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https://www.readbyqxmd.com/read/28441624/various-soil-amendments-and-environmental-wastes-affect-the-im-mobilization-and-phytoavailability-of-potentially-toxic-elements-in-a-sewage-effluent-irrigated-sandy-soil
#1
Sabry M Shaheen, Mohamed S Shams, Mohamed R Khalifa, Mohamed A El-Dali, Jörg Rinklebe
Contamination of long-term sewage effluent irrigated soils by potentially toxic elements (PTEs) is a serious concern due to its high environmental and health risk. Our scientific hypothesis is that soil amendments can cause contradictory effects on the element mobilization and phytoavailability depending on the type of element and amendment. Therefore, we aimed to assess the impact of the application (1%) of several low cost amendments and environmental wastes on the (im)mobilization, availability, and uptake of Al, Cd, Cr, Cu, Fe, Mn, Ni, and Zn by sorghum (Sorghum bicolor) in a long term sewage effluent irrigated sandy soils collected from Egypt...
April 22, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28441596/individual-variation-of-persistent-organic-pollutants-in-relation-to-stable-isotope-ratios-sex-reproductive-phase-and-oxidative-status-in-scopoli-s-shearwaters-calonectris-diomedea-from-the-southern-mediterranean
#2
David Costantini, Manrico Sebastiano, Martina S Müller, Igor Eulaers, Per Ambus, Govindan Malarvannan, Adrian Covaci, Bruno Massa, Giacomo Dell'Omo
Little is known about the accumulation of persistent organic pollutants (POPs) and its consequences for seabirds in the Mediterranean basin. We characterised the plasma contaminant profile (polychlorinated biphenyls ΣPCBs; organochlorine pesticides ΣOCPs; polybrominated diphenyl ethers ΣPBDEs) of a population of the seabird Scopoli's shearwater (Calonectris diomedea) that breeds in the southern Mediterranean (Linosa Island) and investigated (i) whether sex, stable isotope ratios (related to diet), reproductive phase (early incubation vs...
April 22, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28441576/fate-and-redistribution-of-perfluoroalkyl-acids-through-afff-impacted-groundwater
#3
Jennifer Bräunig, Christine Baduel, Amy Heffernan, Anna Rotander, Eric Donaldson, Jochen F Mueller
Leaching of perfluoroalkyl acids (PFAAs) from a local point source, a fire-fighting training area, has led to extensive contamination of a groundwater aquifer which has spread underneath part of a nearby town, Oakey, situated in the State of Queensland, Australia. Groundwater is extracted by residents from privately owned wells for daily activities such as watering livestock and garden beds. The concentration of 10 PFAAs in environmental and biological samples (water, soil, grass, chicken egg yolk, serum of horses, cattle and sheep), as well as human serum was investigated to determine the extent of contamination in the town and discuss fate and redistribution of PFAAs...
April 22, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28441332/pregnant-sheep-in-a-farm-environment-did-not-develop-anaemia
#4
Gabrielle C Musk, Amanda James, Matthew W Kemp, Sara Ritchie, Andrew Ritchie, Michael Laurence
The aim of this study was to document the haematological profile of pregnant ewes throughout gestation. Sheep were divided into three groups (n = 8 per group): non-pregnant, singleton, or twin pregnancy. Blood samples were collected every 14 days from day 55 of gestation for haemoglobin concentration; packed cell volume; total protein; and albumin concentration. On days 55 and 125 of gestation blood was collected for trace element estimation: soluble copper and zinc; glutathione peroxidase (GSHPx); and methylmalonic acid (MMA)...
April 25, 2017: Animals: An Open Access Journal From MDPI
https://www.readbyqxmd.com/read/28440626/alteration-of-diastereoisomeric-and-enantiomeric-profiles-of-hexabromocyclododecanes-hbcds-in-adult-chicken-tissues-eggs-and-hatchling-chickens
#5
Xiaobo Zheng, Lin Qiao, Run-XIa Sun, Xiaojun Luo, Jing Zheng, Qilai Xie, Yuxin Sun, Bi Xian Mai
The concentrations and enantiomer fractions (EFs) of α-, β-, and γ-hexabromocyclododecanes (HBCDs) were measured in chicken diet sources (soil and chicken feed), home-raised adult chicken (Gallus domesticus) tissues, eggs during incubation, and hatchling chicken tissues. HBCD concentrations were nd-0.69 ng/g dry weight (dw) and 25.6-48.4 ng/g dw in chicken feed and soil, respectively. HBCDs were detected in all adult chicken tissues except the brain, at median levels of 13.1-44.0 ng/g lipid weight (lw). The proportions of α-HBCD in total HBCDs increased from 51% in soil to more than 87% in adult chicken tissues...
April 25, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28440300/insecticide-induced-leg-loss-does-not-eliminate-biting-and-reproduction-in-anopheles-gambiae-mosquitoes
#6
Alison T Isaacs, Amy Lynd, Martin J Donnelly
Recent successes in malaria control have been largely attributable to the deployment of insecticide-based vector control tools such as bed nets and indoor residual spraying. Pyrethroid-treated bed nets are acutely neurotoxic to mosquitoes, inducing symptoms such as loss of coordination, paralysis, and violent spasms. One result of pyrethroid exposure often seen in laboratory tests is mosquito leg loss, a condition that has thus far been assumed to equate to mortality, as females are not expected to blood feed...
April 25, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28439681/side-effects-of-pesticides-used-in-irrigated-rice-areas-on-telenomus-podisi-ashmead-hymenoptera-platygastridae
#7
Juliano de Bastos Pazini, Rafael Antonio Pasini, Enio Júnior Seidel, Matheus Rakes, José Francisco da Silva Martins, Anderson Dionei Grützmacher
Telenomus podisi Ashmead (Hymenoptera: Platygastridae) is an important agent for the biological control of stink bug eggs in irrigated rice areas and the best strategy for its preservation is the use of selective pesticides. The aim of this study was to know the side-effects of pesticides used in Brazilian irrigated rice areas on egg parasitoid T. podisi. We evaluated, under laboratory conditions, 13 insecticides, 11 fungicides, 11 herbicides, and a control (distilled water) in choice and no-choice tests. In the no-choice tests, the pesticides were sprayed at pre and post-parasitism stages (egg and larval stages of T...
April 24, 2017: Ecotoxicology
https://www.readbyqxmd.com/read/28439025/endocrine-network-essential-for-reproductive-success-in-drosophila-melanogaster
#8
Matthew Meiselman, Sang Soo Lee, Raymond-Tan Tran, Hongjiu Dai, Yike Ding, Crisalejandra Rivera-Perez, Thilini P Wijesekera, Brigitte Dauwalder, Fernando Gabriel Noriega, Michael E Adams
Ecdysis-triggering hormone (ETH) was originally discovered and characterized as a molt termination signal in insects through its regulation of the ecdysis sequence. Here we report that ETH persists in adult Drosophila melanogaster, where it functions as an obligatory allatotropin to promote juvenile hormone (JH) production and reproduction. ETH signaling deficits lead to sharply reduced JH levels and consequent reductions of ovary size, egg production, and yolk deposition in mature oocytes. Expression of ETH and ETH receptor genes is in turn dependent on ecdysone (20E)...
April 24, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28438562/first-successful-vitrification-of-salmonid-ovarian-tissue
#9
Jelena Lujić, Zoran Marinović, Simona Sušnik Bajec, Ida Djurdjevič, Eszter Kása, Béla Urbányi, Ákos Horváth
Due to a lack of cryopreservation protocols for fish eggs and embryos, alternative techniques which will enable storage of female genetic resources are crucial for future development of reproduction management in conservation biology and aquaculture. Experiments were conducted to develop an optimal vitrification protocol for cryopreservation of brown trout Salmo trutta juvenile ovarian tissue. Needle immersed vitrification (NIV) method was used where ovaries were pinned on an acupuncture needle, passaged through equilibration and vitrification solutions containing different combinations and concentrations of methanol (MeOH), propylene glycol (PG) and dimethyl sulfoxide (Me2SO) and subsequently plunged into liquid nitrogen...
April 21, 2017: Cryobiology
https://www.readbyqxmd.com/read/28438225/meta-analysis-of-the-parasitic-phase-traits-of-haemonchus-contortus-infection-in-sheep
#10
Mathilde Saccareau, Guillaume Sallé, Christèle Robert-Granié, Tom Duchemin, Philippe Jacquiet, Alexandra Blanchard, Jacques Cabaret, Carole R Moreno
BACKGROUND: The parasitic nematode Haemonchus contortus shows highly variable life history traits. This highlights the need to have an average estimate and a quantification of the variation around it to calibrate epidemiological models. METHODS: This paper aimed to quantify the main life history traits of H. contortus and to identify explanatory factors affecting these traits using a powerful method based on a systematic review and meta-analysis of current literature...
April 24, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28437885/sesquiterpenes-evaluation-on-schistosoma-mansoni-survival-excretory-system-and-membrane-integrity
#11
Rosimeire Nunes de Oliveira, Karina Rodrigues Dos Santos, Tiago Manuel Fernandes Mendes, Vera Lúcia Garcia, Adriana Silva Santos Oliveira, Veronica de Lourdes Sierpe Jeraldo, Silmara Marques Allegretti
The main challenge in schistosomiasis control has been the emergence of drug-resistant parasites. Since the 1970's, praziquantel (PZQ) is the single drug for treatment. This fact highlights the importance to research news chemotherapeutic agents. In the last years, S. mansoni excretory system and tegument have been major targets for drug development. The purpose of this study was to evaluate the effect of sesquiterpenes, alpha-humulene and trans-caryophyllene on S. mansoni survival, excretory system and membrane integrity, after in vitro exposure...
April 19, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28437474/improvement-of-a-tissue-maceration-technique-for-the-determination-of-placental-involvement-in-schistosomiasis
#12
Martha Charlotte Holtfreter, Heinrich Neubauer, Tanja Groten, Hosny El-Adawy, Jana Pastuschek, Joachim Richter, Dieter Häussinger, Mathias Wilhelm Pletz, Benjamin Thomas Schleenvoigt
Schistosomiasis in pregnancy may cause low birth weight, prematurity and stillbirth of the offspring. The placenta of pregnant women might be involved when schistosome ova are trapped in placental tissue. Standard histopathological methods only allow the examination of a limited amount of placental tissue and are therefore not sufficiently sensitive. Thus, placental schistosomiasis remains underdiagnosed and its role in contributing to schistosomiasis-associated pregnancy outcomes remains unclear. Here we investigated an advanced maceration method in order to recover a maximum number of schistosome ova from the placenta...
April 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28437165/survey-for-listeria-monocytogenes-in-and-on-ready-to-eat-foods-from-retail-establishments-in-the-united-states-2010-through-2013-assessing-potential-changes-of-pathogen-prevalence-and-levels-in-a-decade
#13
John B Luchansky, Yuhuan Chen, Anna C S Porto-Fett, Régis Pouillot, Bradley A Shoyer, Rachel Johnson-DeRycke, Denise R Eblen, Karin Hoelzer, William K Shaw, Jane M van Doren, Michelle Catlin, Jeehyun Lee, Rohan Tikekar, Daniel Gallagher, James A Lindsay, Sherri Dennis
A multiyear interagency Listeria monocytogenes Market Basket Survey was undertaken for selected refrigerated ready-to-eat foods purchased at retail in four FoodNet sites in the United States. Food samples from 16 food categories in six broad groups (seafood, produce, dairy, meat, eggs, and combination foods) were collected weekly at large national chain supermarkets and independent grocery stores in California, Maryland, Connecticut, and Georgia for 100 weeks between December 2010 and March 2013. Of the 27,389 total samples, 116 samples tested positive by the BAX PCR system for L...
April 24, 2017: Journal of Food Protection
https://www.readbyqxmd.com/read/28435385/a-new-species-of-poropoea-foerster-from-africa-hymenoptera-chalcidoidea-trichogrammatidae
#14
Stefania Laudonia, Gennaro Viggiani, Silvano Biondi
A new species of Poropoea Foerster (Hymenoptera, Chalcidoidea, Trichogrammatidae) was obtained from eggs of attelabid beetles (Coleoptera: Attelabidae) associated with Combretum sp. (Myrtales, Combretaceae). This species is described from Ogooué-Ivindo province in north-eastern Gabon. The new species is easily distinguished from the known members of the genus Poropoea by the following combination of characters: female antennal club unsegmented, premarginal vein of the fore wing with a nodular premarginal vein and the stigma of the stigmal vein black, the wing lacks the RS1 track; front and hind legs more robust than the middle leg and with coxa and femur markedly enlarged, and ovipositor exserted to one-third of the gaster length...
2017: ZooKeys
https://www.readbyqxmd.com/read/28435301/egg-introduction-differential-allergic-responses
#15
Amrita Dosanjh
The use of egg protein preparations in clinical trials to reduce the incidence of egg allergy among infants includes a number of preparations of egg. These include whole egg, egg white protein, and egg yolk preparations. The study of the differential immune responses to these allergenic proteins in comparison is suggested as a future research area of investigation.
2017: Journal of Asthma and Allergy
https://www.readbyqxmd.com/read/28435265/toxicity-studies-of-six-types-of-carbon-nanoparticles-in-a-chicken-embryo-model
#16
Natalia Kurantowicz, Ewa Sawosz, Gabriela Halik, Barbara Strojny, Anna Hotowy, Marta Grodzik, Radosław Piast, Wanvimol Pasanphan, André Chwalibog
In the present study, the toxicity of six different types of carbon nanoparticles (CNPs) was investigated using a chicken-embryo model. Fertilized chicken eggs were divided into the following treatment groups: placebo, diamond NPs, graphite NPs, pristine graphene, small graphene oxide, large graphene oxide, and reduced graphene oxide. Experimental solutions at a concentration of 500 μg/mL were administrated into the egg albumin. Gross pathology and the rate of survival were examined after 5, 10, 15, and 20 days of incubation...
2017: International Journal of Nanomedicine
https://www.readbyqxmd.com/read/28435197/development-of-nested-polymerase-chain-reaction-based-diagnosis-of-duck-enteritis-virus-and-detection-of-dna-polymerase-gene-from-non-descriptive-duck-breeds-of-west-bengal-india
#17
Partha Sarathi Mandal, Sunit Kumar Mukhopadhayay, Saktipada Pradhan, Samiran Mondal, Chandrakanta Jana, Nimai Chandra Patra, Rabindra Nath Hansda
AIM: The study was undertaken to detect the clinical signs, postmortem lesions of embryonated duck plague (DP) infected eggs, and histopathological changes of chorioallantoic membrane (CAM) in non-descriptive ducks of West Bengal with special reference to standardize nested polymerase chain reaction (PCR). MATERIALS AND METHODS: After postmortem of suspected carcasses, samples were collected for virus isolation and identification through specific pathogen free (Khaki Campbell) embryonated duck eggs...
March 2017: Veterinary World
https://www.readbyqxmd.com/read/28435194/molecular-characterization-of-velogenic-viscerotropic-ranikhet-newcastle-disease-virus-from-different-outbreaks-in-desi-chickens
#18
V S Dhaygude, G K Sawale, M M Chawak, N R Bulbule, S D Moregaonkar, D S Gavhane
AIM: Diagnosis of velogenic viscerotropic Ranikhet disease from six different flocks of desi chicken in and around Mumbai by gross and histopathological examination, isolation of virus and molecular methods. MATERIALS AND METHODS: A total of 25 carcasses (varying between 2 and 6 carcasses from each flock) of six different flocks of adult desi chicken were subjected to necropsy examination for diagnosis of the disease during the span of a year (2014-2015). After thorough gross examination, the tissue samples were collected and processed for virus isolation and histopathological examination...
March 2017: Veterinary World
https://www.readbyqxmd.com/read/28435029/activity-of-carboxylesterases-glutathione-s-transferase-and-monooxygenase-on-rhipicephalus-microplus-exposed-to-fluazuron
#19
Fabrício Nascimento Gaudêncio, Guilherme Marcondes Klafke, Vinícius Menezes Tunholi-Alves, Thaís Paes Ferreira, Cristiane Nunes Coelho, Adivaldo Henrique da Fonseca, Isabele da Costa Angelo, Jairo Pinheiro
The objective of this study was to assess the effect of the exposure to fluazuron on the activity of common pesticide detoxification enzyme groups in the cattle tick (Rhipicephalus microplus). Engorged females of a susceptible strain (POA) and a resistant strain (Jaguar) were exposed in vitro to fluazuron and their eggs and larvae were used to compare the activities of the general esterases, mixed-function oxidases (MFO) and glutathione-S-transferase (GST). The results showed significant elevation in MFO contents and esterases activity in the resistant strain when compared with the susceptible strain, in eggs and larvae respectively...
April 20, 2017: Parasitology International
https://www.readbyqxmd.com/read/28433931/alkaline-earth-elements-of-scalp-hair-and-presence-of-hypertension-in-housewives-a-perspective-of-chronic-effect
#20
Bin Wang, Lailai Yan, Ying Sun, Jingjing Yan, Qun Lu, Jingxu Zhang, Zhiwen Li
The relationship between population intakes of alkaline-earth elements (AEEs) and hypertension risk remains under discussion. Hair AEE concentrations can indicate their intake levels into human body. Thus, we aimed to investigate an association of hair AEE concentrations with hypertension risk, and the potential effect of dietary habit on this association. We recruited 398 housewives [163 subjects with hypertension (case group) and 235 subjects without hypertension (control group)] in Shanxi Province of north China...
April 6, 2017: Chemosphere
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