Journal of Science and Technology CRRU

Calculation of the time-dependent energy in capacitor in RC circuit via electromotive force sine function sin2(wt)

Artit Hutem — Fri, 27 Dec 2024 00:00:00 +0700

This research purposed to represent the method of the time-dependent energy in capacitor under electromotive force in RC circuit. In this research, used the method of electrical circuit analysis using the Kirchhoff’s law and the non-homogeneous first linear differential equation. The integration method was used to calculate the electrical charge. The results of calculation the time-dependent energy in capacitor value is directly proportional to the capacitor and resistance of

On the Solutions of the Diophantine Equations (p-1)^x+2.p^y=z^2 and (p-1)^x-2.p^y=z^2

Suton Tadee — Fri, 27 Dec 2024 00:00:00 +0700

Let be a prime number and be non-negative integers. We show that the Diophantine equation has all non-negative integer solutions, which are and , where is a non-negative integer. The Diophantine equation has all non-negative integer solutions, which are and , where such that is an integer.

Calculation of the time-dependent energy in inductor in RL circuit series via electromotive force cos2(wt)

Artit Hutem — Fri, 27 Dec 2024 00:00:00 +0700

This research purposed to represent the method of the time-dependent energy magnetics field inductor under electromotive force in RL circuit. In this research, used the method of electrical circuit analysis using the Kirchhoff’s law and the non-homogeneous first linear differential equation. The integration method was used to calculate the total current . The results of calculation the time-dependent energy in inductor value is directly proportional to the inductor. The current is inversely proportional to the inductor. The electric charge is inversely proportional to the inductor.

Comparison of the effects of traditional and modern drying methods on the physical and chemical properties, tannin content, and nutritional value of Mali-ong cultivar Namwa bananas flour

Danchai Kreungngern — Fri, 27 Dec 2024 00:00:00 +0700

The essential qualities of banana flour are its color and tannins, which are anti-inflammatory and antioxidants. Therefore, the novel drying method requires a white-yellow color and the highest tannin content in Namwa banana flour. This research aimed to pre-treat Namwa bananas with and without peels and blanch them for 5 and 10 minutes. Using 400 watts of infrared in 650 mmHg of vacuum (IR-VC) and 24 hours for freeze drying (FD) to dry Namwa bananas flour. The pre-treatment involved blanching peeled bananas flour for 5 minutes before drying them using IR-VC and FD methods. This resulted in a brightness (L*) value of 76.31 and 81.78, a high yellow color value (b*) of 17.16 and 16.60, and a high tannin content of 123 and 207 mg of tannin per 100 grams of dry flour, respectively. Therefore, this condition was used to prepare the sample for banana flour production. The comparison was made between banana flour products from IR-VC and FD drying methods and the nutritional value of products from solar dome (SD) and hot air (HA) drying methods. It was found FD banana flour had a high overall nutritional value compared to the other methods, containing 28.33 micrograms of vitamin A and 1.50 milligrams of vitamin B2 per 100 grams of banana flour. The highest fiber content was observed in SD drying 31.23 grams per 100 grams of banana flour. The IR-VC drying method exhibited the highest protein content 5.14 grams per 100 grams of banana flour and showed no cholesterol content in the banana flour produced using IR-VC and FD drying methods.

Species Diversity of Plants in the Western Forest Complex Corridor of Khlong Wang Chao National Park and Khao Sanam Phriang Wildlife Sanctuary

Fri, 27 Dec 2024 00:00:00 +0700

The western forest connecting area between Khlong Wang Chao National Park and Khao Sanam Phriang Wildlife Sanctuary, Kamphaeng Phet Province. It is another forest area that still has many types of plants and wildlife. The land cover types were divided into dry evergreen forest and mixed forest. The area size was 31.83 Km², which has a total community forest area of 13.58 Km², consisting of the Ban Rai Phichit community forest area, with the highest area of 5.50 Km², followed by the Ban Nong Bua Samakkhi, Ban Pang Khanun and Ban Nong Daen community forest have area were 4.91, 1.94, and 1.22 Km², respectively. A total of 136 plots were used to survey the diversity, dominant, and density of plants, it was found that the total number of species was 51 families and 186 species. The total density of plants was 1,421 tree/ha. The most common plant species was Fabaceae, 32 species. The dominant of plants was Shorea siamensis Miq. A survey of diverse species by community forest area found that the Ban Rai Phichit community forest area values 35 families and 105 species. The density of plants was 1,271 tree/ha. The dominant of plants was the Shorea obtuse Wall. ex Blume. The Ban Nong Bua Samakkhi community forest area was 32 families and 85 species. The density of plants was 1,306 tree/ha. The dominant of plants was Shorea siamensis Miq. The Ban Pang Khanun community forest area was 34 families and 102 species. The density of plants was 1,734 tree/ha. The dominant of plants was Shorea siamensis Miq. The Ban Nong Daen community forest area was 36 families and 81 species. The density of plants was 1,859 tree/ha. The dominant of plants was Shorea siamensis Miq.

Anesthesia in ornamental fish for clinical examination and treatment

Sitthichon Rattanachan — Fri, 27 Dec 2024 00:00:00 +0700

The initial step of health status evaluation in ornamental fish in the veterinary clinic or hospital is physical restraint during the clinical examination. However, unexpected problems such as stress and injury among examined fish and practitioners might happen. Therefore, chemical restraint by anesthesia is aimed at veterinary work, for example; physical examination, tissue and blood sampling, and drug administration. The unconsciousness of fish during anesthesia occurs due to depression of the central nervous system or blockage of the sensory nerve pulse depending on the concentration of anesthetic agents, which can be categorized into 4 levels of anesthesia including level 1: sedation, level 2: narcosis, level 3: anesthesia, and level 4: medullary collapse. In addition, there are 3 planes at the stage of anesthesia namely plane 1: light anesthesia, plane 2: moderate anesthesia, and plane 3: deep anesthesia. Practically, the recommended level or stage of anesthesia for fish examination that causes total insensibility is stage 3 plane 2 suitable for fish examination and soft surgery. To date, the common anesthetics used for aquatic animal restraints include MS-222, eugenol, benzocaine, phenoxyethanol, and quinaldine, which must be prepared as a stock solution with proper pH adjustment before dissolving into the water of an anesthetic tank. In addition, there are some important considerations for practical anesthesia in fish during process including preparation of both fish and practitioner before anesthesia, anesthesia, and health assessment, and the recovery of fish post insentient.