bluuebunny/crossref_metadata_2025 huggingface dataset:
Pemberian Edukasi Mengenai Pemeriksaan Payudara Sendiri Terhadap Perilaku Deteksi Dini Kanker Payudara Pada Wanita Usia Subur
Authors: Rohmah Fatkhur , Safriana Rizka Esty
Published: August 2024

ABSTRACT
Breast cancer is the growth of breast cells uncontrolled due to abnormal changes. In East Java breast cancer ranked first in female killers, this is due to a lack of public knowledge about BSE as an early prevention effort. Objective. The purpose of this research is to provide education regarding examinations own breasts (BSE) on early breast cancer detection behavior in Women of Childbearing Age (WUS) in Sukomulyo Gresik Village. The type of research is quantitative, the design used is quasi experiment with a one group pre and post test design. Technique The collection used total sampling with a sample size of 48 respondents.
This research uses instruments in the form of questionnaires and checklist sheets. The analysis used is the paired simple t test. From the results of research using the paired simple t test with a p value of 0.000<0.05, where this shows that H1 is accepted and H0 is rejected. The conclusion is that there are differences in knowledge, attitudes and behavior among WUS after being given education about BSE with a p value of 0.000.

 

 
ABSTRAK
Kanker payudara merupakan pertumbuhan sel payudara yang tidak terkontrol karena perubahan abnormal. Di Jawa Timur kanker payudara menduduki peringkat pertama pembunuh wanita, hal ini akibat kurangnya pengetahuan masyarakat tentang SADARI sebagai upaya pencegahan dini. Tujuan dari penelitian ini adalah untuk memberikan edukasi mengenai pemeriksaan payudara sendiri (SADARI) terhadap perilaku deteksi dini kanker payudara pada Wanita Usia Subur (WUS) di Desa Sukomulyo Gresik. Jenis penelitian adalah kuantitatif, desain yang digunakan quasi eksperiment dengan rancangan one group pre and post test design. Teknik pengambilan menggunakan total sampling dengan jumlah sampel 48 responden. Penelitian ini menggunakan instrument berupa kuesioner dan lembar checklist. Analisis yang digunakan yaitu uji paired simple t test. Dari hasil penelitian menggunakan uji paired simple t test dengan didapatkan nilai p value 0.000<0.05, dimana hal tersebut menunjukkan bahwa H1 diterima dan H0 ditolak. Kesimpulannya adalah terdapat perbedaan pengetahuan,sikap, dan perilaku pada WUS setelah diberikan edukasi mengenai SADARI dengan nilai p value 0,000.
Analisa Kecelakaan Kerja pada Proyek Pembangunan Gardu Induk JIIPE Menggunakan Metode Hazop
Authors: Trianditanaka Muhammad , Prafitasiwi Avisha Gita
Published: August 2024

Risiko adalah ukuran kemungkinan kerugian keselamatan umum yang disebabkan oleh sumber bahaya tertentu yang terjadi pada pekerjaan konstruksi. Untuk mengidentifikasi risiko, data dikumpulkan melalui pengambilan sampling purposive dan snowball untuk memperoleh variable yang relevan dari kuesioner pendahuluan yang dibagikan pada ekspertise. Dalam penelitian ini, metode HAZOP digunakan untuk melakukan identifikasi risiko secara sistematis dan terstruktur. Tujuan dari metode ini adalah untuk menentukan risiko apa yang paling dominan dari proyek yang ditinjau dan untuk memberikan upaya pengendalian risiko mengacu pada Hirarki Pengendalian Bahaya. Hasil dari penelitian ini adalah pekerjaan pengecoran pada sumber bahaya tangan terkena campuran material dan risikonya iritasi pada kulit, pekerjaan pengecoran pada sumber bahaya kaki terkena campuran material dan risikonya iritasi pada kulit, pekerjaan erection pada sumber bahaya pekerja terjatuh dari ketinggian dan risikonya pekerja mengalami luka serius bahkan menyebabkan kematian, pada pekerjaan erection pada sumber bahaya alat ambruk karena kelebihan beban dan risikonya pekerja mengalami luka berat akibat tertimpa, pekerjaan erection pada sumber bahaya sling mobile crane putus dan risikonya pekerja memgalami luka berat tertimpa material yang diangkat oleh mobile crane terjatuh. Upaya pengendalian bahaya menurut hirarki pengendalian bahaya yaitu subtitusi, perancangan, administrasi, dan APD.
Synthesis of Binuclear Complex Compound of {[Fe(L)(NCS)Â¬2]2oks} (L = 1,10-phenantrolin and 2,2â€™-bypiridine)
Authors: Male Yusthinus T , Tehubijuluw Helna , Pelata Paulina M.
Published: August 2024

The paramagnetic complex {[Fe(fen)(NCS)2]2oks} have been synthesized in methanol solution using 1-10 phenantrolin, 2,2 '-bipyridine, NCS- ligands and oxalate as bridging ligand. Synthesis of Fe (II) with ligands phenantrolin produced three complexes is paramagnetic compounds each with a value of magnetic moment (Î¼) of 5.98 BM, 7.34 BM and 6.00 BM, respectively. For complexes with bipyridine ligand complexes obtained two diamagnetic compounds with the magnetic moment (Î¼) was 3.57 BM and 3.50 BM, respectively. It could concluded that the field strength of bipyridine ligand cannot be reduced by NCS- ligand. Analysis results showing that the synthesized compound is a binuclear complex with {[Fe(fen)(NCS)2]2oks} molecular formula. This conclusion was supported by the measurement of conductivity, magnetic moment, IR spectroscopy and XRD analysis.
Application Of Spons Callispongia Sp Origin Of Halong Water (Ambon Bay) As Biomonitoring Contamination Trace Metals Pb,Cr,Cr And Zn
Authors: Siahaya Antho Netty , Noor Alfian , Soekamto Nunuk H.
Published: August 2024

The purpose of research it is cycles how knowing cycle trace metals Pb, Cd, Cr and Zn in Callispongia Sp, sediment and water. Techniques of the analysis of trace metals use ICP-OES ((Inductively Coupled Plasma Optical Emission Spectroscopy). Analysis dramatic of the relationship between sponge significant sediment  and water show that highest trace metal is Zn to Callispongia sp (6.250 mg/kg dry weight), sediment (0.750 ppm and water 0.790 ppm)
Extraction And Identification Of Sulfated Polysaccharide From Gracilaria sp.
Authors: Malle Dominggus , Fransina Eirene G. , Jansen Feky
Published: August 2024

Polysaccharide from Gracilaria sp (locally known as â€œSayur Karangâ€) was extracted using hot alkaline solutions (NaOH and KOH). Fractionation using DEAE-Sepharose Fast Flow column showed that the polysaccharide discharged after being eluted with 0.5 â€“ 1.0 M NaCl. Spectroscopic analysis using FTIR showed that the polysaccharide contained hydroxyl  (3420 cm-1 (NaOH frcation) dan 3446 cm-1 (KOH frcation)), carbonyl (1642 cm-1 (NaOH frcation) and 1644 cm-1 (KOH frcation)) and sulphate (1271 cm-1 (NaOH frcation) and 1262 cm-1 (KOH frcation)) groups proving that the polysaccharide is a sulphated polysaccharide. A further study is needed to elucidate the structure of the sulphated polysaccharide as well as physiochemical properties of the polysaccharide.
Synthesis Of 1-phenyl-4-(3â€™, 4â€™-dimethoxy phenyl)-1-Buten-3-on From Eugenol
Authors: Tahya Candra Y. , Sohilait Hanoch J. , Sekewael Serly J.
Published: August 2024

The synthesis of 1-phenyl-4-(3â€™, 4â€™-dimethoxy phenyl)-1-buten-3-one from eugenol has been done through four
reaction steps. The metilation of eugenol with dimethyl sulphate yields 81.81% of methyl eugenol.
Oxymercuration-demercuration of methyl eugenol with mercury acetate yields 67.27% of methyl eugenyl
alcohol. Oxidation of methyl eugenyl alcohol with pyridinium chloro chromate (PCC) yields 45.31% of methyl
eugenyl ketone. Aldol condensation reaction of methyl eugenyl ketone with benzaldehide catalyzed by potasium
hydroxyde yields 7.38% of 1-phenyl4-(3â€™,4â€™-dimethoxyphenyl)-1-buten-3-one. The purity of compounds was
tested by GC and LC. The Elucidation of structure was analyzed by FTIR, GC-MS, LC-ESI-MS, and
H-NMR.
Isolation and Characterization of Papain From The Latex of Papaya (Carica papaya L)
Authors: Malle Dominggus , Tellusa Ivonne , Lasamahu Astrid A.
Published: August 2024

The papain enzyme was isolated from the latex of papaya and it was purified by ammonium sulfat fractionation and dialysis methods. Determination of papain enzyme activity showed that the highest activity was found in the 80% fraction with a specific activity of 10.5797 x 105 U/g. Papain concentration after Bradford method was 53 mg/mL. Molecular mass of papain was detected to be 21.6 kDa after SDS-PAGE analysis. Characterization of papain showed that the optimum activity of papain was found at pH 8.0 with a specific activity of 14.07031 x 10 U/g, and at temperature 60 Â°C with a specific activity of 14.39755 x 10 U/g.
Effect of Tamarind (Tamarindus indica L.) Extract To Histamine Content In Bullet Tuna (Auxis rochei)
Authors: Hattu Nikmans , Latupeirissa Jolantje , Latupeirissa Astrid
Published: August 2024

The research to determine histamine content in bullet of tuna (Auxis rochei) with variation of tamarind (Tamarindus indica L.) extract concentrations and time of marinate has been done. The histamine content is determined quantitatively by using ultraviolet-visible spectrophotometer with the calibration curve method. The result showed that histamine content in bullet tuna marinated in tamarind extract with varied concentrations of 5%, 10%, 15%, and 20% within 10 minutes, are 37.4561, 35.3041, 23.8778, and 22.1186 mg/100 g respectively. While, the concentrations of histamine in bullet tuna marinated in 20% of tamarind extract with variation of 10, 20, 30, 40, and 50 minutes, are 22.2965, 19.7544, 17.6925, 11.5865, and 8.0396 mg/100 g respectively. A qualitatively, visual comparison of colour intensity of samples with reference colour scale of the standard solution concentration can be used to determine concentrations of histamine without the aid of a spectrophotometer.
Pengaruh Asam Cuka Terhadap Kandungan Histamin Dalam Daging Ikan Komu (Auxis rochei)
Authors: Hattu Nikmans , Fransina Eirene G. , Seumahu Cecelia A. , Sopacua Josina
Published: August 2024

The research on the effect of vinegar to histamine content in bullet tuna (Auxis rochei) has been done. Histamine content of quantitatively determined using a standard curve regression equation (y = 0.005 x - 0.046) with a price coefficient of determination  (R2 =  0.926)  is  close  to  unity.  The  results  showed  levels  of histamine in bullet tuna marinated in vinegar with variation concentrations of 5%, 10%, 15%, 20%, and 25% within 10 minutes, are 25.9099; 20.0408; 18.9671; 18.7108  and 18.6336  mg/100g  respectively.  While the  levels  of histamine  in bullet tuna marinated in 25% of vinegar with variation of 10 minutes, 20 minutes, and 30 minutes, are 18.6336; 16.0550; and 15.5246 mg/100g respectively.
Sintesis Fenetil (O-asetil-p-kumaroil) dari Asam p-kumarat melalui Asetilasi, Klorinasi dan Esterifikasi dengan Fenetilalkohol
Authors: Bahja Bahja , Firdaus Firdaus , Soekamto Nunuk H.
Published: August 2024

Synthesis of phenethyl (O-acetyl-p-coumaroyl) (4) from p-coumaric acid (1) using phenethylalcohol was succesfully conducted via acetylation (2), chlorination (3), and esterification (4). The acetylation was performed using acetic anhydride in pyridine at room temperature for 6 hours, the chlorination was performed using thionyl chloride in dry benzene by reflux at 75oC for 4 hours, continued with esterification by in situ using phenethylalcohol in dry dichloromethane at room temperature for 4 hours. The structure of each step reaction product was identiï¬ed using FT-IR spectroscopy. The compound 2 was obtained as yellowish crystal with m.p 201-203oC and the compound 4 was obtained as white crystal with m.p 68-69oC.
Biosintesis Nanopartikel Perak menggunakan Ekstrak Daun Ketapang, Modifikasi dengan Asam p-kumarat untuk Aplikasi Deteksi Melamin
Authors: Rusnaenah Andi , Zakir Muhammad , Budi Prastawa
Published: August 2024

Biosynthesis of silver nanoparticles (AgNPs) using ketapang leaf extract, modification with p-coumaric acid for detecting melamine has conducted. This research aimed to synthesize AgNPs via bio-reduction method using ketapang leaf extract followed by modification with p-coumaric acid (APK), and evaluating its application detecting melamine. The AgNPs were characterized through ultraviolet-visible absorption spectroscopy (UV-Vis) and X-ray diffraction (XRD). Observation suggested that an increase of incubation time had affected its surface Plasmon resonance trend. Further analysis of crystallite via XRD suggested that nanoparticle size at 43 nm estimated using Debye-Scherer, within the form of unit cells is cubic. The performance of product as melamine detector suggested that the AgNPs-APK had detected melamine in range of concentration from 0.1 to 1000 ppm.
Uji Fitokimia dan Toksisitas Ekstrak Etil Asetat Kulit Batang Melochia umbellata (Houtt) Stapf. var. Visenia dengan Metode Brine Shirmp Lethality Test (BSLT)
Authors: Ahmad Fauziah , Soekamto Nunuk H. , Firdaus Firdaus
Published: August 2024

Melochia umbellata (Houtt) Stapf. var. Visenia is plant species included in Malvaceae family. This spesies is known as paliasa and used as traditional medicine by the people of South Sulawesi. This study aimed to determine the secondary metabolites by reagents and toxicity characteristic testing from bark extract of Melochia umbellata (Houtt) Stapf. var. Visenia using Brine Shirmp Lethality Test (BSLT) method. The extract was prepeared by maceration ethyl acetate. Phytochemical test result showed that the ethyl acetate extract was containing the steroid compound, alkaloids and terpenoids. Toxicity test performed by shrimp Artemia salina Leach larvae was at 48 hours. The toxic effects of the extract were identified by the percentage of the number of shrimp larvae mortality using probit value analysis (LC50). The toxicity test of bark Melochia umbellata (Houtt) Stapf. var. Visenia extract showed that the ethyl acetate extract is toxic to A. salina  LC50 = 54,55 mg / mL.
Fotodegradasi High Density Polyethylene Yang Mengandung Aditif Okso-Biodegradasi
Authors: Asriza Ristika O. , Pitulima Janiar
Published: August 2024

High Density Polyethylene (HDPE) is a type of plastic that widely used for packaging because it has good mechanical properties. HDPE is naturally non-biodegradable, and  the consequence it will increase plastic waste that will damage the environment. To increase their biodegradability, it is necessary to add an oxo-biodegradation additive in the form of a stearate metal compound. This oxo-biodegradation additive is a chromophore that can absorb UV light. Polyethylene oxo-biodegradation films are prepared by mixing HDPE and cobalt stearate to homogeneous on various compositions. To know the effect of adding cobalt stearate into HDPE has done by photodegradation  process. The polyethylene oxo-biodegradation film was given irradiation using UV light in the wavelength range 280-300 nm at room temperature for 10 days. After irradiation, in the ATR spectrum shows an absorption  peak at 1712 cm-1 wavenumber indicatied  the presence of a carbonyl group with a stronger intensity. The higher concentration of cobalt stearate added in HDPE, increases the peak intensity of carbonyl group. This is due to the increasing number of chromophores from cobalt stearate that can absorb UV light, the faster the breakdown of HDPE chains into small fragments so that HDPE is rapidly degraded in nature.
Imobilisasi Enzim Lipase Dedak Padi (Oryza Sativa L.) Pada Karbon Aktif: Karakterisasi, dan Uji Stabilitas Kerja Enzim Imobil
Authors: Firdaus Firdaus , Dali Seniwati , Rusman Hendra J.
Published: August 2024

This research aims to immobilization; characterize the enzyme of immobilized, test the effectiveness of the enzyme of immobilized. This research begins with the immobilization to process of enzyme lipase using activated carbon matrix, enzyme characterization covering of immobile determination of temperature and pH optimum of the enzyme of immobilized, as well as test the stability of work covering immobilized of enzyme the test thermal stability and repeated use. The results showed that the immobile of enzyme work optimally at 50oC of temperature and pH 6.5 with each activity 0.040 U/mL; research results also showed that the immobile of enzyme has higher thermal stability in comparison with the free enzyme: with the relative activity of 57.50% at the time of 45 minutes of exposure and the exposure time at 47.50% at 75-105 minutes and it can be used as many as six times with the relative activity of 52.5% in 6 times of use.
Pemodelan Regresi Berganda Pada Pemanfaatan Tanah Liat Dan Batu Karang Sebagai Adsorben Dalam Pengolahan Greywater
Authors: Dho Tawa Bibiana , Kale Alfius R. , Hadijah Salim Siti , E. Selan Odi Th.
Published: August 2024

The aims of this research are to determine the adsorbent properties, the effect of flow rate and ratio of adsorbent in lowering COD, turbidity, pH levels, and to determine the effect of flow rate interaction and adsorbent ratio in decreasing COD, turbidity and pH levels. This research was conducted with Completed Random Design (CRD) 23 consisting of 2 independent variables namely flow rate (0.2; 0.5; and 0,7 mL/s) and ratio of adsorbent (w/w) of clay : coral (1:1; 1:2; and 2:1) with 3 times replications. The result of the test of the adsorbent properties showed that the clay has hihger acidity and surface area then coral reef, and the coral content of coral reefs is 38.65 %. The flow rate and the ratio of adsorbent based on results of the study also reinforced by the ANOVA test give effect on the levels of COD and turbidity while the interaction of this two variables have an effect on the COD content. The best treatment based on Duncan Multiple Range Test (DMRT) was at 0.7 mL/s flow rate with a 1:1 adsorbent ratio. The multiple regression model for this study is Y =160.3 â€“ 171.17X1 -188.83X2 + 31.67X1X2 + 146.67X12 + 66.67X22.
Pengaruh Pemanasan Basah Dengan Autoklaf Terhadap Aktifitas Senyawa Toxalbumin Pada Biji Kemiri (Aleurites moluccana (L.) Willd)
Authors: Mamang Mamang , Bilang Mariyati , Salengke Salengke
Published: August 2024

In addition to nutritional and non-nutritional content, candlenut also contains toxalbumin, toxic compound that can inhibit protein synthesis. This study aims to inhibit toxalbumin activity in candlenut through moist heating treatment, using hemagglutination method. Defatted candlenut powder was being treated under moist heating using autoclave at the temperature of 121oC for 5,10, 15 and 20 minutes followed by oven heating at the temperature of 70oC for 7 hours and control, continued by dry heating using oven at the temperature of 70oC for 7 hours and extraction using 0.15 M NaCl at room temperature then precipitated using ammonium suplhate (60%) at room temperature for 4 hours. Supernatant was dialyzed with water and 0.15 M NaCl for 1 night each then being freeze dried. 1 g of obtained protein fraction was purified in Sephadex G-75 (10 cm x 1.0 cm) column. Resulted extract was re-dried using freeze dryer for hemagglutination test towards A, B, AB and O blood types. The result shows that toxalbumin acitivities were inhibited by moist heating in autoclave at the temperature of 121oC for 10 minutes followed by drying in oven 70oC for 7 hours.
Studi Kinetika Efektifitas Minyak Daun Cengkeh (Syzigium aromaticum) Sebagai Antifungi Candida albicans
Authors: Musta Rustam , Nurliana Laily
Published: August 2024

Kinetic studies effectiveness clove leaf (Syzigium aromaticum) oil as antifungal Candida albicans have been done. The study have purpose to determine the reaction order, reaction constants (k) and relationship the concentration of clove leaf (Syzigium aromaticum) oil every time (At) with the initial concentration of of clove (Syzigium aromaticum) oil (Ao) and time (t) and equipped determination of the minimum concentration of clove leaf (Syzigium aromaticum)oil effective anti-fungus Candida albicans. The results shows the anti-fungal activity clove leaf (Syzigium aromaticum) oil on Candida albicans for each variation of the concentration 100%, 75%, 50% and 25% are 14.2 mm, 12.2 mm, 10.8 mm and 10.4 mm respectively. Reaction order as antifungal of the clove leaf (Syzigium aromaticum) oil on Candida albicans is 0.2112 with k = 5.0594. The minimum concentration of clove leaf (Syzigium aromaticum) oil as anti-fungal Candida albicans is 17.86%.
Studi Potensi Pirazolin Tersubstitusi 1-N dari Thiosemicarbazone sebagai Agen Antiamuba melalui Uji In Silico
Authors: La Kilo Akram , Aman La Ode , Sabihi Ismail , La Kilo Jafar
Published: August 2024

This Research aims to study Quantitative Structure-Activity Relationship (QSAR) of pyrazoline analogues, designing the new potential compounds as antiamoebic and study the interactions between the new compunds and the drugs target by molecular docking approach. This research was a theoritical research using computational chemistry method. The object of research was 21 novel of 1-N-substituted pyrazoline analogues of thiosemicarbazones with their antiamoebic biological activity. The data of research was obtained from quantum chemistry calculation and statistically analysis using Multiple Linear Regression (MLR). The resulting QSAR equation was Log IC50 = 0.869 + (0.081 x TPSA) + (0.018 x HF) + (0.527 x E-HOMO) + (3.378 x E-LUMO) + (-16.938 x Glob) + (0.234 x LogP), with statistic parameters of n = 21; R2 = 0.933; SEE = 0.14558; FHitung/FTabel = 8.607; PRESS = 0.491. This equation was used as a basic for designing and predicting the new antiamoebic compounds of pyrazoline analogues. The design of new compound of two lead compounds with the Topliss resulted 5 of 18 new compounds having theoretical better activity than the lead compound. Molecular docking study indicated that all of the best compounds have ability to bind to drug target macromolecule.
Transesterifikasi Minyak Ikan Perak (Mene maculata) Dengan Katalis CaO Dari Cangkang Telur Ayam
Authors: Tahya Kartika , Tahya Candra Yulius , Kainama Healthy
Published: August 2024

Silver fish (Mene maculata) is a type of pelagic fish found in the Moluccas sea, this fish has a high oil content so that it is easy to extract the oil content for transesterification. The transesterification reaction of oil from silver fish oil needs a catalyst, and heterogenous catalyst is a better choice. This study was determined the fatty acid methyl ester composition of M. maculata by transesterification process using heterogeneous CaO catalyst from chicken egg shells through 3 steps i.e. oil isolation, CaO catalyst synthesis, and oil transesterification reactions. Oil isolation was carried out by soxhletation method using petroleum ether with the oil content was 13.51%. Synthesis of CaO catalyst was carried out by calcination at 1000 Â°C for 2 hours and then charactererized by XRD. Fish oil is transesterified using CaO catalyst in a ratio of 11% (w/v) of the mixture. Furthermore, fatty acid methyl esters obtained were analyzed using GC-MS. The results showed 6 methyl ester fatty acids as composition of transesterification products which were methyl myristic (11.85%), methyl palmitoleate (8.71%), methyl palmitic (25.13%), methyl oleic (9.49%), methyl stearic (10.04%), and methyl 5,8,11,14-eikosatetraenoate (1.96%).
Extraction, Fractionation, And Antioxidant Examination Of Polyfloral Honey Originated From Bone Prefecture South Sulawesi Province
Authors: Mandey Fredryk W , Handayani Endah , Nanda Wahyuni Eka , Noor Alfian
Published: August 2024

The aim of this research to isolate and identify and to test the antioxidant activity of extract and fraction of polyfloral honey originated from Bone regency, South Sulawesi. The results showed that methanol gave results in flavonoid, tannin, saponnin, steroid, and alkaloid with IC50 value of DPPH method of 683,153 Âµg/mL. DCM extract gave positive results for tannin, steroid and alkaloid with IC50 values of 701,743 Âµg/mL. n-hexane extract positively contains tannin and alkaloid with IC50 1709,536 Âµg/Ml, water extract positevely contains tannin, sapponin steroid, alkaloid with IC50 value 1698,345 Âµg/mL. Pure honey contains all aspects tested with IC50 values 2826,471 Âµg/mL. This showed extracts and sample have weak antioxidant activity.
Serbuk Gergaji Kayu Jati Teraktivasi EDTA Sebagai Penjerap Ion Tembaga (II) dan Krom (III)
Authors: Irdhawati Irdhawati , Triyunita Sinthadevi Ni Nyoman , Sahara Emmy
Published: August 2024

Teak sawdust is a waste of the furniture industry. The main compound content is cellulose, which contains hydroxyl groups so that can be used as adsorbent. This work aims to determine adsorption capacity and isotherm adsorption pattern of teak sawdust activated by EDTA for copper (II) dan chromium (III) ions. Some parameters were optimized including the ratio of adsorbent and EDTA, and contact time.  The results showed the optimum ratio of teak sawdust and EDTA was 2:3, and the optimum contact time was 105 minutes.  Both of isoterm adsorption patterns of teak sawdust to Cu (II) and Cr (III) ions follow the Freundlich equation, with determination coefficient close to one. Optimum adsorption capacity was obtained 46.5 and 39.7 mg/g for Cu (II) and Cr (III), respectively.
Kinetika Kimia Antibakteri Fraksi Alkana Alifatik Hasil Pirolisis Cangkang Biji Jambu Mete (CNS)
Authors: Musta Rustam , Nurliana Laily , Andraysno Andraysno
Published: August 2024

Chemical kinetics research antibacterial of aliphatic alkane fraction from the results of pyrolysis Cashew Nut Shell (CNS) (Annacardium occidentale L.) on Eschericia coli have been carried out. Cashew nuts are prepared by separating the shell and seeds for pyrolysis and purifying using a fractional distillation device. The results of E. coli anti-bacterial activity test from aliphatic alkane fractional distillation results of cashew nut shell pyrolysis products showed that the inhibitory power was different from each concentration variation of 100%, 75%, 50%, 25%, and 12.5%, with inhibitor zone: 8.02; 7.16; 5.56; 4.52 dan 4.26 mm which indicates that the inhibition is weak category for 12.5% and 25%, medium category for 50%, 75% and 100%. The clear zone that has been formed are calculated in terms of its chemical kinetics including the reaction order and the activity rate constant. The reaction order (n) antibacterial of aliphatic alkane fraction from the results of pyrolysis CNS on E. coli was 0.3145 with a constant activity rate of (k) = 1,7791.
Sintesis Dimerkaptoetil Adipat sebagai Bahan Baku Stabiliser Termal Polivinil Klorida berbasis Timah Organik Ester Balik
Authors: Putrawan I Dewa Gede Arsa , Natan Nikanor , Syakuron Rizal Abdan
Published: August 2024

This research aimed to study the synthesis of dimercaptoethyl adipate as raw materials for polyvinyl chloride thermal stabilizer from mercaptoethanol and adipic acid in a batch reactor in which water as a side product was removed by azeotropic evaporation. The study was done through comparative experimental tests where the factors studied included entrainer, mercaptoethanol excess, and reactor volume. It was found that the products obtained were liquid at room condition having clarity in the 95%-99% range, sulfhydryl content in the 23.3%-24.3% range, and yield in the 83.7%-92.1% range. Clarities, sulfhydryl contents, and yields at 20% and 40% mercaptoethanol excesses were not significantly different. At 1 L and 5 L reactor volumes, sulfhydryl contents were found to be significantly different but clarities and yields were not significantly different. Both n-hexane and cyclohexane could be used as entrainers to remove water in the synthesis of dimercaptoethyl adipate. Both entrainers gave clarities and yields that are not significantly different. n-hexane resulted in sulfhydryl content which was 0.77% higher than that of cyclohexane. However, bearing in mind health factors, cyclohexane is considered to be better than n-hexane.
Karakterisasi Fotokatalis Untuk Fotoreduksi Karbon Dioksida Menjadi Asam Format Dalam Fasa Akuatik
Authors: Rizkiana Jenny , Devianto Hary , Soerawidjaja Tatang Hernas
Published: August 2024

Photoreduction of carbon dioxide is one of the promising method to reduce green house gas emission. Carbon dioxide can be converted into organic chemical that has higher economic value by utilizing light energy. One of the favorable product is formic acid which is can be used as hydrogen-carrier. For this process, photocatalyst plays important role as it can increase the rate of reaction and as well as the selectivity as such more desirable product can be produced. The objective of present study is to develop photocatalyst which can significantly catalyze the photoreduction process of CO2 to form formic acid. Zinc titanate doped with aluminium is used as the base photocatalyst. Photoreduction process is held in room condition using three 2800 lm lamp. Qualitative analysis of the product is done by silver solid test and acidity test while quantitative analysis is done by High Performance Liquid Chromatography (HPLC) test. The silver solid test results confirm that formic acid is formed during process. Based on acidity profile data, anthocyanin as photosensitizer could increase higher acidity in the mixture than melanin. However, the concentration of formic acid in the solution is still very low so that it cannot be detected by HPLC.
Penyingkiran Merkuri Dari Minyak Mentah Berat: Konversi Merkuri Ion ke Merkuri Metalik
Authors: Partono Adhi Tri , Prabowo Harris , Indarto Antonius
Published: August 2024

The presence of mercury in crude oil creates problems in oil processing in refineries, both in terms of operations and health. The previous removal process of mercury has not yet optimally removed mercury in the product, due to ionic and metallic mercury species. In this study, to obtain optimum results, the process of removal of mercury begins with the process of converting ionic (non-metallic) mercury into metallic mercury thermally in the liquid phase, followed by the transfer of metallic mercury to the gas phase by instant evaporation (flashing) and reinforced by gas stripping using internal gas cone from the evaporation of an instant. The results of the optimization of the process carried out can eliminate mercury with an efficiency of more than 95%.
Variasi Jarak Antar Layer Bentonit Pada Pembuatan Nanokomposit Pla-Bentonit Sebagai Kemasan Makanan
Authors: Wonoputri Vita , Emanuella Natasha , Angelica Evelyn , Sitompul Johnner
Published: August 2024

In this study, bentonite was used as a filler in the synthesis of polylactic acid (PLA) nanocomposite. The mechanical property of PLA-Bentonite nanocomposite was treated using two different surfactants, namely octadecyl amine (ODA) and trimethyl stearyl ammonium chloride (TSC) at two different concentration (20 mmol and 40 mmol). The treatments of ODA and TSC in the matrix with regards to the basal spacing of bentonite stacks  measured by X-Ray Diffraction (XRD) analysis. The results showed a significant increase in basal spacing was obtained when TSC 40 was applied for treatment. Data of Fourier Transform Infrared Spectroscopy (FTIR) suggested that this increase was caused by the incorporation of surfactant into the bentonite stacks. Most of the PLA-Bentonite nanocomposite can form intercalation structure, while a sample containing TSC 40 formed exfoliation structure. This exfoliation structure resulted in a film with the best tensile strength and water vapor permeability compared to the others. The film containing TSC 40 showed the lowest reduction in water activity, almost similar to the bread sample wrapped using conventional plastic. The bread wrapped with TSC 40 film was not grown by fungi as opposed to the conventional plastic, showing the potential of the nanocomposite film as food packaging.
Optimasi Adsorpsi Kompetitif Pewarna Biru Metilena dan Metil Oranye Menggunakan Adsorben Zeolit Alam Ende - Nusa Tenggara Timur (NTT)
Authors: Ngapa Yulius Dala , Ika Yasinta Embu
Published: August 2024

Waste from the textile industry is considered as a potential source of environmental pollution, especially water because it contains dangerous dyes. In this research, natural zeolite is used as an effective and efficient alternative adsorbent to overcome pollution caused by methylene blue and methyl orange dyes. Activation of natural zeolite was carried out with 3 M HCl solution and was characterized using X-Ray Diffraction (XRD) and Scanning Electron Microscope (SEM). While the methylene blue and methyl orange adsorption processes were studied in variations in the weight of the adsorbent, contact time, and pH. The concentration of dyes left in the solution was observed with Spectrophotometer UV-Vis. The results showed that the adsorption capacity of natural zeolite in absorbing methylene blue was 21.189 mg/g and methyl orange was 18.208 mg/g. The optimum conditions of methylene blue and methyl orange adsorption are achieved with successive adsorbent weights 0.3 g and 0,4 g, successive contact times are  60 minutes and 90 minutes, and successive pH are 6 and 2 respectively. The adsorbent weight factor, contact time, and pH have an effect on the adsorption of methylene blue and methyl orange by natural zeolite from  Ende.
Stability Indicating RP-HPLC for Quantification Mangiferin in Extract of Three Species Mango Leaves
Authors: Retnaningtyas Yuni , Kristiningrum Nia , Renggani Hidayah Dwi , Sary Indah Purnama
Published: August 2024

The stability indication of Reversed Phase-High Performance Liquid Chromatography (RP-HPLC) method was validated for quantitative determination of mangiferin on three species mango leaves (Mangifera odorata Griff, Mangifera foetida Lour, and Mangifera indica L.). The samples were extracted by maseration method using methanol and concentrated using rotary evaporator. The method carried out on stationary phase a purospher RP-18 endcapped (25 cm Ã— 4.6 mm i.d., 5 Âµm) column with a mobile phase consisting of methanol: phosphoric acid 0.1% (v/v) (31:69); flow rate:0.8 mL/min; solvent methanol, detection was carried out at 258 nm. The analytical  performace this measurement is good with the value of linearity (r2=0.998), precision (%RSD=0.649%), and accuration (10.67%). The forced degradation studies were carried out according to the International Conference on Harmonization (ICH) guidelines. The results indicating that the complete separation between degradation products and mangiferin peak occured. The degradation limit of mangiferin 5â€“20% (according to the guideline of ICH) except in basic condition (100%). The method was succesful applied to determine of the mangiferin in  pakel (Mangifera foetida), kweni (Mangifera indica) and kopyor (Mangifera odorata) extract. The mangiferin content was obtained are pakel (9.95%), kopyor (7.40%) and kweni (Mangifera odorata) (2.49%) respectively.
Adsorption of Tetracycline Hydrochloride from Solutions Using Mesoporous Silica, MCM-48
Authors: Taba Paulina , Mutmainnah Mutmainnah , Hala Yusafir
Published: August 2024

Mesoporous silica with cubic structure (MCM-48) was synthesized using Ludox HS40 as silica source and cetyltrimethylammonium bromide (CTAB) as a template. MCM-48 was used to adsorb the antibiotic of tetracycline hydrochloride. An X-ray diffractometer observed the x-ray diffraction pattern of MCM-48 and functional groups observed by a Fourier Transformed Infrared (FTIR) spectrometer. Parameters used to study adsorption were contact time and concentration. The pseudo-second-order was the kinetic order that fitted well with the adsorption of tetracycline HCl. The adsorption of tetracycline HCl on MCM-48 followed the Freundlich isotherm with the adsorption capacity of 0.98 mg/g.
Bioconcentration of Chrome (Cr) Metal in Three Types of Sponge (Callispongia sp., Xetospongsia sp. and Petrosia sp.) from Ambon Bay
Authors: Siahaya Antho Netty , Noor Alfian , Joris Shielda Natalia
Published: August 2024

Research about bioconcentration of Chrome metal in three types of sponge (Callispongia sp., Xetospongia sp., and Petrosia sp.) from Ambon Bay. This research main is to know the most effective type to accumulate Cr metal in water. The Cr concentration measurement of water, sediment, and sponges at each location shows that metal concentration is 0.001-0.030 ppm in sediment higher than 0.001-0.003 ppm in water. Concentration based on sponges type Callispongia sp., Xetospongia sp., and Petrosia sp. are 0.001-0.262 mg/kg dry weight: 0.001-0.134 mg/kg dry weight, 0.001-0.330 mg/kg dry weight, respectively. The adsorption factor (AF) of Cr metal ranges from 0.000-0.028 ppm. Bioconcentration factor (BCF) based on sponges type Callispongia sp., Xetospongia sp., and  Petrosia sp. are -0.011-0.261 mg/kg dry weight, -0.001-0.132 mg/kg dry weight, and -0.001-0.329 mg/kg weight dry, respectively. Sponges type that suitable used as Cr metal pollution monitoring media is Callispongia sp. and Xetospongia sp.
Isolation of Lycopene Component from Tamarillo (Solanum betaceum)
Authors: Damayanti Jeanne Dewi , Azmilia Ririn , Ainun Zul , Amin R. Nur , Nurdin M. Ilham
Published: August 2024

Lycopene is a red pigment found in tamarillo with its function as an antioxidant that protects body cells from the negative effects of free radicals so that they do not trigger diseases, especially cancer and premature aging. This study was intended to improve the quality of tamarillo by isolating lycopene from tamarillo through an extraction process with chloroform as a solvent by maceration for 3 days at room temperature. The lycopene extract obtained was dissolved by means of a rotary evaporator at 40 oC under vacuum pressure and oven temperature at 60 oC. The lycopene obtained was analyzed by Gas Chromatography-Mass Spectrometry and the crystal structure of lycopene was characterized by Fourier Transform Infra-Red Spectroscopy. GCMS results showed that 0.21 g of lycopene was successfully isolated from 100 g of dried red tamarillo fruit powder. Functional group analysis using FT-IR at a wavelength of 978.23 cm-1 showed the R-CH=CH-R group; the -CH3- group of 1371.43 cm-1; the 1460.16 cm-1 indicates the bending vibration of -CH2-; the C=C chain of 1656.91 and 1745.64 cm-1; and the   C-H of 2856.67 and 2926.11 cm-1 of the lycopene chain.
Liquid Smoke Fractionation from Dry Distillation of Styrofoam Board Waste to Produces Liquid Fuel
Authors: Anom I Dewa K
Published: August 2024

Styrofoam waste is difficult to be decomposed by bacteria or microorganisms. Therefore it takes a long time to be decomposed naturally. Styrofoam waste, in general, is a big problem for the survival of living things on earth because there are quite a lot of them. So, if not handled properly can cause environmental pollution. Styrofoam waste is inorganic waste composed of polymers derived from chemicals. Additives from styrofoam are harmful to humans because they are carcinogenic. This study aims to utilize Styrofoam board waste into liquid fuel. Liquid fuel from styrofoam waste has been made successfully through dry distillation and fractionation methods. The result of fractional distillation is 42.00% liquid fuel. Based on the physical properties tests that have already been carried out, including the density test, viscosity,  flash point, boiling point, calorific value, and octane number, it turns out that the liquid has characteristics close to the standard gasoline fuel. The MS spectra and the GC chromatogram show that the liquid fuel consists of a mixture of hydrocarbon compounds, namely acetone 0.23%, acetic acid 0.40%, benzene 2.82%, toluene 3.56%, heptane 1.04%, 1-octene 0.26%, butyl ester 4.92%, 2,4-dimethyl-1-heptane 0.32%, p-xylene 13%, the compound with the highest composition was styrene 73.45%.
Density Functional Theory for QSAR Antioxidant Compound Myristicin Derivatives
Authors: Muliadi Muliadi , Basimin Mudzuna Quraisyah , Jayali Ahmad Muchsin
Published: August 2024

This research was conducted to determine the molecular structure modeling and the quantitative relationship of the activity structure (QSAR) of substituted myristicin derivatives with electron donor groups such as -C6H5 (M1), -NH2 (M2), -Cl (M3), -F (M4), and -H (M5). The results of geometry optimization with the DFT (Density Fractal Theory) method or density functional calculations calculated with the density level of B3LYP/6-31G each obtained the total energy of each compound M1- M5: M1: 175.49 kcal/mol M2: 132.707 kcal/mol, M3: 115.701 kcal/mol, M4: 116.048 kcal/mol, M5: 121.377 kcal/mol. Determining the relationship between descriptors and the antioxidant activity (IC50) for basic structure myristicin compounds and five derivatives was carried out using SPSS 21. The results of the correlation analysis showed that there was a relationship between the descriptors and antioxidant activity. Determining the best QSAR equation model is done by analyzing multiple linear and multilinear regression using IBM SPSS 21. The results of multiple linear regression analysis or multilinear regression obtained for the best QSAR equation model are: Log P = -2.600 + (0.006) IW- (1.558) qC8 - (6.532) EHOMO + (0.014) PSA + (0.133) MD with n = 6, R = 1.000, R2 = 0.926, SE = 0.
Pelatihan Pertolongan Pertama Pada Kecelakaan (P3K) di Masyarakat Kelurahan Tanjung Perak Kota Surabaya
Authors: Afifah Ridwan Khalisa , Sunaryo Merry
Published: August 2024

Tanjung Perak adalah salah satu wilayah atau kawasan strategis di Kota Surabaya untuk pendukung pertumbuhan ekonomi. Mayoritas masyarakat Tanjung Perak bekerja dengan membuka usaha. Dimana suatu kecelakaan dapat dengan mudah terjadi dan dibutuhkan bantuan segera dan tepat untuk melindungi korban dari potensi bahaya. Pelatihan Pertolongan Pertama Pada Kecelakaan (P3K) bertujuan meningkatkan pengetahuan dan keterampilan warga agar mampu berperan aktif dalam pertolongan pertama pada kecelakaan bagi seluruh masyarakat dalam menghadapi kondisi kecelakaan di sekitar dimana hal tersebut sangat bermanfaat untuk menyelamatkan jiwa korban dan meminimalisasi kecacatan. Adapun yang menjadi fokus utama kegiatan pelatihan ini merupakan warga dari RW 01 Kelurahan Tanjung Perak Surabaya dengan jumlah peserta dalam pelatihan terdiri atas 30 warga. Pelaksanaan dalam kegiatan pelatihan P3K ini meliputi beberapa tahapan diantaranya adalah survei kelompok sasaran, persiapan, pelaksanaan kegiatan, dan evaluasi. Dimana pada pelaksanaan kegiatan menggunakan metode ceramah, praktik, dan tanya jawab. Hasil uji statistik menggunakan paired sample T-Test ditemukan nilai sebesar 0.012<0.05, hal ini menunjukkan bahwa terdapat perbedaan yang signifikan antara tingkat pemahaman dan keterampilan mengenai Tindakan P3K dalam kehidupan sehari-hari sebelum dan sesudah kegiatan pelatihan.Tanjung Perak adalah salah satu wilayah atau kawasan strategis di Kota Surabaya untuk pendukung pertumbuhan ekonomi. Mayoritas masyarakat Tanjung Perak bekerja dengan membuka usaha. Dimana suatu kecelakaan dapat dengan mudah terjadi dan dibutuhkan bantuan segera dan tepat untuk melindungi korban dari potensi bahaya. Pelatihan Pertolongan Pertama Pada Kecelakaan (P3K) bertujuan meningkatkan pengetahuan dan keterampilan warga agar mampu berperan aktif dalam pertolongan pertama pada kecelakaan bagi seluruh masyarakat dalam menghadapi kondisi kecelakaan di sekitar dimana hal tersebut sangat bermanfaat untuk menyelamatkan jiwa korban dan meminimalisasi kecacatan. Adapun yang menjadi fokus utama kegiatan pelatihan ini merupakan warga dari RW 01 Kelurahan Tanjung Perak Surabaya dengan jumlah peserta dalam pelatihan terdiri atas 30 warga. Pelaksanaan dalam kegiatan pelatihan P3K ini meliputi beberapa tahapan diantaranya adalah survei kelompok sasaran, persiapan, pelaksanaan kegiatan, dan evaluasi. Dimana pada pelaksanaan kegiatan menggunakan metode ceramah, praktik, dan tanya jawab. Hasil uji statistik menggunakan paired sample T-Test ditemukan nilai sebesar 0.012<0.05, hal ini menunjukkan bahwa terdapat perbedaan yang signifikan antara tingkat pemahaman dan keterampilan mengenai Tindakan P3K dalam kehidupan sehari-hari sebelum dan sesudah kegiatan pelatihan.
Optimalisasi Marketplace Dalam Rangka Meningkatkan Penjualan UKM Luluana Craft Di Era Digital
Authors: Andari Andari , Arlofa Nina , Widyarto Wahyu Oktri , Akbar Izzudin Fikri , Mustafa Muhammad Aqsa
Published: August 2024

Pengabdian masyarakat ini bertujuan untuk mengoptimalkan marketplace dalam rangka meningkatkan penjualan hasil produk Luluana Craft Indonesia, dengan cara memperluas pasar melalui digital marketing. Berdasarkan hasil observasi UKM memiliki keterbatasan dalam pemasaran secara online, yang hanya dilakukan secara konvensional. Kegiatan ini menggunakan metode yang dibagi kedalam beberapa tahapan diantaranya, tahap pra kegiatan, tahap sosialisasi, tahap pendampingan, dan tahap evaluasi. Pelaksanaan kegiatan ini dimulai dengan tahap pra kegiatan yang merupakan tahap perencanaan materi yang sesuai dengan kebutuhan mitra, dilanjut dengan penyampaian materi digital marketing, marketplace, serta pembuatan akun di media sosial dan platform digital, dilanjutkan dengan pendampingan kepada mitra sampai mitra tersebut mampu untuk memasarkan produknya secara online. Hasil pengabdian masyarakat ini menunjukan bahwa mitra sangat antusias dalam mengikuti kegiatan ini karena pemahaman mengenai pemasaran secara digital menjadi meningkat. Mitra memiliki peluang yang lebih luas dalam memasarkan produk nya, sehingga selain dapat meningkatkan penjualan dan tujuan lainnya yaitu kontribusi dalam menangani limbah plastik menjadi meningkat.
До питання застосування методу дискретних вихорів для визначення аеродинамічних характеристик повітряних суден
Authors: Ковтонюк І. Б. , Колесник Є. В.
Published: August 2024

Проведено огляд робіт щодо використання методу дискретних вихорів для дослідження аеродинамічних характеристик повітряних суден. Показано актуальність і можливості методу дискретних вихорів при багатоваріантній, багатопараметричній проробці аеродинамічного компонування повітряних суден. Розглянуто напрямки досліджень в рамках методу дискретних вихорів. Встановлено потребу у визначенні аеродинамічних характеристик повітряних суден з дефектами та пошкодженнями несучих поверхонь, включаючи бойові.
Умовні ймовірності ураження повітряних цілей при автономних діях особового складу бойової машини зенітного ракетного комплексу малої дальності
Authors: Кудряшов В. Є. , Воїнов В. В. , Балабуха О. С. , Хроль Л. О. , Кириченко М. І. , Галузінський А. Г. , Федченко С. І.
Published: August 2024

Розроблена методика чисельного моделювання визначення показника ефективності стрільби ракетою у вигляді значень умовної ймовірності ураження повітряних цілей (ПЦ). При моделюванні враховані конструктивні і технічні характеристики станцій і систем бойової машини (БМ) та ракети. Розглянуто дію завад різної щільності або їх залишків після відповідної компенсації. Обчислений вплив можливого маневру ПЦ з різними перевантаженнями та їх ефективною поверхнею розсіювання (ЕПР). Знайдені дальності виявлення ПЦ в умовах завад по радіолокаційній станції (РЛС) розвідки БМ. Приведені результати розрахунків дальностей захоплення ПЦ на автоматичне супроводження станцією супроводження цілі (ССЦ). Визначені похилі дальності до дальньої межі зони ураження (ДМЗУ) зенітного ракетного комплексу (ЗРК) малої дальності (МД). Приведені значення ймовірностей проходження ракети у ”трубці” заданого радіусу в якості величин першого роду помилок стрільби ракетами. Надані значення другого роду помилок стрільби, а саме величин умовних ймовірностей спрацювання радіозапалу (РЗ) ракети у різноманітних умовах. Зміна значень ЕПР, рівня завад по РЛС розвідки БМ та ССЦ БМ, швидкості польоту ПЦ та рівня завад по РЗ ракети визначає значення показник ефективності стрільби при обстрілі різних ПЦ з визначенням ДМЗУ ЗРК МД. Приведені аналітичні вирази, методика чисельного моделювання показників ефективності стрільби ракетами та відповідний їм графічний матеріал.