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https://www.readbyqxmd.com/read/29783231/allergenic-weed-pollen-forecast-under-the-mathematical-modeling-method-implementation-in-ukraine
#1
Irina I Motruk, Michael Yu Antomonov, Victoria V Rodinkova, Olena E Aleksandrova, Oleh V Yermishev
OBJECTIVE: Introduction: Allergies are the most common reason of the chronic diseases in developed countries and represent an important medical, social and economic issue, the relevance of which is growing both in these countries and in Ukraine. The most famous of these allergens group is the pollen of ambrosia and pollen of poaceae, which are ubiquitously distributed in the subtropical and temperate climate. The aim: The objective of our study was to develop the mathematical models, which will be able to indicate the probability of the pollen circulation, and thus these models can simplify the forecast of symptoms risk and improve the prophylaxis of pollinosis...
2018: Wiadomości Lekarskie: Organ Polskiego Towarzystwa Lekarskiego
https://www.readbyqxmd.com/read/29783198/toxicity-assessment-of-metal-oxide-nano-pollutants-on-tomato-solanum-lycopersicon-a-study-on-growth-dynamics-and-plant-cell-death
#2
Bilal Ahmed, Mohammad Saghir Khan, Javed Musarrat
The present study for the first time demonstrated the interactions of metal oxide (MO) nano-pollutants (CuO and Al2 O3 -NPs) with tissues and cellular DNA of tomato plants grown in soil sand: silt: clay (667:190:143) and Hoagland-hydroponic system and assessed the hazardous effects of NPs on cell physiology and biochemistry. Results of SEM equipped with EDX revealed attachment of variably shaped CuO-NPs (18 nm) and Al2 O3 -NPs (21 nm) on roots, and internalization followed by translocation in plants by ICP-MS and TEM...
May 18, 2018: Environmental Pollution
https://www.readbyqxmd.com/read/29783188/%C3%AE-pyrone-compounds-flavonoids-and-maltol-glucoside-derivatives-from-herniaria-glabra-l-collected-in-the-ternopil-region-of-the-ukraine
#3
Solomiia Kozachok, Łukasz Pecio, Joanna Kolodziejczyk-Czepas, Svitlana Marchyshyn, Pawel Nowak, Jarosław Mołdoch, Wiesław Oleszek
The phytochemical investigation of the whole plant extracts of Herniaria glabra L. (Caryophyllaceae) led to the identification and isolation of four known flavonoids, one known and three undescribed maltol derivatives, and benzyl β-gentiobioside. The structures were established by extensive 1D and 2D NMR spectroscopic analyses, as well as HRESIMS data. For the first time in Herniaria genus, as well as in Caryophylaceae family the presence of apiorutin {quercetin 3-O-[(D-apio-β-d-furanosyl-(1 → 2)-O-[-α-l-rhamnopyranosyl-(1 → 6)]-β-d-glucopyranoside]} and licoagroside B {maltol 3-O-[6-O-(3-hydroxy-3-methylglutaroyl)]-β-d-glucopyranoside} were revealed...
May 18, 2018: Phytochemistry
https://www.readbyqxmd.com/read/29783187/impact-of-drought-and-salt-stress-on-the-biosynthesis-of-alkaloids-in-chelidonium-majus-l
#4
Mahdi Yahyazadeh, Rieke Meinen, Robert Hänsch, Sara Abouzeid, Dirk Selmar
When plants are exposed to various stress situations, their alkaloid concentration frequently is enhanced. This well-known phenomenon is presumably due to a passively enhanced rate of biosynthesis, caused by greatly elevated concentrations of NADPH in stressed plants. Here, we used Chelidonium majus L. plants, which accumulate high concentrations of dihydrocoptisine in their leaves, to study the impact of drought and salt stress on the biosynthesis and accumulation of alkaloids. In comparison to well-watered controls, in the transcriptome of the gene encoding the key enzyme in alkaloid biosynthesis, stylopine synthase, is enhanced in stressed C...
May 18, 2018: Phytochemistry
https://www.readbyqxmd.com/read/29783182/effects-of-overproduced-ethylene-on-the-contents-of-other-phytohormones-and-expression-of-their-key-biosynthetic-genes
#5
Weiqiang Li, Rie Nishiyama, Yasuko Watanabe, Chien Van Ha, Mikiko Kojima, Ping An, Lei Tian, Chunjie Tian, Hitoshi Sakakibara, Lam-Son Phan Tran
Ethylene is involved in regulation of various aspects of plant growth and development. Physiological and genetic analyses have indicated the existence of crosstalk between ethylene and other phytohormones, including auxin, cytokinin (CK), abscisic acid (ABA), gibberellin (GA), salicylic acid (SA), jasmonic acid (JA), brassinosteroid (BR) and strigolactone (SL) in regulation of different developmental processes. However, the effects of ethylene on the biosynthesis and contents of these hormones are not fully understood...
May 10, 2018: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/29783166/in-situ-sludge-reduction-and-carbon-reuse-in-an-anoxic-oxic-process-coupled-with-hydrocyclone-breakage
#6
Yinxiang Xu, Yuanyuan Fang, Zhenhua Wang, Dan Guo, Yi Liu, Yuan Huang, Pengbo Fu, Juehui Jin, Chenwen Wei, Hualin Wang, Tao Zeng
The long-term performance of an anoxic-oxic-hydrocyclone (AOH) process with an in-situ hydrocyclone treatment unit in the mixed liquid return line for sludge reduction and carbon reuse has been observed, in comparison with a conventional anoxic-oxic (AO) process. Three parallel side-stream systems, including one AOH25 system with a 25-mm hydrocyclone, one AOH35 system with a 35-mm hydrocyclone and one AO system, were built and fed with real wastewater for a comparative study in a wastewater treatment plant...
May 9, 2018: Water Research
https://www.readbyqxmd.com/read/29783128/treatment-of-acidic-sulfate-containing-wastewater-using-revolving-algae-biofilm-reactors-sulfur-removal-performance-and-microbial-community-characterization
#7
Haoyuan Zhou, Yanqing Sheng, Xuefei Zhao, Martin Gross, Zhiyou Wen
Industries such as mining operations are facing challenges of treating sulfur-containing wastewater such as acid mine drainage (AMD) generated in their plant. The aim of this work is to evaluate the use of a revolving algal biofilm (RAB) reactor to treat AMD with low pH (3.5-4) and high sulfate content (1-4 g/L). The RAB reactors resulted in sulfate removal efficiency up to 46% and removal rate up to 0.56 g/L-day, much higher than those obtained in suspension algal culture. The high-throughput sequencing revealed that the RAB reactor contained diverse cyanobacteria, green algae, diatoms, and acid reducing bacteria that contribute the sulfate removal through various mechanisms...
May 18, 2018: Bioresource Technology
https://www.readbyqxmd.com/read/29783117/changes-in-soil-nitrogen-dynamics-caused-by-prescribed-fires-in-dense-gorse-lands-in-sw-pyrenees
#8
Leire Múgica, Rosa M Canals, Leticia San Emeterio
Rural depopulation, abandonment of traditional land uses and decrease of extensive stockfarming is accelerating shrub encroachment in mountain areas. In NW Spain, gorse (Ulex gallii Planch.) is expanding, developing dense shrublands that accumulate high fuel-loads, ignite easily and persist during long periods as alternate stable states. Under this scenario, traditional bush-to-bush farming fires are being replaced by high fuel-load burnings performed by specialised teams to reduce fuels and promote mosaic landscapes...
May 18, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/29783114/geosphere-biosphere-circulation-of-chemical-elements-in-soil-and-plant-systems-from-a-100-km-transect-from-southern-central-norway
#9
Clemens Reimann, Karl Fabian, Belinda Flem, Malin Andersson, Peter Filzmoser, Peter Englmaier
Geochemical element separation is studied in 14 different sample media collected at 41 sites along an approximately 100-km long transect north of Oslo. At each site, soil C and O horizons and 12 plant materials (birch/spruce/cowberry/blueberry leaves/needles and twigs, horsetail, braken fern, pine bark and terrestrial moss) were sampled. The observed concentrations of 29 elements (K, Ca, P, Mg, Mn, S, Fe, Zn, Na, B, Cu, Mo, Co, Al, Ba, Rb, Sr, Ti, Ni, Pb, Cs, Cd, Ce, Sn, La, Tl, Y, Hg, Ag) were used to investigate soil-plant relations, and to evaluate the element differentiation between different plants, or between foliage and twigs of the same plant...
May 17, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/29783108/a-new-perspective-to-aberrations-caused-by-barium-and-vanadium-ions-on-lens-culinaris-medik
#10
Murat Çanlı
This study investigates aberrations caused by barium and vanadium on meristematic cells of Lens culinaris Medik. Barium and vanadium ions at various concentrations (0.05 M, 0.1 M, 0.25 M, 0.5 M, and 1.0 M) were exposed to the seeds of the plant at fixed time interval (12 h). After seedlings, with a microscopic examination images were captured about the root tips. Those images showed that several abnormalities occurred on the plant such as chromosome breakings, chromosome dispersion, bridge chromosome, chromosome adherence, ring chromosome...
May 18, 2018: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/29783107/effect-of-cd-on-growth-physiological-response-cd-subcellular-distribution-and-chemical-forms-of-koelreuteria-paniculata
#11
Lan Peng Yang, Jian Zhu, Ping Wang, Jing Zeng, Rong Tan, Yu Zhong Yang, Zhi Ming Liu
Koelreuteria paniculata were cultivated in nutrient solution with different concentrations of Cd (0, 50, 150, 250 and 500 µM) and sampled after 90 days. The resistance, translocation, accumulation and stress responses in Koelreuteria paniculata were investigated by hydroponic experiments. The results showed that Koelreuteria paniculata is an efficient Cd excluder that can tolerate high concentrations of Cd (up to 150-250 µM of Cd). The concentration of Cd never exceeds 5 ppm in leaves and 10 ppm in roots...
May 18, 2018: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/29783097/regulation-of-phytosterol-biosynthetic-pathway-during-drought-stress-in-rice
#12
M S Sujith Kumar, Ibandalin Mawlong, Kishwar Ali, Aruna Tyagi
Plants respond to drought stress in the form of various physio-biochemical and molecular changes at both cellular and molecular levels. Drought stress causes the destruction of cell membranes by disintegration of membrane lipids. One of the major groups of membrane lipids that plays important role in preserving the integrity of cell membranes is phytosterols. HMG-CoA reductase (HMGR) is the principal enzyme in the biosynthesis of plant sterols, synthesized via mevalonic acid pathway. Phospholipid: sterol acyltransferase (PSAT) is another important enzyme that plays an important role in turnover of phytosterols into steryl esters and helps maintain homeostasis of membrane lipids...
May 15, 2018: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/29783057/evaluation-of-water-relation-parameters-in-vitis-rootstocks-with-different-drought-tolerance-and-their-effects-on-growth-of-a-grafted-cultivar
#13
Gregorio Gullo, Antonio Dattola, Vincenzo Vonella, Rocco Zappia
Knowledge of root hydraulic resistance will allow us to better understand water relations arising in the soil-plant-atmosphere continuum. These are the basis for better control of plant behaviour in the current environmental context that is more and more affected by global warming and problems related to increased drought frequency and duration. The objectives of this study were to determine how the growth of a cultivar changes in response to the drought tolerance of the rootstock used in Vitis grown in a semi-arid area and how the root hydraulic resistivity and root hydraulic conductivity change with increased transpiration when adopting a rootstock with a different drought tolerance...
April 27, 2018: Journal of Plant Physiology
https://www.readbyqxmd.com/read/29783054/application-of-indices-to-evaluate-lid-facilities-for-sediment-and-heavy-metal-removal
#14
Sher Bahadur Gurung, Franz Kevin Geronimo, Jungsun Hong, Lee-Hyung Kim
Heavy metal and sediments transported from the urban catchment are the prime interest among researchers these days due to its toxic behaviour and hazardous effect on the animals, plants and human. The inflow from urban catchments and outflow from the Low impact development technologies (LID) were evaluated using different types of indices. Indices like fd , fp and Kd showed that heavy metals like Pb, Cd and Ni were dominantly observed in the dissolved form. These metals possess higher threat to the water bodies receiving urban runoff without any treatments...
May 14, 2018: Chemosphere
https://www.readbyqxmd.com/read/29783046/bacterial-community-of-industrial-raw-sausage-packaged-in-modified-atmosphere-throughout-the-shelf-life
#15
Stefano Raimondi, Maria Rosaria Nappi, Tiziana Maria Sirangelo, Alan Leonardi, Alberto Amaretti, Alessandro Ulrici, Rudy Magnani, Chiara Montanari, Giulia Tabanelli, Fausto Gardini, Maddalena Rossi
Ten lots of industrial raw sausages in modified atmosphere (CO2 30%, O2 70%), produced in the same plant over 7 months, were analyzed at the day after production (S samples) and at the end of shelf life (E samples), after 12 days storage at 7 °C to simulate thermal abuse. Quality of the products was generally compromised by storage at 7 °C, with only 3 E samples without alterations. During the shelf life, the pH decreased for the accumulation of acetic and lactic acids. A few biogenic amines accumulated, remaining below acceptable limits...
April 28, 2018: International Journal of Food Microbiology
https://www.readbyqxmd.com/read/29783033/coordination-of-symbiosis-and-cell-cycle-functions-in-sinorhizobium-meliloti
#16
REVIEW
Shuanghong Xue, Emanuele G Biondi
The symbiotic nitrogen fixing species Sinorhizobium meliloti represents a remarkable model system for the class Alphaproteobacteria, which includes genera such as Caulobacter, Agrobacterium and Brucella. It is capable of living free in the soil, and is also able to establish a complex symbiosis with leguminous plants, during which its cell cycle program is completely rewired presumably due, at least in part, to the action of peptides secreted by the plant. Here we will discuss how the cell cycle regulation works in S...
May 18, 2018: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/29783017/the-hydro-ethanolic-extract-of-acacia-seyal-mimosaceae-stem-barks-induced-death-in-an-er-negative-breast-cancer-cell-line-by-the-intrinsic-pathway-of-apoptosis-and-inhibited-cell-migration
#17
Stephane Zingue, Thomas Michel, Julia Cisilotto, Alain Brice Tueche, Derek Tantoh Ndinteh, Leônidas João Mello, Dieudonné Njamen, Tânia Beatriz Creczynski-Pasa
BACKGROUND: Despite the significant developments occurring in the treatment of cancer, it still remains the second deadly disease, responsible for 8.2 million deaths every year. Various natural substances have been studied for active molecules of tumor suppression in the past and the tropical flora, by its diversity, continues to provide new antitumor drugs. Acacia seyal is a plant used in Cameroonian traditional system to treat cancer. It exhibited cytotoxic effects towards human breast adenocarcinoma cells...
May 18, 2018: Journal of Ethnopharmacology
https://www.readbyqxmd.com/read/29782981/cationic-starch-safe-and-economic-harvesting-flocculant-for-microalgal-biomass-and-inhibiting-e-coli-growth
#18
Mehrez E E El-Naggar, Farag A Samhan, Abeer A A Salama, Rehab M Hamdy, Gamila H Ali
Cationized starch-based flocculation processes are the subject of increasing attention because of their non-toxicity, biodegradability and relatively low price synthesized. The study aimed to evaluate the flocculability of different cationic starches using different concentrations of glycidyltrimethylammonium chloride (GTAC) with different degree of substitution (DS) ranged from 0.13 to 0.57. Cationized starch were characterized using Fourier Transform Infrared (FTIR), scanning electron microscopy (SEM) and toxicity checked using experimental animal procedure...
May 18, 2018: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29782932/resin-flow-in-conifers
#19
Paulo Cabrita
Resins are plant exudates of economic importance used by plants as defence. They flow out of resin ducts, open and long tube-like intercellular spaces lined by a layer of specialized parenchyma cells, called the epithelium, which secrete resin into the duct lumen. A model that describes resin flow in conifers is presented to investigate how duct structure, resin loading, crystallization, and viscosity affect flow and could explain differences between species. Considering resin viscosity, the structure of resin ducts, and a pressure-driven resin loading through the duct wall, the unsteady Stokes equation was applied...
May 18, 2018: Journal of Theoretical Biology
https://www.readbyqxmd.com/read/29782822/simultaneous-determination-of-intestinal-permeability-and-potential-drug-interactions-of-complex-mixtures-using-caco-2-cells-and-high-resolution-mass-spectrometry-studies-with-rauwolfia-serpentina-extract
#20
Thomas J Flynn, Sanah N Vohra
Caco-2 cells are a commonly used model for estimating the intestinal bioavailability of single chemical entity pharmaceuticals. Caco-2 cells, when induced with calcitriol, also express other biological functions such as phase I (CYP) and phase II (glucuronosyltransferases) drug metabolizing enzymes which are relevant to drug-supplement interactions. Intestinal bioavailability is an important factor in the overall safety assessment of products consumed orally. Foods, including herbal dietary supplements, are complex substances with multiple chemical components...
May 18, 2018: Chemico-biological Interactions
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