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https://www.readbyqxmd.com/read/29040942/effects-of-different-factors-on-photodefluorination-of-perfluorinated-compounds-by-hydrated-electrons-in-organo-montmorillonite-system
#1
Haoting Tian, Cheng Gu
Perfluorinated compounds (PFCs) are considered as the most recalcitrant organic contaminants. Our previous research has shown that PFCs can be completely defluorinated in the UV/organoclay/3-indole acetic acid system, however, the factors that could affect the degradation of PFCs, are still not clear. In this study, we further investigated the effect of different indole derivatives and organo-modified montmorillonite on the degradation of perfluooctanoic acid (PFOA). Based on multiple linear regression analysis, our results clearly indicate that hydrated electron yields of indole derivatives, adsorption of PFOA and indole derivatives on organo-montmorillonite contributed independently to the degradation of PFOA...
October 13, 2017: Chemosphere
https://www.readbyqxmd.com/read/29040877/corpus-luteum-dynamics-after-ovulation-induction-with-or-without-previous-exposure-to-progesterone-in-prepubertal-nellore-heifers
#2
Dayane Priscila Vrisman, Natália Marins Bastos, Guilherme Fazan Rossi, Naiara Nantes Rodrigues, Luisa Pucci Bueno Borges, Augusto Ryonosuke Taira, Cláudia Cristina Paro de Paz, Guilherme de Paula Nogueira, Pedro Paulo Maia Teixeira, Fábio Morato Monteiro, Maria Emília Franco Oliveira
The objectives of this study were 1) to monitor corpus luteum (CL) dynamics after two different protocols of ovulation induction in prepubertal Nellore heifers, and 2) to determine differences in luteal function. Fifty-seven heifers (weight 289.61 ± 32.28 kg, BCS 5.66 ± 0.65, age 17.47 ± 0.81 months) were divided into two groups: GP4+GnRH received a progesterone (P4) device of 3rd use for 10 days, followed by the administration of 0.02 mg buserelin acetate (GnRH) 48 h after removal of the device, and GGnRH received only GnRH...
October 13, 2017: Theriogenology
https://www.readbyqxmd.com/read/29040654/does-background-odor-in-tea-gardens-mask-attractants-screening-and-application-of-attractants-for-empoasca-onukii-matsuda
#3
Xiuxiu Xu, Xiaoming Cai, Lei Bian, Zongxiu Luo, Zhaoqun Li, Zongmao Chen
Plant volatiles help herbivores to locate their hosts, and therefore, they could be used to help develop pesticide-free pest management strategies. To develop an attractant for tea leafhopper (Empoasca onukii), we screened nine tea plant volatile compounds for their attractiveness using Y-tube olfactometer assays. Results indicated that tea leafhoppers significantly preferred ocimene, limonene, (Z)-3-hexenol, and (Z)-3-hexenyl acetate over clean air. These compounds were combined in a blend which lost its attractiveness at concentrations below 10-2 g/ml in liquid paraffin...
October 11, 2017: Journal of Economic Entomology
https://www.readbyqxmd.com/read/29039921/molecular-cobalt-catalysts-for-o2-reduction-low-overpotential-production-of-h2o2-and-comparison-with-iron-based-catalysts
#4
Yu-Heng Wang, Michael L Pegis, James M Mayer, Shannon S Stahl
A series of mononuclear pseudo-macrocyclic cobalt complexes have been investigated as catalysts for O2 reduction. Each of these complexes, with CoIII/II reduction potentials that span nearly 400 mV, mediate highly selective two-electron reduction of O2 to H2O2 (93-99%) using decamethylferrocene (Fc*) as the reductant and acetic acid as the proton source. Kinetic studies reveal that the rate exhibits a first-order dependence on [Co] and [AcOH], but no dependence on [O2] or [Fc*]. A linear correlation is observed between log(TOF) vs...
October 17, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/29037000/-analysis-of-fipronil-and-metabolites-residues-distrubution-in-eggs
#5
B Lyu, D W Chen, J G Li, S Zhou, Y F Zhao
Objective: To compare the residual distribution of fipronil and its metabolites in white and yellow egg, and to analyze the residual changes of fipronil and its metabolites in raw and cooked samples, regarding the risk assessment of fipronil and its metabolites via consuming egg for different age groups. Methods: The white egg and yellow egg were isolated from 10 egg samples containing fipronil residues. Samples were extracted with acetonitrile and purified, and determined by liquid chromatography-high resolution mass spectrometry...
October 6, 2017: Zhonghua Yu Fang Yi Xue za Zhi [Chinese Journal of Preventive Medicine]
https://www.readbyqxmd.com/read/29036927/chinese-olive-canarium-album-l-fruit-extract-attenuates-metabolic-dysfunction-in-diabetic-rats
#6
Yu-Te Yeh, An-Na Chiang, Shu-Chen Hsieh
Hyperglycemia and dysregulation of lipid metabolism play a crucial role in metabolic dysfunction. The aims of present study were to evaluate the ameliorative effect of the ethyl acetate fraction of Chinese olive fruit extract (CO-EtOAc) on high-fat diet (HFD) and streptozotocin (STZ)-induced diabetic rats. CO-EtOAc, rich in gallic acid and ellagic acid, could markedly decreased the body weight and epididymal adipose mass. In addition, CO-EtOAc increased serum HDL-C levels, hepatic GSH levels, and antioxidant enzyme activities; lowered blood glucose, serum levels of total cholesterol (TC), triglycerides (TG), bile acid, and tumor necrosis factor alpha (TNFα); and reduced TC and TG in liver...
October 15, 2017: Nutrients
https://www.readbyqxmd.com/read/29036770/emergency-contraception-oral-and-intrauterine-options
#7
Kirsten I Black, Safeera Y Hussainy
BACKGROUND: Emergency contraception can be used to prevent pregnancy where contraception has not been used, or there has been contraceptive misuse or failure. Australian women have three options for emergency contraception: two types of oral pills (levonorgestrel [LNG]-containing pill and ulipristal acetate [UPA]) and the copper intrauterine device (IUD). Both pills are available from pharmacies without prescription, whereas the copper IUD requires insertion by a trained provider. OBJECTIVE: The objective of this article is to describe the indications, efficacy and contraindications for use of the three emergency contraceptive methods available in Australia...
October 2017: Australian Family Physician
https://www.readbyqxmd.com/read/29036173/pre-treatment-with-gnrha-or-ulipristal-acetate-prior-to-laparoscopic-and-laparotomic-myomectomy-a-systematic-review-and-meta-analysis
#8
Inge de Milliano, Moniek Twisk, Johannes C Ket, Judith A Huirne, Wouter J Hehenkamp
BACKGROUND: Myomectomy has potential risks of complications. To reduce these risks, medical pre-treatment can be applied to reduce fibroid size and thereby potentially decrease intra-operative blood loss, the need for blood transfusion and emergency hysterectomy. The aim of this systematic review and meta-analysis is to study the effectiveness of medical pre-treatment with Gonadotropin-releasing hormone agonists (GnRHa) or ulipristal acetate prior to laparoscopic or laparotomic myomectomy on intra-operative and post-operative outcomes...
2017: PloS One
https://www.readbyqxmd.com/read/29035783/radiotracer-investigation-on-the-measurement-of-residence-time-distribution-in-an-ethyl-acetate-reactor-system-with-a-large-recycle-ratio
#9
Arghya Datta, Raj Kumar Gupta, Sunil Goswami, Vijay Kumar Sharma, Haripada Bhunia, Damandeep Singh, Harish Jagat Pant
A radiotracer investigation was carried out on the measurement of residence time distribution (RTD) of process fluid in an industrial-scale ethyl acetate reactor system, which consists of two independent reactors with recirculation and connected in series with each other. Bromine-82 as ammonium bromide was used as the radiotracer for the RTD experiments at different operating conditions. The individual reactors and the overall reactor system were modelled using physically representative phenomenological models comprising of continuously stirred tank reactors (CSTRs)...
September 25, 2017: Applied Radiation and Isotopes
https://www.readbyqxmd.com/read/29035728/engineering-pediococcus-acidilactici-with-xylose-assimilation-pathway-for-high-titer-cellulosic-l-lactic-acid-fermentation
#10
Zhongyang Qiu, Qiuqiang Gao, Jie Bao
Xylose-assimilating pathways were constructed in the parental Pediococcus acidilactici strain and evolutionarily adapted to yield a highly stable co-fermentation strain for l-lactic acid production. The phosphoketolase pathway (PK) was blocked for reduction of acetic acid generation by disrupting phosphoketolase (pkt) gene. The pentose phosphate pathway (PPP) was reconstructed for xylose assimilation by integrating four heterologous genes encoding transketolase (tkt), transaldolase (tal), xylose isomerase (xylA) and xylulokinase (xylB) into the P...
September 21, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/29035504/chromophore-catalyst-assembly-for-water-oxidation-prepared-by-atomic-layer-deposition
#11
Leila Alibabaei, Robert J Dillon, Caroline E Reilly, M Kyle Brennaman, Kyung-Ryang Wee, Seth L Marquard, John M Papanikolas, Thomas J Meyer
Visible-light-driven water splitting was investigated in a dye sensitized photoelectrosynthesis cell (DSPEC) based on a photoanode with a phosphonic acid-derivatized donor--acceptor (D--A) organic chromophore, 1, and the water oxidation catalyst [Ru(bda)(4-O(CH2)3P(O3H2)2-pyr)2], 2, (pyr = pyridine; bda = 2,2'-bipyridine-6,6'-dicarboxylate). The photoanode was prepared by using a layering strategy beginning with the organic dye anchored to an FTO|core/shell electrode, atomic layer deposition (ALD) of a thin layer (< 1 nm) of TiO2, and catalyst binding through phosphonate linkage to the TiO2 layer...
October 16, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29035335/selectivity-enhancement-in-electronic-nose-based-on-an-optimized-dqn
#12
Yu Wang, Jianguo Xing, Shu Qian
In order to enhance the selectivity of metal oxide gas sensors, we use a flow modulation method to exploit transient sensor information. The method is based on modulating the flow of the carrier gas that brings the species to be measured into the sensor chamber. We present an active perception strategy by using a DQN which can optimize the flow modulation online. The advantage of DQN is not only that the classification accuracy is higher than traditional methods such as PCA, but also that it has a good adaptability under small samples and labeled data...
October 16, 2017: Sensors
https://www.readbyqxmd.com/read/29035055/atmospheric-simulation-chamber-studies-of-the-gas-phase-photolysis-of-pyruvic-acid
#13
Allison Early Reed Harris, Mathieu Cazaunau, Aline Gratien, Edouard Pangui, Jean-Francois Doussin, Veronica Vaida
Pyruvic acid is an atmospherically-abundant α-keto-acid that degrades efficiently from the troposphere via gas-phase photolysis. In order to explore conditions relevant to the environment, 2-12 ppm pyruvic acid is irradiated by a solar simulator in the environmental simulation chamber, CESAM. The combination of the long path length available in the chamber and its low surface area to volume ratio allow us to quantitatively examine the quantum yield and photochemical products of pyruvic acid. Such details are new to the literature for the low initial concentrations of pyruvic acid employed here...
October 16, 2017: Journal of Physical Chemistry. A
https://www.readbyqxmd.com/read/29035047/electrocatalytic-water-oxidation-by-a-water-soluble-copper-ii-complex-with-a-copper-bound-carbonate-group-acting-as-a-potential-proton-shuttle
#14
Fangfang Chen, Ni Wang, Haitao Lei, Dingyi Guo, Hongfei Liu, Zongyao Zhang, Wei Zhang, Wenzhen Lai, Rui Cao
Water-soluble copper(II) complexes of the dianionic tridentate pincer ligand N,N'-2,6-dimethylphenyl-2,6-pyridinedicarboxamidate (L) are catalysts for water oxidation. In [L-Cu(II)-DMF] (1, DMF = dimethylformamide) and [L-Cu(II)-OAc](-) (2, OAc = acetate), ligand L binds Cu(II) through three N atoms, which define an equatorial plane. The fourth coordination site of the equatorial plane is occupied by DMF in 1 and by OAc(-) in 2. These two complexes can electrocatalyze water oxidation to evolve O2 in 0.1 M pH 10 carbonate buffer...
October 16, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/29034952/viscum-articulatum-burm-f-a-review-on-its-phytochemistry-pharmacology-and-traditional-uses
#15
REVIEW
Bhishma P Patel, Pawan K Singh
OBJECTIVES: The aim of this study was to review and highlight traditional and ethnobotanical uses, phytochemical constituents, IP status, biological activity and pharmacological activity of Viscum articulatum. METHODS: Thorough literature searches were performed on Viscum articulatum, and data were analysed for reported traditional uses, pharmacological activity, phytochemicals present and patents filed. Scientific and patent databases such as PubMed, Science Direct, Google Scholar, Google patents, USPTO and Espacenet were searched using different keywords...
October 16, 2017: Journal of Pharmacy and Pharmacology
https://www.readbyqxmd.com/read/29034741/anti-inflammatory-effect-of-methanolic-extract-of-gmelina-arborea-bark-and-its-fractions-against-carrageenan-induced-paw-oedema-in-rats
#16
Sarabjit Kaur, Preet Mohinder Singh Bedi, Navreet Kaur
Gmelina arborea has been traditionally used for treatment of abdominal pain, burning sensation and as stomachic. The anti-inflammatory effect of aqueous and methanol extract of this plant has been studied but detailed investigations on anti-inflammatory activity of G. arborea stem bark are still not available. Therefore, the present study was designed to evaluate the anti-inflammatory activity of methanol extract and its fractions using carrageenan induced paw oedema model. Methanol extract at the dose of 500 mg/kg and its ethyl acetate fraction at 50 mg/kg showed significant reduction in paw oedema in comparison with standard drug...
October 16, 2017: Natural Product Research
https://www.readbyqxmd.com/read/29034737/anti-allergic-inflammatory-effect-of-vanillic-acid-through-regulating-thymic-stromal-lymphopoietin-secretion-from-activated-mast-cells
#17
Hyun-Ja Jeong, Sun-Young Nam, Hee-Yun Kim, Mu Hyun Jin, Mi Hye Kim, Seok Seon Roh, Hyung-Min Kim
Vanillic acid, which is well known as a benzoic acid derivative, has been used as a flavouring agent. Currently, we ascertained the therapeutic potential action of vanillic acid on allergic inflammatory reaction in human mast cell line, HMC-1. Treatment with vanillic acid resulted in a significant decrease in levels of thymic stromal lymphopoietin and pro-inflammatory cytokines compared to phorbol 12-myristate 13-acetate and calcium ionophore A23187 (PMACI)-treated HMC-1 cells. In PMACI-stimulated cells, treatment with vanillic acid also dramatically inhibited activities of caspase-1 and nuclear factor-kB (p65)...
October 16, 2017: Natural Product Research
https://www.readbyqxmd.com/read/29034204/studies-on-analgesic-anti-inflammatory-activities-of-stem-and-roots-of-inula-cuspidata-c-b-clarke
#18
Sarvesh Kumar Paliwal, Bhawana Sati, Samriti Faujdar, Swapnil Sharma
The present study was carried out to evaluate analgesic and anti-inflammatory activities in Inula cuspidata stem and root extracts along with heavy metals estimation in stem and root powder. Stem and roots were extracted with chloroform (ICSCE, ICRCE) and methanol (ICSME, ICRME). Acute oral toxicity of all extracts was determined by OECD guidelines 425. Analgesic activity was investigated by using hot plate and acetic acid induced writhing models. Anti-inflammatory activity (acute) of all extracts was evaluated by carrageenan induced paw edema model...
October 2017: Journal of Traditional and Complementary Medicine
https://www.readbyqxmd.com/read/29034196/protective-effect-of-ethyl-acetate-fraction-of-biophytum-sensitivum-extract-against-sodium-oxalate-induced-urolithiasis-in-rats
#19
Anil T Pawar, Niraj S Vyawahare
The methanolic whole plant extract of Biophytum sensitivum (gǎnyìng cǎo) has been found to possess antiurolithiatic effect. The present study was undertaken to evaluate the antiurolithiatic effect of some fractions of methanolic whole plant extract of B. sensitivum (MBS) in rats as a step toward activity-directed isolation of antiurolithiatic component. The MBS was successively extracted with dichloromethane, ethyl acetate, ethanol and water to obtain fractions. Sodium oxalate (70 mg/kg, i.p.) was administered to rats for seven days to develop calcium oxalate urolithiasis...
October 2017: Journal of Traditional and Complementary Medicine
https://www.readbyqxmd.com/read/29034192/evaluation-of-analgesic-and-anti-inflammatory-activity-of-bridelia-retusa-spreng-bark
#20
Anil U Tatiya, Ajay K Saluja, Mohan G Kalaskar, Sanjay J Surana, Prakash H Patil
Several species of Bridelia have been used in the condition of pain & arthritis in Indian folk medicine. Present study revealed the preliminary phytochemical investigation and evaluation of analgesic, anti-inflammatory and anti-arthritic activity as well as underlying mechanism of bark of Bridelia retusa Spreng. (Euphorbiaceae). The bark was subjected to extraction using pet.ether, ethyl acetate and acetone. All the extracts were significantly inhibit abdominal writhings response and licking time in late phase of formalin test...
October 2017: Journal of Traditional and Complementary Medicine
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