جستجوی مقالات مرتبط با کلیدواژه "greenhouse" در نشریات گروه "پزشکی"

Many urban farms are designed to be indoors or use traditional soil or energy generation techniques. Microgrids provide local electricity to a small network of users with power storage. Few urban farms and microgrids are designed and engineered to draw energy from extreme weather events producing electricity and water. The current study examines the feasibility of a self-sufficient, adaptive small-scale microgrid farm harnessing power from multiple renewable energy (solar and wind), and rainwater collection techniques while producing food. This study’s objective is to conduct an investigative Root Cause Analysis of an outdoor hydroponic system named Pangea. The study findings suggest an outdoor hydroponic system shares many defects from exposure to shifts in climatic conditions to poor engineering and design. The concept and technological aspect of this work can be transferred to commercial, large-scale greenhouse.

This study was aimed to isolate Rhizobium spp., from the plant rhizosphere and to investigate their effects on the growth of peanut (Arachis hypogaea L.) as plant growth-promoting rhizobacteria (PGPR).

The isolates were characterized using YEMA, YEMA + Congo Red, and YEMA + Bromothymol blue (BTB) media. The Rhizobium was tested qualitatively for their ability to produce indole acetic acid (IAA), siderophores, proteases, nitrogenases as well as phosphate solubilizing activity. A greenhouse experiment was carried out to elucidate the effect of Rhizobium inoculation on Arachis hypogaea L. growth.

Eleven isolates were obtained in YEMA media and they were red-pink in the YEMA + Congo Red media. The YEMA + BTB test showed that 2 isolates were slow-growing and the rest were fast-growing isolates. Seven isolates produced siderophores, 5 were capable of phosphate solubilizing, 9 isolates produced protease enzyme, 4 isolates could produce IAA, and 7 isolates could fix nitrogen. The B1 and the combination of some high trait-isolate treatments in Y gave the best results on Arachis hypogaea L. growth.

These isolates can be developed as biological fertilizer agents for the peanut plant.

Many urban farms are designed to be indoors or use traditional soil or energy generation techniques. Microgrids provide local electricity to a small network of users with power storage. Few urban farms and microgrids are designed and engineered to draw energy from extreme weather events producing electricity and water. The current study examines the feasibility of a self-sufficient, adaptive small-scale microgrid farm harnessing power from multiple renewable energy (solar and wind), and rainwater collection techniques while producing food. This study’s objective is to conduct an investigative Root Cause Analysis of an outdoor hydroponic system named Pangea. The study findings suggest an outdoor hydroponic system shares many defects from exposure to shifts in climatic conditions to poor engineering and design. The concept and technological aspect of this work can be transferred to commercial, large-scale greenhouse.

Greenhouse workers are exposed to a variety of biomechanical risks, repetitive movements, and awkward posture. This study aimed to assess the risk of upper limb injuries in greenhouse workers and its relationship with musculoskeletal disorders (MSDs). This descriptive, analytic, cross-sectional study was conducted among 50 greenhouse workers. The data related to MSDs were collected using a body map and interview. The OCRA and ACGIHHAL methods were used to assess the risk factors of the upper limb disorders in six repetitive tasks. The data were analyzed by univariate logistic regression. The results showed that 62% of the workers had MSDs in the upper limbs over the last year. Grafting task had the highest OCRA index and HAL-TLV (8.3 and 0.59). The highest percentage of pain was in the fingers (75%). Univariate regression test showed a significant relationship between the three parts of the upper limb (wrist, palm, and fingers) and the OCRA index (OR=0.30, 95%CI=0.15-0.61; OR=0.26, 95%CI=0.11–0.59; OR=0.21, 95%CI=0.08–0.51; respectively). The prevalence of MSDs was one-third in the wrist. Grafting task was the most dangerous activity, and tasks such as pruning, weeding, and transplanting had a medium risk. Use of ergonomic tools in tasks such as grafting, pruning, and harvesting is recommended. In weeding task, in which repetitive work is done for a long time, management measures such as training, job rotation, and increasing rest time could reduce MSDs.

In recent decades, unsafe use of pesticides has caused different cancers in human beings as well as damages to environment and organisms.
The present study aimed to determine the predictors of safety behavior among greenhouses spray workers in Jiroft city based on Protection Motivation Theory (PMT).
This cross-sectional study with descriptive-correlation approach was conducted in 2016 on 229 greenhouse spray workers in Jiroft city selected via proportional stratified random sampling using a researcher-made questionnaire. The questionnaire consisted of demographic variables and PMT constructs such as perceived vulnerability, perceived severity, costs, rewards, fear, self-efficacy, response-efficacy, and protection motivation, as well as safety behaviors.
All workers were male in the age range of 19 to 72 years, most of whom (47.6%) had previously been poisoned by pesticides. The mean scores of all the PMT constructs were in range of 50% to 75% except for perceived rewards that its mean score was between 75% and 100%. There was a significant correlation between response-efficacy and all the constructs at P Concerning predictive power of protection motivation theory constructs for safety behaviors related to spray workers’ health and due to the important role of perceived vulnerability, perceived severity, self-efficacy, and response-efficacy, educational interventions are necessary for training protective principles to prevent health problems resulted from exposure to pesticides in workers.

The objective of this study was to determine the residual concentrations of ethion and imidacloprid in cucumbers grown in greenhouse. The effect of some simple processing procedures on both ethion and imidacloprid residues were also studied.
Ten active greenhouses that produce cucumber were randomly selected. Ethion and imidacloprid as the most widely used pesticides were measured in cucumber samples of studied greenhouses. Moreover, the effect of storing, washing, and peeling as simple processing procedures on both ethion and imidacloprid residues were investigated.
One hour after pesticide application; the maximum residue levels (MRLs) of ethion and imidacloprid were higher than that of Codex standard level. One day after pesticide application, the levels of pesticides were decreased about 35 and 31% for ethion and imidacloprid, respectively, which still were higher than the MRL. Washing procedure led to about 51 and 42.5% loss in ethion and imidacloprid residues, respectively. Peeling procedure also led to highest loss of 93.4 and 63.7% in ethion and imidacloprid residues, respectively. The recovery for both target analytes was in the range between 88 and 102%.
The residue values in collected samples one hour after pesticides application were higher than standard value. The storing, washing, and peeling procedures lead to the decrease of pesticide residues in greenhouse cucumbers. Among them, the peeling procedure has the greatest impact on residual reduction. Therefore, these procedures can be used as simple and effective processing techniques for reducing and removing pesticides from greenhouse products before their consumption.