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https://www.readbyqxmd.com/read/28930269/chemical-composition-antifungal-and-antioxidant-activities-of-hedyosmum-brasiliense-mart-ex-miq-chloranthaceae-essential-oils
#1
Cynthia Murakami, Inês Cordeiro, Marcus Tullius Scotti, Paulo Roberto H Moreno, Maria Cláudia M Young
Background: Hedyosmum brasiliense Mart. ex Miq. (Chloranthaceae) is a dioecious shrub popularly used in Brazil to treat foot fungi and rheumatism. This work investigated the chemical composition, antifungal, and antioxidant activities of flowers and leaves of H. brasiliense essential oils; Methods: H. brasiliense male and female flowers and leaves were collected at Ilha do Cardoso (São Paulo) and the essential oils were extracted by hydrodistillation and analyzed by GC/MS and their similarity compared by Principal Component Analysis...
July 17, 2017: Medicines (Basel, Switzerland)
https://www.readbyqxmd.com/read/28930264/essential-oil-from-piper-aduncum-chemical-analysis-antimicrobial-assessment-and-literature-review
#2
Lianet Monzote, Ramón Scull, Paul Cos, William N Setzer
Background: The challenge in antimicrobial chemotherapy is to find safe and selective agents with potency that will not be compromised by previously developed resistance. Terrestrial plants could provide new leads to antibacterial, antifungal, or antiprotozoal activity. Methods: The essential oil (EO) of Piper aduncum L. (Piperaceae) from Cuba was analyzed by gas chromatography-mass spectrometry (GC-MS). A cluster analysis of P. aduncum EO compositions reported in the literature was carried out. The EO was screened against a panel of microorganisms (bacteria, fungi, parasitic protozoa) as well as for cytotoxicity against human cells...
July 2, 2017: Medicines (Basel, Switzerland)
https://www.readbyqxmd.com/read/28930262/the-chemotaxonomy-of-common-sage-salvia-officinalis-based-on-the-volatile-constituents
#3
Jonathan D Craft, Prabodh Satyal, William N Setzer
Background: Common sage (Salvia officinalis) is a popular culinary and medicinal herb. A literature survey has revealed that sage oils can vary widely in their chemical compositions. The purpose of this study was to examine sage essential oil from different sources/origins and to define the possible chemotypes of sage oil. Methods: Three different samples of sage leaf essential oil have been obtained and analyzed by GC-MS and GC-FID. A hierarchical cluster analysis was carried out on 185 sage oil compositions reported in the literature as well as the three samples in this study...
June 29, 2017: Medicines (Basel, Switzerland)
https://www.readbyqxmd.com/read/28930251/chemical-profiling-and-evaluation-of-antioxidant-and-anti-microbial-properties-of-selected-commercial-essential-oils-a-comparative-study
#4
Ângelo Luís, Ana Paula Duarte, Luísa Pereira, Fernanda Domingues
Background: The last decades have seen an increased awareness by the scientific community of the extent of resistance to conventional antibiotics, particularly with respect to the emerging multidrug-resistant pathogenic microbes. Additionally, natural antioxidants have received significant attention among food professionals and consumers because of their assumed safety and potential therapeutic value. The aim of this work was to assess the antioxidant activities of eight selected commercial essential oils (EOs), together with the evaluation of their antibacterial and anti-quorum sensing properties...
June 5, 2017: Medicines (Basel, Switzerland)
https://www.readbyqxmd.com/read/28930247/chemical-composition-and-in-vitro-cytotoxic-and-antimicrobial-activities-of-the-essential-oil-from-leaves-of-zanthoxylum-monogynum-st-hill-rutaceae
#5
Fernanda B da Silva, Nara O Dos Santos, Renata C Pascon, Marcelo A Vallim, Carlos R Figueiredo, Roberto C Campos Martins, Patricia Sartorelli
Background: The Zanthoxylum monogynum species belongs to the family Rutaceae and is found in Southeast, Midwest, and Northeast Brazil. For this genus several biological activities have been described. Methods: The essential oil (EO) was obtained from the leaves of Zanthoxylum monogynum by hydro-distillation and was analyzed by gas chromatograph and gas chromatograph/mass spectrometry (GC and GC/MS). Also the EO of Z. monogynum was evaluated for in vitro cytotoxic activity against six tumor cell lines and for antimicrobial activity, performing disk diffusion and MIC assays with yeast and bacterial strains...
May 19, 2017: Medicines (Basel, Switzerland)
https://www.readbyqxmd.com/read/28930244/characterization-and-antioxidant-activity-of-volatile-constituents-from-different-parts-of-aframomum-danielli-hook-k-schum
#6
Emmanuel E Essien, Paul S Thomas, Kelly Oriakhi, Mohammad I Choudhary
Background:Aframomum danielli is used in ethno-medicine for the treatment of several ailments and as a traditional food spice. Methods: The hydro-distilled leaf, stem, seed, rhizome and pod volatile oils of A. danielli were subjected to gas chromatography-mass spectrometry (GC-MS) analysis. Free radical scavenging capacity of the volatile oils was determined using 2,2-diphenyl-1-picrylhydrazyl (DPPH) and ferric reducing antioxidant power (FRAP) assays. Results: Thirty-nine (39) volatile compounds were identified in the oils of A...
May 10, 2017: Medicines (Basel, Switzerland)
https://www.readbyqxmd.com/read/28930243/traditional-small-size-citrus-from-taiwan-essential-oils-bioactive-compounds-and-antioxidant-capacity
#7
Min-Hung Chen, Kai-Min Yang, Tzou-Chi Huang, Mei-Li Wu
Background: The calamondin (Citrus microcarpa Bunge) and the kumquat (Fortunella crassifolia Swingle) are two small-size citrus fruits that have traditionally been consumed in Taiwan; however, there has been a lack of scientific research regarding the active compounds and functionalities of these fruits. Methods: Analysis of volatile composition of essential oil and phytosterol was carried out using Gas Chromatography-Mass Spectrometry (GC-MS). Flavonoid and limonoid were analyzed by High Performance Liquid Chromatography (HPLC)...
May 8, 2017: Medicines (Basel, Switzerland)
https://www.readbyqxmd.com/read/28930241/chemical-composition-antimicrobial-and-antioxidant-activities-of-essential-oils-from-two-avicennia-schaueriana-stapf-leechm-ex-moldenke-acanthaceae-populations
#8
Kamilla N Machado, Telma M Kaneko, Maria Cláudia M Young, Cynthia Murakami, Inês Cordeiro, Paulo Roberto H Moreno
BACKGROUND: Avicennia schaueriana Stapf & Leechm. ex Moldenke (Acanthaceae) is a native species from the Brazilian mangroves presenting ecological and economic significance. This study compared the composition and the biological activities from the essential oils obtained from two A. schaueriana populations collected at Jureia-Itatins and Ilha do Cardoso. METHODS: Essential oils were obtained by conventional means, and their compositions were analyzed by GC-MS...
May 1, 2017: Medicines (Basel, Switzerland)
https://www.readbyqxmd.com/read/28930239/eryngium-foetidum-l-essential-oils-chemical-composition-and-antioxidant-capacity
#9
Paul S Thomas, Emmanuel E Essien, Samuel J Ntuk, Mohammad I Choudhary
Background:Eryngium foetidum essential oils from Nigeria were investigated for the first time in order to ascertain their potency as natural antioxidants. E. foetidum is an aromatic and medicinal herb used in ethno-medicine and as a traditional spice for foods. Methods: The hydro-distilled oils of E. foetidum were subjected to gas chromatography-mass spectrometry (GC-MS) analysis. Free radical scavenging capacity of the volatile oils was determined using 2, 2-diphenyl-1-picrylhydrazyl (DPPH) and ferric reducing antioxidant power (FRAP) assays...
April 28, 2017: Medicines (Basel, Switzerland)
https://www.readbyqxmd.com/read/28928663/comparison-of-the-bioactive-components-in-two-seeds-of-ziziphus-species-by-different-analytical-approaches-combined-with-chemometrics
#10
Sheng Guo, Jin-Ao Duan, Yiqun Li, Ruiqing Wang, Hui Yan, Dawei Qian, Yuping Tang, Shulan Su
The Ziziphus species are considered to be the medicine and food dual purposes plants. Among them, the seed of Ziziphus jujuba var. spinosa (ZS) has traditionally been used as an ethnomedicine in Asian countries for thousands years. Owing to the significant benefits for human health, the demand for ZS increased year by year, and the wild resources have become increasingly scarce, which resulted in a shortage of market supply for ZS and product adulteration by substituting ZS with the seeds of Z. mauritiana Lam...
2017: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/28928657/colocynth-extracts-prevent-epithelial-to-mesenchymal-transition-and-stemness-of-breast-cancer-cells
#11
Kaushik Chowdhury, Ankit Sharma, Suresh Kumar, Gyanesh K Gunjan, Alo Nag, Chandi C Mandal
Modern treatment strategies provide better overall survival in cancer patients, primarily by controlling tumor growth. However, off-target and systemic toxicity, tumor recurrence, and resistance to therapy are still inadvertent hurdles in current treatment regimens. Similarly, metastasis is another deadly threat to patients suffering from cancer. This has created an urgent demand to come up with new drugs having anti-metastatic potential and minimum side effects. Thus, this study was aimed at exploring the anti-proliferative and anti-metastatic potential of colocynth medicinal plant...
2017: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/28928401/metabolic-shift-in-sugars-and-amino-acids-regulates-sprouting-in-saffron-corm
#12
Jayram Bagri, Anupama Yadav, Khalid Anwar, Jeremy Dkhar, Sneh Lata Singla-Pareek, Ashwani Pareek
Saffron is one of the most expensive spices of the world. Since this spice is triploid and meiosis is unusual, it cannot reproduce sexually like other plants; rather, it is propagated vegetatively via an underground corm, which can withstand a long dry dormant period before sprouting. Thus, corms are indispensable to saffron propagation. To identify and analyse signature metabolites associated with the 'dormancy-sprouting' process, non-targeted GC-MS was performed at different stages of corm development. Comparative metabolite profiling reflected dissimilar profiles among the stages as portrayed by differential cluster patterns of metabolites in the PCA and PLS-DA analysis...
September 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28927300/sideritis-romana-l-subsp-purpurea-tal-ex-benth-heywood-a-new-chemotype-from-montenegro
#13
Stefania Garzoli, Mijat Božović, Anna Baldisserotto, Elisa Andreotti, Federico Pepi, Vanja Tadić, Stefano Manfredini, Rino Ragno
A study on essential oil fractions of the Western Balkan endemic Sideritis romana L. subsp. purpurea (Tal. ex Benth.) Heywood collected in Montenegro is reported. The 24-h systematic steam distillation extraction procedure was performed. The gas chromatographic/mass spectrometric (GC/MS) analysis of the fractions showed γ-elemene and spathulenol as two main constituents, revealing a new chemotype of this plant species. Although varying in the content of these two main compounds, which makes the fractions quite different between each other, evaluation of the anti-Candida activity showed the lack of any significant efficacy...
September 19, 2017: Natural Product Research
https://www.readbyqxmd.com/read/28927018/the-effect-of-harvesting-on-the-composition-of-essential-oils-from-five-varieties-of-ocimum-basilicum-l-cultivated-in-the-island-of-kefalonia-greece
#14
Gerasimia Tsasi, Theofilos Mailis, Artemis Daskalaki, Eleni Sakadani, Panagis Razis, Yiannis Samaras, Helen Skaltsa
Five varieties of Ocimum basilicum L. namely lettuce, cinnamon, minimum, latifolia, and violetto were separately cultivated in field and greenhouse in the island Kefalonia (Greece). The effect of successive harvesting to the essential oil content was evaluated. In total 23 samples of essential oils (EOs) were analyzed by GC-FID and GC-MS. Ninety-six constituents, which accounted for almost 99% of the oils, were identified. Cluster analysis was performed for all of the varieties in greenhouse and field conditions, in order to investigate the possible differentiation on the chemical composition of the essential oils, obtained between harvests during growing period...
September 18, 2017: Plants (Basel, Switzerland)
https://www.readbyqxmd.com/read/28926698/quantification-of-lignin-and-its-structural-features-in-plant-biomass-using-13-c-lignin-as-internal-standard-for-pyrolysis-gc-sim-ms
#15
Gijs van Erven, Ries de Visser, Donny W H Merkx, Willem Strolenberg, Peter De Gijsel, Harry Gruppen, Mirjam A Kabel
Understanding mechanisms underlying plant biomass recalcitrance at molecular level can only be achieved by accurate analyses of both content and structural features of the molecules involved. Current quantification of lignin is, however, majorly based on unspecific gravimetric analysis after sulphuric acid hydrolysis. Hence, our research aimed at specific lignin quantification with concurrent characterization of its structural features. Hereto, for the first time, a polymeric (13)C lignin was used as internal standard (IS) for lignin quantification via analytical pyrolysis coupled to gas chromatography with mass-spectrometric detection in selected ion monitoring mode (py-GC-SIM-MS)...
September 19, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28926682/development-of-a-simple-and-valid-method-for-the-trace-determination-of-phthalate-esters-in-human-plasma-using-dispersive-liquid-liquid-microextraction-coupled-with-gc-ms
#16
Karim Ebrahim, Parinaz Poursafa, Mohammad Mehdi Amin
A new method was developed for the trace determination of phthalic acid esters in plasma using dispersive liquid-liquid microextraction and gas chromatography with mass spectrometry analysis. Plasma proteins were efficiently precipitated by trichloroacetic acid and then a mixture of chlorobenzene (as extraction solvent) and acetonitrile (as dispersive solvent) rapidly injected to clear supernatant using a syringe. After the centrifuging, chlorobenzene were sedimented in the bottom of the test tube. 1 μL of this sedimented phase was injected into the gas chromatograph for phthalic acid esters analysis...
September 19, 2017: Journal of Separation Science
https://www.readbyqxmd.com/read/28926195/non-targeted-volatile-profiles-for-the-classification-of-the-botanical-origin-of-chinese-honey-by-solid-phase-microextraction-and-gc-ms-combined-with-chemometrics
#17
Hui Chen, Linghe Jin, Chunlin Fan, Wenwen Wang
A potential method for the discrimination and prediction of honey samples of various botanical origins was developed based on the non-targeted volatile profiles obtained by solid-phase microextraction with gas chromatography and mass spectrometry combined with chemometrics. The blind analysis of non-targeted volatile profiles was carried out using solid-phase microextraction with gas chromatography and mass spectrometry for 87 authentic honey samples from four botanical origins (acacia, linden, vitex and rape)...
September 19, 2017: Journal of Separation Science
https://www.readbyqxmd.com/read/28926063/methylglyoxal-attenuates-insulin-signaling-and-downregulates-the-enzymes-involved-in-cholesterol-biosynthesis
#18
Arati B Deshmukh, Shakuntala Bai, Aarthy T, Rubina S Kazi, Reema Banarjee, Rajeshwari Rathore, Vijayakumar Mv, Thulasiram Hv, Manoj Kumar Bhat, Kulkarni Mj
Methylglyoxal (MG) is a highly reactive dicarbonyl known to be elevated under the hyperglycemic conditions of diabetes and is implicated in the development of diabetic complications. Therefore, the current study investigates the role of MG in exacerbating insulin resistance at the insulin signaling level, as well as its effect on the global proteomic level. By using insulin sensitive rat muscle cells (L6) and Chinese hamster ovary (CHO) cells stably expressing the insulin receptor (IR) and a glucose transporter fused with green fluorescent protein (GLUT4-GFP), we have observed that MG impairs insulin signaling, inhibits GLUT4 translocation and reduces glucose uptake...
September 19, 2017: Molecular BioSystems
https://www.readbyqxmd.com/read/28926062/selectivity-of-solid-phase-extraction-for-dissolved-organic-matter-in-the-hypersaline%C3%A2-da-qaidam-lake-china
#19
Keli Yang, Yaoling Zhang, Yaping Dong, Wu Li
Dissolved organic matter (DOM) was isolated from the hypersaline Da Qaidam Lake using solid-phase extraction (SPE) methods with five different adsorbents: ENVI-Carb (non-porous graphitized carbon), HLB, PPL, and XAD-8 (polymer based), and ENVI-18 (silica based). Structure-selective assessments of SPE-DOM isolated using the different adsorbents were conducted using a combination of complementary analysis techniques, including dissolved organic carbon (DOC) and dissolved organic nitrogen (DON) analysis, as well as elemental analysis, Fourier transformed infrared spectroscopy (FTIR), (1)H nuclear magnetic resonance ((1)H NMR) and pyrolysis-gas chromatography-mass spectrometry (Py-GC/MS)...
September 19, 2017: Environmental Science. Processes & Impacts
https://www.readbyqxmd.com/read/28924453/a-novel-and-efficient-fungal-delignification-strategy-based-on-versatile-peroxidase-for-lignocellulose-bioconversion
#20
Wen Kong, Xiao Fu, Lei Wang, Ahmad Alhujaily, Jingli Zhang, Fuying Ma, Xiaoyu Zhang, Hongbo Yu
BACKGROUND: The selective lignin-degrading white-rot fungi are regarded to be the best lignin degraders and have been widely used for reducing the saccharification recalcitrance of lignocellulose. However, the biological delignification and conversion of lignocellulose in biorefinery is still limited. It is necessary to develop novel and more efficient bio-delignification systems. RESULTS: Physisporinus vitreus relies on a new versatile peroxidase (VP)-based delignification strategy to remove enzymatic recalcitrance of corn stover efficiently, so that saccharification of corn stover was significantly enhanced to 349...
2017: Biotechnology for Biofuels
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