bluuebunny/crossref_metadata_2025_split huggingface dataset:
STUDI KEKUATAN TARIK DAN KEKERASAN LOGAM BAJA P.25 dan S.25 DENGAN METODE NEWTON
Authors: Ady Jan 
Published: July 2019

STUDI KEKUATAN TARIK DAN KEKERASAN LOGAM BAJAP.25 dan S.25 DENGAN METODE NEWTON Jan Ady1) 1) Departemen Fisika Fakultas Sains dan Teknologi Universitas Airlangga Surabaya Jan_ady@yahoo.com ABSTRAK Telah dilakukan studi tentang sifat mekanik logam baja jenis polos P.25 dan ulir S.25 dengan metode Newton. Uji kekuatan tarik dilakukan dengan mengukur tegangan-regangan menggunakan Autograph sedangkan uji kekerasan dilakukan dengan pengukuran Hardness Vickers Tester. Nilai modulus elastisitas baja S. 25 adalah 54,80 Kg/mm2 dan 31,78 Kg/mm2 untuk baja P.25. Rata-rata nilai kekerasan adalah 227,2 kgf/mm2 untuk baja S.25 dan 195,6 kgf/mm2 untuk baja P.25. Hasil ini menunjukkan bahwa logam baja S.25 memiliki kekuatan tarik dan kekerasan yang relatif lebih baik dari pada logam baja P.25, sesuai demgan pengukuran dan perhitungan menggunakan metode Newton. Kata Kunci: Baja P.25 and S.25, kekerasan, kuat tarik, metode Newton STUDY ON THE TENSILE STRENGTH AND HARDNESS OF STEEL TYPE P.25 AND S.25 USING NEWTONIAN METHOD ABSTRACT The mechanical properties of steel P.25 (smooth type) and S.25 (screwed type) was studied using Newtonian method. The tensile strength was evaluated by measuring the stress-strain using autograph, whereas the hardness was measured by Hardness Vickers Tester. The modulus elasticity was 54,80 Kg/mm2 for steel S.25 and 31,78 Kg/mm2 for steel P.25. The average hardness was 227,2 kgf/mm2 for steel S.25 and 195,6 kgf/mm2 for steelP.25. These results indicated that the tensile strength and hardness of steel S.25 were relatively better than steel P.25, based on the measurement and calculation using Newtonian method. Keywords : Steel P.25 and S.25, Newtonian, Hardness, Tensile strength, Newtonian method
PENGARUH VCO MENGANDUNG EKSTRAK WORTEL TERHADAP PEROKSIDASI LIPID PLASMA
Authors: Momuat Lidya I , Sangi Meiske S , Purwati Ni Putu 
Published: July 2019

PENGARUH VCO MENGANDUNG EKSTRAK WORTEL TERHADAP PEROKSIDASI LIPID PLASMA Lidya Irma Momuat1), Meiske S. Sangi1), Ni Putu Purwati2) 1)Program Studi Kimia FMIPA Universitas Sam Ratulangi, Manado 95115; 2)Alumni Program Studi Kimia FMIPA Universitas Sam Ratulangi, Manado 95115 ABSTRAK Penelitian ini bertujuan untuk mengukur tingkat oksidasi lipid dalam plasma darah tikus yang diberi pakan VCO mengandung ekstrak wortel. Tikus Wistar jantan pada penelitian ini dibagi menjadi empat kelompok, yaitu (I) pakan standar (kontrol), (II) 10% VCO tanpa ekstrak wortel, (III) 10% VCO mengandung ekstrak wortel dan (IV) 10% minyak jagung. Setelah 4 minggu masa perlakuan, plasma darah dipisahkan dengan sentrifugasi untuk analisis tingkat oksidasi plasma dengan mengukur konsentrasi malondialdehida (MDA) menggunakan metode uji asam tiobarbiturat. Hasil penelitian menunjukkan bahwa konsentrasi MDA tertinggi terdapat pada kelompok tikus yang diberi minyak jagung (11,253 mM), diikuti kelompok kontrol (10,167 mM), lalu kelompok tikus yang diberi VCO mengandung ekstrak wortel (8,656 mM) dan VCO (8,269 mM). Penelitian ini menyimpulkan bahwa tingkat oksidasi lipid plasma tikus yang diberi VCO mengandung ekstrak wortel relatif sama dengan yang diberi VCO tanpa ekstrak wortel, tetapi lebih rendah daripada kontrol dan yang diberi minyak jagung. Kata kunci: malondialdehida, minyak kelapa, wortel EFFECT OF VIRGIN COCONUT OIL (VCO) CONTAINING CARROT EXTRACT ON PLASMA LIPID PEROXIDATION ABSTRACT The aim of this study was measure the level of lipid oxidation in the blood plasma of rats fed VCO containing carrot extracts. Male Wistar rats in this study were divided into four groups: (i) control, (II) 10% VCO without the carrot extract, (III) 10% VCO containing carrot extracts, and (IV) 10% corn oil. After 4 weeks of treatment, blood from each rat was taken by syringe. Plasma is separated from whole blood by centrifugation for analysis of plasma oxidation levels by measuring the malondialdehyde (MDA) concentration using tiobarbituric acid test. The results showed that the highest concentration of MDA was found in rats fed corn oil (11.253 m M), followed by the control group (10.167 m M), then rats fed VCO containing carrot extract (8.656 m M) and VCO (8.269 m M). This study concluded that the level of plasma lipid oxidation in rats fed VCO containing carrot extracts is relatively similar to rats fed VCO without the carrot extract, but it is lower than the control and corn oil groups. Keywords: malondialdehyde, coconut oil, carrot
KONSENTRASI KLOROFIL DAUN PADI PADA SAAT KEKURANGAN AIR YANG DIINDUKSI DENGAN POLIETILEN GLIKOL
Authors: Banyo Yunia E , Nio Ai S , Siahaan Parluhutan , Tangapo Agustina M 
Published: July 2019

KONSENTRASI KLOROFIL DAUN PADI PADA SAAT KEKURANGAN AIR YANG DIINDUKSI DENGAN POLIETILEN GLIKOL ABSTRAK Telah dilakukan penelitian mengenai konsentrasi klorofil daun padi (Oryza sativa L.) kultivar Serayu dan IR 64 pada saat kekurangan air yang diinduksi dengan polietilen glikol (PEG). Penelitian ini bertujuan untuk membandingkan konsentrasi klorofil total, klorofil a dan klorofil b pada daun padi pada saat kekurangan air yang diinduksi dengan PEG 8000 dengan mengkultur tanaman padi pada medium dengan potensial air (PA) 0; -0,5 dan -1 MPa. Sampel helaian daun (lamina) untuk tiap perlakuan diambil sebanyak 1 g, dihaluskan dengan mortar dan pestel, lalu diekstraksi dengan alkohol 95% sampai semua klorofil terlarut. Ekstrak disaring dan supernatan ditampung dalam labu ukur 100 ml, lalu ditambahkan alkohol 95% sampai 100 ml. Konsentrasi klorofil diukur dengan spektrofotometer pada panjang gelombang 649 dan 665 nm. Berdasarkan hasil yang diperoleh, tanaman padi kultivar Serayu dan IR 64 mulai mengalami kekeringan pada PEG dengan PA -0,5 MPa dengan ciri-ciri daun yang kering, menggulung dan batang yang berwarna kecoklatan. Perbedaan konsentrasi klorofil total, klorofil a, dan klorofil b pada daun padi kultivar Serayu dan IR 64 diamati pada PEG dengan PA 0; -0,5 dan -0,1 MPa. Kata kunci: konsentrasi klorofil, polietilen glikol (PEG), kekurangan air, padi kultivar Serayu dan IR 64 THE CHLOROPHYLL CONCENTRATION IN RICE LEAVES UNDER POLYETHYLENE-GLYCOL- INDUCED WATER DEFICIT ABSTRACT A research was conducted to evaluate the concentrations of total clorophyll, chlorophyll a and clorophyll b in rice (Oryza sativa L.) leaves under polyethylene-glycol-induced water deficit. The water deficit was induced by culturing the plants in medium containing polyethylene glycol (PEG) 8000 with water potential (PA) 0;-0,5; and -1 MPa for 2 days. Leaf lamina (1 g) was sampled from each treatment at day 0 and 2. Each sample was ground using porcelain mortar and pestle, and extracted with 95% ethanol until all chlorophyll was dissolved. The extract was filtered, the supernatant was collected in 100 ml flask and added with 95% ethanol until 100 ml. The chlorophyll concentration was measured using spechtrophotometer at 649 and 665 nm. The dry and rolled leaves and brown stems were observed in cultivar Serayu and IR 64 that were cultivated in media containing PEG with PA -0,5 and -1,0 MPa. The concentrations of total chlorophyll, chlorophyll a and b in leaves of cultivar Serayu and IR 64 cultivated in media containing PEG with PA 0; -0,5 and -1,0 MPa were different. Keywords: chlorophyll concentration, polyethylene glycol (PEG), water deficit, Serayu and IR 64 rice cultivars
IDENTIFICATION OF POTENTIAL DIESEL OIL-DEGRADING BACTERIA ISOLATED FROM MANADO SEA PORT BASED ON 16S rRNA GENE
Authors: Abram Olivia H , Tallei Trina E , De Queljoe Edwin , Kolondam Beivy J 
Published: July 2019

ABSTRACT Petroleum contamination and its derivate in ecosystem are considered as environmental threat all over the world. Some microorganisms exhibit potential to degrade hydrocarbon in contaminated environments. This study aims at identifying potential diesel oil-degrading bacteria grown on artificial media. Bacteria isolated from Manado Sea port were grown in nutrient agar containing artificial diesel oil plus salt water and diesel oil only, respectively. The growing bacteria were isolated and each of them was grown separately to obtain pure isolate. Three bacterial isolates namely AO2, OA3 and OA4 were identified using 16S rRNA gene as Pseudomonas aeroginosa, Klebsiella oxytoca, and Citrobacter sp, respectively. Keywords: diesel oil, diesel oil-degrading bacteria, Manado Sea Port, 16S rRNA gene IDENTIFIKASI BAKTERI YANG BERPOTENSI SEBAGAI PENDEGRADASI MINYAK DIESEL DI ISOLASI DARI PELABUHAN LAUT MANADO ABSTRAK Kontaminasi minyak bumi dan turunannya dalam ekosistem dianggap sebagai ancaman lingkungan di seluruh dunia. Beberapa mikroorganisme menunjukkan potensi yang dapat menurunkan hidrokarbon dalam lingkungan yang terkontaminasi. Penelitian ini bertujuan untuk mengidentifikasi bakteri yang berpotensi sebagai pendegradasi minyak yang tumbuh pada media buatan. Bakteri diisolasi dari pelabuhan laut Manado dan ditumbuhkan dalam media NA yang mengandung minyak diesel dengan penambahan air garam buatan dan minyak diesel tanpa air garam buatan. Bakteri yang tumbuh diisolasi dan masing-masing ditanam secara terpisah untuk mendapatkan isolat murni. Tiga isolat bakteri yaitu AO2, AO3 dan AO4 yang telah diidentifikasi menggunakan 16S rRNA gen secara berturut-turut adalah Pseudomonas aeroginosa, Klebsiella oxytoca, dan Citrobacter sp. Kata kunci: minyak diesel, bakteri pendegradasi minyak diesel, Pelabuhan Laut Manado, gen 16S rRNA
RANCANG BANGUN ALAT UKUR SUHU BAWAH PERMUKAAN BUMI MENGGUNAKAN IC SENSOR LM35 UNTUK PENGUKURAN SECARA MAPPING
Authors: Tumiwan Gribel Gerald , Suoth Verna Albert , As'ari As’ari 
Published: July 2019

RANCANG BANGUN ALAT UKUR SUHU BAWAH PERMUKAAN BUMI MENGGUNAKAN IC SENSOR LM35 UNTUK PENGUKURAN SECARA MAPPING ABSTRAK Telah dilakukan penelitian untuk mengembangkan alat ukur suhu bawah permukaan bumi secara mapping dengan menggunakan IC Sensor LM35DZ. Akuisisi data alat ukur bawah permukaan menggunakan sistem akuisisi data mikrokontroler AVR ATmega8 dalam unit slave yang sebelumnya telah dibuat dan diuji. Pengembangan dilakukan dengan menambah jumlah sensor menjadi 20 unit dan menghubungkan dengan sistem akuisisi data. Pengujian alat ukur suhu secara mapping dapat dilakukan dengan menyebar 20 sensor pada 20 titik berbeda. Hasil data yang telah direkam, dibuat menjadi peta suhu bawah permukaan melalui tampilan kontur mapping menggunakan program surfer. Hasilnya menunjukan bahwa alat ukur suhu bawah permukaan bumi memiliki kemampuan mendeteksi setiap perubahan suhu secara realtime pada 20 titik berbeda. Kata Kunci: Alat ukur suhu, IC Sensor LM35DZ, mapping. DESIGINING AND CONSTUCTION EARTH’S SUBSURFACE TEMPERATURE MEASURING INSTRUMENT USING LM35 IC SENSOR FOR MAPPING MANNER MEASUREMENT ABSTRACT A research has been done to develop earth’s subsurface temperature measuring instrument using LM35 IC sensor for mapping manner measurement. Data acquisition for the instrument used microcontroller AVR Atmega8 data acquisition system that the slave unit has been made and tested before. A development be done by added the sensor to be twenty units and connected it to acquisition data system. The testing for temperature measuring instrument in mapping manner could be done by spreading the twenty sensors to twenty different point. The data output that has been recorded, be made into earth’s subsurface temperature map through contour mapping display used surfer program. The output showed that the earth’s subsurface temperature measuring instrument could detect realtime temperature changing at twenty different point. Keywords : Temperature measuring intrument, LM35DZ, mapping
Stellar Surface Magnetoconvection as a Source of Astrophysical Noise. III. Sun-as-a-Star Simulations and Optimal Noise Diagnostics
Authors: Cegla H. M. , Watson C. A. , Shelyag S. , Mathioudakis M. , Moutari S. 
Published: July 2019

Abstract
Stellar surface magnetoconvection (granulation) creates asymmetries in the observed stellar absorption lines that can subsequently manifest themselves as spurious radial velocities (RVs) shifts. In turn, this can then mask the Doppler reflex motion induced by orbiting planets on their host stars and represents a particular challenge for determining the masses of low-mass, long-period planets. Herein, we study this impact by creating Sun-as-a-star observations that encapsulate the granulation variability expected from 3D magnetohydrodynamic simulations. These Sun-as-a-star model observations are in good agreement with empirical observations of the Sun but may underestimate the total variability relative to the quiet Sun due to the increased magnetic field strength in our models. We find numerous line profile characteristics that linearly correlate with the disk-integrated convection-induced velocities. Removing the various correlations with the line bisector, equivalent width, and the V
asy indicator may reduce ∼50%–60% of the granulation noise in the measured velocities. We also find that simultaneous photometry may be a key diagnostic, as our proxy for photometric brightness also allowed us to remove ∼50% of the granulation-induced RV noise. These correlations and granulation-noise mitigations break down in the presence of low instrumental resolution and/or increased stellar rotation, as both act to smooth the observed line profile asymmetries.
Probing the Production of Actinides under Different r-process Conditions
Authors: Eichler M , Sayar W , Arcones A , Rauscher T 
Published: July 2019

Abstract
Several extremely metal-poor stars are known to have an enhanced thorium abundance. These actinide-boost stars have likely inherited material from an r-process that operated under different conditions than the r-process that is reflected in most other metal-poor stars with no actinide enhancement. In this article, we explore the sensitivity of actinide production in r-process calculations to the hydrodynamical conditions as well as the nuclear physics. We find that the initial electron fraction Y

e
is the most important factor determining the actinide yields and that the abundance ratios between long-lived actinides and lanthanides like europium can vary for different conditions in our calculations. In our setup, conditions with high entropies systematically lead to lower actinide abundances relative to other r-process elements. Furthermore, actinide-enhanced ejecta can also be distinguished from the “regular” composition in other ways, most notably in the second r-process peak abundances.
Properties of the Turbulence Associated with Electron-only Magnetic Reconnection in Earth’s Magnetosheath
Authors: Stawarz J. E. , Eastwood J. P. , Phan T. D. , Gingell I. L. , Shay M. A. , Burch J. L. , Ergun R. E. , Giles B. L. , Gershman D. J. , Contel O. Le , Lindqvist P.-A. , Russell C. T. , Strangeway R. J. , Torbert R. B. , Argall M. R. , Fischer D. , Magnes W. , Franci L. 
Published: July 2019

Abstract
Turbulent plasmas generate intense current structures, which have long been suggested as magnetic reconnection sites. Recent Magnetospheric Multiscale observations in Earth’s magnetosheath revealed a novel form of reconnection where the dynamics only couple to electrons, without ion involvement. It was suggested that such dynamics were driven by magnetosheath turbulence. In this study, the fluctuations are examined to determine the properties of the turbulence and if a signature of reconnection is present in the turbulence statistics. The study reveals statistical properties consistent with plasma turbulence with a correlation length of ∼10 ion inertial lengths. When reconnection is more prevalent, a steepening of the magnetic spectrum occurs at the length scale of the reconnecting current sheets. The statistics of intense currents suggest the prevalence of electron-scale current sheets favorable for electron reconnection. The results support the hypothesis that electron reconnection is driven by turbulence and highlight diagnostics that may provide insight into reconnection in other turbulent plasmas.
Procédés cycliques et enjeux compositionnels dans les quatuors à cordes de Debussy et de Ravel
Authors: Doé de Maindreville Florence 
Published: July 2019

Si les quatuors à cordes de Debussy et Ravel ont souvent été assimilés, ils illustrent pourtant deux traitements très différents de la « forme cyclique ». Partant des écrits de l’époque, l’étude montre comment Debussy explore de fond en comble les possibilités de la « forme cyclique » en mettant à contribution, à partir d’une idée thématique unique, les paramètres de composition même les plus inattendus, tandis que Ravel, au contraire, cherche à camoufler ses procédés cycliques, en les noyant notamment au milieu d’une riche et nombreuse thématique. Plus généralement, l’étude s’interroge sur les problèmes de composition qui résultent de l’utilisation de procédés cycliques et sur les enjeux qui en découlent, et souligne la diversité des solutions et des choix, lesquels peuvent être considérés comme un acte démonstratif et une façon pour les compositeurs de se positionner dans le contexte musical de l’époque.
L’approche contextuelle : un appui dans l’accompagnement autour des relations parent-enfant en service de placement familial
Authors: Tissot Catherine 
Published: July 2019

À travers cet article, je souhaite partager mes réflexions, à partir de la situation de Léo, sur la façon dont je prends appui sur l’approche contextuelle, dans ma fonction d’éducatrice spécialisée en service de placement familial, dans le cadre de l’accompagnement autour des relations parent-enfant. Je m’attache à la question du « donner-recevoir », qui permet de faire émerger comme une ressource la capacité de l’enfant à donner et les capacités parentales. Je m’attache à la question des loyautés, indissociable de la notion de conflit de loyauté dans lequel l’enfant est en prise dans un contexte de placement.
Cytologic smears improve accuracy of frozen sections of ovarian tumors in the community practice settings
Authors: Cimic Adela , Mironova Maria , Khoury-Collado Fady , Salih Ziyan 
Published: July 2019

Background:
The ovaries can be the site for various primary tumors and also the presenting site of metastatic disease. Quick and correct intraoperative diagnosis is crucial for the patient's further management. The aim of this study was to demonstrate the advantages of the combined diagnostic method – ovarian frozen sections in conjunction with cytologic smears.

Methods:
From June 2016 to June 2017, we prospectively prepared additional two cytologic smears with Diff-Quik stain on ovarian frozen sections comprised of two hematoxylin and eosin sections. For quality assurance purposes, we compared the results of frozen section discrepancies and deferrals with those that of the previous year from June 2015 to June 2016.

Results:
With the introduction of cytologic smears to ovarian frozen sections, the number of discrepancies and deferrals combined decreased from 13.75% to 7.85%. The most benefit of smears was observed in primary ovarian malignancies.

Conclusions:
In the setting where all the members of the pathology group render cytologic evaluations routinely, smears play an important complementary role.
Use of the term atypical cells in the reporting of ascitic fluid cytology: A caveat
Authors: Pai Radha Ramachandra , Shenoy Krithika Damodar , Minal Jessica , Suresh Pooja K. , Chakraborti Shrijeet , Lobo Flora D. 
Published: July 2019

Background:Abdominal paracentesis is a routine diagnostic procedure for assessment of patients with recent onset or worsening of ascites.Objectives:The objective of the study is to (1) review clinically confirmed cases of malignancy with negative, atypical, and suspicious cytology reports and provide reasoning for discrepancies and (2) recalculate sensitivity, specificity, and predictive values after review.Materials and Methods:Papanicolaou smears of ascitic fluid paracentesis samples received over one calendar year were reviewed retrospectively by an expert in cytopathology blinded to the final clinical and/or histopathological diagnoses. Cases with discrepancies after review were noted. Sensitivity, specificity, and predictive values were calculated before and after review of slides. Data were analyzed using SPSS version 16.Results:Malignant etiology was identified in 49/115 cases (42.6%) with female genital tract being the most common site of malignancy (22, 44.8%). The remaining 66 (57.4%) had a benign etiology with hepatic cirrhosis in 42 cases (63.6%). A review revealed discrepancies in five cases, three of which were earlier called negative for malignant cells (one case each of ovarian adenocarcinoma, cecal adenocarcinoma, and cholangiocarcinoma). Two cases of ovarian adenocarcinoma that were reported as atypical/reactive mesothelial hyperplasia showed malignant cells upon review. Sensitivity and specificity after review were 69.4% and 100%, respectively, with 100% positive predictive value.Conclusion:Being a minimally invasive procedure, abdominal paracentesis continues to be an important diagnostic tool in guiding patient management. A proper morphological assessment with adequate clinical information and correlation with other investigations can be used to arrive at a definitive diagnosis in most cases. The term “atypical” can be misleading and is often used for want of clinical information and is best avoided.
OCCURRENCE OF SALMONELLA SPP. IN BROILER CHICKEN FECES IN THE CENTRAL REGION OF THE STATE OF MINAS GERAIS, BRAZIL
Authors: Júnior Lúcio Caio , Bittencourt Mathias Joana , Marcos Lauer Júnior Claudio , Jaqueline Viana Soares Flores Silvia , Martinez Xavier Alves Teixeira Fernanda 
Published: July 2019

Bacteria of the genus Salmonella are gram-negative rods, facultative anaerobic non-spore formers, which may or may not be flagellated. These bacteria are frequently detected in poultry products and are important in animal and public health. The purpose of this study was to investigate the occurrence of Salmonella spp. in feces from broiler chicken litters located in municipalities of the central region of the state of Minas Gerais, Brazil. The study analyzed 845 feces samples from different poultry farms collected between September 2016 and March 2017. Pre-enrichment broths, specific selective broths and selective indicator agar were used for the analyses. The suspected isolates were submitted to biochemical testing and serotyping with “O” and “H” antisera to identify the Salmonella serotypes. The results showed that 213 feces samples were contaminated with Salmonella, and the serotypes found were: S. Minnesota, S. Sandiego, S. Schwarzengrund, S. Infantis, S. Hadar, S. enterica subsp. enterica (O: 4.5), S. Montevideo, S. Miami, S. Heidelberg, S. Cerro, S. Ndolo, S. Panama, S. Anatum, S. Tennessee, S. Agona, S. Newport and S. Muenster. The Minnesota serotype was predominant among the isolates investigated. Actions to improve the biosafety of commercial poultry farms are necessary to prevent possible contamination of poultry products that endanger human health.
INSIGHTS INTO THE CURE CHEMISTRY OF BROMINATED BUTYL RUBBER
Authors: Parent J. Scott , Faba Michael A. J. , Tipnis Sagar J. , Whitney Ralph A. , Kulbaba Kevin 
Published: July 2019

ABSTRACT
The importance of dehydrobromination to the cure chemistry of brominated butyl rubber (BIIR) is demonstrated through a combination of cure rheometry studies and model compound experiments. These data show that, while HBr elimination to give an exomethylene conjugated diene is inevitable, subsequent reactivity is highly sensitive to acidity within the mixture. As a result, formulations containing acid scavengers such as epoxides or MgO produce cure dynamics and yields that differ markedly from those of unstabilized analogues. These differences in allyl cation reaction pathways underlie much of the known behavior of BIIR + ZnO compounds and have a substantial effect on the progress of sulfur-based cure formulations. In this report, allyl cation fragmentation and electrophilic addition mechanisms are developed from 1H nuclear magnetic resonance (NMR) and mass spectrometry analysis of model compounds, and their implications for sulfur, ZnO, and sulfur + ZnO vulcanization chemistry are detailed.