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Journal of Sustainability Science and Technology
Published by Universitas Lampung
ISSN : 27983714     EISSN : 27983919     DOI : http://dx.doi.org/10.23960/josst
Core Subject : Science, Engineering,
Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Energy
Journal of Sustainability Science and Technology (JOSST) is a biannual (June and December) international, peer-reviewed journal published by Universitas Lampung. This journal disseminates the findings of innovative research and practices that contribute to the current practices based on either quantitative, qualitative, or mixed-methods approaches, putting emphasis on the theoretical and practical importance and value of subject areas related to science, technology, and the environment. Therefore, it welcomes academics, researchers, and practitioners to submit and publish their original theoretical and practical contributions to the scientific knowledge according to, but not limited to, the following topics: Environment’s pollution control and abatement technology Transport and fate of pollutants in the environment Design and implementation of a technology-rich learning environment Technology and learning innovation Heavy metals and organic compounds in the environment Environmental impact assessment Earth science and engineering Architecture and civil engineering Environmental science Sustainable development Chemistry Applied science Other relevant topics
Arjuna Subject : Ilmu Lingkungan (semua ketegori) - Ilmu Lingkungan (Lain-Lain)
Articles 5 Documents
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Search results for , issue "Vol. 1 No. 2 (2021)" : 5 Documents clear
Induction of Rhizoctonia resistance to odontoglossum ringspot virus (ORSV) infection on orchid leaf organ viability Eka Nuraini Tohari; Mahfut Mahfut; Tundjung Tripeni Handayani; Sri Wahyuningsih
Journal of Sustainability Science and Technology Vol. 1 No. 2 (2021)
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/josst.v1i2.4

Abstract

Orchid plants are in great demand by the public as ornamental plants that have economic value and the beauty of attractive flower shapes and colors, especially Phalaenopsis and Dendrobium. Related to this, conservation efforts are needed through cultivation. However, these efforts are often hampered by viral infections. One of the viruses that trigger inhibition of orchid cultivation that often appears is ORSV. Control efforts that are relatively safe and efficient can utilize mycorrhizae in orchids which play a role in increasing the absorption of plant nutrients. The use of Phalaenopsis and Dendrobium with the induction of Rhizoctonia sp. against ORSV is a very important alternative biofertilizer and biocontrol agent. The objectives of this study were 1) to determine the effectiveness of orchids induced by Rhizoctonia resistance, 2) to determine the viability of orchid leaf organs to ORSV infection, 3) to determine the viability of orchid root organs resulting from Rhizoctonia resistance to ORSV infection. This study was conducted in January 2021 – March 2021 at the Botanical 2 Laboratory, Department of Biology, Faculty of Mathematics and Natural Sciences, University of Lampung. This study employed a completely randomized factorial with 6 treatments and 4 replications. The variable observed in this study was the effectiveness of mycorrhizae, leaf and root length, number of leaves and roots, and leaf width. The data obtained were homogenized using Levene's test and then analyzed by ANOVA and Tukey's further test at the 5% level. The results showed that the effectiveness of mycorrhizae occurred on the 3rd day of incubation. In leaf organs, Phalaenopsis amabilis showed an increased response and Dendrobium discolour showed a decreased response in leaf length, width, and number. Meanwhile, in the root organ, Dendrobium discolour showed an increased response and Phalaenopsis amabilis showed a decreased response in root length and number of roots.
Various ORSV infection symptoms on ceratorhiza induction in orchid plants Mitha Valentina Treesya Panjaitan; Mahfut Mahfut; Tundjung Tripeni Handayani; Sri Wahyuningsih
Journal of Sustainability Science and Technology Vol. 1 No. 2 (2021)
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/josst.v1i2.5

Abstract

Several types of orchids that are in great demand and cultivated by various groups are Phalaenopsis sp. and Dendrobium sp. Mycorrhizae are needed by orchid plants to complete their life cycle. This is because mycorrhizae are capable of symbiosis with the root system of the host plant so that the plant's capacity to absorb elements will increase. This study aims to determine the extent to which Ceratorhiza induction on Phalaenopsis amabilis and Dendrobium discolour orchids can suppress the symptoms of Odontoglossum ringspot virus (ORSV) infection. The method used in this study was a factorial completely randomized design (CRD) with 2 factors and 4 replications. The first factor is the type of orchid used, namely Phalaenopsis amabilis (A1) and Dendrobium discolour (A2), while the second factor is the type of administration of mycorrhizae, viruses, and mycorrhizal viruses. Observation of disease symptoms is done by looking at the symptoms that appear on leaves that have been infected with ORSV. The results showed that the symptoms that appeared in Phalaenopsis amabilis were in the form of mosaic, necrosis, leaf malformation, while in Dendrobium discolour were mosaic and necrotic. Ceratorhiza was not able to suppress the symptoms of disease infection because based on the results obtained; the treatment on orchids inoculated with mycorrhizae and viruses showed more severe symptoms compared to the treatment only inoculated with viruses increased response and Dendrobium discolours showed a decreased response in leaf length, width, and number. Meanwhile, in the root organ, Dendrobium discolour showed an increased response and Phalaenopsis amabilis showed a decreased response in root length and number of roots.
Evaluasi Penggantian Tanah dan Injeksi Grouting Semen Terhadap Penurunan Tanah Arief Andriansyah; Lusmeilia Afriani; Dyah Indriana Kusumastuti; Endro P. Wahono
Journal of Sustainability Science and Technology Vol. 1 No. 2 (2021)
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/josst.v1i2.9

Abstract

This paper discusses the process of original soil stabilization in Trans Sumatra Bakauheni-Terbanggi Besar Toll Road Project Package 2 Sidomulyo-Kotabaru. The soil replacement process was conducted at approximately 24 kilometres along the toll’s main road. The original soil bearing capacity analysis stage was by performing a Dynamic Cone Penetrometer (DCP) and Sondir test to analyze the deep of hard soil. A soil replacement was carried out to replace the original soil with soil that has appropriate specification. the piling up process was conducted in stages, which has Sandstone in such of the layer. The research done about the landfill sample was retaken and collected at 68 points. The stockpile soil samples collection was then followed by the analysis which was conducted in the laboratory to find the soil bearing capacity. There are 4 types of bearing capacity parameters analyzed, namely specific gravity, water content, aggregate analysis (Sieve Analysis), and consistency limit (Atterberg Limit). Referring to it, then there was the classification of soil types according to AASHTO M145 & Casagrande Soil Classification System. A point that has settlement after soil replacement is STA 52+000. So, there need to add soil stabilization, that is cement grout injection. Researchers analyzed the soil settlement by interpretation method. Results showed that soil replacement and cement grout injection could decrease a soil settlement by about 15.07 cm to become 0.93 cm.
Development and validation of chemistry learning videos as learning media in the era of the COVID-19 pandemic Amarulloh Amarulloh; Hisham Dzakiria
Journal of Sustainability Science and Technology Vol. 1 No. 2 (2021)
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/josst.v1i2.12

Abstract

Learning media, especially videos, are very effective in achieving learning objectives, especially during the COVID-19 pandemic. Therefore, this study aims to develop learning videos as learning media during the COVID-19 pandemic. The research was conducted using a development research approach from the Borg & Gall model. The developed product has good validity. Where the results of the content validation test by material experts show the CVR value in the range 0.75 – 0.95 (above the critical CVR value). The construct validity test results have a value in the range 0.75 – 0.95 so that it is included in the valid category. And lastly, the test results for student responses have percentage values in the range of 79% - 89% so that they are included in the interesting and very interesting category. Based on these results, the developed learning video can be used as a learning media solution during the COVID-19 pandemic.
Air quality analysis through measurement of pb levels in blood using atomic absorption spectrophotometer Uitumen Erdenezul
Journal of Sustainability Science and Technology Vol. 1 No. 2 (2021)
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/josst.v1i2.13

Abstract

Air pollution is a problem that needs attention, especially pollution by heavy metals such as lead (Pb). This research was conducted to measure the levels of Pb in the blood of people who do a lot of daily activities on the highway in the Ulaanbaatar region, Mongolia, so that an overview of the level of exposure to Pb in the air is obtained. The study was conducted using an observational method by measuring the blood directly from the participants using an atomic absorption spectrophotometer. The participants involved were 20 people who met the criteria. The results showed that the average level of Pb in the blood of people who had daily activities on the highway was 8.97 ppm. Where the smallest level is 5.12 ppm and the highest level is 12.06 ppm. This value is far above the threshold value determined by WHO, which is 0.05 ppm. Therefore, it can be concluded that the air quality in the Ulaanbaatar area is in the poor category with a high level of Pb exposure.

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