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Atika
Department of Public Health and Preventive Medicine, Faculty of Medicine, Universitas Airlangga, Surabaya, Indonesia
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Effect of Short-Term Extra Maltodextrin during a Diet Break on the Resistance Training Performance of Rattus norvegicus Muhammad Irfan Indiarto; Irfiansyah Irwadi; Lina Lukitasari; Atika
Folia Medica Indonesiana Vol. 59 No. 4 (2023): December
Publisher : Universitas Airlangga

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20473/fmi.v59i4.39677

Abstract

Highlights: 1. The ongoing advancement of dietary research has significant importance in the exploration of strategies to optimize the impact of nutrition on performance during resistance training.2. This study provides a prompt for future research to explore the effectiveness of incorporating an additional dietary strategy that may enhance resistance training performance.   Abstract: Poor diet with a purpose to lose a certain body weight or body fat can impair muscle protein synthesis. This results in muscle loss and poor performance in physical training, particularly resistance training. This study aimed to determine the short-term effect of extra carbohydrates, specifically in the form of maltodextrin, during a diet break on the resistance training performanced by rats. This study was an experimental laboratory study with a randomized posttest-only control group design. Twenty-seven male rats, aged 3 months with a weight range of 140–165 g, were randomly and equally assigned into three groups: KN (standard diet), KP (75% calorie intake), and K1 (65% calorie intake with a diet break and extra maltodextrin every week). These diets were administered for four weeks, during which the rats had ad libitum feeding. Additionally, the rats underwent ladder-climbing training three times a week. The body weight was measured pre- and post-treatment, while the performance in resistance training was evaluated post-intervention using a ladder climbing platform. There was no significant difference in the weight before and after treatment, with p>0.05 for the increments (∆) among KN (14.00±9.89 g), KP (13±9.5 g), and K1 (20.89±14.77 g). According to the posttest assessment results, only 17 out of 27 rats succeeded in the maximum weightlifting test. This study showed that a short-term high-carbohydrate diet break does not improve the resistance training performance of rats. Further research is necessary to ascertain the outcomes of the treatment implemented over an extended period of time. 
Antibiotic-Producing Streptomyces sp. Isolated from the Soil of a Mangrove Ecosystem Wiwin Retnowati; Ni Made Mertaniasih; Marijam Purwanta; Nurul Wiqoyah; Atika; Sekar Maharani; Wilda Mahdani
Folia Medica Indonesiana Vol. 59 No. 3 (2023): September
Publisher : Universitas Airlangga

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20473/fmi.v59i3.45806

Abstract

Highlights: 1. The unexplored soil of mangrove ecosystems in Surabaya, Indonesia, has the potential to be home to biodiversity,including Streptomyces sp. that can produce antibiotics.2. Streptomyces sp. has antibacterial properties against Gram-positive and Gram-negative bacteria, and the duration ofincubation plays a critical role in regulating the antibacterial activity.   Abstract A mangrove ecosystem in Surabaya, Indonesia, has a high salinity, pH, potassium, phosphorus, and nitrate contents. This ecosystem comprises a mixture of sand, dust, mud, and clay, which has the potential to be a conducive environment for the isolation of Streptomyces. The importance of Streptomyces in biotechnology lies in its ability to produce bioactive secondary metabolites, which represent a valuable reservoir of antibiotics. This research aimed to assess the antibiotic activity exhibited by Streptomyces sp. isolated from the soil of a mangrove ecosystem in Wonorejo, Surabaya, Indonesia. The analysis focused on the potential of Streptomyces sp. to produce antibiotics that work against Gram-positive bacteria (i.e., Staphylococcus aureus ATCC 25923 and Bacillus subtilis) as well as Gram-negative bacteria (i.e., Escherichia coli ATCC 25922, Pseudomonas aeruginosa ATCC 27853, and Salmonella Typhimurium). The antibacterial activity test was conducted using the modified agar diffusion method. Observations were performed to identify any clear zone formation around the Streptomyces sp. agar colonies with a diameter of 0.8 cm and a height of 3 mm. The clear zone diameter was measured every 24 hours during the 10-day incubation period to assess the diversity of antibacterial activity. The antibacterial profile of Streptomyces sp. exhibited varying levels of activity against different bacterial strains in the tests conducted. The inhibition zone diameters demonstrated the highest levels of activity in Bacillus subtilis (15.9 mm) on day 7, Staphylococcus aureus (27.6 mm) on day 2, Pseudomonas aeruginosa (24.3 mm) on day 7, Escherichia coli (29.2 mm) on day 5, and Salmonella Typhimurium (27.5 mm) on day 7. The results indicated that Streptomyces sp. had inhibitory effects against Gram-positive bacteria as well as Gram-negative bacteria. In conclusion, Streptomyces sp. is a source of biodiversity found in the soil of mangrove ecosystems and has the ability to produce antibiotics.
Co-Authors Irwadi, Irfiansyah Lukitasari, Lina Muhammad Irfan Indiarto Ni Made Mertaniasih Nurul Wiqoyah, Nurul Purwanta, Marijam Sekar Maharani Wilda Mahdani Wiwin Retnowati