Evidence for entanglement at high temperatures in an engineered molecular magnet

The molecular compound [Fe$_{2}$($\mu_{2}$-oxo)(C$_{3}$H$_{4}$N$_{2}$)$_{6}$(C$_{2}$O$_{4}$)$_{2}$] was designed and synthesized for the first time and its structure was determined using single-crystal X-ray diffraction. The magnetic susceptibility of this compound was measured from 2 to 300 K. The analysis of the susceptibility data using protocols developed for other spin singlet ground-state systems indicates that the quantum entanglement would remain at temperatures up to 732 K, significantly above the highest entanglement temperature reported to date. The large gap between the ground state and the first-excited state (282 K) suggests that the spin system may be somewhat immune to decohering mechanisms. Our measurements strongly suggest that molecular magnets are promising candidate platforms for quantum information processing

Entanglement and Bell's inequality violation above room temperature in metal carboxylates

In the present work we show that a special family of materials, the metal carboxylates, may have entangled states up to very high temperatures. From magnetic susceptibility measurements, we have estimated the critical temperature below which entanglement exists in the cooper carboxylate \{Cu$_2$(O$_2$CH)$_4$\}\{Cu(O$_2$CH)$_2$(2-methylpyridine)$_2$\}, and we have found this to be above room temperature ($T_e \sim 630$ K). Furthermore, the results show that the system remains maximally entangled until close to $\sim 100$ K and the Bell's inequality is violated up to nearly room temperature ($\sim 290$ K)

Influence of the external pressure on the quantum correlations of molecular magnets

The study of quantum correlations in solid state systems is a large avenue for research and their detection and manipulation are an actual challenge to overcome. In this context, we show by using first-principles calculations on the prototype material KNaCuSi$_{4}$O$_{10}$ that the degree of quantum correlations in this spin cluster system can be managed by external hydrostatic pressure. Our results open the doors for research in detection and manipulation of quantum correlations in magnetic systems with promising applications in quantum information science

Immunoallergic Disorders in the Elderly

Although allergic diseases have become increasingly prevalent in the elderly, there are few data on this population. Through a retrospective analysis of the electronic medical records of patients aged 65 years and above followed in our Immunoallergology Unit, we aimed to characterize the immunoallergic diseases of the elderly. The most common disorders were respiratory diseases (n = 185; 50%), mucocutaneous diseases (n = 113; 31%), drug allergy (n = 31; 8%), food allergy (n = 9; 2%), and anaphylaxis (n = 9; 2%). Use of specific immunotherapy was residual (n = 2; 1%). There was an association between anaphylaxis and both, drug (p = 0.004) and food (p = 0.013) allergies. Non-allergic rhinitis and bronchial asthma were more frequent in females, and ACE inhibitors/ARB induced-angioedema in males. Recognizing the characteristics of immunoallergic diseases in the elderly and the specificities of this age group is paramount in providing these patients with the best possible care.info:eu-repo/semantics/publishedVersio

Principais doenças da cultura do milho.

Nos últimos anos, tem-se presenciado o aumento da incidência de doenças na cultura do milho, que resulta em quedas na produtividade e na qualidade dos grãos. As causas do aumento da incidência dessas doenças são a monocultura do milho, as alterações climáticas e o manejo cultural adotado, fazendo com que os patógenos (fungos, bactérias, nematóides, vírus, molicuttes) permaneçam por mais tempo na área de cultivo. O manejo de doenças do milho exige o empenho do produtor, que resultará numa maior ou menor eficiência do controle. Estão disponíveis no mercado, híbridos que apresentam diferentes graus de resistência para diferentes doenças, mas não para todas. Para algumas doenças foliares, causadas por fungos, há trabalhos comprovando a viabilidade e a eficiência do controle químico, podendo assim fazer parte do sistema de manejo da cultura

Extração e quantificação simultânea de polifenoloxidases de extratos proteicos solúveis e insolúveis de folhas.

Procedimento para a extração e quantificação de PFOs em folhas; Recomendações importantes para a execução do protocolo de dosagem de PFOs.bitstream/item/53725/1/COT146.pd

Micropropagação de goiabeira, maracujazeiro, bananeira e videira.

A micropropagação é uma técnica de propagação massal de plantas em condições de laboratório, em meio nutritivo específico, sob condições assépticas e ambiente controladobitstream/item/78867/1/CTE101.pd