scholarly journals Conservació i condicionament de la vitrina de les sals del Museu Martorell (Museu de Ciències Naturals de Barcelona): 1921-2018

2019 ◽  
pp. 25-37
Author(s):  
M. Campeny ◽  
M. Pérez-Azcárate ◽  
S. Duque-Valero ◽  
D. Fernández-Lluch ◽  
E. Garcia-Franquesa ◽  
...  
Keyword(s):  
Relative Humidity ◽  
19Th Century ◽  
Environmental Conditions ◽  
High Relative Humidity ◽  
Optimal Conditions ◽  
Original Design ◽  
Salt Rocks ◽  
Sustainable System ◽  
Set Up ◽  
Over Time

Conservation and conditioning of the salts showcase of the Museu Martorell (Museu de Ciències Naturals de Barcelona): 1921-2018 The Cardona salts showcase was built and designed in 1921 by Francesc Pardillo. Located at the Museu Martorell building (Museu de Ciències Naturals de Barcelona) it exposes and preserves a collection of salt rocks from the Cardona Salt Mountain. These specimens were donated at the end of 19th century by Ms. Casilda de Salabert i Arteaga (Medinaceli Duchess) and Mr. Miguel De Elías Marchal and represent a collection with a significant heritage and historic value. Due to the trace of time and the lack of conditioning interventions, this showcase did not preserve the samples in optimal conditions. The specimens began an alteration process interacting with high relative humidity, also generating the general degradation of the showcase furniture. In order to stop this degradation, it has been carried out an integral conditioning of this showcase but also of the salt specimens. This process has been executed respecting the original design of the showcase and carrying out the minimum intervention into the rock samples. In addition, a new passive and sustainable system to control environmental conditions has been set up to maintain optimal humidity conditions. This action stopped the degradation of the showcase as well as the specimens and guarantees their preservation over time.

Effect of relative humidity on the airborne survival of rhinovirus-14

1985 ◽  
Vol 31 (11) ◽  
pp. 1058-1061 ◽  
Author(s):  
Yasmin G. Karim ◽  
M. Khalid Ijaz ◽  
Syed A. Sattar ◽  
C. Margaret Johnson-Lussenburg
Keyword(s):  
Relative Humidity ◽  
Environmental Conditions ◽  
Half Life ◽  
Infectious Virus ◽  
High Relative Humidity ◽  
Rotating Drum ◽  
Air Samples ◽  
Tryptose Phosphate Broth ◽  
Air Sample

Rhinovirus-14, suspended in tryptose phosphate broth supplemented with uranine (physical tracer) and an antifoam, was aerosolized by use of a Collison nebulizer. The aerosols were held in a rotating drum with the relative humidity at either the low (30 ± 5%), medium (50 ± 5%), or high (80 ± 5%) level at 20 ± 1 °C. An all-glass impinger was used to recover the virus from the air in the drum, with the first air sample being collected after a 15-min period of aerosol stabilization. Subsequent air samples were withdrawn at 2, 4, 8, and 14 h after stabilization of the aerosol. At the low and medium relative humidity levels, the infectivity of the airborne virus was rapidly lost and less than 0.25% could be detected in the first air sample. At the high RH level, however, the airborne virus had a half-life of 13.7 ± 1.91 h and nearly 30% of the input infectious virus could be detected in the drum air even after 24 h of aerosolization. These findings suggest that under certain environmental conditions, notably high relative humidity, air may act as a vehicle for the spread of rhinovirus infections.

Rate and course of sporulation of oocysts ofEimeria acervulinaunder different environmental conditions

Parasitology ◽  
1994 ◽  
Vol 108 (5) ◽  
pp. 497-502 ◽  
Author(s):  
E. A. M. Graat ◽  
A. M. Henken ◽  
H. W. Ploeger ◽  
J. P. T. M. Noordhuizen ◽  
M. H. Vertommen
Keyword(s):  
Relative Humidity ◽  
Significant Influence ◽  
Interaction Effect ◽  
Environmental Conditions ◽  
Optimal Conditions ◽  
Maximum Percentage ◽  
Eimeria Acervulina ◽  
Rate Of Increase

SummaryAn experiment was conducted to determine the rate and maximum percentage of sporulation ofEimeria acervulinaoocysts at various environmental conditions relating to temperature (21 versus 33 °C) and relative humidity (RH) (40 versus 80%). Measurements were made during 44 h after excretion of oocysts in 3 substrates: dry litter, clammy litter and pure faeces respectively. Maximum sporulation percentage in both dry (22·6%) and clammy litter (19·5%) was higher (P< 0·005) than in pure faeces (11·6%). Neither temperature nor RH had a significant influence on percentage of oocysts that sporulated. Under these simulated practical conditions approximately 25% of all oocysts sporulated, whereas sporulation under optimal conditions (29 °C, aeration, 2% K2Cr2O7) showed a higher (68%) sporulation ability of oocysts. At 33 °C sporulation proceeded at a faster pace than at 21 °C (P< 0·005). With respect to RH and substrate, once sporulation started, the rate of increase to maximum percentage was not different. Time of onset of sporulation was influenced by temperature (P< 0·0001) and RH (P< 0·001). Time of onset occurred 15 h later at 21 °C compared with 33 °C and 5 h later at 40% RH compared with 80%. Also, an interaction effect (P< 0·01) was found with effect of RH being stronger at 21 °C compared with 33 °C. It was concluded that the most important aspect in the epidemiology ofE. acervulinaduring a flock cycle is the time of onset of sporulation with temperature being the most important factor.

scholarly journals Upbringing of girls as reflected in the activities and views of Blessed Marcelina Darowska

2018 ◽  
pp. 101-115
Author(s):  
Marcelina Knop
Keyword(s):  
19Th Century ◽  
Young Women ◽  
Virgin Mary ◽  
Educational Activities ◽  
Blessed Virgin Mary ◽  
Immaculate Conception ◽  
Practical Education ◽  
Set Up ◽  
The 19Th Century ◽  
Over Time

The article presents the life and educational activities of Blessed Marcelina Darowska, the cofounder of the Convent of the Immaculate Conception of the Blessed Virgin Mary, and her views on upbringing of young women. Mother Marcelina’s perception of education of girls in the 19th century seemed modern and beyond her time. In her opinion, there was a need of putting a stop to producing “parlour dolls” and provide young women with practical education. For the betterment of the country, she set up schools in Jazłowiec, Jarosław, Niżniów and Nowy Sącz. The girls attending the schools were brought up according to the system developed by Marcelina Darowska, based on religious and patriotic values. The Convent of the Immaculate Conception of the Blessed VirginMary continues the work commenced by its founder; over time Mother  Marcelina’s message remains valid and serves the subsequent generations of young Polish girls.

Monitoring Environmental Conditions with Low-Cost Single Board Computers

2017 ◽  
Vol 46 (4) ◽  
pp. 124-131
Author(s):  
Monica Maceli ◽  
Anthony Cocciolo
Keyword(s):  
Relative Humidity ◽  
Environmental Conditions ◽  
Low Cost ◽  
Building Design ◽  
Hvac Systems ◽  
Ease Of Use ◽  
The Creation ◽  
Do It Yourself ◽  
Commercial Device ◽  
Over Time

Abstract:Controlling environmental conditions is an important component in preserving archives and manuscripts, with building design and HVAC systems widely used to achieve the desired conditions. One tool used for monitoring HVAC systems is the datalogger, which stores data such as temperature and relative humidity. As such devices can be costly and inflexible, this work explores the creation of a do-it-yourself datalogger and compares its accuracy, reliability, extensibility, cost, and ease of use against a popular commercial device. Findings suggest that organizations with sufficiently technology-savvy staff can construct and employ a DIY monitor for approximately one-quarter the price of commercial options, although costs may rise over time for support and maintenance of such systems.

scholarly journals Desiccation Stress and the Effect of Humidity in Mosses

2010 ◽  
Vol 2 (1) ◽  
pp. 40-42
Author(s):  
Aina Arinola FAJUKE
Keyword(s):  
Relative Humidity ◽  
Environmental Conditions ◽  
Cell Walls ◽  
Desiccation Stress ◽  
Moss Species ◽  
Structural Adaptations ◽  
Over Time ◽  
Fair Degree

Mosses show fair degree of structural adaptations to different environmental conditions. The effects caused by desiccation were determined in the shoots of six moss species, collected from various locations of the Obafemi Awolowo University Ile-Ife campus, Osun State, Nigeria. Using 0.1 g of fresh weights, desiccation of moss species over time at 0%, 52%, and 100% relative humidity, were determined by putting the shoots into desiccators and reweighing at intervals of 15 min, 30 min, 1 hr and on the 8th day. It was concluded that the locations of the moss species, and the fact that the cell walls of all the mosses were thick, were regarded as the adaptations which helped these mosses survived desiccation stress.

Reduction of Acquisition Time for RIL, SDL, and LADA

2007 ◽  
Author(s):  
Arjan Mels ◽  
Frank Zachariasse
Keyword(s):  
Background Noise ◽  
Signal Strength ◽  
Acquisition Time ◽  
Optimal Conditions ◽  
Signal Collection ◽  
Defect Localization ◽  
Model Equations ◽  
Set Up ◽  
Main Operating ◽  
Quantitative Tool

Abstract Although RIL, SDL and LADA are slightly different, the main operating principle is the same and the theory for defect localization presented in this paper is applicable to all three methods. Throughout this paper the authors refer to LADA, as all experimental results in this paper were obtained with a 1064nm laser on defect free circuits. This paper first defines mathematically what 'signal strength' actually means in LADA and then demonstrates a statistical model of the LADA situation that explains the optimal conditions for signal collection and the parameters involved. The model is tested against experimental data and is also used to optimise the acquisition time. Through this model, equations were derived for the acquisition time needed to discern a LADA response from the background noise. The model offers a quantitative tool to estimate the feasibility of a given LADA measurement and a guide to optimising the required experimental set-up.

Persistence of nosocomial bacteria on 2 biocidal fabrics based on silver under conditions of high relative humidity

2014 ◽  
Vol 42 (8) ◽  
pp. 879-884 ◽  
Author(s):  
Rosa López-Gigosos ◽  
Alberto Mariscal ◽  
Mario Gutierrez-Bedmar ◽  
Eloisa Mariscal-Lopez ◽  
Joaquín Fernández-Crehuet
Keyword(s):  
Relative Humidity ◽  
High Relative Humidity

scholarly journals 77 The effect of naturally occurring levels of multiple mycotoxins on growth performance and carcass parameters of grow-finish pigs

2020 ◽  
Vol 98 (Supplement_3) ◽  
pp. 54-55
Author(s):  
Leigh Ruckman ◽  
Stacie Gould ◽  
John Patience
Keyword(s):  
Growth Performance ◽  
Economic Impact ◽  
Environmental Conditions ◽  
Fixed Effects ◽  
Control Diet ◽  
Naturally Occurring ◽  
Carcass Parameters ◽  
Low Levels ◽  
Dietary Treatments ◽  
Over Time

Abstract Mycotoxins may not be an issue every year, but the proper environmental conditions can cause a spike in contaminated grains and cause severe economic impact on pork producers. The objective of this study was to determine the effect of naturally occurring infections of deoxynivalenol, zearalenone and fumonisins (DZF) on growth performance and carcass parameters in grow/finish pigs. One hundred pigs (BW 34.0 ± 0.9 kg; L337 × Camborough, PIC, Hendersonville, TN) were randomly assigned to 1 of 2 dietary treatments with 10 split-sex pens/treatment. The control diet (CTL) contained low levels of DZF and the CTL+DFZ diet contained high levels of DZF. Diets were fed in 4 phases over the 126-d experiment period. The CTL diet contained 1.6, 1.6, 1.8 and 1.2 mg deoxynivalenol/kg and CTL+DZF contained 9.2, 6.9, 5.8 and 3.8 mg deoxynivalenol/kg in the 4 diet phases, respectively. The CTL contained 0.30, 0.32, 0.51 and 0.32 mg zearalenone/kg and 0.7, 0.8, 0.8 and 0.9 mg total fumonisins/kg; CTL+DFZ contained 0.59, 0.72, 0.86 and 0.57 mg zearalenone/kg and 1.0, 1.1, 1.2 and 0.9 mg total fumonisins/kg for phases one through four, respectively. Data were analyzed using PROC MIXED of SAS (9.4) with treatment, sex, and their interaction as fixed effects. Compared to CTL, feeding CTL+DFZ decreased final BW (130.3 vs 120.5 kg; P&lt; 0.001), ADG (0.95 vs 0.79 kg/d; P&lt; 0.001), ADFI (2.73 vs 2.49 kg/d; P=0.016), and G:F (0.35 vs 0.32; P=0.043). Feeding CTL+DFZ decreased HCW (92.3 vs 89.4 kg; P=0.024) and increased dressing percentage (70.9 vs 74.3%; P=0.009) and tended to reduce loin depth (7.0 vs 6.8 cm; P=0.057) compared to CTL. Diet did not affect backfat depth or lean percentage (P &gt;0.10). In conclusion, diets naturally contaminated with multiple mycotoxins reduced growth performance and adversely affected carcass parameters; pigs did not adapt over time to the mycotoxins.

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