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Chemistry Central Journal

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https://www.readbyqxmd.com/read/29468431/synthesis-of-molecular-imprinting-polymers-for-extraction-of-gallic-acid-from-urine
#1
Showkat Ahmad Bhawani, Tham Soon Sen, Mohammad Nasir Mohammad Ibrahim
The molecularly imprinted polymers for gallic acid were synthesized by precipitation polymerization. During the process of synthesis a non-covalent approach was used for the interaction of template and monomer. In the polymerization process, gallic acid was used as a template, acrylic acid as a functional monomer, ethylene glycol dimethacrylate as a cross-linker and 2,2'-azobisisobutyronitrile as an initiator and acetonitrile as a solvent. The synthesized imprinted and non-imprinted polymer particles were characterized by using Fourier-transform infrared spectroscopy and scanning electron microscopy...
February 21, 2018: Chemistry Central Journal
https://www.readbyqxmd.com/read/29468333/synthesis-of-multifunctional-activated-carbon-nanocomposite-comprising-biocompatible-flake-nano-hydroxyapatite-and-natural-turmeric-extract-for-the-removal-of-bacteria-and-lead-ions-from-aqueous-solution
#2
H D A Chathumal Jayaweera, Induni Siriwardane, K M Nalin de Silva, Rohini M de Silva
Clean water, which is free from pathogens and toxic chemicals, is vital to human health. The blue planet is encountering remarkable challenges in meeting the ever-increasing demands of clean water. The intention of this research study was to develop a water filter material that is capable of removing bacterial contaminants and heavy metals from fresh water using cost effective and easily fabricated biocompatible filter material. For this purpose, granular activated carbon (GAC) was coated with both hydroxyapatite (HAP) nanoflakes and turmeric extract (TE) (HAP/TE/GAC) which had been extracted from natural turmeric powder...
February 21, 2018: Chemistry Central Journal
https://www.readbyqxmd.com/read/29455357/phytochemical-constituents-antioxidant-activity-and-antiproliferative-properties-of-black-red-and-brown-rice-bran
#3
Ali Ghasemzadeh, Mohamad Taghi Karbalaii, Hawa Z E Jaafar, Asmah Rahmat
BACKGROUND: In the recent years, the health benefits of the pigmented rice varieties have reported due to the presence of bioactive compounds. In this study, the phytochemical constituents (total phenolic, flavonoid and anthocyanin content) and individual phenolics and flavonoids of the extracts of sixteen genotypes of pigmented rice bran were evaluated using spectrophotometric and ultra-high performance liquid chromatography method. Antioxidative properties of the free and bound fractions were evaluated using nitric oxide and 1,1-diphenyl-2-picrylhydrazyl scavenging assays...
February 17, 2018: Chemistry Central Journal
https://www.readbyqxmd.com/read/29442202/anti-inflammatory-effect-of-oligostilbenoids-from-vitis-heyneana-in-lps-stimulated-raw-264-7-macrophages-via-suppressing-the-nf-%C3%AE%C2%BAb-activation
#4
Do Thi Ha, Phung Thanh Long, Tran Thi Hien, Dao Trong Tuan, Nguyen Thi Thuy An, Nguyen Minh Khoi, Ha Van Oanh, Tran Manh Hung
BACKGROUND: Vitis heyneana is widely distributed in the north of Vietnam, it has been used in Vietnamese traditional medicine as an agent for treatment of arthritis, bronchitis, carbuncles and inflammatory conditions, and menstrual irregularities. However, this plant has not been investigated in phytochemical constituents and biological effects, especially in the anti-inflammatory property. RESULTS: Bioassay-guided fractionation of the EtOAc soluble fraction from the aerial part of Vitis heyneana resulted in the isolation of a series of oligostilbenoids as piceid (1), 2-r-viniferin (2), betulifol A (3), vitisinol C (4), (-)-trans-ε-viniferin (5), α-viniferin (6), shoreaketon (7), amurensin B (8), vitisinol B (9), and cis-vitisin B (10)...
February 13, 2018: Chemistry Central Journal
https://www.readbyqxmd.com/read/29442196/qsar-study-on-the-removal-efficiency-of-organic-pollutants-in-supercritical-water-based-on-degradation-temperature
#5
Ai Jiang, Zhiwen Cheng, Zhemin Shen, Weimin Guo
This paper aims to study temperature-dependent quantitative structure activity relationship (QSAR) models of supercritical water oxidation (SCWO) process which were developed based on Arrhenius equation between oxidation reaction rate and temperature. Through exploring SCWO process, each kinetic rate constant was studied for 21 organic substances, including azo dyes, heterocyclic compounds and ionic compounds. We propose the concept of TR95, which is defined as the temperature at removal ratio of 95%, it is a key indicator to evaluate compounds' complete oxidation...
February 13, 2018: Chemistry Central Journal
https://www.readbyqxmd.com/read/29442180/effect-of-crosslinking-concentration-on-properties-of-3-trimethoxysilyl-propyl-methacrylate-n-vinyl-pyrrolidone-gels
#6
Ameen Hadi Mohammed, Mansor B Ahmad, Nor Azowa Ibrahim, Norhazlin Zainuddin
BACKGROUND: The incorporation of two different monomers, having different properties, in the same polymer molecule leads to the formation of new materials with great scientific and commercial importance. The basic requirements for polymeric materials in some areas of biomedical applications are that they are hydrophilic, having good mechanical and thermal properties, soft, and oxygen-permeable. RESULTS: A series of 3-(trimethoxysilyl) propyl methacrylate/N-vinyl pyrrolidone (TMSPM/NVP) xerogels containing different concentration of ethylene glycol dimethacrylate (EGDMA) as crosslinking agent were prepared by bulk polymerization to high conversion using BPO as initiator...
February 13, 2018: Chemistry Central Journal
https://www.readbyqxmd.com/read/29417377/better-agonist-for-the-opioid-receptors
#7
LETTER
Syed Lal Badshah, Asad Ullah, Salim S Al-Showiman, Yahia Nasser Mabkhot
This commentary highlights the recent work published in journal Nature on the structural based discovery of novel analgesic compounds for opioid receptors with minimal effects. Manglik et al. selectively targeted the Gi based μOR pathway instead of the β-arrestin pathway of the opioids. The computational screening of millions of compounds showed a list of several competent ligands. From these ligands they synthesized the compounds with the best docking score, which were further optimized by adding side residues for better interaction with the μOR...
February 8, 2018: Chemistry Central Journal
https://www.readbyqxmd.com/read/29417254/assessment-and-comparison-of-phytochemical-constituents-and-biological-activities-of-bitter-bean-parkia-speciosa-hassk-collected-from-different-locations-in-malaysia
#8
Ali Ghasemzadeh, Hawa Z E Jaafar, Mohamad Fhaizal Mohamad Bukhori, Mohd Hafizad Rahmat, Asmah Rahmat
BACKGROUND: Parkia speciosa seeds are a common ingredient in Malay cuisine with traditional interest because of its medicinal importance and content of health-promoting phytochemicals. This study evaluated the phytochemical constituents and biological activities (antioxidant and antibacterial activities) of Parkia speciosa Hassk seeds collected from three different regions of Malaysia (Perak, Negeri Sembilan and Johor). Phytochemical constituents (total flavonoid and total phenolic) were measured using the spectrophotometric method, and individual flavonoids and phenolic acids were identified using ultra-high-performance liquid chromatography...
February 7, 2018: Chemistry Central Journal
https://www.readbyqxmd.com/read/29411174/synthesis-characterization-molecular-docking-evaluation-antiplatelet-and-anticoagulant-actions-of-1-2-4-triazole-hydrazone-and-sulphonamide-novel-derivatives
#9
Waseem Khalid, Amir Badshah, Arif-Ullah Khan, Humaira Nadeem, Sagheer Ahmed
In the present study, a series of new hydrazone and sulfonamide derivatives of 1,2,4-triazole were synthesized. Initially three 4-substituted-5-(2-pyridyl)-1,2,4-triazole-3-thiones ZE-1(a-c) were treated with ethyl chloroacetate to get the corresponding thioesters ZE-2(a-c), which were reacted with hydrazine hydrate to the respective hydrazides ZE-3(a-c). The synthesized hydrazides were condensed with different aldehydes and p-toluene sulfonylchloride to furnish the target hydrazone derivatives ZE-4(a-c) and sulfonamide derivatives ZE-5(a-c) respectively...
February 7, 2018: Chemistry Central Journal
https://www.readbyqxmd.com/read/29411153/surface-thiolation-of-silicon-for-antifouling-application
#10
Xiaoning Zhang, Pei Gao, Valerie Hollimon, DaShan Brodus, Arion Johnson, Hongmei Hu
Thiol groups grafted silicon surface was prepared as previously described. 1H,1H,2H,2H-perfluorodecanethiol (PFDT) molecules were then immobilized on such a surface through disulfide bonds formation. To investigate the contribution of PFDT coating to antifouling, the adhesion behaviors of Botryococcus braunii (B. braunii) and Escherichia coli (E. coli) were studied through biofouling assays in the laboratory. The representative microscope images suggest reduced B. braunii and E. coli accumulation densities on PFDT integrated silicon substrate...
February 7, 2018: Chemistry Central Journal
https://www.readbyqxmd.com/read/29411150/correction-to-design-synthesis-conformational-and-molecular-docking-study-of-some-novel-acyl-hydrazone-based-molecular-hybrids-as-antimalarial-and-antimicrobial-agents
#11
Parvin Kumar, Kulbir Kadyan, Meenakshi Duhan, Jayant Sindhu, Vineeta Singh, Baljeet Singh Saharan
After publication of the original article [1], the following error was reported in the Results section of the Abstract: "antifungal activity against one yeast i.e. Aspergillus niger" should read: "antifungal activity against one fungus i.e. Aspergillus niger". The authors would like to confirm all antifungal activity has been screened against fungi not yeast.
February 6, 2018: Chemistry Central Journal
https://www.readbyqxmd.com/read/29404816/experimental-and-theoretical-studies-of-schiff-bases-as-corrosion-inhibitors
#12
Dalia M Jamil, Ahmed K Al-Okbi, Shaimaa B Al-Baghdadi, Ahmed A Al-Amiery, Abdulhadi Kadhim, Tayser Sumer Gaaz, Abdul Amir H Kadhum, Abu Bakar Mohamad
BACKGROUND: Relatively inexpensive, stable Schiff bases, namely 3-((4-hydroxybenzylidene)amino)-2-methylquinazolin-4(3H)-one (BZ3) and 3-((4-(dimethylamino)benzylidene)amino)-2-methylquinazolin-4(3H)-one (BZ4), were employed as highly efficient inhibitors of mild steel corrosion by corrosive acid. FINDINGS: The inhibition efficiencies were estimated based on weight loss method. Moreover, scanning electron microscopy was used to investigate the inhibition mechanism...
February 5, 2018: Chemistry Central Journal
https://www.readbyqxmd.com/read/29404706/notable-mixed-substrate-fermentation-by-native-kodamaea-ohmeri-strains-isolated-from-lagenaria-siceraria-flowers-and-ethanol-production-on-paddy-straw-hydrolysates
#13
Shalley Sharma, Anju Arora, Pankhuri Sharma, Surender Singh, Lata Nain, Debarati Paul
BACKGROUND: Bioethanol obtained by fermenting cellulosic fraction of biomass holds promise for blending in petroleum. Cellulose hydrolysis yields glucose while hemicellulose hydrolysis predominantly yields xylose. Economic feasibility of bioethanol depends on complete utilization of biomass carbohydrates and an efficient co-fermenting organism is a prerequisite. While hexose fermentation capability of Saccharomyces cerevisiae is a boon, however, its inability to ferment pentose is a setback...
February 5, 2018: Chemistry Central Journal
https://www.readbyqxmd.com/read/29372439/antioxidant-activity-of-polyphenolic-compounds-isolated-from-ethyl-acetate-fraction-of-acacia-hydaspica-r-parker
#14
Tayyaba Afsar, Suhail Razak, Maria Shabbir, Muhammad Rashid Khan
BACKGROUND: Acacia hydaspica belongs to family leguminosae possess antioxidant, anti-inflammatory and anticancer activities. During our search for antioxidant compounds from A. hydaspica, we carried out bioassay guided fractionation and obtained antioxidant compounds with free radical scavenging activity. MATERIALS AND METHODS: The polyphenol compounds in the plant extract of A. hydaspica were isolated by combination of different chromatographic techniques involving vacuum liquid chromatography and medium pressure liquid chromatography...
January 25, 2018: Chemistry Central Journal
https://www.readbyqxmd.com/read/29372342/determination-of-flutamide-and-two-major-metabolites-using-hplc-dad-and-hptlc-methods
#15
Nada S Abdelwahab, Heba A H Elshemy, Nehal F Farid
Flutamide is a potential antineoplastic drug classified as an anti-androgen. It is a therapy for men with advanced prostate cancer, administered orally after which it undergoes extensively first pass metabolism in the liver with the production of several metabolites. These metabolites are predominantly excreted in urine. One of the important metabolites in plasma is 4-nitro-3-(trifluoromethyl)phenylamine (Flu-1), while the main metabolite in urine is 2-amino-5-nitro-4-(trifluoromethyl)phenol (Flu-3). In this work the two metabolites, Flu-1 and Flu-3, have been synthesized, and then structural confirmation has been carried out by HNMR analysis...
January 25, 2018: Chemistry Central Journal
https://www.readbyqxmd.com/read/29372338/screening-for-cytotoxic-chemical-constituents-from-justicia-procumbens-by-hplc-dad-esi-ms-and-nmr
#16
Bo Liu, Yanfang Yang, Hongbin Liu, Zhoutao Xie, Qun Li, Meng Deng, Fangping Li, Jingling Peng, Hezhen Wu
BACKGROUND: The Acanthaceae family is an important source of therapeutic drugs and ethno medicines. There are many famous medicinal plants from this family, such as Andrographis paniculata, Baphicacanthus cusia, and Dicliptera chinensis. Justicia procumbens (J. procumbens) is widely distributed in tropical and sub-tropical of the world. It has long been used in traditional Chinese medicine for cancer. The 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide assay showed the ethyl acetate extract of J...
January 25, 2018: Chemistry Central Journal
https://www.readbyqxmd.com/read/29350299/mutagenicity-cytotoxic-and-antioxidant-activities-of-ricinus-communis-different-parts
#17
Mazhar Abbas, Abid Ali, Muhammad Arshad, Asia Atta, Zahed Mehmood, Imtiaz Mahmood Tahir, Munawar Iqbal
Ricinus communis (castor plant) is a potent medicinal plant, which is commonly used in the treatment of various ailments. The present study was conducted to appraise the cytotoxicity and mutagenicity of R. communis along with antioxidant and antimicrobial activities. Cytotoxicity was evaluated by hemolytic and brine shrimp assays, whereas Ames test (TA98 and TA100) was used for mutagenicity evaluation. Plant different parts were extracted in methanol by shaking, sonication and Soxhlet extraction methods. The R...
January 19, 2018: Chemistry Central Journal
https://www.readbyqxmd.com/read/29327318/evaluation-of-water-quality-and-human-risk-assessment-due-to-heavy-metals-in-groundwater-around-muledane-area-of-vhembe-district-limpopo-province-south-africa
#18
Joshua Nosa Edokpayi, Abimbola Motunrayo Enitan, Ntwanano Mutileni, John Ogony Odiyo
Groundwater is considered as good alternative to potable water because of its low turbidity and perceived low contamination. The study assessed the physio-chemical and heavy metals concentrations in eight randomly selected boreholes water at Muledane village in Limpopo Province of South Africa and the results were compared with South African National standard permissible limit. The impacts of heavy metals on human health was further determined by performing quantitative risk assessment through ingestion and dermal adsorption of heavy metals separately for adults and children in order to estimate the magnitude of heavy metals in the borehole samples...
January 12, 2018: Chemistry Central Journal
https://www.readbyqxmd.com/read/29318401/synthesis-anti-microbial-activity-cytotoxicity-of-some-novel-substituted-5-3-1h-benzo-d-imidazol-2-yl-4-hydroxybenzyl-benzofuran-2-yl-phenyl-methanone-analogs
#19
Bhookya Shankar, Pochampally Jalapathi, Balabadra Saikrishna, Shaym Perugu, Vijjulatha Manga
BACKGROUND: There is a dire need for the discovery and development of new antimicrobial agents after several experiments for a better resistance of microorganisms towards antimicrobial agents become a serious health problem for a few years in the past. As benzimidazole possess various types of biological activities, it has been synthesized, in the present study, a new series of (5-(3-(1H-benzo[d]imidazol-2-yl)-4-hydroxybenzyl)benzofuran-2-yl)(phenyl)methanone analogs by using the condensation and screened for its in vitro antimicrobial activity and cytotoxicity...
January 9, 2018: Chemistry Central Journal
https://www.readbyqxmd.com/read/29282557/regioselective-alkali-metal-reduction-of-dibenzocyclooctadiene-lignan-derivatives-demethoxylation-followed-by-dehalogenation
#20
Qing-Yao Wang, Jia-Qi Fang, Lu-Lu Deng, Xiao-Jiang Hao, Shu-Zhen Mu
The regioselective demethoxylation and dehalogenation of dihalogenated dibenzocyclooctadiene lignans derivatives were realized in a one-step reaction with excellent yields in the sodium and t-butanol reaction system.
December 27, 2017: Chemistry Central Journal
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