Benign Bilateral Adenomyoepithelioma of the Mammary Gland in a Ring-tailed Lemur (Lemur catta)

Naturally occurring mammary tumours are uncommon in prosimians. A 20-year-old female ring-tailed lemur (Lemur catta) developed bilateral enlargement of the mammary glands. Surgical removal revealed that both masses were comprised of multiple nodules and cystic areas that entirely replaced the normal glands. Histologically, a benign neoplastic biphasic cellular proliferation, composed of luminal–epithelial and basal–myoepithelial components, was identified. Immunohistochemical analysis for expression of cytokeratin (CK) AE1/AE3, CK7, CK5 + 8, CK14, vimentin, p63 and 14-3-3σ highlighted the biphasic nature of the neoplasm. A low mitotic count, low Ki67 labelling index, expression of oestrogen receptor-α, lack of expression of human epidermal growth factor receptor and a 3-year disease-free period without recurrence supported the benign nature of the tumour. Macroscopically, histologically and immunohistochemically this neoplasm resembled benign adenomyoepithelioma of the breast in women. This is the first complete report of a naturally occurring mammary tumour in a ring-tailed lemur

Infinite pointwise lineability: general criteria and applications

In this paper we introduce the concept of infinite pointwise dense lineability (spaceability), and provide a criterion to obtain density from mere lineability. As an application, we study the linear and topological structures within the set of infinite differentiable and integrable functions, for any order $p \geq 1$, on $\mathbb{R}^N$ which are unbounded in a prefixed set

Determination of texture by infrared spectroscopy in titanium oxide–anatase thin films

12 pages, 6 figures, 4 tables, 2 appendix.-- PACS: 68.55.Jk; 78.66.Nk; 78.30.HvA theoretical model to determine the effective dielectric tensor of heterogeneous materials composed by anisotropic microcrystallites has been introduced to explain the infrared spectral features of textured thin films of uniaxial materials as the function of a textural parameter. This theoretical treatment is able to satisfactorily reproduce the experimental absorbance spectra of TiO2–anatase thin films chosen as a model system. Comparison of texture data obtained from infrared spectroscopy and x-ray diffraction are in good agreement which support the validity of the proposed model.Peer reviewe

Experimental Wind Characterization with the SuperCam Microphone under a Simulated martian Atmosphere

Located on top of the mast of the Mars 2020 Perseverance rover, the SuperCam instrument suite includes a microphone to record audible sounds from 100 Hz to 10 kHz on the surface of Mars. It will support SuperCam’s Laser-Induced Breakdown Spectroscopy investigation by recording laser-induced shock-waves but it will also record aeroacoustic noise generated by wind flowing past the microphone. This experimental study was conducted in the Aarhus planetary wind-tunnel under low CO2 pressure with wind generated at several velocities. It focused on understanding the wind-induced acoustic signal measured by microphones instrumented in a real scale model of the rover mast as a function of the wind speed and wind orientation. Acoustic spectra recorded under a wind flow show that the low-frequency range of the microphone signal is mainly influenced by the wind velocity. In contrast, the higher frequency range is seen to depend on the wind direction relative to the microphone. On the one hand, for the wind conditions tested inside the tunnel, it is shown that the Root Mean Square of the pressure, computed over the 100 Hz to 500 Hz frequency range, is proportional to the dynamic pressure. Therefore, the SuperCam microphone will be able to estimate the wind speed, considering an in situ cross-calibration with the Mars Environmental Dynamic Analyzer. On the other hand, for a given wind speed, it is observed that the root mean square of the pressure, computed over the 500 Hz to 2000 Hz frequency range, is at its minimum when the microphone is facing the wind whereas it is at its maximum when the microphone is pointing downwind. Hence, a full 360° rotation of the mast in azimuth in parallel with sound recording can be used to retrieve the wind direction. We demonstrate that the SuperCam Microphone has a priori the potential to determine both the speed and the direction of the wind on Mars, thus contributing to atmospheric science investigations

Standards in semen examination: publishing reproducible and reliable data based on high-quality methodology

Biomedical science is rapidly developing in terms of more transparency, openness and reproducibility of scientific publications. This is even more important for all studies that are based on results from basic semen examination. Recently two concordant documents have been published: the 6th edition of the WHO Laboratory Manual for the Examination and Processing of Human Semen, and the International Standard ISO 23162:2021. With these tools, we propose that authors should be instructed to follow these laboratory methods in order to publish studies in peer-reviewed journals, preferable by using a checklist as suggested in an Appendix to this article

Determination of texture by infrared spectroscopy in titanium oxide–anatase thin films

12 pages, 6 figures, 4 tables, 2 appendix.-- PACS: 68.55.Jk; 78.66.Nk; 78.30.HvA theoretical model to determine the effective dielectric tensor of heterogeneous materials composed by anisotropic microcrystallites has been introduced to explain the infrared spectral features of textured thin films of uniaxial materials as the function of a textural parameter. This theoretical treatment is able to satisfactorily reproduce the experimental absorbance spectra of TiO2–anatase thin films chosen as a model system. Comparison of texture data obtained from infrared spectroscopy and x-ray diffraction are in good agreement which support the validity of the proposed model.Peer reviewe

Syntheses of the perovskite La2CuTiO6 by the ceramic, oxide precursors and sol-gel methods, and study of the structure and Cu-Ti distribution by X-ray and neutron diffraction

The mixed perovskite La2CuTiO6 has been prepared using several methods (classical ceramic, oxide precursors and sol-gel) in order to study the distribution of Cu and Ti in the lattice. This perovskite has an orthorhombically distorted structure [Pnma, standard group no. 62, a = 5.6262(6) Å, b = 7.8396(8) Å, c = 5.5702(6) Å, V = 245.7 Å3] of the GdFeO3 type, and not cubic symmetry as was reported earlier. The different synthetic methods used led to the same phase with different degrees of distortion. Starting from precursor oxides the reaction is faster and by the sol-gel method takes place at lower temperatures than for the ceramic synthesis. Detailed X-ray and neutron powder diffraction studies unambiguously show that Cu and Ti are disordered among the B sites of the perovskite, and give a quantitative idea of the distortion, which is less pronounced than in the case of GdFeO3 itself.We thank the Spanish CICYT (MAT90-1020-C02-01) and the MIDAS Program (92-1592) for financial support, and the Departament d’Ensenyament de la Generalitat de Catalunya for a predoctoral fellowship awarded to M.R.P.Peer Reviewe

Obtention of superconducting YBa2Cu3O7-δ deposits by electrodeposition and electrophoresis

Simultaneous electrodeposition of Y, Ba and Cu from solution is achieved in presence of complexing agents, using metal wires as substrates. The resulting wire is superconducting after thermal treatment at 900 °C. The main problem is the presence of excess copper in the deposit that may be easily overcome using cyanide as a complexing agent which inhibits copper deposition in DMSO. On the other hand, deposition of YBa2Cu3O7-δ particles by electrophoresis yields superconducting wires with preferential orientation and high critical currents.Peer Reviewe

Study of the formation of SrCuO2 from Sr2CuO3 and CuO by x-ray thermodiffractometry

ChemInform Abstract.Peer Reviewe