Kelimpahan Kodok Jam Pasir Leptophryne borbonica di Sepanjang Aliran Sungai Cisuren, Bodogol, Taman Nasional Gunung Gede Pangrango

Jurnal BIOMA ◽  
2014 ◽  
Vol 10 (2) ◽  
pp. 11
Author(s):  
Dhany Ardiansyah ◽  
Arini Karunia ◽  
Talita Auliandina ◽  
Dien Anugerah Putri ◽  
Mohamad Isnin Noer
Keyword(s):  
Abiotic Factors ◽  
Habitat Characteristics ◽  
Chemical Characteristics ◽  
Physical Factors ◽  
Weak Correlation ◽  
Physical Processes ◽  
Natural Factors ◽  
Abundance And Distribution ◽  
Physical And Chemical ◽  
Number Of Individuals

There is high spatial variation in physical and chemical characteristics both within and between streams, some of which has been linked to natural factors. Stream characteristics affect many biological and physical processes. Leptophryne borbonica is stream-dependent toad that spend their life completely in or around stream. The purpose of this study was to determine the effect of habitat characteristics on abundance of Leptophryne borbonica in Bodogol, Sukabumi, West Java. Survey was conducted to obtain data on 27 until 29 June 2013 along Cisuren stream of Bodogol. Parameters that used in this study were conductivity, temperature, humidity, and salinity. The findings showed that all physical factors of stream have weak correlation with the abundance of Leptophryne borbonica. Abiotic factors that forming an ecosystem could affect the abundance and distribution of a amphibians species, because amphibians are sensitive to environmental change. Our result suggested that chemical characteristics along this stream were within the range of fundamental niche of Leptophryne borbonica. However, the slightly different in the number of individuals obtained among plots indicated that there were other factors that may be at play.

Characterization of defects in tabular silver halide grains

1990 ◽  
Vol 48 (4) ◽  
pp. 1046-1047
Author(s):  
C. Goessens ◽  
D. Schryvers ◽  
J. Van Landuyt ◽  
A. Verbeeck ◽  
R. De Keyzer
Keyword(s):  
Radiation Damage ◽  
Silver Halide ◽  
Chemical Characteristics ◽  
X Ray ◽  
Free Region ◽  
Central Defect ◽  
Crystallographic Defects ◽  
Physical And Chemical ◽  
Two Sides

Silver halide grains (AgX, X=Cl,Br,I) are commonly recognized as important entities in photographic applications. Depending on the preparation specifications one can grow cubic, octahedral, tabular a.o. morphologies, each with its own physical and chemical characteristics. In the present study crystallographic defects introduced by the mixing of 5-20% iodide in a growing AgBr tabular grain are investigated. X-ray diffractometry reveals the existence of a homogeneous Ag(Br1-xIx) region, expected to be formed around the AgBr kernel. In fig. 1 a two-beam BF image, taken at T≈100 K to diminish radiation damage, of a triangular tabular grain is presented, clearly showing defect contrast fringes along four of the six directions; the remaining two sides show similar contrast under relevant diffraction conditions. The width of the central defect free region corresponds with the pure AgBr kernel grown before the mixing with I. The thickness of a given grain lies between 0.15 and 0.3 μm: as indicated in fig. 2 triangular (resp. hexagonal) grains exhibit an uneven (resp. even) number of twin interfaces (i.e., between + and - twin variants) parallel with the (111) surfaces. The thickness of the grains and the existence of the twin variants was confirmed from CTEM images of perpendicular cuts.

Study of Structural, Physical and Chemical Characteristics of Marshmallow Without Gelatin

Food Industry ◽  
2018 ◽  
Vol 3 (4) ◽  
Author(s):  
Nataliia V. Nepovinnykh ◽  
Yuri A. Kodatsky ◽  
Oksana N. Klyukina ◽  
Nataliia M. Ptichkin ◽  
Samira Yeganehzad
Keyword(s):  
Chemical Characteristics ◽  
Physical And Chemical Characteristics ◽  
Physical And Chemical

Effects of Chlormequat-Uniconazole 30% Micro-Emulsion on Stem Physical and Chemical Characteristics of Rice

2013 ◽  
Vol 39 (6) ◽  
pp. 1089
Author(s):  
Qian ZHANG ◽  
Ming-Cai ZHANG ◽  
Hai-Yan ZHANG ◽  
Wei-Ming TAN ◽  
Zhao-Hu LI ◽  
...  
Keyword(s):  
Chemical Characteristics ◽  
Physical And Chemical Characteristics ◽  
Micro Emulsion ◽  
Physical And Chemical

Physical and Chemical Characteristics of Meats of the Indonesian Indigenous Crossbred Chickens Fed Fermented Mixture of Papaya (Carica papaya L.) Leaf and Seed Meal

2020 ◽  
Keyword(s):  
Crude Protein ◽  
Control Diet ◽  
Dietary Treatment ◽  
Seed Meal ◽  
Chemical Characteristics ◽  
Breast Meat ◽  
Ph Values ◽  
Physical And Chemical Characteristics ◽  
Dietary Treatments ◽  
Physical And Chemical

The objective of this present study was to investigate the effect of feeding fermented mixture of papaya leaf and seed meal (FERM) on the physical and chemical characteristics of meats of the Indonesian indigenous crossbred chicken (IICC). The study was carried out with 300 day-old IICC. The chicks were randomly distributed to five treatment groups, i.e., CONT (control diet based on corn-soybean- diet), FERMA (diet containing 1% FERM), FERMB (2.5% FERM), FERMC (5% FERM) and FERMD (7.5% FERM). Each treatment group consisted of 6 replicates with 10 IICC in each. At week 8, one chick from each replicate was randomly taken and slaughtered. After being de-feathered and eviscerated, samples from breast and thigh meats were obtained. Results showed that the increased levels of FERM was followed by the increased (P<0.05) pH values, moisture and crude protein content of breast meats of the IICC. Dietary incorporation of FERM especially at the level of 2.5% increased (P<0.05) the content of fat in the breast meat of IICC, while further increased levels of FERM did not alter (P>0.05) the fat content of the IICC breast meat. Dietary treatment did not have any effect (P>0.05) on the lightness (L*) values of breast meat of the IICC. The redness (a*) values were higher (P<0.05) in FERMD breast meat than other. FERM diet resulted in lower (P<0.05) yellowness (b*) values in the IICC breast meat. The pH values and moisture content of thigh meat increased (P<0.05) with the increased level of FERM. The WHC decreased (P<0.05) with the elevated levels of FERM in the diets. There was an increase (P<0.05) in crude protein concentration in FERMA as compared to the other meats. Crude fat and ash concentrations in thigh meat were affected (P<0.05) by the treatments. Dietary treatments had no impact (P>0.05) on L* values of thigh meats. Feeding FERM at 7.5% from diets increased (P<0.05) and decreased (P<0.05) the redness and yellowness of meats. In conclusion, dietary inclusion of FERM especially at the level of 7.5% from diets improved the physical and chemical characteristics of the IICC meats.

Effect of Mercury on the Survival of Daphnia Magna

1990 ◽  
Vol 22 (5) ◽  
pp. 241-246 ◽  
Author(s):  
I. Brković-Popović
Keyword(s):  
Life Span ◽  
Daphnia Magna ◽  
Abiotic Factors ◽  
Total Hardness ◽  
Chemical Characteristics ◽  
Effect Concentration ◽  
Test Organisms ◽  
Lethal Time ◽  
Two Temperatures ◽  
Time Required

The median lethal time (LT) for each concentration of mercury was determined on the basis of mortality curves. Toxicity curves (i.e., the median life-span of Daphniamagna, LT 50, versus the concentration of mercury) for four tested conditions are shown. The experiments were carried out using two diluents of different total hardness (46 and 119 mg/l as CaCO3), at two temperatures (20°C and 25°C). A comparison of the LT 50s of the control organisms with the LT 50s of the test organisms at mercury concentrations of 0.0075 and 0.0050 mg. l-1 showed that the chemical characteristics and temperatures of the mediums tested did not affect the range of the ‘no effect' concentration. However, the incipient LC 50, and the time required for its appearance, did depend on the combination of the abiotic factors tested.

scholarly journals Experimental Interpretation of Physical and Chemical Characteristics of Soil Material upon the Radon and Thoron Exhalation Rate

2007 ◽  
Vol 42 (1) ◽  
pp. 89-97 ◽  
Author(s):  
Masahiro HOSODA ◽  
Yusuke YAMAMOTO ◽  
Kazumasa HARADA ◽  
Toshinari KORI ◽  
Masahiro FUKUSHI ◽  
...  
Keyword(s):  
Chemical Characteristics ◽  
Exhalation Rate ◽  
Soil Material ◽  
Physical And Chemical Characteristics ◽  
Physical And Chemical
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