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https://www.readbyqxmd.com/read/28330091/optimization-of-regeneration-using-differential-growth-regulators-in-indica-rice-cultivars
#1
Samar Shekar R Sankepally, Bharat Singh
Paddy is a staple crop and being grown in major parts of India, but similarly it is facing some major challenges like abiotic stresses (drought, salinity, etc.) by which its productivity is greatly affected. De-husked seeds of 21 cultivars of indica rice were cultured onto MS medium for screening of their micropropagation capabilities. All the selected cultivars are being cultivated by farmers of Andhra Pradesh and Rajasthan states of India, these cultivars bear good quality of grain and high yield. Similarly, both states are facing the problem of drought so; we selected these cultivars for the micropropagation and transformation studies...
June 2016: 3 Biotech
https://www.readbyqxmd.com/read/28328538/hyperbranched-polyamine-assisted-synthesis-of-dual-luminescent-gold-composite-with-ph-responsive-character
#2
Zhiqin Yuan, Yi Du, Yan He
We present a facile one-pot, two-step strategy to prepare water-soluble dual-luminescent gold nanodots (AuNDs) and few-atom gold nanocluster composites simultaneously by using high molecular weight and hyperbranched polyethyleneimine (hPEI) as the protection ligand and stabilization agent. It was found that in the presence of hPEI, Au(III) ion can be reduced to a metastable Au(I) charge state in aqueous solution. Subsequently, adding 11-mercaptoundonioic acid induces parallel pathways of restricted Au(I) assembly, leading to the formation of both red-emitting hPEI stabilized AuNDs and blue-emitting hPEI-protected Au8 nanoclusters...
March 22, 2017: Methods and Applications in Fluorescence
https://www.readbyqxmd.com/read/28328171/use-of-a-traceless-activating-and-directing-group-for-the-construction-of-trifluoromethylpyrazoles-one-pot-transformation-of-nitroolefins-and-trifluorodiazoethane
#3
Zhen Chen, Yan Zheng, Jun-An Ma
We disclose an efficient one-pot transformation of trifluorodiazoethane and higher perfluorinated homologues with various nitroolefins. This method takes advantage of the nitro group as a traceless activating and directing group (TADG) that is released in the aromatization step to produce 4-substituted 3-perfluoroalkyl pyrazoles with complete regioselectivity. The potential of this method is further demonstrated by the synthesis of penthiopyrad.
March 22, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28328156/one-pot-multicomponent-synthesis-of-%C3%AE-amino-amides
#4
Bo Huang, Linwei Zeng, Yangyong Shen, Sunliang Cui
Multicomponent reactions are excellent tools for rapid generation of small molecules with broad chemical diversity and molecular complexity. Herein, a novel one-pot multicomponent synthesis of β-amino amides from aldehydes, anilines, carboxylic acids and ynamides has been successfully developed. This process is practical and efficient to unravel synthetic utility and scalability. Moreover, an isotope labeling reaction was conducted to elucidate a plausible reaction mechanism.
March 22, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28327767/regioselective-sn2-reactions-for-rapid-syntheses-of-azido-inositols-by-one-pot-sequence-specific-nucleophilysis
#5
Arthi Ravi, Syed Zahid Hassan, Ajithkumar N Vanikrishna, Kana M Sureshan
Triflates of myo-inositol undergo facile solvolysis in DMSO and DMF yielding SN2 products substituted with O-nucleophiles; DMF showed slower kinetics. Axial O-triflate undergoes faster substitution than equatorial O-triflate. By exploiting this difference in kinetics, solvent-tuning and sequence-controlled nucleophilysis, rapid synthesis of three azido-inositols of myo-configuration from myo-inositol itself has been achieved.
March 22, 2017: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/28327749/mono-and-polynuclear-ag-i-complexes-of-n-functionalized-bis-diphenylphosphino-amine-dppa-type-ligands-synthesis-solid-state-structures-and-reactivity
#6
Alessio Ghisolfi, Christophe Fliedel, Pierre de Frémont, Pierre Braunstein
The reactivity of the N-functionalized DPPA-type ligands (Ph2P)2N(p-Z)C6H4 [Z = H (1a), SMe (1b), OMe (1c)] with AgBF4 was investigated and revealed an unexpected influence of the para substituent Z of the N-aryl ligand. In acetone, the mononuclear bis-chelated [Ag{(1a-1c)-P,P}2]BF4 (2a·BF4-2c·BF4) and dinuclear bridged [Ag2{μ2-(1a-1c)-P,P}2](BF4)2 [3a·(BF4)2-3c·(BF4)2] complexes were obtained with a 1 : 2 and 1 : 1 AgBF4/ligand molar ratio, respectively. While the molecular structures of 2a·BF4 and 2b·BF4 determined in the solid-state by X-ray diffraction revealed their mononuclear nature and the absence of cation/anion interaction, complexes 3b·(BF4)2 and 3c·(BF4)2 form 2D coordination polymers through intermolecular Ag-S or Ag-O interactions, respectively, involving the N-function of the respective DPPA-type ligand, and display direct interactions between one BF4 anion and both Ag(i) cations...
March 22, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28327536/consecutive-one-pot-versus-domino-multicomponent-approaches-to-3-diarylmethylene-oxindoles
#7
Sunhwa Park, Jiyun Lee, Kye Jung Shin, Euichaul Oh, Jae Hong Seo
Based on consecutive one-pot conditions combining three palladium-catalyzed reactions (Sonogashira, Heck and Suzuki-Miyaura reactions), a more efficient domino multicomponent method has been successfully developed to access a wide variety of 3-(diarylmethylene)oxindoles. Microwave irradiation and use of a silver salt were the most important factors to achieve high yields and stereoselectivity.
March 22, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28326778/synthesis-of-pyrrole-via-a-silver-catalyzed-1-3-dipolar-cycloaddition-oxidative-dehydrogenative-aromatization-tandem-reaction
#8
Yan Liu, Huayou Hu, Xiang Wang, Sanjun Zhi, Yuhe Kan, Chao Wang
Pyrroles are an important group of heterocyclic compounds with a wide range of interesting properties, which have resulted in numerous applications in a variety of fields. Despite the importance of these compounds, there have been few reports in the literature pertaining to the synthesis of pyrroles from simple alkenes using a one-pot sequential 1,3-dipolar cycloaddition/aromatization reaction sequence. Herein, we report the development of a benzoyl peroxide-mediated oxidative dehydrogenative aromatization reaction for the construction of pyrrolidines...
March 22, 2017: Journal of Organic Chemistry
https://www.readbyqxmd.com/read/28326640/catalytic-enantioselective-synthesis-of-protecting-group-free-1-5-benzothiazepines
#9
Sara Meninno, Chiara Volpe, Alessandra Lattanzi
A one-pot enantioselective route to N-unprotected 2,3-dihydro-1,5-benzothiazepinones, by an organocatalyzed sulfa-Michael reaction of readily available α,β-unsaturated N-acyl pyrazoles with 2-aminothiophenols followed by silica-gel-catalyzed lactamization, has been developed. The method proceeds under mild conditions at room temperature and it requires only 1 mol % catalyst loading, to give 2-aryl/alkyl-substituted 1,5-benzothiazepines in generally good to excellent yields and enantioselectivities. The process, used for a short synthesis of antidepressant drug (R)-(-)-thiazesim, represents the first method to access enantioenriched unprotected 1,5-benzotiazepines, which are useful for rapid derivatization in drug discovery...
March 22, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28326308/infection-sources-of-a-common-non-tuberculous-mycobacterial-pathogen-mycobacterium-avium-complex
#10
REVIEW
Yukiko Nishiuchi, Tomotada Iwamoto, Fumito Maruyama
Numerous studies have revealed a continuous increase in the worldwide incidence and prevalence of non-tuberculous mycobacteria (NTM) diseases, especially pulmonary Mycobacterium avium complex (MAC) diseases. Although it is not clear why NTM diseases have been increasing, one possibility is an increase of mycobacterial infection sources in the environment. Thus, in this review, we focused on the infection sources of pathogenic NTM, especially MAC. The environmental niches for MAC include water, soil, and dust...
2017: Frontiers in Medicine
https://www.readbyqxmd.com/read/28325940/one-pot-synthesis-of-four-coordinate-boron-iii-complexes-by-the-ligand-promoted-organic-group-migration-between-boronic-acids
#11
Venkata S Sadu, Hye-Rin Bin, Do-Min Lee, Kee-In Lee
Multidisciplinary applications of four-coordinate boron(III) complexes make them very attractive and challenging research field in chemistry, biology and material sciences. The dual role played by boron atom in stabilising the chelate ligand and enhancing the π-conjugation makes them very useful as luminescent materials for organic electronics and photonics, and sensing and imaging probes for biomedical purposes. The conventional methods involve the use of diarylborinic acids or anhydrides and triaryl boranes, which are made from organometallic reagents...
March 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28325349/nanocrystalline-cellulose-fullerene-novel-conjugates
#12
A Herreros-López, M Carini, T Da Ros, T Carofiglio, C Marega, V La Parola, V Rapozzi, L E Xodo, Ali A Alshatwi, C Hadad, M Prato
The covalent grafting of two amino-fullerene C60 derivatives (C60-LC-NH2 and C60-SC-NH2, LC=long chain and SC=short chain) onto the surface of TEMPO oxidized nanocrystalline cellulose (NCC-COOH) has been reported for the first time. These hybrids (NCC-LC-C60 and NCC-SC-C60) form stable colloidal suspensions at concentrations up to 0.5mg/mL and act as effective photosensitizers for singlet oxygen production as demonstrated by the oxidation of L-methionine-methyl ester to the corresponding sulphoxide. Using the same approach, in a one-pot reaction both a fluorescent target molecule (FITC-LC-NH2) and the C60-LC-NH2 derivative have been successfully attached covalently onto the NCC-COOH surface...
May 15, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28325308/inspired-by-efficient-cellulose-dissolving-system-facile-one-pot-synthesis-of-biomass-based-hydrothermal-magnetic-carbonaceous-materials
#13
Jian-Feng Ma, Jian-Xiong Xing, Kun Wang, Hai-Yan Yang, Ben-Hua Fei, Xing-E Liu
The core-shell structure of carbon encapsulated magnetic nanoparticles (CEMNs) displays unique properties. Enhancing the magnetization of iron core, in parallel, improving the encapsulation of carbon shell are the two major challenges in the synthesis of CEMNs. Inspired by efficient cellulose-dissolving system, carbon encapsulated magnetic nano-Fe3O4 particles (Fe3O4@C) with ∼10.0nm Fe3O4 cores and 1.9-3.3nm carbon shell, were successfully one-pot synthesized via a novel hydrothermal carbonization (HTC) process...
May 15, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28324724/bio-inspired-one-pot-route-to-prepare-robust-and-repairable-micro-nanoscale-superhydrophobic-coatings
#14
Yifan Si, Fuchao Yang, Zhiguang Guo
Superhydrophobic (SHP) coatings inspired by lotus have great application prospect for our daily life. Regrettably, three formidable challenges, namely, complex fabrication, weak mechanical stability and large-scale fabrication, have already existed for a long time in this research field. Here, a robust micro-nanoscale P25 (Nano TiO2)/MgO/epoxy resin (ER) SHP coating has been fabricated via facile one-pot route, which can be applied to arbitrary substrates through multiples methods. P25/MgO/ER SHP coating not only displays excellent mechanical stability but also shows unique repairable ability to recover its superhydrophobicity under various damages by extreme environment such as low temperature, strong acid or alkali and this repairable process can be repeated for many times...
March 16, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28324718/l-arginine-assisted-one-pot-synthesis-of-hierarchical-ag1pt2-nanocorallines-for-surface-enhanced-raman-spectroscopy
#15
Liu-Ying Jiang, Xin-Sheng Li, Ai-Jun Wang, Hong Huang, Jiu-Ju Feng
The hierarchical multi-branched Ag1Pt2 nanocorallines (NCs) were prepared in a large scale by a rapid aqueous method, using l-arginine as the eco-friendly shape-directing agent. The product was mainly characterized by microscopy measurements, X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). The architectures exhibited superior surface-enhanced Raman scattering (SERS) with 4-nitrothiophenol (4-NTP), the enhancement factor (EF) of 1.3×10(5), a wide linear range of 10-100μM and a low detection limit of 0...
March 6, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28324662/arsenic-tolerance-and-phytoremediation-potential-of-conocarpus-erectus-l-and-populus-deltoides-l
#16
Sajad Hussain, Muhammad Akram, Ghulam Abbas, Behzad Murtaza, Muhammad Shahid, Noor S Shah, Irshad Bibi, Nabeel Khan Niazi
The present study was conducted to explore arsenic (As) tolerance and phytostabilization potential of the two tree species, Buttonwood (Conocarpus erectus) and Eastern cottonwood (Populus deltoides). Both plant species were exposed to various soil As levels (control, 5, 10, 15 and 20 mg kg(-1)) in pots. The plants were harvested after nine months for evaluation of growth parameters as well as root and shoot As concentrations. With increasing soil As levels, plant height stress tolerance index (PHSTI) was significantly decreased in both tree species, whereas root length stress tolerance index (RLSTI) and dry matter stress tolerance index (DMSTI) were not affected...
March 21, 2017: International Journal of Phytoremediation
https://www.readbyqxmd.com/read/28323708/fenestrated-screws-augmented-with-pmma-increase-the-pullout-strength-of-sacral-pedicle-screws
#17
Matthew Colman, Jonathan Pond, Kent Bachus, Brandon D Lawrence, William R Spiker, Darrel S Brodke
STUDY DESIGN: Biomechanics. OBJECTIVE: The objective of this study was to compare the fixation in osteoporotic specimens of a bicortical sacral pedicle screw to the following constructs: a unicortical solid screw augmented with polymethylmethacrylate (PMMA) (TRACT), a unicortical fenestrated screw augmented with PMMA (FEN), and a bicortical screw/sacral alar screw combination (PED/ALA). SUMMARY OF BACKGROUND DATA: Rigid posterior sacral fixation of osteoporotic spines is problematic due to poor bone quality...
April 2017: Clinical Spine Surgery
https://www.readbyqxmd.com/read/28323416/one-pot-two-nanoprobe-assay-uncovers-targeted-glycoprotein-biosignature
#18
Mira Anne C Dela Rosa, Wei-Chun Chen, Yi-Ju Chen, Rofeamor P Obena, Chih-Hsiang Chang, Rey Y Capangpangan, Tung-Hung Su, Chi-Ling Chen, Pei-Jer Chen, Yu-Ju Chen
We report a one-pot two-nanoprobe approach coupled to mass spectrometry for simultaneous quantification and post-translational modification (PTM) profiling of targeted protein in biofluid. Using N-glycoprotein as model, the assay employs two nanoprobes, antibody-conjugated SiO2 nanoparticles and lectin-conjugated magnetic Fe3O4 nanoparticles, to achieve target glycoprotein isolation from biofluid and subsequent glycopeptide enrichment in a single tube. As demonstrated on α-fetoprotein (AFP), a serum biomarker for hepatocellular carcinoma (HCC), the assay has high purification specificity (20 glycopeptides) with 2-fold and 10-fold superior total glycopeptide intensity compared to non-one-pot method (9 glycopeptides) or without enrichment (6 glycopeptides), respectively...
March 21, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28322566/o6-corona-6-arenes-with-expanded-cavities-for-specific-complexation-with-c70
#19
Yao Lu, Zhan-Da Fu, Qing-Hui Guo, Mei-Xiang Wang
O6-Corona[3]arene[3]tetrazines with expanded cavities were synthesized by one-pot SNAr reaction between 3,6-dichlorotetrazine and aromatic diols. The macrocycle-to-macrocycle transformation involving IEDDA of tetrazine moieties with an enamine followed by denitrogenative aromatization afforded O6-corona[3]arene[3]pyridazines. O6-Corona[6]arenes adopted coronary conformations yielding hexagonal cavities of varied sizes. While O6-corona[3]arene[3]pyridazines complexed both C60 and C70 in a virtually nonselective manner, O6-corona[3]arene[3]tetrazines behaved as selective receptors to complex C70 with K1:1 values up to (3...
March 21, 2017: Organic Letters
https://www.readbyqxmd.com/read/28322540/a-rapid-recovery-double-crosslinking-hydrogel-with-stable-mechanical-properties-and-high-resilience-triggered-by-visible-light
#20
Longxiang Zhu, Jianhui Qiu, Eiichi Sakai, Kazushi Ito
The designed tough hydrogels, depending on energy dissipation mechanism, possess excellent biocompatibility, stimuli-responsiveness and outstanding mechanical properties. However, the application of hydrogels are greatly limited in actuators and sensors for the lack of instantaneous recovery and resilience. In this work, we synthesized a double crosslinking polyacrylic acid hydrogel via a simple, one-pot, visible-light-trigger polymerization, where carboxymethyl cellulose as initiator and the first cross-linker, N,N'-methylene bisacrylamide (MBA) as the second cross-linker...
March 21, 2017: ACS Applied Materials & Interfaces
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