scholarly journals Pengaruh Komposisi Larutan Pulsing dan Lama Perendaman Terhadap Kesegaran Bunga Potong Mawar Putih (Rosa Hybride L.) Selama Penyimpanan

2021 ◽  
Vol 9 (2) ◽  
pp. 259
Author(s):  
David Romario Sipayung ◽  
Ida Ayu Rina Pratiwi Pratiwi ◽  
Pande Ketut Diah Kencana
Keyword(s):  
Citric Acid ◽  
Test Score ◽  
Average Rate ◽  
Score Test ◽  
Solution Treatment ◽  
Rosa Hybrida ◽  
Total Absorption ◽  
Weight Changes ◽  
Color Test ◽  
Soaking Time

ABSTRAK Penelitian ini bertujuan untuk mengetahui pengaruh dan mendapatkan perlakuan yang terbaik dari larutan pulsing dan lama perendaman sebagai larutan perendam untuk memperpanjang masa kesegaran bunga potong Mawar Putih (Rosa hybrida L.). Penelitian ini menggunakan metode Rancangan Acak Lengkap (RAL) dengan dua faktor percobaan. Faktor pertama adalah komponen larutan pulsing terdiri 3 bagian yaitu: Sukrosa 5% + 250 ppm AgNO3 + Asam Sitrat 75 ppm, Sukrosa 10% + 500 ppm AgNO3 + Asam Sitrat 150 ppm dan Sukrosa 15% + 650 ppm AgNO3 + Asam Sitrat 300 ppm. Faktor kedua adalah lama perendaman terdiri dua bagian yaitu: 4 jam dan 8 jam. Analisa dilakukan setiap dua hari sekali dengan penggantian air setiap dua hari sekali yang disimpan dalam suhu ruang (27±1)0C selama 12 hari. Kombinasi perlakuan larutan pulsing dan lama perendaman berpengaruh sangat nyata (p<0,01) terhadapan serapan total serta tidak berpengaruh nyata (p>0,05) terhadap perubahan berat, uji skor warna, kelayuan, bent neck dan tingkat kemekaran. Kombinasi perlakuan terbaik adalah larutan pulsing Sukrosa 15% + 650 ppm AgNO3 + Asam Sitrat 300 ppm dengan lama perendaman 8 jam menghasilkan rata-rata serapan total 10,48 ml, rata-rata perubahan berat 9,8%, rata-rata uji skor warna 3,2, rata-rata uji skor tingkat kelayuan 3,6, rata-rata uji skor bent neck 3,6 dan rata-rata tingkat kemekaran bunga 63,89%. ABSTRACT The research aims to determine the effect of pulsing solutions and soaking time to extend the freshness of the white roses cut flower (Rosa hybrida L.) as well as to obtain the best treatments combination of the two variables. The research consists of 8 treatment combinations, each treatment was repeated 3 times to obtain 24 treatments. The research uses a completely randomized design (CRD) method with two experiment factors. The first factor is the component of the pulsing solution consisting of 3 parts: Sucrose 5% + 250 ppm AgNO3 + Citric Acid 75 ppm, Sucrose 10% + 500 ppm AgNO3 + Citric Acid 150 ppm and Sucrose 15% + 650 ppm AgNO3 + Citric Acid 300 ppm. The second factor is the immersion time consists of two parts, namely: 4 hours and 8 hours. The analysis was carried out every two days with replacement of water every two days stored at room temperature (27 ± 1)0C for 12 days. The combination of pulsing solution treatment and soaking time had a very significant effect (p<0.01) on the total absorption and had no significant effect (p>0,05) on changes in weight, color score test, withered, bent neck, and efflorescence of level. The best combination of treatments solution pulsing treatment is 15% sucrose + 650 ppm AgNO3 + 300 ppm Citric Acid with 8 hours immersion resulting in an average total absorption of 10,48 ml, an average rate of weight changes 9,8 %, the average color test score was 3.2, the average wilt level test score was 3.6, the average bent neck test score was 3.6 and average rate of flowering 63,89%. It can be concluded that white roses are affected by the concentration of the pulsing solution because the concentration of the pulsing solution gives changes to white rose cut flowers.

scholarly journals Application of Remote Online Learning in Oral Histopathology Teaching: An Acute Response to the COVID-19 Pandemic  

2020 ◽  
Author(s):  
yi zhong ◽  
Wen Sun ◽  
Wei Zhang ◽  
Laikui Liu ◽  
Yan Xu ◽  
...  
Keyword(s):  
Test Score ◽  
Score Test ◽  
Virtual Microscopy ◽  
Dental Students ◽  
Traditional Group ◽  
Acute Response ◽  
Learning Platform ◽  
The Mean ◽  
Online Group ◽  
Remote Learning

Abstract Background: The aim of this study was to investigate the experience of the combination of remote learning and virtual microscopy in oral histopathology teaching, a unique experience in China in response to the Covid-19 pandemic.Methods: 192 third-year dental students were recruited to participate in the course independently on the E-learning platform and Virtual Simulation Experiment Teaching Center of Stomatology of Nanjing Medical University. A questionnaire survey explored students' satisfaction with the education. Differences of assessment results among different groups were compared using Mann-Whitney U and independent-sample T tests.Results:The mean Theory test scores of the Online group (80.93±12.15) were significantly higher than those of the Traditional group (73.65±8.46) (P < 0.01). The mean total scores of the Online group (82.94±10.76) were significantly higher than those of the Traditional group (77.25±7.55) (P < 0.01). The percentage of high total test score (test score > 85) of the Online group (54%) was also significantly higher than that of the Traditional group (15%) (P< 0.01). Furthermore, both remote learning and virtual microscopy courses were well accepted by students according to the questionnaire. Conclusions: The application of remote learning and virtual microscopy have enhanced oral histopathology teaching in China in response to the Covid-19 pandemic.

scholarly journals Pengaruh Lama Perendaman Dalam Larutan Natrium Metabisulfit Terhadap Karakteristik Tepung Labu Kuning

2019 ◽  
Vol 4 (3) ◽  
pp. 115-124
Author(s):  
Ulfa Reza ◽  
Bambang Sukarno Putra ◽  
Diswandi Nurba
Keyword(s):  
Moisture Content ◽  
Water Content ◽  
Test Data ◽  
Test Score ◽  
Starch Content ◽  
Sodium Metabisulfite ◽  
Soaking Time ◽  
Average Value ◽  
Organoleptic Test ◽  
Value Of Water

Abstrak. Tujuan penelitian ini adalah untuk mengetahui karakteristik tepung labu kuning.   Parameter penelitian meliputi rendemen, kadar air, derajat keasaman (pH), kadar pati, uji organoleptik hedonik warna dan aroma. Data di analisa menggunakan ANOVA dan  excel. Hasil penelitian menunjukkan  nilai rata-rata rendemen tepung labu kuning tertinggi terdapat pada perlakuan 0 menit yaitu 11,33%, nilai rata-rata kadar air tepung labu kuning tertinggi terdapat pada perlakuan 60 menit yaitu 9,33%, nilai rata-rata derajat keasaman (pH) tertinggi terdapat pada perlakuan 0 menit yaitu 6,79,  nilai rata-rata kadar pati tertinggi terdapat pada perlakuan 40 menit yaitu 72,95%, nilai rata-rata uji organoleptik hedonik warna tertinggi terdapat pada perlakuan 60 menit yaitu 4,20 dengan skor 4 (suka), nilai rata-rata uji organoleptik hedonik aroma tertinggi terdapat pada perlakuan 0 menit yaitu 3,71 dengan skor 4 (suka).The Effect of soaking time in sodium metabisulfite solution on the characteristics of pumpkin Abstract. The purpose of this study was to determine the characteristics of pumpkin flour. The research parameters included yield, moisture content, acidity (pH), starch content, hedonic organoleptic color and aroma test. Data was analyzed using ANOVA and Excel. The results showed that the highest yield of pumpkin flour was at 0 minutes treatment which was 11.33%, the highest average value of water content of pumpkin flour was at 40 minutes treatment which was 9.33%, the average value of acidity degree (pH) is highest in 0 minute treatment, which is 6,793, the highest average value of starch is found in 40 minutes treatment which is 72.95%, the highest average hedonic organoleptic test value is found in 60 minutes treatment which is 4,20 with a score 4 (likes),  the highest average hedonic organoleptic test score was found at 0 minutes treatment which was 3.71 with a score 4 (likes).

Implementation Of Steller Application In Learning Writing Descriptive Text

2021 ◽  
Vol 10 (2) ◽  
pp. 190-204
Author(s):  
Jauhar Helmie ◽  
Vina Nurviyani ◽  
Dewi Susilawati
Keyword(s):  
Action Research ◽  
Test Score ◽  
Score Test ◽  
Tenth Grade ◽  
The Mean ◽  
Classroom Action Research

This study aims to investigate of implementation of Steller application to improve students’ writing Descriptive text and students’ responses about Steller application in writing Descriptive text. This study employed Classroom Action Research (CAR) method proposed by Kemmis and McTaggart (1998, cited in Burns, 2009). This research consisted of two cycles and each cycle consisted of four steps, they were: planning, actin, observation, and reflection. Each cycle was conducted in two meetings. To collect and analyze the data, the researcher used observation, questionnaire, and test. The result of this research shows that using Steller application in learning writing Descriptive text can improve students’ writing Descriptive text. The improvement of students’ writing Descriptive text also supported by the achievement of students’ test score. The students’ mean score of pre cycle test was 63.32, the mean score of test in cycle 1 was 73.58 and the mean score of test in cycle 2 was 79.19. it means that score test of cycle 1 was higher than pre cycle test and score test of cycle 2 was higher than mean score of test in cycle 1. The students’ responses showed that they were interested in learning writing Descriptive txt, because it was easier for them to write, it increased their motivation in learning, and Steller application game the students easy steps to write Descriptive text. Therefore it can be concluded that the implantation of Steller application improves students’ writing Descriptive text significantly at tenth grade of SMA Pasundan Cikalongkulon Cianjur.

Effect of Solution Treatment Temperature on Microstructure and Mechanical Properties of Cr20Ni32AlTi Alloy

2011 ◽  
Vol 194-196 ◽  
pp. 1225-1230
Author(s):  
Chang Chun Yang ◽  
Yong Lin Kang ◽  
Sheng Qin ◽  
Li Xin Wang
Keyword(s):  
Mechanical Properties ◽  
Solution Treatment ◽  
Carbide Precipitation ◽  
Treatment Temperature ◽  
Solution Temperature ◽  
Solution Treatment Temperature ◽  
Precipitation Behavior ◽  
Soaking Time ◽  
Average Grain Size ◽  
Optimum Solution

The effect of solution treatment from 1050°C to 1200°C, soaking time 15min on microstructure, mechanical properties and precipitation behavior of Cr20Ni32AlTi alloy was investigated. The results are as follows: with the increasing of the solution treatment temperature from 1050°C to 1200°C, the average grain size increases remarkably from 17μm to 110μm, the strength of alloy decreases while the elongation increases. The amount of carbide precipitation in the alloy decreases with the increasing of solid solution temperature. The optimum solution treatment temperature for the investigated Cr20Ni32AlTi alloy is 1150°C~1200°C.

scholarly journals PENGGUNAAN ANIMASI DENGAN MACROMEDIA FLASH UNTUK MENINGKATKAN DAYA INGAT TERHADAP MATEMATIKA PADA MATERI GEOMETRI DI KELAS X SMA NEGERI 3 BANDA ACEH

2012 ◽  
Vol 12 (2) ◽  
Author(s):  
Ruwaida Muhammad
Keyword(s):  
Action Research ◽  
Test Score ◽  
Group Learning ◽  
Score Test ◽  
Learning Activities ◽  
Post Test ◽  
Classroom Action Research ◽  
Students Attitudes ◽  
Geometry Test ◽  
Banda Aceh

This research aims to improve students’ memory in learning geometry using Macromedia Flash Animation of grade X at SMA Negeri 3 Banda Aceh. It is classroom action research consisted of 2 cycles and using the worksheets. Geometry test was given after formative test and students’ responses questionnaire in learning. At the end of the research, it shows that (1) in first cycle that the average post-test score is 76.5 and at the second cycle is 80.1;(2) The Formative score test is 73.4; (3) students attitudes and responses towards learningmathematics by using Macromedia Flash are: (a) It was easy to memorize Mathematics instructional in first cycle is 80.77% and at the second cycle is 86, 15%, (b). Students could easily understand Mathematics instructional in first cycle is 65.38% and second cycle is 80.77% and (c) Students were active in group learning activities is 92.31% in first cycle and 100% in the second cycle.

scholarly journals Regulating the rooting process of rose softwood cuttings by foliar citric and malic acid spray on stock plants

2017 ◽  
Vol 29 (2) ◽  
pp. 155-159 ◽  
Author(s):  
Noushin Ghazijahani ◽  
Ebrahim Hadavi ◽  
Chul Hwan Hwang ◽  
Byoung Ryong Jeong
Keyword(s):  
Citric Acid ◽  
Organic Acids ◽  
Malic Acid ◽  
Rosa Hybrida ◽  
The Other ◽  
Root Weight ◽  
Cut Flower ◽  
Single Node ◽  
Potential Alternative ◽  
Intermediate Concentration

AbstractWe evaluated the effects of spraying different concentrations of citric and malic acids on stock plants in the greenhouse prior to the propagation and rooting of rose (Rosa × hybrida ‘Love Letter’) cuttings. Malic and citric acids (3, 6 and 9 mM) were sprayed several times at 14-day intervals on rose plants in a commercial cut flower producing greenhouse. Single-node cuttings taken from flowering stems were rooted under misty conditions, and the rooting parameters including root count and dry root weight were measured. A distinct change was observed in rooting features in response to the applied organic acids. Malic acid significantly enhanced rooting at the intermediate concentration while retarding it at both the higher and lower concentrations. On the other hand, the effect of citric acid was best at the highest concentration applied. We conclude that in softwood cuttings taken from rose plants these organic acids can act as a potential alternative to the currently applied methods of promoting rooting.

Predicting Academic Performance: Nelson-Denny Reading Test and Measures of College Students' Study of Expository Prose

1988 ◽  
Vol 63 (2) ◽  
pp. 579-582 ◽  
Author(s):  
Ronald C. Feldt
Keyword(s):  
College Students ◽  
Retention Interval ◽  
Test Score ◽  
Score Test ◽  
Reading Test ◽  
Course Performance ◽  
Strategy Study ◽  
Comprehension Score ◽  
Expository Prose ◽  
Psychology Course

Prediction of performance in an introductory psychology course was examined for a sample of 65 freshmen college students. Students completed the Comprehension subtest of the Nelson-Denny Reading Test, then studied a 956-word passage, reported their reading strategies, and responded to 18 test questions. Predictors included Nelson-Denny Comprehension score, reading strategy, study time, retention interval, time to complete the test, and test score. Percentage of total points earned in the course for the semester was the criterion. The best set of predictors included Comprehension score, test score, and retention interval; R = .61. The text-study procedure with exemplary test questions may have utility in improving prediction of course performance.

scholarly journals Acid Resistance of Glass Ionomer Cement Restorative Materials

2020 ◽  
Vol 7 (4) ◽  
pp. 150
Author(s):  
Dinuki Perera ◽  
Sean C. H. Yu ◽  
Henry Zeng ◽  
Ian A. Meyers ◽  
Laurence J. Walsh
Keyword(s):  
Lactic Acid ◽  
Citric Acid ◽  
Glass Ionomer Cement ◽  
Acid Resistance ◽  
Class Ii ◽  
Glass Ionomer ◽  
Weight Changes ◽  
Restorative Materials ◽  
Percentage Weight ◽  
Soluble Material

In view of the need for aesthetics, restorations of teeth will typically be completed using tooth colored restorative materials. With the advent of biomimetic restorative materials, such as glass ionomer cements (GIC), much greater emphasis is now being placed on how well such materials can resist the challenge of acids that are present in foods and drinks, or gastric contents that are regurgitated. This laboratory study compared the dissolution and behavior of five GIC materials (GC Fuji® VII, GC Fuji® Bulk, GC Fuji® IX Fast, Fuji® IX Extra and GC Equia® Forte Fil) when exposed to three acids (citric acid, phosphoric acid and lactic acid), versus ultrapure deionized water, which was used as a control. Discs of each material GIC were submerged in solutions and percentage weight changes over time determined. Subsequently, the GIC materials were also placed as a part of standardized Class II sandwich restorations in bovine teeth (n = 20), and submerged in the solutions, and the extent of GIC dissolution and protection of the adjacent tooth was scored. Weight loss increased with time and with acid concentration. Overall, the most soluble material was GC Fuji® IX Extra, while GC Fuji® IX Fast and GC Fuji® Bulk were less soluble, and the least soluble material was GC Equia® Forte Fil. The most destructive solution for both the discs and for GIC restorations in teeth was 10% citric acid, while the least destructive acid was 0.1% lactic acid. The more recent GIC materials GC Fuji® Bulk and GC Equia® Forte Fil showed increased acid resistance over the older GIC materials, and this further justifies their use in open sandwich Class II restorations in more hostile environments.

Study on the effect of solution treatment soaking time on structure development of modified FeNiMn steels

2020 ◽  
Author(s):  
Faried Miftahur Ridlo ◽  
Permana Andi Paristiawan ◽  
Dedi Pria Utama ◽  
Fatayalkadri Citrawati
Keyword(s):  
Solution Treatment ◽  
Structure Development ◽  
Soaking Time

scholarly journals PRE-STORAGE HYDRATING SOLUTION EFFECTS ON FLOWER LIFE OF ROSES AFTER DRY STORAGE

HortScience ◽  
1992 ◽  
Vol 27 (6) ◽  
pp. 616d-616
Author(s):  
Dominic Durkin
Keyword(s):  
Citric Acid ◽  
Sodium Hypochlorite ◽  
Aluminum Sulfate ◽  
Rosa Hybrida ◽  
Tween 20 ◽  
Potassium Salts ◽  
Dry Storage ◽  
And Storage ◽  
Microbial Agent

Freshly harvested Rosa hybrida, `Kardinal' flowers were used to evaluate vase performance after hydration and storage at 37°F. Flowers were placed in one of six solutions for 24 hours and in dry storage for 3 additional days. After storage, half of the roses were cut before placement in vase solution containing 1% dextrose and potassium salts but without an anti-microbial agent. Roses hydrated in aluminum sulfate had the shortest life followed by roses hydrated in CHRYSAL RVB. Flowers hydrated in CHRYSAL RVB and cut lasted as well as roses hydrated in HYDRAFLOR-100, 60 ppm sodium hypochlorite (naocl), citric acid, or citric acid with Tween 20 for one hour followed by 60 ppm maocl solution. Roses stored in naocl solution performed as well without, as with, cutting before placement in the vase solution. Results will be discussed in terms of microbe and particulate blockage of hydration pathways.

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