Analysis of the biological and chemical characteristics of cabbage (Brassica oleracea var. Capitata L.) Fed with compost based on sugarcane residues.

The pandemic and the geopolitical conflict between Russia and Ukraine are events that have caused economic instability in Peru. Reason that was investigated on the analysis of the biological and chemical characteristics of cabbage fed with compost based on sugarcane residues. The objective was to analyze the physical, chemical and biological characteristics of cabbage from the adequate dose of compost based on sugarcane residues and distance between plants. It is based on the methodology applied with an experimental approach, for which the Completely Random Block Design with a 4x 2 factorial arrangement was used, which consisted of 3 blocks and 8 treatments that were the combination: F1 with 0, F2 with 8, T3 with 10 and F4 with 12 t/ha and spacing (D1) with 0.30 m between plants and 0.60 m between rows and (D2) with 0.35 m between plants and 0.60 m between rows. The physical characteristics of cabbage were evaluated and processed by analysis of variance, nutrient concentrations in leaves and stomatal density were analyzed. The results determined that T7 stood out in plant height with 41.88 cm, yield with 26.76 tn/ha and T6 in root length with 20.22 cm. In chemical analysis of leaves T1 stood out in nitrogen, phosphorus, potassium and T4 in calcium, magnesium and sulfur. In T7 stomata density with 977 stomata/mm2. It concludes that at an adequate dose and greater distance that T7 stands out in the concentration of nutrients that are within normal values and high density of stomata; Therefore, these characteristics influenced the optimal biochemical reactions, which obtained good development and yield that differed at 51.39% and 32.17% with respect to the controls T1 and T5.

Arterial pulse attenuation prediction using the decaying rate of a pressure wave in a viscoelastic material model.

The present study examines the possibility of attenuating blood pulses by means of introducing prosthetic viscoelastic materials able to absorb energy and damp such pulses. Vascular prostheses made of polymeric materials modify the mechanical properties of blood vessels. The effect of these materials on the blood pulse propagation remains to be fully understood. Several materials for medical applications, such as medical polydimethylsiloxane or polytetrafluoroethylene, show viscoelastic behavior, modifying the original vessel stiffness and affecting the propagation of blood pulses. This study focuses on the propagation of pressure waves along a pipe with viscoelastic materials using the Maxwell and the Zener models. An expression of exponential decay has been obtained for the Maxwell material model and also for low viscous coefficient values in the Zener model. For relatively high values of the viscous term in the Zener model, the steepest part of the pulse can be damped quickly, leaving a smooth, slowly decaying wave. These mathematical models are critical to tailor those materials used in cardiovascular implants to the mechanical environment they are confronted with to repair or improve blood vessel function.

Aphysiologic performance on dynamic posturography in work-related patients.

It has been suggested that malingering should be suspected in patients suffering from dizziness or imbalance and who had a potential gain associated with insurance and worker's compensation claims. This study aimed to assess and compare the prevalence of aphysiologic performance on computerized dynamic posturography (CDP) in patients with the potential for secondary gain using a retrospective review of two groups of patients: work-related patients referred for dizziness and/or imbalance (Group 1) were compared against a group of patients with complaints of dizziness or imbalance, who had no history of work-related injury, or litigation procedures (Group 2). CDP and videonystagmography (VNG) were carried out in all patients. The Sensory Organization Test summaries were scored as normal, aphysiologic, or vestibular using the scoring method published by Cevette et al. in Otolaryngol Head Neck Surg 112:676-688 (1995). 24 out of 88 (27%) patients had aphysiologic CDP in Group 1 and 9 out of 51 (18%) in Group 2 but these differences were not significant (p > 0.05). Definite signs of vestibular dysfunction were found in 12 out of 24 (50%) of patients with aphysiologic performance in Group 1 although the presence of VNG abnormalities was significantly higher (p = 0.005) in Group 2. The hypothesis that the occupational group could show a significantly higher rate of aphysiologic results than a control group is not confirmed. Furthermore, VNG abnormalities were found in 50% of the work-related cases with non organic sway patterns. These results suggest that patient's complaints should be considered genuine in work-related cases and due caution exercised when evaluating aphysiologic CDP patterns.

[Tobacco brand-related headache]. / Cefaleas relacionadas con marcas de tabaco.

INTRODUCTION: Tobacco smoking has been considered a risk factor for headache by some authors, while others disagree because of contradictory data. PATIENTS AND RESULTS: We describe the clinical aspects of eleven patients (four men and seven women) who presented to us with tobacco brand-related headaches. Clinical history help us to discover that headache of each patient was directly related with certain cigarette brands smoking. The cigarette brands implicated were diverse and different for each patient. Headaches were migraine-like in seven cases, cluster-like in three, and non-specific in the other one. They disappeared after switching brand or stopping smoking. CONCLUSIONS: In our patients, headaches were clearly related to smoking certain brands of cigarettes, which has never been reported before. This type of headache has characteristics that suggest that it could be a particular form of chemical odour intolerance, previously described. The number of possible responsible substances is large. More studies will be necessary in order to discover the mechanism leading patients to tobacco brand-related headache. It is important to ask our patients which cigarette brand they smoke, so it is possible to solve the problem.

[Epidemiology of ambulatory neurological diseases at the Baix Camp]. / Epidemiología de la patología neurológica ambulatoria en el Baix Camp (Tarragona) durante 1999.

BACKGROUND: Studies analyzing the incidence of ambulatory neurological diseases are scanty. INTRODUCTION: To describe the first prospective study of incidence of ambulatory neurological diseases at the Baix Camp (Tarragona). PATIENTS AND METHODS: This is a prospective study of a cohort of consecutive, first visited-patients at the neurology clinic of the Sant Joan Universitary Hospital of Reus. Demographic and clinical variables were analyzed. RESULTS: There were 1330 first visits, but 52 were excluded as they were diagnosed and treated previously at another medical center. So, the final study group included 1278 patients; 790 (61.8%) were woman and 488 (38.2%) men. Mean age was 48.7 years. The incidence ratio was 10.3 new neurological outpatients by 1000 hab./year. Headache was the most frequent symptom (36.5%), followed by focal symptoms and transitory loss of consciousness. The most frequent diagnoses were, by order of frequency, non-tumoral headaches (35.8%), followed by anxiety and depression, neuropathies and epilepsy. Cranial CT and MRI were the complementary exams more solicited. CONCLUSIONS: This epidemiological study corroborates that the most frequent neurological diseases were non-tumoral headaches, neuropathies and epilepsy. The need for specialized assistance could be reduced by better identification of certain diseases from primary medical assistance. This analysis will be actualized every five years.

Desinfección de los conductos radiculares / Root canals disinfection

Las soluciones irrigadoras son el principal auxiliar de la preparación biomecánica. las analizaremos en sus distintas alternativas