Un indicador visual de la madurez fisiológica de habichuelas de inflorescencia indeterminada

Two indeterminate breeding lines, L-227 and RAB 205, were planted during two growing seasons for the purpose of identifying a visual indicator of physiological maturity of dry beans which could be used in the field. Ten-plant samples were taken at 2-day intervals beginning approximately 8 weeks after emergence to determine seed dry weight accumulation and number of green, yellow, and brown pods. In order to identify a stage of pod development which coincided with maximum accumulation of seed dry weight, the number of green, yellow and brown pods per plant was estimated with polinomial regression equations. Coefficients of determination for the number of yellow pods were relatively low, ranging from 0.52 to 0.77, whereas the coefficients of determination for most equations for green and brown pod numbers were near 0.9, indicating that the number of both green and brown pods may be useful as indicators of the occurrence of physiological maturity. Physiological maturity of L-227 occurred when plants had developed 1 to 2 green pods and 12 to T4 brown pods, whereas physiological maturity of RAB 205 occurred when 2 green pods and 8 brown pods were present on each plant. In the field, the number of green pods would be a better visual indicator of physiological maturity than the number of brown pods because fewer green pods have to be counted and because the green pods are on top of the plant.Dos líneas indeterminadas de habichuela, L-227 y RAB 205, se sembraron en dos estaciones del año para identificar un indicador visual de la etapa de madurez fisiológica que pudiera usarse en el campo. Muestras de 10 plantas se tomaron cada 2 días para determinar la acumulación de materia seca en el grano y el número de vainas verdes, amarillas y secas. Se usaron ecuaciones de regresión lineales, cuadráticas y cúbicas para determinar el número de vainas verdes, amarillas y secas que coincidian con el punto de máxima acumulación de peso seco en el grano. Los coeficientes de determinación para el número de vainas amarillas fueron relativamente bajos; variaron de 0.52 a 0.77. Por otro lado, la mayoría de los coeficientes de determinación para las ecuaciones del número de vainas verdes y de secas fueron cercanos a 0.9, lo que indica que tanto el número de vainas verdes como el de vainas secas podían ser buenos indicadores de madurez fisiológica. La madurez fisiológica de L-227 ocurrió cuando a las plantas les quedaban de 1 a 2 vainas verdes y tenían de 12 a 14 vainas secas. La madurez fisiológica de RAB 205 ocurrió cuando las plantas tenían 2 vainas verdes y 8 vainas secas. Estos resultados indican que el número de vainas verdes, en condiciones de campo, podría ser un mejor indicador de la madurez fisiológica que el número de vainas secas, no solamente porque habrá menos vainas verdes que contar, sino porque las verdes estarían en la parte superior de la planta

Integrating a Global Induction Mechanism into a Sequent Calculus

Most interesting proofs in mathematics contain an inductive argument which requires an extension of the LK-calculus to formalize. The most commonly used calculi for induction contain a separate rule or axiom which reduces the valid proof theoretic properties of the calculus. To the best of our knowledge, there are no such calculi which allow cut-elimination to a normal form with the subformula property, i.e. every formula occurring in the proof is a subformula of the end sequent. Proof schemata are a variant of LK-proofs able to simulate induction by linking proofs together. There exists a schematic normal form which has comparable proof theoretic behaviour to normal forms with the subformula property. However, a calculus for the construction of proof schemata does not exist. In this paper, we introduce a calculus for proof schemata and prove soundness and completeness with respect to a fragment of the inductive arguments formalizable in Peano arithmetic.Comment: 16 page

Volatile profile and consumer acceptability of natural yoghurts elaborated with chilean native cultures of enterococcus sp. strain BB3 and lactobacillus sp. strain BB6

According to WHO, in 2016 around 13% of the world's adult population (11% of men and 15% of women) were obese. The global prevalence of obesity almost tripled between 1975 and 2016. In this context, it is important to note that the continuous increase in life expectancy, the desire for a better quality of life, and the high cost of medical care have led to a growing demand for functional foods in the market. People have started to realize that their food choices and their unhealthy lifestyles have consequences for their health. An important role in this scenario is associated with functional foods containing probiotic strains, reported to benefit human health. Here we report the development of natural yogurts based on native probiotic starter cultures of Enterococcus sp. strain BB3 (MK681869) and Lactobacillus sp. strain BB6 (MK681868), isolated from raw cow milk of La Araucanía region of Chile. The odor and taste were the main parameters criticized by the consumer, the analysis of CG-MS elucidated that the yogurt produced by the strain Enterococcus sp. strain BB3 (MK681869) produced a higher amount of heptan-2-one, associated with a cheesy type odor, with less acceptance by the consumers. The acceptability of 6 types of yogurt was evaluated with a randomized analysis of 60 participants. The development of a functional dairy product based on probiotics is of interest because of its relation with positive changes in gut microbiota, and at the same time with a possible decrease in body weight

Bonding mechanism and magnetic ordering in Laves phase λ1−MgCo2 intermetallic compound from theoretical and experimental studies

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Estabilidad del rendimiento de algunos genotipos de habichuela en Honduras

Bean (Phaseolus vulgaris L.) cultivars are grown under diverse environmental conditions in Central America because of geography, multiple growing seasons and variable inputs. The regression of mean genotype yields onto mean environment yields may provide useful information for selecting beans with greater yield stability when grown under these conditions. The principal objective of this research was to test yield stability of bean cultivars and promising breeding lines across a range of environments representative of the bean growing regions of Honduras. In 1984, 25 cultivars/breeding lines of various origins were grown in 23 field trials in Honduras. The trials were conducted during two seasons and in three different departments. Stability was examined on the basis of mean square deviations (MSD) from regression, large rank order changes among mean seed yield of genotypes were evident when different seasons and departments were compared. A highly significant correlation of the regression slope (b) with mean genotype yield supported use of MSD to assess yield stability. Mean yield and MSD were not correlated. The two determinate cultivars in the trial had poor stability characteristics. Honduran varieties had greater yield and better stability characteristics than most entries in the trial. Black-seeded lines 'B-190', '3B-5-1' and '8325-7' had high mean yield and good stability characteristics. These results show the importance of testing for yield stability if a cultivar is to be released for use in different regions and seasons in Central American countries. Also high yield and stability, judged on the basis of MSD, can occur in the same genotype.Varias cultivares de habichuela (Phaseolus vulgaris L.) se sembraron en América Central en una variedad de condiciones ambientales debido a la geografía de las áreas de siembra y a las diversas estaciones de crecimiento a lo largo de todo el año. Las regresiones de los promedios de rendimiento de los genotipos y de los rendimientos medios por ambiente pueden proveer información valiosa para seleccionar líneas con una mejor estabilidad de rendimiento. El objetivo principal de esta investigación fue estudiar la estabilidad de rendimiento de cultivares y líneas de mejoramiento de habichuela con características prometedoras para autorizar su uso en tres áreas productoras de habichuela de Honduras. Los experimentos se sembraron durante dos épocas de siembra en tres departamentos del país. La estabilidad de rendimiento se determinó a partir de las desviaciones del cuadrado medio (MSD). De las regresiones se pudo observar grandes cambios en el orden de los genotipos cuando se compararon las épocas y los lugares de siembra. Una correlación altamente significativa entre la pendiente de regresión y el promedio de rendimiento por genotipo respalda el uso del método de las MSD para estudiar estabilidad de rendimiento. El promedio de rendimiento y las MSD no estuvieron correlacionados. Las dos cultivares determinadas incluidas en los exprerimentos presentaron características pobres de estabilidad. De las cuatro variedades de Honduras, dos de ellas tuvieron mejores rendimientos y estabilidad que la mayoría de las cultivares incluidas en los experimentos. Las líneas negras B-190, 3B-5-1 y 8325-7 presentaron buena estabilidad y excelentes promedios de rendimiento. Estos resultados muestran la importancia que tiene estudiar la estabilidad de rendimiento de una cultivar de frijol que se autoriza para sembrarse en diferentes regiones y estaciones de siembra de los países centroamericanos y también nos indica que y los altos rendimientos y la estabilidad medidos a base de las MSD pueden estar presentes en el mismo genotipo

Factors affecting farmers’ adoption of natural farming technologies in New Albay, Maragusan, Compostela Valley, Philippines

In the Philippines, the sustainability of natural resources and the profitability of farming has become a major concern for smallholder farmers. To address these concerns, government agencies and the private sector are delivering workshops on natural farming technologies to farmers. Training includes the preparation of different concoctions such as indigenous micro-organisms (IMO), fermented fruit juice (FFJ) and fermented plant juice (FPJ), fish amino acid (FAA), oriental herbal juice (OHN) and calcium phosphate (Caphos). Other natural farm technologies include vermiculture. The products from the training are applied to the farmer’s own farms with any surplus products sold to other farmers. In Maragusan, Compostela Valley, Philippines, a group of smallholder farmers have successfully produced organic fertilizers as a result of the training provided to them. Initially, while training was provided to the group to facilitate the marketing of the fresh vegetable crops they produced, the skills learnt were readily transferable. This study discusses the development of the New Albay cluster and factors leading to its decline as a marketing cluster. This study will also explore the costs and returns associated with the application of organic fertilizer to vegetable crops in comparison to conventional farming practices. Results show that the cost of production arising from the use of natural farming technologies is lower than conventional farming

Social connections and smallholder vegetable farmers’ collaborative marketing strategy: The case of the small farmers association of Quirogpang in Davao City, the Philippines

In the Philippines, vegetable farmers generally have only small land holdings. Because of this, plus an apparent lack of financial capital, it is difficult for smallholder farmers to meet the large volume demands imposed by institutional buyers and wholesalers. The small volume and the large variation in quality puts smallholder farmers at a significant disadvantage when it comes to arranging transport and marketing. However, smallholder farmers can engage in collaborative cluster farming in order to meet the demands of the market and to bolster production volume. In the cluster, the farmers carry out production planning and marketing activities collectively. Utilizing the case study method and the 8-step clustering approach formulated by the Catholic Relief Services, this paper will present key success factors and several challenges faced by the Small Farmers Association of Quirogpang (SFAQ) in Marilog, Davao City, Philippines. At the same time, it will identify important institutional supports and strategies that may enhance the success of this and other clusters. The paper highlights key success factors such as the social connections shared by the cluster members and leadership. In this case, these commonalities exist because it is an area-based cluster which includes neighbours and relatives who all practice one religion and speak the same language or dialect

A Screen of FDA-Approved Drugs Identifies Inhibitors of Protein Tyrosine Phosphatase 4A3 (PTP4A3 or PRL-3)

Protein tyrosine phosphatase 4A3 (PTP4A3 or PRL-3) is highly expressed in a variety of cancers, where it promotes tumor cell migration and metastasis leading to poor prognosis. Despite its clinical significance, small molecule inhibitors of PRL-3 are lacking. Here, we screened 1443 FDA-approved drugs for their ability to inhibit the activity of the PRL phosphatase family. We identified five specific inhibitors for PRL-3 as well as one selective inhibitor of PRL-2. Additionally, we found nine drugs that broadly and significantly suppressed PRL activity. Two of these broad-spectrum PRL inhibitors, Salirasib and Candesartan, blocked PRL-3-induced migration in human embryonic kidney cells with no impact on cell viability. Both drugs prevented migration of human colorectal cancer cells in a PRL-3 dependent manner and were selective towards PRLs over other phosphatases. In silico modeling revealed that Salirasib binds a putative allosteric site near the WPD loop of PRL-3, while Candesartan binds a potentially novel targetable site adjacent to the CX5R motif. Inhibitor binding at either of these sites is predicted to trap PRL-3 in a closed conformation, preventing substrate binding and inhibiting function