Three Developments Related to ANSI/HPS Standard N13.56.

Three topics related to ANSI/HPS Standard N13.56, Sampling and Monitoring Releases of Airborne Radioactivity in the Workplace, are discussed. First, due to the omission of consideration of the activity's half-life in the standard's continuous particulate air monitor (CPAM) quantitative method, it is possible for concentration estimates produced by that calculation to be underestimated.

Synthesis and characterization of borohydride rare-earth complexes supported by 2-pyridinemethanamido ligands and their application in the ring-opening polymerization of cyclic esters.

The synthesis of 2-pyridinemethanamido borohydride complexes of yttrium and neodymium was achieved through the deprotonation of the protio-ligand 2-pyridinemethanamine CHRN-C(CH)R-NH(2,6-PrCH), denoted as PyAH (with PyAH1: R = R = H; PyAH2: R = CH, R = H; PyAH3: R = C(CH)N-(2,6-PrCH), R = CH), in the presence of trisborohydride RE(BH)(THF) (RE = Y and Nd) as a precursor and a base. The isolation of various molecular structures, nine of which were structurally characterized by X-ray diffraction analysis, was achieved and revealed to depend not only on (i) the nature of the 2-pyridinemethanamido ligand and (ii) the rare-earth element but also on (iii) the reaction conditions, notably the type of base used. These include seven mono-substituted species, eventually also comprising the cation derived from the base reagent, such as [(PyA1)Y(BH)][Mg(THF)] (1Y), [(PyA1)Nd(BH)Mg(PyA1)](THF) (1Nd), (PyA1)Nd(BH)(THF) (1'Nd), [(PyA1)Nd(THF)(BH)(μ-BH)] (1''Nd), [(PyA2)Nd(BH)][Mg(THF)] (3Nd), (PyA2)Nd(BH)(THF) (3'Nd) and (PyA3)Nd(BH) (4Nd), as well as two bis-substituted complexes (PyA1)Y(BH) (2Y) and (PyA1)Nd(BH) (2Nd).

Heterogeneity of IKZF1 genomic alterations and risk of relapse in childhood B-cell precursor acute lymphoblastic leukemia.

Genomic alterations of are common and associated with adverse clinical features in B-ALL. The relationship between the type of alteration, disease subtype and outcome are incompletely understood. Leukemia subtype and genomic alterations were determined using transcriptome and genomic sequencing and SNP microarray in 688 pediatric patients with B-ALL in St.

Implementation and Baseline Evaluation of an Evidence-Based Group Antenatal Care Program in Two Nigerian States.

Northern Nigeria has had historically low antenatal care (ANC) utilization rates with poor health outcomes. Previous studies have shown that group antenatal care (gANC) improves ANC behavior and pregnancy outcomes. The gANC has been adopted in Kaduna and Kano States, Nigeria.

Cystoid macular oedema: a rare complication following selective laser trabeculoplasty.

A female patient with previous vitrectomy for epiretinal membrane in the left eye underwent bilateral selective laser trabeculoplasty (SLT) for pigmentary glaucoma and subsequently developed cystoid macular oedema (CMO) in the vitrectomised eye. This resolved fully with treatment with topical steroids and non-steroidal anti-inflammatory drug (NSAID) drops. This complication has been very rarely reported in the literature, and a subsequent internal audit found a very low rate of CMO temporally related to SLT of 0.