bluuebunny/crossref_metadata_2025 huggingface dataset:
Sol-gel Preparation of Hollow Spherical x%B-TiO2 Photocatalyst: The Effect of Boron Content on RBR X-3B Decoloration
Authors: Zhang Wenjie , Liu Yuxuan , Xin Hongliang
Published: November 2017

Background:

The potential of applying TiO2-based materials has been ascertained in both
wastewater and polluted air. Boron is proven to be an effective dopant to promote the activity of
TiO2 in our previous work. The density of hollow material is little larger than water so that the hollow
photocatalyst can suspend in wastewater under stirring or aeration.

Methods:

The graphical spheres were prepared from glucose using hydrothermal method. The hollow
spherical x%B-TiO2 was synthesized through a sol-gel route, using tetrabutyl titanate and tributyl
borate in the precursor. The materials were characterized by X-ray diffraction, scanning electron
microscope, infrared spectrum, X-ray photoelectron spectroscopy, and N2 adsorption-desorption
techniques. Photocatalytic degradation of RBR X-3B dye was studied to show the activity of the
x%B-TiO2 materials.

Results:

Anatase TiO2 phase forms in all the x%B-TiO2 samples despite the difference in boron content.
An absolute Ti4+ oxidation state exists in the x%B-TiO2, which is hardly affected by the doped
boron. XPS analysis proves the formation of B-Ti-O structure in anatase TiO2 lattice. BET surface
area increases with rising boron doping content in the hollow spherical x%B-TiO2 samples. Photocatalytic
activity of TiO2 is enhanced after doping boron. The photocatalytic efficiency on RBR X-
3B degradation reaches the maximum value when n(B)/n(Ti) is 8%. After five photocatalytic cycles,
decoloration efficiency on 8%B-TiO2 is as much as 80% of the initial value.

Conclusion:

A continuous expansion of TiO2 crystal happens with increasing boron content. The
Ti4+ oxidation state of titanium in the hollow spherical material is not changed after doping boron.
BET surface area of the hollow spherical x%B-TiO2 increases with rising boron doping content. The
hollow spherical 8%B-TiO2 has satisfactory performs for recycling and lifetime.
Intervention to Increase HIV Testing Among Substance-Using Young Men Who Have Sex With Men: Protocol for a Randomized Controlled Trial (Preprint)
Authors: Stephenson Rob , Bonar Erin E , Carrico Adam , Hunter Alexis , Connochie Daniel , Himmelstein Rebecca , Bauermeister Jose
Published: November 2017

BACKGROUND

Young men who have sex with men (YMSM) and transgender people in the Detroit Metro Area are the only risk group for whom the incidence of HIV and sexually transmitted infections (STI) has increased since 2000, with HIV incidence nearly doubling among youth. Substance use (including alcohol), which is relatively frequent among YMSM and transgender people, creates barriers to the optimal delivery of HIV prevention and care services. Standard HIV counseling, testing, and referral (CTR) is limited in providing strategies to identify and address substance use. Hence, in its current form, CTR may not be serving the prevention needs of substance-using YMSM and transgender people. Brief counseling interventions, grounded in principles of motivational interviewing, may offer a mechanism to meet the HIV prevention and care needs of substance-using YMSM and transgender people.

OBJECTIVE

This prospective, 4-arm, factorial randomized controlled trial aims to examine the efficacy of an motivational interviewing–based substance use brief intervention (SUBI) on participants’ substance use and engagement in HIV prevention.

METHODS

The research implements a prospective randomized controlled trial (Project Swerve) of 600 YMSM and transgender people recruited both online and in person. Eligibility criteria include participants who (1) are between the ages of 15 to 29 years, (2) live in the Detroit Metro Area, (3) self-identify as a man or transgender man or woman, (4) have had sexual contact with a man in the 6 months before enrollment, (5) self-report binge drinking or any substance use in the 3 months before enrollment, and (6) self-report an unknown or negative HIV status upon enrollment. Participants are randomized to receive, 3-months apart starting at baseline, 2 individual sessions. Sessions are CTR-only, SUBI-only, CTR followed by SUBI, or SUBI followed by CTR.

RESULTS

Project Swerve was launched in April 2017 and enrollment is ongoing.

CONCLUSIONS

Incorporating a SUBI that utilizes the principles of motivational interviewing into HIV CTR provides an opportunity to tailor counseling services for YMSM and transgender people to address additional client barriers to HIV and STI testing.

CLINICALTRIAL

ClinicalTrials.gov NCT02945436; http://clinicaltrials.gov/ct2/show/NCT02945436 (Archived by WebCite at http://www.webcitation.org/6yFyOK57w)
Using Mobile Technology to Improve Bone-Related Lifestyle Risk Factors in Young Women With Low Bone Mineral Density: Feasibility Randomized Controlled Trial (Preprint)
Authors: Subasinghe Asvini Kokila , Garland Suzanne Marie , Gorelik Alexandra , Tay Ilona , Wark John Dennis
Published: November 2017

BACKGROUND

Poor bone health in adolescent and young adult females is a growing concern. Given the widespread use of mobile phones in this population, mobile health (mHealth) interventions may help improve health behaviors related to bone health in young women.

OBJECTIVE

The goal of the study was to determine the acceptability and feasibility of an mHealth intervention called Tap4Bone in improving health behaviors associated with the risk of osteoporosis in young women.

METHODS

The Tap4Bone mHealth intervention comprised the use of mobile phone apps, short messaging service (text messaging), and Web emails to encourage health behavior changes. The education group received osteoporosis prevention education leaflets. Changes in the bone health–related behaviors exercise, smoking, and calcium intake were assessed. User experiences and acceptance of the app were collected through focus group interviews.

RESULTS

A total of 35 (22 completed, mean age 23.1 [SD 1.8] years) were randomized to either the mobile phone (intervention n=18) or education (control n=17) group. Although there were trends toward improvement in calcium intake, sports activity, and smoking behaviors in the mHealth intervention group compared to the education group, these were not statistically significant.

CONCLUSIONS

The Tap4Bone mHealth intervention was shown to be acceptable and feasible in subsets of the participants. The intervention should be improved upon using participant feedback to improve functionality. Findings from this study may aid in the development and modification of health care apps to reduce participant attrition.
Phenotypic Spectrum of Children with Nephronophthisis and Related Ciliopathies
Authors: König Jens , Kranz Birgitta , König Sabine , Schlingmann Karl Peter , Titieni Andrea , Tönshoff Burkhard , Habbig Sandra , Pape Lars , Häffner Karsten , Hansen Matthias , Büscher Anja , Bald Martin , Billing Heiko , Schild Raphael , Walden Ulrike , Hampel Tobias , Staude Hagen , Riedl Magdalena , Gretz Norbert , Lablans Martin , Bergmann Carsten , Hildebrandt Friedhelm , Omran Heymut , Konrad Martin ,   for the Gesellschaft für Pädiatrische Nephrologie (GPN)
Published: November 2017

Background and objectives

Genetic heterogeneity and phenotypic variability are major challenges in familial nephronophthisis and related ciliopathies. To date, mutations in 20 different genes (NPHP1 to -20) have been identified causing either isolated kidney disease or complex multiorgan disorders. In this study, we provide a comprehensive and detailed characterization of 152 children with a special focus on extrarenal organ involvement and the long-term development of ESRD.

Design, setting, participants, & measurements

We established an online-based registry (www.nephreg.de) to assess the clinical course of patients with nephronophthisis and related ciliopathies on a yearly base. Cross-sectional and longitudinal data were collected. Mean observation time was 7.5±6.1 years.

Results

In total, 51% of the children presented with isolated nephronophthisis, whereas the other 49% exhibited related ciliopathies. Monogenetic defects were identified in 97 of 152 patients, 89 affecting NPHP genes. Eight patients carried mutations in other genes related to cystic kidney diseases. A homozygous NPHP1 deletion was, by far, the most frequent genetic defect (n=60). We observed a high prevalence of extrarenal manifestations (23% [14 of 60] for the NPHP1 group and 66% [61 of 92] for children without NPHP1). A homozygous NPHP1 deletion not only led to juvenile nephronophthisis but also was able to present as a predominantly neurologic phenotype. However, irrespective of the initial clinical presentation, the kidney function of all patients carrying NPHP1 mutations declined rapidly between the ages of 8 and 16 years, with ESRD at a mean age of 11.4±2.4 years. In contrast within the non-NPHP1 group, there was no uniform pattern regarding the development of ESRD comprising patients with early onset and others preserving normal kidney function until adulthood.

Conclusions

Mutations in NPHP genes cause a wide range of ciliopathies with multiorgan involvement and different clinical outcomes.
Mesangial C4d Deposits in Early IgA Nephropathy
Authors: Segarra Alfons , Romero Katheryne , Agraz Irene , Ramos Natalia , Madrid Alvaro , Carnicer Clara , Jatem Elias , Vilalta Ramón , Lara Luis Enrique , Ostos Elena , Valtierra Naiara , Jaramillo Juliana , Arredondo Karla V. , Ariceta Gema , Martinez Cristina
Published: November 2017

Background and objectives

The prognostic value of mesangial C4d deposits in IgA nephropathy has been analyzed in patients with reduced GFR but has not been analyzed in those with normal kidney function. The main objective of the study was to analyze the prognostic value of C4d deposits and association with response to treatment in patients with IgA nephropathy and normal GFR.

Design, setting, participants, & measurements

This retrospective cohort study included 190 patients with idiopathic IgA nephropathy diagnosed by kidney biopsy between 1988 and 2005. The patients had GFR≥80 ml/min per 1.73 m2 at the time of diagnosis, and they had a paraffin-embedded kidney biopsy with eight glomeruli available.

Results

In total, 170 (89%) and 20 (11%) patients were >18 and <18 years old, respectively; median (interquartile range) follow-up was 15 (12–22) years. Mesangial C4d deposit prevalence was 20% (38 of 190). At diagnosis, C4d-positive versus -negative patients had higher protein-to-creatinine ratio (median [interquartile range]: 1.94 g/g [0.9–3.1] versus 1.45 g/g [0.9–2.2]; P=0.04). During follow-up, C4d-positive patients showed a higher number of nephritic flares (median [range]: 1.4 [0–5] versus 0.9 [0–2]; P=0.04), had a higher protein-to-creatinine ratio (median [interquartile range]: 1.32 g/g [0.7–1.7] versus 0.89 g/g [0.1–1.3]; P<0.01), were more prone to receive repeated treatment with corticosteroids (45% versus 24%; P<0.01), and showed a larger reduction in eGFR (−1.6 versus −0.8 ml/min per 1.73 m2 per year; P=0.04). Furthermore, the presence of mesangial C4d deposits was an independent predictor of long-term kidney survival.

Conclusions

C4d deposits may be one of the earliest poor prognostic variables available for patients with idiopathic IgA nephropathy and normal kidney function at the time of diagnosis. However, Cd4 deposits alone are not associated with the response to angiotensin blockers or corticosteroid treatment.
Prevalence of Novel MAGED2 Mutations in Antenatal Bartter Syndrome
Authors: Legrand Anne , Treard Cyrielle , Roncelin Isabelle , Dreux Sophie , Bertholet-Thomas Aurélia , Broux Françoise , Bruno Daniele , Decramer Stéphane , Deschenes Georges , Djeddi Djamal , Guigonis Vincent , Jay Nadine , Khalifeh Tackwa , Llanas Brigitte , Morin Denis , Morin Gilles , Nobili François , Pietrement Christine , Ryckewaert Amélie , Salomon Rémi , Vrillon Isabelle , Blanchard Anne , Vargas-Poussou Rosa
Published: November 2017

Background and objectives

Mutations in the MAGED2 gene, located on the X chromosome, have been recently detected in males with a transient form of antenatal Bartter syndrome or with idiopathic polyhydramnios. The aim of this study is to analyze the proportion of the population with mutations in this gene in a French cohort of patients with antenatal Bartter syndrome.

Design, setting, participants, & measurements

The French cohort of patients with antenatal Bartter syndrome encompasses 171 families. Mutations in genes responsible for types 1–4 have been detected in 75% of cases. In patients without identified genetic cause (n=42), transient antenatal Bartter syndrome was reported in 12 cases. We analyzed the MAGED2 gene in the entire cohort of negative cases by Sanger sequencing and retrospectively collected clinical data regarding pregnancy as well as the postnatal outcome for positive cases.

Results

We detected mutations in MAGED2 in 17 patients, including the 12 with transient antenatal Bartter syndrome, from 16 families. Fifteen different mutations were detected (one whole deletion, three frameshift, three splicing, three nonsense, two inframe deletions, and three missense); 13 of these mutations had not been previously described. Interestingly, two patients are females; in one of these patients our data are consistent with selective inactivation of chromosome X explaining the severity. The phenotypic presentation in our patients was variable and less severe than that of the originally described cases.

Conclusions

MAGED2 mutations explained 9% of cases of antenatal Bartter syndrome in a French cohort, and accounted for 38% of patients without other characterized mutations and for 44% of male probands of negative cases. Our study confirmed previously published data and showed that females can be affected. As a result, this gene must be included in the screening of the most severe clinical form of Bartter syndrome.
Association between Urine Ammonium and Urine TGF-β1 in CKD
Authors: Raphael Kalani L. , Gilligan Sarah , Hostetter Thomas H. , Greene Tom , Beddhu Srinivasan
Published: November 2017

Background and objectives

Urinary ammonium excretion increases in response to nonvolatile acids to maintain normal systemic bicarbonate and pH. However, enhanced ammonia production promotes tubulointerstitial fibrosis in animal models. Therefore, a subset of individuals with CKD and normal bicarbonate may have acid-mediated kidney fibrosis that might be better linked with ammonium excretion than bicarbonate. We hypothesized that urine TGF-β1, as an indicator of kidney fibrosis, would be more tightly linked with urine ammonium excretion than serum bicarbonate and other acid-base indicators.

Design, setting, participants, & measurements

We measured serum bicarbonate and urinary ammonium, titratable acids, pH, and TGF-β1/creatinine in 144 persons with CKD. Multivariable-adjusted linear regression models determined the cross-sectional association between TGF-β1/creatinine and serum bicarbonate, urine ammonium excretion, urine titratable acids excretion, and urine pH.

Results

Mean eGFR was 42 ml/min per 1.73 m2, mean age was 65 years old, 78% were men, and 62% had diabetes. Mean urinary TGF-β1/creatinine was 102 (49) ng/g, mean ammonium excretion was 1.27 (0.72) mEq/h, mean titratable acids excretion was 1.14 (0.65) mEq/h, mean urine pH was 5.6 (0.5), and mean serum bicarbonate was 23 (3) mEq/L. After adjusting for eGFR, proteinuria, and other potential confounders, each SD increase of urine ammonium and urine pH was associated with a statistically significant 1.22-fold (95% confidence interval, 1.11 to 1.35) or 1.11-fold (95% confidence interval, 1.02 to 1.21) higher geometric mean urine TGF-β1/creatinine, respectively. Each SD increase of serum bicarbonate and urine titratable acids was associated with a nonsignificant 1.06-fold (95% confidence interval, 0.97 to 1.16) or 1.03-fold (95% confidence interval, 0.92 to 1.14) higher geometric mean urine TGF-β1/creatinine, respectively.

Conclusions

Urinary ammonium excretion but not serum bicarbonate is associated with higher urine TGF-β1/creatinine.
CARACTERÍSTICAS QUE SE ASOCIAN CON LA OMISIÓN DEL DESAYUNO EN ADOLESCENTES MONTEVIDEANOS QUE CONCURREN A COLEGIOS PRIVADOS
Authors: Ceriani- Infantozzi Florencia , De León-Giordano Carolina
Published: November 2017

El objetivo del artículo es conocer las características que se asocian a la omisión del desayuno de adolescentes de 11 a 17 años que asisten a colegios privados de Montevideo. Estudio transversal, descriptivo, analítico mediante el uso de una base de datos secundaria. Se estudió la asociación entre la omisión del desayuno y diferentes variables, con 696 estudiantes y luego con la submuestra de 196 que omiten desayunar.  Se calculó Test t de Student, se aplicó el test chi cuadrado de Pearson. Para identificar el riesgo se calculó el OR. Valor significancia estadística p < 0,05. Procesamiento y análisis estadístico SPSS versión 21.0. El 28.2% de los adolescentes omitió desayunar. La probabilidad de omitir el desayuno con respecto a no omitirlo es aproximadamente 2,25 más alto en los adolescentes que se encuentran solos con respecto a los que se encuentran acompañados. Entre quienes omitían el desayuno un 40.4% presentó sobrepeso u obesidad, siendo mayor esta cifra en los que tenían 13 años o menos (p= 0.002). El motivo más mencionado para omitir el desayuno fue “levantarse tarde y no tener tiempo”. La edad y el sexo se asociaron significativamente con el motivo mencionado. La omisión del desayuno es un problema en esta población. El sobrepeso y obesidad es una complicación de gran magnitud entre quienes omiten desayunar. Estar sólo en este tiempo de comida aumenta las chances de omitirlo.
POESÍA Y CUIDADOS: UN INSTRUMENTO PARA LA GESTIÓN DE EMOCIONES Y SENTIMIENTOS EN ENFERMERÍA
Authors: Siles-González José
Published: November 2017

El objetivo de este estudio consiste en desarrollar una herramienta de reflexión emocional y de sentimientos que contribuyan a la gestión emocional y de los sentimientos de los alumnos de enfermería en sus prácticas clínicas. El método empleado ha consistido en utilizar un grupo de poemas derivados de experiencias clínicas como base para la identificación y análisis de emociones y sentimientos. Asimismo, se emplearon las orientaciones de Vigotsky y  Heller para facilitar el análisis de las emociones y los sentimientos. Resultados: Más allá de la concienciación de los futuros profesionales de la importancia de centrar el cuidado en el paciente, el gran reto consiste en dotar a los enfermeros de la capacidad cognitiva y las destrezas emocionales necesarias para gestionar el aluvión de sentimientos complejos e intensos que emergen durante la aplicación del proceso de enfermería con el fin de prepararlos para el trabajo emocional inherente a su trabajo y disminuir el riesgo de “burn out”.  Conclusiones: los poemas inspirados en experiencias clínicas constituyen una herramienta pertinente para facilitar el trabajo emocional y de sentimientos generados durante las prácticas clínicas.
Estimasi Water Influx dan Luas Aquifer di Lapangan X
Authors: Novrianti Novrianti
Published: November 2017

Water Influx adalah air yang merembes ke dalam reservoir. Water Influx terjadi untuk mengimbangi gejala penurunan tekanan yang terjadi di reservoir karena masuknya air berfungsi untuk menggantikan minyak yang diproduksikan. Water Influx perlu diperhatikan untuk mengetahui luas aquifer serta pengaruhnya terhadap tingkat perolehan ( recovery factor). Lapangan X mulai produksi tahun 1955 dan injeksi air mulai dilakukan tahun 1974. Estimasi perhitungan Water influx pada lapangan X dilakukan dengan menggunakan persamaan  material balance dan metode Hurst – Van Everdingen. Selain menentukan Water influx metode Hurst – Van Everdingen juga berfungsi untuk menentukan bentuk dan luas aquifer. Kumulatif water influx yang diperoleh dengan menggunakan Metode Material Balance adalah 30 MMMSTB  sedangkan dengan metode Hurst – Van Everdingen adalah 32 MMMSTB. Bentuk aquifer lapangan X adalah  finite aquifer dengan rD = 8  dan Luas aquifer lapangan  X adalah 241016,62 ft.
Perkiraan Luas Reservoir Panas Bumi dan Potensi Listrik Pada Tahap Eksplorasi (Studi Kasus Lapangan X)
Authors: Novriansyah Adi
Published: November 2017

Salah satu parameter penting dalam pengembangan lapangan panas bumi disektor listrik adalah besarnya potensi listrik di reservoir. Potensi listrik ini dijadikan sebagai panduan awal dalam rencana kapasitas pembangkit yang akan dibangun. Penentuan potensi listrik ini akan menjadi sulit jika data luas reservoir belum ada. Studi ini menggunakan data pengukuran tekanan dan temperature di sumur-sumur eksplorasi pada lapangan X. Dari data temperature dibuat menjadi peta iso temperature. Berdasarkan peta iso temperature, luas reservoir Lapangan X diperkirakan 20 km2. Hasil kalkulasi potensi listrik menunjukkan Lapangan X mempunyai potensi listrik 40 MWe selama 30 tahun. Ini berarti kapasitas pembangkit maksimum di lapangan X adalah 40 MWe.
Pemilihan Pompa Electric Submersible Pump Menggunakan Metode Analytical Hierarchy Process (Studi Kasus Lapangan Zaryka)
Authors: Ariyon Muhammad
Published: November 2017

Lapangan Zaryka merupakan salah satu lapangan minyak pada cekungan Sumatera Tengah. Untuk meningkatkan produksi minyaknya, digunakan pompa benam listrik bawah permukaan (Electric Submersible Pump). Pompa ESP merupakan salah satu jenis artificial lift yang digunakan untuk memproduksikan minyak bumi ke permukaan. Permasalahannya, terdapat berbagai produk ESP yang dipasarkan dengan berbagai jenis,k tipe, dan keunggulan yang bervariasi. Keberagaman ini menyulitkan bagi perusahaan untuk menentukan produk pompa ESP mana yang tepat untuk digunakan. Metode Analytical Hierarchy Process dapat dipergunakan untuk membantu dalam memilih pompa ESP. Terdapat tiga faktor utama yang menjadi pertimbangan yaitu daya tahan produk, pengalaman dan reputasi dan jumlah maintenance, sementara untuk elemen alternatif terdapat empat produk pompa yaitu Centraleft, Motherford, Red-A dan Wooden Group. Hasil analisa menunjukkan bahwa faktor utama yang menjadi pertimbangan dalam pemilihan pompa ESP adalah faktor daya tahan produk (56%), faktor jumlah maintanance (32%), dan faktor pengalaman dan reputasi (12%). Ditinjau dari berbagai faktor, alternatif pompa Red-A merupakan alternatif pompa terbaik (35%), pompa Centraleft (29%), pompa Motherford (19%) dan pompa Wooden Group (16%).
Penentuan Absolute Open Flow Pada Akhir Periode Laju Alir Plateau Sumur Gas
Authors: Novrianti Novrianti
Published: November 2017

Penentuan laju alir plateau dan lama waktu plateau adalah syarat utama dalam proses bisnis lapangan gas yang di tentukan oleh hasil evaluasi keekonomian. Penelitian ini untuk menentukan besarnya laju alir produksi gas ( Absolute Open Flow ) pada reservoir gas dengan tenaga dorong air dengan menggunakan simulator. Laju alir produksi gas diperoleh dari model reservoir 2- D untuk aliran dua fasa ( air dan gas ) dan melakukan analisa sensitivitas permeabilitas absolute ( k), rasio permeabilitas vertical dengan permeabilitas horizontal ( kv/ kh), ketebalan aquifer dan radius aquifer.  Semakin kecil permeabilitas batuan maka AOF yang diperoleh juga berharga kecil. Untuk permeabilitas rendah kenaikan permeabilitas dari 10 mD menjadi 30 mD akan mengakibatkan AOF naik sebesar 23.201 MMscf/d sedangkan kenaikan  permeabilitas dari 100 mD menjadi 300 mD akan mengakibatkan AOF naik sebesar 216.821 MMscf/d. Pada permeabilitas rendah yaitu 10 mD, perubahan  rasio kv/kh dari 0.1 menjadi  rasio kv/kh 0.3 akan mengakibatkan kenaikan AOF sebesar 0.894 MMscf/d sedangkan pada permeabilitas tinggi yaitu 500 mD perubahan rasio kv/kh dari 0.1 menjadi  rasio kv/kh 0.3 akan mengakibatkan kenaikan AOF sebesar 35.346 MMscf/d. Untuk permeabilitas 10 mD dan rasio kv/kh 1 perubahan ketebalan 50 ft menjadi 250 ft akan mengakibatkan perubahan AOF sebesar  0.065 MMscf/d dan  perubahan ketebalan 250 ft menjadi 500 ft akan mengakibatkan perubahan AOF sebesar 0.887MMscf/d. Perbedaan radius aquifer tidak berpengaruh terhadap nilai AOF.
Pengaruh Penurunan Permeabilitas Terhadap Laju Injeksi Polimer Pada Lapangan Y
Authors: Novriansyah Adi
Published: November 2017

Injeksi polimer merupakan injeksi air yang disempurnakan. Penambahan polimer ke dalam air injeksi bertujuan untuk memperbaiki sifat fluida pendesak untuk meningkatkan perolehan minyak. Akan tetapi mekanisme pendesakannya sangat kompleks. Salah satu kendalanya adalah terjadi pengurangan permeabilitas. Pengurangan permeabilitas sebenarnya merupakan dampak yang ditimbulkan pada aliran fluida dalam media berpori. Penelitian ini  akan membahas mengenai efek pengurangan permeabilitas terhadap laju injeksi polimer dengan berbagai kenaikan viskositas. Hasil penelitian memperlihatkan efek pengurangan permeabilitas akan berdampak pada penurunan laju injeksi polimer. Selain itu, dengan meningkatnya viskositas, Juga berdampak pada penurunan laju injeksi polimer.
Interpretasi Fasies Pengendapan Formasi Tondo, Pulau Buton, Sulawesi Tenggara Berdasarkan Data Pemetaan Geologi dan Potensinya Sebagai Batuan Reservoir Minyakbumi
Authors: Yuskar Yuniarti
Published: November 2017

Daerah penelitian berada di Pulau Buton Provinsi Sulawesi Tenggara. Fokus penelitian pada bagian selatan Pulau Buton yaitu daerah Gonda dan Sekitarnya. Secara geografis terletak antara 122° 42’ 28’’ BT - 122° 48’ 00’’ BT dan 5° 25’ 28” LS - 05° 25’ 28” LS. Penelitian ini bertujuan mengetahui stratigrafi dan fasies pengendapan pada Formasi Tondo. Formasi Tondo menarik untuk dipelajari karena merupakan reservoir utama pada Cekungan Buton. Metodologi yang digunakan yaitu penelitian lapangan dengan mengambil conto batuan yang kemudian dilakukan analisis laboratorium mikropaleontologi dan laboratorium petrografi. Selain itu digunakan juga data-data dari peneliti terdahulu sebagai penunjang dalam interpretasi geologi. Formasi Tondo pada daerah penelitian setara dengan Satuan batupasir kerikilan. Satuan ini tersusun oleh batupasir kerikilan, batupasir sisipan batulempung dan konglomerat yang didominasi oleh batupasir kerikilan. Umur Satuan ini berdasarkan analisis laboratorium mikropaleontologi yaitu berumur Miosen Akhir (N17 – N18). Formasi Tondo merupakan reservoi utama di daerah Buton memiliki porositas yang baik sekitar 8 hingga 25% dengan rata-rata 10% dan maksimum permeabilitas 172mD. Sistem pengendapan pada batupasir kerikilan ini merupakan sistem pengendapan tuirbidit terlihat dari adanya campuran butiran kasar dan halus serta dipengaruhi oleh lingkungan laut terlihat dari batuan yang bersifat karbonatan. Batupasir kerikilan sampai konglomerat merupakan hasil pengendapan channel dilaut dalam.
Aplikasi Kurva Derivative Dalam Penentuan Batas Reservoir Pada Sistem Reservoir Lensa
Authors: Hidayat Fiki
Published: November 2017

Reservoir lensa merupakan reservoir yang memiliki bentuk menyerupai lensa dan memiliki sifat reservoir yang tertutup. Saat ini, reservoir dengan tipe lensa mulai banyak diproduksikan. Studi mengenai reservoir lensapun telah banyak dilakukan untuk dapat lebih memahami kelakuan reservoir ini. Untuk memperoleh analisa lebih baik mengenai reservoir lensa ini diperlukan studi-studi yang tepat sehingga pengembangan lapangan dengan reservoir ini berjalan dengan baik. Analisa yang dilakukan salah satunya adalah analisa mengenai batas reservoir dengan menggunakan kurva derivative pada reservoir lensa ini. Untuk itu, yang perlu dilakukan adalah membuat model reservoir lensa dan melakukan simulasi untuk dapat memperkirakan kelakuan dari reservoir ini. Data yang diperlukan antara lain: tekanan reservoir, waktu produksi, batas reservoir , properti fluida, dan properti batuan. Dari data tersebut kemudian digunakan software simulasi reservoir CMG untuk memperoleh data tekanan dari sumur uji dan software Saphire untuk interpretasi dari data tekanan yang diperoleh. Pada penelitian  ini akan dibahas tentang identifikasi dan analisa batas reservoir untuk reservoir dengan tipe lensa dengan menggunakan model ideal pada software Saphire. Selain itu, akan dibahas pula bentuk kurva derivative yang dihasilkan dari reservoir lensa.
Perhitungan Analisis Sistem Nodal Untuk Menentukan Laju Alir Minyak Dengan Meningkatkan Range Efesiensi Electric Submercible Pump Pada Sumur di Lapangan Minyak PT. BOB. BSP - Pertamina Hulu
Authors: Musnal Ali , Melisa Richa
Published: November 2017

Dengan berjalannya waktu produksi, tekanan reservoir akan mengalami penurunan. Untuk mengatasi hal tersebut diatas dipergunakan pengangkatan buatan yang dikenal dengan “Artificial Lift”. Pada sumur di BOB PT.BSP- Pertamina Hulu Zamrud pada umumnya mempergunakan pompa electric submercible pump (ESP) sebagai pengangkatan buatan. Pompa ESP ini pada periode tertentu juga mengalami penurunan kemampuan untuk mengangkat fluida. Hal ini disebabkan karena berkurangnya kemampuan dari tekanan reservoir, terjadinya over load atau under load pada pompa, karena jumlah stages yang dipasang tidak tepat, dan disamping itu terjadinya kerusakan pada peralatan produksi itu sendiri.

 

Penelitian ini menghitung Range efesiensi pompa terpasang, mengevaluasi kemampuan pompa ditandai besarnya laju produksi, menghitung jumlah stages dan Horse power pompa yang terpasang. Perhitungan mempergunakan metoda Analisa System Nodal, dimana titik nodalnya terletak didasar sumur. Berdasarkan hasil perhitungan range efesiensi pompa dari 4 sumur kajian, terdapat 2 pompa yang bekerja sesuai range efesiensinya dan pompa pada 2 sumur  lainnya  yaitu sumur F-02 dan F-04 mempunyai laju produksi 2500 stb/d dan 1450 stb/d. Pompa ini bekerja di bawah range efisiensi kalau kondisi ini diabaikan terus akan terjadi kerusakan pada pompa karena “downthrust” pada sumur F-02 dan F-04 agar meningkatkan laju produksi dan menghindari pompa bekerja pada kondisi downtrush maka dari hasil analisa sebaiknya ditambahkan panjang stage dari 44 stage menjadi 75 stage pada sumur F-02 dan 120 stage menjadi 150 stage pada sumur F-04.

Kata Kunci: Range Efesiensi, Laju Produksi, PI, Stage dan Horse Power.
Analisis Performance Sumur X Menggunakan Metode Standing Dari Data Pressure Build Up Testing
Authors: Novrianti Novrianti
Published: November 2017

The number of production wells refers to the performance of the well, which is shown in the graph of inflow performance relationship (IPR). Reservoir characteristics influence on performance of the well, type of welltest and methods that be used in the determination of IPR. By using the IPR curves, maximum flow rate and the optimal flow rate of the well will be known. Pressure Build Up test is used to know performance and a maximum flow rate of the X well. Well test conducted for 15 hours. The well produced at a constant flow rate than close the wellhead. The Pressure data and time data obtained from the well test. The result of Pressure build-up testing analysis among permeability, skin and flow efficiency. After analyzing the Pressure build-up testing permeability obtained 190 mD, skin + 1,68 and 0,83 flow efficiency. Based on the value of flow efficiency Standing method is the most appropriate method is used to analyze the productivity of X well. Standing appropriate method for wells with skin ≠ 0 and flow efficiency ≠ 1. The maximum flow rate of the X well using Standing Method on the 0,83 flow efficiency was 13,91 MMSCFD
Analisis Kinerja Tenaga Pendorong Reservoir dan Perhitungan Water Influx pada Perolehan Minyak Tahap Primer (Studi Kasus Lapangan Falipu)
Authors: Herawati Ira
Published: November 2017

Primary recovery is the stage of oil production by relying on the natural ability of the driving force of the reservoir. Kind of driving force that is water drive reservoir, depletion drive, segregation drive and a combination drive. The pressure drop occurred along its produced oil from the reservoir. Reservoir so that the driving force is the main parameter in maintaining reservoir pressure balance. Through the concept of material balance is the determination of the type of propulsion quifer reservoir and the power that generates driving force parameter analysis capability and aquifer in oil producing naturally. Then do the forecasting production to limit the ability of primary recovery production phase. Combination drive depletion of water drive and the drive is a driving force in the dominant reservoir Falipu Fields with a strongly water aquifer types of drives obtained through material balance equation. Calculations using the method of water influx Havlena & Odeh used as a correction factor for determining the type of propulsion reservoir and aquifer strength. Forecasting production in the Field Falipu generate recovery factor of 41% with a pressure boundary in 2050.
Analisis Peningkatan Produksi Pada Sumur Minyak Dengan Metode Partial Water Shut Off Dalam Meningkatkan Rasio Keberhasilan Partial Water Shut Off Pada Lapangan Hawa
Authors: Fitrianti Fitrianti
Published: November 2017

From year to year the number of oil production will be reduced and the amount of water production will grow, so will cause problems in managing the water. Some of the problems that arise are limitations in the surface water treatment systems, the availability of water treatment chemicals, and declining well productivity. Doing some work over to lower the value of water production and increase the value of oil production, one of which is the partial water shut off. On the hawa field, some job well done partial water shut off. The results of such work nothing works and nothing failed. Analysis performed on the job partial water shut off with the observation of the historycompletion and the processing of data and calculation of the value of production history OOIP to get the value of remaining reserves. After analysis, it was found some causes of work partial water shut off the well would be successful if it fulfills several criteria such as: the value of remaining reserves are still large enough, she had never done work partial water shut off in the layer and selecting the type of isolation right tool. While the cause of such failures is that the well had done work partial water shut off the same perforation interval. The criteria are very important and necessary in deciding the work partial water shut off the a better well done or not.
Ankyloblepharon Filiforme Adnatum with a bilateral cleft lip and palate
Authors: Stankovic-Babic Gordana , Vujanovic Milena , Cekic Sonja
Published: November 2017

Introduction. Ankyloblepharon filiforme adnatum (AFA) is a rare congenital abnormality of the eyelids that has been reported as an isolated anomaly, but may also be associated with other anomalies or as a part of well-defined syndromes. The aim of this work was to present a case of familial AFA associated with bilateral cleft lip and palate. Case outline. A full-term female newborn (40 weeks? GA, BM 3,700 g) had bilateral partially fused eyelids at birth, associated with a cleft lip and palate. The surgical treatment was performed five days after AFA was diagnosed. The baby?s mother also had AFA, without a cleft lip or palate. The baby girl has been followed up by a plastic surgeon, a specialist in orthodontics, as well as an ophthalmologist and a pediatrician. Conclusion. This case indicates familial clustering of AFA, whereby it assumes a more severe form in the following generation. A cleft lip and palate in our patient has required surgical treatment, oral and dental rehabilitation, as well as the need for more intensive care and regular follow-ups by multidisciplinary teams.
The prevalence of resistance to macrolides and lincosamides among community- and hospital- acquired staphylococci and streptococci isolates in southeast Serbia
Authors: Misic Milena , Arsovic Aleksandra , Cukic Jelena , Rosic Milenko , Tosic-Pajic Jelena , Manojlovic Nevena , Cekerevac Ivan , Vidanovic Dejan , Sekler Milanko , Baskic Dejan
Published: November 2017

Introduction/Objective. The increasing resistance to macrolides and lincosamides among staphylococci and streptococci is becoming a global problem. The aim of this study was to investigate the prevalence of macrolide-lincosamide-streptogramin (MLS) resistance phenotypes in staphylococcal and streptococcal isolates in southeast Serbia. Methods. The MLS phenotypes were determined by the double-disk diffusion method in 2,121 inpatient and outpatient staphylococcal and streptococcal isolates collected during a one-year period at the Center for Microbiology. Results. The methicillin-resistant staphylococci isolates were significantly more resistant to penicillin, erythromycin, clindamycin, gentamicin, and ciprofloxacin (100%, 100%, 29.2%, 65.6%, and 53.1%, respectively) than the methicillin-sensitive ones (93.6%, 64.9%, 12%, 28.9%, and 11.7%, respectively). The inducible clindamycin resistance phenotype was dominant in S. aureus and coagulase-negative staphylococci isolates. S. pneumoniae, S. pyogenes, and S. agalactiae isolates showed very high resistance to erythromycin (77.8%, 46.2%, and 32.4%, respectively). All staphylococci and streptococci isolates were sensitive to vancomycin and linezolid, and all beta-hemolytic streptococci isolates to penicillin and ceftriaxone. Conclusion. The phenotypic triage of staphylococci is necessary in order to separate inducible resistant and truly clindamycin-sensitive isolates. Macrolides should not be recommended for empirical therapy of streptococcal infections. Penicillins remain the drug of choice for treatment of streptococcal infections in our local area.
N-Glycan Profile and Kidney Disease in Type 1 Diabetes
Authors: Bermingham Mairead L. , Colombo Marco , McGurnaghan Stuart J. , Blackbourn Luke A.K. , Vučković Frano , Pučić Baković Maja , Trbojević-Akmačić Irena , Lauc Gordan , Agakov Felix , Agakova Anna S. , Hayward Caroline , Klarić Lucija , Palmer Colin N.A. , Petrie John R. , Chalmers John , Collier Andrew , Green Fiona , Lindsay Robert S. , Macrury Sandra , McKnight John A. , Patrick Alan W. , Thekkepat Sandeep , Gornik Olga , McKeigue Paul M. , Colhoun Helen M.
Published: November 2017

OBJECTIVE

Poorer glycemic control in type 1 diabetes may alter N-glycosylation patterns on circulating glycoproteins, and these alterations may be linked with diabetic kidney disease (DKD). We investigated associations between N-glycans and glycemic control and renal function in type 1 diabetes.

RESEARCH DESIGN AND METHODS

Using serum samples from 818 adults who were considered to have extreme annual loss in estimated glomerular filtration rate (eGFR; i.e., slope) based on retrospective clinical records, from among 6,127 adults in the Scottish Diabetes Research Network Type 1 Bioresource Study, we measured total and IgG-specific N-glycan profiles. This yielded a relative abundance of 39 total (GP) and 24 IgG (IGP) N-glycans. Linear regression models were used to investigate associations between N-glycan structures and HbA1c, albumin-to-creatinine ratio (ACR), and eGFR slope. Models were adjusted for age, sex, duration of type 1 diabetes, and total serum IgG.

RESULTS

Higher HbA1c was associated with a lower relative abundance of simple biantennary N-glycans and a higher relative abundance of more complex structures with more branching, galactosylation, and sialylation (GP12, 26, 31, 32, and 34, and IGP19 and 23; all P < 3.79 × 10−4). Similar patterns were seen for ACR and greater mean annual loss of eGFR, which were also associated with fewer of the simpler N-glycans (all P < 3.79 × 10−4).

CONCLUSIONS

Higher HbA1c in type 1 diabetes is associated with changes in the serum N-glycome that have elsewhere been shown to regulate the epidermal growth factor receptor and transforming growth factor-β pathways that are implicated in DKD. Furthermore, N-glycans are associated with ACR and eGFR slope. These data suggest that the role of altered N-glycans in DKD warrants further investigation.
Using Cross-Polarized Photography as a Guide for Selecting Resin Composite Shade
Authors: Villavicencio-Espinoza CA , Narimatsu MH , Furuse AY
Published: November 2017

The restoration of single discolored maxillary anterior teeth is still a difficult task, as not only shape and surface characterization play an important role in the success of the treatment, but the propagation of light throughout the restorative material does as well. In some cases, small changes in morphology, color, and brightness will be noticeable. These factors are sometimes very tricky, and shade guides alone are difficult to use for color selection. This article proposes a protocol of employing cross-polarization imaging for improving the accuracy of the shade selection of resin composites. The step-by-step technique is presented for the restoration of a single discolored tooth.
Marginal Gap Formation in Approximal “Bulk Fill” Resin Composite Restorations After Artificial Ageing
Authors: Peutzfeldt A , Mühlebach S , Lussi A , Flury S
Published: November 2017

The aim of this in vitro study was to investigate the marginal gap formation of a packable “regular” resin composite (Filtek Supreme XTE [3M ESPE]) and two flowable “bulk fill” resin composites (Filtek Bulk Fill [3M ESPE] and SDR [DENTSPLY DeTrey]) along the approximal margins of Class II restorations. In each of 39 extracted human molars (n=13 per resin composite), mesial and distal Class II cavities were prepared, placing the gingival margins below the cemento-enamel junction. The cavities were restored with the adhesive system OptiBond FL (Kerr) and one of the three resin composites. After restoration, each molar was cut in half in the oro-vestibular direction between the two restorations, resulting in two specimens per molar. Polyvinylsiloxane impressions were taken and “baseline” replicas were produced. The specimens were then divided into two groups: At the beginning of each month over the course of six months' tap water storage (37°C), one specimen per molar was subjected to mechanical toothbrushing, whereas the other was subjected to thermocycling. After artificial ageing, “final” replicas were produced. Baseline and final replicas were examined under the scanning electron microscope (SEM), and the SEM micrographs were used to determine the percentage of marginal gap formation in enamel or dentin. Paramarginal gaps were registered. The percentages of marginal gap formation were statistically analyzed with a nonparametric analysis of variance followed by Wilcoxon-Mann-Whitney tests and Wilcoxon signed rank tests, and all p-values were corrected with the Bonferroni-Holm adjustment for multiple testing (significance level: α=0.05). Paramarginal gaps were analyzed descriptively. In enamel, significantly lower marginal gap formation was found for Filtek Supreme XTE compared to Filtek Bulk Fill (p=0.0052) and SDR (p=0.0289), with no significant difference between Filtek Bulk Fill and SDR (p=0.4072). In dentin, significantly lower marginal gap formation was found for SDR compared to Filtek Supreme XTE (p<0.0001) and Filtek Bulk Fill (p=0.0015), with no significant difference between Filtek Supreme XTE and Filtek Bulk Fill (p=0.4919). Marginal gap formation in dentin was significantly lower than in enamel (p<0.0001). The percentage of restorations with paramarginal gaps varied between 0% and 85%, and for all three resin composites the percentages were markedly higher after artificial ageing. The results from this study suggest that in terms of marginal gap formation in enamel, packable resin composites may be superior to flowable “bulk fill” resin composites, while in dentin some flowable “bulk fill” resin composites may be superior to packable ones.
A Class by Herself
Authors: Woloch Nancy
Published: November 2017

This book explores the historical role and influence of protective legislation for American women workers, both as a step toward modern labor standards and as a barrier to equal rights. Spanning the twentieth century, the book tracks the rise and fall of women-only state protective laws—such as maximum hour laws, minimum wage laws, and night work laws—from their roots in progressive reform through the passage of New Deal labor law to the feminist attack on single-sex protective laws in the 1960s and 1970s. The book considers the network of institutions that promoted women-only protective laws, such as the National Consumers' League and the federal Women's Bureau; the global context in which the laws arose; the challenges that proponents faced; the rationales they espoused; the opposition that evolved; the impact of protective laws in ever-changing circumstances; and their dismantling in the wake of Title VII of the Civil Rights Act of 1964. Above all, the book examines the constitutional conversation that the laws provoked—the debates that arose in the courts and in the women's movement. Protective laws set precedents that led to the Fair Labor Standards Act of 1938 and to current labor law; they also sustained a tradition of gendered law that abridged citizenship and impeded equality for much of the century. Drawing on decades of scholarship, institutional and legal records, and personal accounts, the book sets forth a new narrative about the tensions inherent in women-only protective labor laws and their consequences.
Roots of Protection: The National Consumers’ League and Progressive Reform
Authors: Woloch Nancy
Published: November 2017

This chapter describes the context in which the Progressive campaign for protective laws arose, assessing reformers' rationales and the oppositions they faced. Passage of the 1893 Illinois law marked the start of the Progressive Era campaign for protective labor laws. Through law, reformers hoped to impose standards on factories and improve the lives of industrial workers. Resistance to laws that affected men—from courts, legislators, unions, and public opinion—made protective laws for women and children imperative; reformers hoped that they would provide precedents for more “general” laws. Thus, single-sex laws became a crucial link in protectionist plans. The campaign for protective laws involved a range of supporters but rested largely on a dynamic organization, the National Consumers' League (NCL), and its determined leader, Florence Kelley (1859–1932), and the small group of activists that shaped its development.
ESTUDIO DEL COMPORTAMIENTO DE COMPRA DE LOS ASOCIADOS Y CLIENTES DEL SERVICIO DE SUPERMERCADO DE UNA COOPERATIVA, APLICANDO REGLAS DE ASOCIACIÓN
Authors: Romero Olga Lucía Fernández , Granados Luis Armando Portilla , Bautista José Orlando Maldonado
Published: November 2017

La generación creciente de importantes volúmenes de datos, como resultado de la actividad de la empresa, ha obligado de forma generalizada al uso de recursos informáticos que permitan su tratamiento y disponibilidad, creando una cultura de confianza y uso adecuado de la información.  Lo que no es tan frecuente encontrar es empresas que hagan uso del conocimiento que se puede generar de esos datos a partir de uso de herramientas de minería de datos. Las reglas de asociación se basan en métodos y técnicas de la minería de datos que permiten estimar o predecir comportamientos sobre datos recolectados como resultado del quehacer operativo de la empresa, con las que se espera conocer, a partir de la aplicación de modelos formales, el comportamiento de compra de los clientes de un supermercado de mediana superficie y proponer, a partir de este conocimiento, estrategias y acciones a seguir para de un lado fortalecer los hallazgos favorables encontrados, y de otro, mejorar las posibles falencias identificadas.