Federal University of Roraima

About: Federal University of Roraima is a based out in . It is known for research contribution in the topics: Population & Thermogravimetry. The organization has 981 authors who have published 1218 publications receiving 7849 citations. The organization is also known as: Federal University of Roraima.

Biometrics seeds, emergence and vigor of camu-camu seedlings depending on the seed coat coloring

Abstract: In the Brazilian Amazon is significant diversity of fruit species, the agronomic characteristics of which are still little studied. The objective of this study was to evaluate the influence of tegument coloration on germination and vigor of camu-camu seeds. The seeds were obtained from ripe and healthy fruits coming from population of the Urubu River in Roraima and were classified visually according to the tegument coloration of green, red and brown color. 200 seeds for each class of colors were utilized, evaluating the following biometric characters: length, breadth, thickness and individual mass, obtained with the aid of a digital caliper and precision balance. The experimental design utilized was the completely randomized with three treatments and 10 replications of 20 seeds. The highest means of mass and volume were obtained from brown and red seeds. The brown seeds produce higher content of root dry mass than both the green and red seeds. The physiological quality of camu-camu seeds of the Urubu River is associated with tegument coloration. Seeds with brown tegument have better development, greater growth of seedlings with greater accumulation of dry matter both in the roots and shoots.

Antropogeomorfologia da bacia hidrográfica do murutucu: abastecimento hídrico, uso e ocupação em belém-pa

Abstract: As Unidades de Protecao Integral estao divididasem Estacao Ecologica, Reserva Biologica, Parque Nacional (ou Estadual ou Municipal), Monumento Natural e Refugio de Vida Silvestre. A Area de Protecao Ambiental de Belem (APA Belem) enquadra-se na categoria Parque Nacional e se deve, sobremaneira, ao fato desta abrigar a fonte de abastecimento de agua de toda a Regiao Metropolitana de Belem (RMB), os lagos Bolonha e Agua Preta, alem de guardar um ambiente ameno e contemplativo com atrativos turisticos. Apesar de estar inserida na regiao amazonica, abundante em recursos hidricos, a cidade de Belem e sua regiao metropolitana, historicamente enfrentam dificuldades de captacao, armazenamento e distribuicao de agua. A antropogeomorfologia considerando as consequencias positivas e negativas da acao humana sobre o relevo ajuda a compreender como as formas e processos da Bacia Hidrografica do Murutucu (BHM) sao condicionados para se entender holisticamente quais alteracoes foram empreendidas nos mananciais do Utinga na BHM tornando mais eficiente o abastecimento hidrico na RMB. As alteracoes processadas na forma dos lagos mostraram ser necessarias para aumentar seu volume de agua e assim atender a demanda crescente da populacao da RMB denotando que a antropogeomorfologia e um importante instrumento de gestao ambiental.

Influência da lidocaína ou da dextrocetamina pela via intratesticular na anestesia com sevoflurano em cães submetidos à orquiectomia eletiva

Abstract: Background : Elective orchiectomy is one of the most performed surgeries in the veterinary practice and is considered a moderately painful procedure; thus, the use of balanced anesthesia is a good choice. Local anesthetics have shown to be effective for intratesticular and spermatic cord blocks in several species; however, there have been no reports of the use of dextroketamine with this purpose. The objective of this study was to evaluate cardiovascular and respiratory variables, and analgesia produced by intratesticular block using dextroketamine or lidocaine, as well as to assess post-anesthesia recovery and discharge in dogs subjected to elective orchiectomy under inhalation anesthesia with sevoflurane. Materials, Methods & Results : Sixteen dogs which underwent elective orchiectomy were included in this study. All animals were healthy based on clinical and hematological examinations. The animals were randomly distributed into two groups, in which 2% lidocaine at 1 mg/kg (LG) or 5% dextroketamine at 2.5 mg/kg (KG) were administered by the intratesticular route. In both groups, anesthesia was induced with propofol to effect, and maintained with 1.7 V% sevoflurane diluted in 100% oxygen, administered through a calibrated vaporizer and appropriate anesthetic system based on the animal’s weight, kept under spontaneous ventilation. After induction, 10 min were given for stabilization of exhaled anesthetic concentration before one of the treatments was administered intratesticularly. Five min after administration of the local block, the surgical procedure was performed, which lasted up to 15 min. The parameters evaluated were heart rate (HR), respiratory rate (RR), systolic arterial pressure (SAP), diastolic arterial pressure (DAP), mean arterial pressure (MAP), oxygen saturation of hemoglobin (SpO2), end-tidal carbon dioxide partial pressure (EtCO2), end-tidal sevoflurane concentration (EtSevo) in exhaled air, and body temperature (ToC), which were measured before administration of the intratesticular treatment and in specific time points during surgery. Analgesia during surgery, and post-anesthetic recovery and discharge were also assessed. There were no statistically significant differences between time points and groups for the variables evaluated. When evaluating post-anesthetic recovery and discharge, all animals received the grade needed for discharge in the first 15 min of evaluation. Discussion : Balanced anesthesia has proven benefits in veterinary medicine since it reduces cardiovascular and respiratory depression, increases drug potency due to synergism, and enables the reduction of inhalational anesthetic requirement during anesthesia. The results of this study show that there was adequate analgesia during the procedure of elective orchiectomy, considering that the values found during surgery were relatively lower than the baseline values and within physiological limits for the species, even during ligation and transection of the spermatic cord, which are described as the most painful moments of the surgical procedure. Anesthetic recovery and discharge were fast owing to the absence of premedication, no residual effects from local anesthesia, and use of sevoflurane, which has a very low blood-gas solubility coefficient and therefore results in faster recovery rates. Therefore, it was possible to conclude that administration of both lidocaine and dextroketamine via the intratesticular route produced adequate analgesia, cardiovascular and respiratory stability, decreased sevoflurane requirement, and yielded fast anesthetic recovery.

Escalas termoquímicas e espectroscópicas de basicidade: breve revisão

Abstract: A brief review about the main thermochemical and spectroscopic basicity scales is presented, with a discussion about the range of reliability of them. Is concluded that, as a general trend, thermochemical basicity scales are more sensitives, and so reliable, than spectroscopic ones.