bluuebunny/crossref_metadata_2025 huggingface dataset:
Environmental Assessment of Recyclable Waste Valorization in United Arab Emirates
Authors: Elfeky A , Abdallah M , Fattah K
Published: December 2021

The United Arab Emirates (UAE) has one of the largest per capita carbon footprints and solid waste generation rates in the world. In preparation for the post-oil future, the UAE has planned to diversify its energy mix with renewable sources. Waste valorization, particularly material and energy recovery (MER), presents a promising solution for the waste and energy challenges of the future. It is thus of great importance to ensure that the shift to MER systems lead to a concomitant positive impact on the environment. This research aims to assess the environmental impacts of selected waste management strategies incorporating MER systems in the UAE. The study is focused on the valorization of recyclable wastes through incinerators and/or material recovery facilities (MRFs) compared to existing landfill practices. The mass burn strategy increased the energy produced by 88% compared to the combined MER strategy due to the high energy yield of recyclables. It was found that combining energy and material recovery was the optimum environmental option in terms of global warming and abiotic depletion. The mass burn strategy had a favourable positive impact on freshwater aquatic ecotoxicity and human toxicity, yet it resulted in the highest acidification potential (ACP) and eutrophication potential (ETP). On the other hand, the MRF strategy achieved positive ACP and ETP impacts. Overall, all MER-based strategies achieved better environmental performance compared to existing landfilling practices
Reproductive phenology period of the five threatened species in Cibodas Botanic Gardens
Authors: Hidayat I W
Published: December 2021

Agathis borneensis,Castanopsis argentea,Diospyros celebica,Merrillia caloxylon, andSaurauia bracteosaare some threatened species, which have been planted in Cibodas Botanic Gardens as a garden collection. As part of the plant conservation program, their vegetative and reproductive phenology knowledge is crucial to understand when to harvest the seeds used for further propagation and restoration. The study aimed to investigate the phenology phases of these species as well as the impact of microclimates. The study used a descriptive-quantitative analysis based on the records of the exploratory-inventory observation of flowering and fruiting phase data and microclimate circumstances in 2018. Except for precipitation, the data revealed that CBG’s microclimate was considerably less diversified. The results also described thatA. borneensishas flowering and fruiting almost throughout the year.C. argenteaflowers at the end of the year and then develop into fruit at the beginning of the next subsequent year.D. celebicais also a low-intensity flowering plant that bears fruit almost all year.S. bracteosahas a long period of flowering from May to the end of the year. And then it started to develop into fruits from July to the end of the year and continued to January of the following year. Unfortunately,M. caloxylonis not shown a reproductive stage throughout the year. According to the findings, reproductive phases prominently occur early and at the end of the year, along with the rainy season. It also implied the appropriate time for seed harvesting conducted during these periods.
Blue-Green infrastructure determines the microclimate mitigation potential targeted for urban cooling
Authors: Sanusi R , Jalil M
Published: December 2021

Urban Heat Island (UHI) exacerbated by global warming can increase the thermal load in cities, which leads to more extreme climate events. One of the strategies to mitigate the impact of extreme climates and UHI is through nature-based solutions such as the Blue-Green Infrastructure as it provides environmental and community benefits However, Blue-Green Infrastructure’s role in urban cooling in the tropics still needs to be further investigated. Therefore, this study examined the role of Blue-Green Infrastructure on microclimate modifications in an urban park. Microclimate measurements were made using systematic random sampling with random start (total of 64 sampling points) at a waterbody (Blue Infrastructure) and tree and grass (Green Infrastructure) areas during solar noon time (1200-1400). Blue-Green Infrastructure showed greater microclimate benefits compared to the open space with the reduction of air temperature by up 1.6°C. However, green infrastructure had greater cooling benefits compared to Blue Infrastructure especially trees with significantly lower air temperature and solar radiation interception (0.71°C and 250.3 W/m2, respectively) as well as higher relative humidity (12.17%). Moreover, stand characteristics determine the microclimate mitigation function. This study provides a useful indication of the role of blue and green spaces in urban cooling, where it further emphasizes the importance of Blue-Green Infrastructure utilization in urban landscapes. It further recommends that urban planners, managers and policymakers should consider these strategies for urban cooling purposes : 1) Utilising Blue and Green Infrastructures especially trees 2) Tree canopy cover and DBH should be set as priority traits.
Green space in Ternate: tree species diversity and physical condition assessment
Authors: Ashari R , Irmayanti L , Peniwidiyanti  , Nurhikmah  , Fatrawana A
Published: December 2021

Greenspace has become an essential element in the built environment. As a crucial living component, trees in the green space need to be maintained to secure their longevity. In Ternate, information on the green space relating to species diversity, tree performance, and other environment variables is still lacking. One of the important green spaces in Ternate is Nukila Park. The purpose of the study was to describe the species diversity and the physical condition of trees in Nukila Park. Data was collected by recording all three species at the research site and observing their physical condition using visual tree assessment (VTA). Results showed that the tree species are dominated byPterocarpus indicus,Samanea saman, andS wietenia macrophylla. Diversity index (Shannon Wiener, H’), evenness index (E), and Richness index (Margalef, R) were H’=1.92, E=0.69, and R=2.92, respectively. These values indicate that species diversity and evenness were moderate while species richness was low. The tree health showed that most of the trees (81%) were in good condition, while the rest (19%) were damaged caused by pests and diseases. The results could be used to formulate appropriate management of Nukila Park, such as pest and disease control and species enrichment to improve tree health.
Relationship of trees as green infrastructure to pro-environmental behavior for psychological restoration in urbanized society: a systematic review
Authors: Othman N , Hamzah H , Mohd Salleh M Z
Published: December 2021

The need for green infrastructure has increased with the awareness towards a sustainable environment. Trees are considered one of the “green infrastructure” elements due to the “green” benefits they have provided to the urban environment. Greener environments are associated with mental health, and to the urban inhabitants, trees bring a multitude of environmental benefits. Even though there are various opinions on pro-environmental behavior (PEB), there are similar understandings of protecting and preserving the environment. Psychological Restoration (PR) is a cognitive progression in replenishing a good emotion via a connection with the natural environment and urban park. This paper reviews the literature published between 2005-2021 on SCOPUS and describes the current knowledge regarding PEB and PR connected to urban trees. Preferred reporting items for systematic reviews and meta-analyses known as PRISMA were employed, which deals with identification, evaluation, exclusion, and inclusion of data. Some studies have focused on how the natural environment can affect human health and well-being. Other studies have looked into the built environment and considered urban trees as a positive solution to stress alleviation and social cohesion. Hence, the reviews will provide a proposition for future research in the respective field to yield relevant results to the societies.
Future production of bioethanol from microalgae as a renewable source of energy
Authors: Wusnah  , Supardan M. D. , Haryani S. , Yunardi
Published: December 2021

Fossil fuels that mainly supply the current increasing world’s energy demand originated from non-renewable resources. In addition to the depletion of their resources within the next short time, the combustion of fossil fuels to power industries and transportation also negatively impacts humans and the environment due to the release of various gaseous pollutants. To increase the share of renewables in the primary energy mix, the Government of Indonesia is currently struggling to meet a target of 23% by 2025. Therefore, more significant efforts to search for potential renewable energy sources are the only way to overcome this issue. Bioethanol is an eco-friendly renewable energy source since its combustion emits a low concentration of pollutants. Microalgae have gained significant interest in bioethanol production because of rapid biomass growth and relatively easy pre-treatment steps. It is renewable, carbon-neutral, sustainable and can be grown in wastewater coupling as wastewater treatment. This paper reviews bioethanol production, providing knowledge on the characteristics of microalgae potential for producing biomass to be converted into bioethanol, introducing process for bioethanol production, and presenting the potential challenges of bioethanol as a future renewable energy.
Effectiveness of using the dose of mycorrhiza bio-fertilizers to increase growth and production of red paprika (Capsicum annum L.) in Ultisol Aceh
Authors: Syafruddin S , Syakur S , Jumini  , Sulaiman I
Published: December 2021

Using dose mycorrhizal bio-fertilizers can spur the growth and production of red paprika (Capsicum annum L.) on Ultisol Aceh. Besides that, it can also increase root colonization by mycorrhizal and P2O5 uptake, which red paprika plants need to produce high growth and yield. The purpose of this research was to study the effect of dose bio-fertilizer mycorrhizal on the growth and production of red paprika in Ultisols Aceh. The research was arranged by a non-factorial randomized block design with three replications. The investigated factor was the dose of bio-fertilizer mycorrhizal from local specific strain mixing between Glomus mosseae and Gigaspora sp. The dose of the mycorrhizal bio-fertilizer used was control (without mycorrhizal) of each plant, 5, 10, and 15 gram. The observed parameters were plant height and stem diameter of red paprika at 15, 30, and 45 days after transplanting; additionally, the parameter of red paprika production was observed at 125 days after transplanting and P2O5 uptake and root colonization by mycorrhizae at 60 days after transplanting. The results showed that the best dose of mycorrhizal bio-fertilizers on growth and production, root colonization, P2O5 uptake was found in the treatment of doses of 10-gram mycorrhizal bio-fertilizer for each plant.
The effect of water-saving irrigation on the growth of local rice plants
Authors: Yanti D , Berd I , Naspendra Z
Published: December 2021

The decline in the function of the watershed causes the increasing scarcity of water, while the competition for water use is increasing. A conventional method of rice cultivation (continuous inundation) is very wasteful in the use of irrigation water. Water-saving irrigation by regulating the water availability in rice fields is an effort to reduce water loss due to percolation, seepage, and runoff. The study’s purpose was to examine the effect of water availability in the field on the growth of local rice varieties. The study used 5 treatments of water availability in the field (GW < 50% AW, 50% AW < GW ≥ 60% AW, 60% AW< GW ≥ 70% AW, 70% AW < GW ≥ 80% AW, and saturated) with 3 replicates and the parameters observed were the height of plants and number of tillers. The results showed that the availability of water in the field did not affect the plant height but did affect the number of tillers. From the vegetative phase at the age of ±28 days after planting (DAP) to the beginning of the generative phase ±55 DAP, there was an addition of tillers. When the generative phase period from ± 55 DAP, the formation of the tillers stopped, and some of the tillers dried up or died.
Effects of rations containing leubiem fish (Chanthidermis maculatus) waste and phytogenic suplementation on local ducks performance in the starter phase
Authors: Daud M , Yaman M A , Zulfan
Published: December 2021

This study aims to examine the potential use of leubiem fish (Chanthidermis maculatus) waste and phytogenic supplementation on ration, in order to increase the performance of local ducks in the starter phase. This study used 100 local ducks aged 1 week old, and maintained them until 8 weeks old. The ducks were placed in 5 treatments and 4 replications groups (5 ducks / repetition). The study was conducted experimentally, using a Completely Randomized Design (CRD), consisting of 5 ration treatments, including: R1 (control); R2 (basal ration containing leubiem fish skin flour 10% + phytogenic 0.5%); R3 (basal ration containing leubiem fish head flour 10% + phytogenic 0.5%); R4 (basal ration containing leubiem fish bone flour 10% + phytogenic 0.5%) and R5 (basal ration containing leubiem fish gill flour + phytogenic 0.5%). Observed variables were feed consumption, body weight gain, final weight, feed conversion, and local duck mortality in the starter phase. The data obtained were both analyzed using Analysis of Variance (ANOVA) and Duncan’s multiple range test. The results showed that the use of leubiem fish waste and phytogenic supplementation in the ration both increased the performance of local ducks in the starter phase and had a significant effect (p <0.05) on ration consumption, weight gain, and final weight. However, they had no significant effect on feed conversion and local duck mortality in the starter phase. It was concluded that the use of leubiem fish (10% bone meal) and phytogenic supplementation 0.5% in the ration was able to increase body weight gain, and the final weight of the starter phase local ducks (aged 1-8 weeks).
Effect of irrigation methods and testing some rice cultivars against growth, root development and yield on rainfed Ultisols of Aceh Besar
Authors: Helmi H , Zakaria S , Efendi  , Munawar A A , Aulia R
Published: December 2021

The main obstacle in rice cultivation on dryland is the limitation of water availability and large fluctuation of groundwater availability. It causes plant metabolic processes to be hampered. The threat of such natural conditions can be overcomed by intensifying and using superior cultivars to adapt widely to the environment, such as being resistant to drought. This study aims to determine the effect of irrigation methods and the response of several different cultivars to growth, yield potential, and rice root systems. This research using a Split Plot Design pattern. The factors examined in this study were irrigation methods, which consisted of 3 levels of treatment, namely continuous irrigation (P1), intermittent irrigation (P2), and sprinkler irrigation (P3). Variety factors consisted of 4 levels, namely: Batutegi (V1), Situ Patenggang (V2), Inpago 5 (V3), and Sanbei (V4), so there were 12 treatment combinations with three repetitions of 36 treatment plot units. The results showed that the continuous and intermittent irrigation methods gave the highest yield per hectare and had the same weight, while the sprinkler gave the lowest yield per hectare, although not significantly different from other irrigation methods. The cultivar that gave the highest yield per hectare was Sanbei, while the lowest was Situ Patenggang, and the cultivar that gave the highest 1000 grain weight was Inpago-5, while the lowest was Sanbei, although it was not significantly different from other cultivars.
Controlled sprinkler irrigation system for agricultural plant cultivation
Authors: Satriyo P , Nasution I S , Della D V
Published: December 2021

In recent decades, precision agriculture and smart farming have become promising issues particularly in the industrial revolution era 4.0. The main objective of this presented paper is to apply the optimized controlling system developed by means of Internet of things for controlling sprinkler irrigation systems used for agricultural product cultivation where in this study, we used shallot plants. The controlling systems were established by designing hardware and software used to monitor water distribution in sprinkler irrigation for onion plants during five initial days of cultivation. The result showed that controlled irrigation can optimize and monitor all plant growth indicators namely soil moisture, temperature, air humidity and water discharge and be able to carry out watering according to the desired level of soil moisture. It may conclude that a controlled sprinkler irrigation system can be applied as a part of precision agriculture practice in order to enhance production and sustainable agriculture.
Design and performance testing of areca nut thresher machine using solid triangle spike tooth type
Authors: Bulan R , Mustaqimah  , Siregar K , Lesdiana S R , Anwar K , Sitorus A
Published: December 2021

Technology for handling agricultural products from areca nut has received less attention. However, the economic potential of the areca nut is comparable to that of other palm trees. Threshing areca nut from the bunch is one of the procedures that must be completed to obtain high-quality betel nut. Therefore, this research aims to design and test an areca nut threshing machine that uses a solid triangle spike-type threshing tooth. This study uses an experimental manufacturing method in the workshop and laboratory testing. A detailed engineering drawing of areca nut thresher machine is a guide in carrying out the manufacturer. The influence of rotational speed on the threshing shaft (34 rpm, 42 rpm, and 50 rpm) was investigated to determine the machinery’s performance (percentage of threshing results, engine capacity, and fuel consumption). This study indicates that the areca thresher machine has been successfully designed with a diesel motor driving source of 6.5 hp, 2200 rpm. Applied a rotational speed of 50 rpm will give the best percentage of threshing products. The increase in rotational speed applied to the threshing machine will be in line with the rise in the engine capacity. In addition, the fuel consumption of a diesel engine from this thresher machine is 0.039 l/hr.
Diversity of Benthic Organisms on Artificial Reef Structure
Authors: Hudatwi M , Syari I A , Utami E , Nugraha M A , Akhrianti I , Pamungkas A
Published: December 2021

One of the methods of a marine rehabilitation program to accelerate the recovery of damaged coral reefs is to make artificial reefs as a new coral growth substrate. Interestingly, many benthic invertebrates overgrowth the artificial reef structures. The purpose of this study was to investigate the benthic organisms encrusting the artificial reefs including the cement and iron substrates. In June 2018, 10 artificial reef structures were deployed in 7-8m depth around Putri Island, Belinyu, Bangka Regency. The artificial reef structures were made in the form of an iron frame with a cement concrete weight. Colonization of sessile benthic organisms is generally marine invertebrates; Scleractinia corals, sponges, bivalves, hydrozoa, bryozoa, soft corals, gastropoda, crinoid, ascidian, and gorgonian. Natural recruited coral Pocillopora sp. was found in all artificial reef structures with colony sizes 3-8cm and surprisingly only coral pocillopora found adhered in iron frames and sinkers. The other benthic organisms are sponge, crinoid, and bryozoa with the number of densities are 2 organism/m2. Meanwhile, the lowest benthic density are groups of Mollusc and Ascidian with organism/m2. The type of succession that occurs in this research was likely a primary succession. The preference of benthic organisms among reefs appeared to be related to the proximity of natural hard-bottom habitat and type of iron and coating materials.
Environmental management and the implications to the plant varieties protection in Bangka Belitung Islands
Authors: Darwance D , Sari R , Anwar M S
Published: December 2021

Plant varieties protection is one of intellectual property rights branches providing protection to breeders, a people who carries out research and testing or the activity of discovering and developing a plant variety to produce new variety. In addition, it also known local varieties, namely varieties that already exist and are cultivated from generation to generation by farmers, and belong to the community. Varieties cannot be protected if one of them on the contrary to the environmental sustainability. On the other hand, the environment is one of the problems faced by the people of Bangka Belitung Islands until now, especially when it is associated with mining activities. This empirical juridical research method analyzes how the impact of environmental protection and management efforts towards the efforts to protect plant varieties in the Bangka Belitung Islands. The result of the research indicates that the damaged environment due to massive mining has implications to the protection of plant varieties in this area. The clearing of land plots and housing that has been happening lately also has implications, either cleared or built on land that was originally primary forest or built on land that was originally a plantation consisting of local varieties.
The effect of shape toward characteristics of cerium-iron-boron thin layer
Authors: Indriawati A , Sari R , Sulanjari
Published: December 2021

The development of spintronic devices in the magnetic memories industry has attracted researchers over decades. Therefore, researchers are trying to obtain materials which compatible to improve device performance. These materials are made in the form of thin layer. Cerium-iron-boron (Ce-Fe-B) alloy is one of potential materials to be applied for magnetic devices. In this study, the nucleation changes in the Ce-Fe-B thin layer were analyzed using circular and rectangular shapes. This phenomenon was observed through micromagnetic simulations. The magnetic moment stability of Ce-Fe-B was analyzed based on the response of the magnetic moment towards the presence of an external magnetic field. The magnitude of applied external magnetic applied is 0.4 Tesla in x-axis direction. Changes in the arrangement of magnetic moments due to external magnetic fields produce magnetization and anisotropy energy value which describing the characteristics of the Ce-FeB thin layer. Magnetization value of Ce-Fe-B thin film in circular shape was greather than rectangular shape. These value was 0.98 for circular shape and 0.93 for rectangular shape. On the other hand, anisotropy energy value on magnetic external apllied 400 mT, circular shape anisotropy energy’s value of Ce-Fe-B was 4.85×10-18 J, and 6.71×10-18 J for rectangular shape.
Groundwater vulnerability assessment and mapping in shallow groundwater
Authors: Aribowo K , Wilopo W , Barianto D H
Published: December 2021

The increasing population density can contaminate groundwater. So far, groundwater is still the primary source to fulfill clean water and drinking water in Muntilan, Salam, and Ngluwar Sub-District. Studies on groundwater vulnerability are essential to minimize the contamination risks as a piece of basic information for land use planning. This research aims to assess groundwater vulnerability in Muntilan, Salam, and Ngluwar Sub-District. The simple vertical vulnerability (SVV) method with GIS was selected to develop a groundwater vulnerability map. The parameters of this method consist of the type of soil/rock, the thickness of the water-unsaturated zone, and the recharge value. The results show that the research area can be divided into three vulnerability classes: very low, moderate, and high groundwater vulnerability. Very low groundwater vulnerability has a value of more than 70 with very high protection effectiveness. The class is distributed in Muntilan and Salam Sub-Districts. Moderate groundwater vulnerability has a value less than 35 to 65 with moderate protection effectiveness, and high groundwater vulnerability has a value ranging from 24 to 35 with low protection effectiveness. Both of the class is evenly distributed in Muntilan, Ngluwar and Salam Sub-Districts.
Removal of Congo Red and Procion Red Using Zn/Fe Pillared Bentonite
Authors: Desnelli  , Asri W R , Hasanudin  , Said M , Hariani P L
Published: December 2021

The process of pillarization of metal oxide Zn/Fe compounds in bentonite has been carried out. The study of adsorbent weight, pH, adsorption time, and initial concentration were investigated to get the optimum reduction of Congo red and Procion red concentration. In addition, the pseudo kinetic also determined to investigate the rate and type of adsorption. From the experiment, the optimum conditions for removal of Congo red for the adsorbent weight, pH, and adsorption time were 0.02 g, 2, 20 minutes, respectively, while for the removal of Procion red was 0.04 g, 2, 20 minutes, respectively and both of adsorbent followed the pseudo-second-order model kinetics with chemisorption mechanism. Although the optimum conditions for removal of the two dyes were similar, in fact the percentage removal of the Congo red dye was greater. In conclusion, the Zn/Fe pillared bentonite was more suitable for the removal of the Congo red than Procion red.
The Diversity of Fruit Fly (Diptera: Tephritidae) on Combination of Attractant and Different Trap Height in Cucumber Field (Cucumis sativus L.)
Authors: Apriyadi R , Saputra H M , Sintia S , Andini D E
Published: December 2021

The main pest in the Cucurbitaceae family is the fruit fly. The common effort to control fruit flies is using a trap with methyl eugenol (ME) and cue lure (CUE) as an insect attractant. The trap height installation is also affecting the fruit fly population. The fruit fly population in the field has an important effect on the damage intensity in the commodity. This research objective was to study the distribution and diversity of fruit fly on the cucumber field with trap height installation and attractant combination. The used research method was Factorial Group Randomized Design (RAKF). The first factor was attractant combination of Metil Eugenol (ME) and Cue Lure (CUE) consisted of 6 treatment levels were K1 : 5 mL ME, K2: 5 mL ME + 1 mL CUE, K3: 5 mL ME + 3 mL CUE, K4: 5 mL ME + 5 mL CUE, K5: 5 mL ME + 7 mL CUE and K6 : 5 mL CUE. While the second factor was the high tramp installation consisted of 3 treatment levels were T1: 50 cm, T2: 100 cm, and T3: 150 cm. The treatment consisted of 3 replication on three different cucumber fields. The result showed discovered fruit fly species were eight species, B. dorsalis (Hendel), B. carambolae Drew & Hancock, B. occipitalis (Bezzi), Z. caudata (Fabricius), B. umbrosa (Fabricius), B. neocognata Drew & Hancock, Z. cucurbitae (Fabricius) and B. albistrigata (de meijere). The dominant fruit fly in each treatment in fruit fly fields was B. dorsalis (Hendel). The best treatment in trapping fruit fly was K1 (5 mL ME) with trap height installation T1 (50 cm). The diversity and species richness of fruit fly in the cucumber field was considered low and uneven.
Techno-economic evaluation of integrated levulinic acid-bioethanol plant design based on oil palm empty fruit bunches
Authors: Muryanto  , Putri K L , Srinophakun P , Gozan M
Published: December 2021

Currently, renewable energy started to become a focus of the world as it can be an alternative to fossil energy. Bioethanol is the result of glucose fermentation derived from lignocellulosic raw material (second-generation bioethanol). As one of the countries with the most significant biomass resources globally, Indonesia has a huge opportunity to develop the bioethanol industry. Oil Palm Empty Fruit Bunch (OPEFB) is the most significant solid waste generated by oil palm plantations. Levulinic acid can be used as a chemical platform for biodiesel production, which has a higher selling price than bioethanol. In this research, techno-economic evaluation of integrated levulinic acid-bioethanol plant based on OPEFB was conducted. Optimization of production capacity is done to determine the suitable plant capacity so that the integrated levulinic acid-bioethanol plant is feasible to be developed. Based on simulation results with SuperPro Design 9.5 and analysis of the economic value, Net Present Value (NPV), Internal Return Rate (IRR), and the payback period is 53.939.000 USD; 29,77%; and 4,52 years, respectively. In conclusion, an integrated levulinic acid-bioethanol plant based on OPEFB has fulfilled the economic parameters of a chemical plant.
Current research in development of polycaprolactone filament for 3D bioprinting: a review
Authors: Amni C , Marwan  , Aprilia S , Indarti E
Published: December 2021

Three-dimensional printing (3DP) provides a fast and easy fabrication process without demanding post-processing. 3D-bioprinting is a special class in 3DP. Bio-printing is the process of accurately 3DP structural design using filament. 3D bio-printing technology is still in the development stage, its application in various engineering continues to increase, such as in tissue engineering. As a forming material in 3D printing, many types of commercial filaments have been developed. Filaments can be produced from either natural or synthetic biomaterials alone, or a combination of the two as a hybrid material. The ideal filament must have precise mechanical, rheological and biological properties. Polycaprolactone (PCL) is specifically developed and optimized for bio-printing of 3D structures. PCL is a strategy in 3D printing to better control interconnectivity and porosity spatially. Structural stability and less sensitive properties environmental conditions, such as temperature, humidity, etc make PCL as an ideal material for the FDM fabrication process. In this review, we provide an in-depth discussion of current research on PCL as a filament currently used for 3D bio-printing and outline some future perspectives in their further development.
Bamboo fiber-PLA composite materials for disposable food and beverages packaging tools: a brief review
Authors: Darwin S , Prajna G , Tamba T A
Published: December 2021

Disposable packaging tools such as cups/food containers have become popular and commonly used items in today’s society as they offer simplicity, low cost, durability, and convenience for people in carrying/taking their foods. Most of these packaging tools are non-biodegradable products because their materials are mainly composed of plastics and/or their derivatives. Consequently, packaging tools have become one of the primary contributors to the earth’s waste and global warming. Eco-friendly products can be defined as products that are safe and healthy for individuals and communities throughout their life cycle, which includes all processes from production to consumption and up to disposal. Current methods for developing eco-friendly products have mainly relied on using composites of different biodegradable materials that are chosen and combined in such a way that they can complement each other’s weakness or drawback. One of these composites with the potential to replace and address the negative impacts caused by plastics products is the bamboo fiber-PLA (BF-PLA) composite. This paper is intended to briefly discuss the characteristics of as well as various important properties of such a BF-PLA composite to illustrate and motivate its potential future use as an alternative eco-friendly material for producing disposable packaging tools.
In vitro study of Cratoxylum glaucumStem ethyl acetate extract as antidiabetic
Authors: Roanisca O , Mahardika R G , Widyaningrum Y
Published: December 2021

Diabetes mellitus (DM) is a disease characterized by hyperglycemia due to decreased insulin secretion, or decreased insulin sensitivity, or both. If insulin is not available or the amount is low, then glucose cannot enter the cells and will continue to be in the bloodstream. DM can cause chronic complications such as eye complications, skin infections and stroke. DM treatment takes a long time by using synthetic drugs that will cause side effects, therefore the search for herbal-based drugs is the community’s choice. Idat plant (Cratoxylum glaucum) is a local plant from Bangka Belitung. Several studies on the genus Cratoxylum from China and Thailand showed a very high inhibitory ability against the inhibition of a-glucosidase enzymes, protein tyrosine phosphate, and carbohydrate hydrolysis enzymes because they contain phenolic compounds anthraquinones and xanthones. Therefore, the importance of more intensive research on C. glaucum species regarding the content of secondary metabolites in C. glaucum stems and their antidiabetic power. The extraction method in this research is maceration with ethyl acetate solvent. Qualitative examination of phenolic and flavonoid content using reagents, as well as antidiabetic testing was carried out in vitro with dengan α-glucosidase enzyme inhibition method. Based on qualitative testing of phenolic and flavonoid compounds, the content of these compounds was obtained. antidiabetic test showed that the-glucosidase inhibitor of ethyl acetate extract had very strong activity with an IC50 of 4.21 g/mL. Therefore, the stem of the idat plant can be used as a therapy for the treatment of diabetes mellitus.
Ecological design ideas of large-scale public buildings: review of Russian Botanical Garden greenhouses ecological design
Authors: Budilovskaia A , Yu S
Published: December 2021

With the rapid development of cities around the world, the concept of ecological design of large-scale public buildings has gradually come to the attention of the public. One of the main problems is the possibility of maintaining a balance between urban development, nature and man, which creates conditions for improving the environment and improving the quality of life of the population. An ecologically comfortable environment is considered today as one of the main prerequisites for the development of a particular territory. This article first gives a brief overview of scientific sources on the design of public buildings in botanical gardens, then discusses the principles of environmental design of large-scale public buildings and, finally, review the ideas of environmental design of greenhouse buildings in Russian botanical gardens from two aspects of form and content. The relevance of the work is ensured by the fact that botanical gardens occupy an important place in any city and it is necessary to understand how to update the garden space, how to respond to the new requirements of society and by what means to attract more visitors. Based on the analysis of various examples, the author notes the existing problems of construction of large-scale public buildings of eco-friendly design in Russian botanical gardens, and also comes to the conclusion that the landscape architecture of Western Europe and the experience of Western engineers in eco-friendly construction has a great influence on the image of modern Russian botanical gardens.
Performance investigation of grid-connected photovoltaic systems for family household: A case study in Amman, Jordan
Authors: Kassem Y , Çamur H , Othman A A , Alshrouf L , Yasin M , Abu-Aysheh Y
Published: December 2021

The main objective of the paper is to investigate the feasibility of small-scale grid-connected PV systems with various PV technologies (mono-crystalline silicon and poly-crystalline silicon) and sun-tracking modes including fixed tilt and 2-axis systems for rooftop households in Amman, Jordan. A case study is applied to Al Jama’a and Abu Nusir, Amman, Jordan. Typical households were chosen for this region to establish a load profile according to monthly electrical bills. The results show that the annual electrical energy from fixed small-scale PV panels tilted at an optimal angle was ranged from 3499.04kWh to 8811.62kWh, while the annual electrical energy from the PV tracking system was within the range of 4788.05-12128.30kWh. This amount of energy output would contribute significantly to reduce fossil fuel consumption and CO2 emissions in the country. Moreover, it is found that the highest energy consumption can be covered by PV systems is recorded in winter. Also, the average energy production cost is ranged from 0.0444-0.0530$/kWh for all proposed systems based on the financial assumptions used in this study. It is concluded that the small-scale grid-connected rooftop PV systems are found to be economically justifiable.
Kinetic evaluation of methylene blue decolorization by CuO as a Fenton-like catalyst
Authors: Tiandho Y , Afriani F , Evi J , Lingga R , Handoyo
Published: December 2021

The presence of dyes in wastewater is one of the main problems in wastewater treatment. Wastewater containing dyes can damage the ecosystem because it can block sunlight into the water and is often accompanied by toxic materials. This paper proposes an alternative method to decolorize dyes in water using CuO as a Fenton-like catalyst, especially for wastewater contaminated by methylene blue dye. The Fenton method is an advanced oxidation process method with a radical group of H2O2 acting as the primary decolorizing agent. By measuring the concentration using a UV-Vis spectrophotometer, we found that the proposed decolorization method effectively degraded the color of methylene blue. To understand the decolorization mechanism, we investigated the reaction kinetics of the decolorization process. We found that compared to the pseudo-first-order and second-order reaction kinetics models, the BMG model had higher accuracy and conformed to the color concentration degradation curve.
Optimization of ilmenite ore processing using induced roll magnetic separator
Authors: Virgiawan M R , Pitulima J
Published: December 2021

PT Timah Tbk has been processing residual ore (SHP) with a low tin grade of ± 10-30% wt. To increase tins grade and associated mineral products to be a high grade (> 70% wt), an evaluation and optimization process is needed on Induced Roll Magnetic Separator processing equipment. The evaluation and optimization process was carried out on magnetic products, especially ilmenite minerals. Sampling is done on the feed and the product based on the tool parameter settings. The feed rate is set at 380, 320, 250, 420, and 470 gr/10s. The splitter opening is set at 10, 15, 20 mm of magnetic rollers. While the electric current is set at 2, 4, 6, 8, 10, 12, 14 amperes. Mass and grade data are then analyzed by regression and variance statistical methods and optimized by the response surface method. The evaluation results show that only the splitter opening parameters and electric current strength are significant in explaining the product results obtained with a level of hypothesis error of 5%. The results of IRMS optimization show that the best parameter conditions are in the 2-4 ampere of electric current and 10-15 mm of splitter openings with illmenite grade capable of> 80% wt in the second order of central composite design.
Seawater Intrusion Assessment based on Hydrochemical Data in Gapura Sub-district of Sumenep Regency, East Java, Indonesia
Authors: Warist R K , Wilopo W , Setiawan N I
Published: December 2021

Gapura is a sub-district with a large salt pond in Sumenep Regency, Madura Island, Indonesia. In this area, many residents’ houses have drilled wells to meet their water needs. One factor is that Municipal Waterwork (PDAM) does not reach the area due to limited water sources and difficult accessibility. Residents in the area claimed to have found some groundwater that tasted brackish. This study aims to apply hydrochemical analysis to identify the possibility of seawater intrusion in the area. The assessment of seawater intrusion uses the total dissolved solids (TDS) value and major ion of groundwater samples. In the analysis of thirty samples, two samples have different values from the samples of freshwater. However, the value of these two samples is relatively low to be classified as seawater intrusion. It is described on the TDS values that belong to the class of brackish water, from Simpson ratio values classified as slightly contaminated, and from the piper diagram plot that is still in the mixing zone in the middle of the diagram. The presence of brackish water in these samples can be caused by a location close to salt pond activities.
Settlement Negotiations with Reference-Dependent Preferences
Authors: Rössler Christoph , Friehe Tim
Published: December 2021

This article analyzes pretrial bargaining between litigants with reference-dependent preferences. We build on Bebchuk (1984, “Litigation and Settlement under Imperfect Information,” 15 Rand Journal of Economics 404–15) and, motivated by empirical evidence, assume that the referent is based on expectations. We find that reference dependence on behalf of plaintiffs increases the settlement probability. The fact that preferences are reference-dependent meaningfully influences comparative statics predictions. In our extensions, we discuss the role of fee shifting, the effect of having the referent based on the status quo instead of on expectations, and risk aversion.
The Status of Chinese State-owned Enterprises in International Investment Arbitration: Much Ado about Nothing?
Authors: Du Ming
Published: December 2021

Chinese State-owned enterprises (SOEs) play a key role not only in China’ domestic market, but also in implementing the Government of China (GOC)’s ambitious Belt and Road Initiative. Accordingly, Chinese SOEs have increasingly fallen back on investor-State investment arbitration to protect their investments in host States. A recurrent issue arising in arbitral proceedings concerns whether Chinese SOEs should be allowed access to investor-State dispute settlement mechanisms in view of the close links between Chinese SOEs and the GOC. This article sets forth two arguments. First, applying the relevant ILC Articles to Chinese SOEs, the article makes a legal argument that it is highly unlikely for a Chinese SOE to be denied standing as a qualified claimant in investor-State arbitration. Second, notwithstanding concerns about Chinese SOEs in the global investment landscape, the article makes a policy argument that the denial of Chinese SOEs’ standing before arbitral tribunals is not only unhelpful in addressing those concerns, but also undermines the rule of law in international investment.
Differences in Post-mRNA Vaccination Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) Immunoglobulin G (IgG) Concentrations and Surrogate Virus Neutralization Test Response by Human Immunodeficiency Virus (HIV) Status and Type of Vaccine: A Matched Case-Control Observational Study
Authors: Spinelli Matthew A , Peluso Michael J , Lynch Kara L , Yun Cassandra , Glidden David V , Henrich Timothy J , Deeks Steven G , Gandhi Monica
Published: December 2021

Following severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) mRNA vaccination, people living with human immunodeficiency virus (HIV, PLWH) had lower surrogate virus neutralization test response (P = .03) and a trend toward lower immunoglobulin G (IgG) response (P = .08), particularly among those with lower CD4+ T-cell counts and who received the BNT162b2 vaccine. Study of the impact of supplemental vaccine doses among PLWH is needed.
Infectious Diseases Society of America Guidance on the Treatment of AmpC β-Lactamase–Producing Enterobacterales, Carbapenem-ResistantAcinetobacter baumannii, andStenotrophomonas maltophiliaInfections
Authors: Tamma Pranita D , Aitken Samuel L , Bonomo Robert A , Mathers Amy J , van Duin David , Clancy Cornelius J
Published: December 2021

The Infectious Diseases Society of America (IDSA) is committed to providing up-to-date guidance on the treatment of antimicrobial-resistant infections. A previous guidance document focused on infections caused by extended-spectrum β-lactamase–producing Enterobacterales (ESBL-E), carbapenem-resistant Enterobacterales (CRE), and Pseudomonas aeruginosa with difficult-to-treat resistance (DTR-P. aeruginosa). Here, guidance is provided for treating AmpC β-lactamase–producing Enterobacterales (AmpC-E), carbapenem-resistant Acinetobacter baumannii (CRAB), and Stenotrophomonas maltophilia infections. A panel of 6 infectious diseases specialists with expertise in managing antimicrobial-resistant infections formulated questions about the treatment of AmpC-E, CRAB, and S. maltophilia infections. Answers are presented as suggested approaches and corresponding rationales. In contrast to guidance in the previous document, published data on the optimal treatment of AmpC-E, CRAB, and S. maltophilia infections are limited. As such, guidance in this document is provided as “suggested approaches” based on clinical experience, expert opinion, and a review of the available literature. Because of differences in the epidemiology of resistance and availability of specific anti-infectives internationally, this document focuses on the treatment of infections in the United States. Preferred and alternative treatment suggestions are provided, assuming the causative organism has been identified and antibiotic susceptibility results are known. Approaches to empiric treatment, duration of therapy, and other management considerations are also discussed briefly. Suggestions apply for both adult and pediatric populations. The field of antimicrobial resistance is highly dynamic. Consultation with an infectious diseases specialist is recommended for the treatment of antimicrobial-resistant infections. This document is current as of 17 September 2021 and will be updated annually. The most current version of this document, including date of publication, is available at www.idsociety.org/practice-guideline/amr-guidance-2.0/.