KARAKTERISTIK KIMIA DAN UJI AKTIVITAS ANTIOKSIDAN RUMPUT LAUT (E. spinosum) YANG DIPEROLEH DARI KECAMATAN WANGI-WANGI SELATAN DAN KECAMATAN KALEDUPA SELATAN

2021 ◽  
Vol 4 (1) ◽  
pp. 11
Author(s):  
Lifendro Lifendro ◽  
Haslianti Haslianti ◽  
Nur Asyik
Keyword(s):  
Water Content ◽  
Descriptive Analysis ◽  
High Water ◽  
High Water Content ◽  
General Description ◽  
High Carbohydrate ◽  
Activity Test ◽  
Ic50 Value ◽  
Carbohydrate Levels ◽  
Keywords Antioxidants

ABSTRACT         The aim of this study was to determine the proximate content (water content, carbohydrate levels), phytochemicals (alkaloids, flavonoids, saponins, steroids, terpenoids), and antioxidants. Data analysis in this study used descriptive analysis to provide a general description of the data. The results of this study aim to determine the content of proximate (water content, carbohydrate levels), phytochemicals (alkaloids, flavonoids, saponins, steroids, terpenoids), and antioxidants. Proximate test on E. spinosum seaweed has a difference, namely water content with sample code P1 = 41.83% and P2 = 49.19. High water content is in the sample code P2, while the carbohydrate content with sample code P1 = 22.20 and P2 = 17.64. High carbohydrate levels are found in the sample code P1. Phytochemical tests on E. spinosum seaweed with codes P1 and P2 contained flavonoids, saponins, and triterpenoids but there were no alkaloids and steroids. The antioxidant activity test on E. spinosum seaweed in both samples was very weak with sample code P1 having IC50 value = 223.90 while IC50 value at P2 = 222.34.Keywords: Antioxidants, Eucheuma spinosum, Phytochemicals and ProximateABSTRAKPeneletian ini bertujuan untuk mengetahui kandungan proksimat (kadar air, kadar karbohidrat), fitokimia (alkaloid, flavonoid, saponin, steroid, terpenoid) dan antioksidan. Analisis data penelitian ini menggunakan analisis deskriptif untuk memberikan gambaran umum tentang data. Hasil uji proksimat pada rumput laut E. spinosum memiliki perbedaan yaitu kadar air dengan kode sampel P1 = 41.83% dan P2 =49.19. Kadar air  tinggi terdapat pada kode sampel P2, sedangkan kadar karbohidrat dengan kode sampel P1 = 22.20 dan P2 = 17.64. Kadar karbohidrat yang tinggi terdapat pada kode sampel P1. Uji fitokimia pada rumput laut E. spinosum dengan kode sampe P1 dan P2  terdapat flavonoid, saponin dan terpenoid namun tidak terdapat alkaloid dan steroid. Uji aktivitas antioksidan pada rumput laut E. spinosum pada kedua sampel sangat lemah dengan kode sampel P1 memiliki nilai IC50 = 223,90 sedangkan nilai IC50 pada P2 = 222,34. Kata kunci: Antioksidan, Eucheuma spinosum, Fitokimia dan Proksimat.

KARAKTERISTIK KIMIA DAN UJI AKTIVITAS ANTIOKSIDAN RUMPUT LAUT (Sargassum sp.) YANG DIPEROLEH DARI KECAMATAN WANGI-WANGI DAN KECAMATAN WANGI-WANGI SELATAN KABUPATEN WAKATOBI

2021 ◽  
Vol 4 (1) ◽  
pp. 44
Author(s):  
La Ode Sarlin ◽  
Haslianti Haslianti ◽  
Sri Rejeki
Keyword(s):  
Antioxidant Activity ◽  
Moisture Content ◽  
Water Content ◽  
Descriptive Analysis ◽  
High Water ◽  
Carbohydrate Content ◽  
High Water Content ◽  
Test Results ◽  
A Value ◽  
Keywords Antioxidants

ABSTRACT         The aim of this study was to determine the proximate content (moisture content, carbohydrate content), phytochemicals (alkaloids, flavonoids, saponins, steroids, terpenoids) and antioxidants. This research used descriptive analysis. Proximate test results on Sargassum sp. P1 = 35.43% and P2 = 34.42% High water content is found in sample code P1, while carbohydrates P1 = 11.85. and P2 = 22.05. Phytochemical test of seaweed Sargassum sp. there are flavonoids, saponins, and terpenoids but there are no alkaloids and steroids. Antioxidant activity of seaweed Sargassum sp. P1 has a value of IC50 = 153.37 while the value of IC50 is at P2 = 162.32. Keywords: Antioxidants, Phytochemicals Sargassum sp, and Proximate.ABSTRAKTujuan penelitian ini untuk mengetahui karakterisasi kimia aktivitas antioksidan rumput laut Sargassum sp. yang diperoleh dari Kecamatan Wangi-Wangi dan Kecamatan Wangi-Wangi selatan Kabupaten Wakatobi.  Penelitian ini menggunakan analisis deskriptif. Hasil Uji proksimat pada rumput laut Sargassum sp. yaitu : P1 = 35,43% dan P2 = 34,42% Kadar air yang tinggi terdapat pada kode sampel P1, Sedangkan karbohidrat dengan kode sampel P1= 11,85. dan P2 = 22,05. Uji fitokimia rumput laut Sargassum sp. terdapat flavonoid, saponin dan terpenoid namun tidak terdapat alkaloid dan steroid. Aktivitas antioksidan rumput laut Sargassum sp. P1 memiliki nilai IC50 = 153,37, sedangkan nilai IC50 pada P2 = 162,32.Kata kunci: Antioksidan, Fitokimia Sargassum sp, dan Proksimat.

scholarly journals OPTIMASI PEMBUATAN MI DARI TEPUNG JAGUNG PRAGELATINISASI

2019 ◽  
Vol 16 (2) ◽  
pp. 99
Author(s):  
Nur Aini ◽  
Budi Sustriawan ◽  
NFN Masrukhi
Keyword(s):  
Water Content ◽  
High Water ◽  
Cooking Time ◽  
High Water Content ◽  
Total Protein Content ◽  
Gelatinization Temperature ◽  
Corn Flour ◽  
Modification Method ◽  
Carbohydrate Levels ◽  
Optimal Formula

<p>Pragelatinisasi merupakan metode modifikasi yang dapat diterapkan untuk tepung jagung sehingga diharapkan dapat mempermudah pada proses pembuatan mi. Suhu gelatinisasi berbeda-beda bagi tiap jenis pati, dan untuk mencapai suju gelatinisasi tersebut tiap bahan memerlukan waktu yang berbeda. Setiap bahan juga membutuhkan penambhan air yang tepat agar dapat mengalam gelatinisasi. Penelitian ini bertujuan untuk (1) mempelajari kombinasi wkatu dan suhu pemasakan serta jumlah air yang ditambhakan untuk suspensi tepung jagung pragelatinisasi yang mempunyai respon maksimum terhadap kadar karbohidrat, kadar pengembangan dan tingkat penerimaan mi jagung; (2) mengetahui karakter fisiokimia dan organoleptik mi jagung pada formula optimal. Hasil penelitian menunjukkan bahwa ondisi pragelatinisasi optimal pada tepung jagung untuk pembuatan mi adalah selama pemasakan 7 menit waktu pemasakan, suhu 71C dan volume air 13% b/v. Mi jagung formula optimal memiliki kadar air 62,61%; kadar abu 0,322% bb; kadar lemak 1,37% bb; kadar protein total 4,18% bb; kadar karbohidrat 31,51% bb; daya pengembangan mi 16,67%; warna 2,5 9kuning keputihan); aroma 3,9 (tidak khas tepung); tekstur (2,5) (agak kenyal); rasa 2,6 (agak gurih); dan tingkat kesukaan keseluruhan 2,8 (suka). mi jagung ini masih memerlukan perbaikan proses untuk menurunkan kadar air yang tinggi, supaya memenuhi SNI 01-2987-1992.</p><p> </p><p>Pragelatinization is a modification method that can be applied for corn flour so that it can simplify the application for noodles. The temperature of gelatinization varies for each type of starch, and to reach the gelatinization temperature each ingredient needs different time. Each ingredient also needs the precise amount of water to get gelatinization. The object of this research are (1) to study the combination of cooking time and temperature and the amount of water needed for the suspension of pragelatinized corn flour which has a maximum response to carbohydrate levels, swelling power and preference of corn noodles; (2) to study the physicochemical and sensory characters of corn noodles in the optimal formula. The results showed that the optimal pregelatinization condition in corn flour for the production of noodles was during 7 minutes cooking time, temperature 71<sup>o</sup>C and volume of water 13% b / v. The optimal formula for corn noodles has a water content of 62.61%; ash content 0.322% bb; fat content 1.37% bb; total protein content 4.18% bb; carbohydrate levels 31.51% bb; power of development of noodles 16.67%; color 2.5 (whitish yellow); aroma 3,9 (not typical flour); texture 2.5 (slightly springy); flavor 2,6 (rather umami); and preference level 2.8. The corn noodles still need to improve the process to reduce the high water content so that they have not fulfilled Indonesian Nasional Standard 01-2987-1992.</p>

Hydrogels as Antibacterial Biomaterials

2018 ◽  
Vol 24 (8) ◽  
pp. 843-854 ◽  
Author(s):  
Weiguo Xu ◽  
Shujun Dong ◽  
Yuping Han ◽  
Shuqiang Li ◽  
Yang Liu
Keyword(s):  
Mechanical Properties ◽  
Drug Delivery ◽  
Tissue Engineering ◽  
Water Content ◽  
Oxygen Permeability ◽  
Structural Diversity ◽  
High Water ◽  
Clinical Applications ◽  
High Water Content ◽  
Biomedical Field

Hydrogels, as a class of materials for tissue engineering and drug delivery, have high water content and solid-like mechanical properties. Currently, hydrogels with an antibacterial function are a research hotspot in biomedical field. Many advanced antibacterial hydrogels have been developed, each possessing unique qualities, namely high water swellability, high oxygen permeability, improved biocompatibility, ease of loading and releasing drugs and structural diversity. In this article, an overview is provided on the preparation and applications of various antibacterial hydrogels. Furthermore, the prospects in biomedical researches and clinical applications are predicted.

Microwave-Induced Thermoacoustic Imaging for Embedded Explosives Detection in High-Water Content Medium

2019 ◽  
Vol 67 (7) ◽  
pp. 4803-4810 ◽  
Author(s):  
Xiong Wang ◽  
Tao Qin ◽  
Yexian Qin ◽  
Ahmed H. Abdelrahman ◽  
Russell S. Witte ◽  
...  
Keyword(s):  
Water Content ◽  
High Water ◽  
Explosives Detection ◽  
High Water Content ◽  
Thermoacoustic Imaging

scholarly journals Deep mantle melting, global water circulation and its implications for the stability of the ocean mass

2020 ◽  
Vol 7 (1) ◽  
Author(s):  
Shun-ichiro Karato ◽  
Bijaya Karki ◽  
Jeffrey Park
Keyword(s):  
Phase Transformation ◽  
Water Content ◽  
Sea Level ◽  
High Water ◽  
Water Circulation ◽  
Mantle Melting ◽  
High Water Content ◽  
Mineral Physics ◽  
Deep Mantle ◽  
Global Water

AbstractOceans on Earth are present as a result of dynamic equilibrium between degassing and regassing through the interaction with Earth’s interior. We review mineral physics, geophysical, and geochemical studies related to the global water circulation and conclude that the water content has a peak in the mantle transition zone (MTZ) with a value of 0.1–1 wt% (with large regional variations). When water-rich MTZ materials are transported out of the MTZ, partial melting occurs. Vertical direction of melt migration is determined by the density contrast between the melts and coexisting minerals. Because a density change associated with a phase transformation occurs sharply for a solid but more gradually for a melt, melts formed above the phase transformation depth are generally heavier than solids, whereas melts formed below the transformation depth are lighter than solids. Consequently, hydrous melts formed either above or below the MTZ return to the MTZ, maintaining its high water content. However, the MTZ water content cannot increase without limit. The melt-solid density contrast above the 410 km depends on the temperature. In cooler regions, melting will occur only in the presence of very water-rich materials. Melts produced in these regions have high water content and hence can be buoyant above the 410 km, removing water from the MTZ. Consequently, cooler regions of melting act as a water valve to maintain the water content of the MTZ near its threshold level (~ 0.1–1.0 wt%). Mass-balance considerations explain the observed near-constant sea-level despite large fluctuations over Earth history. Observations suggesting deep-mantle melting are reviewed including the presence of low-velocity anomalies just above and below the MTZ and geochemical evidence for hydrous melts formed in the MTZ. However, the interpretation of long-term sea-level change and the role of deep mantle melting in the global water circulation are non-unique and alternative models are reviewed. Possible future directions of studies on the global water circulation are proposed including geodynamic modeling, mineral physics and observational studies, and studies integrating results from different disciplines.

scholarly journals Torrefaction of Woody and Agricultural Biomass: Influence of the Presence of Water Vapor in the Gaseous Atmosphere

Processes ◽  
2020 ◽  
Vol 9 (1) ◽  
pp. 30
Author(s):  
María González Martínez ◽  
Estéban Hélias ◽  
Gilles Ratel ◽  
Sébastien Thiéry ◽  
Thierry Melkior
Keyword(s):  
Water Vapor ◽  
Water Content ◽  
Wheat Straw ◽  
Beech Wood ◽  
High Water ◽  
High Water Content ◽  
Biomass Degradation ◽  
Moist Atmosphere ◽  
Thermochemical Transformation ◽  
Degradation Reactions

Biomass preheating in torrefaction at an industrial scale is possible through a direct contact with the hot gases released. However, their high water-content implies introducing moisture (around 20% v/v) in the torrefaction atmosphere, which may impact biomass thermochemical transformation. In this work, this situation was investigated for wheat straw, beech wood and pine forest residue in torrefaction in two complementary experimental devices. Firstly, experiments in chemical regime carried out in a thermogravimetric analyzer (TGA) showed that biomass degradation started from lower temperatures and was faster under a moist atmosphere (20% v/v water content) for all biomass samples. This suggests that moisture might promote biomass components’ degradation reactions from lower temperatures than those observed under a dry atmosphere. Furthermore, biomass inorganic composition might play a role in the extent of biomass degradation in torrefaction in the presence of moisture. Secondly, torrefaction experiments on a lab-scale device made possible to assess the influence of temperature and residence time under dry and 100% moist atmosphere. In this case, the difference in solid mass loss between dry and moist torrefaction was only significant for wheat straw. Globally, an effect of water vapor on biomass transformation through torrefaction was observed (maximum 10%db), which appeared to be dependent on the biomass type and composition.

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