Physiological function and catalytic versatility of bacterial multihaem cytochromescinvolved in nitrogen and sulfur cycling

Bacterial MCCs (multihaem cytochromes c) represent widespread respiratory electron-transfer proteins. In addition, some of them convert substrates such as nitrite, hydroxylamine, nitric oxide, hydrazine, sulfite, thiosulfate or hydrogen peroxide. In many cases, only a single function is assigned to a specific MCC in database entries despite the fact that an MCC may accept various substrates, thus making it a multifunctional catalyst that can play diverse physiological roles in bacterial respiration, detoxification and stress defence mechanisms. The present article briefly reviews the structure, function and biogenesis of selected MCCs that catalyse key reactions in the biogeochemical nitrogen and sulfur cycles

Factores psicosociales relacionados con el autocuidado en la prevención, tratamiento y postratamiento del cáncer de mama

This paper discusses psychosocial factors which influence self-care in breast cancer patients during prevention, treatment and after-treatment phases. Self-care is defined as the set of activities that a patient consciously develops to look after her life, health and well-being, an it must be supported all over the different stages of the disease. Three different theoretical models are presented – Health Beliefs Model, Theory of Reasoned Action and Self-regulation Model – that try to understand how and why people practice self-care in chronic conditions and in breast cancer. Finally, the paper reflects upon the importance of women’s strength of spirit, of family relations and psychological interventions to improve self-care in the different phases of the diseaseEn el presente artículo se discute acerca de los factores psicosociales asociados al autocuidado en el cáncer de mama durante la prevención, el tratamiento y el postratamiento. El autocuidado se refiere a un conjunto de actividades que la persona realiza de manera consciente para mantener su vida, su salud y su bienestar, y es necesario que sea incentivado durante todas las etapas de la enfermedad. Se presentan distintos modelos teóricos – Modelo de Creencias de la Salud, Teoría de la Acción Razonada y Modelo de Autorregulación en Salud - que intentan entender cómo y porqué las personas se cuidan en situaciones de enfermedad crónica y su aplicación en el cáncer de mama. Por último, se reflexiona sobre la importancia del estado de ánimo de la mujer afectada, de la familia y de las intervenciones psicológicas para fomentar el autocuidado en las distintas etapas de la enfermedad

Molecular quantum spin network controlled by a single qubit

Scalable quantum technologies will require an unprecedented combination of precision and complexity for designing stable structures of well-controllable quantum systems. It is a challenging task to find a suitable elementary building block, of which a quantum network can be comprised in a scalable way. Here we present the working principle of such a basic unit, engineered using molecular chemistry, whose control and readout are executed using a nitrogen vacancy (NV) center in diamond. The basic unit we investigate is a synthetic polyproline with electron spins localized on attached molecular sidegroups separated by a few nanometers. We demonstrate the readout and coherent manipulation of very few ($\leq 6$) of these $S=1/2$ electronic spin systems and access their direct dipolar coupling tensor. Our results show, that it is feasible to use spin-labeled peptides as a resource for a molecular-qubit based network, while at the same time providing simple optical readout of single quantum states through NV-magnetometry. This work lays the foundation for building arbitrary quantum networks using well-established chemistry methods, which has many applications ranging from mapping distances in single molecules to quantum information processing.Comment: Author name typ

Look For The Silver Lining : Blair and Sally

https://digitalcommons.library.umaine.edu/mmb-vp/2026/thumbnail.jp

Whip-poor-will

https://digitalcommons.library.umaine.edu/mmb-vp/2748/thumbnail.jp

I\u27d Love To Dance Through Life With You

https://digitalcommons.library.umaine.edu/mmb-vp/4535/thumbnail.jp

Kondo temperature of magnetic impurities at surfaces

Based on the experimental observation, that only the close vicinity of a magnetic impurity at metal surfaces determines its Kondo behaviour, we introduce a simple model which explains the Kondo temperatures observed for cobalt adatoms at the (111) and (100) surfaces of Cu, Ag, and Au. Excellent agreement between the model and scanning tunneling spectroscopy (STS) experiments is demonstrated. The Kondo temperature is shown to depend on the occupation of the d-level determined by the hybridization between adatom and substrate with a minimum around single occupancy.Comment: 4 pages, 2 figure

The communication process in oncology: Reporting an experience

Informar a una persona de que tiene cáncer supone un shock para esa persona y para su familia. La enfermedad implica cambios físicos, psíquicos y sociales a los que tienen que aprender a enfrentarse tanto el propio afectado como su entorno más próximo. Conocer que se padece un cáncer aún se asocia inmediatamente con dolor y muerte y esto provoca que el enfermo tenga que enfrentarse a una situación dramática y angustiosa. Para que el afrontamiento de la enfermedad sea lo menos costoso física y emocionalmente para el paciente es necesario que se le atienda desde una perspectiva integral y holista en la que juega un papel destacado en primer lugar, la información que se le aporta sobre el diagnóstico y las posibilidades de tratamiento y, en segundo lugar, el proceso de comunicación que se inicia cuando al paciente ya se le ha comunicado el diagnóstico y que se prolonga hasta que se produce la remisión/curación de la enfermedad o el paciente fallece. En este artículo recogemos nuestra experiencia sobre la información y comunicación con pacientes oncológicos en tratamiento de quimioterapia. Es imprescindible trabajar ambos aspectos desde la individualidad de cada caso y para ello proponemos nuestras conclusiones sobre los aspectos básicos en los que es necesario centrarse para conseguir que el enfermo reciba una información adecuada a su caso particularTelling someone that he/she suffers cancer is a deep shock for the individual and its family as well. The disease involves physical, psychological and social changes that both the patient and his/her social environment have to learn to cope with. Cancer is still readily associated with pain and death, so patients have to face a dramatic and distressing situation. For achieving an emotionally and physically smooth treatment of cancer it is necessary to develop a comprehensive and holistic approach split into three stages. First, information provided about diagnosis and care possibilities. Secondly, the communication process along the treatment period, which may be rather long. Third, and particularly prominent, the communication process during the last stage of the disease, whether it disappears or leads to death. This paper presents our experience on the overall information and communication process with cancer patients who undergo chemotherapy treatment. It is essential to deal with information and communication on a personalized basis for each individual, so our conclusions are focused on the basic topics which have to be addressed for each patient to receive the information the most suitable for his/her particular case

Causal attribution to cervical cancer

This study aimed to examine the causal attribution for cervical cancer for women with and without the disease. Seventy-eight (78) users from the public healthcare system participated, which were divided into: a clinical group (CG) of women with cervical cancer and a non-clinical group (NCG) of women without cervical cancer. A Form covering sociodemographic and clinical data was utilized along with the Portuguese version of the Illness Perception Questionnaire for ill patients and healthy people. The responses were grouped into six categories: 1) Psychological attributions; 2) Behavioral risk factors; 3) Biological factors; 4) Bad luck; 5) Lack of resources; 6) Chemical agents. The CG attributed more emotional causes to the Cervical Cancer while the NCG more causes associated with behavioral risk factors. These results suggest that women with cancer may blame themselves for the illness. Distorted beliefs about the etiology of cervical cancer can harm preventative conduct and self-care practices.El estudio buscó examinar la atribución de causas del cáncer cervical de mujeres con y sin la enfermedad. Participaron setenta y ocho (78) usuarias del sistema público de salud, que fueron divididas en: grupo clínico (GC) de mu­jeres con cáncer cervical, y grupo no-clínico (GNC) de mujeres sin cáncer cervical. Fue uti­lizado un cuestionario de datos sociodemográ­ficos y clínicos y la versión en portugués del Illness Perception Questionnaire para pacien­tes enfermos y personas sanas. Las respuestas fueron agrupadas en seis categorías: 1) Atribu­ciones psicológicas; 2) Factores de riscos com­portamentales; 3) Factores biológicos; 4) Mala suerte; 5) Falta de recursos; 6) Agentes quími­cos. El GC atribuyó más causas emocionales al cáncer cervical, mientras el GNC atribuyó más causas asociadas a factores de risco comporta­mentales. Los resultados sugieren que mujeres con cáncer pueden culparse a sí mismas por la enfermedad. Creencias equivocadas sobre la etiología del cáncer cervical pueden perju­dicar conductas de prevención y prácticas de autocuidado

Hierarchical Triggering of Star Formation by Superbubbles in W3/W4

It is generally believed that expanding superbubbles and mechanical feedback from massive stars trigger star formation, because there are numerous examples of superbubbles showing secondary star formation at their edges. However, while these systems show an age sequence, they do not provide strong evidence of a causal relationship. The W3/W4 Galactic star-forming complex suggests a three-generation hierarchy: the supergiant shell structures correspond to the oldest generation; these triggered the formation of IC 1795 in W3, the progenitor of a molecular superbubble; which in turn triggered the current star-forming episodes in the embedded regions W3-North, W3-Main, and W3-OH. We present UBV photometry and spectroscopic classifications for IC 1795, which show an age of 3 - 5 Myr. This age is intermediate between the reported 6 - 20 Myr age of the supergiant shell system, and the extremely young ages (10^4 - 10^5 yr) for the embedded knots of ultracompact HII regions, W3-North, W3-Main, and W3-OH. Thus, an age sequence is indeed confirmed for the entire W3/W4 hierarchical system. This therefore provides some of the first convincing evidence that superbubble action and mechanical feedback are indeed a triggering mechanism for star formation.Comment: 10 pages, 6 figures; accepted to the Astronomical Journal. Figure 2 included in this submission as JPE