Effects of ephedrine, caffeine, and their combination on muscular endurance.

Purpose: The purpose of this study was to investigate the effects of ingesting caffeine (C), ephedrine (E), and their combination on muscular endurance, using a double-blind, repeated measures design.

Methods: Ninety minutes after ingesting either C (4 mg x kg-1), E (0.8 mg x kg-1), a combination of C+E, or a placebo (P), 13 male subjects performed a weight-training circuit consisting of three supersets (SS), each SS consisting of leg press (at 80% of 1 RM to exhaustion) followed by bench press (at 70% 1-RM to exhaustion); 2 min of rest intervened between SS.

Current management of Helicobacter pylori infection.

Helicobacter pylori infection continues to be one of the hottest topics in gastroenterology, challenging the primary care physician daily with the clinical application of its new developments and frequency of involvement in differential diagnosis. This article offers the primary care physician a practical approach to the dyspeptic office patient that emphasizes the differential diagnosis of H pylori. Included is a strategy for rapid patient evaluation through key questions in the history, simple maneuvers in the physical examination, and a logical approach to testing and therapy based on the latest literature.

Genetic-economic evaluation of traits in a goose meat enterprise.

1. Goose can be considered as an additional and inexpensive meat source, provided that the marketing age does not exceed 8 weeks. Using the ability of geese to eat grass may reduce the intake of concentrated food up to 30%.

The relative energy requirement of male vs female broilers and turkeys.

Three models to estimate energy requirement as a function of growth curve pattern were applied to controlled experimental data of male vs female of broilers and turkeys. The share of maintenance out of total feed requirement was 55% for the average of the three models with major divergence due to age. Comparison of the ratio between actual and estimated feed consumption reveals that the relative energy requirement was always lower in females than in males in the range of 5 to 10% for the three models, with an average of 7.

Incremental changes in and distribution of chick weight with hen age in four poultry species.

1. It is proposed that a general biological pattern exists for chick weight increase with hen age for the various commercial species of poultry and that one general equation can be used for the estimation of chick weight increment. 2.

The effect of a feature of regression disturbance on the efficiency of fitting growth curves.

Growth curve parameters are usually estimated by employing non-linear regression. In the present study this method was found to be inefficient for fitting growth curves, since the magnitude of random deviations of body weight greatly increases with age (heteroskedastic regression disturbance). Simulated samples of broiler body weights at different ages were generated and the associated Gompertz growth curve parameters were estimated employing three methods.

Increment of egg weight with hen age in various commercial avian species.

1. The present study indicates that a common biological pattern exists for egg weight increase with hen age for the various commercial avian species, breeds and strains at their first laying cycle. Therefore, one common equation can be used for the estimation of egg weight increase.

An algorithm to fit the Gompertz function to growth curves.

An algorithm to fit the Gompertz growth function is presented. This algorithm is easy to program on a microcomputer. The algorithm is based on employing a searching technique to solve a set of equations derived from the Gompertz function.

Lomefloxacin concentrations in bone after a single oral dose.

We studied the penetration characteristics of lomefloxacin in bone in 30 patients with osteoarthritis undergoing total hip replacement. Patients were given a single oral 400 mg dose at various times from 1 to 12 hours prior to removal of bone samples. The peak plasma and bone (subchondral bone from femoral head) concentrations reached approximately 4.

Revision total hip arthroplasty with titanium ingrowth prosthesis and bone grafting for failed cemented femoral component loosening.

Fifty-seven hips (55 patients) had revision for failed cemented femoral component loosening using titanium ingrowth femoral components and cancellous bone grafting. The patients' average age was 59 years (range, 25-86 years), and the average follow-up period was 2.8 years (range, two to six years).

Late infections of total joint prostheses. A review and recommendations for prevention.

The incidence of late infection of total joint prostheses is 0.6%. Because this incidence has increased from 0.

Penetration of cephalosporins into bone.

The penetration characteristics of cefazolin and cephradine in human bone were determined in 35 patients undergoing total knee replacement. The results were compared to previously reported data on patients undergoing total hip replacement. The time required to achieve peak bone levels in total knee replacement was less than in total hip replacement.

Genetic-economic evaluation of traits in a broiler enterprise: reduction of food intake due to increased growth rate.

Separate mathematical models for food consumption and growth pattern of broilers were used to derive a combined model to estimate food consumption during the growth period. The model was used to show that each reduction of one day in reaching a fixed body weight would reduce food consumption per bird by 50 to 60 g. Broiler lines with a slow growth rate at an early age and rapid growth rate near market age require appreciably less food overall.

Genetic-economic evaluation of traits in a broiler enterprise: the relative genetic-economic values.

Selection for growth rate and food utilisation (assuming annual genetic gains of 3 and 1.5% respectively) have about the same economic value and account for 94.3% of the annual potential economic savings in the production costs of an integrated broiler enterprise.

The penetration characteristics of cefazolin, cephalothin, and cephradine into bone in patients undergoing total hip replacement.

Preoperatively, to prevent infection, seventy-one patients who were to have total hip arthroplasty were given one gram of cephalothin, cephradine, or cefazolin intravenously. Simultaneous samples of bone and serum were obtained after various time intervals and assayed for cephalosporin concentration to correlate the antibiotic concentrations in these sites with time. Of the cephalosporins tested, cefazolin achieved the highest total peak levels in bone (thirty micrograms per gram), followed in descending order by cephradine (twenty-three micrograms per gram) and cephalothin (2.