bluuebunny/crossref_metadata_2025_split huggingface dataset:
Structural and Electrical Properties of Glass-Ceramic Ferroelectric Composite Materials
Authors: Tumarkin A. V. , Sapego E. N. , Gagarin A. G. , Tyurnina N. G. , Tyurnina Z. G. , Sinelshchikova O. Yu. , Sviridov S. I. 
Published: June 2022

Introduction. Materials exhibiting high dielectric permittivity are relevant for use in modern ultrahigh-frequency electronics. Among them, ferroelectrics with high dielectric nonlinearity present particular interest. The electrical strength of ferroelectric materials can be increased using modern composite structures based on mixing ferroelectries and linear dielectrics - materials exhibiting simultaneously low dielectric permittivity and high electrical strength. This approach provides for the opportunity of creating new multicomponent materials with previously unattainable properties and adjusting their component composition, inclusion size and electrical properties across a wide range. In this work, on the basis of porous potassium-iron-silicate glass (KFS) obtained by ion exchange, glass-ceramic materials containing barium titanate were synthesized for use at ultrahigh frequencies.Aim. Production of glass composites by low-temperature sintering of pre-synthesized BaTiO3 (BTO) and potassium-iron-silicate glass, as well as characterization of their structural and electrical properties at ultrahigh frequencies (microwave).Materials and methods. The crystal structure and phase composition of the obtained films were studied by X-ray diffraction using a DRON-6 diffractometer by the emission spectral line CuKα1 (λ = 1.5406 Å). The dielectric permittivity (ε) of microwave samples was evaluated by the Nicholson-Ross method at room temperature using an Agilent E4980A LCR-meter.Results. According to X-ray diffraction analysis, the synthesized samples are a mixture of KFS glass, ferroelectric BaTiO3 and dielectric barium polytitanates; the ratio of the latter determines the electrical properties of the composites. Depending on the content of barium titanate, the studied samples demonstrate a dielectric constant from 50 to 270 at a dielectric loss level of 0.1...0.02. The samples subjected to annealing in an oxygen medium showed an increase in dielectric permittivity by 10.25 % and an increase in controllability with a decrease in dielectric losses by an average of two times.Conclusion. The composite composition of 70 wt % BTO /30 wt % KFS was found to be the most promising in terms of structural and electrical properties. This composite showed an increase in dielectric permittivity by 25 % and a significant increase in nonlinearity, at the same time as reducing losses by more than two times as a result of annealing in an oxygen medium.
Price Effectiveness and Product Quality on Purchase Decisions by Printing Companies
Authors: Angreni Tri , Listen Georgius , Hidayat Adrian 
Published: June 2022

The purpose of writing this thesis is to determine the effect of screen-printing paint quality and printing prices on consumer purchasing decisions by printing companies. The study was conducted on 60 respondents through the distribution of questionnaires. The method used in this research is descriptive method and qualitative method. Based on the answers to the questionnaire, raw data has been obtained which is then processed using SPSS version 23 so that it becomes useful data for this research.
In addition to calculating the relationship between the independent variable and the dependent variable, this study also calculated the relationship between variables. The correlation of the effect of paint quality on purchasing decisions is 0.721 the correlation of the effect of price on purchasing decisions is 0.529 and so it can be said that the relationship between the three variables is quite strong, thus Ho is rejected, and Ha is accepted. In the t-test, the results of t-count paint quality are 7.143, t-count prices are 6.896 and t-count when compared with t-table of 2.001 then there is a significant relationship is significant between paint quality and price on purchasing decisions by Printing Companies.
Impact of bulking agents on municipal solid waste refused derived fuel
Authors: Abidi SH , Syed QA , Iqbal MK , Butt T 
Published: June 2022

The main objective of this study is to investigate how the bulking agents (BA) effect on municipal solid waste (MSW) moisture contents and refused derived fuel (RDF) pellets bulk density (BD), durability (DU) and hardness. In this experiment applied sugar cane trash, rice husk and cotton waste bulking agents each at 15%, 25%, 35% and 45% to reduce the moisture contents of MSW for RDF pellet development. Sugar cane trash was prominent in moisture reduction capability in 10 days than others BA. MSW and sugar cane trash mixture, RDF pellets pertained maximum BD (1.58 g/cm3), DU (99%) and hardness (27kg) were developed with compaction process, die diameter 8inch and 120◦C. It was also observed smoke appeared at 150◦C during pelting process due to burning of biomass. Furthermore bulking agents had also revealed effectiveness in BD, DU, hardness results as the quantity of BA increased. It was concluded that BA are suitable for moisture reduction and RDF pellet development, can be sued as an alternative energy fuel.
Bangladesh J. Sci. Ind. Res. 57(2), 77-84, 2022
Microwave assisted co-operative dynamics and structural variations in chlorobenzene-acetonitrile solutions
Authors: Birajdar SS , Gaikwad JW , Suryawanshi DB 
Published: June 2022

Molecular interactions between CBZ-ACN at 8.845 GHz of microwave frequency region confer structural behavior of molecules such that either monomers or multimers are present in the agreed binary mixtures. Effect of microwave frequency on molecular interactions and hydrogen bonding between C≡N (nitrile) molecule and Cl (chlorine) molecule of CBZ and ACN binary solutions has been studied using X-band microwave technique at 301ºK. Co-operative dynamics and hydrogen bonding between nitrile and chlorine group molecules has been thoroughly explicated thereby obtaining static dielectric constant, excess permittivity, Kirkwood correlation factor using Luzar model and Bruggeman factor.
Bangladesh J. Sci. Ind. Res. 57(2), 85-90, 2022
Improvement of bovine pregnancy rate through intravaginal biostimulation with penis like device
Authors: Biswas S , Swarna M , Paul AK 
Published: June 2022

The aim of this study was to increase bovine pregnancy rate by intra-vaginal biostimulation penis like device (PLD). A total of 336 heifers/cows were AI, in which PLD was used in 193 animals. Animals were grouped as A (only AI) and B (PLD after AI). The overall pregnancy rate was 70.0%. Pregnancy rate in group B was significantly (P=0.004) higher than that of group A. Cows of >7.5 years old is showed lower pregnancy rate in group A, but higher in group B. The heifers were showed more responsive to PLD than others parity. The parity 5 or more in group B was responded to PLD and showed higher pregnancy rate than that of group A. It was found that age was significantly positive correlation parity whereas significantly negative correlation with breed. It is concluded that PLD will increased the pregnancy rate of cows through biostimulation on vagina.
Bangladesh J. Sci. Ind. Res. 57(2), 101-108, 2022
EFEKTIVITAS KULIT BAWANG MERAH (Allium ascalonicum) TERHADAP PERTUMBUHAN PAKCOY (Brassica rapa)
Authors: Putri Yosi Dwi Ananda , Kurniasih Surti , Munarti . 
Published: June 2022

Mustard production in indonesia from 2017 to 2019 had been decreasing year by year, while market demanded for vegetable production had increased. On the other handed, shallot production in 2017 to 2019 increased, resulting in an abundance of shallot waste. Natural resources in the form of organic materials and organic waste that exist around farmers and the community in general could been made as organic fertilizer. Based on this, it was necessary to studied the effectiveness of liquid organic fertilizer (poc) of onion peel waste on the growth of pakcoy plants. The purpose of this studied was to studied the effect of onion peel waste on the growth of pakcoy. This studied used an experimental method with a completely randomized design (crd) consisting of 5 treatments and each treatment consisted of 5 replications, so the total number of experimental units was 25 experimental units. The concentration given to each treatment was p0 (0%), p1 ( 20%), p2 (40%), p3 (60%) and p4 (80%). Growth parameters observed was number of left, plant height and wet weight. The results showed that the administration of red onion peel waste had a significant effect on the growth of pakcoy on the three parameters observed. The optimal treatment for the number of left was p1(20%), plant height p3 (60%) and wet weight p1(20%) Keywords: Liquid Organic Fertilizer, Pakcoy, Shallots
UJI AKTIVITAS EKSTRAK ETANOL KOMBINASI DAUN PANDAN WANGI DAN DAUN JAMBU BIJI TERHADAP Shigella dysenteriae
Authors: Komala Oom , Abd.Nf Durrotun Nafisah , Utami Novi Fajar 
Published: June 2022

Dysentery can be treated using Pandanus amarylifolius leaves and Psidium guajava leaves. This study aimed to determine the activity of the combination of 96% ethanol extract of P. amarylifolius leaves and P. guajava leaves in inhibiting the growth of Shigella dysenteriae bacteria. Methods. Extraction of P. amarylifolius leaves and P. guajava leaves respectively by using the maceration method with 96% ethanol solvent. For the combination treatment, each of these extracts was combined. Each extract obtained was tested for minimum inhibitory concentration (MIC). The MIC value of P. amarylifolius leaf extract was obtained at a concentration of 30% and P. guajava leaf extract was obtained at a concentration of 40%. Inhibitory width test (IWT) by disc diffusion method was carried out on single extracts and combination extracts, with treatment concentrations of 30% single extract of P. amarylifolius leaf (K1), 40% single extract of P. guajava leaf (K2), combination 1 (P. amarylifolius leaf). 30%+ P. guajava leaf 40%) (K3), combination 2 (35% P. amarylifolius leaf + 40% P. guajava leaf) (K4), combination 3 (40% P. amarylifolius leaf + 40% P. guajava leaf) (K5). The width of the inhibition of the research results of the treatment against S. dysenteriae were analyzed using a completely randomized design and Duncan's test. The results showed that the combination of P. amarylifolius leaf extract and P. guajava leaf was more effective in inhibiting the growth of S. dysenteriae bacteria. The combination of P. amarylifolius leaf extract and P. guajava leaf extract that was most effective in inhibiting the growth of S. dysenteriae bacteria was combination 3 (40% P. amarylifolius leaf extract + 40% P. guajava leaf extract) with an average inhibitory width of 5.625 mm. Keywords: Combination, P. amarylifolius Leaves, P.guajava Leaves, S. dysenteriae
KERAGAMAN TUMBUHAN INVASIF DI HUTAN PENELITIAN DRAMAGA BOGOR
Authors: Priyono Purwohadi Purbo , Ismanto . , Susilo Adi 
Published: June 2022

Invasive Plant is species that dominate an area or places, both are native species and non-native species. Invasive Plants is one of the crucial problems in ecosystem management because it is a major component of global environmental change, threats to biodiversity and local species, as well as, causes of changes in nutrient cycles, fire cycles, hydrological cycles, and energy balance. The purpose of this study is to prove that plants far from the road are more commonly invaded by invasive species and that physical and biological factors affect the growth of invasive species. The research was conducted at the Dramaga Research Forest, Bogor from June 2020 to August 2020. This study used a vegetation analysis method, which is using nesting plots that have a size of 2 x 2 m for seedlings, 5 x 5 m for saplings, 10 x 10 m for poles, and 20 x 20 m for trees. Plots were made in two locations, close to the road and far from the road. The location close to the road was 5 - 10 meters, and far from the road was 70 - 80 meters The total plots made in this study were 16 plots in each size. The results showed that the highest diversity was found at the level of seedlings, namely medium status (2.00-3.00) according to the Shannon-Wiener index. The results showed that the statistical analysis of the diversity of weeds in the Dramaga Research Forest were not significantly different, between plants close to the road and plants far from the road. This is causing by physical factors that are not significantly different based on statistical tests. The growth of invasive plant species is influenced by several factors, such as light intensity, temperature, humidity, and soil pH. Keywords: Dramaga Research Forest Bogor, Invasive species, Vegetation analysis
PENENTUAN LOKASI BASIS DAN NON BASIS PENYEBARAN VIRUS CORONA (COVID-19) MENGGUNAKAN METODE LOCATION QUOTIENT (LQ)
Authors: Iswanto Toto , Widyastiti Maya 
Published: June 2022

The corona virus pandemic that has hit the entire world is a threat to the order of people’s lives in all field so it must be solved quickly. This study aims to determine the location of the Basic and non-Basic of the spread of corona virus in Lubuk Besar district, Province of Bangka Belitung Island. Data used is this study are the number of population and the number of COVID-19 cases in Lubuk Besar district, Bangka Belitung Province. This research is a descriptive type of research with a quantitative approach using the Location Quotient Method. The results showed that in January 2021 there are 4 villages that became the basis location for the spread of the corona virus, i.e. Kulur Village with LQ value is 1.634581, Kulur Ilir Village with LQ value is 1.618289, Lubuk Besar Village with LQ value is 1.914148, and Perlang Village with LQ value is 1.412130, and the other villages are non-basic. In February 2021 the villages that became the basis are Kulur Ilir Village with LQ value is 1.182939, Perlang Village with LQ value is 1.376094, and Trubus Village with LQ value is 2.996931, and the other villages are non-basic location. In March 2021, Perlang Village with LQ value is 1.184505 and Trubus Village with LQ value is 5.600585 became the basis for the spread of the corona virus, and the other villages are non-basic location.
OPTIMALISASI TOTAL PENDAPATAN DENGAN PENGAPLIKASIAN MODEL PEMROGRAMAN NON LINIER DALAM PENENTUAN HARGA JUAL DAN PERMINTAAN PRODUKSI TEMPE
Authors: Ramdhani Abdurachman , Wijayanti Hagni , Sumarsa Amar 
Published: June 2022

HJ tempeh factory in Ciluar Bogor is a company engaged in the tempeh production industry that produces several variants of tempeh products. Product variants include tempeh of sizes 18 cm x 30 cm, 18 cm x 25 cm, 20 cm x 25 cm, 17 cm x 25 cm, and mendoan tempeh of size 8 cm x 14 cm. The raw materials used for the production of each variant are soybeans and tempeh yeast. Due to limited raw materials to produce these variants, it is important for the company to determine optimum selling price as well as number of demands in seeking to obtain optimum revenue. Non-linear programming is used to determine the selling price and production demand of each tempeh product variant in order to optimize the total revenue. This study recommends the factory to generate daily sale of each tempeh variants as follows: 222 packs of tempeh sized 18 cm x 30 cm at Rp 8,299.00; 111 packs of tempeh sized 18 cm x 25 cm at Rp 5,698.00; 65 packs of tempeh sized 20 cm x 25 cm at Rp 6,826.00; 87 packs of tempeh sized 17 cm x 25 cm at Rp 4,805.00; and 833 packs of mendoan tempeh sized 8 cm x 14 cm at Rp 396.00. By using this scheme, total daily income to be gained is Rp 3,676,612.00.Keywords: tempe product variant, elasticity value, non-linear programming, optimization, determination of selling price.
EKSTRAK ETANOL BUAH STROBERI (Fragaria x ananassa Duchesne ex Rozier) SEBAGAI INHIBITOR TYROSINASE
Authors: . Widyastuti , Primagara Edo 
Published: June 2022

ABSTRAK Manusia mempunyai warna kulit yang berbeda akibat perbedaan jumlah melanin. Proses pembentukan melanin terjadi akibat sejumlah enzim, hormon, oksigen, mineral, serta sinar ultraviolet. Kelebihan jumlah melanin dapat menyebabkan terjadinya hiperpigmentasi yang dapat merusak penampilan dari kulit. Penggunaaan bahan pencerah kulit sintetis dapat membahayakan kulit. Penelitian bahan-bahan pencerah kulit dari alam terus dilakukan karena efek samping bahan kimia yang berbahaya bagi kulit. Buah stroberi merupakan suatu antioksidan. Penelitian ini mencoba menguji aktivitas tabir surya dan inhibitor tirosinase secara in vitro dari ekstrak etanol buah stroberi segar dengan menggunakan metode spektrofotometer. Dari penelitian yang dilakukan menunjukkan bahwa ekstrak etanol buah stroberi mengandung metabolit sekunder flavonoid, senyawa fenolik dan saponin. Pada konsentrasi ekstrak 1mg/mL diperoleh kandungan senyawa fenolik total 1755 mg GAE/100 gram ekstrak dengan kapasitas antioksidan sebesar 6,23%. Pada konsentrasi ekstrak 0,6 mg/mL telah didapatkan nilai SPF lebih dari 15 yaitu 26,853. Aktivitas inhibisi tirosinase diperoleh nilai IC50 sebesar 662,096 μg/mL. Ekstrak etanol buah stroberi memiliki potensi sebagai tabir surya dan inhibitor tirosinase.. ABSTRACT Humans have different skin colors due to different amounts of melanin. The process of melanin formation occurs due to a number of enzymes, hormones, oxygen, minerals, and ultraviolet light. Excess amount of melanin can cause hyperpigmentation which can impair the appearance of the skin. Using synthetic leather brighteners can harm your skin. Research on skin lightening ingredients from nature continued because of the side effects of chemicals that are harmful to the skin. Strawberry fruit is an antioxidant. This study tried to test the activity of sunscreens and tyrosinase inhibitors in vitro from ethanol extracts of fresh strawberries. Research shows that ethanol extracts of strawberries contain secondary metabolites of flavonoids, phenolic compounds, and saponins. In the extract concentration of 1 mg/ml obtained a total phenolic compound of 1755 mg GAE/100 g extract and antioxidant capacity of 6.23%. SPF value of strawberry extract of more than 15 found at a concentration of 0.6 mg/ml extract was 26.853. The tyrosinase enzyme inhibitory activity of ethanol extract of strawberries obtained IC50 values of 662.096 μg/ml. Ethanol extract of strawberry fruit has the potential as a sunscreen and tyrosinase inhibitor.
FORMULASI DAN UJI AKTIVITAS GEL EKSTRAK DAUN JERUK MANIS (Citrus x aurantium L.) TERHADAP BAKTERI Propionibacterium acnes
Authors: Hindun Siti , Najihudin Aji , Hamdani Siva , Sriarumtias Framesti Frisma , Abdullah Fajar Fauzi 
Published: June 2022

Jerawat merupakan penyakit kulit yang menyerang lebih dari 85% kalangan remaja di seluruh dunia. Penyebab terjadinya jerawat yaitu bakteri Propionibacterium acnes (P. acnes). Tujuan dari penelitian eksperimental ini yakni untuk membuat formulasi dan menganalisis aktivitas gel ekstrak daun jeruk manis terhadap bakteri P. acnes. Ekstrak daun jeruk manis diekstraksi kemudian dilakukan formulasi gel menggunakan gelling agent karbopol dengan berbagai konsentrasi 0,5%, 1%, 1,5%, dan 2%. Selanjutnya, dilakukan uji kestabilan dan aktivitas terhadap bakteri Propionibacterium acnes menggunakan metode difusi cakram. Hasil uji stabilitas sediaan menunjukkan bahwa formulasi gel dengan karbopol 2% dan konsentrasi ekstrak 20% merupakan yang paling stabil dibanding formulasi lainnya serta memiliki aktivitas daya hambat terhadap bakteri P. acnes kategori lemah dengan zona hambat 1,8 mm. Berdasarkan hasil dari penelitian ini, sediaan gel ekstrak daun jeruk manis memiliki aktivitas daya hambat terhadap bakteri P. acnes penyebab jerawat. Lebih jauh, tanaman ini dapat digunakan sebagai alternatif pengobatan untuk mengatasi jerawat.
AKTIVITAS ANTIBAKTERI DESINFEKTAN BERBAHAN DASAR ASAP CAIR CANGKANG KELAPA SAWIT TERHADAP BAKTERI STAPHYLOCOCCUS AUREUS
Authors: Rosmainar Lilis , Karelius Karelius , Toemon Angeline Novia 
Published: June 2022

Cangkang kelapa sawit merupakan limbah pengolahan kelapa sawit yang dapat digunakan untuk menghasilkan asap cair. Asap cair dapat digunakan sebagai pengawet, antibakteri terutama mengandung asam asetat dan fenol. Tujuan dari penelitian ini adalah menguji efektivitas antibakteri desinfektan berbahan dasar asap cair pada berbagai konsentrasiterhadap pertumbuhan bakteri Staphylococcus aureus. Pembuatan asap cair dilakukan melalui proses torefaksi dengan pemberian gas nitrogen sehingga menghasilkan asap cair dari cangkang kelapa sawit yang berwarna kehitaman yang mengandung senyawa fenol, asam propanoat, 2-propanon, 1,2-benzendiol, 2-furankarbokaldehid, dan asam asetat. Asap cair hasil torefaksi kemudian didestilasi sehingga menghasilkan warna coklat yang kemudian dianalisis menggunakan GC-MS dengan kandungan senyawa fenol, asam propanoat, 2 propana, dan asam asetat. Desinfektan berbahan dasar asap cair dibuat dengan berbagai konsentrasi yaitu 12,5%, 25%, dan 50% diuji terhadap bakteri S.aureus. Pada uji antibakteri desinfektan berbahan asap cair dengan berbagai konsentrasi tidak ditemukan adanya pertumbuhan bakteri S.aureus.Hal ini menunjukkan bahwa desinfektan berbahan dasar asap cair efektif dalam menghambat bakteri S.aureus.
EKSTRAKSI FLAVONOID DAUN MENIRAN MENGGUNAKAN PELARUT NATURAL DEEP EUTECTIC SOLVENT BERBASIS KOLIN KLORIDA-ASAM DENGAN ULTRASOUND ASSISTED EXTRACTION
Authors: . Yulianita , Rusli Zaldy , Suhendar Usep , Masrani Zulfa 
Published: June 2022

Penggunaan pelarut organik masih umum digunakan untuk menarik senyawa aktif, diantaranya adalah flavonoid yang berperan dalam kesehatan manusia sebagai antioksidan, antikanker, dan antidepresan. Akan tetapi, penggunaan pelarut organik sebenarnya berbahaya bagi kesehatan, karena dapat mempengaruhi sistem saraf pusat dan perifer, sistem reproduksi, menginduksi kanker, dan lain-lain. Penelitian ini bertujuan untuk menentukan pelarut terbaik dari beberapa kombinasi Natural Deep Eutectic Solvent (NADES) dan metode ekstraksi daun meniran terhadap kadar flavonoid.Pengujian kadar flavonoid dilakukan dengan metode penambahan AlCl3. Hasil penelitian diperoleh kadar flavonoid terbaik pada pelarut NADES 2 yaitu kombinasi Kolin Klorida-Asam Oksalat dengan kondisi ekstraksi optimum pada suhu 48oC, waktu 60 menit dan rasio pelarut NADES:Air 90% sebesai 1,4161% . Berdasarkan penelitian ini, diketahui bahwa ekstraksi menggunakan pelarut NADES tersebut lebih baik dibandingkan metode konvensional dan kombinasi pelarut NADES lainnya.