scholarly journals Effect of different seedling weights on Kappaphycus alvarezii growth

2021 ◽  
Vol 890 (1) ◽  
pp. 012029
Author(s):  
M Irfan ◽  
N Abdullah ◽  
W La Ujiara
Keyword(s):  
Kappaphycus Alvarezii ◽  
Economic Value ◽  
Mean Value ◽  
Absolute Weight ◽  
Seaweed Species ◽  
Average Value ◽  
Weight Growth ◽  
Determine Effect

Abstract Seaweed K. alvarezii is one of leading commodities in aquaculture because this seaweed species produces carrageenan which has high economic value. This study aimed to determine effect of different seedling weights on the growth of seaweed K. alvarezii, and to determine which seedling weight had the best effect on seaweed growth. Planting process was carried out using longline method. Size of longline construction used was 10 m x 20 m, with a length of 20 m and a distance of 1 m between each ropes. Each rope line contained about 66 clumps of seedlings with a distance between clumps of 15 cm. Thallus weight used was 30 gr, 50 gr, 70 gr for each treatment. The highest mean value of absolute weight growth of seaweed K. alvarezii was found in treatment C (thallus weight 70 gr) with an average value of 99.27 gr, followed by treatment A (thallus weight 30 gr) of 51.95 gr and the lowest value found in treatment B (thallus weight 50 gr) of 51.65 gr.

scholarly journals Effect 17α-Metiltestosterone Hormone with Different Dosage to Percentage Male Sex, Absolute Weigh Growth, and Survival to Congo Tetra Fish (Micraleptus interruptus)

2020 ◽  
Vol 13 (2) ◽  
pp. 391
Author(s):  
Muhammad Irfan ◽  
Nursanti Abdullah ◽  
Siti Fadilla Paputungan
Keyword(s):  
Economic Value ◽  
Male Fish ◽  
Absolute Weight ◽  
Growth And Survival ◽  
Average Percentage ◽  
Average Value ◽  
Service Unit ◽  
Male Sex ◽  
The Right ◽  
Different Doses

Congo Tetra fish is one of the freshwater ornamental fish species which is in great demand because of its high economic value. Male congo tetra fish have a higher selling value than female fish, because the morphology of their bodies looks more attractive, especially their brighter colors and long fins. Sex reversal technology is one technique that can be used to obtain male monosexual offspring.The hormone 17α-methyltestosterone in male fish can increase spermatogenesis and determine secondary sex markers in male fish through the formation of sexual characteristics in fish morphology and body color. The administration of the hormone 17α-methyltestosterone with the right dose can increase the percentage of male sex of Congo Tetra fish. The purpose of this study was to determine the effect of the hormone 17α-methyltestosterone with different doses on the percentage of male sex, absolute weight growth, and survival of congo tetra fish, to determine which 17α-methyltestosterone hormone dose had the best effect on the percentage of male sex, growth in absolute weight, and survival in congo tetra fish. This research was conducted at the Regional Technical Service Unit of the Fish Seed Center for Ternate City. The time for conducting the research starts from March to May, 2020. In this study, 4 treatment doses of hormones were used, each treatment was repeated 3 times. The treatments tried were as follows: Treatment A: Dose 2 mg/l, Treatment B: Dose 3 mg/l, Treatment C: Dose 4 mg/l, Treatment D: Dose 0 mg/l (control).The results showed that the hormone 17α-methyl testosterone with different doses had a very significant effect on the male sex percentage of congo tetra fish, but it was not significantly different on the growth in absolute weight and survival of congo tetra fish. The highest average percentage of male sex in congo tetra fish was found in treatment C (dose 4 mg/l) which was 86.6%, the highest average value of growth in absolute weight was found in treatment A (hormone dose 2 mg/l) of 1.083 g, and the highest survival was found in treatment D (control) of 90.473%.

scholarly journals PENGARUH KONSENTRASI ROOTONE-F DAN PANJANG SETEK PADA PERTUMBUHAN Rhododendron mucronatum G. Don. var. phoeniceum

2017 ◽  
Vol 21 (1) ◽  
pp. 35
Author(s):  
DYAN M.S. PUTRI
Keyword(s):  
Block Design ◽  
Economic Value ◽  
Ornamental Plants ◽  
Mean Value ◽  
Seedling Height ◽  
Stem Cuttings ◽  
Average Value ◽  
Randomized Block Design ◽  
Two Factors ◽  
Number Of Leaves

Rhododendron mucronatum G. Don. var. phoeniceum is one of ornamental plants that have high economic value and aesthetics. Problems that often experienced in propagation this plant are difficulties in producing roots on cutting and limited availability of seeds on the market. This study aims to determine the effect of plant growth regulators (Rootone-F) and length of stem cuttings on the growth of R. mucronatum G. Don. var. phoeniceum. This study employed completely randomized block design with two factors and three replications. The first factor is concentration of Rootone-F (0, 150, 300, and 450 mg/L) and the second factor is length of stem cuttings (15; 25; and 35 cm). The results showed that the concentration of Rootone-F and cuttings length has significant effect (? <0.01) to number of leaves, roots and seedling height; and cuttings length was highly significant (? <0.05) to the seedling height. Rootone-F optimum concentration for the cuttings growth of shoot R. mucronatum G. Don. var. phoeniceum is 450 mg/L which is indicated by the average value of the number of leaves as much as 8.8 leaves, the average value of the number of roots as much as 9.6 and a mean value of 0.90 cm tall seedlings when compared with controls. Cuttings with 35 cm long provide seed growth R. mucronatum G. Don. var. phoeniceum. The highest indicated by the mean number of leaves as much as 6.6 leaves, the average value of the number of roots of 8.6 and a mean value of 0.88 cm additional seedlings height compared to cuttings at 15 cm length and 25 cm.

Economic Value of Pavement for the Elderly: Case Study of Bangkok, Thailand

2018 ◽  
Vol 9 (11) ◽  
pp. 927-937
Author(s):  
Somskaow Bejranonda ◽  
◽  
Aekkapat Laksanacom ◽  
Waranan Tantiwat ◽  
◽  
...  
Keyword(s):  
Contingent Valuation Method ◽  
Economic Value ◽  
The Elderly ◽  
Pavement Management ◽  
Sustainable Urban Development ◽  
Public Facility ◽  
Average Value ◽  
Valuation Method ◽  
The People ◽  
The City

Based on the concept of a livable and global age-friendly city, pavements are a public facility that the city should provide to the people. Appropriate pavements will be beneficial for the people, particularly for good quality of life for the elderly to move around in the city. This study explored the behaviour of the elderly in the use of pavements and the problems confronted. The study also evaluated the value of the pavement walking area as it reflected the benefits of pavements to the elderly by applying the Contingent Valuation Method (CVM). During March-May 2017, data were collected using interviews with 601 elderly living in Bangkok. The study indicated that the main problem for senior citizens regarding their use of pavements was from being disturbed by motorbikes riding on the pavements. The average value of pavement for the elderly was about THB 160 (USD 5.30) per person per year. Thus, the benefits of pavements to the elderly in Bangkok was approximately THB 158 million (USD 5.2 million) per year. Thus, policy makers should make proper budget allocations for elderly-friendly pavement management and seriously address the problems confronting the elderly in using pavements, to maximize the usefulness of pavements not only for the elderly but also for the public and to support a sustainable urban development.

scholarly journals Thinner Sea Ice Contribution to the Remarkable Polynya Formation North of Greenland in August 2018

2021 ◽  
Author(s):  
Xiaoyi Shen ◽  
Chang-Qing Ke ◽  
Bin Cheng ◽  
Wentao Xia ◽  
Mengmeng Li ◽  
...  
Keyword(s):  
Sea Ice ◽  
Ice Cover ◽  
Reanalysis Data ◽  
Mean Value ◽  
Ocean Model ◽  
North Coast ◽  
Average Value ◽  
The North ◽  
Wind Sea ◽  
The One

AbstractIn August 2018, a remarkable polynya was observed off the north coast of Greenland, a perennial ice zone where thick sea ice cover persists. In order to investigate the formation process of this polynya, satellite observations, a coupled ice-ocean model, ocean profiling data, and atmosphere reanalysis data were applied. We found that the thinnest sea ice cover in August since 1978 (mean value of 1.1 m, compared to the average value of 2.8 m during 1978–2017) and the modest southerly wind caused by a positive North Atlantic Oscillation (mean value of 0.82, compared to the climatological value of −0.02) were responsible for the formation and maintenance of this polynya. The opening mechanism of this polynya differs from the one formed in February 2018 in the same area caused by persistent anomalously high wind. Sea ice drift patterns have become more responsive to the atmospheric forcing due to thinning of sea ice cover in this region.

Resistance of a Ship Undergoing Oscillatory Motion

2010 ◽  
Vol 54 (02) ◽  
pp. 120-132
Author(s):  
Lawrence J. Doctors ◽  
Alexander H. Day ◽  
David Clelland
Keyword(s):  
Finite Depth ◽  
Mean Value ◽  
Wave Resistance ◽  
General Effect ◽  
Towing Tank ◽  
Ship Model ◽  
Average Value ◽  
Unsteady Effects ◽  
Oscillatory Cycle ◽  
Resistance Tests

In this paper, we describe extensions to the research of Doctors et al. (Doctors, L. J., Day, A. H., and Clelland, D., 2008, Unsteady effects during resistance tests on a ship model in a towing tank, Journal of Ship Research, 52, 4, 263–273) and Day et al. (Day, A. H., Clelland, D., and Doctors, L. J., 2009, Unsteady finite-depth effects during resistance tests in a towing tank, Journal of Marine Science and Technology, 14, 3, 387–397) in which the oscillations in the wave resistance during the constant-velocity phase of a towing-tank resistance test on a ship model were measured and predicted, in the cases of relatively deep and relatively shallow water. In the current study, the ship model was towed with a harmonic velocity component superimposed on the usual constant forward velocity. This work constitutes a first step in the understanding of the unsteady hydrodynamics of a racing shell (rowing boat). We show here that the unsteady wave resistance varies considerably from the traditional (steady) average value. Indeed, the wave resistance is frequently negative during part of the oscillatory cycle. However, the general effect is an increase in the temporal mean value of the wave resistance; this suggests that every effort should be made to reduce the unsteadiness of the motion. We also demonstrate that the unsteady wave-resistance theory provides an excellent prediction of the measured effects summarized here. These predictions are often within a few percent of the measured values of the resistance.

scholarly journals Mandibular Morphology Differences Between Edentulous And Dentate Assessed By Panoramic Radiographs

2017 ◽  
Vol 16 (2) ◽  
Author(s):  
Lidya Irani Nainggolan ◽  
Aude Layakni Girsang
Keyword(s):  
Panoramic Radiography ◽  
Mechanical Stimulus ◽  
Mean Value ◽  
Notch Depth ◽  
Cross Sectional ◽  
Gonial Angle ◽  
Average Value ◽  
Mandibular Morphology ◽  
Edentulous Patients ◽  
Ramus Height

Introduction: Facial profile can be influenced by edentulous condition that can change mandibular morphology that can affect mastication, digestion and psychosocial life. Edentulism causes absence of occlusal mechanical stimulus, decrease the activity of mastication muscles and increase mandibular bone resorption. These changes can be assessed using panoramic radiography by looking at the vertical dimension of the head of the condyle and its shape, ramus, and the angle of the mandible. The aim of the study was to assess the mean value and differences of mandibular morphology in edentulous and dentate patients using panoramic radiography. Materials and Methods: This was an analytical study with cross-sectional approach using purposive sampling methods. 50 dentate and edentulous patients who came to Dentistry Hospital of University of Sumatera Utara were used as sample. Data analysis was done using Independent T test and MannWhitney test. Results: Results showed that the average value of gonial angle, ramus height, condylar height, antegonial notch depth and ramus notch depth in edentulous patients were 125,38 ± 9,51; 35.98mm ± 4.26; 5.58mm ± 0.90; 2.11mm ± 1.04; and 2.73mm ± 0, 88, and the results showed that the average value of mandibular morphology in dentate patients were 123.34 ± 7.07; 38.15mm ± 3.23; 6.95mm ± 1.25; 1.41mm ± 0.77; and 2.15mm ± 0.59. Conclusion(s): There were significant differences in the values of ramus height, condylar height, antegonial notch depth, and ramus notch depth. Difference was also found in gonial angle value, but was not statistically significant.

scholarly journals Administration of Probiotic sanolife Mic-S on Biological Performance of Vanamei Shrimp (Litopenaeus vannamei) PL 10

2021 ◽  
Vol 3 (8) ◽  
pp. 42-57
Author(s):  
Hasim Hasim ◽  
Nadia Baidi ◽  
Syamsuddin Syamsuddin ◽  
Rully Tuiyo
Keyword(s):  
Feed Efficiency ◽  
Economic Value ◽  
Feed Conversion ◽  
Shrimp Culture ◽  
Growth And Survival ◽  
Crude Fiber Content ◽  
Weight Growth ◽  
Randomized Design ◽  
Biological Performance ◽  
Different Doses

Vannamei shrimp is a fishery commodity that has important economic value for Indonesia. This is indicated by the increasing number and value of exports of this commodity. One of the efforts to encourage the production of vaname shrimp is through the use of probiotics. sanolife-MIC is a probiotic widely used in shrimp culture. The aim of the study was to analyze the feed profile and biological performance of Vaname PL 10 shrimp fed pellets with the Sanolife MIC-S probiotic capsule at different doses. The research method used is an experimental method using a completely randomized design (CRD) with four treatments (A: probiotic 0 gr/kg feed; B: probiotic 10 gr/kg feed; C: probiotic 12 gr/kg feed; D: probiotic 14 g/kg feed) and three replicates. What was tested in the study were probiotic profile tests, growth, feed efficiency and feed conversion. The data obtained were analyzed using ANOVA. The results showed that the feed profile that was encapsulated using sanolife MIC-S, the protein value, moisture content and ash content for the feed were shown by treatment B. The best fat content was treatment C. The best crude fiber content was treatment D. Weight growth rate, ratio The best feed conversion and feed efficiency was shown by treatment B, while the length growth and survival was indicated by treatment C.

scholarly journals Pengembangan LKPD Tema Tanah Airku Sub Tema Kota Palembang untuk Anak Kelompok B

2019 ◽  
Vol 1 (2) ◽  
pp. 129-141
Author(s):  
Gustiana Yuantini ◽  
Hasmalena Hasmalena ◽  
Syafdaningsih Syafdaningsih
Keyword(s):  
Small Group ◽  
Mean Value ◽  
Average Score ◽  
Self Evaluation ◽  
Average Value ◽  
Expert Review ◽  
Group Evaluation ◽  
Observation Methods ◽  
Evaluation Stage ◽  
Group B

This research aims to develop valid and practical student worksheet. Subjects in this research were B2 and B3 groups in state kindergarten of Pembina 2 Palembang. The model developed in this development was Rowntree consisting of One to one evaluation and small group evaluation. It was aimed to see the practicality and it used the Tessmer evaluation stage which consisted of self evaluation, expert review. Data collection techniques used in this research were interview, walkthrough and observation methods. According to the results of the research, it showed that the validity of the material and design obtained an average value of 3.77 in very valid categories. Student worksheet practicality test in terms of observations with a mean value of 95% in very practical category. The small group evaluation stage obtained an average score of 92% in the very practical category. Questionnaire result was 97% in valid category. From the result, it can be concluded that student worksheet theme of my homeland and sub-theme of Palembang city for group B children is valid and practical. It is also worth to use as learning student worksheet with Theme of my homeland

scholarly journals Quantitative Ethobotany of Gnetum africanum Welw. (Gnetaceae) in Massoumboum, Littoral Region of Cameroon

2019 ◽  
Vol 8 (2) ◽  
pp. 19
Author(s):  
Jean Lagarde Betti ◽  
Pascal Eric Billong Fils ◽  
Prisca Toffon ◽  
Eric Wété ◽  
Jules Romain Ngueguim ◽  
...  
Keyword(s):  
Economic Value ◽  
Sampling Rate ◽  
Quantitative Ethnobotany ◽  
Distribution Area ◽  
Ethnobotanical Survey ◽  
Average Value ◽  
Forest Inventories ◽  
Littoral Region ◽  
The City ◽  
Cfa Franc

Gnetum africanum Welw. is a plant specie of Central and West Africa, a Non Timber Forest Product (NTFP) with high nutritional, medicinal and economic value. In Cameroon, its leaves are recognized by the forestry administration as a special product. Strong demand combined with destructive harvesting techniques has resulted in its rarity in its distribution area. The objective of this work is to characterize the harvesting and trade of G. africanaum, and to assess its abundance (density and structure) in order to appreciate the economic value of the Lehman agroforest system (ALM) based in Massoumboum, a village located at 30 Km of Douala town, the economical capital of Cameroon. An ethnobotanical survey was conducted among harvesters and sellers of G. africanum in the ALM and in adjacent markets. An inventory of G. africanum stems and leaves was carried out at an overall sampling rate of 9.52%. The study revealed that, harvesting of G. africanum is freely done by women, youngers and elders. They start their activity early in the morning and convey their products to markets located in the periphery and inside the city of Douala. The price of the gramme is too high in the periphery than in the city, averaging 0.58 CFA franc. This price is high in the dry season due to the scarcity of other agricultural vegetables. The inventories conducted revealed densities of 6 191 stems/ha and 119&nbsp;548 leaves/ha, with the high density of leaves obtained in less perturbed plots. The combination of field data (forest inventories) with those obtained in the markets (trade data), what we call &laquo;&nbsp;quantitative ethnobotany&nbsp;&raquo;, allowed us to appreciate the temporal economic value (EV) of the ALM. This EV ranges from 500&nbsp;000 - 700&nbsp;000 CFA franc, for an average value of 37 059.9 CFA franc /ha. If well managed, G. africanum can contribute not only to the economy of the women-harvesters, but also to the economy of the ALM. The glaring development challenge of the background of what precedes is the development of non-detriment findings (NDF) for G. africanum in Cameroon. These consist of setting tools which aims to sustain the resource and trade such as the delimitation of Gnetum Allocation Units (GAU), as well as the development and implementation of simple management plans (SMPs).

scholarly journals Pengaruh Model Pembelajaran Problem Based Learning pada Materi Hukum-Hukum Dasar Kimia terhadap Hasil Belajar Siswa Kelas X MAN 2 Model Palu

2018 ◽  
Vol 7 (3) ◽  
pp. 102
Author(s):  
Tri Sulistiyawati Lamalat ◽  
Supriadi Supriadi ◽  
Siti Nuryanti
Keyword(s):  
Statistical Analysis ◽  
Learning Outcomes ◽  
Problem Based Learning ◽  
Sampling Technique ◽  
Learning Model ◽  
Mean Value ◽  
Control Group ◽  
Control Group Design ◽  
Average Value ◽  
Quasi Experimental

Research on the effect of the problem-based learning model in the basic laws of chemistry on student’s learning outcomes in class X MAN 2 Model Palu has been done. This study aimed to determine the effect of the application of the problem-based learning model in the basic laws of chemistry on student’s learning outcomes in class X MAN 2 Model Palu. The type of research was a quasi-experimental study non-randomized design with pretest-posttest control group design. The sample was conducted with a purposive sampling technique. The study sample was students in class X MIA 6 as an experimental group (n = 22) and students in class X MIA 3 as a control group (n = 22). The data testing of students' learning outcomes used a non-parametric statistical analysis, the analysis of Mann-Whitney U-Test. The research results indicated that the mean value of the experiment class was high compared to the control class, 22.61 >18.39. The statistical analysis obtained that sig. 2-tailed (0,032) ˂ 0.05 and Zcalculation (-2.149) ˂ Ztable (-1.96). The average value of the experiment class was 82.95 while the average value of the control class was 73.64. So it can be concluded that there is the effect of applying the problem-based learning model in the basic laws of chemistry on student’s learning outcomes. 

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