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https://www.readbyqxmd.com/read/29206038/introducing-the-bipolar-solvent-media-using-aqueous-mixtures-of-amino-acid-anion-based-ionic-liquids
#1
Vijay Beniwal, Anil Kumar
To carry out a chemical reaction between the reactants with largely different polarities it becomes important to have a reaction medium which possesses both the polar and non-polar solvation environments. In an attempt to explore the reaction media with such unique polarity properties, the present study provides a thorough understanding of the bipolar solvent media using the aqueous mixtures of amino-acid anion based ionic liquids. Highly polar behaviour of the binary mixtures used in the study has been ascribed to the pure ionic liquid state...
December 5, 2017: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/29200724/bioassay-guided-isolation-of-neuroprotective-fatty-acids-from-nigella-sativa-against-1-methyl-4-phenylpyridinium-induced-neurotoxicity
#2
Leila Hosseinzadeh, Hoda Monaghash, Farahnaz Ahmadi, Nastaran Ghiasvand, Yalda Shokoohinia
Objective: Parkinson's disease, a slowly progressive neurological disease, is associated with degeneration of the basal ganglia of the brain and a deficiency of the neurotransmitter dopamine. The main aspects of researches are the protection of normal neurons against degeneration. Fatty acids (FAs), the key structural elements of dietary lipids, are carboxylic straight chains and notable parameters in nutritional and industrial usefulness of a plant. Materials and Methods: Black cumin, a popular anti-inflammatory and antioxidant food seasoning, contains nonpolar constituents such as FAs which were extracted using hexane...
October 2017: Pharmacognosy Magazine
https://www.readbyqxmd.com/read/29188736/n-octyl-n-arginine-chitosan-micelles-for-gambogic-acid-intravenous-delivery-characterization-cell-uptake-pharmacokinetics-and-biodistribution
#3
Fan Yu, Fuguang Jiang, Xinhui Tang, Bochu Wang
OBJECTIVE: The deeper research of N-Octyl-N-Arginine chitosan (OACS) as intravenous delivery was characterized, cell uptake study, pharmacokinetics and biodistribution of OACS micelles (GA-OACS) were investigated. SIGNIFICANCE: Gambogic acid (GA) can inhibit the growth of various cancer cells. However, the short elimination half-life time and treatment without targeting limits its application. OACS was synthesized as delivery carrier for GA by us, but the deeper characteration of OACS, such as molecular modeling, pharmacokinetics and biodistribution et al...
November 30, 2017: Drug Development and Industrial Pharmacy
https://www.readbyqxmd.com/read/29183161/macrophage-repolarization-using-cd44-targeting-hyaluronic-acid-polylactide-nanoparticles-containing-curcumin
#4
Raana Farajzadeh, Nosratollah Zarghami, Hamed Serati-Nouri, Zahra Momeni-Javid, Taher Farajzadeh, Sepideh Jalilzadeh-Tabrizi, Shima Sadeghi-Soureh, Neda Naseri, Younes Pilehvar-Soltanahmadi
The aim of this study was to evaluate the efficiency of using a natural substance, curcumin, encapsulated in CD44-targeting hyaluronate-polylactide (HA-PLA) nanoparticles (NPs) for the modulation of macrophage polarity from the pro-inflammatory M1 to anti-inflammatory M2 phenotype. For this purpose, the characterization of the NPs was monitored using 1HNMR, FTIR, DLS and FE-SEM. The effects of curcumin-encapsulated HA-PLA NPs on the viability of LPS/IFN-γ stimulated peritoneal macrophages were determined using MTT assay...
November 28, 2017: Artificial Cells, Nanomedicine, and Biotechnology
https://www.readbyqxmd.com/read/29180049/self-assembled-supramolecular-hydrogels-formed-by-biodegradable-pla-cs-diblock-copolymers-and-%C3%AE-cyclodextrin-for-controlled-dual-drug-delivery
#5
Yong Hu, XiaoYong Wu, Xu JinRui
The supramolecular hydrogel based on inclusion complexation between PLA/CS diblock copolymer and β-CD has been demonstrated. The PLA/CS diblock copolymer confirmed by FIIR and 1HNMR were synthesized by in situ polymerization. The supramolecular hydrogel formed due to the complexation of PLA/CS with β-cyclodextrin was demonstrated by XRD and FIIR analysis. These results indicate that the carbonyl groups of PLA can form hydrogen bonds with the hydroxyl groups of β-CD and CS in the complexes. The supramolecular hydrogel presented a porous network structure observed by positive fluorescence microscopy (PFM) was found to be thixotropic and reversibl...
November 24, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29176781/1hnmr-based-metabolomic-profiling-method-to-develop-plasma-biomarkers-for-sensitivity-to-chronic-heat-stress-in-growing-pigs
#6
Samir Dou, Nathalie Villa-Vialaneix, Laurence Liaubet, Yvon Billon, Mario Giorgi, Hélène Gilbert, Jean-Luc Gourdine, Juliette Riquet, David Renaudeau
The negative impact of heat stress (HS) on the production performances in pig faming is of particular concern. Novel diagnostic methods are needed to predict the robustness of pigs to HS. Our study aimed to assess the reliability of blood metabolome to predict the sensitivity to chronic HS of 10 F1 (Large White × Creole) sire families (SF) reared in temperate (TEMP) and in tropical (TROP) regions (n = 56±5 offsprings/region/SF). Live body weight (BW) and rectal temperature (RT) were recorded at 23 weeks of age...
2017: PloS One
https://www.readbyqxmd.com/read/28827587/a-prospective-analysis-of-mucosal-microbiome-metabonome-interactions-in-colorectal-cancer-using-a-combined-mas-1hnmr-and-metataxonomic-strategy
#7
James Kinross, Reza Mirnezami, James Alexander, Richard Brown, Alasdair Scott, Dieter Galea, Kirill Veselkov, Rob Goldin, Ara Darzi, Jeremy Nicholson, Julian R Marchesi
Colon cancer induces a state of mucosal dysbiosis with associated niche specific changes in the gut microbiota. However, the key metabolic functions of these bacteria remain unclear. We performed a prospective observational study in patients undergoing elective surgery for colon cancer without mechanical bowel preparation (n = 18). Using 16 S rRNA gene sequencing we demonstrated that microbiota ecology appears to be cancer stage-specific and strongly associated with histological features of poor prognosis...
August 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28718285/strong-blue-emissive-supramolecular-self-assembly-system-based-on-naphthalimide-derivatives-and-its-ability-of-detection-and-removal-of-2-4-6-trinitrophenol
#8
Xinhua Cao, Na Zhao, Haiting Lv, Qianqian Ding, Aiping Gao, Qiangshan Jing, Tao Yi
Two simple and novel gelators (G-P with pyridine and G-B with benzene) with different C-4 substitution groups on naphthalimide derivatives have been designed and characterized. Two gelators could form organogels in some solvents or mixed solvents. The self-assembly processes of G-P in a mixed solvent of acetonitrile/H2O (1/1, v/v) and G-B in acetonitrile were studied by means of electron microscopy and spectroscopy. The organogel of G-P in the mixed solvent of acetonitrile/H2O (1/1, v/v) formed an intertwined fiber network, and its emission spectrum had an obvious blue shift compared with that of solution...
July 27, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28623862/stimuli-responsive-metal-organic-framework-mof-with-chemo-switchable-properties-for-colorimetric-detection-of-chcl3
#9
Sayed Ali Akbar Razavi, Mohammad Yaser Masoomi, Ali Morsali
The ligands 3,6-di(pyridin-4-yl)-1,4-dihydro-1,2,4,5-tetrazine (H2 DPT), as a pillar spacer, and 4,4'-oxybis(benzoic acid) (H2 OBA), as a dicarboxylate linker, have been used to develop a dihydrotetrazine-functionalized pillared metal-organic framework (MOF), [Zn(OBA)(H2 DPT)0.5 ]⋅DMF (TMU-34), as a functionally convertible stimuli-responsive MOF-based sensor. Sonochemically synthesized TMU-34 powder has been employed in the sensing of volatile organic compounds (VOCs). The results show that TMU-34 can act as a solid-state, naked-eye visual chemosensor for the detection of chloroform in the liquid and gas phases...
June 17, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28571542/folic-acid-targeted-polymeric-micelles-based-on-tocopherol-succinate-pulluan-as-an-effective-carrier-for-epirubicin-preparation-characterization-and-in-vitro-cytotoxicity-assessment
#10
Farshid Hassanzadeh, Mozhdeh Mehdifar, Jaleh Varshosaz, Ghadam Ali Khodarahmi, Mahboubeh Rostami
BACKGROUND: Chemotherapy still encounters a serious drawback, the lack of selectivity of anticancer drugs toward neoplastic cells, thus, the normal cells are affected by the cytotoxic action of the drugs. This causes a narrow therapeutic index in most anticancer drugs. OBJECTIVE: We describe here the preparation of pullulan-tocopherol succinate-folic acid (Pu-TS-FA) micelles for the first time to targeted delivery of epirubicin (EPI) to Hela and MCF-7 cell lines...
June 1, 2017: Current Drug Delivery
https://www.readbyqxmd.com/read/28542395/carvacrol-derivatives-as-mushroom-tyrosinase-inhibitors-synthesis-kinetics-mechanism-and-molecular-docking-studies
#11
Zaman Ashraf, Muhammad Rafiq, Humaira Nadeem, Mubashir Hassan, Samina Afzal, Muhammad Waseem, Khurram Afzal, Jalifah Latip
The present work describesthe development of highly potent mushroom tyrosinase inhibitor better than the standard kojic acid. Carvacrol derivatives 4a-f and 6a-d having substituted benzoic acid and cinnamic acidresidues were synthesized with the aim to possess potent tyrosinase inhibitory activity.The structures of the synthesized compounds were ascertained by their spectroscopic data (FTIR, 1HNMR, 13CNMR and Mass Spectroscopy).Mushroom tyrosinase inhibitory activity of synthesized compounds was determined and it was found that one of the derivative 6c possess higher activity (IC50 0...
2017: PloS One
https://www.readbyqxmd.com/read/28479737/flavonoids-from-whole-plant-of-euphorbia-hirta-and-their-evaluation-against-experimentally-induced-gastroesophageal-reflux-disease-in-rats
#12
Shyam Sundar Gupta, Lubna Azmi, P K Mohapatra, Ch V Rao
BACKGROUND: Euphorbia hirta possesses antibacterial, anti-inflammatory, galactogenic, antidiarrheal, antioxidant, hypoglycemic, antiasthmatic, antiamebic, antifungal, and antimalarial activities. OBJECTIVE: The overall objective of the current study was the investigation of the whole plant extract of E. hirta and flavonoids from E. hirta on gastroesophageal reflux disease (GERD) in rats. MATERIALS AND METHODS: The whole plant extract of E...
January 2017: Pharmacognosy Magazine
https://www.readbyqxmd.com/read/28420233/novel-hydrogen-bonding-cross-linking-aggregation-induced-emission-water-as-a-fluorescent-ribbon-detected-in-a-wide-range
#13
Ani Wang, Ruiqing Fan, Yuwei Dong, Yang Song, Yuze Zhou, Jianzong Zheng, Xi Du, Kai Xing, Yulin Yang
The development of efficient sensors for detection of the water content in a wide detection range is highly desirable for balance in many industrial processes and products. Presented herein are six novel different substituted Schiff base Zn(II) complexes, which exhibit the remarkable capability to detect traces of water in a wide linear range (most can reach 0-94%, v/v), low detection limit of 0.2% (v/v), and rapid response time of 8 s in various organic solvents by virtue of an unusual water-activated hydrogen-bonding cross-linking AIE (WHCAIE) mechanism...
April 26, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28417902/a-nir-fluorescent-probe-for-the-rapid-detection-of-hg-2-in-living-cells-and-in-vivo-mice-imaging
#14
Jiaoliang Wang, Liping Long, Li Xia, Fang Fang
A near-infrared fluorescent probe NIR-Hg, for the detection of Hg(2+) ion, has been synthesized directly by condensing Changsha dye with 4-Phenyl-3-thiosemicarbazide and the structure has fully characterized by (1)HNMR, (13)CNMR, and ESI-MS. The probe has been designed on the basis of the reaction that Hg(2+) ion promotes thiosemicarbazide to oxazole in aqueous media and had been induced to produce turn-on fluorescence via an irreversible spirolactam ring-opening process. The probe NIR-Hg has exhibited fast response (1 min), high sensitivity with 44-fold fluorescence intensity enhancement under six equivalent amounts of Hg(2+) added, high selectivity over other related metal ions and a low detection limit of 5...
May 11, 2017: Methods and Applications in Fluorescence
https://www.readbyqxmd.com/read/28390956/the-structure-of-the-amorphous-matrix-of-keratins
#15
Murat Kadir, Xinwei Wang, Bowen Zhu, Jing Liu, Duane Harland, Crisan Popescu
Various keratin fibers, particularly human hairs, were investigated by transmission electron microscopy, TEM, solid-state (1)H NMR and Transient Electro-Thermal Technique, TET. The results converge to suggest that the matrix of keratin fiber cortex, far from being amorphous, has a well-defined nano-scale grainy structure, the size of these grains being around 2-4nm. The size of the grains appears to strongly depend on the chemical treatment of the fiber, on the temperature and on the relative humidity of the environment, as well as on the physiological factors at the level of fiber production in follicle...
April 5, 2017: Journal of Structural Biology
https://www.readbyqxmd.com/read/28325152/synthesis-computational-and-pharmacological-evaluation-of-n-2-benzoyl-4-chlorophenyl-2-4-substituted-phenyl-piperazin-1-yl-acetamides-as-cns-agents
#16
Shweta Verma, Surendra Kumar, Sushil Kumar
A series of new N-(2-benzoyl-4-chlorophenyl)-2-(4-(substituted phenyl) piperazin-1-yl) acetamides (3a-j) have been synthesized by the chloroacetylation of 2-amino-5-chlorbenzophenone which was further reacted with substituted phenylpiperazine. The chemical structures of the compounds were confirmed on the basis of their TLC, IR, 1HNMR, 13CNMR and by elemental analysis. The physicochemical similarity of the target compounds with respect to standard drug diazepam was assessed by calculating from a set of physicochemical properties using software programs...
March 21, 2017: Central Nervous System Agents in Medicinal Chemistry
https://www.readbyqxmd.com/read/28259893/evaluation-of-6-chloro-n-3-4-disubstituted-1-3-thiazol-2-3h-ylidene-1-3-benzothiazol-2-amine-using-drug-design-concept-for-their-targeted-activity-against-colon-cancer-cell-lines-hct-116-hct15-and-ht29
#17
Ming-Li Zhu, Cui-Yue Wang, Cheng-Mian Xu, Wei-Ping Bi, Xiu-Ying ZHou
BACKGROUND Colorectal adenocarcinoma is the second leading cause of cancer-related death in the world. The stage of the disease is related to the survival of the patient, and in early phases surgery is the main modality of treatment. The main aim of modern medicinal chemistry is to synthesize small molecules via drug designing, especially by targeting tumor cells. MATERIAL AND METHODS A new series of 19 compounds containing benzothiazole and thiazole were designed. Molecular docking studies were performed on the designed series of molecules...
March 5, 2017: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/28000563/metabolomics-as-a-functional-tool-in-screening-gastro-intestinal-diseases-where-are-we-in-high-throughput-screening
#18
REVIEW
Rohit Gundamaraju, Ravichandra Vemuri, Rajaraman Eri, Hamilton M Ishiki, Ericsson Coy-Barrera, Nagendra Sastry Yarla, Sócrates Golzio Dos Santos, Mateus Feitosa Alves, José Maria Barbosa Filho, Margareth F F M Diniz, Marcus T Scotti, Luciana Scotti
Identifying novel bio markers in gastro intestinal disease is a promising method where a comprehensive analysis of the metabolome is performed. Metabolomics has evolved enormously in the past decade, paving a path in gastro intestinal disease research, especially diseases which lead to high morbidity and mortality. Metabolomics involves identifying metabolites such as anti-oxidants, and amino acids etc., which are screened in the urine, feces and tissue samples. Certain cases employ advanced tools like GC-MS, 1HNMR and GC-MS/SPME which reveal valuable information concerning disease severity and differentiation...
2017: Combinatorial Chemistry & High Throughput Screening
https://www.readbyqxmd.com/read/27831926/biodegradation-of-micropollutant-naproxen-with-a-selected-fungal-strain-and-identification-of-metabolites
#19
COMPARATIVE STUDY
Y Doruk Aracagök, Hakan Göker, Nilüfer Cihangir
Pharmaceuticals are widely used for treating human and animal diseases. Naproxen [(S) 6-methoxy-α-methyl-2-naphthalene acetic acid] and its sodium salt are members of the α-arylpropionic acid group of nonsteroidal anti-inflammatory drugs. Due to excessive usage of naproxen, this drug has been determined even in drinking water. In this study, four fungal strains Phanerochaete chrysosporium, Funalia trogii, Aspergillus niger, and Yarrowia lipolytica were investigated in terms of naproxen removal abilities. According to LC/MS data, A...
May 1, 2017: Zeitschrift Für Naturforschung. C, A Journal of Biosciences
https://www.readbyqxmd.com/read/27731819/synthesis-antibacterial-and-antifungal-possession-of-amino-acids-containing-sulfonamide-moieties
#20
Muhammad Abdul Qadir, Mahmood Ahmed, Anum Khaleeq
Sulfonamides were developed by the simple reaction of amino acid with p-toluenesulfonyl chloride and structures of the new products (2a, 2b and 2c) were confirmed by elemental and spectral analysis (FT-IR, 1HNMR and13CNMR). In vitro, developed compounds were screened for their antibacterial and antifungal activities against two sensitive bacteria belonging to both gram positive and gram-negative types and two fungi. The synthesized sulfonamides (2a, 2b, 2c) exhibited excellent antifungal activities against the tested fungi...
September 2016: Pakistan Journal of Pharmaceutical Sciences
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