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https://www.readbyqxmd.com/read/28522004/development-of-biocompatible-glycodynameric-hydrogels-joining-two-natural-motifs-by-dynamic-constitutional-chemistry
#1
Luminita Marin, Daniela Ailincai, Simona Morariu, Liliana Tartau-Mititelu
The paper focusses on the synthesis of novel hydrogels by joining natural biodegradable compounds with the aim to achieve biocompatible materials for bio related applications. The hydrogels were prepared from chitosan and citral by constitutional dynamic chemistry, incorporating both molecular and supramolecular dynamic features. The hydrophobic flexible citral has been reversible immobilized onto the hydrophilic chitosan backbone via imine bonds to form amphiphilic glycodynamers, which further self-ordered through supramolecular interactions into a 3D-network of biodynameric hydrogel...
August 15, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28490124/explaining-the-antioxidant-activity-of-some-common-non-phenolic-components-of-essential-oils
#2
Andrea Baschieri, Majlinda Daci Ajvazi, Judith Laure Folifack Tonfack, Luca Valgimigli, Riccardo Amorati
Limonene, linalool and citral are common non-phenolic terpenoid components of essential oils, with attributed controversial antioxidant properties. The kinetics of their antioxidant activity was investigated using the inhibited autoxidation of a standard model substrate. Results indicate that antioxidant behavior of limonene, linalool and citral occurs by co-oxidation with the substrate, due to very fast self-termination and cross-termination of the oxidative chain. Rate constants kp and 2kt, (M(-1)s(-1)) at 30°C were 4...
October 1, 2017: Food Chemistry
https://www.readbyqxmd.com/read/28446915/pruning-system-and-foliar-application-of-mgso-4-alter-yield-and-secondary-metabolite-profile-of-rosa-damascena-under-rainfed-acidic-conditions
#3
Probir K Pal, Mitali Mahajan
Damask rose (Rosa damascena Mill.) is one of the most high-value essential oil-bearing plants in the world. However, the flower yield and quality of essential oil of R. damascena are largely influenced by the pruning practices and balanced supply of plant nutrition. The objective of this study was to test the hypothesis whether the pruning system and foliar fertilization of MgSO4 would influence the flower yield, growth and secondary metabolites profile of R. damascena. A field experiment of 10 treatment combinations comprising two pruning systems (complete and partial) and five levels of MgSO4 (water spray, MgSO4 @ 5...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28422054/growth-inhibition-of-sulfate-reducing-bacteria-in-produced-water-from-the-petroleum-industry-using-essential-oils
#4
Pamella Macedo de Souza, Fátima Regina de Vasconcelos Goulart, Joana Montezano Marques, Humberto Ribeiro Bizzo, Arie Fitzgerald Blank, Claudia Groposo, Maíra Paula de Sousa, Vanessa Vólaro, Celuta Sales Alviano, Daniela Sales Alviano Moreno, Lucy Seldin
Strategies for the control of sulfate-reducing bacteria (SRB) in the oil industry involve the use of high concentrations of biocides, but these may induce bacterial resistance and/or be harmful to public health and the environment. Essential oils (EO) produced by plants inhibit the growth of different microorganisms and are a possible alternative for controlling SRB. We aimed to characterize the bacterial community of produced water obtained from a Brazilian petroleum facility using molecular methods, as well as to evaluate the antimicrobial activity of EO from different plants and their major components against Desulfovibrio alaskensis NCIMB 13491 and against SRB growth directly in the produced water...
April 19, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28420101/the-effect-of-citrus-essential-oils-and-their-constituents-on-growth-of-xanthomonas-citri-subsp-citri
#5
Hossein Mirzaei-Najafgholi, Saeed Tarighi, Morteza Golmohammadi, Parissa Taheri
Citrus bacterial canker (CBC) caused by Xanthomonas citri subsp. citri (Xcc), is the most devastating of the citrus diseases worldwide. During our study, we found that Essential oils (EOs) of some citrus cultivars are effective on Xcc. Therefore, it prompted us to determine the plant metabolites responsible for the antibacterial properties. We obtained EOs from some locally cultivated citrus by using a Clevenger apparatus and their major constituents were identified by gas chromatography/mass spectrometry (GC-MS)...
April 14, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28351318/cytotoxicity-of-citral-against-melanoma-cells-the-involvement-of-oxidative-stress-generation-and-cell-growth-protein-reduction
#6
Larissa Juliani Sanches, Poliana Camila Marinello, Carolina Panis, Tatiane Renata Fagundes, José Andrés Morgado-Díaz, Julio Cesar Madureira de-Freitas-Junior, Rubens Cecchini, Alessandra Lourenço Cecchini, Rodrigo Cabral Luiz
Citral is a natural compound that has shown cytotoxic and antiproliferative effects on breast and hematopoietic cancer cells; however, there are few studies on melanoma cells. Oxidative stress is known to be involved in all stages of melanoma development and is able to modulate intracellular pathways related to cellular proliferation and death. In this study, we hypothesize that citral exerts its cytotoxic effect on melanoma cells by the modulation of cellular oxidative status and/or intracellular signaling...
March 2017: Tumour Biology: the Journal of the International Society for Oncodevelopmental Biology and Medicine
https://www.readbyqxmd.com/read/28316634/anti-inflammatory-activity-of-the-essential-oil-citral-in-experimental-infection-with-staphylococcus-aureus-in-a-model-air-pouch
#7
Hellen Braga Martins, Nathan das Neves Selis, Clarissa Leal Silva E Souza, Flávia S Nascimento, Suzi Pacheco de Carvalho, Lorena D'Oliveira Gusmão, Jannine Dos Santos Nascimento, Anne Karoline Pereira Brito, Samira Itana de Souza, Marcio Vasconcelos de Oliveira, Jorge Timenetsky, Regiane Yatsuda, Ana Paula T Uetanabaro, Lucas M Marques
This study proposes to implement an alternative and effective strategy for local treatment of disease provoked by S. aureus. For the analysis of possible anti-inflammatory activity of essential oil, after establishing an air pouch model, 48 male mice of Balb/c were treated, infected, and euthanized at 4 and 8 h. Thus, the total and differential white blood cells were counted in the animal's blood, and cytokines IL-1β, IL-6, and TNF-α were titrated using ELISA in the air pouch lavage. Moreover, TNF-α, IL-1β, and IL-6 gene expression was analyzed through an RT-qPCR array, and S...
2017: Evidence-based Complementary and Alternative Medicine: ECAM
https://www.readbyqxmd.com/read/28250025/synthesis-of-apo-13-and-apo-15-lycopenoids-cleavage-products-of-lycopene-that-are-retinoic-acid-antagonists
#8
Sureshbabu Narayanasamy, Jian Sun, Ryan E Pavlovicz, Abdulkerim Eroglu, Cassandra E Rush, Benjamin D Sunkel, Chenglong Li, Earl H Harrison, Robert W Curley
Consumption of the tomato carotenoid, lycopene, has been associated with favorable health benefits. Some of lycopene's biological activity may be due to metabolites resulting from cleavage of the lycopene molecule. Because of their structural similarity to the retinoic acid receptor (RAR) antagonist, β-apo-13-carotenone, the "first half" putative oxidative cleavage products of the symmetrical lycopene have been synthesized. All transformations proceed in moderate to good yield and some with high stereochemical integrity allowing ready access to these otherwise difficult to obtain terpenoids...
May 2017: Journal of Lipid Research
https://www.readbyqxmd.com/read/28235740/influence-of-metals-on-essential-oil-content-and-composition-of-lemongrass-cymbopogon-citratus-d-c-stapf-grown-under-different-levels-of-red-mud-in-sewage-sludge-amended-soil
#9
Meenu Gautam, Madhoolika Agrawal
Lemongrass is a commercially important perennial herb with medicinal value and ability to tolerate high alkaline and saline conditions. Essential oil bearing plants can grow safely in soil contaminated with heavy metals without severe effects on morphology and oil yield. The present study was aimed to assess the essential oil content and composition in lemongrass in response to elevated metals in above-ground plant parts. Pot experiment was conducted for six months using sewage sludge as soil amendment (soil: sludge: 2:1 w/w) followed by red mud treatments (0, 5, 10 and 15% w/w)...
May 2017: Chemosphere
https://www.readbyqxmd.com/read/28185379/feed-degradability-rumen-fermentation-and-blood-metabolites-in-response-to-essential-oil-addition-to-fistulated-non-lactating-dairy-cow-diets
#10
Wisitiporn Suksombat, Atitthan Nanon, Chayapol Meeprom, Pipat Lounglawan
The effects of essential oils (EOs) on ruminal nutrient disappearance, rumen fermentation and blood metabolites in fistulated non-lactating dairy cows were studied. Four fistulated non-lactaing dairy cows were used in a 4 × 4 Latin square design; the experiment consisted of four periods of 21 days in each period, with the first 14 days for adaptation followed by 7 days of measurement period. Animals were fed 3 kg/day of 21% crude protein (CP) concentrate and ad libitum corn silage. Treatments were: (i) control; (ii) 2 mL Allicin/cow/day; (iii) 2 mL zingiberene/cow/day; and (iv) 2 mL citral/cow/day...
February 9, 2017: Animal Science Journal, Nihon Chikusan Gakkaihō
https://www.readbyqxmd.com/read/28178379/antigenotoxic-effect-against-ultraviolet-radiation-induced-dna-damage-of-the-essential-oils-from-lippia-species
#11
Nathalia Quintero Ruiz, Yuri Córdoba Campo, Elena E Stashenko, Jorge Luis Fuentes
The antigenotoxicity against ultraviolet radiation (UV)-induced DNA damage of essential oils (EO) from Lippia species was studied using SOS Chromotest. Based on the minimum concentration that significantly inhibits genotoxicity, the genoprotective potential of EO from highest to lowest was Lippia graveolens, thymol-RC ≈ Lippia origanoides, carvacrol-RC ≈ L. origanoides, thymol-RC > Lippia alba, citral-RC ≈ Lippia citriodora, citral-RC ≈ Lippia micromera, thymol-RC > L. alba, myrcenone-RC. EO from L...
February 8, 2017: Photochemistry and Photobiology
https://www.readbyqxmd.com/read/28177735/protective-effects-of-essential-oil-of-citrus-limon-against-aspirin-induced-toxicity-in-iec-6-cells
#12
Hafsia Bouzenna, Najla Hfaiedh, Marie-Agnès Giroux-Metges, Abdelfattah Elfeki, Hélène Talarmin
Aspirin, one of the widely used nonsteroidal anti-inflammatory drugs, is the most highly consumed pharmaceutical product in the world. However, it has several side effects in cells. This study was designed to investigate the antioxidative activity and cytoprotective effects of essential oil of Citrus limon (EOC) extracted from leaves against aspirin-induced damages in the rat small intestine epithelial cells (IEC-6). Biochemical indicators were used to assess cytotoxicity and oxidative damages caused by aspirin treatment on IEC-6...
May 2017: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
https://www.readbyqxmd.com/read/28176464/enantioselective-reduction-of-citral-isomers-in-ncr-ene-reductase-analysis-of-an-active-site-mutant-library
#13
Nico Kress, Johanna Rapp, Bernhard Hauer
A deeper understanding of the >99 % S-selective reduction of both isomers of citral catalyzed by NCR ene reductase was achieved by active-site mutational studies and docking simulation. Though structurally similar, the E/Z isomers of citral showed a significantly varying selectivity response to introduced mutations. Although it was possible to invert (E)-citral reduction enantioselectivity to ee 46 % (R) by introducing mutation W66A, for (Z)-citral it remained ≥88 % (S) for all single-residue variants...
February 8, 2017: Chembiochem: a European Journal of Chemical Biology
https://www.readbyqxmd.com/read/28158965/largely-different-contents-of-terpenoids-in-beef-red-flesh-tangerine-and-its-wild-type
#14
Wenyun Li, Cuihua Liu, Min He, Jinqiang Li, Yongqiang Cai, Yuhua Ma, Juan Xu
BACKGROUND: Niurouhong (Citrus reticulata Blanco. Niurouhong) (NRH) is a spontaneous beef-red flesh mutant with distinctive flavor compared with its wild type orange-red flesh Zhuhongju (ZHJ). To illustrate the biochemical mechanism of its special flesh color and flavor, fruits at commercial mature stage were used to profile the volatiles in the flavedo and determine the levels of carotenoids, limonoid aglycones and phytohormones in the juice sacs in two seasons. RESULTS: Our results showed the content of total volatile terpenoids in NRH was 1...
February 3, 2017: BMC Plant Biology
https://www.readbyqxmd.com/read/28106093/insecticidal-toxicities-of-carvacrol-and-thymol-derived-from-thymus-vulgaris-lin-against-pochazia-shantungensis-chou-lu-newly-recorded-pest
#15
Jun-Hwan Park, Ye-Jin Jeon, Chi-Hoon Lee, Namhyun Chung, Hoi-Seon Lee
The insecticidal toxicities of five essential oils against Pochazia shantungensis adults and nymphs, newly recorded pests, were evaluated. The LC50 values of Thymus vulgaris, Ruta graveolens, Citrus aurantium, Leptospermum petersonii and Achillea millefolium oils were recorded as 57.48, 84.44, 92.58, 113.26 and 125.78 mg/L, respectively, against P. shantungensis nymphs using the leaf dipping bioassay, and 75.80, 109.86, 113.26, 145.06 and 153.74 mg/L, respectively, against P. shantungensis adults using the spray bioassay method...
January 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28103929/chemical-composition-and-some-biological-activities-of-the-essential-oils-from-basil-ocimum-different-cultivars
#16
Arpi Avetisyan, Anahit Markosian, Margarit Petrosyan, Naira Sahakyan, Anush Babayan, Samvel Aloyan, Armen Trchounian
BACKGROUND: The plants belonging to the Ocimum genus of the Lamiaceae family are considered to be a rich source of essential oils which have expressed biological activity and use in different area of human activity. There is a great variety of chemotypes within the same basil species. Essential oils from three different cultivars of basil, O. basilicum var. purpureum, O. basilicum var. thyrsiflora, and O. citriodorum Vis. were the subjects of our investigations. METHODS: The oils were obtained by steam distillation in a Clevenger-type apparatus...
January 19, 2017: BMC Complementary and Alternative Medicine
https://www.readbyqxmd.com/read/28093037/encapsulation-of-lemongrass-oil-with-cyclodextrins-by-spray-drying-and-its-controlled-release-characteristics
#17
Sarunya Phunpee, Uracha Rangsadthong Ruktanonchai, Hidefumi Yoshii, Suttichai Assabumrungrat, Apinan Soottitantawat
Inclusion of the two isomers of citral (E-citral and Z-citral), components of lemongrass oil, was investigated within the confines of various cyclodextrin (α-CD, β-CD and γ-CD) host molecules. Aqueous complex formation constants for E-citral with α-CD, β-CD and γ-CD were determined to be 123, 185, and 204 L/mol, respectively, whereas Z-citral exhibited stronger affinities (157, 206, and 253 L/mol, respectively). The binding trend γ-CD > β-CD > α-CD is a reflection of the more favorable geometrical accommodation of the citral isomers with increasing cavity size...
April 2017: Bioscience, Biotechnology, and Biochemistry
https://www.readbyqxmd.com/read/28088731/biological-properties-of-citral-and-its-potential-protective-effects-against-cytotoxicity-caused-by-aspirin-in-the-iec-6-cells
#18
Hafsia Bouzenna, Najla Hfaiedh, Marie-Agnès Giroux-Metges, Abdelfattah Elfeki, Hélène Talarmin
Citral, 3,7-dimethyl-2,6-octadienal, is a key component of several essential oils extracted from lemon-scented herbal plants. The present study was designed to investigate the antioxidant activities of citral and assess its possible protective effects against aspirin-induced toxicity in vitro. We used IEC-6 cells (rat small intestine epithelial cells). The antioxidant activities were determined by 1,1-diphenyl-2-picrylhydrazyl (DPPH), β-carotene/linoleic acid and Ferric reducing antioxidant power (FRAP). Cytotoxicity was evaluated by cell viability, anti-oxidant enzyme activities, malondialdehyde (MDA) production and by the expression of MAPKs (Mitogen-Activated Protein Kinases) pathways...
March 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/27979111/preparation-and-characterization-of-essential-oil-loaded-starch-nanoparticles-formed-by-short-glucan-chains
#19
Chao Qiu, Ranran Chang, Jie Yang, Shengju Ge, Liu Xiong, Mei Zhao, Man Li, Qingjie Sun
Essential oils (EOs), including menthone, oregano, cinnamon, lavender, and citral, are natural products that have antimicrobial and antioxidant activities. However, extremely low water solubility, and easy degradation by heat, restrict their application. The aim of this work was to evaluate the enhancement in antioxidative and antimicrobial activities of EOs encapsulated in starch nanoparticles (SNPs) prepared by short glucan chains. For the first time, we have successfully fabricated menthone-loaded SNPs (SNPs-M) at different complexation temperatures (30, 60, and 90°C) by an in situ nanoprecipitation method...
April 15, 2017: Food Chemistry
https://www.readbyqxmd.com/read/27976108/ginger-oil-and-its-active-ingredient-citral-relax-rat-airway-smooth-muscle-by-calcium-channel-blockade
#20
T Mangprayool, N Chudapongse
No abstract text is available yet for this article.
December 2016: Planta Medica
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