Investigation of a bimetallic terbium(III)/copper(II) chemosensor for the detection of aqueous hydrogen sulfide.

The chemosensor properties of a bimetallic terbium(III)/copper(II) complex functionalized with a 4-(2-pyridyl)-1,2,3-triazole ligand for the detection of Cu ions and, aqueous and gaseous hydrogen sulfide was investigated. The 4-(2-pyridyl)-1,2,3-triazole ligand functions both as an antenna chromophore and a receptor for Cu ions; the Cu complex was shown to be a chemosensor for the detection of aqueous hydrogen sulfide. The chemosensor exhibited significant reversibility over multiple cycles, observed with the sequential addition of NaS followed by Cu ions.

Analyzing Cell-free Genomic DNA in Spent Culture Media: Noninvasive Insight into the Blastocysts.

A commonly accepted standard protocol for noninvasive techniques for the genetic evaluation of an embryo remains elusive due to inconclusiveness regarding the volume of spent media to be acquired and the possibility of acquiring the same for subsequent analysis. Single embryo culture is imperative for standardizing noninvasive preimplantation testing using cell-free DNA (cf-DNA) released by individual developing embryos. This study aims to compare the development dynamics of single-drop embryonic culture against with group embryonic culture to establish a standardized protocol for noninvasive Preimplantation Genetic Testing (PGT) in bovine.

Generation and physiological characterization of genome-edited Nicotiana benthamiana plants containing zeaxanthin as the only leaf xanthophyll.

Simultaneous genome editing of the two homeologous LCYe and ZEP genes of Nicotiana benthamiana results in plants in which all xanthophylls are replaced by zeaxanthin. Plant carotenoids act both as photoreceptors and photoprotectants in photosynthesis and as precursors of apocarotenoids, which include signaling molecules such as abscisic acid (ABA). As dietary components, the xanthophylls lutein and zeaxanthin have photoprotective functions in the human macula.

[Sundowning of the elderly person].

Sundowning is an aggravation of the elderly's neuropsychiatric symptoms that happen when daylight disappears. Behavioral disorders occur during these hours and are a source of disturbance within the care teams. Caregivers may find themselves unable to do their jobs.

Detection of aqueous and gaseous hydrogen sulfide with lanthanide-macrocycle binary complexes.

Two novel, discrete lanthanide-macrocycle binary complexes for the detection of hydrogen sulfide are reported. The hydrogen sulfide sensing mechanism utilises the copper sequestration at a secondary binding site, with resulting bimetallic lanthanide(III)/copper(II) complexes (Ln = Eu and Tb) exhibiting high selectivity, good sensitivity and excellent reversibility for aqueous hydrogen sulfide. The inclusion of the DO2A macrocycle and 4-(2-pyridyl)-1,2,3-triazole dipicolinic acid ligand, results in a complex with good solubility and stability.

Production of Saffron Apocarotenoids in Plants Genome-Edited to Accumulate Zeaxanthin Precursor.

Crocins are glycosylated apocarotenoids with strong coloring power and anti-oxidant, anticancer, and neuro-protective properties. We previously dissected the saffron crocin biosynthesis pathway, and demonstrated that the CsCCD2 enzyme, catalyzing the carotenoid cleavage step, shows a strong preference for the xanthophyll zeaxanthin in vitro and in bacterio. In order to investigate substrate specificity in planta and to establish a plant-based bio-factory system for crocin production, we compared wild-type plants, accumulating various xanthophylls together with α- and β-carotene, with genome-edited lines, in which all the xanthophylls normally accumulated in leaves were replaced by a single xanthophyll, zeaxanthin.

Heterologous expression of Bixa orellana cleavage dioxygenase 4-3 drives crocin but not bixin biosynthesis.

Annatto (Bixa orellana) is a perennial shrub native to the Americas, and bixin, derived from its seeds, is a methoxylated apocarotenoid used as a food and cosmetic colorant. Two previous reports claimed to have isolated the carotenoid cleavage dioxygenase (CCD) responsible for the production of the putative precursor of bixin, the C24 apocarotenal bixin dialdehyde. We re-assessed the activity of six Bixa CCDs and found that none of them produced substantial amounts of bixin dialdehyde in Escherichia coli.

Mixed-ligand lanthanide complexes supported by ditopic bis(imino-methyl)-phenol/calix[4]arene macrocycles: synthesis, structures, and luminescence properties of [Ln(L)(MeOH)] (Ln = La, Eu, Tb, Yb).

The lanthanide binding ability of a macrocyclic ligand HL comprising two bis(iminomethyl)phenol and two calix[4]arene units has been studied. HL is a ditopic ligand which provides dinuclear neutral complexes of composition [Ln(L)(MeOH)] (Ln = La (1), Eu (2), Tb (3), and Yb (4)) in very good yield. X-ray crystal structure analyses for 2 and 3 show that (L) accommodates two seven coordinated lanthanide ions in a distorted monocapped trigonal prismatic/octahedral coordination environment.

A highly efficient red-emitting luminescent paper-based chemosensor for hydrogen sulfide.

The first discrete bimetallic europium(iii)/copper(ii) complex for the fast, sensitive and selective luminescent detection of both aqueous and gaseous hydrogen sulfide has been developed. The chemosensor displayed an impressive response time of 30 seconds and a low theoretical limit of detection (100 ppb) for gaseous hydrogen sulfide.

Time-Resolved Terbium-Based Probe for the Detection of Zinc(II) Ions: Investigation of the Formation of a Luminescent Ternary Complex.

Because of their unique photochemical and photophysical properties, luminescent lanthanide-based complexes have long captivated chemists. In recent years, the number of reports of luminescent lanthanide complex-based probes for monitoring of biological and environmental processes has dramatically increased, namely, because of their selectivity for particular analytes, lower limits of detection, and the fact that they allow monitoring of analytes in real time. Lanthanide-based probes need to be paired with an appropriate antenna/sensitizer to allow maximum energy transfer, with the antenna typically covalently attached to the stable lanthanide chelate.

Single Primer Enrichment Technology (SPET) for High-Throughput Genotyping in Tomato and Eggplant Germplasm.

Single primer enrichment technology (SPET) is a new, robust, and customizable solution for targeted genotyping. Unlike genotyping by sequencing (GBS), and like DNA chips, SPET is a targeted genotyping technology, relying on the sequencing of a region flanking a primer. Its reliance on single primers, rather than on primer pairs, greatly simplifies panel design, and allows higher levels of multiplexing than PCR-based genotyping.

Heterologous production of labdane-type diterpenes in the green alga Chlamydomonas reinhardtii.

Labdane diterpenes (LDs), and especially sclareol, are important feedstocks for the pharmaceutical and cosmetic industries, and therefore several lines of research have led to their heterologous production in non-photosynthetic microbes and higher plants. The potential of microalgae as bioreactors of natural products has been established for a variety of bioactive metabolites, including terpenes. In this work, a codon optimized sequence encoding a key plant labdane-type diterpene (LD) cyclase, copal-8-ol diphosphate synthase from Cistus creticus (CcCLS), was introduced into the chloroplast genome of Chlamydomonas reinhardtii.

Prevalence of iron deficiency in patients aged 75 years or older with heart failure.

Background: The latest studies presented at the American Heart Association (AHA) meeting on heart failure and the update of the European Cardiology Society's (ECS) recommendations on heart failure in 2016 recommend intravenous iron supplementation in patients with heart failure, reduced ejection fraction and iron deficiency for improves walking performance and quality of life, and reduces morbidity. In the present study, we investigated the prevalence of iron deficiency in heart failure patients aged 75 years or older, as there is currently no data on these patients.

Methods: We performed an observational study on hospitalized patients in Geriatric Cardiology Department.

Agrobacterium-mediated and electroporation-mediated transformation of Chlamydomonas reinhardtii: a comparative study.

Background: Chlamydomonas reinhardtii is an unicellular green alga used for functional genomics studies and heterologous protein expression. A major hindrance in these studies is the low level and instability of expression of nuclear transgenes, due to their rearrangement and/or silencing over time.

Results: We constructed dedicated vectors for Agrobacterium-mediated transformation carrying, within the T-DNA borders, the Paromomycin (Paro) selectable marker and an expression cassette containing the Luciferase (Luc) reporter gene.

Highly super capacitive electrodes made of graphene/poly(pyrrole).

We report on the development and characterization of high performance supercapacitor electrodes synthesized using electrophoretic deposition of graphene, upon which the poly(pyrrole)-layer was electropolymerised. The highly capacitive electrode had a specific capacitance of 1510 F g(-1), area capacitance of 151 mF cm(-2) and volume capacitance of 151 F cm(-3) at 10 mV s(-1).

Clinical images. Thyroid follicular carcinoma presenting as intraorbital, intracranial, and subcutaneous metastasis.

Follicular carcinoma of the thyroid usually metastasizes through a hematogenous route to the bone, lung, and central nervous system. Metastasis to subcutaneous tissues and retro-orbital region is unusual. We report an unusual case of follicular thyroid carcinoma with metastasis to subcutaneous tissues in the right temporal region with invasion of bone and intraorbital and intracranial tissues that was diagnosed by a computed tomography scan and biopsy.

Primary tubercular osteomyelitis of the sternum.

Primary tuberculous osteomyelitis of the sternum is a rare clinical entity. Sternal tuberculosis can result from direct extension of the disease from hilar lymph nodes, hematogenous or lymphatic dissemination from other sites, and following BCG vaccination in children. An unusual case of primary tuberculous osteomyelitis of the sternum that presented with a swelling and pain over the manubrium sterni is reported.

Hypohydrotic ectodermal dysplasia.

Hypohydrotic ectodermal Dysplasia (Christ-Siemens Touraine syndrome) is a rare genetic disorder that affect several ectodermal structures. The condition is usually inherited as X-linked recessive trait, in which gene is carried by females and manifested in males. The manifestations may vary in individuals and usually involves skin, hair, nail, sweat and sebaceous glands.

Annual risk of tuberculous infection in the northern zone of India.

Objective: To estimate the annual risk of infection with tubercle bacilli in the northern zone of India.

Methods: A community-based cross-sectional tuberculin survey was conducted among children aged 1-9 years who lived in a sample of villages and urban blocks of six selected districts in a defined north zone of India. A two-stage cluster sampling method was used to select rural and urban clusters.

Annual risk of tuberculous infection in the western zone of India.

Setting: Rural and urban areas of six selected districts in the western zone of India.

Objectives: To estimate the annual risk of tuberculous infection (ARI).

Design: A community-based, cross-sectional tuberculin survey was conducted among children aged 1-9 years residing in a sample of rural and urban areas of six districts in the western zone of India.

A trial of Phyllanthus amarus in acute viral hepatitis.

The study was done to know whether the powders of Phyllanthus amarus plants favourably influence the duration of disease in patients with acute viraus B hepatitis when compared to placebo. The powders of the plant were given in capsule form (300 mg capsules--3 capsules--3 capsules thrice daily) and an antacid powder in similar capsule was used as placebo. Persons with encephalopathy, preexisting medical conditions or serum bilirubin above 350 iu/l were excluded from the study.