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Guirong Tang, Qiong Li, Shenghui Xing, Ningning Li, Zheng Tang, Liangliang Yu, Junhui Yan, Xuan Li, Li Luo
Agrobacterium tumefaciens infects and causes crown galls in dicot plants by transferring T-DNA from the Ti plasmid to the host plant via a type IV secretion system (T4SS). This process requires appropriate environmental conditions, certain plant secretions and bacterial regulators. In our previous work, a member of the LysR family of transcriptional regulators (LsrB) in Sinorhizobium meliloti was found to modulate its symbiotic interactions with the host plant alfalfa. However, the function of its homologue in A...
March 16, 2018: Molecular Plant-microbe Interactions: MPMI
Heinz-Josef Koch, Kerrin Trimpler, Anna Jacobs, Nicol Stockfisch
In Europe, the framework for sugar beet ( Beta vulgaris L.) production was subject to considerable changes and for the future it is expected that sugar beet cultivation might concentrate around the sugar factories for economic reasons. Based on data from a national sugar beet farmers' survey and multi-year crop rotation trials, the effects of cropping interval (number of years in between two subsequent sugar beet crops) and of preceding crops on sugar yield were elucidated under current Central European management conditions...
2018: Frontiers in Plant Science
Motoki Kida, Mayuko Kubo, Tomoyuki Ujihira, Takayuki Ebata, Manabu Abe, Yoshiya Inokuchi
Observation of an excimer fluorescence in solution is proposed for detecting the encapsulation of potassium ion as opposed to other alkali ions by dibenzo-crown ethers. The scheme has been validated by ultraviolet photodissociation (UVPD) spectroscopy of dibenzo-21-crown-7 and dibenzo-24-crown-8 complexes with potassium ion, K+·DB21C7 and K+·DB24C8, performed under cold (~10 K) conditions in the gas phase and by quantum chemical calculations of the geometry and electronic structures of the complexes. Calculations suggest formation of a closely spaced excimer structure of benzene rings only for the K+·DB24C8...
March 15, 2018: Chemphyschem: a European Journal of Chemical Physics and Physical Chemistry
Hong Xiao, Jian Zhou, Xing Liu
Two new cadmium bromoplumbates [CdPb2 Br2 L2 ]n (1, L = ethylene glycol) and [CdPb6 Br6 L4 ]n (2) have been solvothermally synthesized and structurally characterized. 1 contains 1-D neutral heterometallic chains [CdPb2 Br2 L2 ]n , which are further connected via weak Pb-Br bonds, resulting in a 3-D network structure. The 3-D framework of 2 is constructed by the interconnection of a 2-D neutral layer [CdPb6 Br6 L4 ]n via weak Pb-Br bonds. The [CdPb6 Br6 L4 ]n layer is based on the linkages of dimeric [Pb2 Br4 ] units and heterometallic crown [Cd(Pb4 O4 )Br2 ] clusters containing a rare eight-membered [Pb4 O4 ] ring...
March 15, 2018: Dalton Transactions: An International Journal of Inorganic Chemistry
Yuan Wang, Zhuang Liu, Han-Yu Peng, Fan He, Lei Zhang, Yousef Faraj, Wei Wang, Xiao-Jie Ju, Rui Xie, Liang-Yin Chu
A simple device, which is equipped with a non-woven fabric filter medium on which immobilized with ion-recognizable smart hollow microgels, is developed for facile detection of trace lead(II) ions (Pb2+). The ion-recognizable smart microgels are made of poly(N-isopropylacrylamide-co-benzo-18-crown-6-acrylamide) (PNB), in which the 18-crown-6 groups act as the sensors of Pb2+ and the N-isopropylacrylamide groups act as the actuators. The PNB hollow microgels can isothermally change from a shrunk state to a swollen state in response to recognizing Pb2+ in the aqueous environment due to the electrostatic repulsion among the charged 18-crown-6/Pb2+ complex groups and the enhancement of hydrophilicity of the microgels...
March 14, 2018: Chemphyschem: a European Journal of Chemical Physics and Physical Chemistry
Sabrina L Roberti, Romina Higa, Verónica White, Theresa L Powell, Thomas Jansson, Alicia Jawerbaum
STUDY QUESTION: What are the consequences of inhibiting mTOR, the mechanistic target of rapamycin, and the peroxisome proliferator activated receptor gamma (PPARγ) and PPARδ pathways in the early post-implantation period on decidual function, embryo viability and feto-placental growth in the rat? SUMMARY ANSWER: mTOR inhibition from day 7 to day 9 of pregnancy in rats caused decidual PPARγ and PPARδ upregulation on day 9 of pregnancy and resulted in embryo resorption by day 14 of pregnancy...
March 12, 2018: Molecular Human Reproduction
M Y Tan, D Wright, A Syngelaki, R Akolekar, S Cicero, D Janga, M Singh, E Greco, A Wright, K Maclagan, L C Poon, K H Nicolaides
OBJECTIVE: To test the hypothesis that the performance of first-trimester screening for pre-eclampsia (PE) by a method that uses Bayes' theorem to combine maternal factors with biomarkers is superior to that defined by current National Institute for Health and Care Excellence (NICE) guidelines. METHODS: This was a prospective multicenter study (screening program for pre-eclampsia (SPREE)) in seven National Health Service maternity hospitals in England, of women recruited between April and December 2016...
March 14, 2018: Ultrasound in Obstetrics & Gynecology
Riaan Mulder, Rasha Medhat, Nadia Mohamed
Aim: The purpose of the study was to assess the marginal adaptation and discrepancy of SSC's. Differences in adaptation and discrepancy between the four surfaces (mesial, lingual, distal, and buccal) were evaluated. Methods: The placement of stainless steel crowns were completed on a phantom head in accordance with the clinical technique. The ideal tooth preparation was made and this 'master tooth' duplicated to achieve a sample size of 15. The stainless steel crowns were placed, trimmed, and cemented as per the clinical technique...
2018: Acta Biomaterialia Odontologica Scandinavica
Indrani Mukherjee, Ross R Large, Ross Corkrey, Leonid V Danyushevsky
The period 1800 to 800 Ma ("Boring Billion") is believed to mark a delay in the evolution of complex life, primarily due to low levels of oxygen in the atmosphere. Earlier studies highlight the remarkably flat C, Cr isotopes and low trace element trends during the so-called stasis, caused by prolonged nutrient, climatic, atmospheric and tectonic stability. In contrast, we suggest a first-order variability of bio-essential trace element availability in the oceans by combining systematic sampling of the Proterozoic rock record with sensitive geochemical analyses of marine pyrite by LA-ICP-MS technique...
March 13, 2018: Scientific Reports
Youssef H Zeidan, Joyce G Habib, Lieveke Ameye, Marianne Paesmans, Evandro de Azambuja, Richard D Gelber, Ian Campbell, Bo Nordenskjöld, Jorge Gutiérez, Michael Anderson, Ana Lluch, Michael Gnant, Aron Goldhirsch, Angelo Di Leo, David J Joseph, John Crown, Martine Piccart-Gebhart, Prudence A Francis
PURPOSE: To analyze the impact of postmastectomy radiation therapy (PMRT) for patients with T1-T2 tumors and 1 to 3 positive lymph nodes enrolled on the Breast International Group (BIG) 02-98 trial. METHODS AND MATERIALS: The BIG 02-98 trial randomized patients to receive adjuvant anthracycline with or without taxane chemotherapy. Delivery of PMRT was nonrandomized and performed according to institutional preferences. The present analysis was performed on participants with T1-T2 breast cancer and 1 to 3 positive lymph nodes who had undergone mastectomy and axillary nodal dissection...
February 6, 2018: International Journal of Radiation Oncology, Biology, Physics
Yazan Hassona, Dina Taimeh, Lamis Rajab, Crispian Scully
OBJECTIVES: To describe the oro-facial manifestations and dental management in a girl with Sanjad Sakati syndrome. CLINICAL PRESENTATION AND INTERVENTION: Facial features included microcephaly, thin lips, beaked nose, low set ears, and a retrognathic mandible. Oral examination revealed oligodontia/hypodontia, small dental arches, high arched palate, and a deep overbite and increased overjet. Oral rehabilitation involved full coverage prosthetic crowns on upper central incisors, stainless steel crowns on lower molars, and removable partial prostheses to replace missing teeth...
March 13, 2018: Medical Principles and Practice: International Journal of the Kuwait University, Health Science Centre
N Naenni, P Sahrmann, P R Schmidlin, T Attin, D B Wiedemeier, V Sapata, C H F Hämmerle, R E Jung
The aim of the present study was to evaluate whether 6-mm dental implants in the posterior segments of either jaw perform equally well in terms of clinical and radiographic outcomes when compared with 10-mm implants after 5 y of loading. Patients with single-tooth gaps in the posterior area who were scheduled for implant therapy were randomly assigned to a group receiving either a 6- or 10-mm implant. After a healing period of 10 wk, implants were loaded with a screw-retained single crown and followed up at yearly intervals...
March 1, 2018: Journal of Dental Research
Jacobs H Jordan, Corinne L D Gibb, Anthony Wishard, Thu Pham, Bruce C Gibb
A combination of1 H NMR spectroscopy, DLS, and turbidity measurements reveal that polarizable anions engender both the Hofmeister and reverse Hofmeister effects in positand 2. Host 2 possesses two principal and distinctly different binding sites: a "soft" nonpolar pocket and a "hard" crown of ammonium cations. NMR spectroscopy reveals that anion affinity to both sites is comparable, with each site showing characteristic selectivities. NMR spectroscopy also reveals that anions competitively bind to the pocket and induce the Hofmeister effect in host-guest binding at very low concentrations (∼2 mM)...
March 13, 2018: Journal of the American Chemical Society
Eny Kusrini, Fatimah Hashim, Cindy Gunawan, Riti Mann, Wan Nor Nadhirah Wan Noor Azmi, Nakisah Mat Amin
This work investigated the anti-amoebic activity of two samarium (Sm) complexes, the acyclic complex [bis(picrato)(pentaethylene glycol)samarium(III)] picrate-referred to as [Sm(Pic)2 (EO5)](Pic)-and the cyclic complex [bis(picrato)(18-crown-6)samarium(III)] picrate-referred to as [Sm(Pic)2 (18C6)](Pic). Both Sm complexes caused morphological transformation of the protozoa Acanthamoeba from its native trophozoite form carrying a spine-like structure called acanthopodia, to round-shaped cells with loss of the acanthopodia structure, a trademark response to environmental stress...
March 12, 2018: Parasitology Research
Michael E Alfaro, Brant C Faircloth, Richard C Harrington, Laurie Sorenson, Matt Friedman, Christine E Thacker, Carl H Oliveros, David Černý, Thomas J Near
The Cretaceous-Palaeogene (K-Pg) mass extinction is linked to the rapid emergence of ecologically divergent higher taxa (for example, families and orders) across terrestrial vertebrates, but its impact on the diversification of marine vertebrates is less clear. Spiny-rayed fishes (Acanthomorpha) provide an ideal system for exploring the effects of the K-Pg on fish diversification, yet despite decades of morphological and molecular phylogenetic efforts, resolution of both early diverging lineages and enormously diverse subclades remains problematic...
March 12, 2018: Nature Ecology & Evolution
Hyemin Kim, Nagahiro Saito
MnO2 -carbon hybrid (MnO2 -C-PBz) was simultaneously synthesized by a one-step solution plasma process (SPP) using a single precursor referred to as "purple benzene", which was derived from the K+ (dicyclohexano-18-crown-6 ether) complex. To clarify the synergistic effects on the cationic dye removal, MnO2 -free carbon and carbon-free MnO2 samples were concurrently investigated. The results of adsorption for cationic dyes (methylene blue (MB) and rhodamine B (Rh B)) and anionic dye (methyl orange (MO)) revealed remarkably high affinity for cationic dyes...
March 12, 2018: Scientific Reports
Xiao-Yun Huang, Hui-Long Liu, Min Lei, Chao-Hui Lian, Hui-Fen Mai
OBJECTIVE: To establish the intrauterine growth percentile curves of full-term neonates with different gestational ages (GAs) born to primiparous or multiparous women, and to investigate the influence of parity on intrauterine growth potential. METHODS: Cross-sectional cluster sampling was performed from April 2013 to September 2015 to measure physical growth in full-term singleton infants with a GA of 37-41 weeks in two hospitals in Shenzhen, China. The Lambda-Mu-Sigma method was used for curve fitting...
March 2018: Zhongguo Dang Dai Er Ke za Zhi, Chinese Journal of Contemporary Pediatrics
Imane Laraba, Abdelaziz Keddad, Houda Boureghda, Nora Abdallah, Martha M Vaughan, Robert H Proctor, Mark Busman, Kerry O'Donnell
A novel crown rot pathogen of wheat discovered during pathogen surveys in Algeria in 2014 and 2015 is formally described as Fusarium algeriense. Multilocus molecular phylogenetic data resolved the eight isolates of this pathogen as a genealogically exclusive species lineage in the F. burgessii species complex. The previously described species of this complex, F. burgessii and F. beomiforme, produce abundant chlamydospores in culture, and their optimal temperature for growth is 30 C. In comparison, F. algeriense did not produce chlamydospores under the conditions tested and its optimal temperature for growth is 25 C...
February 13, 2018: Mycologia
Chih-Wen Cheng, Chia-Hui Chien, Chun-Jung Chen, Panos Papaspyridakos
PURPOSE: The purpose of this randomized controlled clinical trial was to investigate the prosthetic outcomes of posterior implant-supported single crowns (SCs) with a modified monolithic zirconia or metal-ceramic design at 1 year of loading. MATERIALS AND METHODS: Forty participants with 73 dental implants in need of at least 1 maxillary or mandibular posterior implant-supported SC were consecutively selected for this study. The included participants were randomly divided into modified monolithic zirconia (MMZ) and metal-ceramic (MC) groups...
March 12, 2018: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
Irena Sailer, Asgeir G Asgeirsson, Daniel S Thoma, Vincent Fehmer, Thor Aspelund, Mutlu Özcan, Bjarni E Pjetursson
BACKGROUND: There is limited knowledge regarding the strength of zirconia abutments with internal and external implant abutment connections and zirconia abutments supported by a titanium resin base (Variobase, Straumann) for narrow diameter implants. OBJECTIVES: To compare the fracture strength of narrow diameter abutments with different types of implant abutment connections after chewing simulation. MATERIAL AND METHODS: Hundred and twenty identical customized abutments with different materials and implant abutment connections were fabricated for five groups: 1-piece zirconia abutment with internal connection (T1, Cares-abutment-Straumann BL-NC implant, Straumann Switzerland), 1-piece zirconia abutment with external hex connection (T2, Procera abutment-Branemark NP implant, Nobel Biocare, Sweden), 2-piece zirconia abutments with metallic insert for internal connection (T3, Procera abutment-Replace NP implant, Nobel Biocare), 2-piece zirconia abutment on titanium resin base (T4, LavaPlus abutment-VarioBase-Straumann BL-NC implant, 3M ESPE, Germany) and 1-piece titanium abutment with internal connection (C, Cares-abutment-Straumann BL-NC implant, Straumann, Switzerland)...
March 11, 2018: Clinical Oral Implants Research
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