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Chemistry Central Journal

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https://www.readbyqxmd.com/read/28224018/2-benzyl-benzofurans-from-the-tubers-of-ophiopogon-japonicus
#1
Nguyen Hai Dang, Nguyen Dinh Chung, Ha Manh Tuan, Nguyen Van Thanh, Nguyen Tuan Hiep, Dongho Lee, Nguyen Tien Dat
BACKGROUND: The overproduction of nitric oxide (NO) is known to involve in various inflammatory processes. A methanol extract of the tubers of Ophiopogon japonicus was found to strongly inhibit NO production. The present paper deals with the isolation, structural identification and NO inhibitory effect of five compounds isolated from the MeOH extract of O. japonicus tubers. RESULTS: Three new compounds were elucidated to be (2R)-(4-methoxybenzyl)-5,7-dimethyl-6-hydroxyl-2,3-dihydrobenzofuran (1), 2-(2-hydroxyl-4-methoxy-benzyl)-5-methyl-6-methoxyl-2,3-dihydrobenzofuran (2), and 2-(4-hydroxy-benzyl)-5,6-dihydroxybenzofuran (3)...
2017: Chemistry Central Journal
https://www.readbyqxmd.com/read/28224017/the-effect-of-carbamic-acid-1-2-3-thiadiazole-4-ylcarbonyl-hexyl-ester-on-peronophythora-litchii-infection-quality-and-physiology-of-postharvest-litchi-fruits
#2
Hai Liu, Guoxing Jing, Yueming Jiang, Fuying Luo, Zaifeng Li
BACKGROUND: Litchi (Litchi chinensis Sonn.) is a subtropical fruit with attractive characteristic of white to creamy semitranslucent flesh and red color in pericap, but it was easily subjected to the infection of Peronophythora litchii and lost its market values. Experiments were conducted to understand the effect of [Carbamic acid, (1,2,3-thiadiazole-4-ylcarbonyl)-hexyl ester, CTE] on the growth of P. litchi and quality properties in litchi fruits during postharvest storage. RESULTS: In vitro experiments, CTE with minimum inhibitory concentration (MIC, 5 mg/L) and minimum fungicidal concentration (MFC, 10 mg/L) were against the growth of P...
2017: Chemistry Central Journal
https://www.readbyqxmd.com/read/28224016/characterization-of-major-metabolites-of-polymethoxylated-flavonoids-in-pericarpium-citri-reticulatae-using-liver-microsomes-immobilized-on-magnetic-nanoparticles-coupled-with-uplc-ms-ms
#3
Jun Lei, Ying Xue, Yi-Ming Liu, Xun Liao
The peels of citrus fruits (Pericarpium Citri Reticulatae, PCR) have long been used in traditional Chinese medicines (TCMs). Polymethoxylated flavonoids (PMFs) were found to be the main components present in PCR extracts, but their metabolism remains unclear which restrain the utilization of this TCM. In the present work, rat liver microsomes were immobilized on magnetic nanoparticles (LMMNPs) for in vitro metabolic study on the whole PMFs of PCR. LMMNPs were characterized by transmission electron microscope and Fourier-transform infrared spectrum...
2017: Chemistry Central Journal
https://www.readbyqxmd.com/read/28203273/synthesis-and-biological-evaluation-of-the-new-1-3-dimethylxanthine-derivatives-with-thiazolidine-4-one-scaffold
#4
Sandra Constantin, Florentina Geanina Lupascu, Maria Apotrosoaei, Ioana Mirela Vasincu, Dan Lupascu, Frederic Buron, Sylvain Routier, Lenuta Profire
BACKGROUND: The xanthine structure has proved to be an important scaffold in the process of developing a wide variety of biologically active molecules such as bronchodilator, hypoglycemiant, anticancer and anti-inflammatory agents. It is known that hyperglycemia generates reactive oxygen species which are involved in the progression of diabetes mellitus and its complications. Therefore, the development of new compounds with antioxidant activity could be an important therapeutic strategy against this metabolic syndrome...
2017: Chemistry Central Journal
https://www.readbyqxmd.com/read/28194226/cheminformatics-studies-to-analyze-the-therapeutic-potential-of-phytochemicals-from-rhazya-stricta
#5
Abdullah Y Obaid, Sreedhara Voleti, Roop Singh Bora, Nahid H Hajrah, Abdulkader M Shaikh Omer, Jamal S M Sabir, Kulvinder Singh Saini
Rhazya stricta is a unique medicinal plant source for many indole alkaloids, non-alkaloids, flavonoids, triterpenes and other unknown molecules with tremendous potential for therapeutic applications against many diseases. In the present article, we generated computational data on predictive properties and activity across two key therapeutic areas of cancer and obesity, and corresponding cheminformatics studies were carried out to examine druggable properties of these alkaloids. Computed physiochemical properties of the 78 indole alkaloids from R...
2017: Chemistry Central Journal
https://www.readbyqxmd.com/read/28184241/thermal-degradation-of-aqueous-2-aminoethylethanolamine-in-co2-capture-identification-of-degradation-products-reaction-mechanisms-and-computational-studies
#6
Idris Mohamed Saeed, Vannajan Sanghiran Lee, Shaukat Ali Mazari, B Si Ali, Wan Jeffrey Basirun, Anam Asghar, Lubna Ghalib, Badrul Mohamed Jan
Amine degradation is the main significant problems in amine-based post-combustion CO2 capture, causes foaming, increase in viscosity, corrosion, fouling as well as environmental issues. Therefore it is very important to develop the most efficient solvent with high thermal and chemical stability. This study investigated thermal degradation of aqueous 30% 2-aminoethylethanolamine (AEEA) using 316 stainless steel cylinders in the presence and absence of CO2 for 4 weeks. The degradation products were identified by gas chromatography mass spectrometry (GC/MS) and liquid chromatography-time-of-flight-mass spectrometry (LC-QTOF/MS)...
2017: Chemistry Central Journal
https://www.readbyqxmd.com/read/28123451/green-solvents-and-technologies-for-oil-extraction-from-oilseeds
#7
REVIEW
S P Jeevan Kumar, S Rajendra Prasad, Rintu Banerjee, Dinesh K Agarwal, Kalyani S Kulkarni, K V Ramesh
Oilseeds are crucial for the nutritional security of the global population. The conventional technology used for oil extraction from oilseeds is by solvent extraction. In solvent extraction, n-hexane is used as a solvent for its attributes such as simple recovery, non-polar nature, low latent heat of vaporization (330 kJ/kg) and high selectivity to solvents. However, usage of hexane as a solvent has lead to several repercussions such as air pollution, toxicity and harmfulness that prompted to look for alternative options...
2017: Chemistry Central Journal
https://www.readbyqxmd.com/read/28123450/a-conceptual-dft-study-of-the-molecular-properties-of-glycating-carbonyl-compounds
#8
Juan Frau, Daniel Glossman-Mitnik
Several glycating carbonyl compounds have been studied by resorting to the latest Minnesota family of density functional with the objective of determinating their molecular properties. In particular, the chemical reactivity descriptors that arise from conceptual density functional theory and chemical reactivity theory have been calculated through a [Formula: see text]SCF protocol. The validity of the KID (Koopmans' in DFT) procedure has been checked by comparing the reactivity descriptors obtained from the values of the HOMO and LUMO with those calculated through vertical energy values...
2017: Chemistry Central Journal
https://www.readbyqxmd.com/read/28123449/enhanced-antibacterial-activity-of-tio2-nanoparticle-surface-modified-with-garcinia-zeylanica-extract
#9
U L N H Senarathna, S S N Fernando, T D C P Gunasekara, M M Weerasekera, H G S P Hewageegana, N D H Arachchi, H D Siriwardena, P M Jayaweera
BACKGROUND: The antibacterial activity of 21 nm TiO2 nanoparticles (NPs) and particles modified with Garcinia zeylanica (G. zeylanica) against Methicillin resistant Staphylococcus aureus was investigated in the presence and absence of light. RESULTS: Surface modification of TiO2 NPs with the adsorption of G. zeylanica extract, causes to shift the absorption edge of TiO2 NPs to higher wavelength. TiO2 NPs, G. zeylanica pericarp extract showed significant bactericidal activity which was further enhanced in contact with the TiO2 modified G...
2017: Chemistry Central Journal
https://www.readbyqxmd.com/read/28123448/optimization-of-microwave-assisted-extraction-of-zerumbone-from-zingiber-zerumbet-l-rhizome-and-evaluation-of-antiproliferative-activity-of-optimized-extracts
#10
Ali Ghasemzadeh, Hawa Z E Jaafar, Asmah Rahmat, Mallappa Kumara Swamy
BACKGROUND: The extraction of bioactive compounds from herbal materials requires optimization in order to recover the highest active dose. Response surface methodology was used to optimize variables affecting the microwave extraction of zerumbone from Zingiber zerumbet using the Box-Behnken design. The influence of variables, such as ethanol concentration (X1), microwave power (X2), irradiation time (X3), and liquid-to-solid ratio (X4), on the extraction of zerumbone was modeled using a second-order regression equation...
2017: Chemistry Central Journal
https://www.readbyqxmd.com/read/28119762/synthesis-spectroscopic-dielectric-molecular-docking-and-dft-studies-of-3e-3-4-methylbenzylidene-3-4-dihydro-2h-chromen-2-one-an-anticancer-agent
#11
T Beena, L Sudha, A Nataraj, V Balachandran, D Kannan, M N Ponnuswamy
BACKGROUND: Coumarin (2H-chromen-2-one) and its derivatives have a wide range of biological and pharmaceutical activities. They possess antitumor, anti-HIV, anticoagulant, antimicrobial, antioxidant, and anti-inflammatory activities. Synthesis and isolation of coumarins from different species have attracted the attention of medicinal chemists. Herein, we report the synthesis, molecular structure, dielectric, anticancer activity and docking studies with the potential target protein tankyrase...
2017: Chemistry Central Journal
https://www.readbyqxmd.com/read/28101131/using-flow-technologies-to-direct-the-synthesis-and-assembly-of-materials-in-solution
#12
REVIEW
K Robertson
In the pursuit of materials with structure-related function, directing the assembly of materials is paramount. The resultant structure can be controlled by ordering of reactants, spatial confinement and control over the reaction/crystallisation times and stoichiometries. These conditions can be administered through the use of flow technologies as evidenced by the growing widespread application of microfluidics for the production of nanomaterials; the function of which is often dictated or circumscribed by size...
2017: Chemistry Central Journal
https://www.readbyqxmd.com/read/28101130/silica-titania-xerogel-doped-with-mo-p-heteropoly-compounds-for-solid-phase-spectrophotometric-determination-of-ascorbic-acid-in-fruit-juices-pharmaceuticals-and-synthetic-urine
#13
Maria A Morosanova, Elena I Morosanova
BACKGROUND: Ascorbic acid is one of the most important vitamins to monitor in dietary sources (juices and vitamins) and biological liquids. RESULTS: Silica and silica-titania xerogels doped with Mo,P-heteropoly compounds (HPC) have been synthesized varying titanium(IV) and HPC content in sol. Their surface area and porosity have been studied with nitrogen adsorption and scanning electron microscopy, their elemental composition has been studied with energy-dispersive X-ray analysis...
2017: Chemistry Central Journal
https://www.readbyqxmd.com/read/28101129/a-traditional-poly-herbal-medicine-le-pana-guliya-induces-apoptosis-in-hepg2-and-hela-cells-but-not-in-cc1-cells-an-in-vitro-assessment
#14
Nekadage Don Amal Wageesha, Preethi Soysa, Keerthi Atthanayake, Muhammad Iqbal Choudhary, Mahinda Ekanayake
"Le Pana Guliya" (LPG) is a polyherbal formulation which is used to treat different types of cancers in traditional medicine. In this study we describe in vitro efficacy and mechanism of action of LPG on two cancer cell lines (HepG2 and HeLa) compared with a normal cell line CC1. The MTT, LDH assays and protein synthesis were used to study antiproliferative activity of LPG while NO synthesis and GSH content were assayed to determine the oxidative stress exerted by LPG. Rhodamine 123 staining, caspase 3 activity, DNA fragmentation and microscopic examination of cells stained with ethidium bromide/acridine orange were used to identify the apoptosis mechanisms associated with LPG...
2017: Chemistry Central Journal
https://www.readbyqxmd.com/read/28101128/simultaneous-determination-of-newly-developed-antiviral-agents-in-pharmaceutical-formulations-by-hplc-dad
#15
Nourah Zoman Al-Zoman, Hadir Mohamed Maher, Amal Al-Subaie
BACKGROUND: Ombitasvir/paritaprevir/ritonavir/dasabuvir (Viekira Pak(®)) are the newest medicines approved for use in the treatment of hepatitis C virus (HCV) and are available in tablet form as an oral combination. Specifically, these agents are indicated in the treatment of HCV in patients with genotype 1 infection. Due to the therapeutic importance and increased use of Viekira Pak, proper methods for its determination in bulk and pharmaceutical formulations must be developed. RESULTS: The present study describes the development and validation of a simple, rapid, selective and economical reverse phase high performance liquid chromatography-diode array detection (HPLC-DAD) method for the simultaneous determination of paritaprevir (PAR), ombitasvir (OMB), dasabuvir(DAS) and ritonavir (RIT) in bulk and pharmaceutical preparations...
2017: Chemistry Central Journal
https://www.readbyqxmd.com/read/28028386/in-vitro-drug-release-characteristic-and-cytotoxic-activity-of-silibinin-loaded-single-walled-carbon-nanotubes-functionalized-with-biocompatible-polymers
#16
Julia Meihua Tan, Govindarajan Karthivashan, Shafinaz Abd Gani, Sharida Fakurazi, Mohd Zobir Hussein
In this paper, we demonstrate the preparation of silibinin-loaded carbon nanotubes (SWSB) with surface coating agents via non-covalent approach as an effective drug delivery system. The resulting surface-coated SWSB nanocomposites are extensively characterized by Fourier transform infrared (FTIR) and Raman spectroscopies, ultraviolet-visible (UV-Vis) spectrometry and field emission scanning electron microscopy (FESEM). The FTIR and Raman studies show that an additional layer is formed by these coating agents in the prepared nanocomposites during the coating treatment and these results are confirmed by FESEM...
2016: Chemistry Central Journal
https://www.readbyqxmd.com/read/28028385/hplc-estimation-of-iothalamate-to-measure-glomerular-filtration-rate-in-humans
#17
Iltaf Shah, James Barker, Declan P Naughton, Stephen J Barton, Syed Salman Ashraf
Glomerular filtration rate (GFR) is usually determined by estimation of iothalamate (IOT) clearance. We have developed and validated an accurate and robust method for the analysis of IOT in human plasma and urine. The mobile phase consisted of methanol and 50 mM sodium phosphate (10:90; v/v). Flow rate was 1.2 mL/min on a C18 reverse phase column, Synergi-hydro (250 × 4.6 mm) 4 µm 80 Å, with an ultraviolet detector set to 254 nm. Acetonitrile was used for the deproteination and extraction of IOT from human plasma and urine...
2016: Chemistry Central Journal
https://www.readbyqxmd.com/read/27994641/colon-targeted-drug-delivery-of-branch-chained-disulphide-cross-linked-polymers-design-synthesis-and-characterisation-studies
#18
YongKhee Lau, Vuanghao Lim
Drug delivery directly to the colon is a very useful approach for treating localised colonic diseases such as inflammatory bowel disease, ulcerative colitis, and Crohn's disease. The use of disulphide cross-linked polymers in colon targeted drug delivery systems has received much attention because these polymers are redox sensitive, and the disulphide bonds are only cleaved by the low redox potential environment in the colon. The goal of this study was to synthesise tricarballylic acid-based trithiol monomers for polymerisation into branch-chained disulphide polymers...
2016: Chemistry Central Journal
https://www.readbyqxmd.com/read/27994640/analysis-of-tilianin-and-acacetin-in-agastache-rugosa-by-high-performance-liquid-chromatography-with-ionic-liquids-ultrasound-based-extraction
#19
Jinfeng Wei, Pengran Cao, Jinmei Wang, Wenyi Kang
Ionic liquid 1-butyl-3-methylimidazolium bromide-methanol-based ultrasonic-assisted extraction (ILUAE) was used to extract tilianin and acacetin from the aerial parts of Agastache rugose (A. rugose), and simultaneously determined by reversed phase high performance liquid chromatographic (RP-HPLC) method with ultraviolet detection (RP-HPLC-UV). An InertSustain RP-C18 column was used with the mobile phase consisting of methanol and 0.2% acetic acid as gradient elution at the detection wavelength of 332 nm. The flow rate was 0...
2016: Chemistry Central Journal
https://www.readbyqxmd.com/read/27994639/interpreting-comprehensive-two-dimensional-gas-chromatography-using-peak-topography-maps-with-application-to-petroleum-forensics
#20
Hamidreza Ghasemi Damavandi, Ananya Sen Gupta, Robert K Nelson, Christopher M Reddy
BACKGROUND: Comprehensive two-dimensional gas chromatography [Formula: see text] provides high-resolution separations across hundreds of compounds in a complex mixture, thus unlocking unprecedented information for intricate quantitative interpretation. We exploit this compound diversity across the [Formula: see text] topography to provide quantitative compound-cognizant interpretation beyond target compound analysis with petroleum forensics as a practical application. We focus on the [Formula: see text] topography of biomarker hydrocarbons, hopanes and steranes, as they are generally recalcitrant to weathering...
2016: Chemistry Central Journal
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