Towards Room Temperature Thermochromic Coatings with controllable NIR-IR modulation for solar heat management & smart windows applications.

Solar heat management & green air-conditioning are among the major technologies that could mitigate heat islands phenomenon while minimizing significantly the CO global foot-print within the building & automotive sectors. Chromogenic materials in general, and thermochromic smart coatings especially are promising candidates that consent a noteworthy dynamic solar radiation Infrared (NIR-IR) regulation and hence an efficient solar heat management especially with the expected increase of the global seasonal temperature. Within this contribution, two major challenging bottlenecks in vanadium oxide based smart coatings were addressed.

On the remarkable nonlinear optical properties of natural tomato lycopene.

In line with the renewed interest in developing novel Non Linear Optical (NLO) materials, natural Lycopene's NLO Properties are reported for the first time within the scientific literature. Correlated to its 1-D conjugated π-electrons linear conformation, it is shown that natural Lycopene exhibits a significantly elevated 3rd order nonlinearity χ as high as 2.65 10 esu, the largest value of any investigated natural phyto-compound so far, including β-carotene.

Volatile Composition and Biological Activity of Jordanian Commercial Samples of L. Fruits.

The present paper reports the GC-HS-SPME analysis of volatile emission and GC-MS analysis of chemical composition of essential oil of fruits of eight different samples of L. fruits ("sumac" folk name), collected from Jordanian agricultural field and the local market. The analyses show an important variability among the Sumac samples probably due to the origin, cultivation, harvesting period, drying, and conservation of the plant material.

VO-based active tunable emittance thermochromic flexible coatings.

This contribution reports, for what we believe is the first time, on -based thin-film coatings on flexible Al substrates exhibiting a tunable positive emittance-switching =(-)>0. More precisely, a layered stack of a-:// on flexible Al sheets presents minimum and maximum values of emissivity of about 0.18 and 0.

Exploration of adverse psychological symptoms in Yemeni khat users by the Symptoms Checklist-90 (SCL-90).

Aim: The present study was aimed at assessing associations between psychological symptoms and khat use in the Yemeni population.

Setting: The survey was performed in 2000/2001, in different zones including three urban and three rural areas.

Participants: The survey was carried out in 800 Yemeni adults (15-76), both male and female, representing mainly urban populations of students, state employees and housewives.