Petri dishes

2015 ◽  
Keyword(s):  
Petri Dishes

Treatment of Timber by Nanofiber Fabric with Biocide Compound

2014 ◽  
Vol 1000 ◽  
pp. 154-157
Author(s):  
Zuzana Rácová ◽  
Petra Hrochová ◽  
Pavla Ryparová
Keyword(s):  
Dry Rot ◽  
Petri Dishes ◽  
Materials Used ◽  
Serpula Lacrymans ◽  
Filter Papers ◽  
Fungus Growth

Dry rot fungus (Serpula lacrymans) is wood-decaying fungus. It grows frequently in our territory and it causes big damages on structures. Remediation of damaged structures is very difficult, sometimes impossible, therefore it is necessary to study preventive protection against dry rot fungus. PVA nanofibred fabrics with synthetic and natural biocidal additives were used for this experiment. Filter papers soaked in dopes with biocidal substances were other materials used for this experiment. Pieces of nanofiber fabrics and pieces of filter papers soaked in dopes were placed to Petri dishes with broth. Small cuts of dry rot fungus were placed around them. This experiment was performed in conditions, which promote the growth of dry rot fungus. Growth of dry rot fungus was studied.

scholarly journals Response of Mexican Corn Rootworm to Insecticides, 1991

1995 ◽  
Vol 20 (1) ◽  
pp. 329-329
Author(s):  
E. Guerrero-Rodriguez ◽  
S. Davalos-Luna ◽  
J. Corrales-Reynaga
Keyword(s):  
Petri Dish ◽  
Mortality Data ◽  
Corn Rootworm ◽  
Field Corn ◽  
Paper Towel ◽  
Percent Mortality ◽  
Petri Dishes ◽  
Mexican Corn Rootworm ◽  
Corn Plants ◽  
Commercial Field

Abstract Populations of MCR of commercial field corn from Arenal, Jalisco were exposed to nine insecticides of organophosphorous (OP), cabamate, organo chlorinated and pyrethroid groups. Larvae were collected from the roots of corn plants daily, and confined in polyethylene black bags of two kg capacity with humidity and germinated corn as food for larvae. Insects were taken to the laboratory of Sanidad Vegetal in Guadalajara, Jalisco. Dilutions of the insecticides tested were prepared using acetone from 500 to 5000 ppm (6 to 9 dosage/product). For this study 20 larvae of last instar were selected and 1 u, liter of the solution was placed topically on the thorax, after this, each larva was placed in a petri dish with a moistened paper towel and the petri dishes confined in a cardboard box to eliminate light. Mortality counts were carried out at 24 hours. Percent mortality was corrected by Abbott’s formula. The mortality data were analyzed by probit to obtain LC50 and LC,5 values for each insecticide.

Effect of Zeolite Addition on the Properties of Bioplastic Composites of Carboxymethyl Cellulose-Urea

2019 ◽  
Vol 948 ◽  
pp. 175-180 ◽  
Author(s):  
Indriana Kartini ◽  
Kukuh Handaru Iskandar ◽  
Chotimah ◽  
Eko Sri Kunarti ◽  
Rochmadi
Keyword(s):  
Tensile Strength ◽  
Hydrogen Bonds ◽  
Strong Interaction ◽  
Carboxymethyl Cellulose ◽  
Slow Release ◽  
Polymer Chains ◽  
Solvent Casting ◽  
Ammonium Ions ◽  
Petri Dishes ◽  
Urea Inclusion

Bioplastic composites based on carboxymethyl cellulose (CMC) and urea have been successfully synthesised at various amount of zeolites. Urea inclusion into the bioplastics was supposed to result in nitrogen slow-release composites. The bioplastic composites were prepared by solvent casting the precursor gel containing 0.5 % (w/w) urea in CMC in the petri dishes. The zeolites content was varied at 0.1, 0.5, 1.0, 2.0, and 3.0 % (w/w to CMC). It showed that the addition of zeolites to the bioplastic composites up to 0.5% increased their tensile strength. More addition of zeolites decreased the strain of the bioplastic composite. It could be due to the formation of hydrogen bonds between CMC and zeolites. The amount of urea absorbed in the bioplastics increased as the amount of zeolites increases. It is possibly to be due to the strong interaction between urea and zeolites. The ammonium ions may interact with interchangeable cations in the zeolite. This interaction will also extend the time for the bioplastics to biodegrade. The presence of zeolites in the CMC polymer chains is useful to give nitrogen slow-release composites.

Ordered cylindrical micropatterned Petri dishes used as scaffolds for cell growth

2018 ◽  
Vol 513 ◽  
pp. 161-169 ◽  
Author(s):  
Van-Tien Bui ◽  
Le Thi Thuy ◽  
Joon Sig Choi ◽  
Ho-Suk Choi
Keyword(s):  
Cell Growth ◽  
Petri Dishes

Influence of Heat on Seed Germination of Cistus Laurifolius and Cistus Ladanifer

1992 ◽  
Vol 2 (1) ◽  
pp. 15 ◽  
Author(s):  
L Valbuena ◽  
R Tarrega ◽  
E Luis
Keyword(s):  
Seed Germination ◽  
High Temperatures ◽  
Exposure Time ◽  
Germination Rate ◽  
Heat Exposure ◽  
Cistus Ladanifer ◽  
Different Temperatures ◽  
Petri Dishes ◽  
Germinated Seeds

The influence of high temperatures on germination of Cistus laurifolius and Cistus ladanifer seeds was analyzed. Seeds were subjected to different temperatures for different times, afterwards they were sowed in plastic petri dishes and monitored for germinated seeds over two months.The germination rate observed in Cistus ldanifer was greater than in Cistus laurifolius. In both species, heat increased germination percentages. For Cistus laurifolius higher temperatures or longer exposure times were needed. Germination percentages of Cistus ladanifer were lower when heat exposure time was 15 minutes.It must be emphasized that germination occurred when seeds were not treated, while seeds exposed to 150�C for 5 minutes or more did not germinate.

LONG TERM EFFECTS OF THYROID STIMULATING HORMONE AND INSULIN ON INTRACELLULAR pH IN FRTL-5 CELLS

1992 ◽  
Vol 133 (2) ◽  
pp. R9-R11
Author(s):  
A.M. Wood ◽  
S.P. Bidey ◽  
J. Soden ◽  
W.R. Robertson
Keyword(s):  
Intracellular Ph ◽  
Small Groups ◽  
Thyroid Stimulating Hormone ◽  
Ph Sensitive ◽  
Long Term Effects ◽  
Bicarbonate Ions ◽  
Chronic Effects ◽  
Petri Dishes ◽  
Presence And Absence

ABSTRACT We have studied the chronic effects of TSH (100μU/ml) and insulin (10μg/ml) on intracellular pH (pHi) in FRTL-5 cells using the pH sensitive probe 2′7-bis (2-carboxyethyl-5′-6′) carboxyfluorescein. FRTL-5 cells were cultured on Petri dishes either in the presence of 4H, ie. Coons F-12 containing cortisol (10nM), transferrin (0.5μg/ml), glycyl-histidyl lysine acetate (10ng/ml) and somatostatin (10μg/ml), or with 4H+insulin (5H), 4H+TSH, or 4H+TSH+insulin (6H). pHi was measured in small groups of cells by microspectrofluorimetry both in the presence and absence of bicarbonate ions after cells had been deprived of serum for at least a day. In

scholarly journals Filamentous fungi isolated from sand and water of "Bairro Novo" and "Casa Caiada" beaches, Olinda, Pernambuco, Brazil

2008 ◽  
Vol 68 (3) ◽  
pp. 577-582 ◽  
Author(s):  
DNF. Gomes ◽  
MAQ. Cavalcanti ◽  
MJS. Fernandes ◽  
DMM. Lima ◽  
JZO. Passavante
Keyword(s):  
Water Samples ◽  
Water Surface ◽  
High Tide ◽  
Sand Sample ◽  
Distilled Water ◽  
Sabouraud Agar ◽  
Sand Surface ◽  
Heterotrophic Microorganisms ◽  
Petri Dishes ◽  
Dry And Rainy Seasons

Fungi comprehend a heterogeneous group of heterotrophic microorganisms that act as saprobes or parasites or, less frequently, as symbionts living in association with other organisms. They are cosmopolitan and important components of ecosystems. Considering the small number of Brazilian papers on the filamentous mycota in marine environments, and the need to improve knowledge of the diversity of these microfungi in "Casa Caiada" and "Bairro Novo" beaches, Olinda, PE, the aim of this work was to isolate and identify the fungi from sand and water samples of these ecosystems. Thirty two samplings of sand (surface and 20 cm deep) and water (surface and 1 m deep) were carried out during the dry and rainy seasons, in low and high tide. From each sand sample, a suspension was made with 50 g of sand diluted in 90 mL of sterilized distilled water. From each sand suspension and water sample, 0.5 mL was spread, in triplicate, onto Petri dishes containing Sabouraud Agar added of chloramphenicol. The plates were incubated at 28 °C (±2 °C). Fifty seven species were isolated, identified, and classified in 20 genera. Aspergillus and Penicillium were the most frequent genera in both sand and water, with a total of 11 and 19 species, respectively.

scholarly journals Nondestructive evaluation of photosynthesis by delayed luminescence inArabidopsisin Petri dishes

2015 ◽  
Vol 80 (3) ◽  
pp. 452-460 ◽  
Author(s):  
Paweena Chuenwarin ◽  
Azumi Shimazaki ◽  
Masanori Shimizu ◽  
Yuko Kobayashi ◽  
Masakazu Katsumata ◽  
...  
Keyword(s):  
Nondestructive Evaluation ◽  
Delayed Luminescence ◽  
Petri Dishes
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