Association between molar incisor hypomineralisation and tooth agenesis: a cross-sectional study in Brazilian children and adolescents.

PURPOSE: The aim of the present was to assess the association between MIH and tooth agenesis (TA) in orthodontic patients from the Federal University of Rio Grande do Norte, Natal, Brazil. METHODS: A cross-sectional study was performed to evaluate the presence of MIH and TA in a sample of 371 pretreatment orthodontic records from patients aged 9-18 years. Statistical analyses were performed using the Chi-square and Fisher's exact tests, and logistic regressions. RESULTS: There was a statistically significant association between the prevalence of tooth agenesis and MIH. A higher percentage of third molar agenesis, maxillary premolar agenesis, and mandibular second premolar agenesis was observed among children with MIH-affected teeth. Patients with MIH had a 2.43 times greater chance of third molar agenesis, and a 5.88 times higher likelihood of mandibular premolar agenesis. CONCLUSION: There is a weak association between MIH and TA. Furthermore, the presence of hypomineralised molars increases the risk of tooth agenesis.

Effect of plasma and heat treatments on orange juice quality.

Heat treatment is used in the orange juice industry to neutralize the action of pathogenic microorganisms. However, it can reduce the nutritional value of the juice. Thus, our study assessed the cold plasma treatment as an alternative method against Escherichia coli and Candida albicans in 'Lima' orange juice. Both, plasma and heat treatments, reduced the amount of E. coli in the juice, inactivating 16.72 and 100%, respectively. Plasma did not inactivate C. albicans, but heat treatment inactivated 100%. Plasma and heat treatment increased Hue angle and luminosity (more yellowish juice). Plasma reduced vitamin C, carotenoids, and polyphenols content, while increased flavonoids. Heat treatment reduced the carotenoid content. However, neither heat nor plasma treatment altered the antioxidant activity. The plasma treatment reduced the intensity of color (chroma), the soluble solids content and the acidity ratio, total sugars, and the vitamin C content of juice compared to the heat-treated and control juices. Plasma-treated juice showed increased levels of yellow flavonoids, total phenolics and antioxidant activity until the 12th day of storage.

Environmental effects on collared peccaries (Pecari tajacu) serum testosterone, testicular morphology, and semen quality in the Caatinga biome.

The objective of the study was to understand the influence of climatic variations in a semiarid environment on serum testosterone, testicular morphology and semen quality in collared peccaries (Pecari tajacu). Reproductive metrics (semen quality, testicular morphometry and testosterone serum profiles) of 10 mature males were measured monthly for 18 months. Meteorological data (rainfall, air temperature, relative humidity, wind speed and radiant heat load) also were recorded during the same period. Rainfall regimes were classified in different classes (Class 1: months with no rain; Class 2: months with up to 50 mm of rain; and Class 3: months with >50 mm of rain). Among rainfall classes, average air temperature (°C) and relative humidity (%) were different. Climatic changes between rainfall classes did not lead to overall variations of testicular size, testosterone production, and semen metrics. However, relative humidity recorded before semen collection (one day, one week, or over 51-55 days) was positively correlated (P < 0.05) with semen motility metrics (total motility, beat cross frequency and straightness) and sperm subpopulations (medium and static sperm), as well as with volume. Negative correlations (P < 0.05) were revealed between air temperature and the same semen motility patterns and volume. Additionally, radiant head load measured on the day of semen collection negatively influenced (P < 0.05) sperm straightness. This study demonstrates for the first time that no seasonal changes could be detected overt the 18-month period on the serum testosterone, testicular morphology and semen quality of collared peccaries raised in the Caatinga biome; however, it is expected that long term environmental changes will influence the reproductive physiology of species leaving in that habitat.

Physicochemical characterization and antioxidant activity of decolorized Moringa oleifera Lam leaf flour

BACKGROUND: Maringa oleifera leaves are rich in antioxidant substances; however, when lyophilized leaves were used in flour form in meat products, they presented no antioxidant effect and even accelerated the oxidation process of the product. Thus, the objective of this study was to evaluate the effect of chlorophyll extraction on the physicochemical composition and antioxidant activity of Moringa leaves. METHODS: Moringa leaves were dried and ground in order to obtain uniform flour. A treatment using chlorophyll extraction (decolorized) was tested versus a control treatment(non-decolorized) for proximate composition, instrumental color, and antioxidant activity using ANOVA followed by Tukey'stest. RESULTS: Higher crude fiber, ash, and protein contents were observed for decolorized flour (19.41 and 38.13%, 11.87 and14.02%, and 28.81 and 31.33%, respectively) when compared to those for the control. Chlorophyll extraction significantly affected (p< 0.05) the instrumental color of the leaves flour. The half maximal effective concentration (EC50) of both decolorized and control flour was 3.74 and 4.30 mg/L, respectively. The equivalent of antioxidant per gramof non-decolorized leaves was higher than that observed for the decolorized leaves (0.36 and 0.32 g/g DPPH, respectively). The antioxidant activity (AA%) of the extract from non-decolorized leaves was higher in the concentrations of 5 and 2.5 mg/0.1 mL, while the decolorized leaves was higher in the extract concentration 5 and 2 mg/0.1 ml. CONCLUSION: The decolorization process affected the chemical composition and color of Moringa oleifera leaves flours however did not improve its antioxidant activity

Short-term storage of canine preantral ovarian follicles using a powdered coconut water (ACP)-based medium.

The objective was to investigate the use of powdered coconut water (ACP)-based medium for short-term preservation of canine preantral follicles. Pairs of ovaries from mongrel bitches (n=9) were divided into fragments. One ovarian fragment, treated as a fresh control, was immediately fixed for histological analysis, whereas the other six ovarian fragments were stored either in phosphate-buffered saline (PBS; control group) or ACP medium in isothermal Styrofoam boxes containing biological ice packs. The boxes were sealed and opened only after 12, 24, or 36h. After opening each box, the ovarian fragments were submitted to histological analysis. In total, 12,302 preantral follicles were evaluated, with 64.5% primordial, 33.3% primary, and 2.3% secondary follicles. There were multiple oocytes in 1.3% of the follicles analyzed. At 24h, ACP was more efficient in preserving follicular morphology than PBS (P<0.05). Compared with the fresh control group, a significant reduction in the percentage of morphologically normal ovarian follicles was observed for PBS, starting at 24h; however, the decline started only at 36h for the ACP medium. During the experiment, the temperature inside the isothermal boxes increased from 3 to 9 degrees C (P<0.05), despite a constant room temperature. In conclusion, powdered coconut water (ACP) was an appropriate medium for short-term storage of canine preantral ovarian follicles.

Description of semen characteristics from six-banded armadillos (Euphractus sexcinctus) collected by electroejaculation.

The aim of this study is to describe the characteristics of the semen from six-banded armadillos (Euphractus sexcinctus) collected by electroejaculation. Six mature males were physically restrained and electroejaculated twice for the collection of semen. Semen collected was immediately evaluated for appearance, volume, pH, sperm motility, vigor, morphology, percentage of live sperm and functional membrane integrity by light microscopy. Semen was obtained from all (100%) twelve attempts conducted for electroejaculation. Armadillos' semen had a white-translucent appearance, and great viscosity. Mean values obtained in analysis of the semen were: 353+/-86 microl for volume, 9 for pH, 45+/-14 x 10(6)sperm/ml for concentration, 61+/-7% motile sperm with 2+/-0.2 for vigor, 55+/-7% live sperm, 86+/-2% morphologic normal sperm, and 46+/-6% functional membrane integrity. In conclusion, semen from six-banded armadillos can be efficiently obtained by electroejaculation. The characteristics of semen collected by electroejaculation in six-banded armadillos provide background information that may be useful for assisted breeding programs in the members of the Xenarthra family.

Dimethylformamide is no better than glycerol for cryopreservation of canine semen.

The objective of this study was to compare the effects of dimethylformamide (DMF) and glycerol in canine (Canis lupus familiaris) semen cryopreservation based on postthaw motility and velocity evaluated by computer-assisted sperm analysis (CASA) and the effects on subjective progressive motility, percentage of live sperm, and plasma membrane functional integrity. The semen was diluted in two steps with an egg-yolk Tris extender containing 6% glycerol or DMF, frozen in 0.25-mL straws, and stored in liquid nitrogen. Immediately after thawing, samples were accessed for subjective sperm motility, sperm membrane functional integrity, percentage of live sperm, and evaluation by CASA. There were differences (P<0.05) between glycerol and DMF with regard to subjective progressive motility (43.1% vs. 21.5%), objective progressive motility (11.8% vs. 6.2%), velocity average pathway (31.1 vs. 23.1 microm/sec), and amplitude of lateral head (3.3 vs. 3.9 microm), which confirmed the efficiency of glycerol. In conclusion, objective analysis performed by CASA confirmed that no benefits were derived by using DMF to replace glycerol for cryopreservation of canine semen.

Succession management: a model for developing nursing leaders.

Succession management is critical to all healthcare organizations as they respond to the cost-cutting initiatives brought about by the prospective payment era. This personnel management system ensures that motivated individuals enter and ascend the management hierarchy consistently. Such stabilization is reflected in turnover vacancy rates of < 12 percent and < 9 percent, respectively, at a time of unprecedented competition for professional nurses. This provides not only greater professional advancement but also stability for patient care delivery.

Marketing your nursing product line: reaping the benefits.

Survival in today's cost-conscious, competitive health care scene depends on strategic business skills, marketing, and product line management. As a major contributor to the delivery of health care, nursing practice must now include an orientation toward business with definable products. The authors discuss their success in developing a product line that results in professional growth, improved nurse recruitment and retention, and a greater competitive edge in the health care arena.