Template-dependent hydrophobicity in mesoporous organosilica films

A template dependence of the degree of self-hydrophobization of methylene-bridged periodic mesoporous organosilica (PMO) films is reported. The film with the smallest pore size of 1.7 nm, templated by CTAC, results in higher hydrophilicity when compared to films with a pore size of 4.1 or 5.3 nm, templated by BrijL4 and BrijS10, respectively. Both the surface and the bulk hydrophilicity were evaluated by water contact angle measurements and water ellipsometric porosimetry and the same trends were observed. Additionally, we provide the first evidence for a steric hindrance of the self-hydrophobization process. We show that a partial template removal results in the methylene-to-methyl transformation being observed at a temperature as low as 200 degrees C, significantly lower than previously demonstrated. These results should be taken into account when PMO materials are considered for applications such as low-k dielectrics, membranes, catalyst and chromatographic supports, and drug carriers

Laser anneal of oxycarbosilane low-k film

Submilisecond laser anneal has been experimentally investigated for porogen removal and its ability to improve the mechanical strength in oxycarbosilane ultra low-k films compromised due to the introduction of porosity. We report the occurrence of extensive bond rearrangements inferred from Fourier-transform infra-red (FTIR) spectroscopy, elastic recoil detection (ERD) and spectroscopic ellipsometry (SE) in the energy range of 1.4-8 eV. The laser anneal affects most notably the organic content of the organosilicate matrix leading to depletion and reorganization. Nevertheless, the tested conditions reveal a processing window which allows for 13% improvement of Young’s modulus as compared to the reference film, annealed in a conventional furnace at 400°C for 2 h, while not impacting the relative dielectric constant of 2.25

Carrot Juice Consumption During Chemotherapy Increases Haemoglobin Level on Patients with Cancer of Cervix Stage Ii-b

Introduction: Ca Cervix patients who had a chemotherapy may experience depletion of Hb level. Hb level can increase by giving a natural carrot juice. The nutritional content of carrot juice such as beta karoten, ferrum, calcium, vitamin B, vitamin C and protein can assist bone marrow produce Hb and lymphosite. The objective of this study was to analyze the effect of carrot juice consumption during chemotherapy on Hb level of patients with Ca Cervix stage II-b. Method: This study used a quasy experimental design and the population was the patients who stayed at gynecology room. The sampling technique was used consecutive sampling, with the total sample were 16 respondents. Data were collected by taken the blood sample and analyzed by using Paired t-Test and Independent t-Test. Result: The result showed that carrot juice influent on the change of rate of Hb with significance level (p=0.005). Discussion: It can be concluded that by giving carrot juice to the patients with experiencing chemotherapy, can increase Hb level. Further studies are recommended to analyze the effect of carrot Juice on patient with low Hb level during Chemotherapy for further possibilities

Effect of the C-bridge length on the ultraviolet-resistance of oxycarbosilane low-k films

The ultra-violet (UV) and vacuum ultra-violet (VUV) resistance of bridging alkylene groups in organosilica films has been investigated. Similar to the Si-CH3 (methyl) bonds, the Si-CH2-Si (methylene) bonds are not affected by 5.6 eV irradiation. On the other hand, the concentration of the Si-CH2-CH2-Si (ethylene) groups decreases during such UV exposure. More significant difference in alkylene reduction is observed when the films are exposed to VUV (7.2 eV). The ethylene groups are depleted by more than 75% while only about 40% methylene and methyl groups loss is observed. The different sensitivity of bridging groups to VUV light should be taken into account during the development of curing and plasma etch processes of low-k materials based on periodic mesoporous organosilicas and oxycarbosilanes. The experimental results are qualitatively supported by ab-initio quantum-chemical calculations