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PubMedDate not supplied

Penetration of ultraviolet radiation in the marine environment. A review.

UV radiation (UVR) is a significant ecological factor in the marine environment that can have important effects on planktonic organisms and dissolved organic matter (DOM). The penetration of UVR into the water column is likely to change in the near future due to interactions between global warming and ozone depletion. In this study we report underwater instruments employed for the measurement of UVR and we review data dealing with the depth of UVR penetration in different oceanic areas including the open ocean, Antarctic waters and coastal waters. We provide the 10% irradiance depth (Z10%) for UV-A and UV-B as well as for DNA damage effective dose (DNA), which we calculated from the values of diffuse attenuation coefficients or vertical profiles reported in the literature. We observe a clear distinction between open ocean (high Z10%, no variation in the ratio UV-B/UV-A), Antarctic waters (increase in the ratio UV-B/UV-A during ozone hole conditions) and coastal waters (low Z10%, no variation in the ratio UV-B/UV-A). These variations in the penetration of UVR could lead to differences in the relative importance of photobiological/photochemical processes. We also compare in this study the penetration of UV-B (unweighted and weighted by the Setlow action spectrum) and DNA damage effective dose.

DNA Damage↗

PubMed2005

Rosalie: the Brazilian female monkey of Charcot.

Jean-Martin Charcot, the father of Neurology, a very austere and reserved man that did not express affection freely for human being, had a profound affection to animals, particularly to a small female monkey, called "Rosalie", which came from Brazil and was a gift of Dom Pedro II to Charcot.

Animals↗

PubMedDate not supplied

The use of cyclosporine modifies the clinical and histopathological presentation of tuberculosis after renal transplantation.

Tuberculosis is one of the most frequent opportunistic infections after renal transplantation and occurred in 30 of 1264 patients transplanted between 1976 and 1996 at Hospital São Paulo - UNIFESP and Hospital Dom Silvério, Brazil. The incidence of 2.4% is five times higher than the Brazilian general population. The disease occurred between 50 days to 18 years after the transplant, and had an earlier and worse development in patients receiving azathioprine, prednisone and cyclosporine, with 35% presenting as a disseminated disease, while all patients receiving azathioprine and prednisone had exclusively pulmonary disease. Ninety percent of those patients had fever as the major initial clinical manifestation. Diagnosis was made by biopsy of the lesion (50%), positivity to M. tuberculosis in the sputum (30%) and spinal cerebral fluid analysis (7%). Duration of treatment ranged from 6 to 13 months and hepatotoxicity occurred in 3 patients. The patients who died had a significant greater number of rejection episodes and received higher doses of corticosteroid. In conclusion, the administration of cyclosporine changed the clinical and histopathological pattern of tuberculosis occurring after renal transplantation.

Adolescent↗

PubMedDate not supplied

[Lutzomyia whitmani periurbanization in a focus of cutaneous leishmaniasis in the State of Maranhão, Brazil].

An entomological survey was performed in the periurban area of the municipality of Dom Pedro in the state of Maranhão in 2000, in order to estimate the abundance of Lutzomyia longipalpis, due to the occurrence of one suspect death caused by kala azar. However, it was surprisingly verified that 82.4% (2,440 specimens) from the total of 2,961 sand flies captured in the peridomicile were Lutzomyia whitmani. This association has indicated a new pattern for cutaneous leishmaniasis transmission (urban), as has been observed with regard to kala azar in the northeast of Brazil.

Animals↗

PubMed2004

[Books from the Arco do Cego in colonial Brazil].

Between 1799 and 1801, the friar José Mariano da Conceição Veloso, a Minas Gerais native, headed Lisbon's Casa Literária do Arco do Cego, which in a brief three-year span published at least eighty works on topics that included agriculture, navigation, and medicine. This editorial project must be understood within the context of Dom Rodrigo de Souza Coutinho's enlightened government program. Meant to modernize the Empire, it included dissemination of technical and practical knowledge in lands under Portuguese dominion, especially in the Americas. As a contribution to an understanding of the Enlightenment in Brazil , this article presents elements form my research on the development of the project and how it was received.

Agriculture↗

PubMed2004

Development of a coupled metal speciation-fate model for surface aquatic systems.

A coupled metal transport and speciation model (TRANSPEC) has been developed for surface aquatic systems that explicitly considers the influence of metal speciation on fate. The TRANSPEC, which is general to most metal and surface aquatic systems, is constructed by sequentially coupling the speciation/complexation module (in this application MINEQL+) with the fugacity/aquivalence approach for the fate calculations. This model formulation increases the mechanistic detail, predictive power, and fidelity to reality of current fugacity-aquivalence fate models for metals by estimating aqueous speciation and complexation, rather than relying on empirically derived partition coefficients. A pseudo-steady state version of TRANSPEC was used to simulate Zn dynamics in Ross Lake (Flin Flon, MB, Canada) that received elevated metal and organic matter inputs for over 50 years. Field studies revealed that ZnS forms soluble ZnL, Zn2+, and ZnSO4(0) increasing pore water concentrations when surficial sediments turn oxic during fall. The model results for three seasonal scenarios suggest that Zn remobilization is driven by resuspension of insoluble ZnS and the contribution of diffusion is negligible, even during fall when ZnS dissolves to increase the concentration of soluble species under oxic conditions in the sediments. The low diffusive flux is due to the binding of Zn to colloidal dissolved organic matter (DOM) for which sediment-water diffusion is relatively slow, a result that was obtained as a result of considering metal speciation in the fate calculations.

Colloids↗

PubMed1992

Exercise, muscle damage and fatigue.

Fatigue as a functional sign and muscle damage as a structural sign can be observed after prolonged exercise like marathon running or after strenuous exercise, especially with the involvement of eccentric contractions. For fatigue due to prolonged exercise, hypoxic conditions and the formation of free oxygen radicals seem to be of aetiological importance, resulting in an elevated lysosomal activity. Eccentric exercise of high intensity rather results in a mechanical stress to the fibres. Although these different mechanisms can be discerned experimentally, both result in similar impairments of muscle function. A good training status may attenuate the clinical signs of fatigue and muscle damage. The symptoms and events occurring during delayed onset of muscle soreness (DOMS) can be explained by a cascade of events following structural damage to muscle proteins.

Animals↗

PubMedDate not supplied

Internet patient records: new techniques.

BACKGROUND: The ease by which the Internet is able to distribute information to geographically-distant users on a wide variety of computers makes it an obvious candidate for a technological solution for electronic patient record systems. Indeed, second-generation Internet technologies such as the ones described in this article--XML (eXtensible Markup Language), XSL (eXtensible Style Language), DOM (Document Object Model), CSS (Cascading Style Sheet), JavaScript, and JavaBeans--may significantly reduce the complexity of the development of distributed healthcare systems. OBJECTIVE: The demonstration of an experimental Electronic Patient Record (EPR) system built from those technologies that can support viewing of medical imaging exams and graphically-rich clinical reporting tools, while conforming to the newly emerging XML standard for digital documents. In particular, we aim to promote rapid prototyping of new reports by clinical specialists. METHODS: We have built a prototype EPR client, InfoDOM, that runs in both the popular web browsers. In this second version it receives each EPR as an XML record served via the secure SSL (Secure Socket Layer) protocol. JavaBean software components manipulate the XML to store it and then to transform it into a variety of useful clinical views. First a web page summary for the patient is produced. From that web page other JavaBeans can be launched. In particular, we have developed a medical imaging exam Viewer and a clinical Reporter bean parameterized appropriately for the particular patient and exam in question. Both present particular views of the XML data. The Viewer reads image sequences from a patient-specified network URL on a PACS (Picture Archiving and Communications System) server and presents them in a user-controllable animated sequence, while the Reporter provides a configurable anatomical map of the site of the pathology, from which individual "reportlets" can be launched. The specification of these reportlets is achieved using standard HTML forms and thus may conceivably be authored by clinical specialists. A generic JavaScript library has been written that allows the seamless incorporation of such contributions into the InfoDOM client. In conjunction with another JavaBean, that library renders graphically-enhanced reporting tools that read and write content to and from the XML data-structure, ready for resubmission to the EPR server. RESULTS: We demonstrate the InfoDOM experimental EPR system that is currently being adapted for test-bed use in three hospitals in Cagliari, Italy. For this we are working with specialists in neurology, radiology, and epilepsy. CONCLUSIONS: Early indications are that the rapid prototyping of reports afforded by our EPR system can assist communication between clinical specialists and our system developers. We are now experimenting with new technologies that may provide services to the kind of XML EPR client described here.

Internet↗

PubMed2000

Energetics of larval swimming and metamorphosis in four species of Bugula (Bryozoa).

The amount of energy available to larvae during swimming, location of a suitable recruitment site, and metamorphosis influences the length of time they can spend in the plankton. Energetic parameters such as swimming speed, oxygen consumption during swimming and metamorphosis, and elemental carbon and nitrogen content were measured for larvae of four species of bryozoans, Bugula neritina, B. simplex, B. stolonifera, and B. turrita. The larvae of these species are aplanktotrophic with a short free-swimming phase ranging from less than one hour to a maximum of about 36 hours. There is about a fivefold difference in larval volume among the four species, which scales linearly with elemental carbon content and, presumably, with the amount of endogenous reserves available for swimming and metamorphosis. Mean larval swimming speeds (in centimeters per second) were similar among species. Specific metabolic rate and larval size were inversely related. For larvae of a given species, respiration rates remained similar for swimming and metamorphosis; however, because metamorphosis lasts about twice as long as a maximal larval swimming phase, it was more energetically demanding. Larger larvae expended more energy to complete metamorphosis than did smaller larvae, but in terms of the percentage of larval energy reserves consumed, swimming and metamorphosis were more "expensive" for smaller larvae. A comparison of the energy expended during larval swimming calculated on the basis of oxygen consumption and on the basis of elemental carbon decrease suggests that larvae of Bugula spp. may not use significant amounts of dissolved organic material (DOM) to supplement their endogenous energy reserves.

Animals↗

PubMed1998

An evaluation of ruminally degradable intake protein and metabolizable amino acid requirements of feedlot calves.

Ruminally degradable intake protein (DIP) and metabolizable indispensable amino acid (MIAA) requirements of feedlot steers were evaluated. Dietary treatments consisted of isocaloric 80% concentrate steam-flaked corn-based diets containing either .8% urea, 1.5% fish meal (FM), 3.0% FM, 4.5% FM, or 4.5% soybean meal (SBM). Treatment effects on characteristics of ruminal and total tract digestion were evaluated using four Holstein steers (249 kg) with cannulas in the rumen and proximal duodenum. Ruminal digestibility of OM (RDOM; P < .05) and feed N (P < .01) and microbial N flow (MNF; P < .01) to the small intestine were greater with urea as the supplemental N source. The level of DIP was closely associated (R2 = .89) with MNF. Postruminal digestibility of OM was greater (P < .05) for FM than for urea-supplemented diets, compensating for lower RDOM. There were no treatment effects (P > .10) on DOM. As the level of FM was increased, MIAA increased linearly (P < .01). Intestinal MIAA were similar (P > .10) for urea- and SBM-supplemented diets. Treatment effects on 56-d growth performance were evaluated using 100 medium-framed crossbred steers (231 kg). Daily weight gain (linear effect; P < .01), DM intake (linear effect; P < .10), feed efficiency (linear effect; P < .05), and diet NE (linear effect; P < .05) increased with level of FM supplementation. Daily weight gain (P < .10) and DM intake (P < .05) were greater for urea- than for SBM-supplemented diets. Using bovine tissue as the reference protein, the biological value (based on chemical score) of the intestinal chyme protein averaged 73%; methionine was first-limiting. There was a close association (R2 = .99) between methionine supply to the small intestine and observed/expected dietary NE. The metabolizable methionine requirement (MMETR, g/d) of medium-framed feedlot steers can be reliably predicted from measures of BW and ADG (MMETR = 1.565 + .0234ADG[268 - (29.4 x .0557BW(.75)ADG(1.097))/ADG] + .0896BW(.75)). There was a very close association (R2 = .89) between DIP and MNF (MNF = 13.7DIP - .66DIP(2) + 25.9). At maximal observed synthesis, DIP accounted for 76% of the MNF. A minimum of 100 g DIP/kg of total tract digestible OM was required to maximize RDOM and MNF.

Amino Acids↗

PubMed2005

Identification of the immunogenic domains in HBsAg preS1 region using overlapping preS1 fragment fusion proteins.

AIM: The incorporation of hepatitis B virus (HBV) preS1 region into epitope-based vaccines against HBV has been accepted widely, but the incorporate site and size of preS1 sequence is controversial. Therefore our purpose was to further investigate its immunogenic domains for the epitope-based hepatitis B vaccine design. METHODS: Eight GST fusion proteins containing overlapping preS1 fragments in preS1 (21-119) region were expressed in E.coli. Using these purified fusion proteins, the immunogenic domains in preS1 region were identified in detail in mice and humans by Western blot analysis and ELISA. RESULTS: The results in mice showed that the immu-nogenic domains mainly existed in preS1 (21-59) and preS1 (95-109). Similarly, these fragments had strong immunogenicity in humans; whereas the other parts except for preS1 (60-70) also had some immunogenicity. More importantly, a major immunogenic domain, preS1 (34-59), which has much stronger immunogenicity, was identified. Additionally, the antibodies against some preS1 fragments, especially preS1 (34-59), were speculated to be virus-neutralizing. CONCLUSION: Eight GST fusion proteins containing overlapping preS1 fragments were prepared successfully. They were used for the study on the immunogenic dom-ains in preS1 (21-119) region. The preS1 (34-59) fragments were the major immunogenic domains in the preS1 region, and the antibodies against these fragments were speculated to be virus-neutralizing. Therefore, the incorporation of preS1 (34-59) fragments into epitope-based HBV vaccines may be efficient for enhancement of immune response. Additionally, the results also imply that there are more complex immune responses to preS1 region and more abundant immunogenic domains in humans.

Animals↗

PubMed1998

[The incidence and structure of congenital anomalies at the Maternity Home State University Hospital, Sofia in the period of 1992-1996].

This is a retrospective study on the dynamics of inborn malformations in University Hospital of Obstetrics and Gynaecology 'Maĭchin Dom', Sofia for a five-years-long period of time (1992-1996). The results show that the rate of inborn anomalies in the discussed period of time remains approximately the same, while there is an increase of the relative part of heavy and life-threatening malformations. They cause death of nearly half of term infants who die in the neonatal period. These facts lead to the conclusion that to decrease perinatal and neonatal mortality, early and exact prenatal diagnosis of inborn malformations is absolutely necessary.

Birth Weight↗

PubMed1998

Effects of long-term application of dopamine HCl on dopamine agonist-induced cAMP production in rat renal cortex.

AIM: To study the effects of long-term application of dopamine HCl (DA) on the functional changes of dopamine receptor subtypes coupled to adenyl cyclase in rat renal cortex. METHODS: cAMP levels were measured by radioimmunoassay as an index of dopamine receptor function. RESULTS: Injection of DA (30 mg.kg-1.d-1, i.p. 30 d) reduced the fenoldopam (Fen) (100 mumol.L-1)-induced increments of cAMP production from the control group of +1.26 +/- 0.04 to the DA-treated group of +0.63 +/- 0.22 nmol.min-1/g tissue and the propyl-butyl-dopamine (PBDA) (100 mumol.L-1)-induced decrements of cAMP production in the presence of Sch-23390 (Sch) from the control group of -0.38 +/- 0.18 to the DA-treated group of -0.11 +/- 0.08 nmol.min-1/g tissue with, however, comparable percentile changes for the 2 groups. Sch blocked both Fen- and PBDA-induced increase in cAMP production, while domperidone (Dom) blocked the decreasing effects of PBDA on cAMP accumulation in the presence of Sch. CONCLUSION: Long-term application of DA produced a marked "down regulation" of both DA1 and DA2 receptors in rat renal cortex with, however, the responsiveness of the remaining receptors unchanged.

Animals↗

PubMed1999

[Reconstruction of mental health services in the Federation of Bosnia-Herzegovina].

The war in Bosnia and Herzegovina has caused severe suffering of the population, and left behind destruction and misery. Hundreds of thousands were killed, ten thousands were severely injured, and almost the whole population has endured severe psychological traumas. The consequences today are numerous stress related psychical disorders, and especially PTSD. The war has almost destroyed the system of psychiatric services, and lead to lack of professional staff. Because of this, after the war, Federal Ministry of Health of Bosnia and Herzegovina has decided to carry out a complete reconstruction of psychiatric services based on new principles. Comprehensive care for improvement of mental health; prevention of mental illness, treatment and rehabilitation of mentally ill, should be transferred from institutions into the community. Consequently Ministry of Health have designed 38 Community Mental Health Centers in the Federation of Bosnia and Herzegovina in connection with already existing Primary Health Care centers (Dom zdravljas). Each of these centers is responsible for mental health in general within a catchment area of 50,000-80,000 inhabitants. A network of Community Mental Health Centers has started to operate. An efficient and useful training of the staff going to work in these centers have been carried out. Nevertheless, there is still significant resistance towards this new approach to mental health services and treatment of people with mental illness in the community. However, many problems related to this new program of community psychiatry have been identified and are under consideration.

Bosnia and Herzegovina↗

PubMed1999

[The history of Jan Gwiazdomorski's "Health House" in Cracow].

Dr Jan Gwiazdomorski founded the first infirmary that was called Health House in Cracow in 1883. In the begining its addresses was No 39 Karmelicka Street, and in 1889 it was moved to No 1 Siemiradzkiego Street. Surgical, ginecological, obstetric and other patients were admitted there except those suffering from contagious diseases and mental disorders. After its founder's death, "Dom Zdrowia" was taken over by surgeon Maksymilian Rutkowski and gynecologist Bruno Wojciechowski who adapted it for new patient's needs. In Health House more than 30 patients could be hospitalized. Before World War I Rutkowski withdrew from the partnerschip. Wojciechowski became the sole owner of the hospital. After his death it became the property of the Sedzimir's. During the Nazi occupation it was managed by Marian Mossler. After the war it was nationalized in 1950 and turned onto the Station of Ambulance Service.

Ambulatory Care Facilities↗

PubMed1999

[The problems and outcome with newborns who are extremely low birth weight, appropriate for gestational age and small for gestational age].

UNLABELLED: The aim of this study is to evaluate the consequences of being extremely low birth weight (ELBW) under 1000 g at birth, small (SGA) or appropriate for gestational age (AGA). METHODOLOGY: A retrospective comparison of two cohorts of ELBW AGA (n = 47) and SGA (n = 38) infants, admitted to the Intensive Care Unite of State Maternity Hospital "Maĭchin Dom" from 01, 1995 to 06, 1998 is carried out. Infants with major congenital anomalies and those, who died in the first two hours of life, being extremely premature and unviable, are excluded. RESULTS AND CONCLUSIONS: The mean birth weight of the AGA group is 863 g, their mean gestational age is 26.6 weeks of gestation and of the SGA group--795 g and 29.6 weeks respectively. In the Sga C-section is preferred in 85%, vs only 34% in the AGA group. SGA babies are with two times greater survival rate (61%) then AGA (32%). The causes of death are similar. The AGA survivors have a greater rate of stage III-IV intraventricular hemorrhage, more prolonged need for ventilatory support (19 vs 12 days for SGA) and oxygen supplementation (37.5 vs 30.7 for the SGA), more difficulties with enteral feeding and their median hospital stay is somewhat longer (81.9 days), compared with those of the SGA (76.6 days). The two groups show a similar rate of respiratory distress syndrome, chronic lung disease, infections and neurological complications among the survivors.

Bulgaria↗

PubMed1999

[The Apgar score, acid-base equilibrium of the umbilical cord vessels and early postnatal adaptation in healthy term newborns].

UNLABELLED: The aim of the study is to establish a correlation between Apgar score, acid-base status (ABS) and blood gases (bg) from cord blood and the early postnatal adaptation in healthy term newborns. The study is prospective and includes 52 babies at term born at the State University Hospital Maĭchin Dom, Sofia during a three month period--03-05, 1998 without evidence of asphyxia before and during delivery. All babies are monitored for Apgar score at minute 1 and 5, ABS and bg from umbilical artery (u.a.) and vein (u.v.) examined at birth, as well as capillary ABS and bg 1 hour after birth. Early postnatal adaptation is judged by a neonatologist in the course of two hours. RESULTS: A significant difference is found between all the examined points in the ABS and the blood gases in samples from umbilical artery and vein (p < 0.05), most significantly differ pH, pO2 and O2 Sat (p < 0.001). There is a correlation between 1 minute Apgar score and ABS and bg from umbilical vessels, babies with 1 minute Apgar score 7 having significantly lower pH from u.a. requiring wider range of resuscitation. Babies with 1 minute Apgar score 9/8 and 5 minute Apgar score 10 have definitely less early adaptational problems. CONCLUSION: The use of a combination of evaluation criteria for the condition of the newborn after birth (Apgar score, ABS and bg from cord blood and strict monitoring of early cardio-pulmonary adaptation) guarantees adequate resuscitation in term babies.

Acid-Base Equilibrium↗

PubMed1999

[The duration and extent of intensive therapy for newborns].

The aim of the study is to evaluate the duration, the extent and the complications of the intensive care of neonates, treated in the Neonatal Intensive Care Unit (NICU) of DUB "Maĭchin Dom" Sofia. Included retrospectively are all 383 neonates, admitted in the NICU for 1995, classified as mature--131, premature stage I--70, stage II--75, stage III--71 and stage IV--36 babies. The duration of the stay is increasing progressively according their weight: from 4 days for the mature children to 15.6 and 18.4 respectively for the newborns with very low and extremely low birth weight. The latter two groups have considerably higher need of ventilatory support (respectively 52.1% and 86.1% of them are ventilated) and higher mean duration of the ventilation--242 and 271 hours. Although they represent 28% of the patients in the NICU, the babies weighting below 1500 g accumulate 74% (17,347 hours) of the whole sum of ventilatory hours in the unit. They also develop more complications due to the immaturity and the assisted ventilation--pneumothorax, bronchopulmonary dysplasia etc. A conclusion is to be made, that the charge of a NICU is due mainly to the premature infants with very low and extremely low birth weight. These babies and the amount of ventilatory support in the unit (as total number of ventilatory hours and ventilated children) can serve as criteria for the extent of loading of the NICU.

Bulgaria↗