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"Senyawa turunan 4H-thiopyran pada umumnya dapat disintesis dari senyawa turunan chalcone, yang mana senyawa tersebut diketahui memiliki bioaktivitas yang cukup luas salah satunya adalah antioksidan. Pada penelitian ini, dilakukan sintesis senyawa turunan 4H-thiopyran menggunakan prekursor tiazolidindion dan oksazolidindion, aldehid aromatik yaitu tereptaldehid, senyawa keton yaitu asetofenon dan asetil piridin, serta maleat anhidrida. Dalam sintesis senyawa turunan 4H-thiopyran, terlebih dahulu dilakukan dengan mereaksikan tiazolidindion dan oksazolidindion masing-masing dengan tereptaldehid, setelah itu barulah dilakukan reaksi dengan variasi keton yaitu asetofenon dan asetil piridin hingga terbentuk senyawa chalcone. Kemudian melakukan reaksi tionasi pada senyawa chalcone menggunakan reagen Lawesson (C14H14O2P2S4), setelah itu dilakukan reaksi sikloadisi senyawa thiochalcone dengan maleat anhidrida melalui reaksi Diels-Alder. Senyawa yang diperoleh dari penelitian ini adalah senyawa turunan 4H-thiopyran berbasis 2,4-tiazolidindion dan asetofenon dengan yield sebesar 64,29%, lalu senyawa turunan 4H-thiopyran berbasis 2,4-tiazolidindion dan asetil piridin dengan yield sebesar 62,60%, kemudian senyawa turunan 4H-thiopyran berbasis 2,4-oksazolidindion dan asetofenon dengan yield sebesar 69,67%, dan senyawa turunan 4H-thiopyran berbasis 2,4-oksazolidindion dan asetil piridin dengan yield sebesar 67,90%. Senyawa hasil sintesis tersebut selanjutnya dilakukan uji aktivitas antioksidan menggunakan metode DPPH dan diperoleh bahwa senyawa tersebut tergolong senyawa antioksidan yang cukup baik karena memiliki nilai IC50 yang tergolong sedang yaitu di sekitar 100 ppm

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In general, 4H-thiopyran derivatives can be synthesized from chalcone derivatives, which are known to have a wide range of bioactivities, one of which is antioxidant. In this research, the synthesis of 4H-thiopyran derivatives was carried out using thiazolidindione and oxazolidindione precursors, aromatic aldehydes, namely tereptaldehyde, ketone compounds, namely acetophenone and acetyl pyridine, and maleic anhydride. In the synthesis of 4H-thiopyran derivatives, it is first carried out by reacting each thiazolidindion and oxazolidindione with tereptaldehyde, after that the reaction is carried out with variations of ketones, namely acetophenone and acetyl pyridine to form a chalcone compound. Then carry out the thionation reaction on the chalcone compound using Lawesson's reagent (C14H14O2P2S4), after which the cycloaddition reaction of the thiochalcone compound with maleic anhydride is carried out via the Diels-Alder reaction. The compounds obtained from this study were 4H-thiopyran derivatives based on 2,4-thiazolidindion and acetophenone with a yield of 64.29%, then 4H-thiopyran derivatives based on 2,4-thiazolidindion and acetyl pyridine with a yield of 62.60%, then a 4H-thiopyran derivative based on 2,4-oxazolidindion and acetophenone with a yield of 69.67%, and a 4H-thiopyran derivative based on 2,4-oxazolidindion and acetyl pyridine with a yield of 67.90%. The synthesized compound was then tested for antioxidant activity using the DPPH method and it was found that the compound is classified as a fairly good antioxidant compound because it has an IC50 value which is classified as moderate, around 100 ppm."

"[ABSTRAKLatar Belakang: Hipoglikemia merupakan masalah metabolik yang sering terjadi pada neonatus terutama bayi kurang bulan dan bayi kecil masa kehamilan. Sebagaian besar neonatus kompensasi hipoglikemia fisiologis dengan memproduksi benda keton.Tujuan: Membantu menambahkan data dalam membuat pedoman pemeriksaan glukosa darah pada bayi late preterm dan bayi cukup bulan kecil masa kehamilan.Metode Penelitian: Penelitian cross sectional untuk melihat gambaran kadar gula darah diawal kelahiran pada bayi late preterm dan cukup bulan kecil masa kehamilan dan hubungannya dengan keton darah sebagai respons adaptasi metabolik. Penilaian respons kadar keton darah terhadap perubahan kadar gula darah dengan melakukan uji korelasi pada masing-masing tahap penilaian.Hasil: Sebanyak 53 subyek memenuhi kriteria penelitian. Rerata kadar gula darah pada usia 0-4 jam 69,83±22,19 mg/dL, >4-24 jam 63,02±16,80 mg/dL, >24-48 jam 62,94±14,80 mg/dL ) keseluruhan secara statistik tidak berbeda bermakna (p= 0,117). Median kadar keton darah pada usia 0-4 jam 0,60 (0,10-1,40) mmol/L, >4-24 jam 0,60 (0,30-1,3) mmol/L, >24-48 jam 0,60 (0,10-1,40) mmol/L keseluruhan secara statistik tidak berbeda bermakna (p = 0,326). Hubungan antara perubahan kadar gula darah dengan perubahan kadar keton darah menunjukkan bahwa setiap perubahan satu unit kadar gula darah mengakibatkan perubahan kadar keton darah sebesar 0,0012 secara statistik tidak bermakna (p = 0,192).Simpulan: Pola perubahan glukosa darah bayi late preterm dan bayi cukup bulan kecil masa kehamilan tidak selalu mengalami hipoglikemia, produksi badan keton pada bayi late preterm dan bayi cukup bulan kecil masa kehamilan memadai.

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ABSTRACTIntroduction: Hypoglycaemia is the most common manifestation of failure of metabolic adaptation in the newborn period, especially in premature infants and small for gestational age. Most of the physiological neonatal hypoglycaemia compensate physiologist hypoglycaemia by producing ketone body.Objective: Provide data to establish guidelines blood glucose tests in late preterm infants and term infants small for gestational age.Methods: A cross sectional research to see pattern of blood glucose concentration at the newborn and its relationship with blood ketones as a response to metabolic adaptation. Evaluation of blood ketone concentration to the change of blood glucose is done by correlation test at each evaluation stage.Results: A total of 53 subjects fulfil the study criteria. The mean blood glucose level at the age of 0-4 hours was 69,83 ± 22,19 mg/dL, > 4-24 hours was 63,02 ± 16,80 mg/dL, > 24-48 hours was 62,94 ± 14,80 mg/dL overall was not statistically significant (p = 0.117). Median levels of blood ketones at the age of 0-4 hours was 0.60 (0.10 to 1.40) mmol/L, > 4-24 hours was 0.60 (0.30 to 1.30) mmol/L , > 24-48 hours was 0.60 (0.10 to 1.40) mmol/L overall was not statistically significant (p = 0.833). The relationship between changes in blood glucose levels by changing levels of blood ketones indicate that any change in one unit of blood glucose levels lead to changes in levels of blood ketones at 0.0012 was not statistically significant (p = 0.192) .Conclusion: The change of blood glucose in late preterm infants and term infants small for gestational age not always having hypoglycemia. Production of ketone body at late preterm infants and term infants small for gestational age is not sufficient., Introduction: Hypoglycaemia is the most common manifestation of failure of metabolic adaptation in the newborn period, especially in premature infants and small for gestational age. Most of the physiological neonatal hypoglycaemia compensate physiologist hypoglycaemia by producing ketone body.Objective: Provide data to establish guidelines blood glucose tests in late preterm infants and term infants small for gestational age.Methods: A cross sectional research to see pattern of blood glucose concentration at the newborn and its relationship with blood ketones as a response to metabolic adaptation. Evaluation of blood ketone concentration to the change of blood glucose is done by correlation test at each evaluation stage.Results: A total of 53 subjects fulfil the study criteria. The mean blood glucose level at the age of 0-4 hours was 69,83 ± 22,19 mg/dL, > 4-24 hours was 63,02 ± 16,80 mg/dL, > 24-48 hours was 62,94 ± 14,80 mg/dL overall was not statistically significant (p = 0.117). Median levels of blood ketones at the age of 0-4 hours was 0.60 (0.10 to 1.40) mmol/L, > 4-24 hours was 0.60 (0.30 to 1.30) mmol/L , > 24-48 hours was 0.60 (0.10 to 1.40) mmol/L overall was not statistically significant (p = 0.833). The relationship between changes in blood glucose levels by changing levels of blood ketones indicate that any change in one unit of blood glucose levels lead to changes in levels of blood ketones at 0.0012 was not statistically significant (p = 0.192) .Conclusion: The change of blood glucose in late preterm infants and term infants small for gestational age not always having hypoglycemia. Production of ketone body at late preterm infants and term infants small for gestational age is not sufficient.]"

"Latar Belakang. Lebih dari 750 bahan kimia dan beberapa kelompok senyawa kimia termasuk pelarut organik diduga bersifat neurotoksik. Namun pada umumnya bahan kimia tersebut belum pernah dilakukan tes untuk menilai efek neurotoksik yang ditimbulkan. Pelarut organik seperti MEK digunakan secara luas pada industri alas kaki yang pada umumnya bersifat padat karya, sehingga jumlah pekerja yang terpajan juga sangat besar. Pelarut organik dapat mengakibatkan ensefaloti toksik kronik pada pekerja yang terpajan berlebihan. Oleh karena keluhan subyektif mungkin mengindikasikan suatu ensefalopati maka deteksi dini sangatlah penting. Kuesioner Swedish Q16 adalah kuesioner deteksi dini yang paling sering digunakan untuk skrining pekerja yang terpajan pelarut organik. Penelitian ini bertujuan untuk mengetahui prevalensi gejala dini neurotoksik akibat terpajan pelarut organik metil etil keton, serta pengaruh faktor umur, jenis kelamin, pendidikan , masa kerja, status gizi, pemakaian APD, kebiasaan minum alkohol, minum kopi, merokok, kadar pajanan tempat kerja, serta hasil pemantauan biologis terhadap timbutnya gejala dini neurotoksik.Metode. Penelitian ini menggunakan disain penelitian cross-sectional dengan jumlah subyek penelitian 123 orang pekerja pada sebuah kelompok perusahaan sepatu. Pengukuran pajanan dilakukan dengan personal sampling dan pemantauan biologis. Pengumpulan data dilakukan pada bulan Desember 2003 sampai Januari 2004. Hasilnya diolah menggunakan program statistik SPSS 11,5.Hasil dan Kesimpulan. Prevalensi gejala dini neurotoksik pada pekerja yang terpapar pelarut organik metil etil keton sebesar 52%, jika prevalensi didasarkan alas kadar pajanan MEK lingkungan kerja, maka pekerja yang terpajan tinggi prevalensinya sebesar 72,1%, sedangkan yang terpajan rendah 41,3%. Secara statistik yang menunjukkan hubungan bermakna dengan timbulnya gejala dini neurotoksik adalah kadar MEK lingkungan kerja (OR 3,68; p 0,001; 95% CI 1,65 - 8,20), basil pemantauan biologik pads urine (OR 4,17; p 0,000; 95% CI 1,87 - 9,29) dan faktor umur (OR 4,07; p 0,001; 95% CI 1,78 - 9,30).

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The Correlation Between Metil Etil Keton Exposure And Early Symptoms Of Neurotoxicity Among Footwear Factory Workers (Based On Swedish Q16 Questionnaire)Back Ground. More than 750 chemicals and several classes of chemical compound including organic solvent are suspected to be neurotoxic, but majority of chemicals are never been tested for neurotoxic properties. Organic solvent such as MEK are widely use in footwear industry. Footwear manufacturing is a labour intensive industry, as a result large group of workers are exposed. Organic solvent can cause a chronic toxic encephalopathy in overexposed workers. Because subjective complaint may indicate an encephalopathy, early recognition is important. Swedish Q16 questionnaire is the most commonly used for screening workers who are exposed to organic solvent . The aim of the study was to examine the effect of exposure to MEK on the prevalence of complaints. Further objective were to analyse the influences of sex, education, alcohol consumption, smoking habits, caffeinated beverage, nutriotional status, PPE, length of service, MEK concentration, and Bio-monitoring result.

Method. In a cross sectional study, 123 workers with occupational exposure to MEK were interviewed by means of Swedish Q16 questionnaire. Exposure estimation was made by personal sampling and biological monitoring. Data collecting was conducted from December 2003 to January 2004. The statistical analysis was performed with SPSS 11,5 statistical software.

Result and conclusions. Prevalence of workers with early symptoms of neurotoxicity was 52%. Age (OR 4,07; p 0,001; 95% CI 1,78 - 9,30), Exposure level of MEK (OR 3,68; p 0,001; 95% CI 1,65 - 8,20), and result of biomonitoring (OR 4,17; p 0,000; 95% CI 1,87 - 9,29) showed statistical significant influence on the early symptoms of neurotoxicity."

"Orangutans are arboreal, semi solitary, and frugivor primates. Theyspend the majority of their time consuming fruits. The percentage of fruitconsumption reaches 60–70 % of the total feeding time. The fluctuating fruitavailability in the nature significantly impacts the orangutan’s nutritionalintake. When fruits are available in low amounts, orangutans will use their fatstorage to produce energy. The final result of the fat metabolism is ketonebodies, which can be detected in the orangutan’s urine.Tuanan is a secondary forest that would be an interesting valuable sitefor comparative studies, to ensure whether a certain type of habitat impactsthe orangutan’s behavior and its necessity for food. The objectives of thisresearch were (1) to observe the orangutan’s daily activity, food proportion,as well as the presence of ketone bodies in the orangutan’s urine, and (2) toensure whether fruit availability affects those values.Data were collected from the following 12 orangutans (5 nonreproductivefemales, 1 reproductive female, 3 flanged males and 3unflanged males) using instantaneous focal animal sampling method. The proportion of time spent in feeding, resting, moving, nesting, and socialactivity were 61,20%, 27,08%, 10,30%, 1,24% and 0,18%, respectively.Significant difference was obtained only in moving activity. Social activity hassignificant correlation with fruit availability.From this research, food proportion consisted of fruits (50,94%),leaves (27,24%), vegetative (9,87%), flowers (5,42%), cambium (3,65%),insects (2,80%), and others (0,08%). There was different proportion in flowerintake based on gender and social class. Proportion of fruit consumption inorangutans was significantly correlated with fruit availability.From 116 orangutans' urine samples, ketone bodies were only found innon-reproductive females. The female had just given birth to her firstoffspring. There was no significant correlation between the presence ofketone bodies in orangutans with fruit availability."

"Ester asam oleat-sorbitol dapat disintesis secara enzimatis dengan katalis lipase yang terimobilisasi pada nanopartikel Fe3O4-Polidopamin. Pada penelitian ini, nanopartikel Fe3O4 dapat disintesis dengan menggunakan metode kopresipitasi, kemudian dimodifikasi dengan polidopamin. Karakterisasi pada nanopartikel Fe3O4, Fe3O4-Polidopamin, dan Fe3O4-Polidopamin-Lipase dilakukan dengan menggunakan FESEM-EDS (Field Emission Scanning Electron Microscopy-Energy Dispersion X-Ray Spectroscopy), XRD (X-Ray Diffraction), PSA (Particle Size Analyzer), VSM (Vibrating Sample Magnetometer), dan FT-IR (Fourrier Transformation-Infra Red). Hasil ester yang diperoleh dikarakterisasi dengan FT-IR, TGA (Thermogravimetric Analysis), dan uji emulsi sederhana. Hasil yang diperoleh dari analisis menggunakan FESEM didapatkan rata-rata ukuran dari nanopartikel Fe3O4 sebesar 32-58 nm dan nanopartikel Fe3O4-Polidopamin sebesar 35-77 nm. Dari penentuan persen loading lipase yang terimobilisasi diperoleh nilai sebesar 98,64%. Pada penelitian ini, dilakukan optimasi reaksi esterifikasi asam oleat dengan sorbitol menggunakan lipase terimobilisasi pada nanopartikel Fe3O4-Polidopamin dengan variasi rasio sorbitol:asam oleat, yaitu 1:30, 1:60, dan 1:90 serta pelarut organik yang digunakan adalah t-Butanol dan Metil-Isobutil-Keton (MIBK). Hasil penelitian ini menunjukkan bahwa kondisi optimum esterifikasi diperoleh pada rasio substrat 1:30 dengan menggunakan pelarut t-Butanol, dengan nilai persen konversi sebesar 23,56%.

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Sorbitol-oleic esters could be produced by esterification reaction using immobilized Candida rugosa lipase on Fe3O4-Polydopamine nanoparticles. In this study, Fe3O4 nanoparticles were synthesized by coprecipitation method and then modified using Polydopamine. Characterization of Fe3O4 nanoparticles, Fe3O4-Polidopamin, and Fe3O4-Polidopamin-Lipase is conducted by using FESEM (Field Emission Scanning Electronic Microscopy), EDS (Energy Dispersive Spectroscope), XRD (X-Ray Diffraction), PSA (Particle Size Analyzer), VSM (Vibrating Sample Magnetometer), and FT-IR (Fourrier Transformation-Infra Red). The esterification product was then characterized by using FT-IR, TGA (Thermogravimetric Analysis), and simple emulsion test. Using FESEM analysis, it was found that average particle size of Fe3O4 nanoparticles were 32-58 mm and nanopraticles Fe3O4-Polidopamin were 35-77 nm. The loading percentage of immobilized lipase on Fe3O4-Polidopamin was 98,64%. To optimize the esterification reaction using immobilized lipase on Fe3O4- Polidopamin the substrate ratio of sorbitol:oleic acid were varied, which are 1:30, 1:60, and 1:90. The variation of organic solvent used in this study were t-Butanol and Metyl-Isobutyl-Keton (MIBK). Research also found that the highest conversion percentage value was obtained in substrate-ratio 1:30 using t-Butanol as solvent, with the conversion value of 23,56%."

"[SFAEs (Sugar Fatty Acid Esters) atau ester asam lemak-gula dapat disintesis enzimatis menggunakan lipase Candida rugosa E.C.3.1.1.3 terimobilisasi pada nanopartikel Fe3O4-Kitosan antara asam lemak hidrolisat minyak sawit dan fruktosa. Nanopartikel Fe3O4-Kitosan disintesis dengan metode kopresipitasi dan dikarakterisasi menggunakan FTIR (Fourier Transform Infra Red), FESEM (Field Emission Scanning Electron Microscopy), TEM (Transmission Electron Microscopy), dan VSM (Vibrating Sample Magnetometer). Esterifikasi dilakukan menggunakan lipase terimobilisasi untuk pemakaian pertama dan berulang. Nilai persen loading pada lipase terimobilisasi yang diperoleh adalah sebesar 68,15%. dengan aktivitas sebesar 1,39 U/mg dan efisiensi imobilisasi sebesar 3,52%. Untuk lipase terimobilisasi pemakaian kedua didapatkan aktivitas spesifik sebesar 0,51 U/mg dengan efisiensi imobilisasi sebesar 1,28%. Reaksi esterifikasi dilakukan dalam pelarut organik yang berbeda yaitu t-butanol dan metil isobutil keton (MIBK). Persen konversi tertinggi diperoleh dengan pelarut t-butanol sebesar 28,09% dengan derajat substitusi (DS) ester 3 menggunakan lipase bebas, 21,80% dengan DS ester 2 menggunakan lipase terimobilisasi dan 16,81% dengan DS ester 2 menggunakan lipase terimobilisasi pemakaian kedua.

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Sugar Fatty Acid Esters (SFAEs) can be synthesized by an enzymatic esterification between palm oil fatty acid and fructose using immobilized Candida rugosa lipase E.C.3.1.1.3 on Fe3O4-Chitosan nanoparticles. Fe3O4-Chitosan nanoparticles were synthesized by using coprecipitation method and characterized using FTIR (Fourier Transform Infra Red), FESEM (Field Emission Scanning Electron Microscopy), TEM (Transmission Electron Microscopy), and VSM (Vibrating Sample Magnetometer). The esterification reaction was performed using immobilized lipase for first and second usage. The loading percentage value of immobilized lipase obtained in this study was 68.15% with the specific avtivity of the immobilized lipase and immobilization efficiency was 3.52%. For the second usage of immobilized lipase, the specific activity obtained was 0.51 U/mg and immobilization efficiency obtained was 1.28%. The solvents used in the esterification reaction are t-butanol and methyl isobutyl ketone (MIBK). The highest percentage conversion was obtained in t-butanol as a solvent using free lipase with the value of 28.09% and degree of substitution (DS) value of ester was 3. The conversion percentage using immobilized lipase was 21.80% and DS value of ester was 2. Last but not least, for the second usage of immo., Sugar Fatty Acid Esters (SFAEs) can be synthesized by an enzymatic esterification between palm oil fatty acid and fructose using immobilized Candida rugosa lipase E.C.3.1.1.3 on Fe3O4-Chitosan nanoparticles. Fe3O4-Chitosan nanoparticles were synthesized by using coprecipitation method and characterized using FTIR (Fourier Transform Infra Red), FESEM (Field Emission Scanning Electron Microscopy), TEM (Transmission Electron Microscopy), and VSM (Vibrating Sample Magnetometer). The esterification reaction was performed using immobilized lipase for first and second usage. The loading percentage value of immobilized lipase obtained in this study was 68.15% with the specific avtivity of the immobilized lipase and immobilization efficiency was 3.52%. For the second usage of immobilized lipase, the specific activity obtained was 0.51 U/mg and immobilization efficiency obtained was 1.28%. The solvents used in the esterification reaction are t-butanol and methyl isobutyl ketone (MIBK). The highest percentage conversion was obtained in t-butanol as a solvent using free lipase with the value of 28.09% and degree of substitution (DS) value of ester was 3. The conversion percentage using immobilized lipase was 21.80% and DS value of ester was 2. Last but not least, for the second usage of immo]"