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Synthesis of Mono-Ketone Curcumin Analogs from 3-Benzyloxybenzaldehyde and Their Activity Assay as Inhibitor of α-Amylase Muhammad Badrul Hudaa, Endang Astutib* and Tri Joko Raharjoc Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Gadjah Mada, Sekip Utara, Yogyakarta, Indonesia.
The structures of the products were elucidated by FTIR, MS/MS, 1H-NMR, and 13C-NMR.
Preliminary structure-activity relationship analysis of curcumin demonstrated that the lack of curcumin stability under biological conditions is because of the β-diketone moiety and the active methylene group, hence removing β-diketone moiety may improve the stability of curcumin derivatives [8, 9].
The transformation of the β-diketone structure of curcumin as mono-carbonyl curcumin significantly increases its stability.
The structures of mono-ketone curcumin analogs were confirmed by spectral data.

The corrosion of underground structures is a very widespread problem, Structures such as natural gas, crude oil pipelines, and water mains are only some of the many structures reported to have been affected by soil corrosion all around the world [5, 6].
Severe corrosion of buried metal structures has led to explosions, loss of life, and massive environmental clean ups.
In the galvanic system, the metallic structure is made the cathode (negative) by connecting it to galvanic anodes, which are more negative than the metallic structure to be protected.
Potential: the potential of anode must be more negative value than the structure potential. 2.
This behavior is attributed to the presence of Sn as an alloying element leading to electrochemical activity of alloy due to modification in the chemistry of the film leading to the active dissolution of Al [17].

Additionally the wings porosity exists which is a consequence of the soft feather structure.
Fig. 2 Wings birds used in present experiment: a) Northern hawk-owl; b) Barn owl; c) structures on the trailing of Northern hawk-owl wing; d) structures on the trailing edge of Barn owl wing.
The geometry and shape of the structures on the trailing edge of the wings were illustrated.
Journal of Fluids and Structures 5(1) (1991) 33–45
Howe, Acoustics of fluid structure interactions.

The structure was analyzed on Rigaku Smartlab-5 X-ray Diffractometer.
It should be emphasized that both of them normally have the same hexagonal close packed structure.
The methods, based on the Zn/ZnO core–shell structure, are better studied [18,33,41].
Azeez, Structure, synthesis and applications of ZnO nanoparticles: A review, Jordan J.
Alcock, Vapor pressure of the metallic elements, in: CRC Handbook of Chemistry and Physics, 83rd ed., CRC Press, Boca Raton, 2002–2003, pp. 4.134-4.136

Scheme of the structure of Layered Double Hydroxides.
In particular, the intercalation capacity and the two-dimensional structure of LDHs have allowed and will allow the realization of new nano-hybrids.
Once obtained, the intercalates can be manufactured and used in bio-LDH structures for the transport and subsequent controlled release of the bioactive substances [5-7].
Fig. 3) instead presented petal-like structures.
Journal of Physics and Chemistry of Solids 71(2010)685–688.

Crystal structure and phase composition analysis by X-ray diffraction (XRD).
XRD reveals information on the structure, crystallinity and lattice spacing of the material.
The olivine structure of LiMnPO4 was maintained after modification and a solid LiMnPO4/MgO-Au was formed as shown in Fig. 4.
The analysis revealed that olivine LiMnPO4 does still retain its orthorhombic structure.
Grätzel, High-performance, nano-structured LiMnPO4 synthesized via a polyol method.

Micro-chemistry and mechanical behaviour of Ti6Al4V-SiCf composite produced by HIP for aeronautical applications P.
Fig.1 shows the stratified structure of the SiC fibres (SCS-6 type, F = 0.14 mm) used to produce the material.
Section of the composite: internal structure of a SCS-6 fibre embedded in the Ti6Al4V matrix.
TEM confirms the complex structure of the fibre-matrix interface in the as-prepared composite.
Fig. 5b displays the matrix structure near the TiC layer surrounding the fibres.

Scanning electron microscopy (SEM) analysis.SEM can be used to study the microstructure of the material.In order to investigate the influence of ultrasound during extraction on the structure of the materials and to understand the extraction mechanism, the solid remained was collected and dried in air after the extraction of camellia oil for the SEM analysis.
Forum Vol.2 (2007), p. 139. in Chinese [2] Lee P,Yen G C: Journal of Agricultural Food Chemistry.

Nitrogen concentration calculation based on X-ray diffraction analyzing At present, though the X-ray diffraction technology is widely used on the qualitative analysis and quantitative analysis of the surface phase structure for different materials nitrided, but the method of using X-ray diffraction to ascertain the surface nitrogen concentration of plasma nitriding case under different processing conditions is hardly adopted.
Chen: “Low Temperature Plasma Chemistry and Application,” Science Press, 2001, 7 (In Chinese)

Table 1 Raw materials and solvents used Code Mw(g/mol) Lactic:Glycolic acid Manufacturers PLGA(1#) 50,000 80:20 E-sun Bio-engineering High-tech Ltd(Shenzhen) PLGA(2#) 70:30 PLGA(3#) 50:50 Tetracycline hydrochloride(Tet) - - Aladdin Chemistry Co., Ltd DMF - - Sinopharm Chemical Reagent Co., Ltd CHCl3 - - Sinopharm Chemical Reagent Co., Ltd 2.2.
In this experiment, we chose simulation intestinal fluid as our target environment, thus (37±0.5)℃ was the temperate of release medium. 2.4.2 Determination of equilibrium solubility of drug The actual equilibrium solubility of drug was quantified by disolving excess Tet in PBS (pH=6.8) at (37±0.5)℃ and measuring the supernate after super centrifuge treatment (5000 rpm, 2 min) in a UV-vis spectrophotometer at 357 nm by back-calculating from standard work curve. 2.4.3 Determination of drug-loaded A piece of drug-loaded fiber mats was dissolved in 5ml chloroform(to destroy the fiber structure, releasing drugs into the solvent phase), and 10 ml PBS(pH=6.8) was used to extract drug in ultrasonic treatment for 1.5 hours.