Characterization and evaluation of novel sustainable polymers derived from renewable rosin

Purpose This study aims to prepare low-cost biomaterials from renewable natural resources (rosin). Design/methodology/approach Preparation of different biomaterials, ethylene glycol maleic rosin (EGMR), glycerol maleic rosin, pentaerythritol maleic rosin and sorbitol maleic rosin (SMR) esters, then evaluated by stability studies, moisture absorption, swelling index parameters, thermogravimetric analysis and skin irritation studies. Findings The prepared rosin derivatives had excellent moisture safety, according to the results. From EGMR to SMR, the swelling indices increase. Research limitations/implications These rosin biomaterials were used in coating, especially in the field of pharmaceutical coating, and good results were obtained in this study. Practical implications As these biomaterials rosin derivatives have excellent moisture resistance, they are recommended for use as coating materials for moisture-sensitive drugs. Originality/value There has recently been a lot of interest in researching the effects of rosin derivatives in various drug delivery systems.

FAKTOR-FAKTOR PENYEBAB TERJADINYA PENCEMARAN AIR DI SUNGAI BINDU

Indonesia is a very large and wide country, consisting of many islands and abundant natural resources. Natural resources in Indonesia are everything that comes from nature that is used to meet the needs of human life. Generally, natural resources in Indonesia can be classified based on their nature, namely renewable natural resources and non-renewable natural resources. Humans are very dependent on natural resources and the sustainability of natural resources is strongly influenced by human activities. Watershed is one of the natural resources that is very complex and consists of various components that make it up. The functions and benefits of water resources themselves, including rivers, require various efforts to improve and protect water so that it is efficient and effective for living things and the surrounding environment. One of them is the Bindu river in the Kesiman Traditional Village. The Bindu River is widely used by the community, causing water pollution in the Bindu river, such as the Kesiman Traditional Village which has an important role in suppressing the occurrence of water pollution that occurs in the Bindu river. Negara Indonesia merupakan negara yang sangat besar dan luas, terdiri dari banyak pulau dan sumber daya alam yang melimpah. Sumber daya alam di Indonesia merupakan segala sesuatu yang berasal dari alam yang digunakan untuk memenuhi kebutuhan hidup manusia. Umumnya sumber daya alam di Indonesia dapat digolongkan berdasarkan sifatnya yaitu sumber daya alam yang dapat diperbaharui dan sumber daya alam yang tidak dapat diperbaharui. Manusia sangat bergantung pada sumber daya alam dan kelestarian sumber daya alam sangat dipengaruhi oleh aktivitas manusia. Daerah aliran sungai merupakan salah satu sumber daya alam yang sangat kompleks dan terdiri dari berbagai komponen yang menyusunnya. Fungsi dan manfaat sumber daya air sendiri termasuk sungai memerlukan berbagai upaya untuk peningkatan dan perlindungan air agar berdaya guna dan berhasil guna bagi makhluk hidup dan lingkungan sekitar. Salah satunya adalah sungai Bindu yang berada di Desa Adat Kesiman. Sungai Bindu banyak dimanfaatkan oleh masyarakat sehingga menyebabkan terjadinya pencemaran air di sungai Bindu, seperti Desa Adat Kesiman memiliki peranan penting dalam menekan terjadinya pencemaran air yang terjadi di sungai Bindu.

Reuse of red ceramic waste in the production of concrete for civil construction

In search of the reuse of waste from civil construction, studies are presented as an alternative on the insertion of this waste into materials so that they become ecologically viable and at a lower cost. In this scope, there is the red ceramic waste (RCW), which is largely produced both in renovation works and in the stage of transporting construction components such as bricks, slabs, and floors. On the other hand, the use of cement is of great proportions, which raises concerns about the excessive consumption of non-renewable natural resources, especially in large-scale projects. Thus, the study aimed to evaluate the mechanical properties of compressive strength of concrete with partial replacement of cement by RCW and to verify the influence at different breakage ages (7, 14, 21, and 28 days). Five mixes were used, the first with 100% cement, and the others with crushed RCW to replace 5%, 10%, 15%, and 20% of the cement, and the resistance obtained according to percentages and ages was also verified of RCW through the uniaxial compression test. Thus, it was observed that for replacements of up to 15%, the strength losses were not significant, suggesting the feasibility of its use in works with high concrete demands, such as in dams.

Analisa Pengaruh Perbedaan Winding terhadap Back EMF dan Ke pada PMSG 18s16p

Electrical energy depends on the non-renewable natural resources which depletion all year. It has been a reason to run the research about renewable energy. In terms of renewable energy, wind power, has various types of wind turbines which able to produce quality new renewable electrical energy. The problems should be assessed was how to wind a coil or winding in a generator needs. It was important to result a good quality wind turbine. From this study, there are 2 winding options on the PMSG 18s16p which have same winding direction for each coil with average tension. This winding obtained about 4.188 V. The second option was the winding which has an average voltage value of 4.762 V but the windings stand in the opposite direction for some coils. It should been considered by an engineer if the use of generator to produce a larger output. On the other hand, to make easier manufacturing, the next study must sacrifice the resulting output.

Economic Aspects Related to Investments in Energy-Efficient Houses in the Framework of Bioeconomy

The challenges related to the sustainable use of renewable natural resources and the European Union's attention to the bioeconomy provide Romania with the legislative framework and building and innovation opportunities in the field of construction, with benefits for consumers, society, and the environment. EU-wide regulation focuses on nearly zero energy buildings (NZEB), with a differentiated degree for each member state of the European Union. That is the reason why, in this article, the authors focus on the economic and the technical aspects, on the minimal way in which it is approached in the scientific literature, as it is reflected in the national legislative structure, and as it is present in the applied practice in Romania.

Conventional and Contemporary Techniques for Removal of Heavy Metals from Soil

One of the most important components of the natural environment is soil. Soil is a non-renewable natural resources on which the whole human society is dependent for various goods and services. The intensive, and unsustainable anthropogenic practices along with the rapid growth of the human population have led to continuous expansion and concern for the degradation of soil. The agricultural soil is exposed to a plethora of contaminants, the most significant contaminant among them is heavy metals. The major sources of heavy metal contamination are associated with agriculture, industries, and mining. The increase of heavy metal contents in the soil system affects all organisms via biomagnification. In this chapter, we will review various conventional and contemporary physical or chemical and biological techniques for remediation of contaminated soil. The advanced solution for degraded soil is integrating innovative technologies that will provide profitable and sustainable land-use strategies.

Environmental monitoring and development of environmental protection measures in the conditions of the Ryazan region enterprise

Annotation Environmental monitoring allowed us to analyze the state of the environment and forecast the development of the situation. It included the control of natural and anthropogenic factors of various kinds. Environmental control allowed us to assess the ecological state of agricultural landscapes in the conditions of the NGO "Zarya" of the Ryazan district, the Ryazan region. The information obtained will reduce the anthropogenic pressure on the environment and the population, as well as optimize the use of non-renewable natural resources. Keywords: ENVIRONMENTAL MONITORING, ECOLOGY, ENVIRONMENTAL PROTECTION MEASURES, ENVIRONMENT