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https://www.readbyqxmd.com/read/29050428/effect-of-an-organic-acids-based-feed-additive-and-enrofloxacin-on-the-prevalence-of-antibiotic-resistant-e-coli-in-cecum-of-broilers
#1
Nataliya Roth, Sigrid Mayrhofer, Martin Gierus, Christine Weingut, Christiane Schwarz, Barbara Doupovec, Roger Berrios, Konrad J Domig
Increasing antibiotic resistance is a major public health concern. Fluoroquinolones are used to treat and prevent poultry diseases worldwide. Fluoroquinolone resistance rates are high in their countries of use. The aim of this study was to evaluate the effect of an acids-based feed additive, as well as fluoroquinolone antibiotics, on the prevalence of antibiotic-resistant E. coli. A total of 480 broiler chickens (Ross 308) were randomly assigned to 3 treatments: a control group receiving a basal diet; a group receiving a feed additive (FA) based on formic acid, acetic acid and propionic acid; and an antibiotic enrofloxacin (AB) group given the same diet, but supplemented with enrofloxacin in water...
September 1, 2017: Poultry Science
https://www.readbyqxmd.com/read/29050415/influence-of-the-incorporation-mode-of-sugar-beet-pulp-in-the-finishing-diet-on-the-digestive-tract-and-performances-of-geese-reared-for-foie-gras-production
#2
J Arroyo, F Lavigne, C Bannelier, L Fortun-Lamothe
The aim of this work was to study the effects of incorporating sugar beet pulp (SBP) into the diet of geese in two feeding systems (complete pelleted feed or loose-mix feeding system) on crop development and performance. A total of 480 1-d-old male geese were divided into three groups whose diet differed from d 56 to 90: a complete pelleted diet containing 50% corn (control diet: AMEn 11.5 MJ/kg; CP 161 g/kg), and no SBP; a complete pelleted diet containing 50% corn and 10% SBP (SBPcp diet: AMEn: 11.5 MJ/kg; CP: 161 g/kg); and a mix in the same feeder (SBPlm diet) of 500 g/kg of protein-rich pellets containing 20% SBP (SBPprp: AMEn: 9...
September 1, 2017: Poultry Science
https://www.readbyqxmd.com/read/29050283/omeprazole-promotes-carcinogenesis-of-fore-stomach-in-mice-with-co-stimulation-of-nitrosamine
#3
Lei Huang, Dong-Jiang Qi, Wei He, A-Man Xu
OBJECTIVES: To investigate if oral omeprazole application induces cancers of fore and glandular stomach in mice. METHODS: A total of 66 eligible male mice were randomly divided into 6 groups, which were treated with control reagent, low (6 mg/kg) and high dose omeprazole (30 mg/kg), N-methyl-N'-nitro-N-nitrosoguanidine (MNNG, 100 mg/L water), and MNNG plus low and high dose omeprazole, respectively. After 24 weeks, concentrations of acid phosphatase (ACP) and N-acetyl-β-D-glucosaminidase(NAG) in serum and spleen was examined, and p21 and mTOR levels in stomach were detected...
September 19, 2017: Oncotarget
https://www.readbyqxmd.com/read/29050026/new-preventive-approaches-part-i-functional-peptides-and-other-therapies-to-prevent-tooth-demineralization
#4
Marília Afonso Rabelo Buzalaf, Juliano Pelim Pessan
The limited effect of fluoride on root caries has prompted the study of new preventive therapies, which involve recently developed functional peptides, lasers, phosphate-based technologies, among several other approaches. Most of the specific peptides currently investigated have been developed based on the available information related to the protective action of salivary proteins, including statherin-derived peptides. Other peptides include 8DSS, self-assembling peptide P11-4, antimicrobial peptides, and casein phosphopeptides combined with amorphous calcium phosphate...
2017: Monographs in Oral Science
https://www.readbyqxmd.com/read/29049974/photolysis-study-of-octyl-p-methoxycinnamate-loaded-microemulsion-by-molecular-fluorescence-and-chemometric-approach
#5
Danielle Silva Nascimento, Matías Insausti, Beatriz Susana Fernández Band, Marcos Grünhut
Octyl p-methoxycinnamate (OMC) is one of the most widely used sunscreen agents. However, the efficiency of OMC as UV filter over time is affected due to the formation of the cis-isomer which presents a markedly lower extinction coefficient (εcis=12,600L mol(-1)cm(-1) at 291nm) than the original trans-isomer (εtrans=24,000L mol(-1)cm(-1) at 310nm). In this work, a novel carrier for OMC based on an oil-in-water microemulsion is proposed in order to improve the photostability of this sunscreen. The formulation was composed of 29...
October 10, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/29049968/a-novel-eulerian-approach-for-modelling-cyanobacteria-movement-thin-layer-formation-and-recurrent-risk-to-drinking-water-intakes
#6
Mouhamed Ndong, David Bird, Tri Nguyen Quang, René Kahawita, David Hamilton, Marie Laure de Boutray, Michèle Prévost, Sarah Dorner
Toxic cyanobacteria (CB) blooms are being reported in an increasing number of water bodies worldwide. As drinking water (DW) treatment can be disrupted by CB, in addition to long term management plans, short term operational decision-making tools are needed that enable an understanding of the temporal variability of CB movement in relation to drinking water intakes. In this paper, we propose a novel conservative model based on a Eulerian framework and compare results with data from CB blooms in Missisquoi Bay (Québec, Canada)...
October 10, 2017: Water Research
https://www.readbyqxmd.com/read/29049967/halogenated-fatty-amides-a-brand-new-class-of-disinfection-by-products
#7
Dmitry S Kosyakov, Nikolay V Ul'yanovskii, Mark S Popov, Tomas B Latkin, Albert T Lebedev
An array of similar halogenated nitrogen-containing compounds with elemental composition CnH2nNO2X, CnH2n-2NO2X and CnH2n-1NOX2 (X = Cl, Br; n = 16, 18, 22) was detected in drinking water with high performance liquid chromatography - high resolution mass spectrometry (HPLC-HRMS) method. Compounds of this type were never mentioned among disinfection by-products. Tandem mass spectrometry allowed referring them to halohydrines or dihalogenated fatty amides, the products of conjugated electrophilic addition of halogens to the double bonds of unsaturated fatty amides...
October 6, 2017: Water Research
https://www.readbyqxmd.com/read/29049965/development-of-a-molecular-method-for-testing-the-effectiveness-of-uv-systems-on-site
#8
Limor Nizri, Dalit Vaizel-Ohayon, Hila Ben-Amram, Yehonatan Sharaby, Malka Halpern, Hadas Mamane
We established a molecular method for quantifying ultraviolet (UV) disinfection efficacy using total bacterial DNA in a water sample. To evaluate UV damage to the DNA, we developed the "DNA damage" factor, which is a novel cultivation-independent approach that reveals UV-exposure efficiency by applying a simple PCR amplification method. The study's goal was to prove the feasibility of this method for demonstrating the efficiency of UV systems in the field using flow-through UV reactors. In laboratory-based experiments using seeded bacteria, the DNA damage tests demonstrated a good correlation between PCR products and UV dose...
October 10, 2017: Water Research
https://www.readbyqxmd.com/read/29049961/smartphone-app-based-portable-sensor-for-the-detection-of-fluoro-surfactant-pfoa
#9
Cheng Fang, Xian Zhang, Zhaomin Dong, Liang Wang, Mallavarapu Megharaj, Ravi Naidu
We developed a smartphone app-based monitoring tool for the detection of anionic surfactants (AS), including perfluorooctanoic acid (PFOA) and perfluorooctane sulfonate (PFOS). Akin to the methylene blue active substances (MBAS), liquid-phase extraction (LPE) is employed to extract the hydrophobic ion-pair of dye (ethyl violet)-AS to an organic phase (ethyl acetate). The colour (RGB) of the organic phase is read using a smartphone camera with the help of a reading kit. The value of RGB is carefully corrected and linked to the concentration of ASs with a standard deviation of <10% in the 10-1000 ppb (part per billion) range...
October 10, 2017: Chemosphere
https://www.readbyqxmd.com/read/29049958/sublethal-exposure-to-deltamethrin-reduces-the-abilities-of-giant-water-bugs-to-prey-upon-aedes-aegypti-larvae
#10
Wilson R Valbon, Franciele M Cruz, Gabryele S Ramos, Hudson V V Tomé, Eugênio E Oliveira
Freshwater ecosystems provide environmental conditions for many arthropod species, including pests like mosquitoes and beneficial insects. Giant water bugs, Belostoma anurum (Hemiptera: Belostomatidae), are aquatic insects that provide biological control of mosquitoes and small vertebrates in freshwater environments. However, the application of insecticides aiming to control mosquitoes can lead to insecticide exposures of aquatic predators that can result in their death or significant reductions in their behavioral abilities...
October 10, 2017: Chemosphere
https://www.readbyqxmd.com/read/29049944/bioaccumulation-and-effects-of-novel-chlorinated-polyfluorinated-ether-sulfonate-in-freshwater-alga-scenedesmus-obliquus
#11
Wei Liu, Jingwen Li, Lichen Gao, Zhou Zhang, Jing Zhao, Xin He, Xin Zhang
Chlorinated polyfluorinated ether sulfonate (Cl-PFESA) is a novel alternative compound for perfluorooctane sulfonate (PFOS), with its environmental risk not well known. The bioaccumulation and toxic effects of Cl-PFESA in the freshwater alga is crucial for the understanding of its potential hazards to the aquatic environment. Scenedesmus obliquus was exposed to Cl-PFESA at ng L(-1) to mg L(-1), with the exposure regime beginning at the environmentally relevant level. The total log BAF of Cl-PFESA in S. obliquus was 4...
October 16, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/29049941/induced-structural-changes-of-humic-acid-by-exposure-of-polystyrene-microplastics-a-spectroscopic-insight
#12
Wei Chen, Zhen-Yu Ouyang, Chen Qian, Han-Qing Yu
The occurrence of microplastics (MPs) as emerging contaminants in the environment may cause changes in water or sediment characteristics, and further affect their biogeochemical cycles. Thus, insights into the interactions between dissolved organic matter (DOM) and MPs are essential for the assessment of environmental impacts of MPs in ecosystems. Integrating spectroscopic methods with chemometric analyses, this work explored the chemical and microstructural changes of DOM-MP complex to reveal the mechanism of DOM-MP interaction at a molecular level...
October 16, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/29049939/water-assessment-using-ultra-weak-bioluminescence
#13
A C Cordeiro, J L Fabris, G H Couto, H J Kalinowski, E Bertogna
In this paper a method to evaluate the presence of microorganisms of the coliform group in water samples using the ultra-weak bioluminescence (UWB) is proposed. A series of UWB measurements and optical density measurements from cultures of both a set of standard E. coli strain samples, and a set of water samples from a river near Curitiba City in Brazil were performed. All samples were previously incubated at 37°C for 11h in nutritive medium before the temporal UWB emission profiles data were acquired for a period of 24h inside a dark chamber of an especially implemented instrumentation capable of doing photon counting measurements...
October 10, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/29049926/afm-detected-apoptosis-of-hepatocellular-carcinoma-cells-induced-by-american-ginseng-root-water-extract
#14
Yingmin Qu, Zuobin Wang, Feihu Zhao, Jinyun Liu, Wenxiao Zhang, Jingmei Li, Zhengxun Song, Hongmei Xu
American ginseng as a common and traditional herbal medicine has been used in cancer treatment for many years. However, the effect of American ginseng on the cancer cell response (i.e. apoptosis) has not been fully understood yet. Previous studies demonstrated that cellular apoptosis was associated with the changes of mechanical and morphological properties. Therefore, in this study, mechanical and morphological characterizations were carried out by both atomic force microscope (AFM) and inverted optical microscope to investigate the apoptosis of hepatocellular carcinoma (SMMC-7721) cells affected by American ginseng root water extract (AGRWE)...
October 12, 2017: Micron: the International Research and Review Journal for Microscopy
https://www.readbyqxmd.com/read/29049923/attenuation-of-heat-stress-induced-spermatogenesis-complications-by-betaine-in-mice
#15
Somayeh Shadmehr, Seyed Reza Fatemi Tabatabaei, Shima Hosseinifar, Mohammad Reza Tabandeh, Alireza Amiri
High temperatures can induce oxidative stress, impairment of spermatogenesis, and reduction of sperm quality and quantity concomitant with transient periods of partial or complete infertility in male mammals. Promising beneficial effects of betaine supplementation on the epididymal spermatozoa have been reported in experimental studies; however, its effects on testicular heat stress (HS)-induced impairment have yet to be determined. In the present study, betaine (Bet) was orally administrated (250 mg/kg day) during a 14-day period, before (Bet + HS group) or after (HS + Bet group) induction of testicular HS in 7-9 week-old male mice...
October 7, 2017: Theriogenology
https://www.readbyqxmd.com/read/29049912/globular-chitosan-treatment-of-bovine-jugular-veins-evidence-of-anticalcification-efficacy-in-the-subcutaneous-rat-model
#16
Anna A Krasilnikova, David S Sergeevichev, Vladislav V Fomenko, Alexander A Korobeynikov, Maria B Vasilyeva, Alexander S Yunoshev, Alexander M Karaskov, Evgeny A Pokushalov
Vascular xenografts are widely used in cardiovascular surgery as an alternative to autologous vessels and vascular allografts. Calcification is one of the main drawbacks of vascular grafts, especially among young patients and children. Among different anticalcification approaches, chitosan emerges as a highly promising candidate due to its versatility, natural origin, and biocompatibility. We investigated the anticalcification efficacy of globular chitosan ("Chitozol") as it demonstrated the improved rate of water solubility as compared with conventional linear macromolecules of chitosan...
September 14, 2017: Cardiovascular Pathology: the Official Journal of the Society for Cardiovascular Pathology
https://www.readbyqxmd.com/read/29049883/rotational-spectroscopy-of-p-toluic-acid-and-its-1-1-complex-with-water
#17
Elijah G Schnitzler, Nathan A Seifert, Ignes Kusuma, Wolfgang Jaeger
The structure and internal dynamics of p-toluic acid and its 1:1 complex with water were investigated in the gas phase using chirped-pulse and cavity-based Fourier transform microwave spectroscopy. One conformer and one isomer were identified for the monomer and monohydrate, respectively. In the monohydrate, water acts as both a hydrogen bond donor and acceptor, participating in a six-membered intermolecular ring with the carboxyl group. Both a- and b-type transitions were observed for the monomer; only a-type transitions were observed for the monohydrate...
October 19, 2017: Journal of Physical Chemistry. A
https://www.readbyqxmd.com/read/29049867/ion-pair-and-solvation-dynamics-of-bmim-bf4-water-system
#18
João Cascão, Wagner Silva, Ana S D Ferreira, Eurico J Cabrita
In this work, [Bmim][BF4 ]/water mixtures were analysed over the whole water composition (xw ) in order to study the rotational and translational behaviour of the ions. We employed a multinuclear NMR approach to determine anion/cation/water diffusion coefficients and longitudinal relaxation rates at different water content. In neat IL the cation diffuses faster than the anion and at low xw anions and cations share almost the same diffusion coefficient, but above a critical water concentration the anion begins to diffuse faster than the cation...
October 19, 2017: Magnetic Resonance in Chemistry: MRC
https://www.readbyqxmd.com/read/29049844/flavonoids-inhibit-chronically-exposed-arsenic-induced-proliferation-and-malignant-transformation-of-hacat-cells
#19
Mohit Rajput, Praveen Kumar Kujur, Abhijeet Mishra, Rana P Singh
BACKGROUND: Apart from exposure to UV-radiation, studies show relationship between skin cancer and chronic ingestion of arsenic through drinking water. Chemopreventive strategies could help in reducing the toxic effects of arsenic and arsenic-induced skin cancer. METHODS: Cytotoxicity of arsenic on human skin keratinocytes HaCaT cells was evaluated using MTT and trypan blue assays. Arsenic-induced malignant transformant HaCaT cells were selected through soft agar colony assay...
October 19, 2017: Photodermatology, Photoimmunology & Photomedicine
https://www.readbyqxmd.com/read/29049842/acid-digestion-on-river-influenced-shelf-sediment-organic-matter-carbon-and-nitrogen-contents-and-isotopic-ratios
#20
Pasquier Virgil, Sans Jofre Pierre, Lebeau Oanez, Liorzou Celine, Rabineau Marina
RATIONALE: Natural stable isotopes ratios (d(13) Corg and (15) N vales) and associated elemental concentrations (i.e. total organic carbon and total nitrogen contents) preserved in marine sediments are frequently used for the determination of paleoenvironmental processes such as the origin of organic matter. Previous studies highlighted biases in the determination of such geochemical proxies due to pre-analysis acid treatment methods. This study is the first systematic comparison of the effect of acid treatment methods on bulk organic matter using a unique sedimentary system, under two contrasting climatic contexts (i...
October 19, 2017: Rapid Communications in Mass Spectrometry: RCM
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