bluuebunny/crossref_metadata_2025_split huggingface dataset:
Effect of coconut water and banana hump extract on the growth of binahong (Anredera cordifolia (Ten.) Steenis) accessions from lowland
Authors: Hasanah Y , Mawarni L , Hanum C , Nurhaida  
Published: November 2020

Abstract
The application of natural plant growth regulators (PGR) influences the growth of binahong (Anredera cordifolia (Ten.) Steenis). The objective of the current research is to evaluate the growth component of lowland binahong accessions due to the application of natural PGR of coconut water and banana hump extract. The research used factorial randomized block design with 2 factors and 3 replications. The first factor was different accessions of binahong from lowlands (Marelan; Ampera Tmur; Helvetia) in the city of Medan, North Sumatera, Indonesia. The second factor was natural PGR, in which we conducted experiments without the application of PGR; 40% coconut water application, banana hump extract 40%; coconut water 40% + banana hump extract 40%. The results showed that the accessions from Ampera Timur had root dry weight that were higher than the other accessions. The treatment of 40% coconut water + banana hump extract 40% increased plant length, and root dry-weight. Interaction of Ampera Timur binahong accession and 40% coconut water + banana hump extract 40% increased shoot dry-weight and root dry-weight.
Mechanical properties investigation of green composite from ramie (Boehmeria nivea (L.) Gaud) and epoxy
Authors: Ismadi  , Vitasasti S , Nurindah  , Kusumah S S 
Published: November 2020

Abstract
In the last decade, the requirement of friendly environment materials has increased significantly. Green composite material, such as natural fiber reinforced epoxy composite, has been developed to provide an environmentally friendly product. Ramie (Boehmeria nivea (L.) Gaud) fiber and bio-epoxy are potential materials to produce an excellent environmentally friendly composite. The physical and mechanical properties of the composite were evaluated. Each composite material has three different layers of ramie fiber orientation, i.e., 0, 45, and 90°. Ramie fiber contents were varied by 5, 7.5, and 10% w/w of composite weight. The content variations of epoxy matrix hardener were 25 and 50% w/w of matrix weight. The replication of each sample was three times. The making of the ramie fiber-epoxy lamina composite was started with mixing the epoxy with a hardener, followed by pouring the matrix on the mold and coating the layers of fibers layer by layer until a composite was obtained according to the specified layer variations. The sample was poured into mold-press for 24 hours. Then, samples were removed from the mold and put in the oven at 60°C for 24 hours. For conditioning, the samples were placed in an open space at room temperature (27°C) for seven days. The dimension of the samples was 150 mm × 100 mm × 3 mm. For the composite materials, tensile testing and flexural testing standard were ASTM D 638 and ASTM D 790, respectively. The research results showed that the composite with 25 % of hardener (w/w matrix weight) and 5 % of ramie fiber (w/w composite weight) had the lowest thickness swelling (0.17%). However, the highest tensile strength (45.8 MPa) was obtained by the composite with 25 % of hardener (w/w matrix weight) and 10 % of ramie fiber (w/w composite weight). Meanwhile, the flexural strength of the composites with 50 % of hardener, either with 5 or 7.5 % of ramie fiber, was higher than the other composites. Composite materials, which contain 10% of ramie fiber (w/w composite weight) and 25% of hardener (w/w matrix weight), had the best mechanical properties.
Estimation of biodiesel production from used cooking oil of university cafetaria to support sustainable electricity in Universitas Pertamina
Authors: Rahman A , Suryawan I W K , Sarwono A , Zahra N L , Faruqi Z M 
Published: November 2020

Abstract
The objective of this study was to estimate the amount of biodiesel production obtained from the used cooking oil from the university canteen. This research is a literature review supported by the existing condition data of canteen activity at Universitas Pertamina, especially from the amount of used cooking oil produced. Based on the survey questionnaire, the university canteen produced, on average, 36 L/day of used cooking oil. The amount of biodiesel produced was 30.2 L/days, with 83.9% of yield. Using a diesel testing machine, biodiesel with B30 type (30% biodiesel and 70% diesel in volume) held the potential to generate electricity of 3,014 kWh/month. This value is expected to contribute to 12% of lighting in the Rectorate Building used for administration and official activities. Savings of IDR 3,348,857 can be achieved every month by substituting electricity sources into biodiesel. Furthermore, by considering biomass as sustainable renewable energy resources, a reduction in carbon emissions can be valued by 2.2 MTCO2/month.
Characteristics of bioplastic made from modified cassava starch with addition of polyvinyl alcohol
Authors: Syamani F A , Kusumaningrum W B , Akbar F , Ismadi  , Widyaningrum B A , Pramasari D A 
Published: November 2020

Abstract
Food packaging plastic from petroleum-based sources can be a problem to the environment due to its non-biodegradability. The development of bioplastic from modified cassava-starch will be an alternative to overcome that problem. Since starch-based bioplastic usually has low mechanical strength and damage if exposed to water, it’s modification with polyvinyl alcohol (PVA) and citric acid is necessary. Bioplastics are made by heating a solution of modified cassava starch at 75 °C for 1 hour. After starch solution was gelatinized, glycerol (5% based on starch weight) was added, and then PVA solution (25, 50, 100% based on starch weight) was inserted gradually. While stirring was continued, citric acid (5% based on starch weight) was added into the solution. The bioplastic solution was then poured into a 20 × 20 cm acrylic sheet and cooled at room temperature for 3 days, so that the bioplastic sheet was ready for mechanical strength test (ASTM D 882-75b Tensile Properties of Thin Plastic Sheeting) and for thermal properties test with Thermo Gravimetric Analyzer. The results suggested that the addition of 25% polyvinyl alcohol (PVA) into bioplastic made from modified cassava starch produced bioplastic with higher tensile strength compare to that without PVA addition. On the other hand, the addition of 100% PVA could slightly increase bioplastic elongation. The decomposition temperature of bioplastic made from modified cassava starch with 50% PVA was higher than that of the bioplastic without PVA addition, indicated that bioplastic with 50% PVA was more thermally stable.
Antioxidant activity of isolated phytoconstituents from the leaves of Hyptis suaveolens (L.) Poit
Authors: Aye S S , Win K C , Sin K T 
Published: November 2020

Abstract

Hyptis suaveolens (L.) Poit (Family Lamiaceae) is a medicinal plant used traditionally for antifertility, anti-inflammatory and antiplasmodial properties. Therefore, this study was designed to isolate bioactive compounds and to evaluate the antioxidant activity of isolated compounds from H. suaveolens by silica gel Column Chromatographic separation method and gallic acid (10 mg) was mainly isolated. Among them, the isolated compound was structurally characterized by physicochemical determination and spectroscopic techniques such as UV, FTIR and 1H-NMR by comparing with the reported data. Moreover, the essential oil was extracted from the fresh leaves of H. suaveolens by the hydro-distillation method and analyzed by GC-MS. It was found that carophyllene, sabinene, and naphthalene were predominant compounds in the essential oil of H. suaveolens. The antioxidant activity of isolated compounds and essential oil was determined by DPPH free radical scavenging assay method. The results suggest that the major compounds gallic acid from H. suaveolens possess effective antioxidant activity.
The enhancement of added value of agarwood by diversification product
Authors: Gusmailina  , Sumadiwangsa S 
Published: November 2020

Abstract
Non-timber forest products are one group of commodity forest products that need to be optimally used because they are generally high value and can be utilized directly and cultivated by communities around the forest. One of the commodities is agarwood, in which the value varies greatly. Its price per kg ranges from 10 thousand to 10 million. The price of low-quality aloes, or often called kemedangan, also varies greatly from 10 thousand to several million rupiahs for each kg. Until now, agarwood is only obtained from natural products, in which its potential is depleting and has been included in Appendix II Cites IX in Florida. Kemedangan has the opportunity to increase its utilization, such as the isolation of chemical components by distillation (essential oil) and extraction using organic solvents (extracts) or diversification of products such as the manufacture of the synthetic aloes (black magic wood / BMW), incense, makmul, and hio. This paper presents, in general, the profile of Indonesia’s agarwood and the prospect of increasing added value through diversification of products, such as efficient refining, extraction, and manufacturing of finished products.
Screening of antibiofilm activity and toxicity assay of methylotrophic bacteria compounds isolated from the human mouth
Authors: Raissa G , Waturangi D E 
Published: November 2020

Abstract
Biofilm is a community consisting of one or more species of bacteria attached to a surface using a matrix. Biofilms can cause health problems in humans, such as dental plaque. Biofilm is one form of self-defense of bacteria against antibiotics, so biofilm often has implications for the rise in resistance of bacteria. Therefore, antibiofilm compounds can be used to increase the sensitivity of bacteria to the antimicrobial agent. The purpose of this study is to determine the antibiofilm activity and the potential toxicity of the methylotrophic bacteria compound isolated from the human mouth. Based on the results of the study, 21 out of 37 isolates of methylotrophic bacteria had antibiofilm activity using two different supernatant concentrations (5% and 10%). The isolate of M28L2 showed the highest anti-biofilm inhibition activity: 47.64% against EHEC and 50.97% against Pseudomonas aeruginosa ATCC 27583. Meanwhile, M30G1 isolate showed the highest anti-biofilm destruction activity: 44.062% against EHEC and 39.17% against ETEC. Toxicity test was performed on five isolates that had the highest antibiofilm activity using a lethal dose test. Based on these test results, five isolates had LC50 values greater than 1000μg/mL, indicating that the compound was not toxic. Subsequently, PCR amplification for the DNA sequencing stage was performed on one isolate, M28L2. Based on the sequencing results, M28L2 had a 99% similarity to Pseudomonas stutzeri.
Radial variation of wood properties of eight years-old fast-growing teak (Tectona grandis - Platinum teak wood)
Authors: Adi D S , Himmi S K , Sudarmanto  , Amin Y , Darmawan T , Dwianto W 
Published: November 2020

Abstract
The objective of this research was to determine the wood basic properties of eight years-old fast-growing teakwood (Tectona grandis – Platinum teak wood), in the radial direction of the stem. The anatomical features of the examined teak wood showed semi-ring porous and in general, they had a similarity to those of the conventional teak wood. The ray cell proportion was increased along with the increased distance from the pith area. The size of vessel cell tended to change from pith to the outer part. The radial (R) and tangential (T) shrinkage had improvement compared to those of five years-old Platinum teak wood. The R and T shrinkages were 2.89% and 6.2%, respectively. The present results suggested that wood properties of eight years-old Platinum teak wood is more stable than those of five years-old as reported in the previous study. The compression strength was also increased during the increase of growth age. The values of compression perpendicular and parallel to the grain were 76.74 kg/cm2 and 367.9 kg/cm2, respectively. The increasing of the radial properties indicated that eight years-old Platinum teak wood was still in juvenile stage.
The presence of potentially invasive alien plant species in Laiwangi-Wanggameti National Park and vicinity, Sumba, Indonesia
Authors: Damayanto I P G P , Ervianti D 
Published: November 2020

AbstractThe study was aimed at providing data on the presence of potentially invasive alien plant species in Laiwangi-Wanggameti National Park and vicinity. The study was conducted using the taxonomic data collection methods, which took place in Laiwangi-Wanggameti National Park and vicinity, East Sumba, Indonesia. The plant material was collected for herbarium specimens and shipped to Herbarium Bogoriense for processing and identification. One hundred and four species of plants were collected in Laiwangi-Wanggameti National Park and vicinity. Of those collections, three invasive alien plant species were identified in the national park:Austroeupatorium inulifolium, Melastoma malabathricum, andThespesia lampas.Another one wasJatropha gossypiifoliafound outside the national park.
Carbon dioxide absorption and physiological characteristics of selected tropical lowland tree species for revegetation
Authors: Davis L O M M , Hidayati N 
Published: November 2020

Abstract
Biological diversity can make a significant contribution to reducing greenhouse gases in the atmosphere. Trees form an essential part of the functioning of the terrestrial biosphere, especially in the carbon cycle. Yet, tree photosynthesis is far less studied than crop photosynthesis. This research aims to assess CO2 absorption-related physiological characteristics of selected tropical lowland trees that are curated in Cibinong Science Center-Botanical Garden (CSC-BG) Indonesia for revegetation prospecting. CO2 absorption, stomatal conductance, and transpiration were measured using an infrared gas analyzer photosynthesis system. Meanwhile, leaf chlorophyll content was estimated using a SPAD chlorophyll-meter. CO2 absorption rate ranged from 3.42 to 20 μmol m−2 s−1. The highest rate was observed in Teijsmanniodendron bogoriense followed by Tectona grandis (19.67 μmol m−2 s−1). The rate of transpiration ranged from 4.7 μmol m−2 s−1 to 7.82 μmol m−2 s−1. Diospyros discolor was the highest, followed by T. grandis (7.65 μmol m−2 s−1). CO2 absorption and rate of transpiration were positively correlated to stomatal conductance. In contrast, the CO2 absorption and chlorophyll content were very weakly correlated. The stomatal conductance ranged from 0.14 to 0.54 μmol m−2 s−1, with that of T. grandis was the highest, followed by Erythrina crista-galli (0.53 μmol m−2 s−1), whereas the chlorophyll content ranged from 31 up to 78.43 SPAD.
High corolla color variation of Hoya coronaria Blume in Belitung Island: Potential use and conservation
Authors: Rahayu S , Fakhurrozi Y 
Published: November 2020

Abstract
Genus Hoya (Apocynaceae: Asclepiadadoideae) has become popular as an ornamental plant due to the beauty of its shiny, waxy, star-shaped corolla with various color. Normally, each species has specific corolla and corona color. However, some species have variations in corolla color, for example, Hoya coronaria Blume. Normally, H. coronaria has white with pinkish dotted corolla color, rarely with red corolla color. H. coronaria is distributed from South Thailand, Malay Peninsula, Java, Borneo, and Sumatra as well as in Belitung Island. We surveyed the population and corolla color of H. coronaria in Belitung Island in June 2019. The RHS color chart was used to determine the color. We found eight accessions with different corolla and corona color variation of H coronaria in Belitung Island, ranging from white, cream, pink, peach, deep pink, yellow, red, and deep red. This variation was very high, and the population of Hoya coronaria was well developed in the heath forest habitat of Belitung Island. Further utilization was suggested as a domesticated ornamental plant with proper characterization to support further breeding program. H coronaria was also a component of the heath forest habitat of Belitung Island, which is very fragile. Thus the ex-situ and in situ conservation were suggested for sustainability.
The diversity of tree species at the buffer zone of Karst Citatah, West Java, Indonesia
Authors: Hidayat M Y , Suryanti T 
Published: November 2020

Abstract
Karst area is an ecosystem type that has an important function as water conservation. It is essential to know the composition and structure of the trees species of the karst area. This current study aims to determine the diversity of species and their potential in the buffer zone of Karst Citatah, West Java, Indonesia. The data on tree species composition were collected by using a plot employed on a community forest land, which was spread in three villages. Vegetation analysis was conducted by a census (100%) in all selected sampling areas. The importance value index (IVI) showed that sengon species (Paraserianthes falcataria) were dominant, both rejuvenation level (79.23) and tree-level (165.71). The diversity index of rejuvenation level was very stable as it had a range of H’ > 2 compared to the tree level that had a range of H’ value 1-2. The dominance index was only seen at the tree level, i.e., sengon (Paraserianthes falcataria) species, where the C value was one. At the level of rejuvenation, there was no visibility of the domination of one species to other species. The similarity index at rejuvenation level and tree-level were quite high (> 55%). The regeneration at the rejuvenation level grows well until it reached the tree level. The suggested pattern of management that is suitable according to the vegetation structure in the research area is a public forest with a mixed garden system.
Subpixel precision in registration of multimodal datasets
Authors: Lebl Matej , Blazek Jan , Striova Jana , Fontana Raffaella , Zitova Barbara 
Published: November 2020

Abstract
The motivation for our research is the huge demand for registration of multimodal datasets in restorers practice. With an increasing number of various screening modalities, each analysis built on the acquired dataset starts with the registration of images acquired from different scanners and with varying levels of mutual correspondence. There is currently no well-suited state of the art method for this task. There are many existing approaches, i.e. based on control points or mutual information, but they do not provide satisfying (subpixel) precision, thus the registration is very often realized manually in Adobe Photoshop or any similar tool. Another popular option is to use scanners able to produce registered datasets by design. During the last 10 years, datasets from these devices have extended available analytical techniques the most.
In our research, we focus on solving the mentioned registration task. In [1] we concluded that the work with misregistered modalities is possible but limited. Now we present results of our experiments challenging these limits and conditions under which we can precisely register data from different modalities. The achieved results are promising and allow usage of more complex artificial neural networks (ANN) for dataset analysis e.g. [2]. We describe the construction of registration layers for estimation of shift, rotation and scale and a useful strategy and parametrization for ANN optimizer.
Marina Militare-Amerigo Vespucci Implementation Of The Digital Survey And Database For The Management Of Italian Naval Excellence
Authors: Bertocci Stefano , La Placa Silvia , Ricciarini Marco 
Published: November 2020

Abstract
The survey project of the Amerigo Vespucci is part of a research line that DiDA, Department of Architecture of the University of Florence, developed through an experience of collaboration and partnership with the Department of Defense. For more than two years, the Department has been involved in the study of the Cascine park, in Florence, analyzing the architectures of historical value, with a particular focus on the Scuola di Guerra Aerea. The documentation of the architectural heritage received in recent years an innovative technological boost, which led to the development of new modern methodologies of investigation. It is possible to apply integrated survey methods not only to immovable assets such as historical buildings, which abounds in our country, but also to movable ones, included vessels. By now, the processes of data registration and graphical restitution of the survey, both laser-scanner and photogrammetric, are functioning and consolidated, and can therefore be applied in research projects, if the appropriate considerations on the specific asset typology of the subject of study are taken. The application of specific instruments in support of the survey and architectonic representation enables us to achieve increasingly accurate results, engaging multiple aspects of the structure under study. The project investigating the Nave Scuola Amerigo Vespucci allows to expand the current knowledge on the sailboat in order to provide, through survey methods and architectonic representation, the documentation necessary to conduct future renovations and wood restorations. The aim of the present research is to create a digital database that, similarly to those used for buildings of historical value, would facilitate the management of this excellent asset of the Italian Navy.
Methodologies for dating wooden artefacts
Authors: Bernabei Mauro 
Published: November 2020

Abstract
In recent years, constant progress has been made with regard to wood-dating techniques. In Italy, both the number and length of dendrochronological reference chronologies have increased so that by now the last 10,000 years are almost completely covered. This indispensable dating method has provided new ways for studying archaeological and prehistoric finds. New technologies have remarkably improved the sampling techniques, which today, in most cases, are very effective and non-evasive. Modern software now allows easy data management and statistical analyses. Apart from dendrochronology, the diffusion of isotope analysis has also had great impetus. With regard to radiocarbon dating, the calibration curve has been enriched by new data, and several peaks of cosmic emissions have been identified that, in future, can be instrumental in improving dating precision. Apart from radiocarbon, the isotope analyses of O, H and Sr, especially if linked with dendrochronology, allow to refine the information regarding dating and, in many cases, permits to determine the timber’s provenance and even to define precisely the environmental conditions for the growth of the tree, from which the wood has been obtained. Today, finally, we can assert that all wood can be dated. Only the precision of dating still varies but constant progress is being made in that regard, too.
Microbial contamination of libraries and archives: risk assessment and contamination control
Authors: Bosco F , Demichela M , Barresi A A , Fissore D 
Published: November 2020

Abstract
Freezing of the paper material is a way to control the growth of microorganisms and the possibility of “acute” biodeterioration and illness, after accidental events, e.g. flooding. But as the paper-born microorganisms can survive after lyophilisation, they must be controlled also after the drying process. The decision-making about the adoption of prevention and protection measures for the exposed operators’ safety, among which the possibility to control the biodeteriogenic and toxigenic microflora growth by the application of Thymus vulgaris oil, was supported not only by the experimental results but also through a dedicated risk assessment procedure.