4TH INTERNATIONAL SEMINAR ON CHEMISTRY最新文献

{"title":"THE APPLICATION OF LEADERSHIP IN THE POPULATION AND CIVIL REGISTRY OFFICE OF TULUNGAGUNG REGENCY","authors":"Nunun Nurhajati, Maura Irene Novianti, Anindia Ainur Roqimah, R. Prasetya","doi":"10.36563/proceeding.v4i0.87","DOIUrl":"https://doi.org/10.36563/proceeding.v4i0.87","url":null,"abstract":"This research aims to Apply Leadership in the DiSpendukCapil Kab. Tulungagung. This study aimed to determine the implementation of leadership in the Population and Civil Registry Office of Tulungagung Regency. This study refers to a qualitative approach with data collection techniques in the form of observation, interviews and taking pictures. In addition, information is presented using a descriptive approach. Data were collected at the Tulungagung Regency Population and Civil Service Office by interviewing several heads of the Tulungagung Regency Population and Civil Registry Office. The results of the research that the researchers conducted showed the implementation of leadership by the KaDisPendukCapil of Tulungagung Regency. With metrics, decisions are made collaboratively, considering employee capabilities, appreciating criticism, suggestions, and opinions of employees, and collaborating with subordinates. It can be classified that the Head of the Population and Population Registration Office of Tulungagung Regency uses a democratic leadership style and bureaucratic leadership. \u0000 ","PeriodicalId":6833,"journal":{"name":"4TH INTERNATIONAL SEMINAR ON CHEMISTRY","volume":"41 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82676594","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"THE ANALYSIS OF PATERNALISTIC LEADERSHIP STYLE OF THE HEAD OF THE KARANGREJO WATER RESOURCES SERVICE TECHNICAL IMPLEMENTATION UNIT TULUNGAGUNG REGENCY","authors":"Anang Sugeng, Catur Citraaiwitri Sani, Deva Alfi Andra, Jainal Tua Hunus","doi":"10.36563/proceeding.v4i0.80","DOIUrl":"https://doi.org/10.36563/proceeding.v4i0.80","url":null,"abstract":"Culture and customs in Indonesia highly uphold the values ​​and norms that guide the implementation of leadership in each region. The application of cultural traits can be done using a paternalistic leadership style. Regional autonomy allows local governments to preserve local culture, including how to lead organizations by applying Eastern culture through paternalistic concepts. As part of the leadership of the local government, the Karangrejo Water Resources Office Technical Implementation Unit (UPTD SDA) of Tulungagung Regency applies paternalist leadership in its management. This research examines how the head of UPTD SDA Karangrejo implements the paternalistic leadership style. The research aims to identify and analyze the application of paternalist theory indicators in practice by the head of UPTD SDA Karangrejo. Some of the problems that occur in applying a paternalistic leadership style at UPTD SDA Karangrejo include the lack of opportunities for subordinates to develop creativity and imagination and the lack of motivation of subordinates and the lack of employees in carrying out daily tasks. This study uses qualitative research methods with descriptive methods. The data used is primary data. The research method used descriptive qualitative through interviews with UPTD SDA Karangrejo employees. Result 1). Paternalistic leadership is synonymous with the role of a fatherly leader. In this case, a leader is like a father to his children, namely the nature of protecting and nurturing his subordinates. 2). In making a decision, a leader must ask for advice from his employees or subordinates. 3). Leaders who are always right can lead to an authoritarian attitude even though sometimes the head of UPTD SDA Karangrejo wants to listen/accept suggestions from his employees. 4). The head of UPTD SDA Karangrejo rarely gives opportunities to his subordinates to develop creativity and imagination. 5). Head of UPTD SDA Karangrejo always obliges and demands his subordinates to obey the rules set. Paternalistic leadership runs effectively in the management of UPTD SDA Karangrejo, Tulungagung Regency.","PeriodicalId":6833,"journal":{"name":"4TH INTERNATIONAL SEMINAR ON CHEMISTRY","volume":"19 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77222239","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Response of tobacco (Nicotiana tabacum L.) under waterlogging stress based on agronomic characters","authors":"T. Nurhidayati, Wanda Y. Safitri, H. Purnobasuki, S. Hariyanto","doi":"10.1063/5.0051852","DOIUrl":"https://doi.org/10.1063/5.0051852","url":null,"abstract":"Tobacco is an agricultural crops of high economic value. The uncertain climate caused farmers is difficult to predict the coming of the rain, so that tobacco farming is often hit by waterlogging and flooding. Waterlogging of harvest failure. Therefore, it is necessary to investigate the influence of waterlogging stress in tobacco plants. Research also has the benefit of getting tolerant varieties waterlogging stress. The parameters observed plant height, root length, number of adventitious roots, dry weight, the ratio of roots and canopy observation aerenchyma area. Data were analyzed using Two-way ANOVA followed by Tukey’s test, with a level of 95%. The results showed that the interaction between varieties and treatments waterlogging stress affects the parameters of root length, plant height, number of adventitious roots and dry weight of plants. The results showed that the waterlogging stress cause deterioration in growth, adventitious root formation and aerenchyma in plants. Tolerant varieties Sensitivity Index is based on the calculation of varieties Paiton 1 and Maesan 1.","PeriodicalId":6833,"journal":{"name":"4TH INTERNATIONAL SEMINAR ON CHEMISTRY","volume":"47 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78201082","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Synthesis and phase transformation of hydroxyapatite from Indonesian natural sources","authors":"K. Wahyudi, Herlina Damayanti, R. Manullang, Ayu Ratnasari, Nurhidayati, A. Yulianti","doi":"10.1063/5.0051972","DOIUrl":"https://doi.org/10.1063/5.0051972","url":null,"abstract":"Hydroxyapatite (HAp) is an essential material for human bone growth. Several methods of hydroxyapatite synthesis that have been developed are hydrothermal, mechanochemical, and wet precipitation methods. Synthetic HAp applications may vary widely from bone repair, metal implant coating to artificial bone. This study used Padalarang lime and food grade phosphoric acid 85%. Wet precipitation method was proposed based on calculated the stoichiometric molar ratio of Ca/P corresponding for HAp and followed by heat treatment from 600, 700, 800, 900, 1000, 1100, 1200 and 1400°. Structural characterization and thermal analysis were done using X-ray diffraction (XRD) and Thermal Gravimetry / Differential Thermal Analaysis (TG/DTA). The XRD results showed that HAp undergoes phase transformation. Heat treatment from 600° – 900° gave slowly crystallization on HAp. At temperature 1100°, XRD pattern showed the similar crystalline with natural HAp. At temperature 1200 and 1400°, XRD pattern slightly appeared octocalcium phosphate (OCP) crystalline. The result of TG/DTA showed endothermic reactions at temperatures of 165.6, 264.2, 359.5 and 446.8° respectively and an exothermic reaction of 446.8 to 1200°. The largest mass loss was 6.12% during heat treatment until 1000°. Wet precipitation synthesis is the simple method to produce HAp from Indonesian natural sources. Variations of heat treatment give effect on phase transformation from amorphous HAp to crystalline HAp.","PeriodicalId":6833,"journal":{"name":"4TH INTERNATIONAL SEMINAR ON CHEMISTRY","volume":"43 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76997671","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Alkali metal doped ZnO nanoclusters for methylene blue photodegradation: Computational studies","authors":"G. R. Anindika, N. I. Oktavianti, A. L. Ivansyah, A. Fadlan, Y. Kusumawati","doi":"10.1063/5.0051754","DOIUrl":"https://doi.org/10.1063/5.0051754","url":null,"abstract":"Several alkali metalss (AM) are doped into ZnO nanoclusters (Zn12O12 NCs) has been studied in geometry optimization, energy and electronic properties by using density functional theory (DFT). It has been proven that adding alkali metal is an effective way to decrease energy gap to 0.985. The minimum energy gap of HOMO-LUMO is Rb-doped ZnO, and the energy gap is 3.040 eV. The Rb-doped Zn12O12 NCs was then tested on MB dye to obtain adsorption energy (Eads). The Eads of -224.7 kcal / mol are obtained from calculations using DFT. The results show the AM doped ZnONCs is a promising application materials in the MB photodegradation.","PeriodicalId":6833,"journal":{"name":"4TH INTERNATIONAL SEMINAR ON CHEMISTRY","volume":"74 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77032301","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Annealing treatment for enhancing of H2/C3H8 separation performance on polysulfone membrane","authors":"I. S. Caralin, A. R. Widyanto, N. Widiastuti, R. Wijiyanti, T. Gunawan, Z. A. Karim, Mikihiro Nomura, Y. Yoshida","doi":"10.1063/5.0052177","DOIUrl":"https://doi.org/10.1063/5.0052177","url":null,"abstract":"Recovery of heavier hydrocarbon gas (i.e. C3H8) from permanent gas (i.e. H2) during gas streams process is a great importance economically. Separation of H2/C3H8 gas using polysulfone (PSF) polymeric membrane was studied with the effect of post-treatment process such as annealing to improve the gas separation performance. PSF membrane annealed using a muffle furnace under vacuum conditions at 150°C for an hour. The result showed that annealing process caused a reduction in the mobility of the polymer chain, which was indicated by a shift of 2θ in XRD results. The cross-section morphology of membrane annealed at 150°C was examined by SEM. Annealing process of PSF membrane enhanced the H2/C3H8 selectivity by 619.77%, from 3.08 to 22.19. It was concluded that post-treatment PSF membrane could improve the H2/C3H8 separation performance compared to PSF membrane without annealing treatment.","PeriodicalId":6833,"journal":{"name":"4TH INTERNATIONAL SEMINAR ON CHEMISTRY","volume":"70 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76031775","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Irradiation grafting of hydrophilic monomer onto chitin","authors":"G. T. Rekso","doi":"10.1063/5.0051827","DOIUrl":"https://doi.org/10.1063/5.0051827","url":null,"abstract":"Studies on radiation grafting of a hydrophilic monomer onto chitin for ion exchange applications were Chitin has been increased attention for its use, such as ion exchange. They are utilized scarcely because of problems with low solubility, hydrophobicity, and reactivity. Irradiation graft copolymerization induced by irradiation is one of the methods for chitin modification to improve its properties such as hydrophobicity and reactivity. This research aims to increase the ability of chitin as ion exchange for the heavy metal adsorbent. The hydrophilic monomers used were acrylic acid and acrylamide. In the present research, the pre-radiation method was used. The irradiation of the sample was carried out in the Co-60 gamma ray irradiation source at room temperature. The monomers solutions acrylic acid or acrylamide than introduce into irradiated chitin, and the graft polymerization was done in an inner condition. The grafting presentation has been determined as a variation of monomer concentration and temperature as a function of the reaction time. The grafted chitin obtained was washing and dried in a vacuum, and the percentage of grafting was measured by the gravimetric method. Measuring the capacity of adsorption of grafted chitin to Cr, Cu, and Hg metal ion was determined by using AAS and CV AAS. The result shows that using acrylamide gives a percentage of grafting higher compare with acrylic acid. The FTIR spectrum demonstrates the presence of monomer grafted onto chitin with the appearance of the carbonyl functional group. Chitin grafted with acrylic acid gives a higher rate of adsorption of metal ion Cr, Cu, and Hg compare grafted with acrylamide. The highest percentage of adsorption is for metal ion Hg. It was found 294 mg/g for chit-g-Aac and 257 mg/g for Chit-g-Aam.,","PeriodicalId":6833,"journal":{"name":"4TH INTERNATIONAL SEMINAR ON CHEMISTRY","volume":"29 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88753749","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Simulation of modified sorghum flour production using Lactobacillus plantarum bacteria","authors":"S. Gunawan, Laura Mahdalena, A. Azhari, H. W. Aparamarta","doi":"10.1063/5.0051593","DOIUrl":"https://doi.org/10.1063/5.0051593","url":null,"abstract":"The value of wheat imports always increases every year, this makes Indonesia a country that is dependent on wheat imports. Efforts to reduce this dependency include the production of modified sorghum flour (Mosof) production using the fermentation process by Lactobacillus plantarum. One ingredient that can be used as a Mosof production material is sorghum (Sorghum bicolor (L.) Moench). Sorghum has great potential to be developed in Indonesia because it is quite tolerant of infertile or critical soils so that less productive land can be planted. However, the use of this plant is still very limited only fo animal feed. In this research, simulation sorghum is used as a substitute for wheat flour. Mosof is a sorghum flour product in which sorghum was processed using the principle of lactic acid fermentation to improve the nutritional content. The methodology of this work were kinetics parameters determination (curve fitting and the 4th order Runge Kutta) and Mosof production simulation (Super Pro Designer 9.5). Kinetic parameter validation was applied using experimental data, where Haldane’s kinetic model gave the best R2 of 0.999811 by using the 4th order Runge Kutta method. Resulting kinetic parameters of µmax, Ks, and Ki were 0.8743 /h, 0.0349 g/L, and 6.7114 g/L, respectively. The optimum yield of lactic acid (0.00779 g/L) was obtained at 96 h and a value a of 0.00008. The values of phytic acid, proteins, starch, tannins, water in Mosof were 0.3%, 13.87%, 84.88%, 0.16%, and 0,76%,respectively.","PeriodicalId":6833,"journal":{"name":"4TH INTERNATIONAL SEMINAR ON CHEMISTRY","volume":"95 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84693801","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Phytochemical and antioxidant activities of Robusta coffee leaves extracts from Alor Island, East Nusa Tenggara","authors":"R. Y. Kurang, R. Y. Kamengon","doi":"10.1063/5.0051835","DOIUrl":"https://doi.org/10.1063/5.0051835","url":null,"abstract":"Coffee is a very promising commodity. Besides being consumed as a famous drink with high caffeine content, coffee also has many compounds that can act as antioxidants. One part of the coffee plant that acts as an antioxidant is the leaf. Robusta coffee (Coffea canephora) is one species of the genus Coffee. The aims of this study were to determined the phytochemical and antioxidant activity on Robusta coffee leaves as seen based on differences in the ecology of the highlands on Alor Island – East Nusa Tenggara. Robusta coffee leaves were extracted by maceration for 24 hours with methanol. DPPH assay was used to determine the antioxidant activity. The result showed that Robusta coffee leaves from Alor Island give the antioxidant activity with IC50 56,337 ppm. Phytochemical analysis revealed that the bioactive compound from Robusta coffee leaves is composed of alkaloids, flavonoids, terpenoids, and phenolic.","PeriodicalId":6833,"journal":{"name":"4TH INTERNATIONAL SEMINAR ON CHEMISTRY","volume":"27 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85361447","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Committees: The 4th International Seminar on Chemistry","authors":"KusumawatiYuly, PurnomoAdi Setyo","doi":"10.1063/12.0005173","DOIUrl":"https://doi.org/10.1063/12.0005173","url":null,"abstract":"","PeriodicalId":6833,"journal":{"name":"4TH INTERNATIONAL SEMINAR ON CHEMISTRY","volume":"16 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89431930","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}