bluuebunny/crossref_metadata_2025_split huggingface dataset:
Hasil Kandungan Agar Ekstraksi Non-Alkali Gracilaria sp. yang Tumbuh di Lingkungan Berbeda
Authors: Andiska Prismabella Wilis , Susanto AB , Pramesti Rini 
Published: July 2021

ABSTRAK: Gracilaria sp. merupakan rumput laut merah penghasil agar yang banyak digunakan untuk industri pangan maupun non pangan lainnya. Ekstraksi ini umumnya menggunakan alkali yang berdampak pada lingkungan dan keamanan bahan pangan. Informasi tentang ekstraksi perlakuan non alkali di Indonesia untuk industri pangan diduga belum ada sehingga penelitian ini perlu dilakukan. Tujuan penelitian ini untuk mengkaji apakah ekstraksi non alkali dari Gracilaria sp. dapat menghasilkan agar, rendemen, kandungan proksimat serta dianalisis FTIR dari kedua lokasi yang berbeda (laut dan tambak). Metode ekstraksi dilakukan dengan merebus sampel kering hingga didapatkan agar, yang selanjutnya dikeringkan dan dijadikan tepung. Hasil penelitian menunjukkan ekstraksi perlakuan non alkali dari kedua lokasi dapat menghasilkan rendemen dengan nilai rendah (14-15,31%). Kadar air tertinggi (15,40±0,59%) terdapat pada agar sampel dari laut, kadar abu tertinggi (41,45±0,59%) pada sampel kering dari laut, kadar protein tertinggi (8,59±0,26%) pada sampel kering dari tambak, kadar lemak tertinggi (0,63±0,13%) pada agar sampel dari laut, dan karbohidrat tertinggi (67,19±0,86%) pada sampel kering dari tambak. Hasil FTIR menunjukkan agar mengandung komposisi gugus galaktosa 3,6-anhydro-L-galaktosa. ABSTRACT: Gracilaria sp. is a red seaweed which is known as an agarophyte and widely used for food and other non-food industries. Generally agar extraction uses alkali which has an environmentally impact and food safety. Non-alkaline extraction treatment for food grade is still under observed in Indonesia. The purpose of this research is to access whether agar extraction of Gracilaria sp. can be carried out, as well as the amount of agar yield, proximate contents and FTIR analysis from two different locations. The extraction method is done by boiling a dry sample to obtain agar, which is then dried and turned into flour. The results showed that the extraction of non-alkaline treatment could be carried out on Gracilaria sp. with low yield (14-15.31%). The highest water content (15.40±0.59%) found in agar from dried seaweed form the sea, highest ash (41.45±0.91%) in dried seaweed from the sea, highest protein (8.59±0.26%) in dried cultured seaweed, highest fat (0.63±0.13%) in agar from the sea, and highest carbohydrate (67.19±0.86%) in dried cultured seaweed. FTIR analysis showed that the agars contained a composition of galactose groups of 3,6-anhydro-L-galaktose.
Analisis Kualitas Alginat Rumput Laut (Padina sp.) Menggunakan Metode Ekstraksi Jalur Kalsium
Authors: Pasaribu Adam Sojuangon , Sedjati Sri , Pramesti Rini 
Published: July 2021

ABSTRAK: Padina sp. merupakan spesies rumput laut cokelat (Phaeophyta) penghasil alginat, namun kualitas alginat yang dihasilkan tergolong rendah dibandingkan alginofit lainnya. Metode ekstraksi jalur kalsium diduga dapat meningkatkan kualitas alginat sehingga penelitian ini perlu dilakukan. Tujuan penelitian ini untuk mengkaji apakah ekstraksi jalur kalsium dapat meningkatkan mutu alginat yang dihasilkan dari rumput laut Padina. Ekstraksi dilakukan dengan metode jalur kalsium konvensional dan jalur kalsium MAE (Microvawe Assisted Extraction). Metode penelitian yang digunakan adalah eksperimental laboratoris dengan 1 perlakuan (kosentrasi CaCl2) dan 3 taraf konsentrasi yaitu 0,5 M 1,0 M dan 1,5 M. Parameter kualitas yang dianalisis meliputi rendemen, kadar air, Kadar abu, viskositas, pH dan FTIR. Hasil uji two way ANOVA menunjukan terdapat signifikansi rendemen dengan nilai 0,007. Metode jalur kalsium MAE dengan konsentrasi 1,0 M CaCl2 menghasilkan kualitas terbaik dengan nilai rendemen (26,83%), kadar air (10,67%), kadar abu (21,83%), viskositas (11,42 cPs) dan pH (6,77). Hasil analisis FTIR menunjukan ke-2 metode ekstraksi menghasilkan natrium alginat dengan adanya sidik jari guluronat dan manuronat pada bilangan gelombang 930-890 cm-1 dan 870-820 cm-1. ABSTRACT: Padina sp. is a species of brown seaweed (Phaephyta) producing alginates, but the quality of alginates produced is relatively low compared to other alginophytes. The calcium pathway extraction method is thought to improve the quality of alginates thus the reason of the research. This research aims to examine whether the calcium pathway extraction improves the quality of alginates produced from Padina. Seaweed extraction was carried out using conventional calcium pathways and MAE (Microwave Assisted Extraction) calcium pathways. The research method used was laboratory experimental with 1 treatment (CaCl2 concentration) and 3 concentration levels : 0.5 M, 1.0 M, 1.5 M. Quality parameters analyzed includes yield, moisture content, ash contetnt, viscosity, pH and FTIR. The two way ANOVA test results showed that there was a significance of yield value of 0.007. The MAE calcium pathway method with a concentration of 1.0 M CaCl2 produces the best quality with a yield value (26.83%), water content (10.67%), ash content (21.83%), viscosity (11.42 cPs) and pH (6.77). FTIR analysis results show that the two extraction methods produces sodium alginate in the presence of guluronate and manuronic fingerprints at wave numbers 930-890 cm-1 and 870-820 cm-1.
Analisis Multivariat Untuk Melihat Hubungan Jenis Sedimen Terhadap Jenis Lamun
Authors: Chamidy Ardian Nurrasyid , Suryono Chrisna Adhi , Riniatsih Ita 
Published: July 2021

ABSTRAK: Perairan Teluk Awur dan Pulau Panjang memiliki kondisi perairan yang berbeda dan merupakan perairan yang masih baik untuk pertumbuhan lamun. Ekosistem padang lamun tumbuh pada sedimen dan hidup terendam di dalam air laut. Komposisi jenis sedimen diduga dapat menyebabkan perbedaan komposisi jenis lamun yang didasari oleh pemikiran bahwa perbedaan komposisi ukuran butir sedimen akan menyebabkan perbedaan nutrisi bagi pertumbuhan lamun. Penelitian ini bertujuan untuk mengkaji hubungan jenis sedimen terhadap jenis lamun di perairan Teluk Awur dan Pulau Panjang Jepara dengan menggunakan analisis multivariat. Penelitian ini dilakukan dalam beberapa tahap yang meliputi tahap persiapan, tahap penentuan stasiun dengan metode sampling purposive method, tahap pengambilan data lapangan, tahap analisis tekstur sedimen yang dilakukan di laboratorium teknik sipil fakultas teknik Universitas Diponegoro, dan tahap analisis data menggunakan analasis multivariat yaitu Principal Component Analysis (PCA). Hasil analisis PCA menunjukkan bahwa Cymodocea serrulata dan Cymodocea rotundata berkorelasi positif dengan sand, kecepatan arus, dan pH. Thalassia hemprichii dan Enhalus acoroides memiliki korelasi positif dengan silt, clay, suhu, salinitas dan bahan organik. Gravel memiliki korelasi postif dengan nitrat dan fosfat.ABSTRACT: The waters of Teluk Awur and Panjang Island have different water conditions and are still good waters for seagrass growth. Seagrass ecosystems grow in sediments and live submerged in seawater. The composition of the substrate types is thought to cause differences in the composition of seagrass types based on the thought that differences in the composition of sediment grain size will cause differences in nutrition for seagrass growth. This study aims to examine the relationship of sediment types to seagrass species in Teluk Awur and Pulau Panjang, Jepara by using multivariate analysis. This research was conducted in several stages including the preparation stage, the stage of determining stations with the purposive sampling method, the stage of field data collection, the stage of sediment texture analysis carried out in the civil engineering laboratory of the engineering faculty Diponegoro University, and the stage of data analysis using multivariate analysis with Principal Component Analysis (PCA). PCA analysis results show that Cymodocea serrulata and Cymodocea rotundata are positively correlated with sand, current speed, and pH. Thalassia hemprichii and Enhalus acoroides have a positive correlation with silt, clay, temperature, salinity and organic matter. Gravel has a positive correlation with nitrate and phosphate.
Pengamatan Kesesuaian Lahan Peneluran Penyu Lekang Lepidochelys olivacea, Eschscholtz, 1829 (Reptilia:Cheloniidae) di Pantai Mapak Indah, Nusa Tenggara Barat
Authors: Akbar Mochamad Rizaldi , Luthfi Oktiyas Muzaky , Barmawi M. 
Published: July 2021

ABSTRAK : Pantai Mapak Indah merupakan pantai yang sering menjadi pantai pendaratan biota Penyu, umumnya penyu yang mendarat berjenis penyu Lekang (Lepidochelys olivaceae), pantai yang juga di gunakan untuk aktifitas nelayan dan pariwisata diduga akan mengganggu habitat penyu yang cenderung merusak atau merubahnya. Tujuan dari penelitian ini adalah untuk mengetahui habitat yang sesuai untuk kebutuhan peneluran penyu Lekang (Lepidochelys olivaceae). Metode yang di pakai menggunakan data Primer (Suhu, Kelembaban, Kemiringan, dan Vegetasi) dan skunder berasal dari catatan kelompok pelestari penyu dan instansi terkait. Penelitian ini di laksanakan pada tanggal 24 Juni – 05 Agustus 2019. Hasil dari penelitan ini adalah rentang kemiringan pantai mencapai 10.5%-26% dengan rata-rata 16.3% masih dalam kategori Agak Curam, untuk perbandingan komposisi pasir di sarang Alami dan Semi-Alami 92,94% & 96,34%, vegetasi yang di temukan di sekitar pantai adalah cemara Udang (Casuarina Equisetifolia) dan Pandan Laut (Pandanus sp.), kelapa (Cocos Nucifera) dan Katang-katang (Ipomoea pes-caprae). Suhu saat di lakukan pengamatan selama seminggu memiliki rentang 25°-28° hal ini dapat mempengaruhi jenis kelamin Tukik yang akan menetas serta lama inkubasinya di dalam sarang Semi-Alami ABSTRACT: Mapak Indah Beach is a beach that is often used as a landing site for sea turtles, generally turtles that land on the type of Lekang turtle (Lepidochelys olivaceae), a beach that is also used for fishing and tourism activities is thought to disturb turtle habitats that tend to damage or change it. The purpose of this study was to determine the suitable habitat for the needs of Lekang turtle nesting (Lepidochelys olivaceae). The method used uses Primary data (Temperature, Humidity, Slope, and Vegetation) and secondary data derived from the records of turtle conservation groups and related agencies. This research was carried out on 24 June - 05 August 2019. The results of this research are the range of beach slopes reaching 10.5% -26% with an average of 16.3% still in the category of somewhat steep, for comparison of sand composition in natural and semi-natural nests 92.94% & 96.34%, vegetation found around the coast is pine shrimp (Casuarina Equisetifolia) and Pandan Laut (Pandanus sp.), Coconuts (Cocos Nucifera) and Katang-Katang (Ipomoea pes-caprae). Temperature when observed for a week has a range of 25 ° -28 ° this can affect the sex of the hatchlings that will hatch and the length of incubation in the Semi-Natural nest
Abu Cangkang Kerang Anadara granosa, Linnaeus 1758 (Bivalvia: Arcidae) sebagai Adsorben Logam Berat dalam Air Laut
Authors: Sudarmawan Wisnu Satriyo , Suprijanto Jusup , Riniatsih Ita 
Published: July 2021

Kerang Darah merupakan komoditi ekonomis yang tersebar di seluruh wilayah perairan Indonesia, salah satunya adalah Perairan Demak. Adanya permintaan yang tinggi pada daerah demak dari hasil survey DKP Kabupaten Demak pada tahun 2018 dapat menimbulkan terjadinya limbah cangkang yang cukup banyak. Melalui pendekatan teknologi yang tepat, limbah cangkang kerang tersebut dapat diolah menjadi abu cangkang. Berdasarkan komposisi senyawa kimia abu cangkang mengandung CaO cukup tinggi sehingga abu cangkang berpotensi untuk menjerap logam berat. Materi yang digunakan dalam penelitian adalah abu cangkang hasil olahan dari limbah cangkang sisa produksi kerang darah. Metode eksperimental laboratoris dilakukandalam penelitian yaitu dengan mengontakkan secara langsung logam dan abu cangkang kerang dara (Anadara granosa) dengan pengaruh variasi jenis logam berat dengan analisis spektroskopi serapan atom (SSA). Penyerapan yang optimal terjadi pada logam berat Mangan (Mn) konsentrasi awal 0,103 mg/L menjadi <0,001 dan kontak waktu 24 jam daya serap sebesar 100%. Dapat disimpulkan bahwa pada abu cangkang cukup baik dalam penyerapan logam berat Besi (Fe), Mangan (Mn), Seng (Zn) di air laut perairan Morosari Demak karena dalam proses menghilangkan logam berat dengan struktur CaO disebut pertukaran ion dipengaruhi oleh beberapa faktor jenis adsorben yang digunakan, luas permukaan adsorben, dan konsentrasi zat yang di penjerapan. Blood cockle are economic commodities that are spread throughout the territorial waters of Indonesia, one of which is the Demak waters. The high demand in the Demak area from the results of DKP survey in 2018 can causing a lot of cockle shell waste. Through the right technological approach, the waste is processed into blood cockle shell ash. Based on the chemical composition of shell ash containing CaO in the shell is high enough so the ash has potential to absorb heavy metals. The material used is the blood cockle shell ash that processed from waste shell from the production of blood cockle. The experimental laboratory method was carried out in this research, by directly contacting metal and blood cockle shell ash (Anadara granosa) with the influence of variations in heavy metal types by atomic absorption spectroscopy (AAS) analysis. Optimal absorption occurs in the heavy metal Manganese (Mn) initial concentration of 0.103 mg / L to <0.001 and 24-hour contact time absorption of 100%. It can be concluded that the shell of the product itself has not been efficient in carrying out all the absorption of heavy metals in the sea water samples of Morosari Demak waters because in the process of removing heavy metals with CaO structures is influenced by the type of adsorbent used, the surface area of the adsorbent, and the concentration of in absorption.
Karakteristik Morfometrik Lamun Enhalus acoroides dan Thalassia hemprichii di Pesisir Pulau Bintan
Authors: Sarinawaty Pratiwi , Idris Fadhliyah , Nugraha Aditya Hikmat 
Published: July 2021

ABSTRAK: Lamun merupakan satu-satunya tumbuhan berbiji (angiospermae) yang mampu hidup terendam di dalam air laut dan beradaptasi pada lingkungan dengan salinitas tinggi serta memiliki rhizome, daun dan akar sejati. Kajian terkait karakteristik morfometrik menekankan pada keadaan karakter morfologi suatau spesies yang mendiami suatu wilayah tertentu. Penelitian ini dilakukan dengan tujuan untuk membandingkan karakteristik morfometrik lamun Enhalus acoroides dan Thalassia hemprichii pada ekosistem lamun di beberapa wilayah pesisir di Pulau Bintan. Penentuan lokasi penelitian ditentukan dengan metode purposive sampling sedangkan pengambilan data lamun menggunakan transek kuadran ukuran 50x50cm. Karakteristik bagian lamun yang diukur yaitu panjang daun, lebar daun, diameter rhizome, panjang akar dan jumlah daun. Karakteristik morfometrik lamun di ketiga lokasi memiliki perbedaan. Lamun E. acoroides di lokasi Pantai Impian memiliki panjang daun yang terpanjang dan diameter rhizome yang paling besar dari lokasi lainnya. Sedangkan lokasi pengudang memiliki lebar daun tertinggi. Morfometrik Lamun jenis T. hemprichii yang mempunyai nilai panjang daun, lebar daun dan diameter rhizome tertinggi terdapat di lokasi Pantai Impian. Sedangkan panjang daun terendah terdapat di Pengudang. ABSTRACT: Seagrass is the only seed plant (angiosperms) that can live submerged in seawater and adapt to environments with high salinity and has rhizomes, leaves, and tree roots. Studies related to morphometric characteristics emphasize the morphological character of a species that inhabits a particular area. This research was conducted in October 2019 to March 2020 in Dompak, Pengudang Village, and Pantai Impian to compare the morphometric characteristics of the seagrass Enhalus acoroides and Thalassia hemprichii in seagrass ecosystems in some coastal areas of Bintan Island. The determination of the location of the study was determined by a purposive sampling method while seagrass data collection using a 50x50cm quadrant transect size. Morphometric characteristics of seagrasses in the three locations have differences. Seagrass E. acoroides at the Impian Beach location has the longest leaf length and the largest rhizome diameter than other locations. Whereas the storage location has the highest leaf width. Morphometrics of seagrass T. hemprichii which has the highest value of leaf length, leaf width, and rhizome diameter is at the Dream Beach location. While the lowest leaf length is found in Pengudang.
Hubungan antara Jenis Sedimen Pasir dan Kandungan Bahan Organik di Pantai Kartini, Jepara, Jawa Tengah
Authors: Yudha Gadisza Asmara , Suryono Chrisna Adhi , Santoso Adi 
Published: July 2021

Pantai Kartini merupakan salah satu kawasan wisata di Kabupaten Jepara. Berbagai aktifitas masyarakat serta infrastruktur perairan menjadi kebutuhan yang sangat krusial dengan letak Pantai Kartini. Adanya aktivitas dan bangunan dapat menyebabkan perubahan sebaran ukuran butir dan kandungan bahan organik. Penelitian ini memiliki tujuan untuk mengetahui jenis dan klasifikasi sedimen serta jumlah kandungan bahan organik yang terdapat dalam sedimen di Pantai Kartini, Jepara. Pengambilan data pada penelitian ini yaitu pengambilan data primer yang berupa sampel sedimen dengan menggunakan sediment core. Dilanjutkan dengan analisis sampel sedimen dan analisis kandungan bahan organik. Hasil penelitian menunjukkan bahwa di perairan Pantai Kartini, Jepara memiliki jenis sedimen pasir (sand) dimana nilai ukuran butir tersebut berkisar dari 81-96%, yang mana pada Stasiun 1 rata-rata sebesar 91,6-96%, Stasiun 2 rata-rata sebesar 93,5-96,9%, dan Stasiun 3 rata-rata sebesar 81,4-92,9%. Sedangkan, Kandungan Bahan Organik yang terdapat di perairan tersebut memiliki konsentrasi berkisar dari 5-14% yang termasuk dalam kriteria rendah-sedang, dimana pada Stasiun 1 rata-rata sebesar 10,9-13,3%, Stasiun 2 rata-rata sebesar 5,92-10,18%, dan Stasiun 3 rata-rata sebesar 7,7-14%. Kartini Beach is one of the tourist areas in Jepara Regency. Various community activities and water infrastructure have become crucial needs in Kartini Beach. The existence of activities and buildings can cause changes in the distribution of grain size and content of organic matter. This study aims to determine the type and classification of sediments and the amount of organic matter content contained in sediments in Kartini Beach, Jepara. Data collection in this study is primary data collection in the form of sediment samples using sediment cores. Followed by analysis of sediment samples and analysis of organic matter content. The results showed that in Kartini Coast waters, Jepara had a sand sediment type where the grain size values ranged from 81-96%, which at Station 1 averaged 91,6-96%, Station 2 on average amounted to 93,5-96,9%, and Station 3 averaged 81,4-92,9%. Meanwhile, the content of organic matter contained in these waters has concentrations ranging from 5-14% which are included in the criteria of low-moderate, where at Station 1 an average of 10,9-13,3%, Station 2 an average of 5,92-10,18%, and Station 3 averaging 7,7-14%.
Combining Teaching Strategies, Learning Strategies, and Elements of Super Learning Principles
Authors: Pllana Duli 
Published: July 2021

Blending teaching strategies, learning strategies, and elements of super learning principles increase learning outcomes tremendously in any case, situation, or academic subject. Employing teaching and learning strategies adequately impact on an interactive session (academic subjects or any field) to a great degree, enhance learners’ motivation significantly, improve self confidence and self esteem of learners considerably, and soar learning outcomes substiantly. It is impossible to combine all learning and teaching strategies (there are many techniques, and a small space time to incorporate them in one lesson or an academic subject.) in an academic subject entirely. Accordingly, strategic teaching or learning establishes skills or techniques in addressing a lesson or digesting information from the lesson. Also, learning results depend on the quantity and quality of combining learning and teaching strategies, and components of super learning principles. The greater the participation of mixing techniques or skills in a lesson, the greater are the positive results in the learning outcomes. Teaching and learning strategies, and superlearning elements are in a close relationship with each other; teaching strategies imply learning strategies and elements of super learning. Combination of the three ingredients play a crucial part in any lesson, academic subject, or general knowledge; mixing all these three components together wisely maximizes learning outcomes enormously.
The L2 Motivational Self System and the Instructional Willingness to Communicate in the Kuwaiti EFL Context
Authors: Alenezi Abdullah A. , Al-Saeed Shaima J. , Alazemi Abdullah M. 
Published: July 2021

The study explores the relationship between Dörnyei’s (2005, 2009) L2 motivational self system (L2MSS) and the English as a foreign language (EFL) learners’ instructional willingness to communicate (IWTC). It examines specifically the impact of the three elements of the L2MSS, that is, the ideal self, ought-to self, and learning experience, on the components of the IWTC. The study used a quantitative method of data collection from a two-part questionnaire; both parts were answered by the same participants. The questionnaire was adapted and modified to fit the needs of the Arabic participants, who were 247 Kuwaiti college students. A thorough confirmatory factor analysis was implemented to validate the L2MSS and IWTC questions. The outcomes of the study revealed that each part of the questionnaire was fit to test the data, and thus the tools were authenticated for future research in an Arabic context. In addition to highlighting the significant element of the motivational self, the study looked further into the construct of the IWTC and pinpointed its most important components. The findings show that the ideal self was significantly correlated with the learning responsibility component of the IWTC. The ought-to self was found to be insignificant, and the learning experience had no factor loading and thus was excluded.
School Internal Organisation as a Correlate of Teachers’ Attrition and Retention in Bauchi Metropolis Secondary Schools, Nigerian
Authors: Adamu Martha Maigari , Adam Dr. Muhammad 
Published: July 2021

This paper studied school internal organisation as a correlate of teachers’ attrition and retention in Bauchi metropolis secondary schools. To determine the extent to which compensation and benefits as relates to teachers’ attrition and retention is among the objectives of the study. Correlational research design was adopted. The population of the study consisted of all teachers’ of public secondary schools in Bauchi State. A sample of 50 was selected using table for determining sample size by research Advisor. The simple random sampling technique was employed in selecting the sample. A questionnaire was adapted from modified MetLife Survey of the American Teacher instrument from 2006 and UNESCO (2014), titled “Determinants of Teachers Attrition and Retention (DETAREQ)”. The validity of the instrument was ascertained. A reliability of .71 obtained using Cronbach Alpha. A multiple regression was used to analyzed data obtained. The results showed that Compensation and benefit has positive relationship with Teachers attrition and retention to a large extent. Therefore, Refresher courses /Training, Seminars /workshops should be organized by the Ministry of Education to sensitize and educate teachers to change their mentality and provide them other benefits to attract and keep them in the profession, were recommendations made among others.