Haze is a serious issue in China with increasing concerns, and understanding the factors driving decadal-scale variations in haze occurrence is relevant for government policymaking. Using a comprehensive observational haze dataset, we demonstrate notable decadal fluctuations in the number of haze days (HD) during winter in central eastern China, showing a decline since the mid-1980s. The leadin...

iced tea is a world popular beverage,for example about 80% of people in italy and united states, consume iced tea as a thirsty-quenching beverage. however, it is also believed that iced tea contains health benefit components. process of iced tea involved tea solid extraction and then mixing with edible acids, flavors, sugar or non-nutritional sweeteners. in this research, regarding to the deman...

Triton is the largest moon of Neptune system and possesses a thin nitrogen atmosphere with trace amounts carbon monoxide methane, making it similar composition to that dwarf planet Pluto. Like Pluto Saturn's Titan, has haze layer thought be composed organics formed through photochemistry. Here, we perform atmospheric chamber experiments 0.5% 0.2% methane in molecular at 90 K 1 mbar generate ana...

purpose : to compare the postoperative results of epi-lasik and photorefractive keratectomy-mitomycin (prk-mitomycin) in patients with moderate to high myopia methods : for this double-blind clinical trial, samples were randomly selected among those subjects above 20 years of age who were visited for myopia correction and had a spherical equivalent between -4 to -8 d. we randomly performed prk-...

OBJECTIVES To compare topical interleukin 1 receptor antagonist (IL-1ra) to steroid treatment following photorefractive keratectomy (PRK) in rabbit eyes. METHODS Our study is a randomized, investigator-masked study that was approved by the Institutional Animal Care and Use Committee. Following standard PRK, 48 eyes of 24 rabbits were divided into 5 arms: 4 treatment arms and 1 control arm. Th...

To casual observers, haze's visible effects on clear daytime skies may seem mundane: significant scattering by tropospheric aerosols visibly (1) reduces the luminance contrast of distant objects and (2) desaturates sky blueness. However, few published measurements of hazy-sky spectra and chromaticities exist to compare with these naked-eye observations. Hyperspectral imaging along sky meridians...