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All Journal International Journal of Evaluation and Research in Education (IJERE) HAYATI Journal of Biosciences Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Jurnal Ilmu Pertanian Indonesia Jurnal Akuakultur Indonesia Journal of Tropical Life Science : International Journal of Theoretical, Experimental, and Applied Life Sciences BIOTROPIA - The Southeast Asian Journal of Tropical Biology Journal of Tropical Soils Biota: Jurnal Ilmiah Ilmu-Ilmu Hayati J-Simbol: Jurnal Magister Pendidikan Bahasa dan Sastra Indonesia Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan (Journal of Natural Resources and Environmental Management) Jurnal Sumberdaya Hayati BERITA BIOLOGI Jurnal Biodjati BIOEDUSCIENCE Majalah Ilmiah Biologi BIOSFERA: A Scientific Journal Menara Perkebunan Jurnal Syntax Imperatif : Jurnal Ilmu Sosial dan Pendidikan Lugawiyyat Caraka : Indonesia Journal of Communication MADURANCH: JURNAL ILMU PETERNAKAN Jurnal Ilmiah Sains Jurnal Ventilator: Jurnal Riset Ilmu Kesehatan dan Keperawatan Vitamin: Jurnal Ilmu Kesehatan Umum Retorika: Jurnal Komunikasi, Sosial dan Ilmu Politik
Hamim Hamim
Department Of Biology, Faculty Of Mathematics And Natural Sciences, IPB University, Kampus IPB Darmaga, 16680 Bogor, Indonesia
Religion Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemistry Computer Science & IT Earth & Planetary Sciences Economics, Econometrics & Finance Education Environmental Science Health Professions Immunology & microbiology Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Mathematics Nursing Physics Public Health Social Sciences Veterinary

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Pengaruh Exposure Google Review dan Service Excellent Terhadap Kepuasaan Pengguna Jasa Di Kamar Kost Quro Surabaya Qurrota A`yun, Hajar; Sadono , Teguh Priyo; Hamim, Hamim
Retorika: Jurnal Komunikasi, Sosial dan Ilmu Politik Vol. 1 No. 7 (2024): Retorika: Jurnal Komunikasi, Sosial dan Ilmu Politik
Publisher : Retorika: Jurnal Komunikasi, Sosial dan Ilmu Politik

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Perkembangan persaingan di era digitalisasi pada industri penginapam di Indonesia yang kian sengit, hal demikian mendorong pemilik usaha dalam memberi sebuah layanan yang baik supaya pelanggan merasakan kepuasan serta tidak menyebabkan keluhan serta memberikan ulasan baik pada google review. Penelitian ini ditujukan guna memahami pengaruh google review serta pelayanan prima (service excellent) atas kepuasan pelanggan pada kamar kost quro di surabaya. Pendekatan yang dipakai pada penelitian ini yakni pendekatan kuantitatif. Populasi penelitian ini sejumlah pengguna yang mana total sampelnya yakni 34 responden. Teknik pengambilan sampel memakai Purposive Sampling melalui syarat yakni pelanggan aktif pengguna jasa kamar kost quro dan status pelanggan: mahasiswa, pekerja, dan magang. Analisis yang dipakai yakni uji reabilitas, uji validitas, uji asumsi klasik, analisis regresi berganda, analisis deskriptif, uji t, uji F, serta koefisien determinasi. Hasil penelitian memerllihatkan bahwasanya (1) google review serta pelayanan prima punya pengaruh simultan terhadap kepuasan pelanggan yang bernilai F hitung senilai 29,984 serta nilai signifikan senilai 0,000;(2) google review punya pengaruh signifikan terhadap kepuasan pelanggan bernilai t hitung senilai 5,240 serta nilai signifikan senilai 0,000;(3) Pelayanan prima punya pengaruh signifikan terhadap kepuasan pelanggan bernilai t hitung senilai 5,240 serta nilai signifikan senilai 0,000. Hasil analisis koefisien determinan diperlihatkan bahwasanya pengaruh variabel googgle review dengan pelayanan prima terhadap kepuasan senilai 61,7%.
Pengaruh Komunikasi Digital, Kepuasan Mahasiswa, Inovasi, Kolaborasi Digital Terhadap Reputasi Organisasi di Universitas Mbojo Bima Anhikmah, Anhikmah; Priyo Sadono , Teguh; Hamim, Hamim
JURNAL SYNTAX IMPERATIF : Jurnal Ilmu Sosial dan Pendidikan Vol. 5 No. 6 (2025): Jurnal Syntax Imperatif: Jurnal Ilmu Sosial dan Pendidikan
Publisher : CV RIFAINSTITUT

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36418/syntaximperatif.v5i6.586

Abstract

This study aims to analyze the influence of digital communication, student satisfaction, innovation, and digital collaboration on organizational reputation at Mbojo University of Bima. Using an explanatory quantitative approach, this research involved 251 respondents selected through purposive sampling techniques. Data were collected using a questionnaire that has been tested for validity and reliability. The results of the regression analysis indicate that all independent variables have a positive and significant effect on organizational reputation. Among these variables, student satisfaction has the greatest impact, followed by digital collaboration, innovation, and digital communication. This study underscores the importance of effective and responsive communication, as well as innovation in teaching methods, to enhance the university's reputation. The findings provide insights for university management in designing strategies that can strengthen organizational reputation in the eyes of students and other stakeholders. Practical and academic recommendations are also presented to support further development in this field of research.
Drought Tolerance in Transgenic Potato Cultivar IPB CP1 Expressing MmCuZn-SOD Gene Musawira; Tjahjoleksono, Aris; Hamim, Hamim; Miftahudin, M.
HAYATI Journal of Biosciences Vol. 32 No. 5 (2025): September 2025
Publisher : Bogor Agricultural University, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.4308/hjb.32.5.1377-1386

Abstract

Drought stress induces reactive oxygen species (ROS) accumulation, which is harmful to plant cells. Consequently, it inhibits plant growth and decreases yield. The enzyme superoxide dismutase (SOD), which is encoded by the SOD gene, is the first defence enzyme in the cells that detoxify ROS. The study aimed to analyze the tolerance of transgenic potato cultivar IPB CP1 and its yield under drought-stress conditions. The results showed that transgenic plants had superior morphological characteristics, such as plant height, number of leaves, stem diameter, and plant biomass, than non-transgenic plants. However, photosynthetic rate, chlorophyll content, stomatal conductance, and transpiration rate showed similar levels between the transgenic and non-transgenic plants. The transgenic plants expressing the MmCu/Zn-SOD gene showed lower lipid peroxidation levels than the non-transgenic plants, indicating that the gene works well to reduce the cell's ROS level. Transgenic plant clone CP1S6 showed 13 times higher gene expression and tuber yield than non-transgenic plants. These research indicated that the transgenic plants expressing the MmCu/Zn-SOD gene are more tolerant to drought stress than the non-transgenic plants.
Pola dan Intensitas Pigmentasi Serta Fotosintesis pada Tanaman Hias Daun Caladium pada Tingkat Naungan Berbeda: Pigmentation Pattern and Intensity and Photosynthesis of Ornamental Caladium at Different Shading Levels Yanuar, Ai Ika Ayu; Hamim, Hamim; Laelasari; Ratnadewi, Yuliana Maria Diah
Jurnal Sumberdaya Hayati Vol. 11 No. 2 (2025): 2025
Publisher : Departemen Biologi, Institut Pertanian Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jsdh.11.2.74-82

Abstract

Caladium, a member of the Araceae family, is known for its diverse leaf colors and patterns, referred to as variegation. This study aimed to examine the relationship between pigmentation patterns, variegated areas, and leaf anatomy, chlorophyll content, and photosynthetic rate under different light conditions. Two light treatments were applied, full sun (0% shade, 37,500 lux) and 70% shade (12,000 lux), using direct morning sunlight. Seven distinct types of Caladium were used in the experiment. Photosynthetic rate was measured using a LI-6400 portable photosynthesis system at Photosynthetic Photon Flux Densities (PPFD) of 100, 400, and 800 µmol m-2 s-1. Pigment analysis included quantification of chlorophyll, carotenoids, and anthocyanins, while morphological assessments focused on leaf size, variegated area, and leaf thickness. Plants exposed to higher light intensity developed smaller, thicker leaves with mostly larger proportion of variegated area. Chlorophyll, carotenoid, and anthocyanin contents varied depending on plant type and light treatment. The net photosynthetic rate (Pn) increased with higher PPFD and was greater in unshaded conditions. Among the plant types, V3 and V4 exhibited characteristics typical of shade-adapted species, while V6 showed traits of sun-loving plants. Overall, the study demonstrated that variegated Caladium plants maintain comparable net photosynthetic rates despite differences in pigmentation patterns and variegation intensity.
The expression of OsPLA2-III and OsPPO genes in rice (Oryza sativa L.) under Fe toxicity stress Turhadi, .; Hamim, .; Ghulamahdi, Munif; Miftahudin, .
Journal of Tropical Life Science Vol. 11 No. 2 (2021)
Publisher : Journal of Tropical Life Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11594/jtls.11.02.10

Abstract

Lipid is an important biomolecule in plant because of their structural and functional roles in plant cells. Moreover, lipid could be a signal molecule in defense system of plants under biotic and abiotic stresses. Detoxification process of toxic substances, which is one of the defense system and controlled by various genes, plays an important role in tolerance mechanism in plant under stress conditions, including iron (Fe) toxicity. Plants develop various tolerance strategies to cope the Fe toxicity. The objective of this research was to investigate the expression of OsPLA2-III and OsPPO genes under Fe stress condition. Two-weeks-old seedlings of two rice varieties, i.e., IR64 (Fe-sensitive toxicity) and Pokkali (Fe-tolerant toxicity) were used. Both varieties were treated with 1 (control) and 400 ppm of Fe in the form of FeSO4.7H2O in the nutrient culture solution. The leaf bronzing, chlorophyll content, and relative expression of OsPLA2-III and OsPPO genes were observed. An in-silico study was also performed to predict the interaction between OsPLA2-III and OsPPO proteins. The results showed that the Fe toxicity induced leaf bronzing, reduced leaf chlorophyll content, and increased the OsPLA2-III and OsPPO gene expression levels. Both genes are suggested to have a role in plant tolerance mechanism during Fe toxicity stress via lipid signaling pathway.
Application of silica solubilizing bacteria increases water efficiency in maize Indah Puspita SARI; Yulin LESTARI; HAMIM HAMIM; Laksmita Prima SANTI
Menara Perkebunan Vol. 90 No. 1 (2022): 90 (1), 2022
Publisher : INDONESIAN OIL PALM RESEARCH INSTITUTE

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22302/iribb.jur.mp.v90i1.493

Abstract

Abstract Global climate change will result in decreased rainfall and increased evaporation. Thus, it is estimated that the frequency and severity of drought stress will get worse. Silica increases plant drought resistance by improving water use efficiency in plants. Despite its abundant availability in soil, most silica sources are not available to plants due to their low solubility. Silica solubilizing bacteria (SSB) have an important role in increasing the available silica. This study aims to observe the silica solubilizing activity of three SSB isolates collections of PPBBI on insoluble silica sources, including magnesium trisilicate, quartz, and feldspar, and see their effects on increasing water use efficiency in corn plants via drought experiments. SSB activity was measured using the modified standard method of 4500-SiO2 D Heteropoly blue. Drought control in the greenhouse follows the Snow and Tingey system. The experimental design used a completely randomized design factorial with irrigation conditions and SSB species as variables. Water use efficiency is measured in real-time with a sap flow meter. The results showed that SSB Pseudomonas fluorescens-B41 had the highest silica dissolving activity 81.93 ppm on Mg-trisilicate. The application of SSB can reduce maize transpiration rate and increase water use efficiency up to 84% under moderate drought stress and 46% under normal irrigation, but in severe drought stress, where the nutrient solution was maintained at 25 cm from plant root, water use efficiency was not significant. This is suspected due to the extreme drought conditions in the potting soil so that the applied SSB cannot maintain its activities.[Keywords: aquaporin, drought stress, Snow and Tingey system, SSB, quartz]AbstrakPerubahan iklim global mengakibatkan penurunan curah hujan dan peningkatan evaporasi, sehingga diperkirakan frekuensi dan tingkat keparahan cekaman kekeringan akan semakin tinggi. Silika (Si) diketahui dapat meningkatkan ketahanan tanaman terhadap kekeringan dengan cara memperbaiki efisiensi penggunaan air pada tanaman. Meskipun ketersediaanya berlimpah di tanah, sebagian besar Si dalam bentuk yang tidak tersedia bagi tanaman, karena sifat kelarutannya yang rendah. Untuk meningkatkan silika tersedia bagi tanaman, bakteri pelarut silika (BPS) memiliki peranan yang penting. Penelitian ini bertujuan menguji aktivitas pelarutan silika dari tiga koleksi isolat BPS Pusat Penelitian Bioteknologi dan Bioindustri Indonesia (PPBBI) pada sumber silika tidak larut berupa magnesium trisilikat, kuarsa, dan feldspar, serta melihat pengaruh aplikasi BPS terhadap efisiensi penggunaan air pada tanaman jagung yang diberi perlakuan cekaman kekeringan. Aktivitas pelarutan silika diukur menggunakan modifikasi metode standar 4500-SiO2 D Heteropoly blue. Pengendalian kekeringan di rumah kaca mengadaptasi sistem Snow dan Tingey. Rancangan percobaan menggunakan rancangan acak lengkap faktorial dengan kondisi kekeringan dan jenis bakteri BPS sebagai peubah bebas. Efisiensi penggunaan air diukur secara real time dengan sap flow meter. Hasil penelitian menunjukkan bahwa BPS dengan kode Pseudomonas fluorescens-B.41 memiliki aktivitas pelarutan silika tertinggi pada susbtrat Mg-trisilika yaitu 81,93 ppm. Aplikasi BPS menurunkan laju transpirasi jagung dan meningkatkan efisiensi penggunaan air hingga 84% pada cekaman kekeringan sedang dan 46% pada irigasi normal, namun pada cekaman kekeringan parah, dimana larutan hara dipertahankan pada jarak 25 cm dari sistem perakaran efisiensi penggunaan air tidak signifikan. Diduga hal ini disebabkan kondisi kekeringan pada media tanam terlalu ekstrim sehingga BPS yang diaplikasi tidak dapat mempertahankan aktivitasnya.[Kata kunci: aquaporin, cekaman kekeringan, sistem Snow dan Tingey, BPS, kuarsa]
إعداد المادة التعليمية لمهارة الكلام من الحوار القرآني في سورة الكهف نموذجا Hamim, Hamim
Lugawiyyat Vol 3, No 1 (2021): Lugawiyyat
Publisher : UIN Maulana Malik Ibrahim Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18860/lg.v3i1.12319

Abstract

The background of the research comes from learners’ difficulties in developing their language competencies especially speaking skill. Therefore, Arabic learning for foreign learner needs a good quality of speaking skill. It is really necessary to develop their speaking skill through good expressions and grammar in speaking especially for advanced learner.In this case, the researcher found that learners of Arabic speaking skill are still poor and uncreative because learners still do not notice the art of Arabic speaking. Through this underlying reason, the researcher composes sample of Arabic learning material for speaking skill inspired from dialogue within Al Quran in Surah Al Kahfi. Hence, it leads to the question about the appropriate example in Surah Al Kahfi which is suitable for learning Arabic speaking skill.This research uses descriptive analysis method consisting of: 1) Data Resource, 2) Data Collection, 3) Data Analysis, 4) Composing Learning Material.The result of this research shows that: 1) the dialogue within Al Quran in Surah Al Kahfi consists of three kinds of dialogue with various forms and models; 2) the dialogue within Al Quran in Surah Al Kahfi has special features which are able to be inspiration as learning model to sharpen Arabic speaking skill; 3) the dialogue within Al Quran in Surah Al Kahfi can be a guidance in composing learning material especially for speaking with artistic Arabic expressions.
The effectiveness of calcium silicate in preventing ice-ice disease and production performance of Kappaphycus alvarezii Wirantari, Ayu Puspa; Nirmala, Kukuh; Supriyono, Eddy; Hamim, Hamim
Jurnal Akuakultur Indonesia Vol. 24 No. 2 (2025): Jurnal Akuakultur Indonesia
Publisher : Indonesian Society of Scientific Aquaculture (ISSA)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19027/jai.24.2.288-298

Abstract

The cultivation of Kappaphycus alvarezii faces serious challenges due to ice-ice disease outbreaks. This disease is caused by fluctuating environmental conditions that induce stress in the seaweed. Ice-ice disease is characterized by thallus whitening, softening, and fragility, which can lead to a reduction in yield and directly impact the economic returns for seaweed farmers. This study aims to evaluate the effectiveness of calcium silicate (CaSiO3) dosing as a mineral source for the prevention of ice-ice disease and the growth of K. alvarezii seaweed. The experimental design used was a completely randomized design with three replications across four treatments: CaSiO3 doses of 0, 1.6, 1.8, and 2 g/L. The study used an initial weight of K. alvarezii of 100 g per tie. The experiment was conducted through a field trial in seawater using an off-bottom cultivation method. The results indicated that the group with the highest dose of CaSiO3 (2 g/L) produced the best ice-ice resistance, with treatment D showing 17.77 ± 5.09% at the population level and 0.25 ± 0.015 at the individual level, which was statistically significant (P<0.05). Optimal CaSiO3 dosing can be a potential cultivation strategy to improve resistance to ice-ice disease and increase the productivity of K. alvarezii. Keywords: ice-ice, Kappaphycus alvarezii, mineral, nutrient enrichment, seaweed ABSTRAK Budidaya rumput laut K. alvarezii menghadapi tantangan serius akibat serangan penyakit ice-ice. Penyakit ini disebabkan karena kondisi lingkungan yang berfluktuatif sehingga menyebabkan rumput laut menjadi stres. Penyakit ice-ice ditandai dengan pemutihan talus, talus menjadi lunak, dan mudah patah. Penyakit ini dapat mengurangi hasil panen yang berdampak langsung pada keuntungan ekonomi bagi pembudidaya rumput laut. Penelitian ini bertujuan untuk mengevaluasi efektivitas pemberian dosis kalsium silikat (CaSiO3) sebagai sumber mineral terhadap pencegahan penyakit ice-ice dan pertumbuhan rumput laut K. alvarezii. Rancangan percobaan yang digunakan adalah rancangan acak lengkap dengan tiga kali ulangan pada empat perlakuan yaitu dosis CaSiO3 0, 1,6, 1,8, dan 2 g/L. Penelitian ini menggunakan berat awal K. alvarezii sebesar 100 g per ikatan. Pengujian dilakukan dengan percobaan lapangan di perairan laut dengan metode lepas dasar. Hasil penelitian menunjukkan bahwa kelompok dengan dosis CaSiO3 tertinggi (2 g/L) secara signifikan (p<0,05) menghasilkan persentase ice-ice terbaik yaitu pada perlakuan D sebesar 17,77 ± 5,09% pada level populasi dan sebesar 0,25 ± 0,01% pada level individu. Pemberian CaSiO3 pada dosis optimal dapat menjadi strategi budidaya yang potensial untuk meningkatkan ketahanan dari penyakit ice-ice dan produktivitas K. alvarezii. Kata kunci: ice-ice, Kappaphycus alvarezii, mineral, pengayaan nutrisi, rumput laut
Pemanfaatan Bakteri Selulolitik dan Xilanolitik yang Potensial untuk Dekomposisi Jerami Padi Nur, Hasrul Satria; Meryandini, Anja; Hamim, .
JOURNAL OF TROPICAL SOILS Vol. 14 No. 1: January 2009
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2009.v14i1.71-80

Abstract

There were 3 prospective isolates of cellulolytic bacteria resulted from the total of 31 isolates we found, i.e. C4-4, C5-1, and C11-1.  Four combinations of bacteria including C4-4 + Xilanolytic (A), C5-1 + Xilanolytic (B), C11-1 + Xilanolytic (C), 45I-3 + 234P-16 (D), and control (E, without bacteria) were applied as inoculant of rice straw decomposition.  In the incubation period the pH-H2O value of C4-4 + Xilanolytic (A) and C5-1 + Xilanolytic (B) was relatively stable.  The C/N ratio of all treatments decreased after 3 weeks of incubation.  The C/N ratio value of A, B, C, D and E treatments were 22.48, 23.43, 27.49, 26.82, and 29.53 respectively.  Decomposition rate all of combination treatments were faster than the control.  The content of macro-micro nutrient of A, B, C, and D treatments increased in the end of measurement, while the control didn’t.  The physical characteristic of substrate after incubation was better in A and B treatments that others.  The result indicated that the combination of C4-4 + Xilanolytic (A) and C5-1 + Xilanolytic (B) bacteria were the best combination for decomposition of rice straw. 
Co-Authors , Triadiati Abdul Aziz Ahmad Barizi Alex Hartana Alex Hartana ALEX HARTANA Anhikmah, Anhikmah Anja Meryandini Aris Tjahjoleksono Aris Tri Wahyudi BEKTI KURNIAWATI Cholili, Abd Hamid Deden Saprudin Devi Media Siska Dian Hendrayanti Didy Sopandie DWI ANDREAS SANTOSA Eddy Supriyono Faidah Faidah Fendiyanto, Miftahul Huda Hadisunarso Hadisunarso Hirmas Fuady Putra HIRMAS FUADY PUTRA, HIRMAS FUADY Iman Rusmana Indah Puspita SARI khayati, Eliya Nur Kukuh Nirmala Laelasari Laksmita Prima SANTI Luluk Setyaningsih Lutfiani Lutfiani Ma’arif, A. Samsul Ma’arif Miftahuddin Miftahudin , Miftahudin Miftahudin . Miftahudin, M. MISHBAHUDDIN, MOHAMAD Muhammad Jusuf Munif Ghulamahdi Musawira Nampiah Sukarno Nani Heryani Naufal, Ahmad Himi NISA RACHMANIA MUBARIK Novalita Novalita Nugroho, Robertus Nur, Hasrul Satria Nurul Hidayati Palupi, Merry Fridha Tri Prihadi, Kususanto Ditto Priyo Sadono , Teguh Putri Nur Azizah Hutagalung Qurrota A`yun, Hajar Rani Apriyani Raharja Ratnadewi, Yuliana Maria Diah Rizka Rizka Robertus Nugroho Rosyidah, Risvi Uly Sadono , Teguh Priyo Sigit Tri Wibowo Sindiya, Vita Sri Wilarso Budi Suharsono Suharsono Sukmarayu P Gedoan Sukmarayu P. Gedoan Sulistyaningsih, Yohana C Syaiful Mustofa Syuhadak, Syuhadak Tri Muji Ermayanti Tri Muji Ermayanti Turhadi Turhadi UTUT WIDYASTUTI Utut Widyastuti UTUT WIDYASTUTI Wirantari, Ayu Puspa Yadi Setiadi Yanuar, Ai Ika Ayu Yohana Caecilia Sulistyaningsih Yuli Siti Fatma YULIN LESTARI