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https://www.readbyqxmd.com/read/27914543/extract-of-syringa-oblata-a-new-biocontrol-agent-against-tobacco-bacterial-wilt-caused-by-ralstonia-solanacearum
#1
Wanming Bai, Fanyu Kong, Yong Lin, Chengsheng Zhang
Ralstonia solanacearum causes serious wilt disease in tobacco. To effectively control this disease, the antibacterial activity of 95% ethanol extracts from the flower buds of Syringa oblata was examined. Based on GC-MS analysis and an inhibition experiment against R. solanacearum, the main antibacterial component is eugenol. We further determined the effect of eugenol on the physiology, biochemistry, and cellular morphology of R. solanacearum. The results showed that eugenol can destroy wilt bacteria, leading to the disappearance of flagella, the leakage of contents, and the appearance of a cavity...
November 2016: Pesticide Biochemistry and Physiology
https://www.readbyqxmd.com/read/27909789/factors-influencing-aversive-learning-in-the-oriental-fruit-fly-bactrocera-dorsalis
#2
J L Liu, H L Chen, X Y Chen, R K Cui, A Guerrero, X N Zeng
Parameters such as the intensity of conditioned and unconditioned stimuli, the inter-trial interval, and starvation time can influence learning. In this study, the parameters that govern aversive learning in the oriental fruit fly, Bactrocera dorsalis, a serious pest of fruits and vegetables, were examined. Male flies were trained to associate the attractive odorant methyl eugenol, a male lure, with a food punishment, sodium chloride solution, and the conditioned suppression of the proboscis-extension response was investigated...
December 1, 2016: Journal of Comparative Physiology. A, Neuroethology, Sensory, Neural, and Behavioral Physiology
https://www.readbyqxmd.com/read/27905512/plant-phenolic-volatiles-inhibit-quorum-sensing-in-pectobacteria-and-reduce-their-virulence-by-potential-binding-to-expi-and-expr-proteins
#3
Janak Raj Joshi, Netaly Khazanov, Hanoch Senderowitz, Saul Burdman, Alexander Lipsky, Iris Yedidia
Quorum sensing (QS) is a population density-dependent regulatory system in bacteria that couples gene expression to cell density through accumulation of diffusible signaling molecules. Pectobacteria are causal agents of soft rot disease in a range of economically important crops. They rely on QS to coordinate their main virulence factor, production of plant cell wall degrading enzymes (PCWDEs). Plants have evolved an array of antimicrobial compounds to anticipate and cope with pathogens, of which essential oils (EOs) are widely recognized...
December 1, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27894698/dual-effects-of-eugenol-on-the-neuronal-excitability-an-in-vitro-study
#4
Jafar Vatanparast, Samira Khalili, Maryam Naseh
Besides its well-known actions on sensory afferents, eugenol also affects general excitability of the nervous system, but the mechanisms involved in the recent effect, especially through modulation of ion channels, have received much less attention. In this study, we studied the effects of eugenol on the excitability of central neurons of land snail Caucasotachea atrolabiata and tried to elucidate the underlying ionic mechanisms. The lower concentration of eugenol (0.5mM) reversibly reduced the frequency of spontaneous action potentials that was associated with elevation of threshold, reduction of maximum slope of rising phase and prolongation of actin potentials...
November 25, 2016: Neurotoxicology
https://www.readbyqxmd.com/read/27892627/withdrawn-pulp-management-for-caries-in-adults-maintaining-pulp-vitality
#5
REVIEW
Hiroshi Miyashita, Helen V Worthington, Alison Qualtrough, Alphons Plasschaert
BACKGROUND: There is a range of treatment options for the management of the pulp in extensively decayed teeth. These include direct and indirect pulp capping, pulpotomy or pulpectomy. If the tooth is symptomatic or if there are periapical bone changes, then endodontic treatment is required. However, if the tooth is asymptomatic but the caries is extensive, there is no consensus as to the best method of management. In addition, there has been a recent move towards using alternative materials and methods such as the direct or indirect placement of bonding agents and mineral trioxide aggregate...
November 28, 2016: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/27885586/an-in-vitro-comparison-of-three-delivery-techniques-for-obturation-of-root-canals-in-primary-molars
#6
T Walia, A H Ghanbari, S Mathew, A H Ziadlou
AIM: This in vitro study evaluated the efficacy of three different obturation techniques with regards to quality of two filling pastes-Ca(OH)2/iodoform syringe paste and zinc oxide eugenol paste in primary molars. METHODS: Root canals of 45 extracted primary molars were prepared and randomly divided into three groups of 15 teeth each. Group A-canals were filled with Ca(OH)2/iodoform syringe paste, Group B-zinc oxide eugenol paste with handheld lentulo spiral and Group C-zinc oxide eugenol paste with rotary lentulo spiral...
November 24, 2016: European Archives of Paediatric Dentistry: Official Journal of the European Academy of Paediatric Dentistry
https://www.readbyqxmd.com/read/27883009/bumble-bee-parasite-strains-vary-in-resistance-to-phytochemicals
#7
Evan C Palmer-Young, Ben M Sadd, Philip C Stevenson, Rebecca E Irwin, Lynn S Adler
Nectar and pollen contain diverse phytochemicals that can reduce disease in pollinators. However, prior studies showed variable effects of nectar chemicals on infection, which could reflect variable phytochemical resistance among parasite strains. Inter-strain variation in resistance could influence evolutionary interactions between plants, pollinators, and pollinator disease, but testing direct effects of phytochemicals on parasites requires elimination of variation between bees. Using cell cultures of the bumble bee parasite Crithidia bombi, we determined (1) growth-inhibiting effects of nine floral phytochemicals and (2) variation in phytochemical resistance among four parasite strains...
November 24, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27876218/antifungal-activities-of-selected-essential-oils-against-fusarium-oxysporum-f-sp-lycopersici-1322-with-emphasis-on-syzygium-aromaticum-essential-oil
#8
Abhishek Sharma, Sasireka Rajendran, Ankit Srivastava, Satyawati Sharma, Bishwajit Kundu
The antifungal effects of four essential oils viz., clove (Syzygium aromaticum), lemongrass (Cymbopogon citratus), mint (Mentha × piperita) and eucalyptus (Eucalyptus globulus) were evaluated against wilt causing fungus, Fusarium oxysporum f. sp. lycopersici 1322. The inhibitory effect of oils showed dose-dependent activity on the tested fungus. Most active being the clove oil, exhibiting complete inhibition of mycelial growth and spore germination at 125 ppm with IC50 value of 18.2 and 0.3 ppm, respectively...
November 18, 2016: Journal of Bioscience and Bioengineering
https://www.readbyqxmd.com/read/27855901/effects-and-mechanisms-of-eugenol-isoeugenol-coniferylaldehyde-and-dihydroeugenol-on-the-riboflavin-sensitized-photooxidation-of-%C3%AE-terpinene-in-methanol
#9
Ju Yeon Lee, Mun Yhung Jung
The effects of eugenol, isoeugenol, coniferylaldehyde, and dihydroeugenol on the riboflavin-sensitized photooxidation of α-terpinene in methanol were studied. Riboflavin greatly accelerated α-terpinene oxidation in methanol during light illumination, resulting in two major oxidation products (p-cymene and ascaridole). The results clearly showed the involvement of Type I and II mechanisms. All the eugenols exerted strong protective activity on riboflavin sensitized photooxidation of α-terpinene. Dihydroeugenol showed the highest protective activity, followed by isoeugenol, coniferylaldehyde, and eugenol, in a decreasing order...
April 1, 2017: Food Chemistry
https://www.readbyqxmd.com/read/27855711/lowering-effects-of-aspirin-eugenol-ester-on-blood-lipids-in-rats-with-high-fat-diet
#10
Isam Karam, Ning Ma, Xi-Wang Liu, Xiao-Jun Kong, Xiao-Le Zhao, Ya-Jun Yang, Jian-Yong Li
BACKGROUND: Aspirin and eugenol were esterified to synthesize aspirin eugenol ester (AEE). As a pale yellow and odourless crystal, AEE reduced the gastrointestinal damage of aspirin and vulnerability of eugenol. The study was conducted to evaluate the preventive effects of AEE on blood lipids in rats with high fat diet (HFD). METHODS: Suspensions of AEE and simvastatin were prepared in 5% carboxymethyl cellulose sodium (CMC-Na). In order to observe the intervention effects, the drugs and HFD were administrated at the same time...
November 17, 2016: Lipids in Health and Disease
https://www.readbyqxmd.com/read/27847138/a-comparative-evaluation-of-the-effect-of-the-addition-of-pachymic-acid-on-the-cytotoxicity-of-4-different-root-canal-sealers-an-in%C3%A2-vitro-study
#11
Senthamilselvan Arun, Vidhya Sampath, Sekar Mahalaxmi, Kothandaraman Rajkumar
INTRODUCTION: Root canal sealers exhibit varying degrees of cytotoxicity to periapical tissues. This in turn results in inflammation, delayed wound healing, and even bone resorption. This study aimed to explore the effect of the addition of an antioxidant like pachymic acid on the cytotoxicity of 4 root canal sealers, namely, Tubliseal (Kerr, Romulus, MI), a zinc oxide eugenol-based sealer; AH Plus (Dentsply De Trey GmbH, Konstanz, Germany), an epoxy resin-based sealer; Sealapex (Kerr), a calcium hydroxide-based sealer; and EndoREZ (Ultradent Products, South Jordan, UT), a methacrylate resin-based sealer...
November 12, 2016: Journal of Endodontics
https://www.readbyqxmd.com/read/27834831/synthesis-and-in-vitro-anti-leishmania-amazonensis-biological-screening-of-morita-baylis-hillman-adducts-prepared-from-eugenol-thymol-and-carvacrol
#12
Francisco José Seixas Xavier, Klinger Antonio da Franca Rodrigues, Ramon Guerra de Oliveira, Claudio Gabriel Lima Junior, Juliana da Câmara Rocha, Tatjana Souza Lima Keesen, Marcia Rosa de Oliveira, Fábio Pedrosa Lins Silva, Mário Luiz Araújo de Almeida Vasconcellos
Leishmaniasis represents a series of severe neglected tropical diseases caused by protozoa of the genus Leishmania and is widely distributed around the world. Here, we present the syntheses of Morita-Baylis-Hillman adducts (MBHAs) prepared from eugenol, thymol and carvacrol, and their bioevaluation against promastigotes of Leishmania amazonensis. The new MBHAs are prepared in two steps from essential oils in moderate to good yields and present IC50 values in the range of 22.30-4.71 μM. Moreover, the selectivity index to the most potent compound is very high (SIrb > 84...
November 8, 2016: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/27829745/a-comparison-of-the-sealing-ability-of-various-temporary-restorative-materials-to-seal-the-access-cavity-an-in-vitro-study
#13
Aji Markose, Ramesh Krishnan, Maya Ramesh, Shishir Singh
INTRODUCTION: In multiple-appointment root canal treatment, a temporary filling material is used to seal the access cavity between visits. The primary function of this material is to prevent the contamination of the root canal system by fluids, organic debris, and bacteria from the oral cavity. MATERIAL AND METHODS: A total of fifty extracted noncarious unrestored human maxillaryanterior teeth with intact crowns and roots were selected The canals were instrumented using stepback technique and sodium hypochlorite (3%) and hydrogen peroxide (3%) were used as irrigants for each specimen alternatively...
October 2016: Journal of Pharmacy & Bioallied Sciences
https://www.readbyqxmd.com/read/27811900/influence-of-a-polymerizable-eugenol-derivative-on-the-antibacterial-activity-and-wettability-of-a-resin-composite-for-intracanal-post-cementation-and-core-build-up-restoration
#14
(no author information available yet)
'...absence of any leachable antibacterial agent.'
November 4, 2016: British Dental Journal
https://www.readbyqxmd.com/read/27808174/essential-oils-and-eugenols-inhibit-biofilm-formation-and-the-virulence-of-escherichia-coli-o157-h7
#15
Yong-Guy Kim, Jin-Hyung Lee, Giyeon Gwon, Soon-Il Kim, Jae Gyu Park, Jintae Lee
Enterohemorrhagic Escherichia coli O157:H7 (EHEC) has caused foodborne outbreaks worldwide and the bacterium forms antimicrobial-tolerant biofilms. We investigated the abilities of various plant essential oils and their components to inhibit biofilm formation by EHEC. Bay, clove, pimento berry oils and their major common constituent eugenol at 0.005% (v/v) were found to markedly inhibit EHEC biofilm formation without affecting planktonic cell growth. In addition, three other eugenol derivatives isoeugenol, 2-methoxy-4-propylphenol, and 4-ethylguaiacol had antibiofilm activity, indicating that the C-1 hydroxyl unit, the C-2 methoxy unit, and C-4 alkyl or alkane chain on the benzene ring of eugenol play important roles in antibiofilm activity...
November 3, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27796969/toxic-effect-of-atalantia-monophylla-essential-oil-on-callosobruchus-maculatus-and-sitophilus-oryzae
#16
Gopal Nattudurai, Kathirvelu Baskar, Micheal Gabrial Paulraj, Villianur Ibrahim Hairul Islam, Savarimuthu Ignacimuthu, Veeramuthu Duraipandiyan
The hydrodistillated essential oil of Atalantia monophylla was subjected to GC-MS. Forty compounds were presented in the essential oil. Eugenol (19.76 %), sabinene (19.57 %), 1,2-dimethoxy-4-(2-methoxyethenyl) benzene (9.84 %), beta-asarone (7.02 %) and methyl eugenol (5.52 %) were found the predominant compounds. The oil was tested for fumigant toxicity and repellent activity against Callosobruchus maculatus and Sitophilus oryzae. The development stage of C. maculatus fecundity, adult emergence and also ovicidal activities were studied by the treatment of A...
October 27, 2016: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/27794386/biotechnological-intervention-in-betelvine-piper-betle-l-a-review-on-recent-advances-and-future-prospects
#17
REVIEW
Suryasnata Das, Reena Parida, I Sriram Sandeep, Sanghamitra Nayak, Sujata Mohanty
Betelvine (Piper betle L.) is cultivated for its deep green heart shaped leaf for (15-20) million Indian and 2 billion foreign consumers annually. The crop provides Rs (6000-7000) million of national income per year and at the same time leaves worth Rs (30-40) million is exported to other countries. The leaves are not only used directly for chewing purposes but also possesses antioxidant, anti-inflammatory, anti-apoptotic, anti-cancer and anti-microbial properties. Besides, the leaves also contain eugenol rich essential oil (1%-3%) which is the source for medicine, stimulant, antiseptic, tonic and other ayurvedic formulations...
October 2016: Asian Pacific Journal of Tropical Medicine
https://www.readbyqxmd.com/read/27794149/microleakage-of-glass-ionomer-based-provisional-cement-in-cad-cam-fabricated-interim-crowns-an-in-vitro-study
#18
Ra'fat I Farah, Naji Al-Harethi
AIM: The aim of this study was to compare in vitro the marginal microleakage of glass ionomer-based provisional cement with resin-based provisional cement and zinc oxide non-eugenol (ZONE) provisional cement in computer-aided design and computer-aided manufacturing (CAD/CAM)-fabricated interim restorations. MATERIALS AND METHODS: Fifteen intact human premolars were prepared in a standardized manner for complete coverage of crown restorations. Interim crowns for the prepared teeth were then fabricated using CAD/CAM, and the specimens were randomized into three groups of provisional cementing agents (n = 5 each): Glass ionomer-based provisional cement (GC Fuji TEMP LT™), bisphenol-A-glycidyldimethacrylate (Bis-GMA)/ triethylene glycol dimethacrylate (TEGDMA) resin-based cement (UltraTemp® REZ), and ZONE cement (TempBond NE)...
October 1, 2016: Journal of Contemporary Dental Practice
https://www.readbyqxmd.com/read/27790583/comparative-assessment-of-antimicrobial-efficacy-of-different-antibiotic-coated-gutta-percha-cones-on-enterococcus-faecalis-an-invitro-study
#19
Vardhaman Mulchand Jain, Gundabaktha Nagappa Karibasappa, Arun Suresh Dodamani, Prashanth Kumar Vishwakarma, Gaurao Vasant Mali
INTRODUCTION: The major goal of endodontic treatment is to eliminate bacteria from the root canals and prevent re-infection. Enterococcus faecalis (E. faecalis) has been attributed to be the most common organism for the endodontic treatment failures. The choice of endodontic material that have high antimicrobial efficacy can help in decreasing/avoiding growth of micro-organisms and facilitate the success rate of treatment. AIM: The present study was designed with an aim to evaluate the antimicrobial efficacy of antibiotic coated gutta-percha cones on E...
September 2016: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/27790570/antimicrobial-efficacy-of-contemporary-obturating-materials-used-in-primary-teeth-an-in-vitro-study
#20
Saumya Navit, Neha Jaiswal, Suleman Abbas Khan, Seema Malhotra, Anshul Sharma, Mukesh, Seema Jabeen, Gaurav Agarwal
INTRODUCTION: Preservation of primary tooth with non-vital pulp has been a major problem for pediatric dentist. In such cases, the preferred treatment modality is pulpectomy. The objective of pulpectomy is complete removal of necrotic and irreversibly infected pulp of an affected tooth but, in spite of chemomechanical preparation and copious irrigation of canal, there are chances of failure of pulp therapy due to the entrapped micro organisms in the canal space owing to the tortuous and complex nature of the root canal system and change in their morphology with root resorption...
September 2016: Journal of Clinical and Diagnostic Research: JCDR
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