bluuebunny/crossref_metadata_2025_split huggingface dataset:
Intradural extramedullary cavernous hemangioma of the cervicothoracic junction: A case report and review of the literature
Authors: Colamaria Antonio , Sacco Matteo , Iodice Savino , D’Oria Salvatore , Parbonetti Giovanni , Carbone Francesco , de Notaris Matteo 
Published: February 2022

Background:
Intradural extramedullary cavernous hemangiomas of the spine are rare, benign lesions with only 40 published cases to date.

Case Description:
The authors report a rare case of a histologically diagnosed intradural extramedullary cavernous hemangioma of the spine involving the cervicothoracic junction and causing sudden gait disturbances and urinary retention in a 24-year-old male. Gross total tumor removal allowed complete spinal decompression and sensible improvement of the clinical condition with no evidence of tumor relapse at 12-month follow-up examination.

Conclusion:
More frequently found in the lower thoracic and lumbar spine, these tumors often cause subtle clinical manifestations including sensory and motor dysfunction secondary to nerve root compression; nonetheless, occasional cases of rapidly progressive worsening of the neurological condition with evidence of myelopathy and autonomic dysfunction have been described. In such cases, urgent surgical resection is crucial since the degree of neurological impairment and the time spanned from the onset of the symptoms are paramount for a good recovery.
Pengaruh Perbedaan Arus Pengelasan pada Sambungan Pipa Baja API SL Gr B
Authors: Adi Ganda Putra  , Pawawoi  
Published: February 2022

Baja karbon merupakan salah satu jenis bahan yang berasal dari jenis logam ferro dimana memiliki pembagian yang salah satunya adalah baja karbon rendah. Baja AP! 5 L grade B salah satu contoh dari sekian banyak jenis baja karbon rendah. Baja ini biasa digunakan sebagai pipa penyalur (pipe line) maupun proses pemipaan (piping process). Dan pengelasan merupakan proses penyambungan yang dilakukan pada konstruksi pipa tersebut, dimana banyak proses pengelasan yang dapat dipilih guna mendapatkan hasil yang terbaik. Akan tetapi, pada kenyataannya sebaik apapun desain yang dirancang, cacat selalu mengikuti setiap prosesnya. Untuk itu kesalahan jangan sampai terulang kedua kali dimana cacat yang terjadi tidak dapat terdeteksi oleh sebab pengujian yang dilakukan harus sesuai dengan standar yang ada, pada pengujian kali ini standar yang digunakan adalah API 1104 yang sesuai dengan proses pemipaan untuk migas.
Perbedaan arus pengelasan yang digunakan pada sambungan pipa baja dapat mengurangi cacat pada sambungan pipa baja sehingga kegagalan pada sambungan tersebut dapat dihilangkan.
Analisis Struktur Mikro dan Sifat Mekanik Baja Mangan Austenitik Hasil Proses Perlakuan Panas
Authors: Abrianto Akuan  
Published: February 2022

Nilai kekerasan tertinggi yaitu 334.2HV untuk material baja mangan austenitik dihasilkan dari hasil proses perlakuan panas annealing. Semakin lambat laju pendinginan proses perlakuan panas (quenching, normalizing, annealing) material baja mangan austenitik akan meningkatkan nilai kekerasan material tersebut, yaitu (217.4 HV, 245.0 HV, 334.2 HV). Struktur mikro material baja mangan austenitik hasil perlakuan panas guenching adalah karbida dalam matrik austenit (Î³), sedangkan hasil perlakuan panas normalizing dan annealing adalah karbida dalam matrik ferrit (É‘).
Pengaruh Variasi Proses Peregangan terhadap Sifat Mekanik dan Struktur Mikro Baja St. 37 pada Proses Roll Bending
Authors: Adi Ganda Putra  
Published: February 2022

Proses pembentukan merupakan perubahan bentuk benda kerja yang dilakukan dengan jalan memberikan gaya supaya terjadi deformasi plastis. Besarnya gaya luar untuk pembentukan yang dapat mengubah benda kerja harus diberikan secara permanen. Proses rol tekuk (roll bending) merupakan salah satu proses pembentukan pelat dimana pelat material jenis St. 37 merupakan bahan yang sering digunakan karena memiliki kemampuan bentuk yang baik. Dalam proses rol tekuk (roll bending) dengan memberikan variasi regangan 5%, 10%, dan 15%, pada suatu-material akan mengalami perubahan sifat mekanik dan struktur mikronya.
Semakin tinggi regangan yang diberikan pada proses roll bending terhadap pelat baja karbon rendah (Baja St. 37) akan menyebabkan peningkatan kekerasan, kekuatan, keuletan (elongasi dan reduksi penampang) dan perubahan bentuk butir dari eguaxial menjadi semakin pipih dalam struktur mikro yang berfasa perlit didalam matrik ferrit.
Pengembangan Algoritma Penjadwalan Preventive Maintenance dengan Menggunakan Metoda Nippon-Denso dan Analytic Hierarchy Process di PT. Pupuk Kujang I B
Authors: Cucu Wahyudin  
Published: February 2022

Sejak tahun 2006 kebutuhan pupuk di Indonesia khususnya di daerah Jawa Barat sebesar 700.500 ton harus dipenuhi oleh PT. Pupuk Kujang Cikampek (Persero), sementara kapasitas produksi hanya sebesar 1.725 ton/hari atau 570.000 ton/tahun. Untuk mencukupi dan memenuhi kebutuhan pasokan pupuk tersebut, kemudian PT. Pupuk Kujang Cikampek (Persero) mendirikan Kujang IB.
Saat ini, Kujang 1B (Dinas Perencanaan dan Pemeliharaan) dalam menjalankan sistem perawatan mesin sudah cukup baik, yaitu dengan melakukan jadwal Preventive Maintenance secara rutin untuk setiap mesinnya selama 4 bulan sekali. Orang-orang yang merawat mesin sudah memiliki pengetahuan yang memadai tentang mesin tersebut dan memiliki pengalaman yang tinggi (jam terbangnya banyak). Walaupundemikian, masih terdapat jumlah down time yang tinggi, yaitu untuk pabrik utility dengan penggerak item turbin 494 jam, motor 941 jam dan pompa 1059 jam. Pabrik Cosorb dengan item penggerak pompa 1710 jam dan compressor 1003 jam. Pabrik Ammonia dengan item penggerak turbin 644 jam, motor 1465 jam, compressor 358 jam dan pompa 442 jam. Pabrik Urea dengan item penggerak motor 3415 jam dan pompa 431 jam.
Jumlah down time tersebut menunjukkan indikasi bahwa performansi dari kegiatan perawatan yang sudah berjalan saat ini kurang memuaskan. Metoda Nippon Denso diduga dapat dijadikan acuan untuk meningkatkan nilai performansi sistem perawatan.
Pengaruh Kondisi Air Terhadap Laju Korosi pada Baja Tulangan
Authors: Bambang Hari Prabowo  , Lela Mukmilah  
Published: February 2022

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Penggunaan logam sebagai bahan konstruksi, perlu diketahui seberapa cepatkah suatu logam itu rusak atau tidak berfungsi karena korosi. Maka dari itu dibutuhkan pengendalian korosi agar bahan kontruksi dapat berfungsi maksimal.
Banyak faktor yang menyebabkan kegagalan suatu struktur beton diantaranya kekuatan ikatan atau kuat lekat (bonding strength) antara beton dan tulangannya sendiri. Penurunan kekuatan ikatan beton dengan tulangannya dapat terjadi bila pada permukaan baja tulangan yang digunakan sebelum atau setelah dilakukan pengecoran terdapat kotoran berupa deposit korosi, tanah, minyak pelumas dan lain-lain.
Pada penelitian ini, dilakukan perendaman selama beberapa waktu pada baja tulangan di berbagai kondisi air digunakan sebagai cara untuk mengukur laju korosi pada baja tulangan konstruksi beton, karena air adalah salah satu komposisi utama untuk tercampurnya beton, yang akan memicu proses kimiawi semen, membasahi agregat dan memberikan kemudahan dalam pengerjaan beton. Sehingga dari usaha ini, diharapkan, dapat diketahui kondisi air yang dipakai untuk pembuatan beton bertulang, dengan mempertimbangkan dampak yang akan dialami oleh baja tulangan di dalam beton tersebut.
Implementasi Algoritma Koreksi Diffrential GPS Dengan Metode Diferensial Tunggal Secara Post-Processing
Authors: Pujo Laksono  
Published: February 2022

Dengan adanya perbedaan klasifikasi pada alat, serta kesalahan-kesalahan alami serta teknis pada sistem GPS, maka dibutuhkan sebuah metode untuk meningkatkan akurasi untuk aplikasi-aplikasi yang membutuhkan akurasi tinggi. Dalam hal ini, metode koreksi DGPS dengan diferensial tunggal menawarkan solusi yang dapat memberikan hasil yang memuaskan. Penelitian ini berisi studi menyangkut implementasi serta kelayakan metode koreksi DGPS di lapangan untuk aplikasi statis dengan pengolahan data post-processing.
Penelitian ini dilakukan dengan cara melakukan studi referensi, kemudian eksplorasi terhadap alat yang digunakan, dalam hal ini pesawat GPS kelas-A dan pesawat GPS kelas-B. Setelah pemahaman terhadap alat tercapai, dilakukan implementasi dan pengujian terhadap metode koreksi DGPS ini sehingga akan dapat dianalisis mengenai tingkat akurasi serta kelayakan dari penerapan metode koreksi DGPS dengan diferensial tunggal.
Album "Królestwo Polskie" w serii Malownicza Rosja. Zjawisko eklektyzmu w rosyjskiej sztuce książki w XIX wieku
Authors: Mostowicz-Kapciak Ewa 
Published: February 2022

W artykule przeprowadzono analizę formalną albumu Królestwo Polskie, wydanego w serii Malownicza Rosja przez Towarzystwo Maurycego Wolffa. Kompleksowej analizie poddano motywy zdobnicze, kształt czcionek, stylistykę grafiki, dekoracji dzieła i fotografii. Wskazano źródła rycin i zdjęć. Uzasadniono, że na kształt strony edytorskiej dzieła miały wpływ zmiany w sztuce i w przemyśle XIX wieku, które sprawiły, że stało się ono pod względem formalnym dziełem różnorodnym, łączącym elementy minionych epok z oznakami postępu technologicznego.
Antioxidant and Antiproliferative Potential of Acacia auriculiformis Methanol Leaves Extract Against Breast Cancer Cell Model
Authors: Sundari Triska Desi , Wijayanti Nastiti 
Published: February 2022

Acacia auriculiformis is a plant which often found in Indonesia. Acacia leaves have been known to have high antioxidant content. The phenolic compound of A. auriculiformis is the largest of these plants and phenolic compound have potential as anticancer protective agents. The aims of this study were to determine the phenolic compound, antioxidant activity, cytotoxic and antiproliferative activity of acacia leaves extract against T47D and MCF-7 breast cancer cell lines. Extraction was carried out by maceration method using methanol as a solvent. Phenolic compounds were examined by Thin Layer Chromatography (TLC) and antioxidant activity was measured using DPPH assay, followed by cytotoxicity and antiproliferation test measured by MTT Assay to obtain the IC50 value and percent of antiproliferation. Based on TLC, A. auriculiformis methanol leaves extract contain a phenolic compound with Rf value of 0.85 compared to gallic acid. ÃÂ Antioxidant activity A. auriculiformis with IC50 value of 9 ppm is classified as high antioxidant activity and MTT assay results for cytotoxicity with IC50 value of 273.8 and 31.26 ppm for T47D and MCF-7 cells, respectively. Antiproliferative analysis also showed high values for MCF-7 cells. These data have shown that methanol leaves extract of A. auriculiformis has high antioxidant activity and inhibited MCF-7 cell proliferation but not T47D breast cancer cell lines.ÃÂ
The Effect of Young Papaya Seed Extract on the Number of Male Mice Spermatozoes (Mus musculus)
Authors: Louise Calame Tannya Efritzka , Kusmiyati Kusmiyati , Merta I Wayan 
Published: February 2022

Papaya fruit has many benefits, one of which is papaya seed can be used as antifertility drugs especially young papaya seeds. This is because young papaya seeds contain secondary metabolites of alkaloid glycosides and proteolytic enzymes such as papain which can interfere with spermatogenesis. This aims to determine the effect of young papaya seed extract of a mice number spermatozoa. Mice were randomly selected to represent 4 dose groups: control group (P0), extract 30mg/BW (PI), extract 60mg/BW (PII) and extract 90mg/BW (PIII). Each treatment group was carried out with six repetitions. The treatment was given intravenously by injecting it in the tail of the mice for 15 consecutive days. The observed spermatozoa quality variables is a number of spermatozoa. Data analysis used one way ANOVA significance test 5% (p<0,05) and continuedÃÂ with the LSD (Least Significant Difference) 95% confidence. The result of the study on the quality of spermatozoa showed a significant effect at the doses of 60mg/BW (PII) and 90mg/BW (PIII). The higher dose of young papaya seed extract, it increasingly affects the number of sperm. The research concluded that the extract of young papaya seeds has a significant impact of a mice number spermatozoa (Mus musculus).
The Biological Parameters as an Indicators of Water Quality for a Tourism Area Spot in Jurang Sate Primary Canal Central of Lombok, Indonesia
Authors: Dzurrahmi Baiq Dini Najia , Idrus Agil Al , Japa Lalu 
Published: February 2022

Jurang Sate primary canal is one of the the main irrigation canal in central Lombok whichÃÂ supplies water from the main network, namely Jangkok, Sesaot, and Keru Feeder weir to several secondary canal and to irrigated tertiary plots. The local community use the Jurang Sate Primary canal in a variety of daily activities, and nowadays it is used as a means of water tourism. The purpose of this study was to determine the water quality for ectourism area spot of the Jurang Sate primary canal based on biological parameters, namely the total Coliform bacteria, and the diversity of phytoplankton species. Measurement of coliform bacteria parameters and phytoplankton diversity was carried out ex-situ. The results showed that the total Coliform bacteria count in each sample calculated with MPN index was in the range of 170-110000 MPN/100 ml. The phytoplankton identified in this study were 24 species, 15 orders, and 6 classes. Phytoplankton species diversity index value of 1.32 (medium category). The water of the primary channel of Jurang Sate was categorized in moderately polluted. The conclusion of this research is the water of the Jurang Sate primary canal is not ideal for water tourism activity.
Growth Performance Sargassum sp. Cultivated in Labuan Ijuk, Moyo Hilir Sumbawa Besar Regency, Nusa Tenggara Barat
Authors: Cokrowati Nunik , Setyowati Dewi Nur'aeni , Lumbessy Salnida Yuniarti , Erwansyah Erwansyah 
Published: February 2022

Sargassum sp. is an alginate-producing brown alga that is used in the food, drug, and cosmetic industries. Sargassum sp. can be found in the waters of West Nusa Tenggara, namely on the islands of Lombok and Sumbawa. Sargassum sp. has not been cultivated in the waters of West Nusa Tenggaracurrently, Sargassum sp. is only exploited from nature. So it is necessary to cultivate efforts in the waters of West Nusa Tenggara. The waters of Labuan Ijuk, Sumbawa Besar Regency, have the potential as a location for the development of Sargassum sp. This study aimed to study the growth performance of Sargassum sp. with different initial seedling weights by using the bottom-off method. The research method used is the experimental method with the experimental design is a completely randomized design. The treatment in this study consisted of five treatments with four replications. Treatment A with 50 gr seed weight, B 75 gr seed weight, C 100 gr seedling weight, D 125 gr seedling weight, and E 150 gr seedling weight. Data analysis using ANOVA and 5% BNJ follow-up test. The results showed that the highest absolute weight was obtained in treatment E, which was 39.75 g, as well as the highest specific weight was obtained in treatment E, which was 36.81%. The lowest absolute weight was obtained in treatment C, 24.25 g, with the lowest specific weight also being 26.47%. This research concludes the optimum growth of Sargassum sp. obtained in cultivation using an initial seed weight of 150 gs.ÃÂ ÃÂ ÃÂ ÃÂ ÃÂ
Diversity Insects of Spring in Mutis Timau Nature Reserve, TTS District, NTT Province
Authors: Semiun Chatarina Gradict , Boli Duhan Gaudensius U. U. 
Published: February 2022

Insect diversity is believed to be used as a bio-indicator of spring quality, this study aimed at determining the spring insect diversity around the Mutis Timau Nature Reserve. The study was conducted from June to August 2019. Insects were caught by using the yellow pan trap and hand sorting. The diversity of spring insects was determined based on the Shannon-Wiener diversity index (H'), species richness index (R1), species dominance index (D), and evenness index (E). The results showed that 16 species belong to 11 families, and five orders of insects. The families included Gryllidae, Gryllotalpidae, Tetrigidae, Formicidae, Pompilidae, Apidae, Ochteridae, Veliidae, Hydrometridae, Nepidae, Coenagrionidae, Libellulidae, Carabidae, and Coccinellidae. The Shannon-Wiener species diversity index and the wealth index of the species of springs were classified as moderate (H '= 2.12 and R1 = 4.19). There was no type of spring insects dominated (D = 0.23). All springs insects were found to have almost the same level of evenness (E<1), with a value of 0.76. Abiotic factors such as pH and soil temperature were within the tolerance range of spring insects.ÃÂ ÃÂ
Identification of Parasitic Worm Eggs in Cow Feces from Sepang Bay, Lembar District, West Lombok Regency, West Nusa Tenggara
Authors: Jupri Ahmad , Jannah Nina Nurraudatul 
Published: February 2022

Cows are one of the ruminant animals and farm animals that have a higher economic value compared to other livestock such as chickens, goats, buffalo and others, so many people build cattle farming businesses. In this case, the health of farm animals is one of the main factors that determine the successful production of cows. The study aims to detect the type of eggs from parasitic worms in cow feces and the degree of infection based on Total Standard (Egg Per Gram). Fecal sampling is done randomly from traditional breeder cows in Teluk Sepang Lembar Subdistrict. The sample number of 10 community cattle farms. Identification of the type of worm was carried out at UPTD Animal Hospital and Veterinary Laboratory of Animal Husbandry and Animal Health Office of West Nusa Tenggara Province. Furthermore, quantitative examination uses the buoyant method (Flotation method) and qualitatively with the Mc. Master method that calculates the number of eggs per gram (EPG) of feces. The results showed 6 negative samples and 4 positive samples infected with parasitic worms,and ÃÂ 2 types of worm eggs of the nematode class namely Trichostrongylus sp. and Chabertia ovina , and 1 species of cestoda class namely Moniezia sp. Based on the standard total EPG (Egg Per Gram) feces it is known that the degree of infection of the type of worm eggs Trichostrongylus sp., Chabertia ovina and Moniezia sp. It is low level.ÃÂ
Stomatal Characteristics of 5 Citrus L. Species (Rutaceae) From Pekanbaru, Riau Province
Authors: Sofiyanti Nery , Wahyuni Putri Intan , Iriani Dyah 
Published: February 2022

Stomata of leaf is one of the important trait in plant taxonomic study. This trait can be used to characterisize the members of a plant group including Citrus.This genus is one of fruit plant that commonly known in Pekanbaru, Riau. The aim of this study was to examine the characteristic of stomata of 5 Citrus species from Pekanbaru, Riau Province, Indonesia. Leaves were collected from the field. The stomatal preparations were conducted using replica method. Stomata were then observed and photographed using Mikroskop Binokuler Olympus CX23 and Mikroskop LCD Digital Celestron Model 44340. The results show that stomata of all Citrus species examined in this study shows the similar type, hypostomatic with reniform-shaped stomata. However, the variations are found in stomata density and index, as well as the length and length of stomata. C. hystrix and C. aurantifolia have the lowest (419.89/1 mmÃÂ²).), and the highest stomatal density (685.89/1 mmÃÂ²).), respectively. The size of stomata varies within the species. C. microcarpa has the biggest stomata size (20.5 x 18.5 ÃÂµm). ÃÂ Stomatal density of Citrus examined in this study are high (> 500 / mm2) in C. aurantifolia and C. limon) and medium (300 - 500 / mm2) in C. amblicarpa, C. hystrix and C. microcarpa. The density, index and size of stomata can be used to characterize each Citrus members that examined in this study.
Analysis of Cd and Cu Heavy Metal Content in Climbing perch (Anabas testudineus) Derived from Rawa Taliwang Lake, West Sumbawa Regency
Authors: Khairuddin Khairuddin , Yamin M. , Kusmiyati Kusmiyati 
Published: February 2022

Many species of fish in Rawa Taliwang Lake can be used as bioindicators. Climbing perch (Anabas testudineus) is a species of freshwater fish that is used as a bioindicator. The aims of this study were: Want to know the heavy metal content of Copper (Cu) and Cadmium (Cd) in Climbing perch from Rawa Taliwang Lake to enrich the Environmental Knowledge course material. A special benefit is to protect consumers who consume fish from heavy metal contaminants. The research was conducted in Rawa Taliwang Lake, which is an area that is submerged in water. Methods Data collection was carried out by determining 2 research stations, namely in the east and west of the lake. Next, fishing is done using gill nets. Fish samples were taken from 3 to 4 fish at each station. The fish species taken were Climbing perch (Anabas testudineus). Then each fish sample was put into a plastic bag and then stored in a sample box. The research sample was then analyzed in the West Nusa Tenggara Health, Testing and Calibration laboratory. The data analysis method was carried out by taking muscle tissue from Climbing perch and then analyzing the content of heavy metals in the form of Copper (Cu), and Cadmium (Cd) using an Atomic Absorption Spectrophotometer. Measurement of heavy metals in fish tissue was carried out by adding concentrated HNO3 and HClO4, heated at a temperature of 60-70ÃÂºC for 2-3 hours until the solution was clear. Ready samples were measured by AAS using an air-acetylene flame. The measurement results show the presence of heavy metals Copper (Cu) and Cadmium (Cd) in the fish tissue studied. The conclusion of this study is that the heavy metal content in Climbing perch ÃÂ (Anabas testudineus) originating from Rawa Taliwang Lake to enrich the Environmental knowledge course material is; Copper (Cu) ranged from 0.067 ppm to 0.126 ppm, and Cadmium (Cd) ranged from 0.011 ppm to 0.016 ppm.
PENGARUH PEMBERIAN JENIS PUPUK YANG BERBEDA TERHADAP PERTUMBUHAN DAN KELANGSUNGAN HIDUP RUMPUT LAUT KULTUR JARINGAN (Eucheuma cottoni)
Authors: Jaelani Muhamad Mahsun , Marzuki Muhammad , Azhar Fariq 
Published: February 2022

Rumput laut merupakan salah satu komoditas perikanan yang potensial untuk dibudidayakan. Salah satu rumput laut yang memiliki nilai ekonomis tinggi adalah Eucheuma cottoniiyang merupakanhasil kultur jaringanspesies alga merah penghasil karagenan dan memiliki banyak peranan penting bagi manusia..Penelitian ini bertujuan untuk mengetahui pengaruh penambahan pupuk Cair, NPK, Urea dan TSP dengan doses 100 gram terhadap laju pertumbuhan rumput lautEucheuma cottonii. Penelitian ini dilaksanakan pada bulan Maret- April 2019 dibalai laut Lombok Sekotong Kabupaten Lombok Barat.Metode yang di gunakan adalah RAL (Rancangan Acak Lengkap) dengan 4 perlakuan dan 3 kali ulangan. Media pemeliharaan menggunakan air laut yang ditambahkan pupuk dengan dosis 100 gram, yaitu : P1 (Pupuk Cair), P2 (Pupuk NPK), P3 (Pupuk Urea) P4 (Pupuk TSP). Data yang diamati berupa Berat mutlak, Panjang mutlak, Pertumbuhan harian, Berat relatif, Panjang relatif dan kualitas air yang digunakan sebagai media pemeliharaan. Analisis data menggunakan ANOVA.Hasil penelitian menunjukkan bahwa penambahan Pupuk Cair, NPK, Urea dan TSP dengan doses 100 gram memberikan pengaruh berbeda sangat nyata terhadap pertumbuhan dan kelangsungan Hidup Rumput laut Eucheuma cottonii. Laju pertumbuhan tertinggi pada Pupuk Urea sedangkan pertumbuhan terendah pada Pupuk TSP.