The determination of redox potential (E°) was performed by computational study with variation of correlation-function B3LYP, CAM-B3LYP and ωb97-XD for pipiridine, azaadamantane and azaphenalene of nitroxide radi...
The determination of redox potential (E°) was performed by computational study with variation of correlation-function B3LYP, CAM-B3LYP and ωb97-XD for pipiridine, azaadamantane and azaphenalene of nitroxide radical compounds with DFT method. The basis set of 6-13G(d) was used for geometry optimization and frequency calculation. The results showed that the calculation of redox potential with CAM-B3LYP method has the smallest error that is 1.191%. 4-hydroxy TEMPO compound with E° of 0.754 V (vs NHE) is promising to be used as a redox couple on DSSC’s application due to Voc, ΔEregeneration and RCT value consideration.
The effect of the addition electron donating moiety –OCH3, -NHCH3, -OC5H11 and –NH(C5H11) to the electronic properties of carbazole dye, CT2 have been studied using DFT and TDDFT method at CAM-B3LYP level theory and...
The effect of the addition electron donating moiety –OCH3, -NHCH3, -OC5H11 and –NH(C5H11) to the electronic properties of carbazole dye, CT2 have been studied using DFT and TDDFT method at CAM-B3LYP level theory and 6-31G* basis set. The optimized structure were obtained from DFT calculation, whilst electronic properties were obtained using single point TDDFT calculation. The calculated electronic properties were HOMO-LUMO energy level, UV-Vis absorption spectrum, charge transfer quantity and chare transfer distance at ground state and excitation state. The result reveal that the addition of long alkyl electron donating moiety –NH(C5H11) or CT_NC5, give the best result. Contribution HOMO-to-LUMO transition in CT_NC5 molecule of 77%, the quantify charge transfer (qCT) of 1,004 and LUMO energy (ELUMO = of-1,810 eV). Overall, CT_NC5 gave the best result and promising to be applied as a sensitizer in Dye Sensitized Solar Cell (DSSC).
IRS (insulin receptor substrate) is responsible for signal transduction of Insulin-like growth factor-1 (IGF-1) for cell differentiation, proliferation, and anti-apoptosis. Centella asiatica (CA) contains triterpenes ...
IRS (insulin receptor substrate) is responsible for signal transduction of Insulin-like growth factor-1 (IGF-1) for cell differentiation, proliferation, and anti-apoptosis. Centella asiatica (CA) contains triterpenes as antioxidant and anti-inflammatory, macro and micronutrients. This study observed the effect of CA extract on the expression of IGF-1, IRS, and the linear growth of rotenone-induced zebrafish larvae. The zebrafish embryos were divided into five groups: control, Rotenone 12 ppb, Rotenone, and CA extract concentration 2.5, 5, and 10 μg/ml, respectively exposed from 2-hours post fertilization (hpf) until 3-days post-fertilization (dpf). The expression of IGF-1 and IRS were conducted at 9 dpf by immune-histochemistry whole-mount. The body length was measured at 3, 6, and 9 dpf using Image Raster software. The data were analyzed using one-way ANOVA. The results showed that the administration of CA extract could increase the expression of IGF-1 and IRS in rotenone-induced zebrafish larvae. The measurement of body length showed that rotenone reduced the body length of larvae after 6 dpf, and 5 μg/mL of CA extract significantly increased the body length at 6 and 9 dpf. It can be concluded that CA extract increased the body length of zebrafish larvae through the increasing of IGF-1 and IRS signaling.
Forest fire, classified as a natural hazard or human-induced hazard, has negative impacts on humans. These negative impacts are including economic loss, health problems, transportation disruption and land degradation ...
Forest fire, classified as a natural hazard or human-induced hazard, has negative impacts on humans. These negative impacts are including economic loss, health problems, transportation disruption and land degradation or even biodiversity loss. During 2015, forest fire had occurred at the Merang-Kepahyang peat forest that has a total area of about 69.837,00 ha. In order to set a rehabilitation plan for recovering the impact of forest fire, information on the total burnscar area and severity level is required. In this study, the total burnscar area and severity level is evaluated using a calculation on the Normalized Burning Ratio (NBR) Index. The calculation is based on the Near Infra Red (NIR) and Short Wave Infra Red (SWIR) of the satellite imageries from LANDSAT. The images of pre-and post-fire are used to evaluate the severity level, which is defined as a difference in NBR Index of pre- and post-fire. It is found that about 42.906,00 ha of the total area of Merang-Kepahyang peat area have been fired in 2015. These burned area are classified into four categories, i.e., unburned, low, extreme and moderate extreme. By overlying the spatial map of burning level with other thematic maps, it is expected that strategy for rehabilitation plan can be well developed.
Osteogenic differentiation from Mesenchymal Stem Cell (MSC) to osteoblast has a clinical significance which is very important for treating bone injuries, in the form of femoral fractures with the most cases in Indones...
Osteogenic differentiation from Mesenchymal Stem Cell (MSC) to osteoblast has a clinical significance which is very important for treating bone injuries, in the form of femoral fractures with the most cases in Indonesia. Various studies have been conducted to find the best scaffold that can improve osteogenic differentiation, one of which is the development of a hybrid scaffold made from natural biomaterials in the form of the extracellular matrix, and from synthetic biomaterials. The discovery of the best scaffold is not only focused on the source of the scaffold but also requires optimization of the method in making the scaffold. Therefore, the aim of this study is to find out the optimum method for making hybrid scaffolds that support osteogenic differentiation from MSC. Materials and methods: human Fibroblast-derived Matrix (hFDM) as a hybrid scaffold material collected from decellularized fibroblasts cultures from post-cleft-surgery reconstruction palatal skin. Fibroblast cell cultures were divided into two groups of cultures, cultures without Platelet Rich Plasma (PRP), and cultures with the addition of PRP. For decellularization, we performed optimization at the preparation stage of the decellularization solution, and the time of culture for decellularization. In the preparation of the decellularization solution, we divided it into two groups, NH4OH as material from the decellularization solution was diluted with PBS before mixing with 0.25% Triton X-100, and NH4OH was diluted directly in 0.25% Triton X-100. In optimizing the culture time for decellularization, we divided it into three groups, decellularization on the day when cell growth reached 100% confluent, decellularization on the 3rd day after 100% confluent (H + 3) cells, and decellularization on the 4th day after 100% confluent (H + 4) cells. Next, the hFDM matrix is collected and added Polyvinyl Alcohol (PVA) solutions to form a hybrid PVA / hFDM scaffold in the form of a hydrogel. Observations on h
作者：
McCarthy, AliceMain Text
“In June 2003
the scientific and medical communities at MIT Harvard University and its affiliated hospitals and the Whitehead Institute banded together as collaborating partners to form the Eli and Edythe L. Broad Institute based in Cambridge MA. The Broad Institute established with initial funding from a $100 million philanthropic donation from the Los Angeles-based Broad family was primarily viewed as a marriage between the Whitehead Institute's Center for Genome Research (WICGR) and the Harvard Institute of Chemistry and Cell Biology (ICCB). Eli Broad founder and chairman of AIG SunAmerica Inc. explained “the purpose of the Broad Institute is to create a new type of research institute to build on the accomplishments of the human genome project and to move to clinical applications to both prevent and cure diseases.”
Every Thursday morning we meet with perhaps 20 faculty members and 100 other researchers to discuss what we're all doing and should be doing next. -David Altschuler
This paragraph was written five years ago when the Broad Institute was in its very earliest days as a life science research community (McCarthy 2005). Since that time “the Broad” as it's known has kept true to Eli Broad's vision having attracted a talented group of researchers faculty trainees and professional staff. This 1600 person research community known internally as “Broadies” includes faculty staff and students from throughout the MIT and Harvard biomedical research communities and beyond with collaborations spanning over a hundred private and public institutions in more than 40 countries worldwide.
“What is special about the Broad is that we have people from Harvard MIT and the Harvard hospitals come together and work on problems of shared interest that could not be solved in their own individuals labs” explains David Altshuler M.D. Ph.D. Deputy Director and one of the Broad's six core faculty members. “These problems require expertise beyond any one principal investigator and in
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