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https://www.readbyqxmd.com/read/28941409/a-comparison-of-steroid-profiles-in-the-testis-and-seminal-vesicle-of-the-catfish-heteropneustes-fossilis
#1
Radha Chaube, Surabhi Mishra, Rahul Kumar Singh
In the present study, distribution of steroid hormones (estradiol-17β (E2), testosterone (T), corticosteroids and progestins) in the testis and seminal vesicles (SV) of the catfish Heteropneustes fossilis were investigated in two seasons (pre-spawning and spawning phases) of the reproductive cycle. The data showed that the levels of the steroid hormones varied significantly in both reproductive phases and exhibited organ-related differences. Sex steroid levels were highest in the pre-spawning phase and lowest in the spawning phase...
September 9, 2017: Theriogenology
https://www.readbyqxmd.com/read/28941404/development-of-a-simple-multi-residue-determination-method-of-80-veterinary-drugs-in-oplegnathus-punctatus-by-liquid-chromatography-coupled-to-quadrupole-orbitrap-mass-spectrometry
#2
Fei Zhao, Xin Gao, Zhixu Tang, Xin Luo, Miaomiao Wu, Jiachao Xu, Xiaoting Fu
A simple, rapid and sensitive multi-residue analytical method was developed and validated for 80 veterinary drugs in Oplegnathus punctatus using ultrahigh performance liquid chromatography-Orbitrap high resolution mass spectrometry (LC-HRMS). The analytes belong to 12 different families include benzimidazoles, β-lactams, lincosamides, macrolides, nitromidazoles, quinolones, sulfonamides and trimethoprim, tetracyclines, triphenylmethane dyes, amphenicols, nonsteroidal estrogens and steroid hormones. The sample preparation was optimized base on QuEChERS (quick, easy, cheap, effective, rugged and safe) procedure...
September 18, 2017: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/28941402/copper-ii-ions-interactions-in-the-systems-with-triamines-and-atp-potentiometric-and-spectroscopic-studies
#3
S K Hoffmann, J Goslar, R Bregier-Jarzebowska, A Gasowska, A Zalewska, L Lomozik
The mode of interaction and thermodynamic stability of complexes formed in binary and ternary Cu(II)/ATP/triamines systems were studied using potentiometric and spectroscopic (NMR, EPR, UV-Vis) methods. It was found that in binary metal-free systems ATP/HxPA species are formed (PA: Spd=spermidine or 3,3-tri=1,7-diamino-4-azaheptane) where the phosphate groups from nucleotides are preferred negative centers and protonated amine groups of amines are positive centers of reaction. In the ternary systems Cu/ATP/Hx(PA) as well as Cu/(ATP)(PA) species are formed...
September 9, 2017: Journal of Inorganic Biochemistry
https://www.readbyqxmd.com/read/28941401/effect-based-assessment-of-toxicity-removal-during-wastewater-treatment
#4
Pia Välitalo, Riccardo Massei, Ilse Heiskanen, Peter Behnisch, Werner Brack, Andrew J Tindall, David Du Pasquier, Eberhard Küster, Anna Mikola, Tobias Schulze, Markus Sillanpää
Wastewaters contain complex mixtures of chemicals, which can cause adverse toxic effects in the receiving environment. In the present study, the toxicity removal during wastewater treatment at seven municipal wastewater treatment plants (WWTPs) was investigated using an effect-based approach. A battery of eight bioassays was applied comprising of cytotoxicity, genotoxicity, endocrine disruption and fish embryo toxicity assays. Human cell-based CALUX assays, transgenic larval models and the fish embryo toxicity test were particularly sensitive to WWTP effluents...
September 7, 2017: Water Research
https://www.readbyqxmd.com/read/28941399/comparison-of-uv-led-and-low-pressure-uv-for-water-disinfection-photoreactivation-and-dark-repair-of-escherichia-coli
#5
Guo-Qiang Li, Wen-Long Wang, Zheng-Yang Huo, Yun Lu, Hong-Ying Hu
Studies on ultraviolet light-emitting diode (UV-LED) water disinfection have shown advantages, such as safety, flexible design, and lower starting voltages. However, information about reactivation after UV-LED disinfection is limited, which is an important issue of UV light-based technology. In this study, the photoreactivation and dark repair of Escherichia coli after UV-LEDs and low pressure (LP) UV disinfection were compared. Four UV-LED units, 265 nm, 280 nm, the combination of 265 + 280 (50%), and 265 + 280 (75%) were tested...
September 17, 2017: Water Research
https://www.readbyqxmd.com/read/28941398/the-mechanisms-mediating-the-antiepileptic-effects-of-the-ketogenic-diet-and-potential-opportunities-for-improvement-with-metabolism-altering-drugs
#6
REVIEW
Neil A Youngson, Margaret J Morris, Bill Ballard
The ketogenic diet (KD) is increasingly being used to treat patients with intractable epilepsy. Despite decades of research, the reason for its success, when anticonvulsants have failed, is still not completely understood. There are, however, many candidate mechanisms which can be grouped into those that alter neuronal excitability at the synapse, and those that confer neuroprotection. The molecular underpinning of these mechanisms centres on the shift from glucose- to lipid-based energy generation that accompanies a high fat/low carbohydrate diet...
September 13, 2017: Seizure: the Journal of the British Epilepsy Association
https://www.readbyqxmd.com/read/28941396/real-time-ultrasound-angiography-using-superharmonic-dual-frequency-2-25mhz-30mhz-cylindrical-array-in-vitro-study
#7
Zhuochen Wang, K Heath Martin, Paul A Dayton, Xiaoning Jiang
Recent studies suggest that dual-frequency intravascular ultrasound (IVUS) transducers allow detection of superharmonic bubble signatures, enabling acoustic angiography for microvascular and molecular imaging. In this paper, a dual-frequency IVUS cylindrical array transducer was developed for real-time superharmonic imaging. A reduced form-factor lateral mode transmitter (2.25MHz) was used to excite microbubbles effectively at 782kPa with single-cycle excitation while still maintaining the small size and low profile (5Fr) (3Fr=1mm) for intravascular imaging applications...
September 15, 2017: Ultrasonics
https://www.readbyqxmd.com/read/28941389/vitamin-a-nutritional-status-in-high-and-low-income-postpartum-women-and-its-effect-on-colostrum-and-the-requirements-of-the-term-newborn
#8
Cristiane Santos Sânzio Gurgel, Evellyn C Grilo, Larissa Q Lira, Débora G F Assunção, Priscila G Oliveira, Larisse R M de Melo, Silvia V de Medeiros, Luanna C Pessanha, Roberto Dimenstein, Clélia O Lyra
OBJECTIVE: To evaluate the vitamin A status in serum and colostrum of postpartum women with different socioeconomic status, comparing the colostrum retinol supply with the vitamin A requirement of the newborn. METHODS: Cross-sectional study conducted with 424 postpartum women. Vitamin A maternal dietary intake was estimated using a food frequency questionnaire. Colostrum and serum retinol levels were measured by high performance liquid chromatography (HPLC). Serum retinol concentrations <20μg/dL were indicative of vitamin A deficiency (VAD)...
September 20, 2017: Jornal de Pediatria
https://www.readbyqxmd.com/read/28941386/trp64arg-polymorphism-of-the-adrb3-gene-associated-with-maximal-fat-oxidation-and-ldl-c-levels-in-non-obese-adolescents
#9
Íncare Correa de Jesus, Lupe Furtado Alle, Eva Cantalejo Munhoz, Larissa Rosa da Silva, Wendell Arthur Lopes, Luciane Viater Tureck, Katia Sheylla Malta Purim, Ana Claudia Kapp Titski, Neiva Leite
OBJECTIVE: To analyze the association between the Trp64Arg polymorphism of the ADRB3 gene, maximal fat oxidation rates (FATMAX) and the lipid profile levels in non-obese adolescents. METHODS: 72 schoolchildren, of both genders, aged between 11 and 17 years, participated in the study. The anthropometric and body composition variables, in addition to total cholesterol (TC), high density lipoprotein (HDL-c), low density lipoprotein (LDL-c), triglycerides (TG), insulin (INS), and basal glycemia (GLIC), were evaluated...
September 20, 2017: Jornal de Pediatria
https://www.readbyqxmd.com/read/28941360/the-study-on-six-green-insensitive-high-energetic-coordination-polymers-based-on-alkali-alkali-earth-metals-and-4-5-bis-tetrazol-5-yl-2h-1-2-3-triazole
#10
Dong Chen, Dong Jing, Qi Zhang, Xianggui Xue, Shaohua Gou, Hongzhen Li, Fude Nie
Constructing insensitive high-performance ECPs with alkali/alkali-earth metal ions and nitrogen-rich organic backbone has been proved a feasible strategy in this work. Six diverse dimensional novel ECPs (Compounds 1-6) were successfully synthesized from Na(I), Cs(I), Ca(II), Sr(II), Ba(II) ions and a nitrogen-rich triheterocyclic 4,5-Bis(tetrazol-5-yl)-2H-1,2,3-triazole (H3BTT). All compounds show outstanding stability and low sensitivity, the thermal stability of these ECPs are significantly improved as the structural reinforcement increased from 1D to 3D, in which the decomposition temperature of 3D Ba(II) based compound 6 is as high as 397 oC...
September 23, 2017: Chemistry, An Asian Journal
https://www.readbyqxmd.com/read/28941358/rates-of-vaccination-against-streptococcus-pneumoniae-in-cochlear-implant-patients
#11
Anna Piotrowska, Iwona Paradowska-Stankiewicz, Henryk Skarżyński
BACKGROUND Streptococcus pneumoniae can cause life-threatening illness, with invasive pneumococcal diseases (IPD) like meningitis, sepsis, bacteremic pneumonia, and bacteremia being major causes of morbidity and mortality. Studies have shown that patients who have had a cochlear implant, particularly children, have an increased risk of bacterial (pneumococcal) meningitis. Vaccination in patients with cochlear implants is important and recommended universally. The World Health Organization recommends the use of pneumococcal conjugate vaccines in all countries and considers their use to be a priority in all national immunization programs...
September 23, 2017: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/28939533/comparative-mapping-of-on-targets-and-off-targets-for-the-discovery-of-anti-trypanosomatid-folate-pathway-inhibitors
#12
Joanna Panecka-Hofman, Ina Pöhner, Francesca Spyrakis, Talia Zeppelin, Flavio Di Pisa, Lucia Dello Iacono, Alessio Bonucci, Antonio Quotadamo, Alberto Venturelli, Stefano Mangani, Maria Paola Costi, Rebecca C Wade
BACKGROUND: Multi-target approaches are necessary to properly analyze or modify the function of a biochemical pathway or a protein family. An example of such a problem is the repurposing of the known human anti-cancer drugs, antifolates, as selective anti-parasitic agents. This requires considering a set of experimentally validated protein targets in the folate pathway of major pathogenic trypanosomatid parasites and humans: (i) the primary parasite on-targets: pteridine reductase 1 (PTR1) (absent in humans) and bifunctional dihydrofolate reductase-thymidylate synthase (DHFR-TS), (ii) the primary off-targets: human DHFR and TS, and (iii) the secondary on-target: human folate receptor β, a folate/antifolate transporter...
September 20, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28938794/association-between-plant-based-diets-and-plasma-lipids-a-systematic-review-and-meta-analysis
#13
Yoko Yokoyama, Susan M Levin, Neal D Barnard
Context: Although a recent meta-analysis of randomized controlled trials showed that adoption of a vegetarian diet reduces plasma lipids, the association between vegetarian diets and long-term effects on plasma lipids has not been subjected to meta-analysis. Objective: The aim was to conduct a systematic review and meta-analysis of observational studies and clinical trials that have examined associations between plant-based diets and plasma lipids. Data Sources: MEDLINE, Web of Science, and the Cochrane Central Register of Controlled Trials were searched for articles published in English until June 2015...
September 1, 2017: Nutrition Reviews
https://www.readbyqxmd.com/read/28938793/effects-of-protein-or-amino-acid-supplementation-on-the-physical-growth-of-young-children-in-low-income-countries
#14
Joanne E Arsenault, Kenneth H Brown
Child growth stunting is common in low-income countries, possibly due to insufficient protein intakes. Most previous studies have concluded that children's protein intakes are adequate in relation to estimated requirements, but these studies did not consider issues of protein digestibility and effects of infection on dietary protein utilization. Using an alternative approach to assess the possible role of protein inadequacy in children's growth restriction, the results of 18 intervention trials in which supplementary protein or amino acids were provided to children ages 6-35 months and growth outcomes were reviewed...
September 1, 2017: Nutrition Reviews
https://www.readbyqxmd.com/read/28938791/effects-of-a-high-dose-of-microbial-phytase-and-myo-inositol-supplementation-on-growth-performance-tibia-mineralization-nutrient-digestibility-litter-moisture-content-and-foot-problems-in-broiler-chickens-fed-phosphorus-deficient-diets
#15
D Farhadi, A Karimi, Gh Sadeghi, J Rostamzadeh, M R Bedford
A total of 660 one-day-old Ross 308 broiler chicks were randomly distributed into eleven dietary treatments. Treatments included a maize-soybean meal-based diet with recommended calcium (Ca) and non-phytate phosphorus (nPP) (positive control; PC), an nPP-deficient diet (negative control; NC), NC diets supplemented with different levels of phytase (0, 500, 1,000, 2,000, 3,000, 4,000, 5,000, and 6,000 FTU/kg), a NC diet plus 0.15% myo-inositol, and a NC diet with reduced Ca level (Ca to nPP ratio same as PC)...
October 1, 2017: Poultry Science
https://www.readbyqxmd.com/read/28938780/effects-of-dietary-threonine-supplementation-on-intestinal-barrier-function-and-gut-microbiota-of-laying-hens
#16
X Y Dong, M M M Azzam, X T Zou
The effects of supplemental dietary threonine (Thr) on laying performance, expression of intestinal mucin 2 (MUC2) and secretory IgA (sIgA), and intestinal microbiota of laying hens fed a low CP diet were investigated. A total of 240 Lohmann Brown laying hens, 28 wk of age, was allocated to 3 dietary treatments, each of which included 5 replicates of 16 hens. Hens were fed a control diet (16% CP), a low CP diet (14% CP), or a low CP diet supplemented with 0.3% L-Thr for 12 weeks. Chemical analyses of the diets for Thr are 0...
October 1, 2017: Poultry Science
https://www.readbyqxmd.com/read/28938771/comparative-estimation-of-inevitable-endogenous-ileal-flow-of-amino-acids-in-pekin-ducks-under-varying-dietary-or-physiological-conditions-and-their-significance-to-nutritional-requirements-for-amino-acids
#17
D O Akinde
In 2 experiments in Pekin ducks the inevitable endogenous ileal flow (IEIF) of AA was estimated at changing intake and source of crude fiber (CF) or soybean oil (SO) level. Also the roles of dry matter intake (DMI) and BW or age as well as the proportion of IEIF in the dietary requirement for AA were studied. In experiment 1 three basal CP (20, 60, or 100 g/kg) diets were formulated containing a low CF (LCF, 30 g/kg) or high (HCF, 80 g/kg) level; achieved with cellulose supplementation. All diets were similar in every other respect including having SO content of 40 g/kg...
October 1, 2017: Poultry Science
https://www.readbyqxmd.com/read/28938767/isothermal-gelation-behavior-of-myofibrillar-proteins-from-white-and-red-chicken-meat-at-different-temperatures
#18
S Glorieux, L Steen, H Paelinck, I Foubert, I Fraeye
This paper provides insights in the isothermal gelation behavior of white and red chicken myofibrillar proteins (CMP) at different temperatures (20 to 80°C) and the underlying aggregation mechanism, allowing understanding of structure formation in poultry products during thermal processing. At low temperatures (20 to 60°C), an increase in aromatic surface hydrophobicity (SoANS) was found, suggesting potential formation of hydrophobic interactions between CMP. At higher temperatures (60 to 80°C), high SoANS and a significant decrease in total sulfhydryl amount (SH-amount) strongly indicate the presence of hydrophobic interactions and disulfide bonding, resulting in aggregation, as suggested by sodium dodecyl sulfate polyacrylamide gel electrophoresis (SDS-PAGE)...
October 1, 2017: Poultry Science
https://www.readbyqxmd.com/read/28938763/abnormal-histopathology-fat-percent-and-hepatic-apolipoprotein-a-i-and-apolipoprotein-b100-mrna-expression-in-fatty-liver-hemorrhagic-syndrome-and-their-improvement-by-soybean-lecithin
#19
Yalu Song, Jiming Ruan, Junrong Luo, Tiancheng Wang, Fei Yang, Huabin Cao, Jianzhen Huang, Guoliang Hu
To investigate the etiopathogenesis of fatty liver hemorrhagic syndrome (FLHS) and the protective effects of soybean lecithin against FLHS in laying hens, 135 healthy 300-day-old Hyline laying hens were randomly divided into groups: control (group 1), diseased (group 2), and protected (group 3). Each group contained 45 layers with 3 replicates. The birds in these 3 groups were fed a control diet, a high-energy/low-protein (HELP) diet or the HELP diet supplemented with 3% soybean lecithin instead of maize. The fat percent in the liver was calculated...
October 1, 2017: Poultry Science
https://www.readbyqxmd.com/read/28938749/the-testicular-transcriptome-associated-with-spermatogonia-differentiation-initiated-by-gonadotrophin-stimulation-in-the-juvenile-rhesus-monkey-macaca-mulatta
#20
Suresh Ramaswamy, William H Walker, Paula Aliberti, Rahil Sethi, Gary R Marshall, Alyxzandria Smith, Seyedmehdi Nourashrafeddin, Alicia Belgorosky, Uma R Chandran, Mark P Hedger, Tony M Plant
STUDY QUESTION: What is the genetic landscape within the testis of the juvenile rhesus monkey (Macaca mulatta) that underlies the decision of undifferentiated spermatogonia to commit to a pathway of differentiation when puberty is induced prematurely by exogenous LH and FSH stimulation? SUMMARY ANSWER: Forty-eight hours of gonadotrophin stimulation of the juvenile monkey testis resulted in the appearance of differentiating B spermatogonia and the emergence of 1362 up-regulated and 225 down-regulated testicular mRNAs encoding a complex network of proteins ranging from enzymes regulating Leydig cell steroidogenesis to membrane receptors, and from juxtacrine and paracrine factors to transcriptional factors governing spermatogonial stem cell fate...
October 1, 2017: Human Reproduction
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