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https://www.readbyqxmd.com/read/28927130/stereomicroscopic-features-of-colitis-associated-tumors-in-mice-evaluation-of-pit-pattern
#1
Ryosuke Yamauchi, Ken Kominato, Keiichi Mitsuyama, Hidetoshi Takedatsu, Shinichiro Yoshioka, Kotaro Kuwaki, Hiroshi Yamasaki, Shuhei Fukunaga, Atsushi Mori, Jun Akiba, Osamu Tsuruta, Takuji Torimura
Patients with longstanding ulcerative colitis have an increased risk of colorectal cancer. Mouse models for colitis-associated tumors are indispensable for the development of novel strategies for prevention and intervention, as well as an improved understanding of the mechanisms underlying tumor formation. The present study examined whether stereomicroscopic observations with dye-application were able to detect and discriminate tumors in a colitis-associated tumor model in mice. Colonic tumors were induced in C57BL/6 mice by 15 cycles of treatment with dextran sulfate sodium (DSS) in drinking water...
September 2017: Oncology Letters
https://www.readbyqxmd.com/read/28925966/modification-of-13x-molecular-sieve-by-chitosan-for-adsorptive-removal-of-cadmium-from-simulated-wastewater
#2
Yan Shi, Ken Sun, Lixin Huo, Xiuxiu Li, Xuebin Qi, Zhaohui Li
Chitosan was used to modify a 13X molecular sieve to improve its cadmium removal capability. After being modified with 2% chitosan-acetate for 2 h at 30 °C, significant uptake of Cd(2+) could be achieved. The uptake of Cd(2+) on the modified 13X molecular sieve followed the Langmuir isotherms with a capacity of 1 mg/g. The kinetics of Cd(2+) removal by modified 13X molecular sieve followed a pseudo second-order reaction, suggesting chemisorption or surface complexation. The Cd(2+) removal with a sorbent dose of 2 g/L from an initial concentration of 100 μg/L reached more than 95% in 90 min...
September 19, 2017: Materials
https://www.readbyqxmd.com/read/28925591/melinjo-gnetum-gnemon-seed-extract-consumption-during-lactation-improved-vasodilation-and-attenuated-the-development-of-hypertension-in-female-offspring-of-fructose-fed-pregnant-rats
#3
Rachael A Uson-Lopez, Saori Kataoka, Yuuka Mukai, Shin Sato, Masaaki Kurasaki
BACKGROUND: Fructose intake has been correlated with increased prevalence of metabolic disorders including hypertension. In pregnant rats, fructose intake has been reported to have adverse effects on the health of its offspring. This study investigated the effects of gestational maternal fructose consumption and if supplementation with melinjo seed extracts to the maternal diet during lactation could benefit the offspring in later life. METHODS: Pregnant rats were randomly divided into three groups: untreated (CC), fructose-treated (FC), and fructose and melinjo-treated (FM)...
September 19, 2017: Birth defects research
https://www.readbyqxmd.com/read/28924367/genotoxicity-of-a-low-dose-nitrosamine-mixture-as-drinking-water-disinfection-byproducts-in-nih3t3-cells
#4
Hai-Yan Wang, Ming Qin, Lei Dong, Jia-Ying Lv, Xia Wang
N-nitrosamines (NAms), which can arise as byproducts of disinfection agents, are reportedly found in drinking water, and their potential carcinogenicity is a concern; however, little research exists regarding the genotoxicity or carcinogenicity of NAms exposure as a low-dose mixture. The three most common NAms components in China's drinking water are N-nitrosodimethylamine (NDMA), N-nitrosodiethylamine (NDEA) and N-nitrosomethylethylamine (NMEA). Thus, we measured the genotoxic and carcinogenic potential of these compounds and measured the cell cycle and gene expression...
2017: International Journal of Medical Sciences
https://www.readbyqxmd.com/read/28923091/intestinal-parasitic-infections-and-risk-factors-a-cross-sectional-survey-of-some-school-children-in-a-suburb-in-accra-ghana
#5
Akua Obeng Forson, Isaac Arthur, Michael Olu-Taiwo, Kathrine Korkor Glover, Prince Jonathan Pappoe-Ashong, Patrick F Ayeh-Kumi
OBJECTIVE: This study aimed to determine the prevalence and establish some risk factors associated with the acquisition of gastrointestinal parasitic infections in school children in Accra, Ghana. RESULTS: The overall prevalence of intestinal parasitic infection was 15%. Giardia lamblia (10%) and Schistosoma mansoni (1.7%) were the common parasites found. Out of the 15% students postive for intestinal parasites, 13.6% had single parasites and 1.3% had double parasitic infections...
September 18, 2017: BMC Research Notes
https://www.readbyqxmd.com/read/28922262/sugar-in-infants-children-and-adolescents-a-position-paper-of-the-european-society-for-paediatric-gastroenterology-hepatology-and-nutrition-committee-on-nutrition
#6
Nataša Fidler Mis, Christian Braegger, Jiri Bronsky, Cristina Campoy, Magnus Domellöf, Nicholas D Embleton, Iva Hojsak, Jessie Hulst, Flavia Indrio, Alexandre Lapillonne, Walter Mihatsch, Christian Molgaard, Rakesh Vora, Mary Fewtrell
The consumption of sugars, particularly sugar-sweetened beverages (SSBs; beverages or drinks that contain added caloric sweeteners (i.e. sucrose, high-fructose corn syrup, fruit-juice concentrates), in European children and adolescents exceeds current recommendations. This is of concern because there is no nutritional requirement for free sugars, and infants have an innate preference for sweet taste, which may be modified and reinforced by pre- and postnatal exposures. Sugar containing beverages/free sugars increase the risk for overweight/obesity and dental caries, can result in poor nutrient supply and reduced dietary diversity and may be associated with increased risk of type 2 diabetes mellitus, cardiovascular risk, and other health effects...
September 16, 2017: Journal of Pediatric Gastroenterology and Nutrition
https://www.readbyqxmd.com/read/28921690/tissue-specific-and-time-dependent-clonal-expansion-of-enu-induced-mutant-cells-in-gpt-delta-mice
#7
Takafumi Nakayama, Tomoko Sawai, Ikuko Masuda, Shinya Kaneko, Kazumi Yamauchi, Benjamin J Blyth, Yoshiya Shimada, Akira Tachibana, Shizuko Kakinuma
DNA mutations play a crucial role in the origins of cancer, and the clonal expansion of mutant cells is one of the fundamental steps in multistage carcinogenesis. In this study, we correlated tumor incidence in B6C3F1 mice during the period after exposure to N-ethyl-N-nitrosourea (ENU) with the persistence of ENU-induced mutant clones in transgenic gpt delta B6C3F1 mice. The induced gpt mutations afforded no selective advantage in the mouse cells and could be distinguished by a mutational spectrum that is characteristic of ENU treatment...
September 16, 2017: Environmental and Molecular Mutagenesis
https://www.readbyqxmd.com/read/28921575/ingested-nitrate-and-nitrite-disinfection-by-products-and-pancreatic-cancer-risk-in-postmenopausal-women
#8
Arbor J L Quist, Maki Inoue-Choi, Peter J Weyer, Kristin E Anderson, Kenneth P Cantor, Stuart Krasner, Laura E Beane Freeman, Mary H Ward, Rena R Jones
Nitrate and nitrite are precursors of N-nitroso compounds (NOC), probable human carcinogens that cause pancreatic tumors in animals. Disinfection by-products (DBP) exposures have also been linked with digestive system cancers, but few studies have evaluated relationships with pancreatic cancer. We investigated the association of pancreatic cancer with these drinking water contaminants and dietary nitrate/nitrite in a cohort of postmenopausal women in Iowa (1986-2011). We used historical monitoring and treatment data to estimate levels of long-term average nitrate and total trihalomethanes (TTHM; the sum of the most prevalent DBP class) and the duration exceeding one-half the maximum contaminant level (>½ MCL; nitrate-nitrogen 5mg/L, 40µg/L TTHM) among participants on public water supplies (PWS) >10 years...
September 16, 2017: International Journal of Cancer. Journal International du Cancer
https://www.readbyqxmd.com/read/28920758/occurrence-and-source-apportionment-of-polycyclic-aromatic-hydrocarbons-in-soils-and-sediment-from-hanfeng-lake-three-gorges-china
#9
Jing Cai, Shutao Gao, Like Zhu, Xuwei Jia, Xiangying Zeng, Zhiqiang Yu
This study was conducted to investigate the pollutant status and the retention mechanism of polycyclic aromatic hydrocarbons (PAHs) in soils and sediment from bank-water-level-fluctuating zone (WLFZ)-water systems in Hanfeng Lake, Three Gorges, China. The concentrations of the 16 PAHs ranged from 21.8 to 1324 ng g(-1) dry wt for all 20 soil and sediment samples. These concentration levels were remarkably lower than those in soils and sediment collected domestically and worldwide. PAHs with two and three rings were found to be dominant in all the samples, with phenanthrene being most abundant...
September 18, 2017: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/28920151/removal-of-arsenic-iii-and-v-from-laboratory-solutions-and-contaminated-groundwater-by-metallurgical-slag-through-anion-induced-precipitation
#10
Rafael Schouwenaars, Claudia Victoria Montoya-Bautista, Elizabeth Diane Isaacs-Páez, Myriam Solís-López, Rosa María Ramírez-Zamora
Metallurgical slag was used for the simultaneous removal of high concentrations of arsenite and arsenate from laboratory solutions and severely contaminated groundwater. Apart from demonstrating the high efficiency of arsenic removal in presence of competing species, the work aims to explore the physicochemical mechanisms of the process by means of microscopy observation and a detailed statistical analysis of existing kinetic and isotherm equations. Fitting was performed by non-linear least squares using weighted residuals; ANOVA and bootstrap methods were used to compare the models...
September 17, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28919865/coping-with-salt-water-habitats-metabolic-and-oxidative-responses-to-salt-intake-in-the-rufous-collared-sparrow
#11
Pablo Sabat, Cristóbal Narváez, Isaac Peña-Villalobos, Carolina Contreras, Karin Maldonado, Juan C Sanchez-Hernandez, Seth D Newsome, Roberto Nespolo, Francisco Bozinovic
Many physiological adjustments occur in response to salt intake in several marine taxa, which manifest at different scales from changes in the concentration of individual molecules to physical traits of whole organisms. Little is known about the influence of salinity on the distribution, physiological performance, and ecology of passerines; specifically, the impact of drinking water salinity on the oxidative status of birds has been largely ignored. In this study, we evaluated whether experimental variations in the salt intake of a widely-distributed passerine (Zontotrichia capensis) could generate differences in basal (BMR) and maximum metabolic rates (Msum), as well as affect metabolic enzyme activity and oxidative status...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28918635/optimization-of-the-determination-method-for-dissolved-cyanobacterial-toxin-bmaa-in-natural-water
#12
Boyin Yan, Zhiquan Liu, Rui Huang, Yongpeng Xu, Dongmei Liu, Tsair-Fuh Lin, Fuyi Cui
There is a serious dispute on the existence of β-N-methylamino-L-alanine (BMAA) in water, which is a neurotoxin that may cause Amyotrophic lateral sclerosis/Parkinson's disease (ALS/PDC) and Alzheimer' disease. It is believed that a reliable and sensitive analytical method for the determination of BMAA is urgently required to resolve this dispute. In the present study, the solid phase extraction (SPE) procedure and the analytical method for dissolved BMAA in water were investigated and optimized. The results showed both derivatized and underivatized methods were qualified for the measurement of BMAA and its isomer in natural water, and the limit of detection and the precision of the two methods were comparable...
September 17, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28918291/distinguished-cr-vi-capture-with-rapid-and-superior-capability-using-polydopamine-microsphere-behavior-and-mechanism
#13
Qingrui Zhang, Yixuan Li, Qinggang Yang, He Chen, Xinqing Chen, Tifeng Jiao, Qiuming Peng
Toxic heavy metal containing Cr(VI) species is a serious threat for ecological environment and human beings. In this work, a new mussel-inspired polydopamine microsphere (PDA-sphere) is prepared through in situ oxidative polymerization at air condition with controllable sizes. The adsorption of Cr(VI) ions onto PDA-sphere is highly pH dependent with the optimal pH ranging from 2.5 to 3.8. A rapid Cr(VI) removal can approach in 8min for equilibrium. More importantly, the prepared materials exhibit a remarkable sorption selectivity, coexisting SO4(2-), NO3(-) and Cl(-) ions at high levels; The applicability model further proves its effective performances with treated capacity of 42,000kg/kg sorbent, and the effluent can be reduced from 2000ppb to below 50ppb, which meets the drinking water criterions recommended by WHO...
August 26, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28918289/effective-removal-of-trace-thallium-from-surface-water-by-nanosized-manganese-dioxide-enhanced-quartz-sand-filtration
#14
Xiaoliu Huangfu, Chengxue Ma, Jun Ma, Qiang He, Chun Yang, Jian Zhou, Jin Jiang, Yaan Wang
Thallium (Tl) has drawn wide concern due to its high toxicity even at extremely low concentrations, as well as its tendency for significant accumulation in the human body and other organisms. The need to develop effective strategies for trace Tl removal from drinking water is urgent. In this study, the removal of trace Tl (0.5 μg L(-1)) by conventional quartz sand filtration enhanced by nanosized manganese dioxide (nMnO2) has been investigated using typical surface water obtained from northeast China. The results indicate that nMnO2 enhanced quartz sand filtration could remove trace Tl(I) and Tl(III) efficiently through the adsorption of Tl onto nMnO2 added to a water matrix and onto nMnO2 attached on quartz sand surfaces...
September 12, 2017: Chemosphere
https://www.readbyqxmd.com/read/28917808/single-drop-gold-nanoparticles-for-headspace-microextraction-and-colorimetric-assay-of-mercury-ii-in-environmental-waters
#15
Tesfaye Tolessa, Zhi-Qiang Tan, Yong-Guang Yin, Jing-Fu Liu
A novel headspace colorimetric nanosensor strategy for specific detection of Hg(II) was developed based upon analyte induced etching and amalgamation of gold nanoparticles (AuNPs). The Hg(II) was first selectively reduced to its volatile form, Hg(0), by stannous chloride (SnCl2) through chemical cold vapor generation (CVG) reaction. Then, the Hg(0) was headspace extracted into 37μL thioglycolic acid functionalized AuNP aqueous suspension containing 10% methanol as extractant and simultaneously reacted with AuNPs through the strong metallophilic Hg-Au interaction, resulting in a red-to-blue color change...
January 1, 2018: Talanta
https://www.readbyqxmd.com/read/28917770/applicability-of-the-direct-injection-liquid-chromatographic-tandem-mass-spectrometric-analytical-approach-to-the-sub-ngl-1-determination-of-perfluoro-alkyl-acids-in-waste-surface-ground-and-drinking-water-samples
#16
Lorenzo Ciofi, Lapo Renai, Daniele Rossini, Claudia Ancillotti, Alida Falai, Donatella Fibbi, Maria Concetta Bruzzoniti, José Juan Santana-Rodriguez, Serena Orlandini, Massimo Del Bubba
The applicability of a direct injection UHPLC-MS/MS method for the analysis of several perfluoroalkyl acids (PFAAs) in a wide range of water matrices was investigated. The method is based on the direct injection of 100µL of centrifuged water sample, without any other sample treatment. Very good method detection limits (0.014-0.44ngL(-1)) and excellent intra and inter-day precision (RSD% values in the range 1.8-4.4% and 2.7-5.7%, respectively) were achieved, with a total analysis time of 20min per sample. A high number of samples - i...
January 1, 2018: Talanta
https://www.readbyqxmd.com/read/28917550/antidiabetic-potential-of-methanolic-and-flavonoid-rich-leaf-extracts-of-synsepalum-dulcificum-in-type-2-diabetic-rats
#17
Olabisi T Obafemi, Clement A Akinmoladun, Tolulope M Olaleye, Stephen O Agboade, Amos A Onasanya
BACKGROUND: Synsepalum dulcificum is a plant indigenous to West Africa. The fruit is used to modify taste of foods to sweetness. OBJECTIVES: This study aims to investigate the antidiabetic potentials of both methanolic and flavonoid-rich leaf extracts of S. dulcificum (MSD and FSD respectively) in type 2 diabetic Wistar albino rats. MATERIALS AND METHODS: Sixty three rats were randomly distributed into nine groups of seven animals each with group 1 serving as the normal control...
September 13, 2017: Journal of Ayurveda and Integrative Medicine
https://www.readbyqxmd.com/read/28916458/molecular-identification-of-waterborn-free-living-amoebae-acanthamoeba-naegleria-and-vermamoeba-isolated-from-municipal-drinking-water-and-environmental-sources-north-half-of-iran
#18
Ehsan Javanmard, Maryam Niyyati, Jacob Lorenzo-Morales, Zohreh Lasjerdi, Hamed Behniafar, Hamed Mirjalili
The present study tested 80 samples of municipal, geothermal and recreational water samples for the occurrence of waterborn free living amoebae (FLA) including Acanthamoeba, Balamuthia mandrillaris, Vahlkampfiids and Vermamoeba in Semnan province, North half of Iran. Four sets of primers including JDP1,2 primers, ITS1,2 primers (Vahlkampfiids), 16S rRNABal primers (Balamuthia mandrillaris) and NA1,2 primers (Vermamoeba) were used to confirm the morphological identification. From the 80 water samples tested in the present study, 16 (20%) were positive for the outgrowth of free living amoebae based on the morphological page key...
September 12, 2017: Experimental Parasitology
https://www.readbyqxmd.com/read/28915547/persistence-mobility-and-bioavailability-of-emerging-organic-contaminants-discharged-from-sewage-treatment-plants
#19
Kristin M Blum, Patrik L Andersson, Lutz Ahrens, Karin Wiberg, Peter Haglund
Little is known about the impact of emissions of micropollutants from small and large-scale sewage treatment plants (STPs) on drinking water source areas. We investigated a populated catchment that drains into Lake Mälaren, which is the drinking water source for around 2 million people including the inhabitants of Stockholm, Sweden. To assess the persistence, mobility, bioavailability and bioaccumulation of 32 structurally diverse emerging organic contaminants, sediment, integrated passive and grab water samples were collected along the catchment of the River Fyris, Sweden...
September 11, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28915389/choline-prevents-fetal-overgrowth-and-normalizes-placental-fatty-acid-and-glucose-metabolism-in-a-mouse-model-of-maternal-obesity
#20
Juha Nam, Esther Greenwald, Chauntelle Jack-Roberts, Tamara T Ajeeb, Olga V Malysheva, Marie A Caudill, Kathleen Axen, Anjana Saxena, Ekaterina Semernina, Khatia Nanobashvili, Xinyin Jiang
Maternal obesity increases placental transport of macronutrients, resulting in fetal overgrowth and obesity later in life. Choline participates in fatty acid metabolism, serves as a methyl donor and influences growth signaling, which may modify placental macronutrient homeostasis and affect fetal growth. Using a mouse model of maternal obesity, we assessed the effect of maternal choline supplementation on preventing fetal overgrowth and restoring placental macronutrient homeostasis. C57BL/6J mice were fed either a high-fat (HF, 60% kcal from fat) diet or a normal (NF, 10% kcal from fat) diet with a drinking supply of either 25 mM choline chloride or control purified water, respectively, beginning 4 weeks prior to mating until gestational day 12...
August 12, 2017: Journal of Nutritional Biochemistry
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