Vasoactive intestinal peptide (VIP) receptors were investigated in rat peritoneal macrophage membranes (RPMM) using [125I]VIP as ligand. The receptor binding was rapid, reversible, saturable, specific, and dependent on time, temperature, and membrane concentration. The Scatchard analysis of binding data was consistent with the existence of two classes of VIP binding sites with Kd values of 0.60...

Bismuth (Bi)-doped aluminosilicate, phosphosilicate, germanosilicate and high (⩾50 mol%) fibers have shown luminescence around 1.15 μm, 1.3 1.45 μm 1.7 respectively. Bi-doped paved the way for developing optical amplifiers fiber lasers in wavelength region of 1150–1500 nm 1600–1700 nm, where it can serve a wide range applications astronomy, imaging, medicine advanced communications. However, sp...

Highly-doped “mixed” transparent sesquioxide ceramics, 10 at.% Yb:(Lu2/3Sc1/3)2O3, are fabricated by vacuum sintering at 1700 °C followed hot isostatic pressing (HIPing) 1680 and 200 MPa. The ceramics of single-phase nature with a cubic (C-type, = 10.191 Å) structure mean grain size 0.66 μm. They feature high low-signal transmission 79.0% 1.20 Yb3+ ions in exhibit strong inhomogeneous broadenin...

Context. A crucial issue in star formation is to understand the physical mechanism by which mass is accreted onto and ejected by a young star. To derive key constraints on the launching point of the jets and on the geometry of the winds, the visible spectropolarimeter VEGA installed on the CHARA optical array can be an efficient means of probing the structure and the kinematics of the hot circu...

We have designed and synthesized two radioiodinated analogs of hexadecylphosphocholine in order to evaluate their tumor imaging potential. 12-(m[125I]iodophenyl)dodecyl phosphocholine (NM-324) and hexadecyl-2-[N,N-dimethyl-N-(m[125I]iodobenzyl)-ammonium] ethyl phosphate (NM-326) demonstrated the ability of such compounds to localize in and thereby visualize the Walker 256 tumor in rats. However...

Four different stefin-type cysteine proteinase inhibitors have been isolated from porcine thymus and skin. Amino acid sequence determination revealed the presence of stefin A and stefin B type inhibitors and two new inhibitors, designated as porcine stefin D1 and stefin D2. Stefin D1 was identified as PLCPI, an inhibitor recently characterized from porcine polymorphonuclear leukocytes [Lenarcic...

We built a transient absorption spectrophotometer that can determine transient absorption spectral changes that occur at times as fast as approximately 200 ns and as slow as a minute. The transient absorption can be induced by a temperature-jump (T-jump) or by optical pumping from the deep ultraviolet (UV) to the infrared (IR) by use of single ns Nd:YAG laser pulses. Our use of a fiber-optic sp...

Direct band electroluminescence (EL) from tensile-strained Si0.13Ge0.87/Ge multiple quantum wells (MQWs) on a Ge virtual substrate (VS) at room temperature is reported herein. Due to the competitive result of quantum confinement Stark effect and bandgap narrowing induced by tensile strain in Ge wells, electroluminescence from Γ1-HH1 transition in 12-nm Ge wells was observed at around 1550 nm. A...

Abstract Despite its importance, few instruments are able to measure the angular distribution of solar spectrum with a high spectral and temporal resolution. We present novel characterization method multi-directional entrance optics AMUDIS (Advanced MUltiDIrectional Spectroradiometer) which is multidirectional spectroradiometer based on three CCD image sensors combined imaging spectrographs. Th...