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MORTALITY RATE OF SITOPHILUS ZEAMAIS IN LOW TEMPERATURE STORAGE David Septian Sumanto Marpaung
AGROINTEK Vol 15, No 4 (2021)
Publisher : Agroindustrial Technology, University of Trunojoyo Madura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/agrointek.v15i4.10718

Abstract

Maize is one of important comodities contributed as food consumption and other bioproducts to the world. As high demand of maize in global must be followed its avalaibility in markets. Decline the post-harvest losses along maize distribution will not only keep the avalaibility in markets, but also solve the food security. One of post-harvest losses causes is pest, especially in maize storage. The temperature treatment to control S.zeamais, a major insect found in maize storage, becomes potential action in order to reduces the post-harvest losses. The aim of this study was to investigate the S.zeamais mortality rate and physical changes of maize kernel under low temperature condition. The S.zeamais was cultured within 4 months before used for experiments. The 2 different low temperature conditions and 1 control treatment were used in this study. The results showed that the temperature of maize kernel was changed, indicated the movement of maize from room temperature to low temperature storage is occurred. Furthermore, the low temperature treatments, the maize moisture content was slightly changed compared to the control treatment. In addition, there is no chilling injury issue to maize kernel. However, the unknown mechanism of S.zeamais protection to the low temperature was found in the Low Temperature I treatment through the finding of hole grain. In the mortality rate, the highest mortality rate was found at Low Temperature II treatment (95.30 ±11.54%). These findings suggests that low temperature treatment could be the action for maize pest management, especially in the storage.
A mini review on production of pluripotency factors (Oct4, Sox2, Klf4 and c-Myc) through recombinant protein technology David Septian Sumanto Marpaung; Ayu Oshin Yap Sinaga
Communications in Science and Technology Vol 5 No 1 (2020)
Publisher : Komunitas Ilmuwan dan Profesional Muslim Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (538.566 KB) | DOI: 10.21924/cst.5.1.2020.171

Abstract

The four transcription factors OCT4, SOX2, KLF4 and c-MYC are highly expressed in embryonic stem cells (ESC) and their overexpression can induce pluripotency, the ability to differentiate into all cell types of an organism. The ectopic expression such transcription factors could reprogram somatic stem cells become induced pluripotency stem cells (iPSC), an embryonic stem cells-like. Production of recombinant pluripotency factors gain interests due to high demand from generation of induced pluripotent stem cells in regenerative medical therapy recently. This review will focus on demonstrate the recent advances in recombinant pluripotency factor production using various host.
Pengaruh Pemberian Pupuk Organik Urin Kelinci Terhadap Pertumbuhan Tanaman Kangkung Darat (Ipomoea Reptans): The Effect of Rabbit Urine Organic Fertilizer on The Growth of Land Kale Plants (Ipomoea Reptans) Via Rahmatul Ummah; David Septian Sumanto Marpaung
Jurnal Agroekoteknologi dan Agribisnis Vol. 5 No. 2 (2021): Jurnal Agroekoteknologi dan Agribisnis
Publisher : Politeknik Pertanian Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51852/jaa.v5i2.484

Abstract

The use of organic fertilizer is one solution to solve the problem of lack of nutrients in the soil, taking into account the sustainability aspect. Rabbit droppings are obtained from rabbit breeders at P4S Agro Cendekia Bangunrejo. The study was conducted in July 2021 at P4S Agro Cendekia Bangunrejo. Liquid organic fertilizer is made by two different methods namely Y1 (a mixture of 10 liters of rabbit urine, 150 grams of brown sugar and 0.2 liters of EM3) with a fermentation time of 7 days and a pH of 7.5 and Y2 (a mixture of 10 liters of rabbit urine, 150 grams of brown sugar, 0.2 liters of EM3 and bamboo root) with a fermentation time of 6 days and a pH of 7.3. There are three treatments, namely P1 as an experimental control (without the provision of liquid organic fertilizer), P2 is given liquid organic fertilizer Y1, P3 is given liquid organic fertilizer Y2. Each treatment was randomly taken as many as 5 samples to be used as the object of the study. The parameters of the growth of kale plants analyzed after 10 hst (days after planting) are plant height, number of leaves, length of roots and number of roots. From the research data obtained, the highest average plant height is in the P2 treatment with a value of 8.12 cm. The average number of leaves is the largest in the P2 treatment as many as 5 stems. The average length of the highest root is in P3 at 8.46 cm. The average number of roots obtained in the P2 treatment is 29 branches. Liquid organic fertilizer of rabbit urine affects the growth of kale plants. Keywords: Growth, growth of rabbit urine, rabbit urine