Thoracic ultrasonic narration of Covid-19 pneumonia.

Covid-19 (SARS-CoV-2) is a new coronavirus. Since the declaration of a global pandemic, a lot has been learnt about its spread, disease pattern, diagnosis and management. The lungs remain the prime organs to incur serious insult and when lung complications embark, significant morbidity and mortality is observed.

Author Correction: Metallacyclic actinide catalysts for dinitrogen conversion to ammonia and secondary amines.

An amendment to this paper has been published and can be accessed via a link at the top of the paper.

Metallacyclic actinide catalysts for dinitrogen conversion to ammonia and secondary amines.

Chemists have spent over a hundred years trying to make ambient temperature/pressure catalytic systems that can convert atmospheric dinitrogen into ammonia or directly into amines. A handful of successful d-block metal catalysts have been developed in recent years, but even binding of dinitrogen to an f-block metal cation is extremely rare. Here we report f-block complexes that can catalyse the reduction and functionalization of molecular dinitrogen, including the catalytic conversion of molecular dinitrogen to a secondary silylamine.

A tetranuclear samarium(ii) inverse sandwich from direct reduction of toluene by a samarium(ii) siloxide.

The dinuclear SmII complex, [Sm2L4(dme)] (L = OSi(OtBu)3), is easily obtained from the protonolysis reaction of [Sm{N(SiMe3)2}(thf)2] with HOSi(OtBu)3. This complex reacts slowly with toluene, resulting in the isolation of the triple-decker arene-bridged SmII complex, [{Sm2L3}2(μ-η6:η6-C7H8)], in 44% yield. This reactivity provides the first example of unambiguous arene reduction by an isolated SmII species.

Reduction of a Cerium(III) Siloxide Complex To Afford a Quadruple-Decker Arene-Bridged Cerium(II) Sandwich.

Organometallic multi-decker sandwich complexes containing f-elements remain rare, despite their attractive magnetic and electronic properties. The reduction of the Ce siloxide complex, [KCeL ] (1; L=OSi(OtBu) ), with excess potassium in a THF/toluene mixture afforded a quadruple-decker arene-bridged complex, [K(2.2.

Metathesis of a U imido complex: a route to a terminal U sulfide.

Herein, we report the synthesis and characterisation of the first terminal uranium(v) sulfide and a related U trithiocarbonate complex supported by sterically demanding tris(-butoxy)siloxide ligands. The reaction of the potassium-bound U imido complex, [U(NAd){OSi(OBu)}K] (), with CS led to the isolation of perthiodicarbonate [K(18c6)][CS] (), with concomitant formation of the U complex, [U{OSi(OBu)}], and S[double bond, length as m-dash]C[double bond, length as m-dash]NAd. In contrast, the reaction of the U imido complex, [K(2.

Outcomes of adjustable strabismus surgery in an Irish University Hospital.

Purpose: Strabismus surgery aims to improve binocular vision, reduce diplopia, and enhance cosmesis. Adjustable strabismus procedures have been developed as a means of tackling unpredictability in some post-operative results. The purpose of the study was to compare the effectiveness of adjustable and non-adjustable squint procedures in the treatment of strabismus.

Activation of SO by [Zn(Cp*)] and [(Cp*)Zn-Zn(Cp*)].

Interesting reactivity was observed in reactions of SO with [Zn(Cp*)] and [(Cp*)Zn-Zn(Cp*)]. These reactions proceeded with insertion of SO into the Zn-C bonds. Spectacularly, the lability of the C-S bond in the OSCp* ligands led to the thermal decomposition of [Zn(OSCp*)(tmeda)] to afford [Zn(μ-SO)(μ-SO)(tmeda)].

Early-Late Heterometallic Complexes of Gold and Zirconium: Photoluminescence and Reactivity.

OH functionalized triarylphosphines were used to assemble zirconocene-based metalloligands with phosphine donor sites in varying positions. These complexes were subsequently treated with different gold precursors to obtain early-late heterometallic compounds in which the metal atoms exhibit different intermetallic distances. All compounds were fully investigated by spectroscopic techniques, photoluminescence measurements and single crystal X-ray diffraction.

Exploring the effect of the Ln(III)/Ln(II) redox potential on C-F activation and on oxidation of some lanthanoid organoamides.

The divalent europium complexes, and (L(Me/Et) = p-HC6F4N(CH2)2NMe2/Et2), have been prepared from redox-transmetallation/protolysis (RTP) reactions between Eu metal, Hg(C6F5)2 and L(Me/Et)H in thf. The complexes exhibit close (C)F-Ln interactions and the amide ligands feature tridentate N,N',F chelation. The complexes are thermally robust but on exposure to light they undergo C-F activation.

Reliability and Validity of the Measurement of Scapular Position Using the Protractor Method.

Background: The protractor method is a proposed clinical assessment tool, the first to measure vertical scapular position, that directly compares scapular and spinal landmarks. This tool has the potential to reliably and accurately measure excessive scapular elevation or depression.

Objective: The purpose of this study was to determine reliability and validity of the protractor method to measure resting scapular position.

Thyroid-like ophthalmopathy in a euthyroid patient receiving Ipilimumab.

A 68-year-old lady with metastatic malignant melanoma was treated with Ipilimumab. She presented to Eye Casualty unable to move her eyes. Physical examination confirmed ophthalmoplegia and identified proptosis bilaterally.

Predictors of 10-year pancreas allograft survival after simultaneous pancreas and kidney transplantation.

Objective: This study aimed to identify the preoperative, perioperative, and postoperative factors affecting 10-year pancreas allograft survival after simultaneous pancreas and kidney (SPK) transplantation.

Methods: Analysis was performed on a prospectively maintained database of 56 SPK transplants consecutively performed between January 1992 and October 2002. The definition cutoff points of specific variables were obtained by the receiver operating characteristic curve and multiple logistic regression analyses that were performed to determine the predictors of pancreas allograft survival after 10 years.

Selective arterial embolisation of bilateral angiomyolipomata in a symptomatic pregnant female.

Renal angiomyolipoma (RA) is a rare benign tumour that can expand rapidly during pregnancy due to oestrogen and other hormonal factors. Complications associated with expanding renal angiomyolipomata are spontaneous retroperitoneal haemorrhage secondary to acute rupture and thrombosis of the renal vein or inferior vena cava. MRI is recommended for diagnostic purposes in pregnancy; however, this modality is not always readily available.

Thrombosed prosthetic valve in Ebstein's anomaly: Evaluation with echocardiography and 64-slice cardiac computed tomography.

Ebstein's anomaly (EA) is a rare cardiac congenital malformation with displacement of septal and posterior tricuspid leaflets, resulting in atrialization of the right ventricle. We report a case of EA in which the etiology of a malfunctioning prosthetic tricuspid valve is depicted on cardiac computed tomography to be as a result of thrombus lodged in the valve.

The effects of light lanthanoid elements (La, Ce, Nd) on (Ar)CF-Ln coordination and C-F activation in N,N-dialkyl-N'-2,3,5,6-tetrafluorophenylethane-1,2-diaminate complexes.

A new class of homoleptic organoamido rare earth complexes [Ln(L(Me) or L(Et))(3)] (Ln = La, Ce, Nd; L(Me/Et) = p-HC(6)F(4)N(CH(2))(2)NMe(2)/Et(2)) exhibiting (Ar)CF-Ln interactions has been isolated from redox-transmetallation/protolysis (RTP) reactions between the free metals, Hg(C(6)F(5))(2) and L(Me/Et)H in tetrahydrofuran, together with low yields of [Ln(L(Me))(2)F](3) (Ln = La, Ce) or [Nd(L(Et))(2)F](2) species, resulting from C-F activation reactions. The structures of the homoleptic complexes have eight-coordinate Ln metals with two tridentate (N,N',F) amide ligands including (Ar)CF-Ln bonds and either a bidentate (N,F) ligand (Ln = La, Ce, Nd; L(Et)) or a bidentate (N,N') ligand (Ln = Nd; L(Me)), in an unusual case of linkage variation. All (Ar)CF-Ln bond lengths are shorter than or similar to the corresponding Ln-NMe(2)/Et(2) bond lengths.