scholarly journals Physical, Chemical, and Microbiological Characteristics of Ronto During Storage

2016 ◽  
Vol 19 (3) ◽  
pp. 348 ◽  
Author(s):  
Rita Khairina ◽  
Muhammad Nur Cahyanto ◽  
Tyas Utami ◽  
Sri Rahardjo
Keyword(s):  
Low Temperature ◽  
Room Temperature ◽  
Total Volatile ◽  
Cold Temperatures ◽  
Closed Container ◽  
Microbial Counts ◽  
Physical Chemical ◽  
Microbiological Characteristics

The purpose of this study was to determine the physical, chemical, and microbiological changes of ronto during storage at room and cold temperatures. Ronto was prepared by mixing fresh shrimp, salt, and rice with a ratio of 7 : 1 : 2 and fermented in a closed container for 14 days. Ronto produced was stored at room and cold (5o C) temperatures. Samples were withdrawn every 4 weeks and analyzed for its physical, chemical, and microbiological characteristics. The characteristic changes of ronto stored at low temperature were generally slower than those at room temperature. The changes in colour, viscosity, acidity, total volatile bases, and microbial counts were lower in ronto kept at 5o C compared to those in ronto kept at room temperature. The colour of ronto stored at low temperature remained red after 20 weeks, whereas the colour of ronto kept at room temperature turned brownish after 20 weeks.

scholarly journals Physical, Chemical, and Microbiological Characteristics of Ronto During Storage

2017 ◽  
Vol 19 (3) ◽  
pp. 348
Author(s):  
Rita Khairina ◽  
Muhammad Nur Cahyanto ◽  
Tyas Utami ◽  
Sri Rahardjo
Keyword(s):  
Low Temperature ◽  
Room Temperature ◽  
Total Volatile ◽  
Cold Temperatures ◽  
Closed Container ◽  
Microbial Counts ◽  
Physical Chemical ◽  
Microbiological Characteristics

<p>Abstract<br />The purpose of this study was to determine the physical, chemical, and microbiological changes of ronto during storage at room and cold temperatures. Ronto was prepared by mixing fresh shrimp, salt, and rice with a ratio of 7 : 1 : 2 and fermented in a closed container for 14 days. Ronto produced was stored at room and cold (5oC) temperatures. Samples were withdrawn every 4 weeks and analyzed for its physical, chemical, and microbiological characteristics. The characteristic changes of ronto stored at low temperature were generally slower than those at room temperature. The changes in colour, viscosity, acidity, total volatile bases, and microbial counts were lower in ronto kept at 5oC compared to those in ronto kept at room temperature. The colour of ronto stored at low temperature remained red after 20 weeks, whereas the colour of ronto kept at room temperature turned brownish after 20 weeks.</p>

scholarly journals Characteristics of Guava (Psidium guajava L.) Treated With Ozonation During Ambient Storage

2017 ◽  
Vol 2 (6) ◽  
pp. 448
Author(s):  
Imas Siti Setiasih ◽  
Tita Rialita ◽  
Debby M. Sumanti ◽  
In-in Hanidah
Keyword(s):  
Vitamin C ◽  
Moisture Content ◽  
Pesticide Residue ◽  
Room Temperature ◽  
Psidium Guajava ◽  
Ozone Treatment ◽  
Physical Chemical ◽  
Microbiological Characteristics ◽  
Ambient Storage ◽  
Ozonation Process

Crystal guava (Psidiumguajava L.) is a kind of fruit which easily damaged due to various factors.  Without proper treatment, crystal guava will  had  physical  damages.  The  aims  of  this study were to  determine  the  differences  in  physical, chemical,  microbiological  characteristics, and pesticide residue  between  crystal guava treated and untreated in ozone.  Ozonation  process was conducted by using ozonizer TIP-01 at the  concentration of 1.1 ppm for 5 minutes, and stored at room temperature (25± 2 0C) observed for 6 days with 2 replicates.  The explanatory methods was employed followed  by t-test.  The  characteristics  observed  were  color lightness,  hardness,  vitamin  C  content,  moisture  content,  totally  microorganism, and  pesticide residue.   The  results  showed  that after storage  for  6  days  at   room  temperature,  the  ozone  treatment  reduced  the lightness, hardness, vitamin C content, totally   microorganism,  and  pesticide residue,  while  moisture  content  increased.Keywords:  guava; ozone;  ambient storage

scholarly journals Turbinaria conoides Extract Increases the Storability of Red Nile Fillet at Cold Temperatures

2019 ◽  
Vol 21 (1) ◽  
pp. 1
Author(s):  
Amir Husni ◽  
Latif Sahubawa ◽  
Imam Arda Perdana
Keyword(s):  
Low Temperature ◽  
Shelf Life ◽  
Antibacterial Agents ◽  
Plate Count ◽  
Total Volatile ◽  
Cold Temperatures ◽  
Red Tilapia ◽  
Extract Solution ◽  
Turbinaria Conoides

The aim of the research was to assess the effect of Turbinaria conoides extract as a natural antibacterial agents on shelf life of red tilapia fillet at low temperature. The fresh red tilapia fillet soaked with a Turbinaria conoides extract solution for 30 minutes at various concentration of 0.0%; 0.5%: 1.0%; 1.5% and 2.0%, than stored at low temperature (4°C) for 12 days with four days interval observation, repeteadly. The parameter observed wereTotal Plate Count (TPC), Total Volatile Base (TVB), pH and scoring. The result showed that Turbinaria conoides extract able to maintain shelf life of red tilapia fillet at low temperature up to 12 days based on the content of TPC and TVB. Turbinaria conoides extract can maintain the score of appearance and texture of red tilapia up to 8 days. The treatment 1.5% of Turbinaria conoides extract was the best treatment in maintaining shelf life of red tilapia fillet at low temperature based on the parameters of TPC, TVB, appearance and texture.

Survival of mouse blastocysts after low-temperature preservation under high pressure

2004 ◽  
Vol 52 (4) ◽  
pp. 479-487 ◽  
Author(s):  
Cs. Pribenszky ◽  
M. Molnár ◽  
S. Cseh ◽  
L. Solti
Keyword(s):  
Phase Transition ◽  
Hydrostatic Pressure ◽  
Low Temperature ◽  
High Hydrostatic Pressure ◽  
Room Temperature ◽  
Freezing Point ◽  
Significant Loss ◽  
Embryo Cryopreservation ◽  
Subzero Temperatures ◽  
Survival Capacity

Cryoinjuries are almost inevitable during the freezing of embryos. The present study examines the possibility of using high hydrostatic pressure to reduce substantially the freezing point of the embryo-holding solution, in order to preserve embryos at subzero temperatures, thus avoiding all the disadvantages of freezing. The pressure of 210 MPa lowers the phase transition temperature of water to -21°C. According to the results of this study, embryos can survive in high hydrostatic pressure environment at room temperature; the time embryos spend under pressure without significant loss in their survival could be lengthened by gradual decompression. Pressurisation at 0°C significantly reduced the survival capacity of the embryos; gradual decompression had no beneficial effect on survival at that stage. Based on the findings, the use of the phenomena is not applicable in this form, since pressure and low temperature together proved to be lethal to the embryos in these experiments. The application of hydrostatic pressure in embryo cryopreservation requires more detailed research, although the experience gained in this study can be applied usefully in different circumstances.

Photophysical properties of N719 and Z907 dyes, benchmark sensitizers for dye-sensitized solar cells, at room and low temperature

2021 ◽  
Vol 23 (10) ◽  
pp. 6182-6189
Author(s):  
Dariusz M. Niedzwiedzki
Keyword(s):  
Solar Cells ◽  
Low Temperature ◽  
Optical Spectroscopy ◽  
Room Temperature ◽  
Photophysical Properties ◽  
Dye Sensitized Solar Cells ◽  
Time Resolved ◽  
Dye Sensitized ◽  
Sensitized Solar Cells

Photophysical properties of N719 and Z907, benchmark Ru-dyes used as sensitizers in dye-sensitized solar cells, were studied by static and time-resolved optical spectroscopy at room temperature and 160 K.

Transition Insulator-Metal and Antiferromagnetic-Paramagnetic Cu Doped in La0.47Ca0.53MnO3

2015 ◽  
Vol 1123 ◽  
pp. 73-77 ◽  
Author(s):  
Yohanes Edi Gunanto ◽  
K. Sinaga ◽  
B. Kurniawan ◽  
S. Poertadji ◽  
H. Tanaka ◽  
...  
Keyword(s):  
High Resolution ◽  
Low Temperature ◽  
Magnetic Structure ◽  
Room Temperature ◽  
Paramagnetic Phase ◽  
Perovskite Manganites ◽  
Antiferromagnetic Phase ◽  
Temperature Transition ◽  
Cu Doping ◽  
Metal State

The study of the perovskite manganites La0.47Ca0.53Mn1-xCuxO3 with x = 0, 0.06, 0.09, and 0.13 has been done. The magnetic structure was determined using high-resolution neutron scattering at room temperature and low temperature. All samples were paramagnetic at room temperature and antiferromagnetic at low temperature. Using the SQUID Quantum Design, the samples showed that the doping of the insulating antiferromagnetic phase La0.47Ca0.53MnO3 with Cu doping resulted in the temperature transition from an insulator to metal state, and an antiferromagnetic to paramagnetic phase. The temperature transition from an insulator to metal state ranged from 23 to 100 K and from 200 to 230 K for the transition from an antiferromagnetic to paramagnetic phase.

Molecule-Based Magnets—An Overview

MRS Bulletin ◽  
2000 ◽  
Vol 25 (11) ◽  
pp. 21-30 ◽  
Author(s):  
Joel S. Miller ◽  
Arthur J. Epstein
Keyword(s):  
Low Temperature ◽  
Vapor Deposition ◽  
Room Temperature ◽  
Chemical Vapor ◽  
Magnetic Ordering ◽  
Low Density ◽  
Materials Properties ◽  
The Common ◽  
New Processing ◽  
Very High

Molecule-based magnets are a broad, emerging class of magnetic materials that expand the materials properties typically associated with magnets to include low density, transparency, electrical insulation, and low-temperature fabrication, as well as combine magnetic ordering with other properties such as photoresponsiveness. Essentially all of the common magnetic phenomena associated with conventional transition-metal and rare-earth-based magnets can be found in molecule-based magnets. Although discovered less than two decades ago, magnets with ordering temperatures exceeding room temperature, very high (∼27.0 kOe or 2.16 MA/m) and very low (several Oe or less) coercivities, and substantial remanent and saturation magnetizations have been achieved. In addition, exotic phenomena including photoresponsiveness have been reported. The advent of molecule-based magnets offers new processing opportunities. For example, thin-film magnets can be prepared by means of low-temperature chemical vapor deposition and electrodeposition methods.

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