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1. Molybdenum( vi ) tris(amidophenoxide) complexes

   https://doi.org/10.1039/C8DT03392G  

   Erickson, Alexander N.; Brown, Seth N. (November 2018, Dalton Transactions)

   Tris(2-(arylamido)-4,6-di- tert -butylphenoxo)molybdenum( vi ) complexes ( R ap) 3 Mo can be prepared either from (cycloheptatriene)Mo(CO) 3 and the N -aryliminoquinone, or from MoO 2 (acac) 2 and the aminophenol. In contrast to all other reported unconstrained transition metal tris(amidophenoxide) complexes, the molybdenum complexes show a facial geometry in the solid state. In solution, the fac isomer predominates, though a small amount of mer isomer is detectable at room temperature. At elevated temperature the two species interconvert through Rây-Dutt trigonal twists, which are faster than Bailar twists in this system, presumably because of steric effects of the N -aryl groups. Substituents on the N -aryl ring shift the fac / mer equilibrium of the complex, with more electron-withdrawing substituents generally increasing the proportion of the mer isomer. The preference for fac over mer geometry is thus suggested to be due to enhanced π bonding in the fac isomer. In contrast to analogous catecholate complexes, the tris(amidophenoxide) complexes are not Lewis acidic and are inert to nucleophilic oxidants such as amine- N -oxides. 

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2. Assessment of prediction methods for protein structures determined by NMR in CASP14 : Impact of AlphaFold2

   https://doi.org/10.1002/prot.26246  

   Huang, Yuanpeng Janet; Zhang, Ning; Bersch, Beate; Fidelis, Krzysztof; Inouye, Masayori; Ishida, Yojiro; Kryshtafovych, Andriy; Kobayashi, Naohiro; Kuroda, Yutaka; Liu, Gaohua; et al (December 2021, Proteins: Structure, Function, and Bioinformatics)
3. Single Spot Rb‐Sr Isochron Dating of Biotite by LA‐MC‐ICP‐MS / MS

   https://doi.org/10.1111/ggr.12518  

   Cruz‐Uribe, Alicia M.; Craig, Grant; Garber, Joshua M.; Paul, Bence; Arkula, Cemil; Bouman, Claudia (July 2023, Geostandards and Geoanalytical Research)

   Laser ablation tandem mass spectrometry is a burgeoning field forin situRb‐Sr geochronology. Here, we determined simultaneous isotope ratios of⁸⁷Sr/⁸⁶Sr and⁸⁷Rb/⁸⁶Sr in metamorphic biotite from western Maine, using an ESL™ imageGEO™193 excimer laser ablation system coupled to a Thermo Scientific™ Neoma™ MC‐ICP‐MS/MS. Measurements were made on Faraday cups with Rb⁺at mass 87; Sr isotopes were reacted with SF₆gas and measured as SrF⁺at masses 103–107. Twenty‐two laser spots in biotite from a single sample yield a traditional Rb‐Sr isochron date of 289 ± 6 Ma. Time‐resolved signals reveal significant zoning in⁸⁷Sr/⁸⁶Sr and⁸⁷Rb/⁸⁶Sr within single spot analyses, which were used to construct single spot isochrons. Individual laser spots contain multiple isochronous subpopulations; some spots contain up to three distinct Rb‐Sr isochrons that are decoupled from variations in Rb/Sr. Thirty‐five isochron dates were determined using this sub‐spot approach, with⁸⁷Sr/⁸⁶Sr intercepts that systematically vary with Rb‐Sr date; two‐point isochrons were calculated for individual integrations (n= 780) based on these variable intercepts. Both methods yield age peaks at 303, 270 and 240 Ma. These data suggest that the Rb‐Sr system has the potential to record multiple heating, cooling or fluid‐alteration events spanning ~ 100 My within small domains in single biotite crystals. 

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4. RASSF1 is identified by transcriptome coordination analysis as a target of ATF4

   https://doi.org/10.1002/2211-5463.13569  

   Zhang, Youwen; Huynh‐Dam, Kim‐Tuyen; Ding, Xiaokai; Sikirzhytski, Vitali; Lim, Chang‐uk; Broude, Eugenia; Kiaris, Hippokratis (March 2023, FEBS Open Bio)
5. Fluorescent recognition of l - and d -tryptophan in water by micelle probes

   https://doi.org/10.1039/d0qm00260g  

   Du, Gengyu; Mao, Yifan; Abed, Mehdi A.; Pu, Lin (July 2020, Materials Chemistry Frontiers)

   null (Ed.)

   A series of BINOL-based monoaldehydes have been designed and synthesized as fluorescent probes for l - and d -tryptophan. It is found that in the presence of a diblock copolymer PEG-PLLA, these probes can be encapsulated into micelles which in combination with Zn 2+ have exhibited chemo- and enantioselective fluorescent enhancement with tryptophan in aqueous media. 

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