bluuebunny/crossref_metadata_2025_split huggingface dataset:
The quality characteristics of frozen salted egg yolk salting using various media
Authors: Fatwa S N , Suhaidi I , Ginting S 
Published: April 2020

Abstract
This research was aimed to find out the quality of frozen salted egg yolk, which was being salting using various media. This research used a completely randomized design (CRD) with 2 factors, i.e. salting media (M): (salt solution; mixture of rice husk ash, salt and water; mixture of red bricks powder, salt and water; mixture of red bricks powder, rice husk ash, salt, water and 5 % of tea) and salting time (L): (15 days; 20 days; 25 days). The results show that the differences in salting media had a very significant different effect on NaCl and general acceptance. The length of salting gave a very significant different effect on protein content, fat content, NaCl and general acceptance. Moreover, the interaction between the differences in salting media and salting time had a, very significant effect NaCl level. It was found that saline solution media with salting time of 25 days produced the best frozen salted egg yolk.
Effects of adding andaliman extract to the shelf life of tempeh nugget product
Authors: Wahyu S E , Lubis Z , Suryanto D 
Published: April 2020

Abstract
Andaliman is typical spice plant in North Sumatra, has benefits as antimicrobial and antioxidant. Tempeh is a protein source food, has short shelf life, so the tempeh processing technology is needed to create another product with longer shelf life and increase its added value. One of them is by processing tempeh into nugget. The purpose of this study was to determine the shelf life of tempeh nugget added with andaliman fruit extract as natural preservative and to determine which concentration was the most optimal in extending the shelf life of tempeh nugget. This study used completely randomized design with two factors. Factor I was the concentration of andaliman extract (0%, 0.1%, 0.25%, 0.5%) and factor II was the storage time (0 day, 7 days, 14 days, 21 days). The parameters analysed were total microbial, water content, and aroma organoleptic test. The results showed that the addition of 0.5% andaliman extract and 21 days storage time obtained the lowest amount of microbes, the lowest water content was obtained at 0% andaliman extract and 21 days storage time treatment, while the highest aroma organoleptic test was obtained at adding 0.5% andaliman extracts. This is due to the presence of antimicrobial in andaliman.
Species morphometric of Anadara Shell in Tanjungbalai aquatic North Sumatera Province, Indonesia
Authors: Desrita  , Susetya I E 
Published: April 2020

Abstract
This research was conducted from October to November 2016 The samples was taken from 3 stations with repeating 3 times in Tanjungbalai Aquatic of North Sumatra Province. Regression equation for relationship length, height, and thickness of Anadara granosa, Anadara gubernaculum dan Anadara inaquivalvis shell to wet weight of flesh i.e Y = 2.950x – 1.3328, Y = 3.246x – 0.8254, Y = 3.01x – 0.5625, Y = 2.143x – 1.0492, Y = 2.2876x – 0.5419, Y = 1.7524 – 0.1926, Y = 2.6734x – 0.9413, Y = 2.6422x – 0.6525, Y = 2.315x – 0.2351. While for correlation coefficient relationship length with wet weight of A. granosa, A. gubernaculum, A. inaquivalvis of 0.796; 0.747; 0.899. Correlation coefficient height with wet weight were found of 0.821; 0.729; 0.909. Correlation coefficient thickness with wet weight of flesh were found of 0.798; 0.754; 0.910.
Characteristics of environment and habitat of sea cucumbers in Pane Island, Tapanuli Tengah Regency
Authors: Susetya I E , Dewinta A F , Harahap Z A , Leidonald R , Yusni E , Suriani M , Lesmana I 
Published: April 2020

Abstract
Pane Island is one of the tourist destinations in Tapanuli Tengah Regency, visually Pane Island has some of marine ecosystems such as seagrass, mangrove, seaweed, and dead coral ecosystems. Sea cucumbers are invertebrates, it’s have high commercial value and has ecological functions. In this study, sea cucumbers identification, abundance and seagrass cover was investigated in Pane Island. The results showed that 1 sea cucumber species were found, Holothuria leucospilota. Sea cucumber abundance ranged from 0 to 1.2 ind/m2. Based on Principal Components Analysis (PCA), sea cucumber abundance is positively related to temperature, current, pH, salinity, total nitrogen, phosphate, and C-organic content. Furthermore, sea cucumber abundance is negatively related to the parameters of water depth, water transparency, DO and percentage of seagrass cover.
Growth of Stingrays (Hemitrigon longicauda) in the waters of Kuala Tanjung, Batubara, Sumatera Utara Province
Authors: Susetya I E , Syahara L , Soemaryono Y , Fadhilah A , Yusni E 
Published: April 2020

Abstract
Stingray (Hemitrigon longicauda) is fish commodity that has high economic value, so it become the first target for fisherman. It can impact negatively the population of stingray. So, we need to make a research about the development of stingray in the Kuala Tanjung waters, Batubara Regency in order to get the information for the basic process of stingray. This research is done in Kuala Tanjung waters, Batubara Regency for two months starting from May to June 2019. The purpose of this study is to determine the Growth Pattern of Stingray in Kuala Tanjung waters, Batubara Regency. The study result concluded that the Stingray Growth Pattern stingray is obtained a value of b = 2.7672 otherwise b <3 had a negative allometric growth pattern.
Maximum sustainable potential and utilization rates of Goldstripe sardinella (Sardinella gibbosa) in Belawan Oceanic Fishing Port
Authors: Dewinta A F , Khairunnisa  , Yusni E , Fadhillah A , Siregar R F , Suriani M 
Published: April 2020

Abstract
Belawan Oceanic Fishing Port is one of the bases of capture fisheries activities in North Sumatera which has considerable fishery potential. The most dominant fish caught in Belawan is Goldstripe sardinella (Sardinella gibbosa). Large-scale fishing activities are considered to be able to reduce the population of S. gibbosa in Belawan, mainly if fishing is carried out at any time. This study aims to analyse the utilization rates and sustainable potential of S. gibbosa at Belawan. This research was conducted by using surplus method production from May to June 2019. The annual catch, effort data, and fishing gear of S. gibbosa were analysed to estimate the Maximum Sustainable Yield (MSY). The main fisheries operating in catching S. gibbosa include trawl, fishing line, and gillnet. The Maximum Sustainable Yield (MSY) based on the Schaefer model obtained a value of 1821.92 and 1030.87 for on the fox model; the optimum effort based on the Schaefer model obtained a value 22.76 and 23.24 on the fox model. Based on these results, we concluded that the production of S. gibbosa at Belawan PPS has overfishing in 2014 with a production of 2085 tons and total 47 fishing trip.
Exploration and effectiveness test of the potassium solvent bacteria originating from limestone mountain of Bahorok Langkat
Authors: Bangun I H , Hanum H , Sabrina T 
Published: April 2020

Abstract
Plants need potassium in large quantities. The dissolved potassium concentrations are only 1-2%, meanwhile more than 90% of potassium in the soil is in the form of soluble rock. Potassium solvent bacteria facility in dissolving K. From several studies, potassium solvent bacteria can be found in limestone quarries. One of the limestone mountains in North Sumatera is the mountains in Laudamak village, Bahorok sub-district, Langkat District. This study aimed to obtain the potassium solvent bacteria and examine their potential of superior isolates from Bahorok Langkat mountain limestone. Sampling was conducted by the purposive random sampling method which was in two different locations and two different soil depths, namely on the mountain slop and foot of the limestone mountain. The ability to dissolve K was tested qualitatively by calculating the dissolution index (IP). The hypersensitivity test was carried out on tobacco leaves. The result showed that 18 isolates found from 10 soil sample from Bahorok Langkat limestone mountain were able to dissolve K in the Aleksandrov medium, there were 11 isolates that were able to dissolve K and 11 of selected isolates were not pathogenic to plants.
Land characteristics and land evaluation for development of the area of other uses (APL) in Siempat Rube Sub District Pakpak Bharat District
Authors: Rahmawaty  , Rauf A , Sitorus A , Harahap F S , Walida H 
Published: April 2020

Abstract
The opening of a new area needs to be investigated so that its land resources can be used to determine land suitability for certain uses so that the area of other uses (APL) in Siempat Rube Sub-district needs to be supported with information on land suitability. The purpose of this study was to evaluate the characteristics of APL land suitability level and analyse improvement efforts to increase productivity on APL in Siempat Rube District. The research was used the survey method. Units of land were based on land maps. The research data were analysed using the matching method. Soil characteristics in Siempat Rube Sub district, both physical and chemical, have very diverse characteristics which can be a limiting or supporting factor in the development of agricultural crops, especially the development of irrigated rice fields. The actual land suitability for paddy fields were not suitable (N) (2629.44 ha) and marginally suitable (S3) (638.26 ha). After efforts to improve the level of potential land suitability for paddy to become not suitable (N) covering an area of 29.31 ha and marginally suitable (S3) covering an area of 3238.39 ha.
Integrated GIS and GPS for mapping of land suitability for Multy Purpose Tree Species (Persea americana) at community agroforestry land in Peria-ria Village
Authors: Rahmawaty  , Marpaung R M E , Rauf A , Batubara R 
Published: April 2020

Abstract

Persea americana is known as the Multy Purpose Tree Species (MPTS), which comes from the Lauraceae family. In community agroforestry land in Deli Serdang Regency. The objective of this study was to map the suitability of land for Persea americana in Peria-ria Village. This research was conducted using survey methods. Soil samples are collected from survey results in the field based on land units, then the coordinates were marked using the Global Positioning System (GPS). To create a map of land suitability class distribution, Geographic Information System (GIS) technology was used. In land suitability study, were adopted from the Soil and Agro-climate Research Centre, Bogor, West Java, Indonesia, namely: references and land suitability criteria for Agricultural Plants. The actual land suitability for Persea americana is not suitable (N) (98.55%) and marginally suitable (S3) (1.45%) and potential land suitability for Persea americana is marginally suitable (S3) (1.45%) and moderately suitable (S2) (98.55%) in Peria-ria Village, Biru-Biru Sub district. Water availability (wa), erosion hazard (er) and root zone media (rc), were limiting factors. The most difficult constrain to overcome were the root zone medium and water availability.
Hamparan perak paddy local cultivar performance applicated with biochart and planting distance as multiple crop between row of one year old hevea
Authors: Hutapea S , Siregar T H S , Astuti R 
Published: April 2020

Abstract
The low price of natural rubber in last 10 years has the impact on low income of the smallholder rubber plantation. Intensity of tapping and management of Hevea crop had decreased. In other side, space between rows of Hevea could be managed to produce food when Hevea in Immature Periods, hence could be beneficial to the smallholder rubber plantation. This research evaluated paddy land local cultivar, Hamparan Perak, which produce the red rice, applied by biochart created from Hevea seed shell. Research was conducted with 12 combination treatments in 1x1 m2 plot size. Bicohart with 0 kg/plot, 0.5 kg/plot, and 1.5 kg/plot, combined with planting distance 20x20 cm, 25x25 cm and 30x30 cm of Hamparan Perak cultivar. Results found that biochart had significant effect on amount of panicles, but it was not significantly different effect on growth and yield. Planting distances had significant effects on crop height and amount of tillers but were not significantly different on 1000 grain weight and grain yield. Biochart has long term effects, hence it will be valuable for Hevea. The research still continue to the known growth and yield of paddy land due to the growth of Hevea canopy.
Performance of vegetative and reproductive characters of some maize inbred line (Zea Mays L.) in ultisol soil applied with the coffee skin compost
Authors: Lubis K , Panjaitan D R , Setiado H 
Published: April 2020

Abstract
The objective of the research was to obtain the information of the performance of vegetative and reproductive characters of some maize inbred line on marginal land such as ultisol soil with coffee skin compost. The research was conducted on the experimental house of the Faculty of Agriculture, University of North Sumatera, Medan from October 2018 to February 2019. The split plot design by providing coffee skin compost as the main plot (without giving coffee skin compost; 2.5 kg coffee skin compost: 7,5 kg of ultisol soil; 5 kg of coffee skin compost: 5 kg of ultisol soil) and maize inbred line as subplots (G1: inbred line E, G2: inbred line B, G3: inbred line P, G4: inbred line K). The results showed that the interaction of coffee skin compost with inbred line had a very significant effect on the character of harvest age, cob length and cob weight. Strain B shows a better response for vegetative and generative characters.
Yield and tuber quality of orange-fleshed sweet potato cultivars under drought stress in greenhouse
Authors: Rahmawati N , Lahay R R , Irmansyah T , Mawarni L 
Published: April 2020

Abstract
Water shortage is an environmental stress that affects the growth, quantity and quality of sweet potato production. The study objective was to analyse the effect of drought stress on the quantity and quality of orange-fleshed sweet potato. Field research has been carried out in April to July 2019 in the greenhouse. This research used a randomized block design with two factors, the first factor was sweet potato cultivars (Beta-1 variety, Perbaungan cultivar, Cengkeh Turi cultivar and Tanah Seribu cultivar) and the second factor was drought stress with different watering level namely severe drought (watered until 1 month and until 2 months with 10 days interval, respectively) and control (watered until 4 months with 10 days interval). The results showed that the orange-fleshed sweet potato cultivars produced significantly different average tuber weights, the number of tubers, beta carotene content, starch content and tuber moisture content were not significantly different. Drought stress influences the yield and quality of tubers which causes a very significant decrease in the parameters of number of tuber, tuber weight, beta carotene content, starch content and tuber water content. The higher the level of drought will cause a decrease in the quantity and quality of sweet potato production.
Cytotoxicity of Alstonia scholaris (R.Br) bark on MCF-7 and Vero cell lines
Authors: Zuraida  , Mariya S 
Published: April 2020

AbstractAlstonia scholaris R.Br(pulai) is one of traditional forest plant to treat many kinds of disease such as arthritis, diabetes, hypertension, and hyperlipidaemia. On the other hand research about this species as anti cancer is very limited. This study aimed to determine in vitro cytotoxic activity of three fraction ofA. Scholarisbark against breast cancer (MCF-7) and normal (vero) cells. Three fractions ofA. Scholaris bark(n-hexane, chloroform, and ethanol fractions) derived from 70% ethanol crude extracted pulai bark. MTT (3- 4,5-dimethylthiazol-2- -2,5-diphenyl tetrazolium bromide) assay applied tot MCF-7 and vero cells. The result showed that n-hexane fraction had the strongest cytotoxic effect on MCF-7 cells, followed by chloroform and ethanol fraction with IC50values 109.01; 163.33; and 264.19 µg/mL respectively, but ethanol fraction is the least toxic on vero cells growth compared to n-hexane and chloroform fraction with IC50value 579.93; 459.47; and 396.24 µg/mL respectively. It’s suggested that ethanol fraction is the best recommended fraction as anticancer agent because it was the least toxicity to the growth of normal cells, but still toxic to cancer cell. It was concluded that ethanol fraction was the best fraction to breast cancer cells.
Isolation of non-symbiotic Nitrogen-fixing bacteria on andisol land affected by Sinabung eruption
Authors: Zebua A C , Guchi H , Sembiring M 
Published: April 2020

Abstract
Andisol soils affected by the eruption of Mount Sinabung have different levels of ash thickness, each thickness has a different microbial activity and nutrient status. The aim of this research was to find non-symbiotic nitrogen-fixing bacteria isolates in several volcanic ash thicknesses. This research was conducted at the Soil Biology Laboratory, Faculty of Agriculture, University of Sumatera Utara. Isolation of non-symbiotic nitrogen-fixing bacteria was carried out using a nitrogen-free growth medium, Jensen medium. The results indicated that 7 bacterial isolates were able to grow on nitrogen-free medium, these isolates had different shapes (B1- B7). In the land which is not covered with ash there are 2 isolates, in the soil covered in thin ash (<2 cm) there are 2 isolates, in the soil covered in medium ash (2-5 cm) there are 2 isolates and in the soil covered in thick ash (> 5 cm) there are 1 bacterial isolate.
Various impacts of Sinabung eruption volcanic ash thickness with different vegetation on the microorganism population in andisols
Authors: Qadaryanty I , Sembiring M , Hidayat B 
Published: April 2020

Abstract
The aim of this research is to observe the impact of various thicknesses of volcanic ash and different vegetation on microorganism populations in Andisol affected by the eruption of Mt. Sinabung in NamanTeran Sub-district, Karo district, which was affected by the eruption of Mt. Sinabung after 5 years of eruption which is distinguished by several ash thicknesses, namely: A0: 0cm (already processed), A1: <2 cm (thin), A2:> 2-5 cm (moderate), A3:> 5 cm (thick) with annual plant vegetation and grass vegetation. Soil sampling was using the survey method. Calculation of total soil microorganisms was done by the Total Plate Count method. The results indicated that the higher the pH, C-organic, humidity and temperature, the more microorganism population, also different thickness of ash and vegetation affected the number of microorganism population.
Application of bamboo shoot extract as natural plant growth regulator on the growth binahong (Anredera cordifolia (Ten.) Steenis.) in Tanah Karo
Authors: Hasibuan A R , Mawarni L , Hasanah Y , Irsal  , Fatiani  
Published: April 2020

Abstract
The application of bamboo shoot extract as natural plant growth regulator can affect plant growth of binahong. The objective of the research is to evaluate the growth response of binahong on the application of bamboo shoot extract. The research was conducted in Balai Penelitian Sayuran (Balitsa) in Tongkoh Village, Dolat Rakyat, Tanah Karo, Sumatera Utara on April to August 2019. The experimental design was a factorial Randomized Block Design with two factors. The experimental design was the Randomized Block Design with two factors. The first factor is the plant of origin from Tanah Karo (accession 1; accession 2; accession 3). The second factor is the dose of bamboo shoot extract (without treatment; 20%, 40%, 60% of bamboo shoot extract). The parameter observed were plant length, shoot dry weight and root dry weight. The results showed that the application of bamboo shoot extract significantly increased the plant length at 5-10 week after planted, whereas the application of bamboo shoot extract did not significantly effect on shoot dry weight and root dry weight.
Analysis of physiological characters and yield quality of several sweet potato (Ipomoea batatas L.) genotypes at various watering levels in rainfed paddy field
Authors: Arifina E V , Rahmawati N , Lahay R R 
Published: April 2020

Abstract
Analysis of the physiological characteristics of several sweet potato genotypes at various watering levels in rainfed paddy field indicated that the adaptability of sweet potato genotypes was resistant to drought stress. This research aims to determine the physiological character and yield quality of several sweet potato genotypes (Beta 1 Variety, Perbaungan Accession, and Cengkeh Turi Accession) at various levels of watering (P1 (1 month watering), P2 (2 months watering), and P3 (4 months watering)) in rainfed paddy fields. The research was carried out in the paddy field of Tandem Hilir I Village Deli Serdang and the analysis was carried out in the Tissue Culture Laboratory of the Faculty of Agriculture, the University of Sumatera Utara from March-July 2019. The results of this research indicated that some sweet potato genotypes had no significant effect on the physiological character but had a significant effect on fresh tuber grading. Cengkeh Turi accessions with orange colour tuber had the highest production in the A-class fresh tuber grading category while the Perbaungan accession with orange colour tuber had the lowest production in C-class fresh tuber grading. The watering levels treatment also did not have a significant effect on the physiological character and tuber yield quality.
The effect of the weight of potato tuber seeds and the duration of cytokinin application on potato tuber (Solanum tuberosum L.) dormancy release
Authors: Turnip L , Siregar L A M , Damanik R I M 
Published: April 2020

Abstract
Potato seeds function as the main production medium in the plant cultivation which requires application of plant growth substances as stimulator of grow. This study aims to determine the effect of tuber weight and cytokinin immersion treatment time on breaking the dormancy period of potato tuber. This research was carried out at the seed warehouse of UPT Benih Induk Hortikultura Kutagadung Berastagi. This research was conducted using factorial completely randomized design, with 2 factors. The first factor, the weight of potato tubers of 4 levels and the second factor, cytokinin immersion time of 5 levels. The results showed that the fastest dormancy breaking was on the 45 DAH immersion i.e. 61.75 days, 12.58 days faster than without immersion, or 6.42 days faster than the 1 DAH immersion treatment. The fastest dormancy breaking is in potato tuber weighing 115-125 g (60.07 days), 13.47 days faster than tuber weighing 25-35 g. The fastest dormancy breaking was at B4W4 treatment (55 days). The number and weight of sprouts increases with increasing immersion time, and with increasing tuber weight.