Ambient dose equivalent rate and soil contamination density with 137Cs in kitchen gardens in settlements of the Bryansk region, Russia in 2020–2021

The article provides results of application of the field (in situ) gamma spectrometry method for carrying out mass monitoring measurements of ambient dose equivalent rate and soil contamination density with 137Cs in kitchen garden plots located in the zone of radioactive contamination after the Chernobyl accident. In 2020 and 2021, 115 private farmsteads in 46 settlements of the Bryansk region were surveyed. At the time of the survey, the officially established average density of soil contamination with 137Cs in the settlements ranged from 27 to 533 kBq/m2 . The field spectra were measured using a portable scintillation gamma-spectrometer-dosimeter. Results of the field measurements and subsequent calculations of soil contamination density with 137Cs in the kitchen gardens were in good agreement with official data on the average soil contamination density with 137Cs in the surveyed settlements. The mean value of the ratio of the experimental data to the official data was 1.04. Individual values of experimental data deviated from corresponding official values by no more than two times. The use of the gamma spectrometry method in situ made it possible: 1) to determine separately values of the ambient dose equivalent rate from 137Cs and from natural radionuclides in the soil, and 2) to estimate the effective external doses to a person who worked in the kitchen gardens. The measured values of ambient dose equivalent rate varied from 17 to 53 nSv/h (mean ± standard deviation = 35 ± 9 nSv/h) for natural radionuclides and from 8 to 432 nSv/h (mean ± standard deviation = 125 ± 91 nSv/h) for 137Cs. The ambient dose equivalent rate from 137Cs normalized to the soil contamination density with 137Cs in the same kitchen garden was in the range of 0.41–0.84 (nSv/h)/(kBq/m2 ) with a mean value of 0.55 (nSv/h)/(kBq/m2 ). If a person stayed in kitchen garden for 840 hours per year, the estimated effective external doses from natural radionuclides and 137Cs were respectively in the range of 0.008–0.025 mSv/year and 0.004–0.20 mSv/year.

Modelling and Analysis of a Solid Waste Composter for Urban Houses

Disposal of waste is an important issue faced by sanitation agencies, especially in India, where the volume of waste generated has been increasing rapidly over the last few years. According to the Ministry of Housing and Urban Affairs, as of January 2020, 147,613 metric tonnes (MT) of solid waste is generated per day in the country. Part of the waste that is expunged on a daily basis from homes, is food and other kitchen waste, which are biodegradable or compostable. In rural areas, such waste is disposed of in landfills, such that they get decomposed to form compost that is used as manure for crops. But this is not feasible in large cities where empty land, as well as the time required for waste to get converted into compost, is in short supply. Composting is a proven method to reduce the volume of waste, to almost 15-20% of its original amount. Therefore, this work is focused on designing an electric composter that could decompose waste artificially, and is compact, efficient, odourless, and easy to operate. This product can thus manage biodegradable waste at the source of its generation, and effectively supplant the wastebasket in a kitchen by occupying no greater space than the latter. The yield of compost would also provide nutritive natural fertilizer to homes wherein kitchen gardens or terrace farms have been set up, as well as promote the creation of the same wherever space is available. In this paper, the important parameters involved in the design of composter, including geometry parameters and the ones of operational significance such as speed and number of blades of agitator and bin temperature, have been discussed thoroughly, along with providing an understanding of the processes and considerations necessitated.

An Underexplored Diversity in “Yoksik Peron” [Lablab Purpureus (L.) Sweet] in East Siang, Arunachal Pradesh, India

As a legume and a source of protein, hyacinth bean [Lablab purpureus (L.) Sweet] serves as a resilient and efficient source not only of calories but also of proteins and has several therapeutic properties besides, which makes it a truly multifunctional legume. The present study describes the wide morphological diversity in “Yoksik peron” (local name of lablab bean) found in Pasighat (East Siang district, Arunachal Pradesh) represented by14 landraces conserved and cultivated by the indigenous people mainly in their backyards and kitchen gardens. The width of the pod ranged from 1.6cm to 4.1cm and its length, from 4.7 cm to 20.1cm. The pods also differed in colour, seed size, and shape. Many of those landraces are more resistant to several biotic and abiotic sources of stress. Such diversity offers the opportunity to identify and select the genotypes with greater tolerance to stress, thereby contributing to making the ecosystem more resilient. In addition, contemporary studies on hyacinth bean have shown the wide range of health benefits it offers, especially its potent anti-obesity properties. To realize the bean’s full potential, we need an enabling policy environment for furthering research and mainstreaming to other locations.

Diversity and Diet Differences of Small Mammals in Commensal Habitats

The stability of diversity of syntopic (inhabiting the same habitat in the same time) small mammals in commensal habitats, such as farmsteads and kitchen gardens, and, as a proxy of their diet, their isotopic niches, was investigated in Lithuania in 2019–2020. We tested whether the separation of species corresponds to the trophic guilds, whether their diets are related to possibilities of getting additional food from humans, and whether their diets are subject to seasonal trends. We analyzed diversity, dominance and distribution of hair δ13C and δ15N values. Diversity and dominance was not stable and differed according to human influence. The highest small mammal species richness occurred in commensal habitats that provided additional food. The degree of separation of species was higher in homestead habitats than in kitchen gardens, where a 1.27 to 35.97% overlap of isotopic niches was observed between pairs of species. Temporal changes in δ13C and δ15N values in the hair of the mammals were not equally expressed in different species. The isotopic overlap may depend on dietary plasticity, minimizing interspecific competition and allowing co-existence of syntopic species. Thus, small mammal trophic ecology is likely related to intensity of agricultural activities in the limited space of commensal habitats.

Using Formative Research to Inform a BCC Strategy to Increase Food Security and Dietary Diversity in Low-Income Rural Communities

Background: Adequate nutrition is a public health priority, particularly in low-income rural areas where there is a high prevalence of malnutrition and stunting. Baluchistan is an arid desert and mountainous province with the worst health indicators in Pakistan. The objective of this research study was to identify current knowledge, attitudes and practices of vulnerable women with young children residing in remote areas of Baluchistan and assess their information needs to guide the development of a BCC nutrition strategy materials and activities. Methods: This study design incorporated formative research via eight focus group discussions with demand and supply-side program beneficiaries (n=124) to assess current nutrition knowledge, attitudes and beliefs toward kitchen gardens and proposed nutrition resources. Semi-structured interviews (n=16) were also conducted to provide program intelligence from key informants. A literature review supported the development of discussion agenda based on predominant behavioral theories. Data analysis was conducted with in vivo qualitative software coupled with grounded theory with qualitative findings triangulated. Results: The study identified important factors for the development of BCC resources and activities. Opportunities included effective nutrition education, improved income and livelihoods from kitchen gardens, women’s empowerment and gender equality. Challenges included traditional cultural practices, entrenched food preparation behaviour, environmental and infrastructural constraints. Conclusions: Lessons learned highlight the benefits of integrating formative research methods with a comprehensive literature review and behavioural theories for the development of BCC resources for nutrition programs in insecure and resource-constrained settings.

Validation of a method for in situ determination of 137Cs soil contamination density in kitchen gardens using the portable spectrometer-dosimeter MKS AT6101D

The collection of representative soil samples in the territory of settlements and subsequent measurements of the content of radionuclides in these samples under laboratory conditions (the so-called “ex situ method”) is a generally accepted technology for determining the density of soil contamination with 137Cs in the populated areas contaminated due to the Chernobyl accident. Recently, as a supplement or alternative to the ex situ method, researchers are developing field (in situ) gamma-spectrometry methods. These methods allow determining the density of soil contamination with 137Cs directly on site, without soil sampling and laboratory analysis. At the same time, the in situ methodology has several limitations, the most important of which is a lack of generally recognized metrological basis for measurements and interpretation of results. Hence, before using a particular technique and measuring device for carrying out large-scale in situ measurements, it is necessary to validate (to assess the suitability) of the selected in situ method using an established ex situ method. The aim of this study was to validate the method for determining the density of 137Cs soil contamination in kitchen gardens using the MKS AT6101D spectrometer-dosimeter in situ. The method was recently presented by a Russian-Swedish-Belarusian group of researchers in an article published in the Journal of Environmental Radioactivity (https://doi.org/10.1016/j.jenvrad.2021.106562). To validate this method, we selected 10 representative kitchen garden plots. The plots were located in six settlements of the Bryansk region in Russia. The territory of the settlements had been heavily contaminated with 137Cs as a result of the Chernobyl accident: the officially established levels of the density of soil contamination by 137Cs ranged from 111 to 511 kBq/m2 in 2017. Field gamma-ray spectra were recorded at a height of 1 m above the ground in the center of kitchen garden plots using the MKS AT6101D device. The measurement duration was in the range of 1207–1801 s (the mean value = 1383 s). Samples of soil in the kitchen gardens were taken layer by layer (with a step of 5 cm) to a depth of 20 cm using a demountable cylindrical sampler. The 137Cs content in each soil layer was determined in the laboratory using a stationary semiconductor gamma spectrometer. The values of the 137Cs contamination density of the sampled soils ranged from 77 to 548 kBq/m2. It was found that the results of the ex situ analyzes of soil samples were in a good agreement with the contamination density values obtained with the in situ method. On average, the difference between two methodologies was 7% (a maximum of 20%). The results of the study confirm that the method proposed by the international group is suitable for determining the density of soil contamination by 137Cs in kitchen gardens in remote period after the Chernobyl accident.

Can Potato Plants Be Colonized with the Fungi Metarhizium and Beauveria under Their Natural Load in Agrosystems?

Beauveria and Metarhizium fungi are facultative plant endophytes that provide plant growth-stimulating, immunomodulatory, and other beneficial effects. However, little is known about the level of plant colonization by these fungi under natural conditions. We assessed the endophytic colonization of potatoes (Solanum tuberosum) with entomopathogenic fungi at their natural load in soils (102–104 colony-forming units per g). Microbiological analyses of soils and plant organs, as well as a metagenomic analysis of potato roots and leaves, were conducted in three locations in Western Siberia, consisting of conventional agrosystems and kitchen gardens. The fungi were isolated at a relatively high frequency from unsterilized roots (up to 53% of Metarhizium-positive plants). However, the fungi were sparsely isolated from the internal tissues of roots, stems, and leaves (3%). Among the genus Metarhizium, two species, M. robertsii and M. brunneum, were detected in plants as well as in soils, and the first species was predominant. A metagenomic analysis of internal potato tissues showed a low relative abundance of Beauveria and Metarhizium (<0.3%), and the communities were represented primarily by phytopathogens. We suggest that colonization of the internal tissues of potatoes occurs sporadically under a natural load of entomopathogenic fungi in soils. The lack of stable colonization of potato plants with Beauveria and Metarhizium may be due to competition with phytopathogens.

”La naturaleza viva debe ocupar el primer plano”. Un estudio sobre el Diccionario de Pedagogía (1936) de editorial Labor y la enseñanza de las ciencias físico-químicas y naturales

We present the study of one of the great projects of the Barcelona publisher Editorial Labor, namely the Diccionario de Pedagogía (1936), from a new perspective: the analysis of entries on the teaching of scientific subjects. The axis of the methodologies proposed by the work is the study of living things in their natural environment from an ecological perspective, both outside the classroom via excursions and inside through aquaria, terraria, herbaria and school kitchen gardens. These methodologies can be seen to have been be influenced by New Education principles, the English Nature Study movement and the Spanish Institución Libre de Enseñanza. Coordinated by Luis Sánchez Sarto, the Diccionario de Pedagogía recorded the state of pedagogy and education worldwide, counting on a hundred or so anonymous authors most of whom were German, Austrian, American or Spanish. John Dewey, Vilhelm Rasmussen and Georg Kerschensteiner are the dictionary’s pedagogical references in science teaching. In our article, we present arguments suggesting that Margarita Comas Camps and Rafael Candel Vila were the authors of the dictionary’s two entries on teaching methodology.

Using Formative Research to Inform a BCC Strategy to Increase Food Security and Dietary Diversity Through a Kitchen Gardens Project in Low-Income Rural Communities

Background Adequate nutrition is a public health priority, particularly in low-income rural communities where there is a high prevalence of malnutrition and stunting. Baluchistan is an arid desert and mountainous Province with the worst health indicators in Pakistan. The objective of this study was to identify current knowledge, attitudes and practices of vulnerable women with young children residing in remote areas of Balochistan and assess their information needs to guide the development of a BCC nutrition strategy materials and activities to support a Kitchen Gardens Project. Methods The needs assessment incorporated formative research via eight focus group discussions with demand and supply-side program beneficiaries (n = 124) to assess current nutrition knowledge, attitudes and beliefs toward kitchen gardens and proposed nutrition resources. Semi-structured interviews (n = 16) were also conducted with key stakeholders. A literature review supported the development of discussion agenda based on predominant behavioural theories. Data analysis was conducted with NVivo qualitative software coupled with grounded theory with triangulation of findings Results Opportunities categories for BCC identified more effective nutrition education, incentives of improved income and livelihoods from kitchen gardens, women’s empowerment and gender equality. Challenges included traditional cultural practices, entrenched food preparation behaviours, environmental and infrastructural constraints. Conclusions Lessons learned highlight the benefits of integrating a rapid assessment formative research method with a literature review including behavioural theories for BCC resource development for nutrition programs in culturally conservative, insecure and resource constrained settings.

Beans and Melons: Rousseau’s Vegetable Garden

This article focuses on a rarely studied aspect of Jean-Jacques Rousseau’s oeuvre: his interest in gardening and more precisely vegetable gardening. Close attention to the text reveals that gardening is part of larger philosophical questions related to private property, luxury, space, education and theatre. Some of Rousseau’s most productive ideas are supported by references to gardening particularly the cultivation of ‘miserable’ beans and ‘prized’ melons. The two plants which were commonly grown in eighteenth-century gardens are at the centre of a philosophical parable in Emile. Beans and melons and their symbolical values fertilise larger questions Rousseau engaged with throughout his life. Although he favoured botany over horticulture, he used kitchen gardens as sites of philosophical experiments.