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https://www.readbyqxmd.com/read/29777196/single-measurement-detection-of-individual-cell-ionic-oscillations-using-an-n-type-semiconductor-electrolyte-interface
#1
Mariusz Pietruszka, Monika Olszewska, Lukasz Machura, Edward Rówiński
Pollen tubes are used as models in studies on the type of tip-growth in plants. They are an example of polarised and rapid growth because pollen tubes are able to quickly invade the flower pistil in order to accomplish fertilisation. How different ionic fluxes are perceived, processed or generated in the pollen tube is still not satisfactorily understood. In order to measure the H+ , K+ , Ca2+ and Cl- fluxes of a single pollen tube, we developed an Electrical Lab on a Photovoltaic-Chip (ELoPvC) on which the evolving cell was immersed in an electrolyte of a germination medium...
May 18, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29776336/phylogenomic-analysis-of-apoidea-sheds-new-light-on-the-sister-group-of-bees
#2
Manuela Sann, Oliver Niehuis, Ralph S Peters, Christoph Mayer, Alexey Kozlov, Lars Podsiadlowski, Sarah Bank, Karen Meusemann, Bernhard Misof, Christoph Bleidorn, Michael Ohl
BACKGROUND: Apoid wasps and bees (Apoidea) are an ecologically and morphologically diverse group of Hymenoptera, with some species of bees having evolved eusocial societies. Major problems for our understanding of the evolutionary history of Apoidea have been the difficulty to trace the phylogenetic origin and to reliably estimate the geological age of bees. To address these issues, we compiled a comprehensive phylogenomic dataset by simultaneously analyzing target DNA enrichment and transcriptomic sequence data, comprising 195 single-copy protein-coding genes and covering all major lineages of apoid wasps and bee families...
May 18, 2018: BMC Evolutionary Biology
https://www.readbyqxmd.com/read/29775568/neonicotinoids-decrease-sucrose-responsiveness-of-honey-bees-at-first-contact
#3
Fabien J Démares, Christian W W Pirk, Susan W Nicolson, Hannelie Human
For two decades, neonicotinoid insecticides have been extensively used worldwide. Targeting neuronal receptors, they have deleterious effects on the behaviour and physiology of many of many beneficial as well as harmful insects. Bees are exposed to these insecticides in pollen and nectar while providing pollination services to agricultural crops, and neonicotinoids have been shown to impair navigation by bees and to decrease their foraging activity. We have previously reported the effect of dietary thiamethoxam on sucrose responsiveness of young worker bees...
May 15, 2018: Journal of Insect Physiology
https://www.readbyqxmd.com/read/29775012/-the-clinical-value-of-china-savin-pollen-extract-used-for-skin-prick-test
#4
Kai Guan, J X Zhou, R Q Wang, J Yin, L L Wang, Y X Zhi, J L Sun, H Li, L P Wen, J Q Gu, R Tang, Z X Wang, L S Li, T Xu
Objective: The aim of this study is to evaluate the effectiveness and safety of China Savin pollen extract which was used for skin prick test (SPT) in the diagnosis of China Savin pollen allergy. Method: Patients with diagnosis of allergic diseases were collected from Allergy Department of Peking Union Medical College Hospital. All patients were given SPT with China Savin pollen extract, and the mean wheal diameter (MWD) was measured after 15 minutes. Receiver operating characteristic curve (ROC) analysis was performed based on the results of serum specific immunoglobulin E (sIgE)...
February 2018: Journal of Clinical Otorhinolaryngology, Head, and Neck Surgery
https://www.readbyqxmd.com/read/29773615/microbial-diversity-in-commercial-bee-pollen-from-europe-chile-and-mexico-based-on-16s-rrna-gene-amplicon-metagenome-sequencing
#5
Vicente D Moreno Andrade, Carlos Saldaña Gutiérrez, Rosa P Calvillo Medina, Andrés Cruz Hérnandez, Moisés A Vázquez Cruz, Alfonso Torres Ruíz, Sergio Romero Gómez, Miguel A Ramos López, Erika Álvarez-Hidalgo, Silvia B López-Gaytan, Natanahel Salvador Ramírez, George H Jones, Jose Luis Hernandez-Flores, Juan Campos-Guillén
Bee pollen is a highly nutritive natural foodstuff. Because of its use as a comestible, the association of bacteria with bee pollen is commercially and biologically important. We report here the bacterial diversity of seven bee pollen samples (five from Europe, one from Chile, and one from Mexico) based on 16S rRNA gene amplicon metagenome sequencing.
May 17, 2018: Genome Announcements
https://www.readbyqxmd.com/read/29772515/simultaneous-determination-of-nine-neonicotinoids-in-human-urine-using-isotope-dilution-ultra-performance-liquid-chromatography-tandem-mass-spectrometry
#6
Quan Zhang, Ximing Wang, Zhe Li, Hangbiao Jin, Zhengbiao Lu, Chang Yu, Yu-Fang Huang, Meirong Zhao
Neonicotinoids (neonics), a class of systemic insecticides, have been frequently detected in pollen, vegetables, and fruits. Recently, an increasing concern has been aroused for human exposure to neonics. However, biological monitoring for quantifying body burden of neonics has rarely been reported. In this study, we developed an isotope-dilution ultra-high performance liquid chromatography coupled with tandem mass spectrometry (UPLC-MS/MS) method to simultaneously quantify nine neonics, including acetamiprid (ACE), thiamethoxam (THIAM), imidacloprid (IMIP), clothianidin (CLO), flonicamid (FLO), thiacloprid (THIAC), dinotefuran (DIN), nitenpyram (NIT), and imidaclothiz (IMIT) in urine...
May 14, 2018: Environmental Pollution
https://www.readbyqxmd.com/read/29771037/-association-between-airborne-pollen-distribution-and-allergic-diseases-in-beijing-urban-area
#7
X Y Wang, Z M Tian, H Y Ning, X Y Wang
Objective: The aim of this study is to investigate the impact of airborne pollen in urban Beijing area on the consultation rate of allergic diseases. Method: A modified pollen sampler was used to monitor the distribution of main airborne pollen during Jan 1st 2015 to Dec 31 2015.The consultation rate of allergic rhinitis and asthma was obtained meanwhile among allergy, ENT and pneumology department. Relationship between pollen and consultation rate was analyzed by Pearson index. Result: ①Through the whole year of 2015 the total quantity of pollens amounted to 76164 grains...
May 20, 2017: Journal of Clinical Otorhinolaryngology, Head, and Neck Surgery
https://www.readbyqxmd.com/read/29770982/characterisation-of-phenolic-compounds-by-uplc-qtof-ms-ms-of-geopropolis-from-the-stingless-bee-melipona-subnitida-janda%C3%A3-ra
#8
Silvana Alves de Souza, Telma Maria Guedes da Silva, Eva Monica Sarmento da Silva, Celso Amorim Camara, Tania Maria Sarmento Silva
INTRODUCTION: Melipona subnitida Ducke (jandaíra) is a stingless bee native to north-eastern Brazil, which produces geopropolis, a mixture of beeswax, plant resins, pollens and earth that is used for sealing beehives. OBJECTIVE: To extend the knowledge on phenolic compounds in fractions obtained by C18-solid phase extraction (SPE) of nine geopropolis samples from Melipona subnitida collected at different times. METHODOLOGY: Chromatographic profiles of nine samples of geopropolis from jandaíra were analysed by ultra-performance liquid chromatography coupled with a diode array detector and quadrupole time-of-flight mass spectrometry (UPLC-DAD-QTOF-MS/MS) and combined with the use of data-independent acquisition (MSE) for the profiling and structural characterisation of the phenolic compounds...
May 17, 2018: Phytochemical Analysis: PCA
https://www.readbyqxmd.com/read/29770588/trends-in-the-prescribing-of-topical-nasal-agents-using-an-nhs-england-data-base
#9
Haroon Shakeel Saeed, Rosie B Wright, Samit Kumar Ghosh
OBJECTIVES: Our aim is to present data depicting geographical prescribing trends and expenditure related to topical nasal agent prescriptions across clinical commissioning groups (CCG's) in England. We assess if prescribing trends can act as a surrogate marker for allergic rhinitis (AR) and rhinosinusitis disease burden (RS). DESIGN: NHS England primary care prescriptions dispensed for topical drugs used in nasal allergy (BNF chapter 12.2.1) were accessed using OpenPrescribing beta software...
May 16, 2018: Clinical Otolaryngology
https://www.readbyqxmd.com/read/29770209/cell-specific-cis-natural-antisense-transcripts-cis-nats-in-the-sperm-and-the-pollen-vegetative-cells-of-arabidopsis-thaliana
#10
Peng Qin, Ann E Loraine, Sheila McCormick
Background: cis-NATs ( cis-natural antisense transcripts ) are transcribed from opposite strands of adjacent genes and have been shown to regulate gene expression by generating small RNAs from the overlapping region. cis-NATs are important for plant development and resistance to pathogens and stress. Several genome-wide investigations identified a number of cis-NAT pairs, but these investigations predicted cis-NATS using expression data from bulk samples that included lots of cell types. Some cis-NAT pairs identified from those investigations might not be functional, because both transcripts of cis-NAT pairs need to be co-expressed in the same cell...
2018: F1000Research
https://www.readbyqxmd.com/read/29769581/a-grazing-gomphotherium-in-middle-miocene-central-asia-10-million-years-prior-to-the-origin-of-the-elephantidae
#11
Yan Wu, Tao Deng, Yaowu Hu, Jiao Ma, Xinying Zhou, Limi Mao, Hanwen Zhang, Jie Ye, Shi-Qi Wang
Feeding preference of fossil herbivorous mammals, concerning the coevolution of mammalian and floral ecosystems, has become of key research interest. In this paper, phytoliths in dental calculus from two gomphotheriid proboscideans of the middle Miocene Junggar Basin, Central Asia, have been identified, suggesting that Gomphotherium connexum was a mixed feeder, while the phytoliths from G. steinheimense indicates grazing preference. This is the earliest-known proboscidean with a predominantly grazing habit...
May 16, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29769472/-evaluation-of-the-effectiveness-of-subcutaneous-immunotherapy-using-birch-pollen-extract-for-pollen-food-allergy-syndrome
#12
Shuntaro Tsumagari, Satomi Mori, Hiroko Ishizu, Yutaka Tanaka, Yoshihisa Okamoto, Kazuyuki Kurihara
BACKGROUNDS: Recently, patients with oral allergy syndrome (OAS) to fruits or vegetables caused by pollenfood allergy syndrome (PFAS) have increased nationwide. We examined effectiveness of SCIT using birch pollen extract for PFAS. METHODS: A total of 19 patients (9 male and 10 female) underwent SCIT with birch pollen extract from August 2011 to August 2016. Rush schedule was used for the initial updosing for SCIT in a hospital setting. In maintenance phase, SCIT was administered every 4-8 weeks on an outpatient basis...
2018: Arerugī, [Allergy]
https://www.readbyqxmd.com/read/29768495/pollen-analysis-of-australian-honey
#13
J M Kale Sniderman, Kia A Matley, Simon G Haberle, David J Cantrill
Pollen analysis is widely used to verify the geographic origin of honeys, but has never been employed in Australia. In this study, we analysed the pollen content of 173 unblended honey samples sourced from most of the commercial honey producing regions in southern Australia. Southern Australian vegetation is dominated by Eucalyptus (Myrtaceae) forests and, as expected, most Australian honeys are palynologically dominated by Eucalyptus, while other important components include Myrtaceae taxa such as Corymbia/Angophora and the tribe Leptospermeae; plus Brassicaceae, Echium, Macadamia, and Acacia...
2018: PloS One
https://www.readbyqxmd.com/read/29768274/reliability-of-a-new-symptom-score-in-a-titrated-quantitative-conjunctival-provocation-test-supported-by-an-objective-photodocumentation
#14
Oliver Pfaar, Dan Philipp Claßen, Anatoli Astvatsatourov, Ludger Klimek, Ralph Mösges
BACKGROUND: Allergen provocation tests are useful methods for proving the clinical relevance of an allergen-specific sensitization. Among these methods, the conjunctival provocation test (CPT) represents an easy-to-use tool. However, its readout parameters have not yet been internationally standardized or validated. Photodocumentation has been shown as a good option for objectifying a CPT reaction, supporting the local investigator assessment. Based on test-retest reliability of the score and an objective digital photoanalysis of the conjunctival redness, this study aimed to prove the reproducibility of a new CPT scoring system for use in clinical trials (ClinicalTrials...
May 16, 2018: International Archives of Allergy and Immunology
https://www.readbyqxmd.com/read/29768058/taishan-pinus-massoniana-pollen-polysaccharides-enhance-immune-responses-in-chickens-infected-by-avian-leukosis-virus-subgroup-b
#15
Shifa Yang, Guiming Li, Zengcheng Zhao, Zhongli Huang, Jian Fu, Minxun Song, Shuqian Lin, Ruiliang Zhu
Immunosuppressive virus, which can cause suppressed immunity and vaccination failure, frequently occurs in chicken flocks and seriously destroys the poultry industry. Our previous studies have reported that Taishan Pinus massoniana pollen polysaccharide (TPPPS) possess immunomodulatory effects and improve the immune effects of vaccines. In this study, avian leukosis virus subgroup B (ALV-B) was chosen as immunosuppressive virus to artificially establish immunosuppressive models in chickens, and the immune modulatory ability of TPPPS on the immune response of chickens was evaluated...
May 16, 2018: Immunological Investigations
https://www.readbyqxmd.com/read/29766507/abscisic-acid-prevents-pollen-abortion-under-high-temperature-stress-by-mediating-sugar-metabolism-in-rice-spikelets
#16
Md Rezaul Islam, Baohua Feng, Tingting Chen, Weimeng Fu, Caixia Zhang, Longxing Tao, Guanfu Fu
Heat stress at the pollen mother cell (PMC) meiotic stage leads to pollen sterility in rice, in which the reactive oxygen species (ROS) and sugar homeostasis are always adversely affected. This damage is reversed by abscisic acid (ABA), but the mechanisms underlying the interactions among the ABA, sugar metabolism, ROS and heat shock proteins (HSPs) in rice spikelets under heat stress are unclear. Two rice genotypes, Zhefu802 (a recurrent parent) and fgl (its near-isogenic line) were subjected to heat stress of 40°C after pre-foliage sprayed with ABA and its biosynthetic inhibitor fluridone at the meiotic stage of PMC...
May 16, 2018: Physiologia Plantarum
https://www.readbyqxmd.com/read/29766006/interaction-between-air-pollutants-and-pollen-grains-the-role-on-the-rising-trend-in-allergy
#17
Farnaz Sedghy, Abdol-Reza Varasteh, Mojtaba Sankian, Malihe Moghadam
Asthma and allergic diseases cases have risen in recent decades. Plant pollen is considered as the main aeroallergen causing allergic reactions. According to available data, urban residents experience more respiratory allergies than rural residents mainly due to the interaction between chemical air pollutants and pollen grains. This interaction can occur through several mechanisms; chemical pollutants might facilitate pollen allergen release, act as adjuvants to stimulate IgE-mediated responses, modify allergenic potential, and enhance the expression of some allergens in pollen grains...
April 2018: Reports of Biochemistry & Molecular Biology
https://www.readbyqxmd.com/read/29765587/variation-in-the-degree-of-reciprocal-herkogamy-affects-the-degree-of-legitimate-pollination-in-a-distylous-species
#18
Xian-Feng Jiang, Xing-Fu Zhu, Qing-Jun Li
Distyly is a widespread floral polymorphism characterized by the flowers within a population showing reciprocal placement of the anthers and stigma. Darwin hypothesizes that distyly evolves to promote precise pollen transfer between morphs. Primula chungensis exhibits two types of anther heights, and these two types of anthers show pollen of two different size classes. To understand whether the stigma could capture more pollen grains from the anthers of the pollen donor as the separation between the stigma of pollen receiver and the anther of pollen donor decreased, the present research assessed the source of the pollen load in a series of open-pollinated flowers with continuous variation of style lengths...
June 2018: AoB Plants
https://www.readbyqxmd.com/read/29763520/the-arabidopsis-crrlk1l-protein-kinases-bups1-and-bups2-are-required-for-normal-growth-of-pollen-tubes-in-the-pistil
#19
Lei Zhu, Liang-Cui Chu, Yan Liang, Xue-Qin Zhang, Li-Qun Chen, De Ye
In flowering plants, the interaction of pollen tubes with female tissues is important for the accomplishment of double fertilization. Little is known about the mechanisms that underlie signalling between pollen tubes and female tissues. In this study, two Arabidopsis pollen tube-expressed CrRLK1L protein kinases, Buddha's Paper Seal 1 (BUPS1) and BUPS2, were identified as being required for normal tip growth of pollen tubes in the pistil. They are expressed prolifically in pollen and pollen tubes and are localized on the plasma membrane of the pollen tube tip region...
May 15, 2018: Plant Journal: for Cell and Molecular Biology
https://www.readbyqxmd.com/read/29762586/subdiffraction-limited-second-harmonic-photoacoustic-microscopy-based-on-nonlinear-thermal-diffusion
#20
Zhenhui Zhang, Yujiao Shi, Sihua Yang, Da Xing
We have developed a second harmonic photoacoustic microscopy (SH-PAM) for subdiffraction-limited imaging based on nonlinear thermal diffusion. When a sine-modulated Gaussian temperature field is introduced by a laser beam, the temperature dependence of the thermal diffusivity induces a nonlinear photoacoustic (PA) effect and thus results in the production of second harmonic PA signals. We demonstrate through both simulation and experiment that the second harmonic PA images can be reconstructed with a lateral resolution exceeding that of conventional optical resolution PA microscopy...
May 15, 2018: Optics Letters
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