a MAC protocol for multiservice broadband access networks
(IEEE Communications Magazine, 1996-03)
The authors describe a protocol that can adapt to the changing demands of a mix of synchronous transfer mode (STM) and asynchronous transfer mode (ATM) applications and efficiently allocate bandwidth to a variety of bursty ...
Levels of chlorinated hydrocarbons and trace metals in bivalves and nearshore sediments from the Dominican Republic
(Marine Pollution Bulletin, 1998-12)
Bivalves (Crassostrea rizhophorae, Isognomon alatus, Codakia orbicularis Linné, and Tellina fausta) and sediment samples collected from 12 locations along the Dominican Republic coastline were used to assess the degree of ...
Trace element determination of mercury by total-reflection X-ray fluorescence
(Spectrochimica Acta Part B: Atomic Spectroscopy, 1997-07-01)
A rapid and simple method is presented for the determination of trace amounts of ionic mercury in solutions by total-reflection X-ray fluorescence. The method relies on the formation of a mercury amalgam on a 50 nm thick ...