Read by QxMD icon Read


Lina Wang, Xinran Zheng, Svetlana Stevanovic, Zhiyuan Xiang, Jing Liu, Huiwen Shi, Jing Liu, Mingzhou Yu, Chun Zhu
Mosquito-repellent incense is one of the most popular products used for dispelling mosquitos during summer in China. It releases large amounts of particulate and gaseous pollutants which constitute a potential hazard to human health. We conducted chamber experiment to characterize major pollutants from three types of mosquito-repellent incenses, further assessed the size-fractionated deposition in human respiratory system, and evaluated the indoor removing efficiency by fresh air. Results showed that the released pollutant concentrations were greater than permissible levels in regulations in GB3095-2012, as well as suggested by the World Health Organization (WHO)...
October 22, 2017: Chemosphere
Mitsuhiko Miyazaki, Ayumi Naito, Takamasa Ikeda, Johanna Klyne, Kenji Sakota, Hiroshi Sekiya, Otto Dopfer, Masaaki Fujii
Solvation plays an essential role in controlling the mechanism and dynamics of chemical reactions in solution. The present study reveals that changes in the local solute-solvent interaction have a great impact on the timescale of solvent rearrangement dynamics. Time-resolved IR spectroscopy has been applied to a hydration rearrangement reaction in the monohydrated 5-hydroxyindole-water cluster induced by photoionization of the solute molecule. The water molecule changes the stable hydration site from the indolic NH site to the substituent OH site, both of which provide a strongly attractive potential for hydration...
November 16, 2017: Physical Chemistry Chemical Physics: PCCP
John W McCall, Marie Varloud, Elizabeth Hodgkins, Abdelmoneim Mansour, Utami DiCosty, Scott McCall, James Carmichael, Ben Carson, Justin Carter
BACKGROUND: This study assessed the influence of a topical ectoparasiticide (dinotefuran-permethrin-pyriproxyfen, DPP, Vectra® 3D, Ceva Animal Health) combined with a macrocyclic lactone (milbemycin oxime, MBO, Interceptor®, Virbac) on transmission of heartworm L3 from mosquitoes to dogs and subsequent development of worms in treated dogs exposed to infected mosquitoes. METHODS: Thirty-two beagle dogs were allocated to four groups of eight: Group 1, untreated controls; Group 2, treated topically with DPP on Day 0; Group 3, treated orally with MBO on Day 51; and Group 4, treated with DPP on Day 0 and MBO on Day 51...
November 9, 2017: Parasites & Vectors
John W McCall, Elizabeth Hodgkins, Marie Varloud, Abdelmoneim Mansour, Utami DiCosty
BACKGROUND: This study assessed the influence of a topical ectoparasiticide (dinotefuran-permethrin-pyriproxyfen, DPP, Vectra®3D, Ceva Animal Health) on the acquisition of heartworm microfilariae by mosquitoes exposed to microfilaremic dogs weekly for 1 month. METHODS: Six beagle dogs (9.2 ± 1.6 kg body weight) infected with Dirofilaria immitis were allocated to two groups of three dogs: an untreated control group and a DPP-treated group. Dogs were treated on Day 0 and exposed under sedation for 1 h to 80 ± 20 unfed Aedes aegypti...
November 9, 2017: Parasites & Vectors
Kathirvelu Baskar, Jeevanantham Ananthi, Savarimuthu Ignacimuthu
Many commercially available agro and household chemicals are used as pesticides, repellents, and growth inhibitors against insect pests. The repeated uses of these chemicals against insect pests have caused the development of resistance in them; they also cause ill effects on nontarget organisms. The present study was aimed to evaluate the antifeedant, larvicidal, pupicidal, and biochemical effects of the solvent extracts of Solanum xanthocarpum against third instar larvae of Helicoverpa armigera. Hexane, chloroform and ethyl acetate extracts were subjected to phytochemical analysis...
November 15, 2017: Environmental Science and Pollution Research International
Abbey B Berenson, Jacqueline M Hirth, Fangjian Guo, Erika L Fuchs, Scott C Weaver
We surveyed pregnant women from the United States to assess the prevention practices they used when traveling to countries with ongoing Zika virus (ZIKV) outbreaks. Of the 749 who agreed to participate, 710 completed the survey's travel questions and 59 of those had traveled to a ZIKV outbreak area in the past 12 months. Only 43% of the women who had traveled to ZIKV outbreak areas reported frequently using mosquito repellant with 32% stating they did not use it at all. They also did not frequently use other recommended methods to prevent mosquito bites...
October 23, 2017: American Journal of Tropical Medicine and Hygiene
Shota Oku, Akiko Hida, Tunchai Mattana, Takahisa Tajima, Yutaka Nakashimada, Junichi Kato
Ralstonia pseudosolanacearum Ps29 showed repellent responses to alcohols including methanol, ethanol, 1-propanol, 2-propanol, 1-butanol, 2-butanol, 1,3-propanediol and prenol. R. pseudosolanacearum Ps29 possesses 22 putative chemoreceptors known as methyl-accepting chemotaxis proteins (MCPs). To identify a MCP involved in negative chemotaxis to ethanol, we measured ethanol chemotaxis of a complete collection of single mcp gene deletion mutants of R. pseudosolanacearum Ps29. However, all the mutants showed repellent responses to ethanol comparable to that of the wild-type strain...
November 14, 2017: Microbiology
S Kalasin, R A Letteri, T Emrick, M M Santore
Poly(2-methacryloyloxyethyl phosphorylcholine) (pMPC), when end-tethered to surfaces by the adsorption of copolymeric cationic segments, forms adsorbed layers that substantially reduce protein adsorption. This study examined variations in the molecular architecture of copolymers containing cationic poly(trimethylammonium ethyl methacrylate (pTMAEMA) anchor blocks that adsorbed strongly to negative surfaces. With appropriate copolymer design, the pTMAEMA blocks were shielded, by pMPC tethers, from solution-phase proteins...
November 14, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
Dae-Yoon Kim, Sang-A Lee, Soeun Kim, Changwoon Nah, Seung Hee Lee, Kwang-Un Jeong
Since the molecular self-assembly of nanomaterials is sensitive to their surface properties, the molecular packing structure on the surface is essential to build the desired chemical and physical properties of nanomaterials. Here, a new nanosurfactant is proposed for the automatic construction of macroscopic surface alignment layer for liquid crystal (LC) molecules. An asymmetric nanosurfactant (C60 NS) consisted of mesogenic cyanobiphenyl moieties with flexible alkyl chains and a [60]fullerene nanoatom is newly designed and precisely synthesized...
November 14, 2017: Small
Gamal A M Abdu-Allah, Barry R Pittendrigh
Selective insecticide application is one important strategy for more precisely targeting harmful insects while avoiding or mitigating collateral damage to beneficial insects like honey bees. Recently, macrocyclic lactone-class insecticides have been introduced into the market place as selective bio-insecticides for controlling many arthropod pests, but how to target this selectivity only to harmful insects has yet to be achieved. In this study, the authors investigated the acute toxicity of fourmacrocyclic lactone insecticides (commercialized as abamectin, emamectin benzoate, spinetoram, and spinosad) both topically and through feeding studies with adult forager honey bees...
November 13, 2017: Ecotoxicology
Ravindra M Samarth, Meenakshi Samarth, Yoshihisa Matsumoto
Aromatic plants are often used as natural medicines because of their remedial and inherent pharmacological properties. Looking into natural resources, particularly products of plant origin, has become an exciting area of research in drug discovery and development. Aromatic plants are mainly exploited for essential oil extraction for applications in industries, for example, in cosmetics, flavoring and fragrance, spices, pesticides, repellents and herbal beverages. Although several medicinal plants have been studied to treat various conventional ailments only a handful studies are available on aromatic plants, especially for radioprotection...
November 2017: Future Science OA
Shahid-Ul-Islam, Shahnawaz Ahmad Wani, Faqeer Mohammad
In recent years, considerable attention has been given to plant colorants for use in dyeing applications because of their newly discovered properties such as insect repellency, deodorizing, antioxidant, sun protection, and antibacterial activity. In view of their better biocompatibility, biodegradability, less-toxicity, natural colorants are gaining worldwide interest for producing elegant hues and highly functional value-added textiles. In the present work, we investigated the coloring and functional finishing of wool with Tectona grandis L leaves extract with the emphasis on effect of metallic salt mordants on colorimetric potential, fastness, radical scavenging potential, and antibacterial activity in an attempt to develop bioactive fibres for use in health care applications...
November 10, 2017: International Journal of Biological Macromolecules
Susanne H Sokolow, Chelsea L Wood, Isabel J Jones, Kevin D Lafferty, Armand M Kuris, Michael H Hsieh, Giulio A De Leo
Control strategies to reduce human schistosomiasis have evolved from 'snail picking' campaigns, a century ago, to modern wide-scale human treatment campaigns, or preventive chemotherapy. Unfortunately, despite the rise in preventive chemotherapy campaigns, just as many people suffer from schistosomiasis today as they did 50 years ago. Snail control can complement preventive chemotherapy by reducing the risk of transmission from snails to humans. Here, we present ideas for modernizing and scaling up snail control, including spatiotemporal targeting, environmental diagnostics, better molluscicides, new technologies (e...
November 7, 2017: Trends in Parasitology
Zelinlan Wang, Zhiguang Guo
Structural colours and superwettability are of great interest due to their unique characteristics. However, the application of materials with either structural colours or superwettability is limited. Moreover, materials possessing both structural colours and superwettability are crucial for many practical applications. The combination of structural colours and superwettability can result in materials for use various applications, such as in sensors, detectors, bioassays, anti-counterfeiting, and liquid actuators, by controlling surfaces to repel or absorb liquids...
November 10, 2017: Chemical Communications: Chem Comm
Daniel John Preston, Youngsup Song, Zhengmao Lu, Dion S Antao, Evelyn N Wang
Lubricant infused surfaces (LIS) are a recently-developed and promising approach to fluid repellency for applications in biology, microfluidics, thermal management, lab-on-a-chip, and beyond. The design of LIS has been explored in past work in terms of surface energies which need to be determined empirically for each interface in a given system. Here, we developed an approach which predicts a priori whether an arbitrary combination of solid and lubricant will repel a given impinging fluid. This model was validated with experiments performed in our work as well as in literature and was subsequently used to develop a new framework for LIS with distinct design guidelines...
November 9, 2017: ACS Applied Materials & Interfaces
Amy M Schwartz, Alison F Hinckley, Paul S Mead, Sarah A Hook, Kiersten J Kugeler
PROBLEM/CONDITION: Lyme disease is the most commonly reported vectorborne disease in the United States but is geographically focal. The majority of Lyme disease cases occur in the Northeast, mid-Atlantic, and upper Midwest regions. Lyme disease can cause varied clinical manifestations, including erythema migrans, arthritis, facial palsy, and carditis. Lyme disease occurs most commonly among children and older adults, with a slight predominance among males. REPORTING PERIOD: 2008-2015...
November 10, 2017: MMWR. Surveillance Summaries: Morbidity and Mortality Weekly Report. Surveillance Summaries
Avijit Das, Jumi Deka, Adil Majeed Rather, Bibhas K Bhunia, Partha Pratim Saikia, Biman B Mandal, Kalyan Raidongia, Uttam Manna
Artificial bio-inspired superhydrophobicity-that are generally developed through appropriate optimization of chemistry and hierarchical topography, is being recognized for its immense prospective applications related to environment and healthcare. Nevertheless, the week interfacial interaction that are associated in the fabrication of such special interfaces-makes the material often delicate, and embedded antifouling property collapses on exposures to harsh and complex aqueous phases, and also after regular physical deformations including bending, creasing etc...
November 9, 2017: ACS Applied Materials & Interfaces
Yan Zhang, Dongchao Zhao, Zhu Meng, Zhaoming Dong, Ying Lin, Shiyi Chen, Qingyou Xia, Ping Zhao, Bill Bendena
The silk of silkworm consists of fibroin fiber coated by sericins. In addition, some nonprotein components were also identified in the sericin fraction. The presence of nonprotein components in the silk has not been well explained. In the present study, methods based on gas chromatography-mass spectrometry were used to identify the metabolites in the cocoon silk from a wild silkworm and two domestic silkworm strains. In total, 45 metabolites were in the cocoon silk, including organic acids, fatty acids, carbohydrates, amino acids, and hydrocarbons...
September 1, 2017: Journal of Insect Science
Hong Jian Zhang, Lian He Zheng, Kuo Zhao, Yan Chen, Zou Yi
In this study, we investigated the insecticidal activities, including contact toxicity, fumigant toxicity, and repellent activity, of Litsea cubeba fruit extracts against Sitophilus zeamais Motschulsky (Coleoptera: Curculionidae). The extracts, obtained by liquid-liquid extraction in n-hexane, ethyl acetate, chloroform, and water were analyzed by gas chromatography-mass spectrometry. Among the different extract types, chloroform extracts exhibited the strongest repellent, contact, and fumigant activities against S...
September 1, 2017: Journal of Insect Science
Seth M Daly, Carolyn R Sturge, Christina F Felder-Scott, Bruce L Geller, David E Greenberg
In late 2015, the first example of a transferrable polymyxin resistance mechanism in Gram-negative pathogens, MCR-1, was reported. Since that report, MCR-1 has been described to occur in many Gram-negative pathogens, and the mechanism of MCR-1-mediated resistance was rapidly determined: an ethanolamine is attached to lipid A phosphate groups, rendering the membrane more electropositive and repelling positively charged polymyxins. Acquisition of MCR-1 is clinically significant because polymyxins are frequently last-line antibiotics used to treat extensively resistant organisms, so acquisition of this mechanism might lead to pan-resistant strains...
November 7, 2017: MBio
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"