Remote Estimation of the Chlorophyll Concentration of Living Trees Using Laser-induced Fluorescence Imaging Lidar

Monthly variation in chlorophyll concentration of living ginko tree leaves 65 m away from a system was remotely estimated by a laser-induced fluorescence imaging lidar. The combination of a pulsed laser and a short-time gated CCD using an image intensifier made it possible to monitor the weak fluorescence signal from the ginko tree leaves as an image. By applying the experimental idea that a ratio of intensity of the chlorophyll fluorescence at 740 nm to that at 685 nm showed a linear correlation to the chlorophyll concentration, the fluorescence image of the ginko tree obtained by the lidar was converted to the chlorophyll concentration distribution image.     

A first sub-stage in stage III in quenched pure aluminium studied by positron annihilation

It has been found for the first time by positron annihilation that the line-shape parameter h increases and subsequently decreases in the initial region of stage III annealing, below ≈-60°C, in quenched pure aluminium. It is deduced that the change in h parameter in this temperature region seems to correspond to the formation and sebsequent collapse of small vacancy clusters.     

Abnormal hepatobiliary clearance of 99mTc-N-(2,6-diethylphenylcarbamoylmethyl)iminodiacetic acid in the altered state of thyroid--by an analysis of deconvolution method

Hepatobiliary clearance of 99mTc-EHIDA was investigated in cases with altered thyroid function by deconvolution method. The results indicated that mean hepatic transit time of all control subjects revealed less than 10 minutes. On the other hand, mean hepatic transit time of cases with altered thyroid function revealed prolonged more than 13 minutes. Cases especially showing an elevated serum concentration of TSH compared with normal range (4.6 microU/ml) had a tendency of a high incidence of markedly prolonged mean hepatic transit time. These results suggest that thyroid hormone may influence on the hepatic metabolism of hepatobiliary radiopharmaceuticals. This phenomenon also could partly explain the cause of liver dysfunction seen in subjects with altered states.     

Chemical constituents of some biodegradable liquid scintillators

Chemical constituents of the commercially available "biodegradable" liquid scintillator solvents were elucidated by means of GC/MS analysis etc., as either the mixture of monosubstituted benzenes with the alkyl chain of carbon 10 to 13, or 1-(3,4-dimethylphenyl)-1-phenyl-ethane.     

Fortuneanosides G-L, dibenzofuran glycosides from the fruit of Pyracantha fortuneana

Six new dibenzofuran glycosides, fortuneanosides G (1), H (2), I (3), J (4), K (5), and L (6), were isolated from the fruit of Pyracantha fortuneana (MAXIM) LI. Their structures were determined to be 3,7-dihydroxy-2,4-dimethoxy-dibenzofuran 7-O-beta-D-glucopyranoside, 3,7-dihydroxy-2,4-dimethoxy-dibenzofuran 7-O-(alpha-L-rhamnopyranosyl)-(1-6)-beta-D-glucopyranoside, 3,6-dihydroxy-2,4-dimethoxy-dibenzofuran 6-O-beta-D-glucopyranoside, 2,4-dimethoxy-3,6,9-trihydroxy-dibenzofuran 6-O-beta-D-glucopyranoside, 3,9-dihydroxy-2,4-dimethoxy-dibenzofuran 3-O-beta-D-glucopyranoside, and 2-methoxy-3,4,9-trihydroxy-dibenzofuran 4-O-beta-D-glucopyranoside based on spectroscopic analysis. Fortuneanosides G-J showed more potent tyrosinase-inhibitory activity than arbutin.     

Li<Superscript>+</Superscript> ionic conduction properties on NaI doped with a small amount of LiBH<Subscript>4</Subscript>

In the present work, Li⁺ conductor is synthesized via small doping of LiBH₄ into “Li-free” compound (or solid solvent), NaI. The formation of solid solution between NaI and LiBH₄ is confirmed by XRD measurement, and the solubility limit of LiBH₄ exists between 6 to 13 mol%. The value of σ for 15NaI·LiBH₄ (6 mol% LiBH₄) showed 1.7 × 10^?6 S/cm at room temperature, which is comparable to that for LiI. From the plot of log σT vs. 1000/T, an activation energy for Li⁺ conduction in NaI is estimated to be 0.68 and 0.32 eV for heating and cooling cycle, respectively. The results of AC impedance measurement and DC polarization test indicate that Li⁺ plays a major role in ionic conduction in NaI regardless of the slight molar fraction of Li⁺. The present results suggest that the expansion in the material choice for solid solvent and other alkali halides can also work as a base material for Li⁺ ion conductors.