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All Journal Hydrogen: Jurnal Kependidikan Kimia EXCELLENT HEALTH JOURNAL Life Science
Sari, Lala
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Agriculture, Biological Sciences & Forestry Chemistry Education Health Professions Nursing Public Health

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Hubungan Tingkat Stres Dengan Siklus Menstruasi Pada Mahasiswi S1 Keperawatan Stikes Hang Tuah Tanjungpinang Sari, Lala; Putri, Mawar Eka; Kurniati, Safra Ria
Excellent Health Journal Vol. 1 No. 2 (2023): Juni 2023
Publisher : LPPI Yayasan Almahmudi Bin Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70437/excellent.v1i2.18

Abstract

Siklus menstruasi idealnya teratur setiap bulan dengan rentang waktu 21-35 hari setiap hari dengan lama waktu menstruasi 3-7 hari setiap kali periode menstruasi. Siklus menstruasi sendiri banyak dipengaruhi oleh berbagai faktor, salah satunya adalah tingkat stres. Penelitian ini bertujuan untuk mengetahui hubungan antara tingkat stres dengan siklus menstruasi pada mahasiswi S1 Keperawatan. Desain penelitian yang digunakan pada penelitian ini adalah kuantitatif dengan studi korelasi analitik dan menggunakan pendekatan cross-sectional. Pengambilan sampel dilakukan menggunakan teknik purposive sampling dengan jumlah responden sebanyak 44 mahasiswi S1 Keperawatan Stikes Hang Tuah Tanjungpinang. Penelitian menggunakan alat ukur Kuesioner Perceived Stres Scale dan Kuesioner siklus mentruasi. Hasil penelitian ditemukan usia menarche terbanyak adalah 11-13 tahun (75,0%). 11 (25,0%) responden mengalami stres ringan, 19 (43,2%) stres sedang, 14 (31,8%) stres berat. Responden yang mengalami siklus menstruasi normal sebanyak 24 (54,5%) dan responden yang mengalami siklus menstruasi tidak normal sebanyak 20 (45,5%). Hasil dari uji statistic dengan menggunakan uji chi-square didapatkan nilai p value sebesar 0,010 ≤ α (0,05). Ada hubungan tingkat stres dengan siklus menstruasi pada mahasiswi S1 Keperawatan Stikes Hang Tuah Tanjungpinang. Disarankan kepada mahasiswi agar mampu beradaptasi terhadap stressor dengan cara mensubstitusikan menjadi sebuah tantangan yang positif sehingga mahasiswa bisa tetap produktif tanpa harus terpuruk dengan stres yang dialami.
Analysis of Students’ Learning Difficulties in Science on the Topic of Additive Substances at Junior High School Sari, Lala; Enawaty, Eny; Sahputra, Rachmat
Hydrogen: Jurnal Kependidikan Kimia Vol. 13 No. 4 (2025): August 2025
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v13i4.17120

Abstract

This study aims to describe students’ learning difficulties in science subjects on the topic of additive substances at SMP Swasta Sivaliputta Kubu Raya and to identify the factors contributing to these difficulties. The research employed a descriptive quantitative method, with data collected through questionnaires, unstructured interviews, observations, and documentation. The study involved 36 eighth-grade students as participants. The findings indicate that learning difficulties are influenced by internal factors, particularly study habits (49%), which fall into the category of “moderately experiencing difficulties.”This study recommends the implementation of interactive and contextual learning strategies, as well as the reinforcement of independent study habits, to improve students” understanding of science subjects, particularly the topic of additive substances.
Kepadatan Bakteri Biofertilizer Cair Air Kelapa Menggunakan Bakteri Pelarut Fosfat (Bacillus spp.) Asal Tanah Gambut Kalimantan Barat: Density of Liquid Biofertilizer Coconut Water Bacteria Using Phosphate Solubilizing Bacteria (Bacillus spp.) from West Kalimantan Peat Soil Sari, Lala; Rahmawati; Khotimah, Siti; Mukarlina
Life Science Vol. 14 No. 1 (2025): May 2025
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/unnesjlifesci.v14.i1.1673

Abstract

Biofertilizer is an environmentally friendly fertilizer, has a long release time so it can be absorbed by plants long enough, and has enzymatic activities such as binding nitrogen and dissolving phosphate. Phosphate solubilizing bacteria (BPF) can dissolve phosphate that was previously unavailable to become available. This research aims to further examine the potential of BPF isolates from Kalimantan as a liquid biofertilizer agent using coconut water as a medium. The research was conducted for 3 months, from June to August 2023 at the Microbiology Laboratory, Biology Department, Faculty of Mathematics and Natural Science Tanjungpura University, Pontianak. This research used a Completely Randomized Design (CRD) with 8 treatments and 3 replications using the Total Plate Count method. The results of the study showed that the highest treatment is a treatment of A4 on day 6 with an average density of 9,4x108 CFU/mL. The BPF which has the highest potential as a biofertilizer is found in treatment A4, the combination bacterial isolates of Bacillus sp1 and Bacillus sp2, supported by the high population treatment of A4 during each storage. Liquid biofertilizers have many advantages compared to solid biofertilizers, including having a higher number of microbial cells, longer shelf life, greater protection against the environment and better effectiveness in the field. This study can provide information on the density of liquid biofertilizer bacteria using environmentally friendly coconut water media for the community by using phosphate-solubilizing bacteria (Bacillus spp.) from West Kalimantan peat soil.
Co-Authors Ari Hepi Yanti Eny Enawaty Putri, Mawar Eka Rachmat Sahputra Rahmawati Safra Ria Kurniati Siti Khotimah