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Abstrak :
[ABSTRAK
Latar belakang. Individu dewasa di masyarakat menunjukkan perubahan pola makan dan kurang aktivitas sehingga berisiko untuk menderita hiperkolesterolemia dan obesitas. Hiperkolesterolemia dapat diatasi dengan terapi nutrisi. Minyak bekatul mengandung zat aktif yang bekerja secara sinergis dan telah terbukti dari penelitian sebelumnya berperan dalam pengendalian lipid yaitu gamma-oryzanol, fitosterol, dan derivat vitamin E (tokotrienol dan tokoferol). Penelitian ini bertujuan untuk menilai perbaikan profil lipid pada pemberian minyak bekatul dengan jumlah yang berbeda tanpa merubah pola makan subyek. Metode. Uji klinis, desain paralel, alokasi acak selama 4 minggu pada laki-laki usia 19-55 tahun, kolesterol total 200-300 mg/dl, dan IMT 20-30 kg/m2. Subyek diambil secara konsekutif dan dibagi menjadi kelompok 45 ml/hari dan kelompok 15 ml/hari minyak bekatul. Sebelum perlakuan dilakukan wawancara data demografi, aktifitas fisik dan pemeriksaan antropometri. Asupan makan dinilai sebelum dan setelah perlakuan. Pemeriksaan laboratorium profil lipid dilakukan sebelum dan setelah perlakuan 4 minggu. Hasil. Dari total 20 subyek (10 subyek kelompok 45 ml/hari dan 10 subyek kelompok 15 ml/hari) didapatkan karakteristik yang setara antara kedua kelompok menurut usia, tingkat pendidikan, status gizi, aktivitas fisik, kebiasaan merokok, riwayat hiperkolesterolemia keluarga, antropometri dan profil lipid. Asupan makanan meliputi asupan energi, karbohidrat, protein, lemak dan serat sebelum perlakuan tidak berbeda bermakna antara kelompok. Asupan lemak setelah perlakuan berbeda bermakna antara kedua kelompok dikarenakan perbedaan pemberian jumlah minyak. Setelah perlakuan selama 4 minggu, didapatkan penurunan kolesterol total secara statistik berbeda bermakna antara kedua kelompok (p=0,049). Pada kelompok 45 ml/hari kadar kolesterol total turun sebanyak 14% dan pada kelompok 15 ml/hari terjadi penurunan kadar kolesterol total 7,8%. Penurunan LDL dan trigliserida serta peningkatan HDL secara statistik tidak berbeda bermakna antara dua kelompok (p >0,05). Pada penelitian ini tidak terjadi perubahan berat badan yang bermakna pada kedua kelompok. Kesimpulan. Konsumsi minyak bekatul 45 ml/hari menyebabkan perbaikan profil lipid yang lebih baik dibandingkan konsumsi minyak bekatul 15 ml.hari.

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ABSTRACT
Background. Adult individuals in Indonesian society showed changes in diet pattern and lack of physical activity that increasing risk for hypercholesterolemia and obesity. Hypercholesterolemia would be treated with nutritional therapy. Rice bran oil contains active substances (gamma-oryzanol, phytosterols, and derivatives of vitamin E (tocotrienols and tocopherols) that work in synergy and have been proven on previous research controlling lipid profil. This study aimed to assess the lipid profile improvement in intake of rice bran oil with different amounts without changing the eating patterns of the subjects. Methods. It was parallel and randomized clinical trial for 4 weeks in male with 19-55 years of age, total cholesterol level 200-300 mg/dl, and BMI of 20−30 kg/m2. All subjects were recruited consecutively and classified into two groups that received 45 ml/day or 15 ml/day rice bran oil for 4 weeks. The demographic data interviews, physical activity and anthropometric examination were taken before intervention. Food intake were assessed before and after intervention. Laboratory test of lipid profile performed before and after 4 weeks of treatment. Results. A total of 20 subjects consisting of 10 subjects with 45 ml/day rice bran oil and 10 subjects with 15 ml/day had obtained similar characteristics in age, education level, nutritional status, physical activity, smoking, family history of hypercholesterolemia, BMI and lipid profiles. Food intake includes intake of energy, carbohydrate, protein, fat and fiber before treatment did not significantly difference between two groups. Fat intake after treatment was significantly different between the two groups due to differences in the amount of oil. After 4 weeks treatment, there was a decrease in total cholesterol significantly different between the two groups (p = 0,049). In the group that received 45 ml/ day of rice bran oil total cholesterol level decreased 14% and in the group of 15 ml/day total cholesterol level decreased 7,8%. The reduction of LDL and triglycerides and the increasing of HDL was not significantly different between the two groups (p >0,05). In this study, no changes in body weight were significant in both groups. Conclusion. Rice bran oil consumption 45 ml/day led to improvements in lipid profiles better than consumption 15 ml/day;Background. Adult individuals in Indonesian society showed changes in diet pattern and lack of physical activity that increasing risk for hypercholesterolemia and obesity. Hypercholesterolemia would be treated with nutritional therapy. Rice bran oil contains active substances (gamma-oryzanol, phytosterols, and derivatives of vitamin E (tocotrienols and tocopherols) that work in synergy and have been proven on previous research controlling lipid profil. This study aimed to assess the lipid profile improvement in intake of rice bran oil with different amounts without changing the eating patterns of the subjects. Methods. It was parallel and randomized clinical trial for 4 weeks in male with 19-55 years of age, total cholesterol level 200-300 mg/dl, and BMI of 20−30 kg/m2. All subjects were recruited consecutively and classified into two groups that received 45 ml/day or 15 ml/day rice bran oil for 4 weeks. The demographic data interviews, physical activity and anthropometric examination were taken before intervention. Food intake were assessed before and after intervention. Laboratory test of lipid profile performed before and after 4 weeks of treatment. Results. A total of 20 subjects consisting of 10 subjects with 45 ml/day rice bran oil and 10 subjects with 15 ml/day had obtained similar characteristics in age, education level, nutritional status, physical activity, smoking, family history of hypercholesterolemia, BMI and lipid profiles. Food intake includes intake of energy, carbohydrate, protein, fat and fiber before treatment did not significantly difference between two groups. Fat intake after treatment was significantly different between the two groups due to differences in the amount of oil. After 4 weeks treatment, there was a decrease in total cholesterol significantly different between the two groups (p = 0,049). In the group that received 45 ml/ day of rice bran oil total cholesterol level decreased 14% and in the group of 15 ml/day total cholesterol level decreased 7,8%. The reduction of LDL and triglycerides and the increasing of HDL was not significantly different between the two groups (p >0,05). In this study, no changes in body weight were significant in both groups. Conclusion. Rice bran oil consumption 45 ml/day led to improvements in lipid profiles better than consumption 15 ml/day, Background. Adult individuals in Indonesian society showed changes in diet pattern and lack of physical activity that increasing risk for hypercholesterolemia and obesity. Hypercholesterolemia would be treated with nutritional therapy. Rice bran oil contains active substances (gamma-oryzanol, phytosterols, and derivatives of vitamin E (tocotrienols and tocopherols) that work in synergy and have been proven on previous research controlling lipid profil. This study aimed to assess the lipid profile improvement in intake of rice bran oil with different amounts without changing the eating patterns of the subjects. Methods. It was parallel and randomized clinical trial for 4 weeks in male with 19-55 years of age, total cholesterol level 200-300 mg/dl, and BMI of 20−30 kg/m2. All subjects were recruited consecutively and classified into two groups that received 45 ml/day or 15 ml/day rice bran oil for 4 weeks. The demographic data interviews, physical activity and anthropometric examination were taken before intervention. Food intake were assessed before and after intervention. Laboratory test of lipid profile performed before and after 4 weeks of treatment. Results. A total of 20 subjects consisting of 10 subjects with 45 ml/day rice bran oil and 10 subjects with 15 ml/day had obtained similar characteristics in age, education level, nutritional status, physical activity, smoking, family history of hypercholesterolemia, BMI and lipid profiles. Food intake includes intake of energy, carbohydrate, protein, fat and fiber before treatment did not significantly difference between two groups. Fat intake after treatment was significantly different between the two groups due to differences in the amount of oil. After 4 weeks treatment, there was a decrease in total cholesterol significantly different between the two groups (p = 0,049). In the group that received 45 ml/ day of rice bran oil total cholesterol level decreased 14% and in the group of 15 ml/day total cholesterol level decreased 7,8%. The reduction of LDL and triglycerides and the increasing of HDL was not significantly different between the two groups (p >0,05). In this study, no changes in body weight were significant in both groups. Conclusion. Rice bran oil consumption 45 ml/day led to improvements in lipid profiles better than consumption 15 ml/day]

Abstrak :
Bekatul merupakan produk samping dari proses penggilingan padi yang dimanfaatkan dalam bentuk minyak bekatul karena mengandung senyawa bioaktif yang baik untuk kesehatan, salah satunya tokotrienol. Tokotrienol merupakan salah satu komponen vitamin E yang larut dalam lemak serta memiliki sifat antioksidan yang sangat kuat. Peningkatan kandungan tokotrienol pada minyak bekatul dapat dilakukan dengan proses fermentasi menggunakan kapang Aspergillus terreus. Faktor yang memengaruhi proses fermentasi bekatul di antaranya waktu inkubasi dan rasio C/N. Penelitian ini memvariasikan waktu inkubasi pada proses fermentasi selama 3, 4, 5, 6, dan 7 hari, serta rasio C/N sebesar 25, 30, 35, 40, dan 45 melalui penambahan glukosa dan pepton. Bekatul hasil fermentasi diekstraksikan dengan menggunakan metode Green Bligh-Dyer untuk memperoleh minyak bekatul. Bekatul diekstraksikan dengan pelarut etil asetat, etanol, dan KCl 0,58% dalam aquades dengan rasio 48:17:35 (v/v/v). Kandungan tokotrienol pada minyak bekatul dianalisis menggunakan instrumen High Performance Liquid Chromatography (HPLC). Hasil penelitian ini menunjukkan bahwa waktu inkubasi terbaik untuk meningkatkan kadar tokotrienol dalam minyak bekatul adalah selama 5 hari, dengan peningkatan sebesar 421,74% (b/v). Sementara itu, variasi rasio C/N tidak berpengaruh terhadap peningkatan kadar tokotrienol dalam minyak bekatul. ......Rice bran is a by-product of the rice milling process which is utilized in the form of rice bran oil, because it contains bioactive compounds that are good for health. One of the bioactive ingredients in bran oil is tocotrienols. Tocotrienols are a component of fat-soluble vitamin E and have very strong antioxidant properties. Enhancement of the tocotrienol content in rice bran oil can be carried out by a fermentation process using Aspergillus terreus. Some factors that affect the rice bran fermentation process are incubation time and ratio of C/N. This study varied the incubation time in the fermentation process for 3, 4, 5, 6, and 7 days, as well as a C/N ratio of 25, 30, 35, 40, and 45 through the addition of glucose and peptone. Fermented rice bran was extracted through the Green Bligh-Dyer method to obtain rice bran oil. Rice bran was extracted by ethyl acetate, ethanol and KCl 0,58% in aquades with the ratio of 48:17:35 (v/v/v). Tocotrienol content in rice bran oil was analyzed using High Performance Liquid Chromatography (HPLC) instruments. The results of this study indicated that the best incubation time for increasing tocotrienol levels was 5 days, with an increase of 421,71% (w/v). Meanwhile, variation of C/N ratio did not affect the increase in tocotrienol levels in rice bran oil.

Abstrak :
Tokotrienol adalah anggota dari keluarga vitamin E dengan sifat neuroprotektif, antioksidan, antikanker, dan penurun kolestrol. Salah satu sumber dari senyawa tokotrienol adalah bekatul. Tokotrienol tersebut dapat diperoleh dari minyak bekatul yang merupakan salah satu minyak nabati dengan kandungan tokotrienol tertinggi. Untuk memperkaya kadar tokotrienol dalam minyak bekatul, dilakukan fermentasi pada bekatul dengan kapang Aspergillus terreus. Penelitian ini mengamati pengaruh variasi rasio pelarut metanol:kloroform:air dan fermentasi dengan kapang Aspergillus terreus saat melakukan proses ekstraksi terhadap peningkatan perolehan tokotrienol dalam minyak bekatul. Pada penelitian ini, dilakukan solid state fermentation pada bekatul sebelum minyak bekatul diekstraksi dengan metode Bligh-Dyer dan dianalisis dengan instrumen spektrofotometri UV dan GC/MS untuk mengetahui kadar tokotrienol dalam minyak bekatul. Hasil penelitian ini menunjukkan bahwa rasio pelarut metanol:kloroform:air terbaik untuk peningkatan perolehan tokotrienol hasil ekstraksi adalah pada rasio metanol:kloroform:air 1:1:0,9 (v/v/v), dengan peningkatan perolehan konsentrasi tokotrienol dari 2541,44 ppm menjadi  3642,79 ppm, dan proses fermentasi meningkatkan kadar tokotrienol dalam minyak bekatul dari 2541,44 ppm menjadi 3257,66 ppm. Senyawa antioksidan yang teridentifikasi pada ekstrak minyak bekatul antara lain asam n-heksadekanoat, asam benzoat, dan asam klorogenat. ......Tocotrienols are members of the vitamin E family with neuroprotective, antioxidant, anticancer, and cholesterol-lowering properties. One source of tocotrienols is rice bran. Tocotrienols can be obtained from rice brain oil, which is one of the vegetable oils with the highest tocotrienol content. To enrich the levels of tocotrienols in rice brain oil, the rice bran will be fermented with the fungus Aspergillus terreus. This study observed the effect of variations in the solvent ratio of methanol:chloroform:water and fermentation by utilizing the fungus Aspergillus terreus during the process of extraction to increase the tocotrienol levels in rice bran oil. In this study, solid state fermentation will be carried out on the rice bran before the rice bran oil is extracted by using the Bligh-Dyer method and analyzed with UV spectrophotometer and GC/MS to determine the tocotrienol levels in rice bran oil. The results of this study showed how the optimum solvent ratio of methanol:chloroform:water to increase the extraction of tocotrienols was the ratio of methanol:chloroform:water 1:1:0,9 (v/v/v), with an increase in tocotrienol concentration from 2541,44 ppm to 3642,79 ppm, and how fermentation increased the tocotrienol levels in the extracted rice bran oil from 2541,44 ppm to 3257,66 ppm. The antioxidant compounds identified in rice bran oil extract include n-hexadecanoic acid, benzoic acid, and chlorogenic acid.

Abstrak :
Bekatul umumnya digunakan sebagai pakan ternak atau dibuang. Padahal, bekatul dapat diekstraksi menjadi minyak bekatul yang mengandung antioksidan untuk melindungi diri dari radikal bebas yang menyebabkan stress oksidatif. Penelitian ini merupakan penelitian eksperimental menggunakan sampel tersimpan 24 tikus wistar terbagi dalam enam kelompok, yaitu kelompok kontrol, kelompok diberikan CCl4 0,55g/kgBB kemudian dibedah 2 hari setelahnya, kelompok diberikan minyak bekatul 0,5mL/hari selama 52 hari kemudian diberikan CCl4 0,55g/kgBB kemudian dibedah 2 hari setelahnya, kelompok diberikan minyak bekatul 1,5 mL/hari selama 52 hari kemudian diberikan CCl4 0,55g/kgBB kemudian dibedah 2 hari setelahnya, kelompok diberikan CCl4 0,55g/kgBB kemudian 2 hari setelahnya diberi minyak bekatul 0,5mL/hari selama 59 hari kemudian dibedah esoknya, kelompok diberikan CCl4 0,55g/kgBB kemudian 2 hari setelahnya diberi minyak bekatul 1,5mL/hari selama 59 hari kemudian dibedah esoknya. Selanjutnya mengukur absorbansi lalu menghitung MDA plasma dengan membandingkan absorbansinya dengan standar MDA. Kelompok CCl4 0,55 g/kgBB memiliki MDA lebih tinggi dibandingkan kelompok kontrol secara signifikan. MDA kelompok minyak bekatul 0,5 ml dan 1,5 ml kemudian diinduksi CCl4 0,55 g/kgBB lebih rendah dibandingkan kelompok CCl4 meskipun tidak signifikan. MDA kelompok CCl4 kemudian diberikan minyak bekatul lebih rendah dibandingkan kelompok CCl4 meskipun tidak signifikan. Minyak bekatul 0,5 ml maupun 1,5 ml menurunkan MDA plasma dibandingkan kelompok CCl4 dalam preventif maupun kuratif meskipun tidak signifikan. MDA kelompok preventif lebih rendah dibandingkan kuratif meskipun tidak signifikan. Dosis 1,5 ml menurunkan MDA plebih besar dibandingkan 0,5 ml meskipun tidak signifikan. ......Rice bran used as animal feed or discarded. But, rice bran can be extracted into oil contains antioxidants to protect body from free radicals that cause oxidative stress. It is an experimental study using stored samples of 24 wistar rats divided into six groups: control group, group given CCl4 0.55g/kgBW then dissected 2 days later, group given rice bran oil 0.5mL/day for 52 days then given CCl4 0.55g/kgBW then operated 2 days later, group given rice bran oil 1.5 mL/day for 52 days then given CCl4 0,55g/kgBW then operated 2 days later, group given CCl4 0,55g/kgBW then 2 days later given rice bran oil 0.5mL/day for 59 days then operated next day, group given CCl4 0.55g/kgBB then 2 days later given rice bran oil 1.5mL/day for 59 days then operated tomorrow. Measuring absorbance and calculate plasma MDA by comparing absorbance with MDA standard. 0.55g/kgBW CCl4 group have significantly higher MDA than control group. MDA of 0.5ml and 1.5ml rice bran oil group then induced by CCl4 0.55 g/kgBW is lower than CCl4 group although not significant. MDA of CCl4 group then given rice bran oil is lower than CCl4 group although not significant. Rice bran oil 0.5ml and 1.5ml decreased plasma MDA compared to CCl4 group in both preventive and curative, although not significant. MDA of preventive group is lower than curative group, although not significant. 1.5ml dose decrease MDA more than 0.5ml, although not significant.

Abstrak :
Gamma oryzanol dalam Rice Bran Oil (RBO) telah diteliti melindungi mukosa dengan menghambat sekresi asam dan bertindak sebagai prekusor pada sintesis prostaglandin sehingga diduga berpotensi sebagai gastroprotektif. Penelitian ini bertujuan untuk mendapatkan formulasi mikrokapsul RBO dengan kadar γ-oryzanol tertinggi dan untuk mengetahui efek gastroprotektif mikrokapsul RBO pada tikus yang diinduksi indometasin (80 mg/kg bb). Response Surface Metodology (RSM) Box-Behnken dengan 3 faktor digunakan untuk mengoptimasi kondisi pembuatan mikrokapsul. Dilakukan karakterisasi terhadap kadar tertinggi γ-oryzanol, Scanning Electron Microscope (SEM), particle size distribution, swelling ratio, efisiensi penjerapan, dan disolusi in vitro. Uji aktivitas gastroprotektif dibagi menjadi 7 kelompok yang diberikan aquades, indometasin (80 mg/kg bb), omeprazole 40 mg/kg bb, mikrokapsul RBO (160 mg/200 g bb, 320 mg/200 g bb) dan RBO (0.1 ml/200 g bb; 0.2 ml/200 g bb) secara oral selama 7 hari. Pengamatan dilakukan pada % inhibsi ulkus, derajat keasaman lambung, determinasi mukus serta gambaran histopatologi lambung tikus. Hasil optimasi RSM menunjukkan formula R 11 memberikan kadar γ-oryzanol paling tinggi dengan perbandingan 1,5% natrium alginat:RBO:emulgator (60%:30%:10%) sebesar 0,75%. Hasil SEM menunjukkan permukaan yang berpori dengan distribusi ukuran partikel rata-rata 647,013±41,68 µm. Hasil % swelling ratio tertinggi pada medium HCl sebesar 44,43%±1,01 pada menit ke 60 dan pada medium aquades sebesar 191,74%±1,85 pada menit ke 240. Hasil efisiensi penjerapan tertinggi sebesar 2,48% dan hasil uji disolusi menunjukkan jumlah γ-oryzanol yang terdisolusi sebesar 9,56 % pada medium HCl pH 1,2 dan 50,65% pada medium dapar fosfat. Hasil uji aktivitas gastroprotektif menunjukkan pemberian mikrokapsul RBO dan RBO dapat menaikkan % inhbisi ulkus secara signifikan dibandingkan dengan kontrol negatif (p <0.05). Hasil pemeriksaan derajat keasaman lambung menunjukkan mikrokapsul RBO dapat menurunkan derajat keasaman lambung (1,7919 µek/200 g bb). Hasil determinasi mukus menunjukkan lambung tikus yang diberikan mikrokapsul RBO memiliki ketebalan mukus lebih tinggi (0,89586/g bb) jika dibandingkan dengan kelompok negatif. Analisis lebih lanjut pada evaluasi histopatologi menunjukkan peningkatan proteksi dilihat dari rendahnya edema, erosi hemoragik, kongesti kapiler dan infiltrasi leukosit pada submukosa. Hasil penelitian menunjukkan bahwa Mikrokapsul RBO berpotensi sebagai gastroprotektif pada tikus yang diinduksi indometasin. ...... Gamma oryzanol content in Rice Bran Oil (RBO) has been studied to protect gastric mucosa by inhibition of acid secretion that stimulated by histamine receptor and also act as a precursor to prostaglandin synthesis. The objective of this research was to obtained the formulation of RBO microcapsules with highest γ-oryzanol content and to evaluated the gastroprotective effect of RBO microcapsules on indomethacin-induced gastric ulcers in rats. The Response Surface Metodology (RSM) Box-Behnken design on three factors was used to optimize the microencapsulation conditions. Gamma oryzanol content, Scanning Electron Microsope (SEM), particle size distribution, swelling ratio, entrapment efficiency and in vitro dissolution was also characterized. The gastroprotective study was performed on 7 groups who are administered orally the treatment of aquadest, indomethacin (80 mg/kg BW), omeprazole (40 mg/kg BW), RBO microcapsules (160 mg/200 g BW and 320 mg/200 g BW) and RBO (0,1 ml/200 g BW and 0,2 ml/200 g BW) for seven days. The effect on % inhibition, gastric content, determination of mucous stomach and histopathological analysis were also evaluated. The optimization result was on formula R 11 by comparison of 1,5% sodium alginate:RBO:emulgator (60%:30%:10%) was 0,75%. The SEM shown porous surface and the average of particle distribution was 647±68 µm. The highest swelling ratio was 44,43%±1,01 in HCl medium and 191,74%±1,85 in aquadest. The highest entrapment efficiency was 2,48% and the in vitro dissolution was 9,56% in simulated gastric fluid and 50,65% in simulated intestine fluid. The gastroprotective result showed that RBO microcapsules treatment could significantly reduced ulcer index in indomethacininduced gastric ulcers compared with negative control (p < 0.05). The RBO microcapsules can reduce gastric content (1,7919 µek/200 g BW) and also highest determination of mucous (0,89586/g BW) compared with negative control. Further evaluation on HE revealed higher protection characterized by lower edema,capiler congestion, mild hemorrhagic erosion and lower leucocyte infiltration in submucosa. This research shown that RBO microcapsules have potential to be gastroprotective agent by indomethacin-induced gastric ulcers in rats.

Abstrak :
Latar belakang: Dikarenakan fungsinya, hati merupakan organ yang rentan mengalami hepatotoksisitas. Oleh karena itu, senyawa yang diduga memiliki efek hepatoprotektif banyak diteliti. Salah satu bahan tersebut berupa minyak bekatul, yakni ekstrak minyak dari lapisan luar beras. Kandungan bahan aktifnya banyak dimanfaatkan dalam bidang kesehatan termasuk pada penyakit hati sehingga diduga minyak bekatul memiliki efek hepatoprotektif yang melindungi dan menyembuhkan hati dari hepatotoksisitas. Tujuan: Membuktikan bahwa minyak bekatul memiliki sifat hepatoprotektif terhadap hepatotoksisitas. Metode: Uji eksperimental pada 6 kelompok tikus Sprague dawley. Hepatotoksisitas diinduksi oleh CCl4 dengan dosis 0,55 g/KgBB sebanyak 1 kali secara oral. Minyak bekatul diberikan dalam 2 dosis untuk kelompok tikus yang berbeda, yakni 500 μL dan 1,5 mL. Pemberian minyak bekatul dilakukan setiap hari selama 8 minggu sebelum (preventif) atau setelah (kuratif) induksi hepatotoksisitas. Jarak antara induksi hepatotoksisitas dan pemberian minyak bekatul adalah 48 jam. Marker hepatotoksisitas yang diukur berupa serum ALT. Hasil: Kelompok yang diberikan minyak bekatul, baik sebagai agen preventif dan agen kuratif serta baik dalam dosis 500 μL dan 1,5 mL memiliki level serum ALT yang lebih rendah dibandingkan kelompok yang hanya diberikan CCl4 (p < 0,05). Simpulan: Minyak bekatul memiliki sifat hepatoprotektif baik sebagai agen preventif maupun kuratif terhadap hepatotoksisitas diinduksi CCl4. ......Background: Liver is prone to hepatotoxicity because of its function. For this reason, compounds that may have hepatoprotective attribute are searched extensively. One of those compounds is rice bran oil, an extract from the rice’s outer layer. Rice bran oil has many active components that are found to be beneficial in medical treatment, including liver disease. Therefore oil rice brain is thought to have hepatoprotective properties that may protect and cure liver from hepatotoxivity. Aim: Evaluate rice bran oil’s hepatoprotective properties against hepatotoxicity. Methods: This experimental study used six different groups of Sprague dawley. Hepatotoxicity in mouse is induced using 0,5g/KgBW of single-dose CCl4 orally. Rice bran oil was given in 2 separate doses, 500 μL dan 1,5 mL. Rice bran oil was administered for 8 weeks before (in preventive group) and after (in curative group) hepatotoxicity induction with 48 hours interval separating those two interventions. Serum ALT was investigated to evaluate hepatotoxicity. Results: Group administered with rice bran oil as a preventive agent and curative agent with either 500 μL or 1,5 mL dose have low levels of serum ALT compared to CCl4 control group (p < 0,05). Conclusion: Rice bran oil has hepatoprotective properties, both as a preventive agent and a curative agent against CCl4 induced hepatotoxicity.

Abstrak :
Bekatul merupakan limbah yang dihasilkan saat proses penggilingan padi. Bekatul dapat digunakan sebagai bahan baku penghasil minyak dengan melewati proses ekstraksi. Minyak bekatul bermanfaat bagi kesehatan karena mengandung senyawa bioaktif. Salah satu senyawa bioaktif yang terkandung dalam minyak bekatul adalah tokotrienol. Tokotrienol merupakan senyawa keluarga bagian vitamin E. Pengayaan tokotrienol dalam minyak bekatul dapat dilakukan dengan fermentasi padat (solid state fermentation) menggunakan kapang Aspergillus terreus. Proses fermentasi dipengaruhi oleh beberapa faktor, salah satunya adalah waktu inkubasi. Penelitian ini mengkaji pengaruh waktu inkubasi kapang untuk mengetahui kandungan tokotrienol dalam minyak bekatul hasil fermentasi. Variasi waktu inkubasi dengan rentang 3-7 hari dilakukan untuk menentukan waktu inkubasi optimum dari Aspergillus terreus. Setelah melalui proses fermentasi, bekatul diekstraksi dengan metode ekstraksi Bligh Dyer termodifikasi untuk mengekstrak bekatul. Pada penelitian ini dilakukan analisis kandungan tokotrienol terhadap minyak bekatul dengan menggunakan instrumen Spektrofotometri UV dan Gas Chromatography /Mass Spectrometry (GC/MS). Hasil penelitian menunjukkan bahwa waktu inkubasi untuk pengayaan tokotrienol dalam minyak bekatul dengan menggunakan Aspergillus terreus, yaitu selama 5 hari dengan kandungan tokotrienol semula 2005,405 ppm menjadi 3789,189 ppm dengan persentase peningkatan sebesar 88,95%. Senyawa bioaktif yang terdapat dalam minyak bekatul setelah proses fermentasi adalah senyawa fenol, asetofenon, benzil salisilat, asam lemak MUFA (Monounsaturated Fatty Acid) dan PUFA (Polyunsaturated Fatty Acid). ......Rice bran is a waste generated during the rice milling process. Rice bran can be used as raw material for producing oil by going through the extraction process. Rice bran oil is beneficial for health because it contains bioactive compounds. One of the bioactive compounds contained in rice bran oil is tocotrienols. Tocotrienols are part of the vitamin E family. Enrichment of tocotrienols in rice bran oil can be carried out by solid state fermentation using the Aspergillus terreus. The fermentation process is influenced by several factors, one of which is incubation time. This research examined the effect of fungi incubation time to determine the content of tocotrienols in fermented rice bran oil. Variations in incubation time with a range of 3-7 days were carried out to determine the optimum incubation time of Aspergillus terreus. After going through the fermentation process, the bran will be extracted using a modified Bligh Dryer extraction method to extract bran. In this research, an analysis of the tocotrienol content of rice bran oil will be carried out using UV Spectrophotometry and Gas Chromatography /Mass Spectrometry (GC/MS) instruments. The results showed that the incubation time for enrichment of tocotrienols in rice bran oil using Aspergillus terreus was 5 days with tocotrienol content from 2005,405 ppm to 3789,189 ppm with an increase of 88.95% percentage. The bioactive compounds contained in rice bran oil after the fermentation process are phenolic compounds, acetophenone, benzyl salicylate, MUFA (Monounsaturated Fatty Acid) and PUFA (Polyunsaturated Fatty Acid) fatty acids.

Abstrak :
Bekatul merupakan hasil produk samping dari penggilingan padi ketiga yang biasanya dimanfaatkan untuk pakan ternak karena kandungan nutrisinya. Bekatul dapat dimanfaatkan lebih luas dengan diekstrak menjadi minyak bekatul, yang merupakan minyak dengan kandungan asam lemak tak tinggi sehingga baik untuk mengurangi risiko penyakit jantung. Kandungan senyawa yang dimiliki oleh minyak bekatul dapat dimanfaatkan lebih luas dengan metode isolasi atau pemurnian. Salah satu kandungan yang memiliki potensi pemanfaatan yang baik bagi kesehatan adalah kandungan senyawa antioksidan pada minyak bekatul. Dalam proses isolasi, metode yang biasa digunakan adalah kromatografi. Metode ini mampu memisahkan senyawa berdasarkan perbedaan distribusi antara fase diam dan fase gerak. Komposisi fase gerak merupakan salah satu faktor yang berpengaruh terhadap hasil isolasi senyawa. Penelitian ini bertujuan untuk menentukan komposisi fase gerak terbaik dalam mengisolasi senyawa antioksidan pada minyak bekatul serta mengidentifikasi senyawa yang berhasil terisolasi berdasarkan komposisi tersebut. Pada penelitian ini, minyak bekatul diperoleh melalui ekstraksi dengan metode Green Bligh-Dyer dengan dengan pelarut etil asetetat:etanol:air 6,37:1:4,13 (b/b/b). Minyak ini diuji dengan kromatografi lapis tipis dan bantuan instrumen reveleris menggunakan berbagai variasi komposisi pelarut, dan didapatkan variasi terbaik yakni Heksana:DCM:(Etanol + 1% Asam Asetat 10%). Senyawa antioksidan yang teridentifikasi dengan LC-MS/MS-QToF terbanyak adalah asam α-linolenat. Senyawa lainnya yang teridentifikasi dengan kelimpahan yang besar adalah piperin, heksakosil (E)-ferulat, dan 1-(2-[(4-Asetil- 1-piperazinil) metil]-1-metil-1H-benzimidazol-5-il)-3-sikloheksilurea. ......Rice bran is a byproduct of the third stage of rice milling, typically used as animal feed due to its nutritional content. Rice bran can be utilized more extensively by extracting it into rice bran oil, which is low in saturated fats and thus beneficial for reducing the risk of heart disease. The compounds present in rice bran oil can be further utilized through isolation or purification methods. One compound with potential health benefits is the antioxidant compound found in rice bran oil. In the isolation process, chromatography is commonly used. This method separates compounds based on their distribution between a stationary phase and a mobile phase. The composition of the mobile phase is a critical factor influencing the isolation results.This study aims to determine the optimal mobile phase composition for isolating antioxidant compounds in rice bran oil and to identify the isolated compounds based on this composition. In this research, rice bran oil was obtained through extraction using the Green Bligh-Dyer method with ethyl acetate:ethanol solvent at a ratio of 6.37:1:4.13 (w/w/w). This oil was tested using thin-layer chromatography and with the help of the reveleris instrument using various solvent compositions. The most effective composition found was Hexane:DCM:(Ethanol + 1% Acetic Acid 10%). The antioxidant compound identified in highest abundance by LC-MS/MS-QToF was alpha-linolenic acid. Other identified compounds in significant abundance were piperine, hexacosyl (E)-ferulate, and 1-(2-[(4-acetyl-1- piperazinyl)methyl]-1-methyl-1H-benzimidazol-5-yl)-3-cyclohexylurea.

Abstrak :
Bekatul merupakan salah satu produk sampingan sebanyak 10% dari seluruh hasil penggilingan padi. Bekatul mengandung sekitar 12-18,5% minyak bekatul yang menjadi sumber senyawa-senyawa bioaktif yang bermanfaat. Kandungan-kandungan bioaktif dan asam lemak di dalam minyak bekatul dapat dimanfaatkan pada bidang kesehatan. Peningkatan hasil rendemen minyak bekatul dapat dilakukan dengan melakukan proses fermentasi padat menggunakan kapang Aspergillus terreus. Faktor yang dapat mempengaruhi proses fermentasi bekatul diantaranya adalah rasio massa penambahan sumber nutrisi dan jenis sumber nitrogen tambahan. Penelitian ini memvariasikan rasio massa penambahan karbon dan nitrogen sebagai sumber nutrisi sebesar 25:1, 30:1, 35:1, 40:1, dan 45:1. Kedua faktor tersebut dapat mempengaruhi hasil metabolisme kapang dalam peningkatan asam lemak. Bekatul yang telah difermentasi, akan diekstraksi menggunakan metode sonikasi secara bertingkat dengan pelarut n-heksana dan etanol. Analisis kandungan yang terdapat di dalam minyak bekatul akan dilakukan dengan menggunakan instrumen Liquid Chromatography-Mass Spectrometry (LC-MS). Hasil penelitian ini menunjukkan bahwa jenis nitrogen tambahan yang cocok untuk sumber nutrisi Aspergillus terreus pada fermentasi padat dengan medium bekatul adalah jenis nitrogen organik (pepton) dengan rendemen minyak bekatul sebesar 10,46% dan rasio massa penambahan sumber nutrisi karbon dan nitrogen adalah rasio 45:1 dengan rendemen minyak bekatul sebesar 10,40%. Proses ekstraksi dari sampel hasil fermentasi padat bekatul dengan kapang Aspergillus terreus untuk menghasilkan minyak bekatul terbanyak adalah dengan menggunakan pelarut polar (etanol). Senyawa antioksidan yang teridentifikasi pada ekstrak minyak bekatul yaitu asam linoleat dan asam a-linolenat ......Rice bran is one of the by-products, accounting for about 10% of the total rice milling yield. Rice bran contains approximately 12-18.5% rice bran oil, which serves as a source of beneficial bioactive compounds. The bioactive contents and fatty acids in rice bran oil is beneficial for health. To increase the rice bran oil yield, solid-state fermentation processes can be conducted using Aspergillus terreus. Factors affecting the rice bran fermentation process include the mass ratio of nutrient sources addition in fermentation medium and the addition of nitrogen sources. This study varied the mass ratio of carbon and nitrogen addition as a nutrient source in fermentation medium at 25:1, 30:1, 35:1, 40:1, and 45:1. Both factors can affect fungal metabolism and the increase in fatty acids during rice bran fermentation. After that, the result of rice bran fermentation process will undergo an extraction process using a multi-step sonication method with n-hexane and ethanol as solvents. The content of rice bran oil will be analyze using Liquid Chromatography-Mass Spectrometry (LC-MS). The results of this study indicate that the suitable type of additional nitrogen for Aspergillus terreus nutrition in solid-state fermentation with rice bran medium is organic nitrogen (peptone), yielding rice bran oil at 10,46%. The optimal mass ratio of added carbon and nitrogen nutrients is 45:1, resulting in a rice bran oil yield of 10.40%. The extraction process of rice bran oil from the solid-state fermentation sample with Aspergillus terreus is most effective using a polar solvent (ethanol). The identified antioxidant compounds in the rice bran oil extract include linoleic acid and a-linolenic acid.

Abstrak :
Latar belakang: Diabetes melitus (DM) tipe 2 merupakan salah satu masalah kesehatan global. Terdapat hubungan signifikan antara stres oksidatif dan perkembangan DM tipe 2. Untuk mengatasi stres oksidatif, dibutuhkan antioksidan. Minyak bekatul memiliki kandungan antioksidan tinggi seperti vitamin E dan γ-oryzanol, serta minyak zaitun memiliki antioksidan utama berupa biofenol. Oleh sebab itu, penelitian ini bertujuan untuk mengevaluasi pengaruh pemberian minyak bekatul dan minyak zaitun secara oral terhadap kadar malondialdehid (MDA) sebagai parameter stres oksidatif. Metode: Sebanyak 10 serum darah tersimpan dari subjek DM tipe 2 yang dibagi menjadi dua kelompok dengan randomisasi blok. Kelompok pertama diberikan minyak bekatul secara oral pada dosis 15 mL/hari, sedangkan kelompok kedua diberikan minyak zaitun secara oral pada dosis 15 mL/hari yang dilakukan selama empat minggu. Kemudian dilakukan wash out selama dua minggu dan disilang (crossover). Kadar MDA diukur menggunakan metode Wills. Hasil: Hasil penelitian menunjukkan rata-rata kadar MDA serum pada perlakuan minyak bekatul maupun minyak zaitun lebih rendah dibandingkan praperlakuan meskipun tidak signifikan secara statistik dengan masing- masing P=0,377 dan P=0,357. Selain itu, tidak terdapat variasi dari efek perlakuan minyak bekatul dan minyak zaitun dengan P=0,568. Kesimpulan: Kadar MDA serum pada subjek DM tipe 2 setelah pemberian minyak bekatul dan minyak zaitun cenderung menurun namun tidak berbeda bermakna, serta tidak ada perbedaan variasi efek diantara keduanya. ......Introduction: Diabetes mellitus (DM) type 2 is one of the global health problems. There is a significant association between oxidative stress and the progression of DM type 2. To overcome oxidative stress, antioxidants are needed. Rice bran oil contains high antioxidant content such as vitamin E and γ-oryzanol, and olive oil has the main antioxidant in the form of biophenol. Hence, this study aimed to evaluate the effect of oral administration of rice bran oil and olive oil on malondialdehyde (MDA) levels as a parameter of oxidative stress. Method: A total of 10 stored blood serum from DM type 2 subjects were divided into two groups with block randomization. The first group was administrated orally of rice bran oil at a dose of 15 mL/day, while the second group was given olive oil orally at a dose of 15 mL/day, both for 4 weeks. There is wash out period for 2 weeks, then cross them over. The level of MDA was measured using Wills method. Result: The results showed that the average of MDA serum level in the rice bran oil and olive oil group were lower than the pre-experiment group although they were not statistically significant with P=0.377 and P=0.357, respectively. Moreover, there is no significant variations in the effect of rice bran oil and olive oil consumption with P=0.568. Conclusion: MDA serum levels in DM type 2 subjects after administration of rice bran oil and olive oil decrease but not significantly different, also there is no significant variations effect between them.