Mohammad Affan | Universitas Gadjah Mada (Yogyakarta) (original) (raw)

Papers by Mohammad Affan

International Journal on Advanced Science, Engineering and Information Technology, 2020

High-quality fruits can be produced by controlling the environmental factors, i.e. temperature, r... more High-quality fruits can be produced by controlling the environmental factors, i.e. temperature, relative humidity, carbon dioxide, and light intensity. The tomato (Solanum lycopersicum) variety 'Rinka 409', was grown hydroponically with a high-wire system in high technology greenhouse, Ehime University, Japan. The water stress treatment using visual monitoring system was used to produce the high soluble solids tomato fruits. Moreover, a high lycopene content of tomato can be produced by controlling the storage condition. Non-destructive measurement has been known to provide a fast and accurate quality measurement of fruits and vegetables. The objectives of this study were to develop a precise position for the non-destructive measurement of the lycopene content in high soluble solids stored tomato using Vis/NIR spectroscopy and evaluate its performance. In this study, the high soluble solids of tomato fruits were grown under water stress treatment and stored after harvesting at 25°C in a cool incubator for 7 days. The tomato spectra were measured using Vis/NIR spectroscopy with the wavelength 500-1010 nm. The estimation of the lycopene content was based on the statistical model using multivariate analysis. From this study, it is concluded that the measurement of lycopene content in high soluble solids of tomato fruits after storage by using the top part of the tomato, was better than if it is compared to the side part. It was best determined using PLS analysis with Visible/Near-infrared Spectroscopy non-destructively, with the R 0.98 and RMSE 0.80.

Advances in biological sciences research, 2023

International Journal of Biomaterials

Oil palm empty fruit bunches (OPEFB) are lignocellulosic materials that are a by-product of the p... more Oil palm empty fruit bunches (OPEFB) are lignocellulosic materials that are a by-product of the palm oil industry, which have less use and utilization is still limited. OPEFB’s high cellulose content could potentially develop into various bioproducts, especially biomaterials. The thermochemical delignification process can obtain high-yieldalpha-cellulose. The cellulose extraction process can be done by combining the bleaching process under acidic conditions and alkaline delignification to obtain high-purity cellulose. The bleaching conditions vary in the concentration of NaClO2, the length of bleaching, the temperature, and the number of stages. The research obtains high α-cellulose by optimizing bleaching conditions under acidic conditions in cellulose’s OPEFB extraction with variability on NaClO2 concentration and bleaching time using response surface methodology (RSM). The bleaching process was implemented at an early stage with a concentration of 3% NaClO2 and a bleaching time o...

International Journal of Agricultural Technology, 2013

This study was aimed to observe hydroponics plants and food production in a controlled environmen... more This study was aimed to observe hydroponics plants and food production in a controlled environment that was developed using a controlled room equipped with an air conditioner, chiller, humidifier and artificial lighting. Air temperature, water temperature, relative humidity, pH of nutrient solution, electrical conductivity and light intensity inside the controlled environment were monitored daily using several sensors with and without plants grown in hydroponics system. Melon (Cucumis melo, cv Sakata) was cultivated and grown hydroponically. The effect of environment on plant growth was evaluated. Based on the results, air temperature inside controlled environment was between 23-26 o C and relative humidity was 60-80%. These values of air temperature and relative humidity inside controlled environment were suitable for growing plant material. Furthermore, environmental conditions (air temperature, relative humidity, water nutrition temperature, pH and dissolved oxygen in liquid nutr...

International Journal of Agricultural Technology, 2010

In plant production, high temperature stress frequently causes physiological disorders and yield ... more In plant production, high temperature stress frequently causes physiological disorders and yield depression, and information about physiological functions of intact roots is essential. However, there have been difficulties in measurement of physiological functions of intact roots in the plant production systems. Effects of high solution temperature on water and nutrients uptake by roots of tomato plants cultivated in the NFT system were analyzed. Dynamic and simultaneous evaluation of water and nutrients uptake by roots was developed in the NFT system. Rates of water and nutrients uptake by roots were evaluated simultaneously on the basis of time courses analyses of water balance and nutrients balance in the systems, and these also enabled estimation of nutrients concentration in root xylem sap. Rates of water and nutrients uptake by roots varied depending on solar radiation. The short-term effect of high solution temperature activated water and nutrients uptake through decrease in ...

Journal of Physics: Conference Series, 2019

Cocoa is one of the potential agricultural resources in Indonesia but still lacks the attention o... more Cocoa is one of the potential agricultural resources in Indonesia but still lacks the attention of stakeholders to get the best economic value. It is important to encourage the cocoa business industry to capture opportunities in the cocoa processing business in the future. Taman Teknologi Pertanian in Nglanggeran is an SME that is also a business incubator that has produced various chocolate products. The design used in this research was explanatory research with the process of data collection through interviews, observation, and questionnaires. This analysis consists of two steps of weighting and prioritizing. The weighted score of the IFE and EFE matrix is (2.5671; 3.1132). SWOT diagram is used to determine the current position of the company which is on the second quadrant (1.1895;-0.0460) which refers to the S-T strategy. The chosen strategy triggered to do diversification strategy as doing product innovation gradually according to consumer needs. Concentric diversification for ...

Agriculture and Agricultural Science Procedia, 2015

Moderate water stress tomato cultivated hydroponically in the greenhouse contains high lycopene a... more Moderate water stress tomato cultivated hydroponically in the greenhouse contains high lycopene and very sensitive to storage temperatures. This study aimed to observe the effect of storage temperatures on the lycopene content and color quality parameters of tomato (both moderate water stress and no water stress tomato). The lycopene content of water stress tomato increased with the temperatures higher than 10 °C while no water stress tomato relatively stable or increased slightly. The lightness (L*) value of water stress and no water stress tomato decreased during storage in 10, 15, 25 and 30 °C temperatures. The redness (a*), yellowness (b*), a*/b*, hue (h), and chroma (C*) remained stable after 4 days storage in those temperatures. Storage with temperatures above 15 °C increased the color parameters value of both water stress and no water stress tomato. Moderate water stress treatment increased the redness color and harvesting tomato in ripening stage will only shows lightness (L*) major change during storage.

IOP Conference Series: Materials Science and Engineering, 2018

This research objective is to analyze the storage temperatures that optimize lycopene of tomato (... more This research objective is to analyze the storage temperatures that optimize lycopene of tomato (Lycopersiconesculentum, cv.Taiankitijitsu) from moderate water stress irrigation and to compare it with normal irrigated tomato in hydroponic greenhouse system. Harvested tomatoes were stored in various temperatures (10, 15, 25 and 30 °C) until mature stage and lycopene content was observed with destructive method using spectrophotometer. Optimum temperature was analyzed by Minitab 15 Statistical Software using surface response methodology. After 16 days of storage, lycopene of water stress tomato attained 8,152 mg/100 g (10 °C), 11,636 mg/100 g (15 °C), 11,747 mg/100 g (25 °C), and 11,947 mg/100 g (30 °C) respectively. Storaging tomato at 10 °C remained the lycopene of water stress tomato in stable trend. Temperatures above 15°C increased lycopene of both water stress and normal irrigated tomato. Lycopene of normal irrigated tomato increased only for first 8 days with temperature 15 °C (slightly increase), 25 °C, and 30 °C (highest lycopene value). After 8 days of storage, the trends tend to drop. Analysis of multivariate multiple regressions showed low R 2 value of lycopene during storage. Optimization using Minitab 15 Statistical Software showed temperature of 24.52°C with 11 days storage and might reached 10.71 mg/100g.

PLANTA TROPIKA: Jurnal Agrosains (Journal of Agro Science), 2021

Strawberries are often transported and sold without temperature control, which causes huge losses... more Strawberries are often transported and sold without temperature control, which causes huge losses due to rapid decay and quality deterioration. In this study, the effectiveness of edible coatings using alginate and enriched with an antibacterial agent (cinnamaldehyde from Cinnamomum burmannii essential oil), to maintain the quality and shelf life of strawberry was examined. Alginate coatings were prepared by dissolving 2%(w/v) sodium alginate, 0.5%(v/v) glycerol, 0.1%(w/v) CMC, and 0.5% (w/v) stearic acid, while antimicrobial agent was prepared by homogenizing 0.5%(v/v) cinnamon essential oil and 0.2%(v/v) Tween 20. Physicochemical and biochemical attributes [weight loss, firmness, color (L*, a*, b*), soluble solids content, vitamin C loss, acidity level, odor, total yeast and molds, and total mesophilic microorganisms were analyzed during storage under tropical conditions at 27±2°C. Statistical analysis was performed using ANOVA followed by a Tukey test. The inhibitory activity of ...

Engineering in Agriculture, Environment and Food, 2014

This research presents performance evaluation of moss rooftop greening prototype in a confined sp... more This research presents performance evaluation of moss rooftop greening prototype in a confined space using an experimental chamber. The chamber was utilized to simulate performance of prototype in reducing temperature inside a building. Two simulated environments were set as low and hightemperature treatment. Moss plant (Sphagnum sp.) was used. Performance was evaluated by using Lab color, photosynthesis and CO 2 absorption rate. The results concluded that prototype could reduce temperature inside confined space from 1.5 to 2.9 C. L and b parameters were applicable to detect the color patterns. The high-temperature had no effect on while low-temperature treatment decreased photosynthetic and CO 2 absorption rate. These results concluded that the prototype could be applied as a rooftop greening material in tropical environment of Yogyakarta, Indonesia.

IOP Conference Series: Earth and Environmental Science

A significant urban population increases with the rising demand for higher food quality and secur... more A significant urban population increases with the rising demand for higher food quality and security. Adapting the current food chain system and our eating patterns are needed to make them more sustainable. Plant factories are one approach for making the food chain system more sustainable. However, plant factory systems typically require significant initial capital expenditure. As a result, a mini plant factory, which is more affordable and flexible, will be appropriate in urban areas. The objective of this study was to design, build, and evaluate a mini plant factory system for horticultural crop production. The mini plant factory system comprises a mini cultivation room with three growing shelves equipped with a microclimate sensor, nutrient dosing system, artificial growth light, and ventilation system. Sensors and actuators are integrated with the Agrieye Cloud system for monitoring and control and can autonomously execute data retrieval and actuation. Mini Plant Factory operate...

2019 5th International Conference on Science and Technology (ICST), 2019

Most of red chili quality is manually analysed. It often gives subjective and inconsistent result... more Most of red chili quality is manually analysed. It often gives subjective and inconsistent result. This research’s aim is to design an accurate image capturing box for red chili analysis which is suitable for users. An experiment was conducted to determine the instrument specification on background colour; lighting condition; and smartphone camera setting. Two types of smartphone camera were examined. Colour control patches was used as Red Green Blue (RGB) standard colour. RGB values (1 to 255) were divided into 5 ranges, which were 1-50, 51-101, 102-152, 153-203, and 204-255. Each range was scored 1 to 5 depending on the ideal value for each colour. Based on the scoring system, the closer an RGB value to the score of 5, the better the instrument. Users’ needs were also identified through brainstorming with chili sorting workers to determine the instrument’s specification. The results of the experiment and brainstorming were used to arrange the instrument’s concept. This research managed to set specifications comprising black background, two led bars positioned at the top-edge, camera setting at ISO 100, and auto shutter speed. This combination achieved an average score of 4.6. To meet the users’ needs of portability, price affordability, easiness of use, and comfortability, 2 models of image capturing box were made. These were folding and sections model.

Proceedings of the 2nd International Conference on Smart and Innovative Agriculture (ICoSIA 2021)

The quality parameters were investigated in strawberry fruit using soilless cultivation under the... more The quality parameters were investigated in strawberry fruit using soilless cultivation under the tropical greenhouse production. The soilless strawberry production using substrate and NFT system was compared with soil cultivation and they were cultivated using standard nutrient solution with an electrical conductivity 2 mS cm-1 for all. Objectives of the studies were to investigate characterize the quality of soilless cultivated strawberries under tropical greenhouse and to identify the comparison between the color skin of strawberry that measurements using chromameter and digital image processing. The quality parameters, consist of fresh weight, size, texture of skin, soluble solids, total acidity, ascorbic acid, and anthocyanin values, were determined destructively using standard method. The color skin of strawberry fruit were determined non-destructively using the chromameter and digital image processing, then result between these measurement values were compared statistically. Based on results, the strawberry fruit grown in soilless cultivation systems under tropical greenhouse had bigger and better fresh weight, size and crop yield (in NFT soilless cultivation only) compared to soil cultivation in physical quality, and nutrition quality had higher values of soluble solids, ascorbic acid, L* and a*, while total acidity and anthocyanin fruit values were higher in soil cultivation. On the other hand, the comparisons of values the color skin of strawberry that measured between chromameter with digital image processing was relatively different, through different color specification and conversion method with moderate accuracy. Further research could be considered to improve this image processing method with low cost of the instrument and the ease of use.

International Journal of Agricultural Technology, 2014

The quality of fresh and fresh-cut melon fruit (Cucumis melo, L) var. Gama Melon Basket (non-comm... more The quality of fresh and fresh-cut melon fruit (Cucumis melo, L) var. Gama Melon Basket (non-commercial netted melon) and Glamour Sakata (commercial netted melon) was evaluated based on the effects of tropical conditions of Indonesia that are characterized by high temperature and relative humidity. Whole melons were stored after harvest for 1 day, 7 days and 10 days in a non-controlled tropical environment; fresh-cut pieces of melon were packaged with a plastic cling wrap or in polyethylene and then evaluated from the first day after cutting under different environmental conditions (non-controlled environment and controlled environment at 14-15 o C). Melons were evaluated on their quality of the physical characteristics (fresh weight, color of flesh melon, texture of skin and flesh melon fruit) and nutritional characteristic (soluble solid content, water content, total carotenoid, titratable acidity and ascorbic acid). Based on the evaluation results of the whole quality, the two cu...

Agroindustrial Journal

Fresh cut flower has characteristis such as perishable and short shelf life. Pulse treatment is a... more Fresh cut flower has characteristis such as perishable and short shelf life. Pulse treatment is akind of method that can prolong fresh cut flower’s shelf life. Pulse treatment is a postharvesthandling which is done by soaking the stem of flower into a solution containing nutrients(glucose and sucrose) and germicides. The objectives of this reseacrh were to determine the bestalternatives of pulse treatment and determine shelf life of fresh cut rose flower of eachtreatment. There were 6 alternatives, namely P 1 (5% sucrose+20 mg/l AgNO 3 ), P 2 (150 mg/lAgNO 3 ), P 3 (1,2% sucrose+0,2 mM STS), P 4 (5% sucrose+20 mg/l AgNO 3 +320 mg/l citricacid), P 5 (1,2% sucrose+ 0,2 mM STS+ warm water (40 0 C)), P 6 (5% sucrose+20 mg/lAgNO 3 +320 mg/l citric acid+warm water (40 0 C)). The parameters used for determining shelflife are color of petals (lightness and redness), moisture content, and texture of stem. As results,shelf life of P1 was 8 days, P2 was 6 days, P3 was 4 days, P4 was 6 days, P5...

Jurnal Pengabdian dan Pengembangan Masyarakat

In line with the government's program to strengthen tourism destinations in Indonesia, many t... more In line with the government's program to strengthen tourism destinations in Indonesia, many tourism villages have been initiated, including Kulon Progo Regency. The needs of people to relieve fatigue by visiting tourist attractions, encourage the growth of tourist villages. The existence of a tourism village encourages the growth of typical souvenirs of the tourist village. Jatirejo is one of the villages in the Lendah sub-district, Kulon Progo, which is located at 7o93'22" south latitude and between 110o23'08" east longitude. Jatirejo has an area of 635.89 ha or 17.87% of the area of Lendah District (3,559.19 ha). The location of Jatirejo is close to access pathway of NYIA Airport, so it has great potential to become one of the tourism destinations. It is necessary to develop a tourist village by recognizing the agroindustry product potency owned by Jatirejo. This Community Service aimed to recognize and to document the agroindustry product potency of villages...

Jurnal Agroindustri

Strawberry (Fragaria sp cv Holibert) is a non-climakteric fruit which have high value with high ... more Strawberry (Fragaria sp cv Holibert) is a non-climakteric fruit which have high value with high consumer demand. Tropical environment conditions can deteriorate and decrease quality of their fruit. Objective of the research were to identify quality characteristics of fresh strawberry that storages in tropical environment with and without temperature controlled.Strawberry fruit were sampled from mountain area in Ketep, Magelang, Central Java. Several quality parameter were measured include physical parameter (fresh weight, weight loss, skin texture and color) and chemical parameter (water content, soluble solid content, vitamin C and titratable acidity). Then, fresh weight of strawberry were compared with IQS 8026-2014 using control chart. Storage conditions were tropical condition without controlled temperature and controlled temperature at 4 oC and 10 oC. Result shown that chemical parameters of fresh strawberry were optimum at 4 oC storage condition for water content and solubl...

Journal of Agricultural Meteorology, 2005