2,859 publications from this institution
Here, we report the synthesis of nitrogen-doped hollow carbon nanospheres (N-HCSs) via a two-step Stöber method. The resultant N-HCSs possess a uniform size of ∼220 nm, a high nitrogen loading content of 14.8 wt% and a high surface area of 767 m(2) g(-1), as well as exhibit a considerable performance for CO2 capture with a capacity of 2.67 mmol g(-1) and a high selectivity in a mixture gas (N2 or O2).
There is no doubt that, epoxy resin is one of the most important materials that has been widely used in coating technology. The present work is aimed to fabricate a new series of epoxy resin nanocomposites in the form of G/CNTs/EPY1-4 using simple dissolution method and ultrasonic assistance. The expected nanocomposites have been fabricated using 10% loading of different mixed ratios from G/CNTs. Four different G/CNTs mixed ratios were used 20/80%, 40/60%, 60/40%, and 80/20%. The structure of the G/CNT/EPY1-4 nanocomposites has been investigated and confirmed by normal characterization techniques including: X-ray diffraction (XRD), Fourier transforms infrared spectroscopy (FT-IR), Thermogravimetric analysis (TGA), Differential Thermal gravimetry (DTG) and field emission scanning electron microscopy (FE-SEM). T25 and T50 values for G/CNT/EPY1-4 nanocomposites were slightly higher than elegant epoxy. R500 values for the fabricated materials were in the range of 8.98 – 10.04 %. Furthermore, the role of mixed G/CNTs on the coating properties of epoxy resin was determined using electrochemical impedance and technique. The coating resistance of epoxy composites in the form of G/CNT/EPY1-4 was larger than that observed for elegant epoxy coating. G/CNT/EPY3 and G/CNT/EPY1 showed highest and the lowest coating impedance values respectively. In addition to that, the water sorption technique has been used as a complementary method for such coating behaviour. The water uptake was efficiently decreased in all the formulations compared to the epoxy due to the presence of G/CNTs reinforcing agents.
Abstract The clouding behavior of amphiphilic drug clomipramine hydrochloride (CLP) in presence of different additives like bile salts, hydrotropes (anionic, cationic and nonionic), fatty acids, sugars and cyclodextrin has been investigated. These additives are commonly used as drug delivery systems. The additives like anionic hydrotropes, bile salts and fatty acid salts increase the cloud point ( CP ) of CLP, when added in low concentrations, whereas at high concentration, decrease it. Cationic and nonionic hydrotropes increase the CP of CLP at all concentrations. All sugars decreased the CP because of their water structure making property. β-cyclodextrin behaves like simple sugar and decreases the CP of the drug solutions. The thermodynamic parameters are also evaluated: where Δ G c° is found to be negative and Δ H c° and T Δ S c° values are negative as well as positive depending upon type and nature of additive.
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.
In this approach, Hepatocellular carcinoma (HCC) is originated from hepatocytes cell, which can spread several parts in the body. It increases the death rate of cancer patients and more common in men rather than female. Patients having large tumor are growing through expensive treatment such as chemotherapy, radiotherapy and surgery. Nano medicine such as nano-dimensional particles as well as quantum dots might be an alternative treatment with greater efficiency in cancer biology field. Modification of surface and chemical properties of cadmium groups quantum dots can easily penetrate into the cancer cell without harming normal tissues. Here, Cadmium-Selenium Quantum Dot nanomaterials (CdSe QDs) have been prepared in solution phase with 0.1 M concentration, which was potentially applied for the destroying of HepG2 cancer cell with 24 hour and 36 hour of incubation. Due to their size, surface properties, lower cost, QDs can easily attached to the cell and able to damage the cells more rapidly <i>in vitro</i> process. For cell death, gene expression and morphological changing analysis were completed MTT, Flow Cytometry, qRT-PCR assay. Finally, the cell deaths were observed by cell shrinkage, rupture of membrane and expression of apoptotic gene (Bcl2, Beta catenin, Bax) were positive comparing untreated HepG2 cell line.
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.
We report a 72 years old hypertensive female, treated with enalapril 10 mg/day and hydrochlorothiazide 25 mg/day during three years. She presented a depressive disorder and cytalopram was prescribed in a dose of 10 mg/day. Two weeks before admission, a serum electrolyte analysis disclosed normal results and the cytalopram dose was increased to 20 mg/day. The patient was admitted with a hyponatremic encephalopathy with a plasma sodium of 100 mEq/L and a plasma potassium of 2.0 mEq/L. Cytalopram, enalapril and hydrochlorothiazide were discontinued, hypertonic NaCl and KCl were administered. The patient had a favorable evolution with a remarkable improvement of her symptoms.
