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https://www.readbyqxmd.com/read/28822342/responses-of-trophic-structure-and-zooplankton-community-to-salinity-and-temperature-in-tibetan-lakes-implication-for-the-effect-of-climate-warming
#1
Qiuqi Lin, Lei Xu, Juzhi Hou, Zhengwen Liu, Erik Jeppesen, Bo-Ping Han
Warming has pronounced effects on lake ecosystems, either directly by increased temperatures or indirectly by a change in salinity. We investigated the current status of zooplankton communities and trophic structure in 45 Tibetan lakes along a 2300 m altitude and a 76 g/l salinity gradient. Freshwater to hyposaline lakes mainly had three trophic levels: phytoplankton, small zooplankton and fish/Gammarus, while mesosaline to hypersaline lakes only had two: phytoplankton and large zooplankton. Zooplankton species richness declined significantly with salinity, but did not relate with temperature...
August 1, 2017: Water Research
https://www.readbyqxmd.com/read/28822324/preventive-effects-of-interleukin-6-in-lipopolysaccharide-d-galactosamine-induced-acute-liver-injury-via-regulating-inflammatory-response-in-hepatic-macrophages
#2
Long Li, Chaoli Duan, Yan Zhao, Xiaofang Zhang, Hongyan Yin, Tianxi Wang, Caoxin Huang, Suhuan Liu, Shuyu Yang, Xuejun Li
Lipopolysaccharide/d-Galactosamine (LPS/d-Gal)-induced acute liver injury is characterized by significant inflammatory responses including TNF-α and interleukin-6 (IL-6) and is a widely applied experimental model for inflammation research. TNF-α is critical in the progression of LPS/d-Gal-induced liver injury. However, the role of IL-6 in this model is still unknown. In the present study, we aim to elucidate the involvement of IL-6 in the pathogenesis of acute liver injury induced by LPS/d-Gal in mice and its underlying mechanism...
August 16, 2017: International Immunopharmacology
https://www.readbyqxmd.com/read/28822315/applications-of-radon-and-radium-isotopes-to-determine-submarine-groundwater-discharge-and-flushing-times-in-todos-os-santos-bay-brazil
#3
Vanessa Hatje, Karina Kammer Attisano, Marcelo Friederichs Landim de Souza, Barbara Mazzilli, Joselene de Oliveira, Tamires de Araújo Mora, William C Burnett
Todos os Santos Bay (BTS) is the 2nd largest bay in Brazil and an important resource for the people of the State of Bahia. We made measurements of radon and radium in selected areas of the bay to evaluate if these tracers could provide estimates of submarine groundwater discharge (SGD) and flushing times of the Paraguaçu Estuary and BTS. We found that there were a few areas along the eastern and northeastern shorelines that displayed relatively high radon and low salinities, indicating possible sites of enhanced SGD...
August 16, 2017: Journal of Environmental Radioactivity
https://www.readbyqxmd.com/read/28822258/photochemical-oxidation-of-dimethylsulphide-to-dimethylsulphoxide-in-estuarine-and-coastal-waters
#4
Günther Uher, J Julian Pillans, Angela D Hatton, Robert C Upstill-Goddard
Dimethylsulphide (DMS) photo-oxidation and dimethylsulphoxide (DMSO) photoproduction were estimated in 26 laboratory irradiations of coastal samples from NE England (Tyne estuary) and W Scotland (Loch Linnhe and River Nant at Taynuilt). Pseudo-first order rate constants of DMS photo-oxidation (0.038 h(-1) to 0.345 h(-1)) and DMSO photo-production (0.017 h(-1) to 0.283 h(-1)) varied by one order of magnitude and were lowest in the coastal North Sea. Estuarine samples (salinity S < 30) had a mean DMSO yield of 96 ± 16% (n = 14), consistent with 1:1 M conversion via photosensitised oxidation by singlet oxygen...
August 11, 2017: Chemosphere
https://www.readbyqxmd.com/read/28822093/leonardite-derived-humic-substances-are-great-adsorbents-for-cadmium
#5
Fande Meng, Guodong Yuan, Jing Wei, Dongxue Bi, Hailong Wang
Adsorption is an important mechanism to immobilize cadmium (Cd) in soil, for which humic substances have a potential. However, commercial humic substances are either very acidic (pH = 2) or alkaline/Na(+)-enriched, making them less suitable for use in acid and saline soils. Here, we used leonardite to produce humic adsorbents HA (pH = 4.02), Ca-HA (pH = 10.9), and Ca-CPAM-HA (pH = 9.62) by using HCl, CaCl2, or CaCl2-polyacrylamide as a flocculant. Their elemental compositions, acidity, and spectroscopic properties were determined, and their Cd adsorption characteristics were assessed by batch kinetic and thermodynamic experiments at environmentally relevant concentrations...
August 18, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28821952/genome-wide-association-study-and-gene-set-analysis-for-understanding-candidate-genes-involved-in-salt-tolerance-at-the-rice-seedling-stage
#6
Jie Yu, Weiguo Zao, Qiang He, Tae-Sung Kim, Yong-Jin Park
Salt is the major factor limiting crop productivity in saline soils and is controlled by various genes. The development of salt-tolerant rice through molecular breeding methods is important to meet the needs of rice breeding. We used 295 accessions to perform a genome-wide association study (GWAS) of salt tolerance-related phenotypes in rice at the seedling stage and obtained 93 candidate genes with high association peaks across six phenotypes. We constructed a protein interaction network using the candidate genes identified here, and 33 genes were associated...
August 18, 2017: Molecular Genetics and Genomics: MGG
https://www.readbyqxmd.com/read/28821187/genetic-dissection-of-seedling-stage-salinity-tolerance-in-rice-using-introgression-lines-of-a-salt-tolerant-landrace-nona-bokra
#7
Venkata Ramana Rao Puram, John Ontoy, Steven Linscombe, Prasanta K Subudhi
Salinity is an important abiotic stress affecting rice production worldwide. Development of salt tolerant varieties is the most feasible approach for improving rice productivity in salt affected soils. In rice, seedling stage salinity tolerance is crucial for better crop establishment. Quantitative trait loci (QTL) mapping using introgression lines (ILs) is useful for identification and simultaneous transfer of desirable alleles into elite genetic background. In the present study, 138 ILs derived from the cross between a high yielding elite salt susceptible japonica rice cultivar Jupiter and a salt tolerant indica landrace Nona Bokra were evaluated for salt tolerance at seedling stage in a hydroponics experiment and were genotyped using 126 simple sequence repeat markers...
September 1, 2017: Journal of Heredity
https://www.readbyqxmd.com/read/28821068/radiation-synthesis-and-performance-of-novel-cellulose-based-microsphere-adsorbents-for-efficient-removal-of-boron-iii
#8
Siqi Liu, Min Xu, Tianlin Yu, Dong Han, Jing Peng, Jiuqiang Li, Maolin Zhai
A novel cellulose-based microsphere containing glucamine groups, referred as CVN, was successfully synthesized by radiation-induced graft polymerization of 4-vinylbenzyl chloride onto cellulose microspheres and subsequent functionalization with N-methyl-d-glucamine. The adsorption by CVN for boron (III) from aqueous solutions was evaluated systematically by batch adsorption technique. Langmuir models could fit well with the adsorption behavior of CVN. The CVN adsorbents exhibited a high adsorption capacity up to 12...
October 15, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28820646/consequences-of-puberty-on-efficacy-of-intraocular-pressure-lowering-drugs-in-male-dutch-belted-rabbits
#9
Cassandra L Hays, Kingsley C Okafor, Shan Fan, Robin High, Dhirendra P Singh, Carol B Toris
PURPOSE: To investigate the changes in intraocular pressure (IOP), aqueous flow, and outflow facility, as well as efficacy of IOP-lowering drugs before and after sexual development in rabbits. METHODS: Male Dutch-belted rabbits were studied at night between the ages of 8 and 44 weeks. During these times, body weight, testicular volume, and serum testosterone were measured to monitor sexual maturity. Ocular measurements included anterior chamber depth, central corneal thickness, IOP, aqueous flow, and outflow facility...
August 18, 2017: Journal of Ocular Pharmacology and Therapeutics
https://www.readbyqxmd.com/read/28820251/aluminum-doped-mcm-41-nanoparticles-as-platforms-for-the-dual-encapsulation-of-a-co-releasing-molecule-and-cisplatin
#10
Francisco J Carmona, Ignacio Jiménez-Amezcua, Sara Rojas, Carlos C Romão, Jorge A R Navarro, Carmen R Maldonado, Elisa Barea
Mesoporous silica Al-MCM-41 nanoparticles have been used, for the first time, as vehicles for the single and dual encapsulation of the cationic CO-releasing molecule (CORM) [Mn(1,4,7-triazacyclononane)(CO)3](+) (ALF472(+)) and the well-known antineoplastic drug, cis-[PtCl2(NH3)2] (cisplatin). Thus, two new hybrid materials, namely, ALF472@Al-MCM-41 and ALF472-cisplatin@Al-MCM-41, have been isolated and fully characterized. The results reveal that the presence of CORM molecules enhances cisplatin loading 3-fold, yielding a cargo of 0...
August 18, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28820183/technique-of-retinal-gene-therapy-delivery-of-viral-vector-into-the-subretinal-space
#11
K Xue, M Groppe, A P Salvetti, R E MacLaren
PurposeSafe and reproducible delivery of gene therapy vector into the subretinal space is essential for successful targeting of the retinal pigment epithelium (RPE) and photoreceptors. The success of surgery is critical for the clinical efficacy of retinal gene therapy. Iatrogenic detachment of the degenerate (often adherent) retina in patients with hereditary retinal degenerations and small volume (eg, 0.1 ml) subretinal injections pose new surgical challenges.MethodsOur subretinal gene therapy technique involved pre-operative planning with optical coherence tomography (OCT) and autofluorescence (AF) imaging, 23 G pars plana vitrectomy, internal limiting membrane staining with Membrane Blue Dual (DORC BV, Zuidland, Netherlands), a two-step subretinal injection using a 41 G Teflon tipped cannula (DORC) first with normal saline to create a parafoveal bleb followed by slow infusion of viral vector via the same self-sealing retinotomy...
August 18, 2017: Eye
https://www.readbyqxmd.com/read/28819915/suppression-of-methionine-induced-colon-injury-of-young-rats-by-cysteine-and-n-acetyl-l-cysteine
#12
Marija Stojanović, Ljiljana Šćepanović, Dušan Todorović, Dušan Mitrović, Vuk Šćepanović, Radomir Šćepanović, Slobodan Ilić, Teja Šćepanović, Milica Labudović Borović, Živana Milićević, Vesna Dragutinović, Sunčica Borozan, Ivana Lalić, Sanja Despotović, Dragan Djuric
Changes in the methionine metabolism can cause a state called hyperhomocysteinemia, inducing oxidative stress in the gut. The production of free radicals is important in the colon damage caused by methionine. This study aimed at evaluating the effect of the use of L-cysteine and N-acetyl-L-cysteine on the colon morphometry of young rats treated with methionine. A total number of 32 male rats were distributed in a randomized experimental design in 4 groups: control group treated with saline; methionine group; cysteine + methionine group, and N-acetyl-L-cysteine + methionine group...
August 17, 2017: Molecular and Cellular Biochemistry
https://www.readbyqxmd.com/read/28819820/genome-wide-characterization-of-the-wrky-gene-family-in-radish-raphanus-sativus-l-reveals-its-critical-functions-under-different-abiotic-stresses
#13
Bernard Kinuthia Karanja, Lianxue Fan, Liang Xu, Yan Wang, Xianwen Zhu, Mingjia Tang, Ronghua Wang, Fei Zhang, Everlyne M'mbone Muleke, Liwang Liu
The radish WRKY gene family was genome-widely identified and played critical roles in response to multiple abiotic stresses. The WRKY is among the largest transcription factors (TFs) associated with multiple biological activities for plant survival, including control response mechanisms against abiotic stresses such as heat, salinity, and heavy metals. Radish is an important root vegetable crop and therefore characterization and expression pattern investigation of WRKY transcription factors in radish is imperative...
August 17, 2017: Plant Cell Reports
https://www.readbyqxmd.com/read/28819625/antagonistic-properties-of-some-halophilic-thermoactinomycetes-isolated-from-superficial-sediment-of-a-solar-saltern-and-production-of-cyclic-antimicrobial-peptides-by-the-novel-isolate-paludifilum-halophilum
#14
Donyez Frikha Dammak, Ziad Zarai, Soumaya Najah, Rayed Abdennabi, Lassaad Belbahri, Mostafa E Rateb, Hafedh Mejdoub, Sami Maalej
This study has focused on the isolation of twenty-three halophilic actinomycetes from two ponds of different salinity and the evaluation of their ability to exert an antimicrobial activity against both their competitors and several other pathogens. From the 23 isolates, 18 strains showed antagonistic activity, while 19 showed activities against one or more of the seven pathogen strains tested. Six strains exhibited consistent antibacterial activity against Gram-negative and Gram-positive pathogens characterized at the physiological and molecular levels...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28819442/interferon-%C3%AE-promotes-the-expression-of-cancer-stem-cell-markers-in-oral-squamous-cell-carcinoma
#15
Hailong Ma, Shufang Jin, Wenyi Yang, Zhuowei Tian, Shuli Liu, Yang Wang, Ge Zhou, Mei Zhao, Shalva Gvetadze, Zhiyuan Zhang, Jingzhou Hu
Objectives: IFNα can stimulate an antitumor immune response and has a direct inhibition on cancer cells. This study is to test whether IFNα can activate dormant cancer stem cell (CSC) in oral squamous cell carcinoma (OSCC) to facilitate their elimination by chemotherapy. Materials and methods: Nude mouse transplantation tumor model was established and administrated with IFNα and saline. The influence on CD44 and ALDH1A1 expression under IFNα treatment was detected by in vivo experiments. Flow cytometry, western blot, and immunofluorescence were used to detect the expression of CD44 and ALDH1A1 after INFa treatment in OSCC cell lines...
2017: Journal of Cancer
https://www.readbyqxmd.com/read/28819188/highly-stabilized-core-satellite-gold-nanoassemblies-in-vivo-dna-directed-self-assembly-peg-modification-and-cell-imaging
#16
Liangfeng Tang, Guiping Yu, Lishan Tan, Min Li, Xiulong Deng, Jianyu Liu, Aiqing Li, Xuandi Lai, Jianqiang Hu
Au nanoparticles (NPs) have important applications in bioimaging, clinical diagnosis and even therapy due to its water-solubility, easy modification and drug-loaded capability, however, easy aggregation of Au NPs in normal saline and serum greatly limits its applications. In this work, highly stabilized core-satellite Au nanoassemblies (CSAuNAs) were constructed by a hierarchical DNA-directed self-assembly strategy, in which satellite Au NPs number could be effectively tuned through varying the ratios of core-AuNPs-ssDNA and satellite-AuNPs-ssDNAc...
August 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28819187/administration-of-mesenchymal-stromal-cells-before-renal-ischemia-reperfusion-attenuates-kidney-injury-and-may-modulate-renal-lipid-metabolism-in-rats
#17
Pauline Erpicum, Pascal Rowart, Laurence Poma, Jean-Marie Krzesinski, Olivier Detry, François Jouret
Mesenchymal stromal cells (MSC) have been demonstrated to attenuate renal ischemia/reperfusion (I/R) damage in rodent models. The mechanisms of such nephro-protection remain largely unknown. Furthermore, the optimal timing of MSC administration has been poorly investigated. Here, we compare the impact of MSC injection 7 days before (MSCD - 7) versus 1 day after (MSCD + 1) renal I/R in rats. Control groups received equivalent volumes of saline at similar time-points (SD - 7 and SD + 1). Right nephrectomy was performed, and left renal ischemia lasted 45 min...
August 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28819160/effects-of-catalase-on-chloroplast-arrangement-in-opuntia-streptacantha-chlorenchyma-cells-under-salt-stress
#18
Diana Marcela Arias-Moreno, Juan Francisco Jiménez-Bremont, Israel Maruri-López, Pablo Delgado-Sánchez
In arid and semiarid regions, low precipitation rates lead to soil salinity problems, which may limit plant establishment, growth, and survival. Herein, we investigated the NaCl stress effect on chlorophyll fluorescence, photosynthetic-pigments, movement and chloroplasts ultrastructure in chlorenchyma cells of Opuntia streptacantha cladodes. Cladodes segments were exposed to salt stress at 0, 100, 200, and 300 mM NaCl for 8, 16, and 24 h. The results showed that salt stress reduced chlorophyll content, F v /F m , ΦPSII, and qP values...
August 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28818759/increased-cell-wall-thickness-of-endodermis-and-protoxylem-in-aeluropus-littoralis-roots-under-salinity-the-role-of-lac4-and-per64-genes
#19
Behrouz Barzegargolchini, Ali Movafeghi, Ali Dehestani, Pooyan Mehrabanjoubani
Enhanced cell wall lignification is one of the major salinity tolerance strategies in the roots of halophytes. A deep insight into the exact root developmental system in halophytes may be of great importance for understanding plant salt tolerance mechanisms. In this work the developmental and anatomical changes in the roots of halophyte Aeluropus littoralis along with expression patterns of two genes encoding for cell wall laccase (LAC4) and peroxidase (PER64) were investigated. The plants were treated with 0, 300 and 600mM NaCl and root samples were collected 3, 6 and 9days after treatment (DAT)...
August 4, 2017: Journal of Plant Physiology
https://www.readbyqxmd.com/read/28818716/positron-emission-tomography-pet-imaging-of-nicotine-induced-dopamine-release-in-squirrel-monkeys-using-18-f-fallypride
#20
Jennifer E Naylor, Takato Hiranita, Katelin S Matazel, Xuan Zhang, Merle G Paule, Amy K Goodwin
BACKGROUND: Nicotine, the principal psychoactive tobacco constituent, is thought to produce its reinforcing effects via actions within the mesolimbic dopamine (DA) system. The objective of the current study was to examine the effect of nicotine on DA D2/D3 receptor availability in the nonhuman primate brain with the use of the radioligand [(18)F]fallypride and positron emission tomography (PET). METHODS: Ten adult male squirrel monkeys were used in the current study...
August 8, 2017: Drug and Alcohol Dependence
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