scholarly journals Antioxidative and antiproliferative activities of ethanol extracts from pigmented giant embryo rice (Oryza sativaL. cv. Keunnunjami) before and after germination

2018 ◽  
Vol 12 (5) ◽  
pp. 365 ◽  
Author(s):  
Soo Im Chung ◽  
Sang Chul Lee ◽  
Seong Joon Yi ◽  
Mi Young Kang
Keyword(s):  
Before And After ◽  
Ethanol Extracts ◽  
Antiproliferative Activities ◽  
Giant Embryo

scholarly journals THE EFFECTS OF ETHANOL EXTRACTS OF Centella asiatica LEAF ON SERIAL SERUM BRAIN DERIVED NEUROTROPHIN FACTOR (BDNF) CONCENTRATION OF RATS (SPRAGUE DAWLEY) FOLLOWING CHRONIC STRESS

2015 ◽  
Vol 2 (1) ◽  
pp. 159 ◽  
Author(s):  
Dwi Cahyani Ratna Sari ◽  
Mawaddah Ar Rochmah
Keyword(s):  
Chronic Stress ◽  
Centella Asiatica ◽  
Male Rats ◽  
Control Group ◽  
Sprague Dawley ◽  
Electrical Stress ◽  
Significant Difference ◽  
Before And After ◽  
Ethanol Extracts ◽  
Serum Bdnf

<p>Centella asiatica is considered herbal plant for increasing memory performance. Brain-derived neurotrophin factor (BDNF) has a significant role in memory formation process, while stress causes memory impairment. Objective: This study aimed to investigate the effects of ethanol extracts of Centella asiatica leaf on serum BDNF concentration of rats that was taken serially before and after chronic electrical stress. Materials and Methods : Twenty male rats (Sprague Dawley) were divided into four groups: control/aquades group and groups treated with different doses (mg/kg) of Centella asiatica :150 (CA150), 300 (CA300) and 600 (CA600). Each rat underwent memory exercise for nine days before and after electrical stress and oral administration of ethanol extracts of Centella asiatica for twenty-eight days. Blood sampling was taken serially from rats’ tail for four times : (1) before memory exercise, (2) after memory exercise (before stress), (3) after chronic stress, and (4) after memory exercise (following chronic stress). Concentration of serum BDNF was assessed using ELISA. Results: There was no significant difference in serum BDNF concentration between groups in first and second serum sampling, which was prior to chronic stress and administration of different treatments. However, there was significant difference in third and fourth serum sampling between groups. Mean concentration of serum BDNF (ng/ml) in third and fourth sampling for control group, CA150, CA300, and CA600, respectively were 1.88+0.21 &amp;1.93+0.24; 2.29+0.13 &amp; 2.01+0.22; 2.29+0.08 &amp;1.86+0.11; 2.71+0.70 and 2.99+0.27 (p&lt;0.05). Conclusion: Ethanol extracts of Centella asiatica leaf increases serum BDNF concentration in rats after chronic stress. <br /><strong></strong></p><p><strong>Keywords</strong>: stress, memory, Centella asiatica, BDNF</p>

scholarly journals FORMULASI SEDIAAN GEL EKSTRAK ETANOL DAUN KALIANDRA (Calliandra surinamensis Benth) SEBAGAI ANTIBAKTERI

PHARMACON ◽  
2019 ◽  
Vol 8 (4) ◽  
pp. 801
Author(s):  
Yulita Ni Nyoman Tri Sukartiningsih ◽  
Hosea Jaya Edi ◽  
Jainer P. Siampa
Keyword(s):  
Staphylococcus Aureus ◽  
Antibacterial Activity ◽  
Physical Stability ◽  
Homogeneity Test ◽  
Adhesion Test ◽  
Cycling Test ◽  
Physical Evaluation ◽  
Before And After ◽  
Gel Preparation ◽  
Ethanol Extracts

ABSTRACT Kaliandra Leaf (Calliandra surinamensis Benth) contains flavonoid compounds, saponins and tannins which are able to inhibit the antibacterial activity. This study aims to test the antibacterial effectiveness of gel preparation of ethanol extracts of kaliandra leaf to obtain the greatest formula, and prove the Kaliandra leaf gel preparation has good physical stability. This study uses a laboratory experimental method. Gel formula is made as many as 5 formulas with variations in the concentration of 2%, 3%, 4%, 5%, and 6% of w : v. Kaliandra leaf extraction was carried out by maceration method using 96% ethanol. The antibacterial test of the ethanol extracts of Kaliandra leaf gel using the method of welling against Staphylococcus aureus bacteria produced a moderate inhibition of 7.0 ± 0.63 mm at a concentration of 6%. The physical evaluation of the preparation includes organoleptic test, homogeneity test, syneresis test, scatter power test, adhesion test, pH test, cycling test, and sterility test. All tests are carried out before and after the cycling test. The results of the study on the preparation fulfilled the physical evaluation requirements before and after the cycling test. It can be concluded that the concentration of 6% of ethanol extracts of Kaliandra leaves could be formulated as a gel preparation that is physically stable and has moderate antibacterial activity. Keywords: Kaliandra (Calliandra surinamensis Benth), Gel preparations, Staphylococcus aureus antibacterial.  ABSTRAK Daun Kaliandra (Calliandra surinamensus Benth) mengandung senyawa flavonoid, saponin dan tannin yang mampu menghambat aktivitas antibakteri. Penelitian ini bertujuan untuk menguji efektivitas antibakteri sediaan gel ekstrak etanol daun Kaliandra untuk mendapatkan formula terbesar, serta membuktikan sediaan gel daun Kaliandra mempunyai stabilitas fisik yang baik. Penelitian ini menggunakan metode ekperimental laboratorium. Formula sediaan gel dibuat sebanyak 5 formula dengan variasi konsentrasi 2%, 3%, 4%, 5%, dan 6% b/v. Ekstraksi daun Kaliandra dilakukan dengan metode maserasi menggunakan etanol 96%.  Penelitian uji antibakteri sediaan gel ekstrak etanol daun Kaliandra menggunakan metode sumuran pada bakteri staphylococcus aureus menghasilkan daya hambat yang sedang yaitu 7,0±0,63 mm pada konsentrasi 6%. Evaluasi fisik sediaan meliputi uji organoleptik, uji homogenitas, uji sineresis, uji daya sebar, uji daya lekat, uji pH, uji cycling test, dan uji sterilitas. Semua pengujian dilakukan sebelum dan sesudah cycling test. Hasil penelitian sediaan memenuhi persyaratan eveluasi fisik sebelum uji cycling test dan sesudah cycling test. Dapat disimpulkan pada kosentrasi 6% ekstrak etanol daun Kaliandra dapat diformulasi sebagai sediaan gel yang stabil secara fisik dan memiliki aktivitas antibakteri yang sedang. Kata kunci : Kaliandra (Calliandra surinamensis Benth), Sediaan Gel, Antibakteri Staphlococcous  aureus.

scholarly journals FORMULASI DAN EFEK ANTIBAKTERI MASKER PEEL-OFF EKSTRAK ETANOL DAUN KERSEN (Muntingia calabura L.) TERHADAP BAKTERI Staphlococcous epidermidis

PHARMACON ◽  
2019 ◽  
Vol 8 (3) ◽  
pp. 686
Author(s):  
Regita Daimunon ◽  
Paulina V. Y. Yamlean ◽  
Imam Jayanto
Keyword(s):  
Staphylococcus Epidermidis ◽  
Ethanol Extract ◽  
Homogeneity Test ◽  
Power Test ◽  
Cycling Test ◽  
Physical Evaluation ◽  
Before And After ◽  
Time Test ◽  
Ethanol Extracts ◽  
Muntingia Calabura

ABSTRACT Kersen leaf (Muntingia calabura L.) contains flavonoids, saponins and tannins, which could inhibit bacterial activity. This study aimed to formulate, evaluate, and to test the effectiveness of antibacterial preparations for the Kersen leaf ethanol extracts mask.  This study uses the experimental method by testing the parameters of the physical evaluation requirements for the masker. Physical evaluation of preparations included organoleptic test, homogeneity test, pH test, scattering power test, dry time test, sticky test and cycling test, all tests were carried out before and after cycling test. The results of the preparation study meet the requirements of physical evaluation before the cycling test but after the cycling test is is not in accordance to the requirements for the preparation of the peel-off mask. The antibacterial test of mask peel-off ethanol extract of Kersen's leaves on Staphylococcus epidermidis bacteria produced a moderate inhibition. So it can be concluded that the ethanol extracts of Kersen leaves at a concentration of 20%.  can be formulated as a peel-off mask that is physically stable and has moderate antibacterial activity.Keywords: Kersen, Peel-off mask, Antibacterial, Staphlococcous epidermidis ABSTRAK Daun Kersen (Muntingia calabura L.) mengandung senyawa flavonoid, saponin dan tannin yang mampu menghambat aktivitas bakteri.  Penelitian ini bertujuan untuk memformulasi, mengevaluasi, serta menguji efektivitas antibakteri sediaan masker peel-off ekstrak etanol daun Kersen. Penelitian ini menggunakan metode ekperimental dengan melakukan pengujian parameter persyaratan evaluasi fisik masker peel-off. Evaluasi fisik sediaan meliputi uji organoleptik, uji homogenitas, uji pH, uji daya sebar, uji waktu sediaan mengering, uji daya lekat dan uji cycling test semua pengujian dilakukan sebelum dan sesudah cycling test. Hasil penelitian sediaan memenuhi persyaratan eveluasi fisik sebelum uji cycling test namun setelahnya tidak sesuai dengan persyaratan sediaan masker peel-off. Penelitian uji antibakteri masker peel-off ekstrak etanol daun Kersen pada bakteri staphylococcus epidermidis menghasilkan daya hambat yang sedang. Dapat disimpulkan pada kosentrasi 20% ekstrak etanol daun Kersen dapat diformulasi sebagai sediaan masker peel-off yang stabil secara fisik dan memiliki aktivitas antibakteri yang sedang .Kata kunci : Kersen, Masker peel-off, Antibakteri, Staphlococcous  epidermidis

scholarly journals A Comprehensive Assessment of Bioactive Metabolites, Antioxidant and Antiproliferative Activities of Cyclocarya paliurus (Batal.) Iljinskaja Leaves

Forests ◽  
2019 ◽  
Vol 10 (8) ◽  
pp. 625 ◽  
Author(s):  
Mingming Zhou ◽  
Pei Chen ◽  
Yuan Lin ◽  
Shengzuo Fang ◽  
Xulan Shang
Keyword(s):  
Antioxidant Activity ◽  
High Performance ◽  
Comprehensive Evaluation ◽  
Natural Populations ◽  
Reducing Power ◽  
Cell Types ◽  
Bioactive Metabolites ◽  
Cyclocarya Paliurus ◽  
Ethanol Extracts ◽  
Antiproliferative Activities

Cyclocarya paliurus (Batal.) Iljinskaja is an indigenous and multifunction tree species in China, but it is mainly used in pharmaceutical and nutraceutical ingredients. To make a comprehensive evaluation on its bioactive metabolites, antioxidant and antitumor potentials of C. paliurus leaves, the leaf samples were collected from 15 geographic locations (natural populations) throughout its distribution areas. High-performance liquid chromatography (HPLC) and colorimetric methods were used to detect the contents of bioactive metabolites. The antioxidant activity was evaluated by 2,2′-diphenyl-1-picrylhydrazyl (DPPH), 2,2-azino-bis (3-ethylbenzothiazoline-6-sulfonic acid) (ABTS) and reducing power assays. The antiproliferative activity on different cancer cell types was evaluated by 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay. Contents of bioactive metabolites, and antioxidant and antiproliferative activities in the extracts were significantly affected by solvent and population. In most cases, the contents of flavonoids and triterpenoids, and the antioxidant and antiproliferative activities in the ethanol extracts were higher than the water extracts. The best scavenging capacity of DPPH (IC50 = 0.34 mg/mL) and ABTS (IC50 = 0.50 mg/mL) radical occurred in the ethanol extracts of S15 and S7 population respectively, while the strongest reducing power (EC50 = 0.71 mg/mL) was achieved in the ethanol extracts of S14 population. The antiproliferation effects of C. paliurus extracts on cancer cells varied with different cell types. The HeLa cell was the most sensitive to C. paliurus extracts, and their IC50 values of the ethanol extracts varied from 0.13 to 0.42 mg/mL among C. paliurus populations. Redundancy analysis showed that total polyphenol had the greatest contribution to the antioxidant activity, but total flavonoid was mostly responsible for the antiproliferation effects. These results would provide important scientific evidences not only for developing C. paliurus as a potent antioxidant and antitumor reagent, but also for obtaining the higher yield of bioactive compounds in the C. paliurus plantation.

scholarly journals FORMULASI DAN UJI ANTIBAKTERI GEL EKSTRAK ETANOL DAUN KEDONDONG (Spondias dulcis) TERHADAP BAKTERI Pseudomonas aeruginosa

PHARMACON ◽  
2020 ◽  
Vol 9 (1) ◽  
pp. 8
Author(s):  
Kevin Yosua Pakpahan ◽  
Paulina V. Y. Yamlean ◽  
Imam Jayanto
Keyword(s):  
Pseudomonas Aeruginosa ◽  
Ethanol Extract ◽  
Homogeneity Test ◽  
Cycling Test ◽  
Physical Evaluation ◽  
Before And After ◽  
Dispersion Test ◽  
Gel Preparation ◽  
Ethanol Extracts ◽  
Weak Antibacterial Activity

ABSTRACT Kedondong leaves (Spondias dulcis) contain flavonoid compounds, saponins and tannins that inhibit bacterial activity. This study aims to formulate, evaluate, and test the antibacterial effectiveness of the ethanol extracts gel of the Kedondong leaves (Spondias dulcis) at a concentration of 6%, 8%, 10%, respectively. This study uses an experimental method by testing the physical evaluation requirements of gel preparations. Physical evaluation of preparations includes organoleptic test, homogeneity test, pH test, dispersion test, adhesion test and cycling test, all tests are carried out before and after the cycling test. The results of the study on the gel dispersion test did not meet the physical evaluation requirements before the cycling test and after the cycling test there was a synergetic and did not meet the requirements. Antibacterial test of ethanol extracts gel of Kedondong leaves against Pseudomonas aeruginosa produced weak inhibitory properties. It can be concluded that the gel concentration of 6%, 8%, 10% of ethanol extract of Kedondong leaves cannot be formulated as a gel preparation because it is less physically stable and has weak antibacterial activity.  Keywords: Antibacterial, HPMC Gel, Kedondong (Spondias dulcis), Pseudomonas aeruginosa   ABSTRAK Daun Kedondong (Spondias dulcis) mengandung senyawa flavonoid, saponin dan tannin yang mampu menghambat aktivitas bakteri.  Penelitian ini bertujuan untuk memformulasi, mengevaluasi, serta menguji efektivitas antibakteri sediaan gel ekstrak etanol daun Kedondong (Spondias dulcis) pada kosentrasi 6%, 8%, 10%. Penelitian ini menggunakan metode ekperimental dengan melakukan pengujian parameter persyaratan evaluasi fisik sediaan gel. Evaluasi fisik sediaan meliputi uji organoleptik, uji homogenitas, uji pH, uji daya sebar, uji daya lekat dan uji cycling test semua pengujian dilakukan sebelum dan sesudah cycling test. Hasil penelitian pada uji daya sebar sediaan gel tidak memenuhi persyaratan eveluasi fisik sebelum uji cycling test dan setelah cycling test terjadi sineresis dan tidak memenuhi syarat. Penelitian uji antibakteri sediaan gel ekstrak etanol daun Kedondong pada bakteri Pseudomonas aeruginosa menghasilkan daya hambat yang lemah. Dapat disimpulkan pada gel kosentrasi 6%, 8%, 10% ekstrak etanol daun Kedondong tidak dapat diformulasi sebagai sediaan gel karena kurang stabil secara fisik dan memiliki aktivitas antibakteri yang lemah.  Kata kunci : Antibakteri, Gel HPMC, Kedondong (Spondias dulcis), Pseudomonas aeruginosa

Deformation Replication

1970 ◽  
Vol 28 ◽  
pp. 280-281
Author(s):  
J. Temple Black
Keyword(s):  
Cutting Speed ◽  
Machining Process ◽  
Depth Of Cut ◽  
Rake Face ◽  
Orthogonal Machining ◽  
Aluminum Chips ◽  
Before And After ◽  
Materials Used ◽  
Glass Knife ◽  
Very High

Tool materials used in ultramicrotomy are glass, developed by Latta and Hartmann (1) and diamond, introduced by Fernandez-Moran (2). While diamonds produce more good sections per knife edge than glass, they are expensive; require careful mounting and handling; and are time consuming to clean before and after usage, purchase from vendors (3-6 months waiting time), and regrind. Glass offers an easily accessible, inexpensive material ($0.04 per knife) with very high compressive strength (3) that can be employed in microtomy of metals (4) as well as biological materials. When the orthogonal machining process is being studied, glass offers additional advantages. Sections of metal or plastic can be dried down on the rake face, coated with Au-Pd, and examined directly in the SEM with no additional handling (5). Figure 1 shows aluminum chips microtomed with a 75° glass knife at a cutting speed of 1 mm/sec with a depth of cut of 1000 Å lying on the rake face of the knife.

The Clinical, Roentgenological and Morphological Effects of an Acute Exposure of Phosgene on the Lungs of Dogs

1971 ◽  
Vol 29 ◽  
pp. 236-237
Author(s):  
R. F. Bils ◽  
W. F. Diller ◽  
F. Huth
Keyword(s):  
Latent Period ◽  
Chemical Industry ◽  
Toxic Substance ◽  
Lung Edema ◽  
X Rays ◽  
Beagle Dogs ◽  
Male And Female ◽  
Morphological Alterations ◽  
Before And After ◽  
Electron Microscopes

Phosgene still plays an important role as a toxic substance in the chemical industry. Thiess (1968) recently reported observations on numerous cases of phosgene poisoning. A serious difficulty in the clinical handling of phosgene poisoning cases is a relatively long latent period, up to 12 hours, with no obvious signs of severity. At about 12 hours heavy lung edema appears suddenly, however changes can be seen in routine X-rays taken after only a few hours' exposure (Diller et al., 1969). This study was undertaken to correlate these early changes seen by the roengenologist with morphological alterations in the lungs seen in the'light and electron microscopes.Forty-two adult male and female Beagle dogs were selected for these exposure experiments. Treated animals were exposed to 94.5-107-5 ppm phosgene for 10 min. in a 15 m3 chamber. Roentgenograms were made of the thorax of each animal before and after exposure, up to 24 hrs.

Ultrastructure of Melanin Formation in Curvularia sp., Alternaria sp., and Drechslera Sorokiniana

1977 ◽  
Vol 35 ◽  
pp. 398-399
Author(s):  
M. H. Wheeler ◽  
W. J. Tolmsoff ◽  
A. A. Bell
Keyword(s):  
Potassium Phosphate ◽  
Thielaviopsis Basicola ◽  
Wild Type ◽  
Potassium Phosphate Buffer ◽  
Transmission Microscopy ◽  
Electron Transmission ◽  
Melanin Formation ◽  
Before And After ◽  
Alternaria Sp ◽  
Electron Transmission Microscopy

(+)-Scytalone [3,4-dihydro-3,6,8-trihydroxy-l-(2Hj-naphthalenone] and 1,8-di- hydroxynaphthalene (DHN) have been proposed as intermediates of melanin synthesis in the fungi Verticillium dahliae (1, 2, 3, 4) and Thielaviopsis basicola (4, 5). Scytalone is enzymatically dehydrated by V. dahliae to 1,3,8-trihydroxynaphthalene which is then reduced to (-)-vermelone [(-)-3,4- dihydro-3,8-dihydroxy-1(2H)-naphthalenone]. Vermelone is subsequently dehydrated to DHN which is enzymatically polymerized to melanin.Melanin formation in Curvularia sp., Alternaria sp., and Drechslera soro- kiniana was examined by light and electron-transmission microscopy. Wild-type isolates of each fungus were compared with albino mutants before and after treatment with 1 mM scytalone or 0.1 mM DHN in 50 mM potassium phosphate buffer, pH 7.0. Both chemicals were converted to dark pigments in the walls of hyphae and conidia of the albino mutants. The darkened cells were similar in appearance to corresponding cells of the wild types under the light microscope.

Evaluation of Freezing Methods by Low Temperature X-Ray Diffraction

1977 ◽  
Vol 35 ◽  
pp. 330-333
Author(s):  
T. Gulik-Krzywicki ◽  
M.J. Costello
Keyword(s):  
Biological Materials ◽  
Molecular Organization ◽  
X Ray Diffraction ◽  
Glass Capillary ◽  
X Ray ◽  
Rate Dependent ◽  
Before And After ◽  
Freeze Etching ◽  
Diffraction Patterns ◽  
Set Up

Freeze-etching electron microscopy is currently one of the best methods for studying molecular organization of biological materials. Its application, however, is still limited by our imprecise knowledge about the perturbations of the original organization which may occur during quenching and fracturing of the samples and during the replication of fractured surfaces. Although it is well known that the preservation of the molecular organization of biological materials is critically dependent on the rate of freezing of the samples, little information is presently available concerning the nature and the extent of freezing-rate dependent perturbations of the original organizations. In order to obtain this information, we have developed a method based on the comparison of x-ray diffraction patterns of samples before and after freezing, prior to fracturing and replication.Our experimental set-up is shown in Fig. 1. The sample to be quenched is placed on its holder which is then mounted on a small metal holder (O) fixed on a glass capillary (p), whose position is controlled by a micromanipulator.

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