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https://www.readbyqxmd.com/read/29150804/using-citrus-aurantifolia-essential-oil-for-the-potential-biocontrol-of-colocasia-esculenta-taro-leaf-blight-caused-by-phytophthora-colocasiae
#1
Séverin Nguemezi Tchameni, Staelle Njamou Mbiakeu, Modeste Lambert Sameza, Pierre Michel Dongmo Jazet, François Tchoumbougnang
The aim of this work was to evaluate the antimicrobial activities of leaves and epicarp of Citrus aurantifolia essential oil against Phytophthora colocasiae, the causative agent of taro leaf blight. Oils were extracted by hydrodistillation, and their chemical composition was determined by gas chromatography and gas chromatography coupled with mass spectrometry. Antimicrobial activities of oils were tested in vitro against mycelium growth and sporangium production. In situ tests were done on healthy taro leaves, and the necrosis symptoms were evaluated...
November 17, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29150331/anti-amyloidogenic-and-anti-apoptotic-effect-of-%C3%AE-bisabolol-against-a%C3%AE-induced-neurotoxicity-in-pc12-cells
#2
Balakrishnan Shanmuganathan, Venkatesan Suryanarayanan, Sethuraman Sathya, Muralidharan Narenkumar, Sanjeev Kumar Singh, Kandasamy Ruckmani, Kasi Pandima Devi
Alzheimer's disease (AD) is a life-threatening neurodegenerative disorder leading to dementia, with a progressive decline in memory and other thinking skills of elderly populace. Of the multiple etiological factors of AD, the accumulation of senile plaques (SPs) particularly as Aβ oligomers correlates with the relentlessness cognitive impairment in AD patients and play a vital role in AD pathology. Since natural essential oil constituents have successfully served as a source of drugs for AD treatment, the present study aims at the in vitro and in silico investigation of anti-amyloidogenic potential and anti-apoptotic property of the α-bisabolol against Aβ25-35 induced neurotoxicity in PC12 cells...
October 10, 2017: European Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/29149803/chemical-composition-antioxidant-antibacterial-and-cytotoxic-activities-of-essential-oil-of-leontopodium-leontopodioides-willd-beauverd
#3
Yang Gao, Huijuanzi Rao, Ling-Jing Mao, Qing-Lin Ma
The essential oil (EO) from the aerial parts of Leontopodium leontopodioides (Willd.) Beauverd was obtained by hydrodistillation and analysed by GC-FID and GC-MS. Sixty-five compounds were identified which represent 96.2% of the total composition of the EO. The major components of the EO were palmitic acid (11.6%), n-pentadecanal (5.7%), linalool (3.8%), β-ionone (3.3%), hexahydrofarnesyl acetone (3.2%), bisabolone (3.2%) and β-caryophyllene (3.2%). The EO exhibited an excellent antibacterial activity against Staphylococcus aureus and Bacillus subtilis according to the MIC values tested by micro-dilution method...
November 17, 2017: Natural Product Research
https://www.readbyqxmd.com/read/29149027/baccharis-reticularia-dc-and-limonene-nanoemulsions-promising-larvicidal-agents-for-aedes-aegypti-diptera-culicidae-control
#4
Gisele da S Botas, Rodrigo A S Cruz, Fernanda B de Almeida, Jonatas L Duarte, Raquel S Araújo, Raimundo Nonato P Souto, Ricardo Ferreira, José Carlos T Carvalho, Marcelo G Santos, Leandro Rocha, Vera Lúcia P Pereira, Caio P Fernandes
Baccharis reticularia DC. is a plant species from the Asteraceae family that is endemic to Brazil. Despite the great importance of Baccharis genus, no study has been carried out regarding either the phytochemical composition of B. reticularia or the evaluation of its larvicidal potential. Considering the intrinsic immiscibility of essential oils, this study shows larvicidal nanoemulsions containing the B. reticularia phytochemically characterized essential oil and its main constituent against Aedes aegypti...
November 17, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/29147831/plants-of-brazilian-restingas-with-tripanocide-activity-against-trypanosoma-cruzi-strains
#5
Robson Xavier Faria, André Luis Almeida Souza, Barbara Lima, Luis Armando Candido Tietbohl, Caio Pinho Fernandes, Raquel Rodrigues Amaral, Bettina Monika Ruppelt, Marcelo Guerra Santos, Leandro Rocha
Chagas disease is caused by the Trypanosoma cruzi affecting millions of people, and widespread throughout Latin America. This disease exhibits a problematic chemotherapy. Benznidazole, which is the drug currently used as standard treatment, lamentably evokes several adverse reactions. Among other options, natural products have been tested to discover a novel therapeutic drug for this disease. A lot of plants from the Brazilian flora did not contain studies about their biological effects. Restinga de Jurubatiba from Brazil is a sandbank ecosystem poorly studied in relation to plant biological activity...
November 17, 2017: Journal of Bioenergetics and Biomembranes
https://www.readbyqxmd.com/read/29146424/graphene-deposited-onto-aligned-zno-nanorods-as-an-efficient-coating-for-headspace-solid-phase-microextraction-of-gasoline-fractions-from-oil-samples
#6
Congying Wen, Mengmeng Li, Wangbo Li, Zizhou Li, Wei Duan, Yulong Li, Jie Zhou, Xiyou Li, Jingbin Zeng
The content of gasoline fraction in oil samples is not only an important indicator of oil quality, but also an indispensable fundamental data for oil refining and processing. Before its determination, efficient preconcentration and separation of gasoline fractions from complicated matrices is essential. In this work, a thin layer of graphene (G) was deposited onto oriented ZnO nanorods (ZNRs) as a SPME coating. By this approach, the surface area of G was greatly enhanced by the aligned ZNRs, and the surface polarity of ZNRs was changed from polar to less polar, which were both beneficial for the extraction of gasoline fractions...
November 11, 2017: Journal of Chromatography. A
https://www.readbyqxmd.com/read/29146346/enhanced-functionality-of-pea-rice-protein-isolate-blends-through-direct-steam-injection-processing
#7
Ewa Pietrysiak, Denise M Smith, Brennan M Smith, Girish M Ganjyal
Direct steam injection (DSI) processing with pH adjustment was investigated to enhance the functionality of pea-rice protein isolate blends (PR). Protein slurries at concentration of 5%(w/w) of commercial pea and rice protein isolates in the ratio of 2:1(w/w) across a range of steam temperatures (66-107°C) and pH values (2-11) were studied. After DSI treatment, the PR were freeze-dried to obtain the final dry protein powder. Based on protein solubility profiles, the optimal DSI processing conditions were 107°C and pH 11...
March 15, 2018: Food Chemistry
https://www.readbyqxmd.com/read/29145927/corrigendum-to-hypoxia-limits-mouse-follicle-growth-in-vitro
#8
J M Connolly, M T Kane, L R Quinlan, P Dockery, A C Hynes
Ovarian follicle culture is useful for elucidation of factors involved in the regulation of follicular function. We examined the effects of gas phase oxygen concentration, an oil overlay, serum type and medium supplementation with FSH, insulin-transferrin-selenium (ITS) and I-ascorbic acid on cultured preantral mouse follicle growth in a spherical, non-attached follicle culture system. Follicle growth in 5% oxygen was significantly (P<0.01) inferior to growth in 20% oxygen in terms of follicle diameter. This was likely due to hypoxia, as evidenced by significantly (P<0...
February 2017: Reproduction, Fertility, and Development
https://www.readbyqxmd.com/read/29145172/volatiles-from-cinnamomum-cassia-buds
#9
Daniel Sandner, Ulrich Krings, Ralf G Berger
While the chemical composition of leaf and stem bark essential oils of the Chinese cinnamon, Cinnamomum cassia (L.) J. Presl, has been well investigated, little is known about the volatilom of its buds, which appeared recently on German markets. Soxhlet extracts of the commercial samples were prepared, fractionated using silica gel and characterised by gas chromatography-flame ionisation detector (GC-FID) for semi-quantification, by gas chromatography-mass spectrometry (GC-MS) for identification and by GC-FID/olfactometry for sensory evaluation...
November 16, 2017: Zeitschrift Für Naturforschung. C, A Journal of Biosciences
https://www.readbyqxmd.com/read/29144601/anti-bacterial-anti-biofilm-and-anti-quorum-sensing-effects-of-thymus-daenensis-and-satureja-hortensis-essential-oils-against-staphylococcus-aureus-isolates
#10
Aram Sharifi, Abdolmajid Mohammadzadeh, Taghi Zahraei Salehi, Pezhman Mahmoodi
AIMS: The present study was conducted to investigate the effects of Thymus daenensis and Satureja hortensis essential oils (EOs) on the planktonic growth, biofilm formation and quorum sensing (QS) of some Staphylococcus aureus isolates (strong biofilm producers). METHODS AND RESULTS: MIC of the EOs, inhibition of biofilm formation as well as disruption of preformed S. aureus biofilms were assessed. The anti-biofilm activity of the EOs was determined using microtiter-plate test (MtP) and scanning electron microscope (SEM)...
November 16, 2017: Journal of Applied Microbiology
https://www.readbyqxmd.com/read/29144445/critical-review-on-the-significance-of-olive-phytochemicals-in-plant-physiology-and-human-health
#11
REVIEW
Irene Gouvinhas, Nelson Machado, Carla Sobreira, Raúl Domínguez-Perles, Sónia Gomes, Eduardo Rosa, Ana I R N A Barros
Olive oil displays remarkable organoleptic and nutritional features, which turn it into a foodstuff appreciated by consumers, and a basic component of the Mediterranean diet. Indeed, the noticed benefits of including olive oil in the diet have been assigned to the presence of diverse bioactive compounds with different molecular structures. These compounds confer a wide range of biological properties to this food matrix, including the prevention of distinct human diseases as well as the modulation of their severity...
November 16, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/29142428/in-vitro-protoscolicidal-effects-of-cinnamomum-zeylanicum-essential-oil-and-its-toxicity-in-mice
#12
Hossein Mahmoudvand, Hormoz Mahmoudvand, Razieh Tavakoli Oliaee, Amir Tavakoli Kareshk, Seyed Reza Mirbadie, Mohammad Reza Aflatoonian
Background: This study investigates the scolicidal effects of Cinnamomum zeylanicum essential oil against the protoscoleces of hydatid cysts and its toxicity in the mice model. Materials and Methods: Gas chromatography/mass spectroscopy analyses were used to identify the constituents of essential oil. Protoscoleces were treated with different concentrations of the essential oil (6.25-100 µL/mL) in each test tube for 5-30 min. The viability of protoscoleces was confirmed using eosin exclusion test (0...
October 2017: Pharmacognosy Magazine
https://www.readbyqxmd.com/read/29142424/apoptotic-effect-of-nigella-sativa-on-human-lymphoma-u937-cells
#13
Belkis Atasever Arslan, Fatma Busra Isik, Hazal Gur, Fatih Ozen, Tunc Catal
Objective: Nigella sativa is from botanical Ranunculaceae family and commonly known as black seed. Apoptotic effect of N. sativa and its apoptotic signaling pathways on U937 lymphoma cells are unknown. Materials and Methods: In this study, we investigated selective cytotoxic and apoptotic effects of N. sativa extract and its apoptotic mechanisms on U937 cells. In addition, we also studied selective cytotoxic activity of thymoquinone that is the most active essential oil of N...
October 2017: Pharmacognosy Magazine
https://www.readbyqxmd.com/read/29142414/growth-arresting-activity-of-acmella-essential-oil-and-its-isolated-component-d-limonene-1-8-p-mentha-diene-against-trichophyton-rubrum-microbial-type-culture-collection-296
#14
Diptikanta Padhan, Smaranika Pattnaik, Ajaya Kumar Behera
Background: Spilanthes acmella is used as a remedy in toothache complaints by the tribal people of Western part of Odisha, India. Objective: The objective of this study was to study the growth-arresting activity of an indigenous Acmella essential oil (EO) (S. acmella Murr, Asteraceae) and its isolated component, d-limonene against Trichophyton rubrum (microbial type culture collection 296). Materials and Methods: The EO was extracted from flowers of indigenous S...
October 2017: Pharmacognosy Magazine
https://www.readbyqxmd.com/read/29142397/chemical-composition-antimicrobial-and-antitumor-potentiality-of-essential-oil-of-ferula-tingitana-l-apiaceae-grow-in-libya
#15
Waleed Elghwaji, Abeer Mohamed El-Sayed, Kadriya S El-Deeb, Aly M ElSayed
Background: Ferula tingitana L. (Apiaceae) has been considered to have abortive and menstruation-inducing properties. It used to treat sore throat, fever, indigestion, and pains. Objectives: The objective of this study is to establish the chemical composition of the essential oil of flower, leaves of F. tingitana, and to throw light on antimicrobial, cytotoxic activities of Libyan plant. Materials and Methods: The chemical composition of the essential oil of flower (0...
October 2017: Pharmacognosy Magazine
https://www.readbyqxmd.com/read/29142389/bioactive-constituents-radical-scavenging-and-antibacterial-properties-of-the-leaves-and-stem-essential-oils-from-peperomia-pellucida-l-kunth
#16
Sunday O Okoh, Benson C Iweriebor, Omobola O Okoh, Anthony I Okoh
Background: Peperomia pellucida is an annual herbaceous ethnomedicinal plant used in the treatment of a variety of communicable and noncommunicable diseases in the Amazon region. Objective: The study aimed at profiling the bioactive constituents of the leaves and stem essential oils (LEO and SEO) of P. pellucida, their in vitro antibacterial and radical scavenging properties as probable lead constituents in the management of oxidative stress and infectious diseases...
October 2017: Pharmacognosy Magazine
https://www.readbyqxmd.com/read/29139264/-construction-of-cell-factories-for-high-production-of-nerolidol-in-saccharomyces-cerevisiae
#17
Li-Li Zhang, Xiao-Lin Ma, Dong Wang, Peng Yu, Lu-Qi Huang, Xue-Li Zhang, Zhu-Bo Dai
Nerolidol is an important constituent of terpenoid essential oil and has excellent anti-tumor, anti-bacterial, and anti-oxidative properties. For realizing heterogenous production of nerolidol, our research firstly integrated the codon-optimized Actinidia sinensis nerolidol synthase gene (NES) into the terpenoid chassis strain FPP-001, and obtained NES-001 that could produce 2.71 mg•L⁻¹ nerolidol. Then, the N-terminal of the NES was fused with FPS by linker peptide GGGS. With this strategy, nerolidol production improved by 59...
August 2017: Zhongguo Zhong Yao za Zhi, Zhongguo Zhongyao Zazhi, China Journal of Chinese Materia Medica
https://www.readbyqxmd.com/read/29137776/effect-of-ultrasound-treatment-on-the-properties-of-nano-emulsion-films-obtained-from-hazelnut-meal-protein-and-clove-essential-oil
#18
Osman Gul, Furkan Turker Saricaoglu, Aysegul Besir, Ilyas Atalar, Fehmi Yazici
Hazelnut meal protein (4% (w/v)) and clove essential oil (CEO) (3% (v/v)) were homogenized with ultrasound (US) at different times (2, 4 and 6 min) and amplitudes (50, 75 and 100%) to obtain nano-emulsion films. Film forming nano-emulsions (FFNs) were analyzed for average particle size (Dz) and zeta potential, and edible film characterization were evaluated depending on US treatment, as well as antibacterial and antioxidant activities. Dz values and zeta potential of FFNs decreased with increasing acoustic energy delivered to nano-emulsion system...
March 2018: Ultrasonics Sonochemistry
https://www.readbyqxmd.com/read/29137754/proteinaceous-microspheres-as-a-delivery-system-for-carvacrol-and-thymol-in-antibacterial-applications
#19
Chana G Sokolik, Rina Ben-Shabat-Binyamini, Aharon Gedanken, Jean-Paul Lellouche
There is an urgent need for new materials with antimicrobial activity. Phenolic essential oil (EO) compounds with Generally Recognized As Safe (GRAS) status are attractive candidates, but they need suitable delivery systems to overcome specific drawbacks. Core-shell microspheres (MSs) of Bovine Serum Albumin (BSA) or Human Serum Albumin (HSA) encapsulating such active compounds in the oil phase are a delivery system that is novel in combination with phenolic EO compounds. Moreover, the EO compounds can also be assembled in an oil shell around a protein core by choosing an appropriate oil phase...
March 2018: Ultrasonics Sonochemistry
https://www.readbyqxmd.com/read/29134578/experimental-and-computational-comparative-study-of-the-supercritical-fluid-technology-sft-and-kneading-method-in-preparing-%C3%AE-cyclodextrin-complexes-with-two-essential-oils-linalool-and-carvacrol
#20
Nizar A Al-Shar'i, Rana M Obaidat
Supercritical fluid technology (SFT) offers many advantages as a potential complexation method compared to the conventional kneading technique. Its applicability to processess in which solvents are not required is a significant benefit. The main aim of this study was to evaluate, experimentally and computationally, the applicability of SFT in the preparation of β-cyclodextrin complexes with two selected essential oils, namely, carvacrol and linalool. Preparation of the complexes was performed using kneading and SFT method...
November 13, 2017: AAPS PharmSciTech
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