Influence of Brand Awareness, Brand Ambassador, on Purchase Decision Supported By Trust As The Intervening Variable on Shopee Marketplace

Background: Nowadays, in the era of globalization, most Indonesian people are already aware of the changes in globalization. In further developments, the internet began to be used in all fields, including business. With the development of technology like this, more and more e-commerce and marketing companies and the number of internet users are increasing in Indonesia. This research is important due to inconsistencies in previous findings, which present both positive and negative results, so researchers try to take advantage of this gap to conduct further researchPurpose: The aim of this research is to determine the influence of Brand Awareness, Brand Ambassador, on Purchase Decision supported by Trust as the Intervening Variable on Shopee MarketplaceDesign/methodology/approach: This research determined 335 staff as the sample and implemented probability sampling processing simple random sampling methods applying Slovin Formula. The research is implementing AMOS 24 program as data analysis, and SEM AMOS approach in testing the hypothesisFindings/Result: The findings the brand awareness had a positive impact in partial towards purchase decisions. Brand ambassadors positively influence the trust, trust has an effect towards purchase decision, and brand awareness influence indirectly towards purchase decision which is mediated by trust in the Marketplace Shopee for staff of PT. XYZ IndonesiaConclusion: This study is to determine the effect of Brand Awareness, Brand Ambassador, on Purchase Decision with the support of Trust as an Intervening Variable on the Shopee Marketplace. The conclusion of the study is that Brand Awareness, Brand Ambassador have an effect on Purchase Decision with the support of Trust as an Intervening Variable on the Shopee MarketplaceOriginality/value (State of the art): This study makes a novel contribution by the integration of brand awareness, brand ambassadors and trust within the digital marketplace. While previous research literature revealed that brand awareness and brand ambassadors have an impact in the context of virtual marketplace but no attention was found on understanding the mediating role of trust in virtual purchasing decision Keywords: brand awareness, brand ambassador, purchase decision, trust, SEM-AMO

Assessing the Relationship Between Land Surface Temperature and Vegetation Index During Revegetation Activities: A Remote Sensing Study on Berau Regency, East Kalimantan (2015-2021)

Coal mining, particularly open-pit mining methods, induces severe environmental degradation, including deforestation, loss of flora and fauna, and soil erosion. Consequently, extensive revegetation efforts are necessary to restore and rehabilitate the damaged vegetation. This study uses remote sensing techniques to investigate the correlation between land surface temperature (LST) and vegetation density over six years of revegetation activities. Temporal Landsat 8 imagery from 2015 to 2021 was used for data analysis. Image processing involved transforming the Normalized Difference Vegetation Index (NDVI) and extracting LST data. Statistical correlation analysis using Pearson correlation was employed to analyze the data. Results indicate a notable decline in land surface temperature at the project site from 2015 to 2021, attributed to the gradual reduction of open spaces from coal mining activities, which were gradually replaced by vegetation cover. Concurrently, NDVI values at the site significantly increased over the same period, indicating the successful transition from barren land to vegetated land. Moreover, a substantial correlation between LST and NDVI values was observed, as denoted by Pearson coefficient exceeding 0.7, with a strong negative correlation. This underscores the significant relationship between vegetation cover and land surface temperature dynamics. These findings emphasize the effectiveness of revegetation efforts in mitigating the adverse impacts of coal mining on the environment. They highlight the crucial role of remote sensing in monitoring and assessing the progress of rehabilitation activities, guiding future revegetation strategies for sustainable land management and ecosystem restoration

Aktivitas Fisiologis Cincau Hijau Perdu (Premna oblongifolia) pada Pemberian Mikoriza dan Biochar Serat Aren: Physiological Activity of Green Grass Jelly Shrub (Premna oblongifolia) to Mycorrhiza and Palm Fiber Biochar Application

Green grass jelly shrub is a plant that has various benefits, so market demand for this plant continues to increase every year. On the other hand, the production of green grass jelly shrub has decreased so the market demand for this plant cannot be met. This study aims to determine the interaction between the dose of mycorrhiza and palm fiber biochar composition on the physiological activity of green grass jelly shrubs. Research with experimental methods was conducted in Greenhouse, Faculty of Agriculture, Universitas Sebelas Maret, June-October 2023. The method used was a two-factor randomized complete block design (RCBD) and 3 replicates. The first factor was the dose of mycorrhizal fertilizer (0, 5, 10, and 15 g plant-1) and the composition of planting media [soil (control), soil:palm fiber biochar (1:1), soil:palm fiber biochar (1:2), and soil:palm fiber biochar (2:1)]. Data experiments were analyzed using analysis of variance at the 5% error level and followed by Duncan’s Multiple Range Test at the 5% error level. The results showed that the dose of mycorrhiza 15 g plant-1 gave better results on plant height, weight of dry, number of stomata, and width of stomatal openings. Treatment of the composition planting media soil: palm fiber biochar with a ratio of 2:1 gave better results on stomatal opening width.   Keywords: Phosphate, pectin, stomatal, transpiration, VerbenaceaeCincau hijau merupakan tanaman yang memiliki beragam manfaat sehingga permintaan pasar terhadap tanaman ini terus mengalami peningkatan setiap tahun. Di sisi lain, produksi tanaman cincau hijau perdu justru mengalami penurunan sehingga permintaan pasar terhadap tanaman ini belum dapat terpenuhi. Penelitian ini bertujuan mengetahui interaksi antara dosis mikoriza dan komposisi biochar serat aren terhadap aktivitas fisiologis tanaman cincau hijau perdu. Penelitian dilaksanakan di Rumah Kaca, Fakultas Pertanian, Universitas Sebelas Maret pada bulan Juni-Oktober 2023. Metode yang digunakan adalah rancangan acak kelompok lengkap (RAKL) dua faktor dengan 3 kali ulangan. Faktor pertama adalah dosis mikoriza (0, 5, 10, dan 15 g tanaman-1) dan faktor kedua adalah komposisi media tanam [tanah (kontrol), tanah:biochar serat aren (1:1), tanah:biochar serat aren (1:2), dan tanah:biochar serat aren (2:1)]. Data hasil percobaan dianalisis menggunakan analisis ragam ANOVA pada taraf kesalahan 5% yang dilanjutkan dengan uji Duncan’s Multiple Range Test (DMRT) pada taraf kesalahan 5%. Hasil penelitian menunjukkan bahwa dosis mikoriza 15 g tanaman-1 memberikan hasil yang lebih baik terhadap jumlah stomata dan lebar bukaan stomata. Perlakuan komposisi media tanam tanah : biochar serat aren dengan perbandingan 2:1 memberikan hasil yang lebih baik terhadap lebar bukaan stomata.Kata kunci: fosfat, pektin, stomata, transpirasi, Verbenacea

SUITABILITY AND CARRYING CAPACITY OF MANGROVE ECOTOURISM IN KAMPUNG NIPAH, SEI NAGALAWAN VILLAGE, NORTH SUMATRA: KESESUAIAN DAN DAYA DUKUNG EKOWISATA MANGROVE DI KAMPUNG NIPAH, DESA SEI NAGALAWAN, SUMATRA UTARA

Ekosistem mangrove merupakan ekosistem yang rentan terhadap kerusakan, sehingga upaya konservasi sangat diperlukan. Pengembangan ekowisata mangrove menjadi salah satu upaya pemanfaatan jasa ekosistem secara berkelanjutan tanpa merusaknya. Ekowisata di ekosistem mangrove dianggap dapat berintegrasi dengan upaya konservasi, sehingga mendukung perlindungan ekosistem. Penelitian ini bertujuan untuk menilai kesesuaian dan daya dukung ekowisata mangrove di Kampung Nipah, Desa Sei Nagalawan, Sumatra Utara. Penelitian dilakukan pada Juli 2023 di kawasan ekowisata mangrove Kampung Nipah. Lokasi penelitian dipilih menggunakan metode purposive sampling, yang terdiri atas tiga stasiun. Data ekologi dikumpulkan melalui metode transek mangrove untuk memperoleh data primer. Metode deskriptif digunakan untuk menganalisis indeks kesesuaian wisata (IKW) dan daya dukung kawasan (DDK). Hasil perhitungan menunjukkan bahwa kawasan ekowisata mangrove Kampung Nipah untuk 3 stasiun adalah 1,97; 1,87; dan 1,87; serta DDK sebesar 200 orang per hari. Artinya, secara keseluruhan ekowisata mangrove Kampung Nipah, Desa Sei Nagalawan termasuk ke dalam kategori tidak sesuai. Beberapa rekomendasi yang dapat diterapkan meliputi memperluas area hutan mangrove sehingga ketebalan ekosistem meningkat dan mempertahankan jumlah kunjungan wisatawan dengan sistem kuota untuk mendukung kelestarian kawasan.Mangrove ecosystems are highly vulnerable to damage, making their conservation crucial. The development of mangrove ecotourism serves as an approach to utilizing ecosystem services sustainably without causing harm. Ecotourism in mangrove ecosystems is beneficial as it synergizes with conservation efforts to protect the ecosystems. This study aims to assess the suitability and carrying capacity of mangrove ecotourism in Kampung Nipah, Sei Nagalawan Village of North Sumatra. The research was conducted in July 2023 within the mangrove ecotourism area of Kampung Nipah. The research location was selected using the purposive sampling method, consisting of three stations.  Primary ecological data were collected through the transect method. The descriptive method was applied to analyze the tourism suitability index (TSI) and the spatial carrying capacity (SCC). The results indicate that the TSI values for the three substations were 1.97, 1.87, and 1.87 out of 3, while the SCC (carrying capacity) was 200 people per day. Based on these findings, the mangrove ecotourism area in Kampung Nipah, Sei Nagalawan Village, is conditionally suitable for tourism. The following recommendations can be implemented to expand the mangrove area to increase ecosystem thickness and maintain a visitor quota system to regulate tourist numbers and ensure sustainability

Growth and yield of sweet corn intercropping with caisim of different plant densities and planting times

Intercropping of sweet corn and caisim is an effort to improve land efficiency. The study aimed to determine the land use optimization of intercropping between sweet corn and caisim from different plant densities and planting times. Research was carried out from May to July 2024, in Bocek Village, Malang, East Java. The study used a randomized complete block design with a single factor consisting of 7 treatments, i.e., monoculture sweet corn, and sweet corn + caisim (1 and 2 rows) planted 7 days before, at the same time, and 7 days after planting corn. Results showed that all intercropping treatments resulted in R/C ratio and LER values > 1, with the highest values observed of sweet corn + caisim of 1 row planting at the same time. The R/C ratio was 1.22 and the LER was 1.35, indicating that land use was optimized without causing a decline in growth or production for either crop. Keywords: cropping system, LER, number of rows, R/C ratio, Zea may

Genome-wide Analysis of CONSTANS-like (CqCOL) Transcription Factors in Quinoa (Chenopodium quinoa): Structural Diversity, Phylogeny, and Stress-Responsive Expression

Quinoa (Chenopodium quinoa) is an ancient grain renowned for its remarkable nutritional value and remarkable adaptability to diverse environmental conditions, making it a valuable crop for enhancing food security. Understanding the molecular mechanisms triggering its development and stress responses is crucial for crop improvement. This study conducted a comprehensive analysis of the CONSTANS-like (CqCOL) transcription factors in quinoa, which play a pivotal role in photoperiodic flowering regulation. We identified and characterized 20 CqCOL genes, analyzing their physicochemical properties, phylogenetic relationships, gene structures, and promoter regions. Our findings revealed significant diversity among the CqCOL proteins and suggested potential functional specialization within the family. Promoter analysis uncovered various stress-responsive and phytohormone-responsive cis-regulatory elements, revealing that CqCOL genes may be associated with stress adaptation and hormonal signaling pathways. Transcriptomic analyses under different conditions supported these insights, highlighting the importance of CqCOL genes in quinoa's developmental processes and stress responses. Specifically, most CqCOL genes exhibited stable expression under heat stress, except CqCOL02 and CqCOL12, which were induced in roots by 1.85- and 1.91-fold, respectively. Under normal conditions, CqCOL01, CqCOL11, and CqCOL18 showed organ-specific expression, particularly in flowers and leaves, with no expression detected in roots. This study enhances our understanding of the CqCOL transcription factor family. It provides a foundation for future functional studies and breeding strategies aimed at improving stress tolerance and optimizing flowering time in quinoa

Species Diversity of Genus Aspergillus, Endophytic Fungal Isolated From Mangrove Ceriops tagal and their Antibiotic Potential

The rapid increase in antimicrobial resistance has encouraged development of new natural and urgent strategies to fight drug-resistant pathogens, one of which is using endophytic fungi. Endophytic fungi found in Ceriops tagal mangrove plant, which can adapt to extreme salinity environments of up to 60 ppt. Endophytic fungi are isolated from leaves, branch, and roots. Each isolate was identified morphologically and cultured in potato dextrose broth media for 21 days. After incubation, liquid culture was extracted with ethyl acetate and evaporated to obtain a thick extract. The Kirby Bauer method was used to evaluate the antibiotic potential of each endophytic fungal extract against pathogenic microbes Staphylococcus aureus, Escherichia coli, and Candida albicans. Concentration used was 5%, antibiotics used as positive controls were chloramphenicol (30μg/disk), nystatin (100 IU/disk), as negative controls DMSO. Three endophytic fungi were isolated from roots (ECT7, ECT 8, ECT 10), two from leaves (ECT 26, ECT 28) and six from branches (ECT 31, ECT 47, ECT 48, ECT 51, ECT 55 and ECT 85). Fungal isolates ECT10 has been proven to effectively exhibit strong antibiotic activity against microorganisms E. coli, S. aureus, and C. albicans, with inhibition zones measuring 13.0 mm, 11.8 mm, and 11.6 mm, respectively

Domestic Pigs as an Animal Model of Myocardial Infarction: a Comparison of Systolic and Diastolic Blood Flow Velocities of Cardiac Valves

Cardiovascular disease (CVD) is still the leading cause of death according to WHO in 2021. CVD generally results in myocardial infarction (MI), which occurred after tissue ischemia. Echocardiography is most likely a diagnostic tool without invasive effects. This study aimed to compare the blood flow in pig research animals treated with ligases of the circumflex arteries. Measurements were made in the mitral valve (MV), tricuspid valve (TV), semilunar pulmonary valve (SLP), and semilunar aortic valve (AO) of velocity during systole (Vs), velocity during diastole (Vd), time average peak velocity (TAMAX), and blood flow pressure at three-time points: before ligase treatment, after acute infarction (60 min), and 8 weeks after ligase treatment. All parameters in MV group increased at 60 min and decreased at 8th weeks. On TV, TAMAX and pTAMAX decreased at 60 min and week 8. In SLP, VS, pVS, and Vd decreased at 60 min and increased at 8th week. The pVd and pTAMAX parameters decreased at 60 min and 8th week, while TAMAX increased at 60 min and decreased at 8th week. In AO, the TAMAX and pTAMAX parameters increased at 60 min and 8 weeks; the other parameters were similar to MV and TV patterns.Cardiovascular disease (CVD) is still the leading cause of death according to WHO in 2021. CVD generally results in myocardial infarction (MI), which occurred after tissue ischemia. Echocardiography is most likely a diagnostic tool without invasive effects. This study aimed to compare the blood flow in pig research animals treated with ligases of the circumflex arteries. Measurements were made in the mitral valve (MV), tricuspid valve (TV), semilunar pulmonary valve (SLP), and semilunar aortic valve (AO) of velocity during systole (Vs), velocity during diastole (Vd), time average peak velocity (TAMAX), and blood flow pressure at three-time points: before ligase treatment, after acute infarction (60 min), and 8 weeks after ligase treatment. All parameters in MV group increased at 60 min and decreased at 8th weeks. On TV, TAMAX and pTAMAX decreased at 60 min and week 8. In SLP, VS, pVS, and Vd decreased at 60 min and increased at 8th week. The pVd and pTAMAX parameters decreased at 60 min and 8th week, while TAMAX increased at 60 min and decreased at 8th week. In AO, the TAMAX and pTAMAX parameters increased at 60 min and 8 weeks; the other parameters were similar to MV and TV patterns

Respon Pertumbuhan Trembesi (Samanea saman (Jacq.) Merr.) terhadap Inokulasi Fungi Mikoriza Arbuskula (FMA) pada Media Tanam Bekas Tambang dalam Pot Organik

Kegiatan pertambangan menyebabkan degradasi lahan, ditandai dengan penurunan kesuburan tanah dan hilangnya populasi mikroba tanah. Rehabilitasi dapat dilakukan dengan pendekatan biologis, seperti penggunaan fungi mikoriza arbuskula (FMA) dan pot organik. Penelitian ini bertujuan menganalisis pertumbuhan trembesi (S. saman) yang diionokulasi FMA dalam pot organik berbahan kardus, pupuk kandang, cocopeat, dan sumber fosfat alam (rock phosphate dan guano) pada media tanam bekas tambang pasir silika. Penelitian menggunakan rancangan petak terbagi dengan faktor utama inokulasi FMA (M0, M1) dan sub-faktor komposisi pot organik (K1, K2, K3). Hasil penelitian menunjukkan bahwa inokulasi FMA dan pot organik berpengaruh nyata terhadap pertambahan diameteter dan tinggi, berat kering, dan laju fotosintesis. Interaksi antara FMA dan pot organik berpengaruh signifikan terhadap laju fotosintesis dan kolonisasi FMA. Kombinasi pemberian FMA dan pot organik dengan komposisi limbah kardus 15%, pupuk kandang 70%, cocopeat 15%, dan guano 10% memberikan pengaruh yang lebih baik terhadap pertumbuhan Samanea saman

Managerial Practices in The Circular Business Model: Case Study of Indonesian Food Industries

Background: The circular economy is an emerging paradigm designed to address sustainable economic development challenges in Indonesia. At the micro-level, it emphasizes managerial practices in adopting and implementing circular business models.Purpose: This study uses a case study approach to analyze three Indonesian food companies that have incorporated circular economy principles into their operations.Design/methodology/approach: A qualitative approach is utilized, employing semi-structured interview methods to gather in-depth and detailed information. Results: The research identifies managerial practices through a taxonomic framework of circular business model dimensions, focusing on value creation and capture. Managerial practices vary across the three companies based on the nature of their products and waste management processes.Conclusion: The findings underscore the need to strengthen the ecosystem through collaborative efforts among the industrial sector, government, and other institutions.Originality/value (State of Art): This is the first multicase study in Indonesia to explore managerial practices in circular business models at the micro level, specifically within the food industry. Keywords: circular economy, business model, managerial practices, food industry, external facto