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https://www.readbyqxmd.com/read/28732430/bee-pollen-flavonoids-as-a-therapeutic-agent-in-allergic-and-immunological-disorders
#1
Masoomeh Jannesar, Maryam Sharif Shoushtari, Ahmad Majd, Zahra Pourpak
Bee pollen grains, as the male reproductive part of seed-bearing plants contain considerable concentrations of various phytochemicals and nutrients. Since antiquity, people throughout the world used pollens to cure colds, flu, ulcers, premature aging, anemia and colitis. It is now well-documented that some bee pollen secondary metabolites (e.g. flavonoid) may have positive health effects. In recent years, the flavonoids have attracted much interest because of their wide range of biological properties and their beneficial effects on human health...
June 2017: Iranian Journal of Allergy, Asthma, and Immunology
https://www.readbyqxmd.com/read/28732338/toxic-organic-substances-and-marker-compounds-in-size-segregated-urban-particulate-matter-implications-for-involvement-in-the-in%C3%A2-vitro-bioactivity-of-the-extractable-organic-matter
#2
Athanasios Besis, Alexandra Tsolakidou, Dimitra Balla, Constantini Samara, Dimitra Voutsa, Anastasia Pantazaki, Theodora Choli-Papadopoulou, Theodore S Lialiaris
Toxic organic substances and polar organic marker compounds, i.e. polychlorinated biphenyls (PCBs), organochlorine pesticides (OCPs), polybrominated diphenyl ethers (PBDEs), polycyclic aromatic hydrocarbons (PAHs) and their nitro-derivatives (N-PAHs), as well as dicarboxylic acids (DCAs) and sugars/sugar anhydrites (S/SAs) were analyzed in size-segregated PM samples (<0.49, 0.49-0.97, 0.97-3 and >3 μm) collected at two urban sites (urban traffic and urban background) during the cold and the warm season...
July 18, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28731905/validation-of-the-prognostic-kidney-donor-risk-index-kdri-scoring-system-of-deceased-donors-for-renal-transplantation-in-the-netherlands
#3
Hessel Peters-Sengers, Martin B A Heemskerk, Ronald B Geskus, Jesper Kers, Jaap J Homan van der Heide, Stefan P Berger, Frederike J Bemelman
BACKGROUND: The prognostic Kidney Donor Risk Index (KDRI)-developed and internally validated in the US-is a widely-used tool to predict transplant outcome of a deceased donor kidney. The KDRI is currently used for longevity matching between donors and recipients in the US. METHODS: We aimed to externally validate the KDRI as proposed by Rao et al, (2009) containing 10 donor factors (KDRIdonor-only) and 1 with 4 additional transplant factors (KDRIfull), with stratification on recipient age and diabetes...
July 21, 2017: Transplantation
https://www.readbyqxmd.com/read/28731827/convergence-consilience-and-the-evolution-of-temperate-deciduous-forests
#4
Erika J Edwards, David S Chatelet, Bo-Chang Chen, Jin Yao Ong, Shuichiro Tagane, Hironobu Kanemitsu, Kazuki Tagawa, Kentaro Teramoto, Brian Park, Kuo-Fang Chung, Jer-Ming Hu, Tetsukazu Yahara, Michael J Donoghue
The deciduous habit of northern temperate trees and shrubs provides one of the most obvious examples of convergent evolution, but how did it evolve? Hypotheses based on the fossil record posit that deciduousness evolved first in response to drought or darkness and preadapted certain lineages as cold climates spread. An alternative is that evergreens first established in freezing environments and later evolved the deciduous habit. We monitored phenological patterns of 20 species of Viburnum spanning tropical, lucidophyllous (subtropical montane and warm temperate), and cool temperate Asian forests...
August 2017: American Naturalist
https://www.readbyqxmd.com/read/28731766/observing-dissipative-topological-defects-with-coupled-lasers
#5
Vishwa Pal, Chene Tradonsky, Ronen Chriki, Asher A Friesem, Nir Davidson
Topological defects have been observed and studied in a wide range of systems, such as cosmology, spin systems, cold atoms, and optics, as they are quenched across a phase transition into an ordered state. These defects limit the coherence of the system and its ability to approach a fully ordered state, so revealing their origin and control is becoming an increasingly important field of research. We observe dissipative topological defects in a one-dimensional ring of phased-locked lasers, and show how their formation is related to the Kibble-Zurek mechanism and is governed in a universal manner by two competing time scales...
July 7, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/28731682/cold-adaptation-of-triosephosphate-isomerase
#6
Johan Åqvist
The main problem for enzymes from psychrophilic species, that need to work near the freezing point of liquid water, is the exponential decay of reaction rates as the temperature is lowered. Cold-adapted enzymes have solved this problem by shifting the activation enthalpy-entropy balance for the catalyzed reaction compared to their mesophilic orthologs. To understand the structural basis of this universal feature it is necessary to examine pairs of such orthologous enzymes, with known 3D structures, at the microscopic level...
July 21, 2017: Biochemistry
https://www.readbyqxmd.com/read/28731217/small-rnas-in-regulating-temperature-stress-response-in-plants
#7
Qing Liu, Shijuan Yan, Tifeng Yang, Shaohong Zhang, Yue-Qin Chen, Bin Liu
Due to global climate change, temperature stress has become one of the primary causes of crop losses worldwide. Much progress has been made in unraveling the complex stress response mechanisms in plants, particularly in the identification of temperature stress responsive protein-coding genes. Recently discovered microRNAs (miRNAs) and endogenous small-interfering RNAs (siRNAs) have also been demonstrated as important players in plant temperature stress response. Using high-throughput sequencing, many small RNAs, especially miRNAs, have been identified to be triggered by cold or heat...
July 21, 2017: Journal of Integrative Plant Biology
https://www.readbyqxmd.com/read/28730739/effect-of-the-age-of-broodstock-males-on-sperm-function-during-cold-storage-in-the-trout-oncorhynchus-mykiss
#8
J Risopatrón, O Merino, C Cheuquemán, E Figueroa, R Sánchez, J G Farías, I Valdebenito
The knowledge of sperm quality in the broodstock males of different ages is a prerequisite to identify the reproductive ability of cultivated fish for the hatchery management. Thus, in this work, we analysed sperm function of the semen stored of broodstock males of rainbow trout (Oncorhychus mykiss) in different reproductive ages (2, 3 and 4 years old). Sperm samples of each reproductive age were stored in Storfish(®) during 10 days at 4°C, and then, motility, viability, mitochondrial function (MMP), superoxide anion (O2-) level and DNA fragmentation (DNAfrag ) were assessed...
July 21, 2017: Andrologia
https://www.readbyqxmd.com/read/28730713/investigation-of-genetic-diversity-and-inbreeding-in-a-japanese-native-horse-breed-for-suggestions-on-its-conservation
#9
Akio Onogi, Kouichi Shirai, Tomoko Amano
Because native breeds can serve as genetic resources for adapting to environment changes, their conservation is important for future agroecosystems. Using pedigree analysis, we investigated genetic diversity and inbreeding in Japanese Hokkaido native horses, which have adapted to a cold climate and roughage diet. Genetic diversity was measured as the number of founders and the effective number of founders, ancestors and genomes. All metrics imply a decrease in genetic diversity. A comparison of these metrics suggested that pedigree bottlenecks contributed more than did random gene losses to the reduction of genetic diversity...
July 21, 2017: Animal Science Journal, Nihon Chikusan Gakkaihō
https://www.readbyqxmd.com/read/28730413/updating-the-elite-rice-variety-kongyu-131-by-improving-the-gn1a-locus
#10
Xiaomin Feng, Chen Wang, Jianzong Nan, Xiaohui Zhang, Rongsheng Wang, Guoqiang Jiang, Qingbo Yuan, Shaoyang Lin
BACKGROUND: Kongyu 131 is an elite japonica rice variety of Heilongjiang Province, China. It has the characteristics of early maturity, superior quality, high yield, cold tolerance and wide adaptability. However, there is potential to improve the yield of Kongyu 131 because of the relatively few grains per panicle compared with other varieties. Hence, we rebuilt the genome of Kongyu 131 by replacing the GRAIN NUMBER1a (Gn1a) locus with a high-yielding allele from a big panicle indica rice variety, GKBR...
December 2017: Rice
https://www.readbyqxmd.com/read/28730368/safety-of-cold-polypectomy-for-small-colorectal-neoplastic-lesions-a-prospective-cohort-study-in-japan
#11
Yuichi Shimodate, Motowo Mizuno, Rio Takezawa, Mami Kobayashi, Tatsuhiro Yamazaki, Akira Doi, Naoyuki Nishimura, Hirokazu Mouri, Kazuhiro Matsueda, Hiroshi Yamamoto
BACKGROUND: Cold polypectomy has been widely accepted for removal of small colorectal polyps. However, no large-scale prospective study exists as for its safety in Japan. We investigated this issue in this single-center, prospective cohort study in a total of 1198 colorectal polyps resected with cold polypectomy. PATIENTS AND METHODS: Four hundred and seventy-four patients who underwent cold polypectomy for colorectal neoplastic lesions less than 10-mm diameter between September 2014 and October 2016 were enrolled...
July 20, 2017: International Journal of Colorectal Disease
https://www.readbyqxmd.com/read/28729869/genetic-patterns-of-myrceugenia-correifolia-a-rare-species-of-fog-dependent-forests-of-mediterranean-chile-is-it-a-climatic-relict
#12
Fernanda Pérez, Luis F Hinojosa, Gioconda Peralta, Paz Montenegro, Carla Irarrázabal, Michel Cossio
Rare species frequently occur in areas with microclimatic conditions that are atypical for their regions, but that were more common in the past, and that probably have operated as climatic refugia for a long time. Myrceugenia correifolia is a rare arboreal species that grows in deep canyons and hilltops of the Coast Range of north-central Chile between 30° and 35°S. In the northern edge of its distribution M. correifolia grows in small patches of fog-dependent forest surrounding by xeric vegetation. These forest formations are thought to be remnants of an ancient and continuous rainforest that according to some authors became fragmented during aridization of the Neogene (Neogene relict) and to others during warm-dry cycles of the Pleistocene (glacial relicts)...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28729864/synechococcus-assemblages-across-the-salinity-gradient-in-a-salt-wedge-estuary
#13
Xiaomin Xia, Wang Guo, Shangjin Tan, Hongbin Liu
Synechococcus are the most abundant and widely distributed picocyanobacteria in the ocean. The salt-wedge type of estuary possesses the complete horizontal and vertical gradient of salinity together with other physical and chemical parameters. In order to reveal whether such a complex environmental gradient harbors a high diversity of Synechococcus, we investigated the abundance, taxonomic composition and pigment genetic diversity of Synechococcus in surface and bottom waters across the salinity gradient in a salt-wedge estuary by flow cytometric analysis and pyrosequencing of the rpoC1 gene and cpcBA operon (encoding phycocyanin)...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28729391/edward-f-adolph-distinguished-lecture-skin-deep-insights-into-vascular-aging
#14
W Larry Kenney
The skin is an accessible model circulation for studying vascular function and dysfunction across the lifespan. Age-related changes, as well as those associated with disease progression, often appear first in the cutaneous circulation. Further, impaired vascular signaling and attendant endothelial dysfunction -- one of the earliest indicators of cardiovascular pathogenesis -- occurs in a similar fashion across multiple tissue beds throughout the body including the skin. Because microvascular dysfunction is a better predictor of long term outcomes and adverse cardiovascular events than is large vessel disease, understanding age-associated changes in the control of the human cutaneous microcirculation is important...
July 20, 2017: Journal of Applied Physiology
https://www.readbyqxmd.com/read/28728379/effects-of-dietary-glutamine-and-arginine-supplementation-on-performance-intestinal-morphology-and-ascites-mortality-in-broiler-chickens-reared-under-cold-environment
#15
Rahim Abdulkarimi, Mohammad Hossien Shahir, Mohsen Daneshyar
Objective: An experiment was conducted to evaluate the effects of dietary glutamine (Gln) and arginine (Arg) supplementation on performance, intestinal morphology and ascites mortality in broilers. Methods: A total of 675 day old chicks were randomly allocated to 9 experimental groups in a 3×3 factorial arrangement based on a completely randomized design with 5 replicates of 15 chicks. Three levels of dietary Gln (0, 0.5 and 1%) and Arg (100, 130% and 160% of Ross recommendation) supplementation were used in ascites inducing condition (15±1 ˚C) from 7 to 42 days of age...
June 26, 2017: Asian-Australasian Journal of Animal Sciences
https://www.readbyqxmd.com/read/28728082/oral-infections-comorbidities-and-sensory-evidences-in-elderly-cross-sectional-study
#16
Nathalia Santos Viana Silva, Luciana Alvarenga da Silva, Omar Jaluul, Wilson Jacob-Filho, Silvia Regina Dowgan Tesseroli de Siqueira
BACKGROUND: Oral infections affect the general health and overlap with chronic diseases due to infectious-immune mechanisms. On the other side, sensory abnormalities may be symptoms of this association. OBJECTIVE: To evaluate the prevalence of oral infections, comorbidities, health parameters and sensory abnormalities in elderly patients. METHODS: Thirty (30) elderly with mean age 70.4 yo, distributed according to ages were evaluated with a protocol that included demographics, comorbidities, medications, laboratory tests, blood pressure, heart rate, mini-mental state examination, clinical oral evaluation and systematized sensory testing (gustative, olfactory, thermal, mechanical and pain thresholds)...
July 1, 2017: Archives of Gerontology and Geriatrics
https://www.readbyqxmd.com/read/28727981/engaging-cold-to-upregulate-cell-proliferation-in-alginate-encapsulated-liver-spheroids
#17
Peter Kilbride, Krishnaa T Mahbubani, Kourosh Saeb-Parsy, George John Morris
For many years, the impact of hyper- and hypothermia on mammalian cells has been examined. With the exception of short, low temperature storage, which has uses in areas such as preservation for transplantation or regenerative medicine, advantages for the use of low temperature treatment in hepatocytes have not been previously reported. We have observed that alginate-encapsulated HepG2 liver spheroids that are cryopreserved or experience a cold reduction in temperature (≤10°C) for periods between 1 and 90 min display an enhanced cell proliferation during culture 7-16 days post-treatment compared with untreated samples...
July 20, 2017: Tissue Engineering. Part C, Methods
https://www.readbyqxmd.com/read/28727811/factors-limiting-sulfolane-biodegradation-in-contaminated-subarctic-aquifer-substrate
#18
Christopher P Kasanke, Mary Beth Leigh
Sulfolane, a water-soluble organosulfur compound, is used industrially worldwide and is associated with one of the largest contaminated groundwater plumes in the state of Alaska. Despite being widely used, little is understood about the degradation of sulfolane in the environment, especially in cold regions. We conducted aerobic and anaerobic microcosm studies to assess the biological and abiotic sulfolane degradation potential of contaminated subarctic aquifer groundwater and sediment from Interior Alaska...
2017: PloS One
https://www.readbyqxmd.com/read/28727798/cloning-and-expression-of-genes-encoding-heat-shock-proteins-in-liriomyza-trifolii-and-comparison-with-two-congener-leafminer-species
#19
Ya-Wen Chang, Jing-Yun Chen, Ming-Xing Lu, Yuan Gao, Zi-Hua Tian, Wei-Rong Gong, Chang-Sheng Dong, Yu-Zhou Du
The polyphagous agromyzid fly, Liriomyza trifolii, is a significant and important insect pest of ornamental and vegetable crops worldwide. The adaptation of insects to different environments is facilitated by heat shock proteins (HSPs), which play an important role in acclimation to thermal stress. In this study, we cloned and characterized five HSP-encoding genes of L. trifolii (Lthsp20, Lthsp40, Lthsp60, Lthsp70, and Lthsp90) and monitored their expression under different thermal stresses using real-time quantitative PCR...
2017: PloS One
https://www.readbyqxmd.com/read/28727413/quantifying-the-metabolome-of-pseudomonas-taiwanensis-vlb120-evaluation-of-hot-and-cold-combined-quenching-extraction-approaches
#20
Gossa Garedew Wordofa, Mette Kristensen, Lars Schrübbers, Douglas McCloskey, Jochen Forster, Konstantin Schneider
Absolute quantification of free intracellular metabolites is a valuable tool in both, pathway discovery and metabolic engineering. In this study, we conducted a comprehensive examination of different hot and cold combined quenching/extraction approaches to extract and quantify intracellular metabolites of Pseudomonas taiwanensis VLB120 to provide a useful reference dataset of absolute intracellular metabolite concentrations. The suitability of commonly used metabolomics tools including pressure driven fast filtration system followed by combined quenching/extraction techniques (such as cold methanol/acetonitrile/water, hot water, boiling ethanol/water, as well as cold ethanol/water) were tested and evaluated for P...
July 20, 2017: Analytical Chemistry
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