bluuebunny/crossref_metadata_2025 huggingface dataset:
Embryonic development of identified neurons: segment-specific differences in the H cell homologues
Authors: Bate M , Goodman CS , Spitzer NC
Published: March 2018

Although all of the segmental ganglia of the grasshopper come from identical sets of embryonic precursor cells, there are striking differences in the number and properties of the neurons in the mature ganglia. In every segment, midline precursor 3 (MP3) divides once and gives rise to two progeny. We describe the fate of the two MP3 progeny in different segments. The morphology, physiology, and survival of the MP3 progeny depend upon their segmental position in the embryo. In the meso- and metathoracic segments (T2 and T3), one of the two progeny of MP3 transforms into the H cell. In many of the abdominal segments, beginning with the fourth (A4), both MP3 progeny die. A gradient of transformation and cell death is seen in the intervening first three abdominal segments (A1 to A3). From A1 to A3, the MP3 progeny acquire fewer of the morphological phenotypes of the H cell. This is paralleled by the partial acquisition of the physiological phenotypes of the H cell. Thus, cells that are the progeny of the same precursor cell in different segments can either live or die and, if they survive, can develop different morphological and physiological properties.
Study of the influence of surface-active substances on the initial stage of copper electrodeposition
Authors: Dalbanbay Amantay , Nefedov Aleksandr , Nurmanova Roza , Nauryzbayev Mikhail
Published: March 2018

In this research, the effect of surface-active substances (CMC and DFP) on the electrolysis of copper by cyclic voltammetry (CVA) and chronoamperometric methods was studied. The working electrode was a glassy carbon electrode. Studies show that in the acid solution of copper sulfate (10-2 M CuSO4 + 0.5 M H2SO4), the three-dimensional electrochemical deposition of copper occurs by the mechanism of instantaneous nucleation. The added surface active substances affect the dischargeionization process, the standard electroreduction potential is shifted to the negative side. The added DFP reduces the cathodic peak current, and the addition of CMC results in its increase. At the deposition potentials corresponding to the regions up to the CVA peak current (here, still, the mixed electrodeposition kinetics), the number of nuclei formed is greater for a pure solution, but at current decay potentials, where the diffusion regime takes place, the nuclei population density (NPD) is higher for solutions with surfactants. The most powerful effect here is caused by the addition of DFP. In the case of mixed additives, the NPD values are close to those of the CMC, obviously indicating the preferential adsorption of CMC, whereas the DFP as complexes with copper ions is closer to the near-electrode region.
Development of the technology for obtaining new hydrogel materials based on acrylic monomers
Authors: Nurabay Nazerke , Abutalip M. , Rakhmetullayeva Raikhan , Mun Grigoriy
Published: March 2018

Smart water-soluble polymers and hydrogels are capable to reversibly react to insignificant changes of the medium properties (pH, temperature, ionic strength, a presence of some substances, illumination, electric field). The reacting of a system is visible to the naked eye (the formation of a new phase in a homogeneous solution, or compression of the hydrogel). The properties of such polymers and hydrogels are considered. For the first time, the stimuli-responsive polymeric hydrogels based on N-isopropylacrylamide (NIPAAM), 2-hydroxyethyl acrylate (HEA) and acrylic acid (AA) have been synthesized by free initiation of radical copolymerization. The purpose of the research is to obtain stimuli-responsive cross-linked terpolymers based on N-isopropylacrylamide, 2-hydroxyethyl acrylate and acrylic acid and study their physicochemical properties. The physicochemical methods such as scanning electron microscopy, differential scanning calorimetry, infrared spectroscopy, gravimetry, cathetometric and thermogravimetric analyses were used in this study. To determine the thermal and pH – sensitivity of the modified copolymer, the effect of temperature on the NIPAAM-НEA-AA nets (in different pH media) was studied. They are characterized by a thermally induced collapse and a dependence on a medium pH. The interaction of copolymers with drugs such as lincomycin and gentamicin was studied for using the new copolymers as a drug carrier. To study the antibacterial properties and the transportation of physiologically active substances of hydrogel, the elimination of specially prepared bacteria by hydrogels with various medicinal ingredients were conducted.
Teleost Fish-Specific Preferential Retention of Pigmentation Gene-Containing Families After Whole Genome Duplications in Vertebrates
Authors: Lorin Thibault , Brunet Frédéric G , Laudet Vincent , Volff Jean-Nicolas
Published: March 2018

Vertebrate pigmentation is a highly diverse trait mainly determined by neural crest cell derivatives. It has been suggested that two rounds (1R/2R) of whole-genome duplications (WGDs) at the basis of vertebrates allowed changes in gene regulation associated with neural crest evolution. Subsequently, the teleost fish lineage experienced other WGDs, including the teleost-specific Ts3R before teleost radiation and the more recent Ss4R at the basis of salmonids. As the teleost lineage harbors the highest number of pigment cell types and pigmentation diversity in vertebrates, WGDs might have contributed to the evolution and diversification of the pigmentation gene repertoire in teleosts. We have compared the impact of the basal vertebrate 1R/2R duplications with that of the teleost-specific Ts3R and salmonid-specific Ss4R WGDs on 181 gene families containing genes involved in pigmentation. We show that pigmentation genes (PGs) have been globally more frequently retained as duplicates than other genes after Ts3R and Ss4R but not after the early 1R/2R. This is also true for non-pigmentary paralogs of PGs, suggesting that the function in pigmentation is not the sole key driver of gene retention after WGDs. On the long-term, specific categories of PGs have been repeatedly preferentially retained after ancient 1R/2R and Ts3R WGDs, possibly linked to the molecular nature of their proteins (e.g., DNA binding transcriptional regulators) and their central position in protein-protein interaction networks. Taken together, our results support a major role of WGDs in the diversification of the pigmentation gene repertoire in the teleost lineage, with a possible link with the diversity of pigment cell lineages observed in these animals compared to other vertebrates.
The Sensitivity of Residential Electricity Demand in Indonesia
Authors: Kusumaningrum Stranti Nastiti
Published: March 2018

Since 2013, the residential electricity price for High VA (Volt-Ampere) households has changed due to changes in pricing policies. This paper analyzes the responsiveness of residential electricity demand to the change in electricity prices and income among two different household groups (Low VA and High VA) in 2011 and 2014. Using an electricity consumption model and the Quantile Regression method, the results show that residential electricity demand is price and income inelastic. Income elasticity is lower than price elasticity. Furthermore, the effects on price elasticity also found in the Low VA group, whose rate remained stable. At the same time, evidence proves the impact of the change in pricing policy on income elasticity remains unclear. This result implies that the government has to be more careful in regulating electricity prices for the low VA group, while maintaining economic stability.DOI: 10.15408/sjie.v7i2.6048
The Effects of Minimum Wage Throughout the Wage Distribution in Indonesia
Authors: Dewi Sri Gusvina
Published: March 2018

The global financial crisis in 2007 followed by Indonesia’s largest labor demonstration in 2013 encouraged turmoils on Indonesia labor market. This paper examines the effect of the minimum wage on wage distribution in 2007 and 2014 and how the minimum wage increases in 2014 affected the distribution of wage differences between 2007 and 2014. This study employs recentered influence function (RIF) regression method to estimate the wage function by using unconditional quantile regression. Furthermore, to measure the effect of the minimum wage increase in 2014 on the distribution of wage differences, it uses the Oaxaca–Blinder decomposition method. Using balanced panel data from the Indonesian Family Life Survey (IFLS), it found that the minimum wage mitigates wage disparity in 2007 and 2014. The minimum wage policy in 2014 leads to an increase in the wage difference between 2007 and 2014, with the largest wage difference being in the middle distribution.DOI: 10.15408/sjie.v7i2.6125
Tax Revenue and Economic Growth: A Study of Nigeria and Ghana
Authors: Egbunike Francis Chinedu , Emudainohwo Ochuko Benedict , Gunardi Ardi
Published: March 2018

Tax revenue is frequently considered as an alternative form of sustainable financing within a stable and predictable fiscal environment to promote growth and enable governments to finance their social and infrastructural needs. The objective of the study is to examine the effect of tax revenue on economic growth of Nigeria and Ghana. The study used multiple regressions as tools of analysis. The study finds a positive impact of tax revenue on the gross domestic product of Nigeria and Ghana confirming prior studies. The study recommended among others that adequate measure to ensure that revenue generated from the tax is effectively utilized to develop and grow the economy.DOI: 10.15408/sjie.v7i2.7341
The Determinant of Participation in The Social Activities: Case in Indonesia
Authors: Kharisma Bayu
Published: March 2018

One of the most issues debated in the social capital literature is the unconditional cash transfer effect on social capital, especially regarding the potential of unmeasured targeted mechanisms at the community level about social relations. This article aims to identify the determinant of social capital in the form of household participation in social activities and the impact of unconditional cash transfers (BLT) on participation in social activities in Indonesia by using differences-differences approach (DID). The results showed that the most influential factor on household participation in social activities is the education level of the head of the household and the members of the productive age group. Meanwhile, unconditional cash transfers policy has a positive effect on the rotating saving and credit association. Thus, participation in social activities undertaken by the community undoubtedly has an important element in the success of government programs.DOI: 10.15408/sjie.v7i2.7365
Projective Gravity
Authors: Kalmbach H.E. Gudrun
Published: March 2018

In [1]  and [3] it was pointed out that octonians can replace an infinite dimensional Hilbert space and psi-waves descriptions concerning the states of deuteron which are finite in number. It is then clear that gravity needs projective and projection geometry to be described in a unified way with the three other basic forces of physics.
The Effect of Leadership Style to Job Satisfaction, Employee Engagement and Employee Performance (Study at PT. Interbat, Bali, Nusra, and Ambon)
Authors: Kertiriasih Ni Nengah Rupadi , Sujana I Wayan , Suardika I Nengah
Published: March 2018

Human resources as one of the important indicators of achieving organizational goals effectively and efficiently and performance is the answer to the success or failure of organizational goals that have been set. Performance can be seen from the achievement of target employees in an organization. Performance at PT.Interbat Bali Nusra Ambon has decreased in 2017 compared to 2016. The purpose of this research is to confirm the linkage of leadership style to job satisfaction, employee engagement and employee performance of PT.Interbat Bali Nusa Ambon. The population and sample in this study is the total population of 53 employees. The analysis technique used in this research is structural equation modeling (SEM) based on variance or component based SEM, known as Partial Least Square (PLS). From the research result, it is found that leadership style has positive and significant effect to job satisfaction, leadership style has no significant effect on employee engagement, leadership style has no significant effect on employee performance, but leadership style will affect employee's work through work mediation and employee engagement, job satisfaction positive and significant impact on employee engagement, employee engagement has a positive and significant impact on employee performance and employee engagement has a positive and significant impact on employee performance.
Effect of Customer Relationship Management on Customer Satisfaction and Loyalty at Pt. Harmoni Permata Gianyar, Bali
Authors: Laksmana I Nyoman Hendra , Kusuma IGA Eka Teja , Landra I Nengah
Published: March 2018

A highly competitive market makes companies need to maintain a positive relationship with their customers. A good CRM (customer relationship management) program will help the company to satisfy its customers. This research will explore various methods and techniques to build effective customer relationship management to satisfy customers. The purpose of this study is to examine the effectiveness of customer relationship management in maintaining and satisfying customers. This research shows that customer relationship management has a significant effect on customer satisfaction and loyalty. The variable also has a positive relationship. The company makes CRM as a capital to make customers more satisfied and stick with the company. This study concludes that CRM plays a major role in improving customer satisfaction, deep customer knowledge and customer loyalty. A better CRM will have clear information about what customers want, what their needs are, and what will make them more satisfied.
Effect of Leadership and Competency to Employee Performance Employee Loyalty Dimedization (Study on Sector Lighting and Sound System Denpasar)
Authors: Suarmiati Ni Made , Sujana I Wayan , Sapta I Ketut Setia
Published: March 2018

Company Sector Lighting & Sound System Denpasar as an event organizer company (EO) has set standard operating procedure (SOP) . But in reality there are still many employees who have not been able to apply the standard operating procedure (SOP) is well, it is marked from the quality of work set not appropriate and cause complain from the user . Disobedience of employees characterized by decreased sense of devotion and decrease the sense of responsibility of employees causing a trans are conducive decline in employee loyalty. The research was conducted at Sector Lighting & Sound System Denpasar with 45 samples as determined by census method. This research uses Partial Least Square (PLS) analysis . The results showed that leadership and competence have a positive effect on the loss of employees. Leadership and competence have a positive effect on employee performance.Loyalty capable of providing leadership influence on employee performance and the influence of competence on employee performance.
Tourism Industry in a Depressed Economy: Agenda for Firms’ Survival Behaviour
Authors: Eketu Dr. Continue Anddison , Dan-Jumbo Comfort
Published: March 2018

The paper examines the survival behavior of firms in the tourism industry in the context of business environmental hostilities of a depressed economy, as the case in Nigeria. It adopts a descriptive and prescriptive approach on characteristics of the tourism industry and also on the depressed state of the Nigerian economy, to prescribe survival behavior of firms. It contended that the tourism industry provides psycho- social luxury, thus almost only attends to the psychological and social ostentability of the customer. Also, it views the depressed economy as characterized by economic hardship, which tends to restrict spending, dominantly on economic rationality. This places the services of firms in the tourism industry on marginal consideration mostly on household spending during economic depression. The attendant survival tendency of the firm thus becomes critical. The paper therefore prescribed a broad spectrum of strategies bordering on cost, price, service and promotion restructuring to enhance firms’ resilience.
A Bordetella pertussis-antitestek szeroprevalenciája magyarországi felnőttekben
Authors: Torzsa Péter , Raghavendra Devadiga , Tafalla Monica
Published: March 2018

Abstract:

Introduction: Pertussis (whooping cough) is an acute respiratory tract infection caused by Bordetella pertussis that is characterized by a chronic, severe cough. The optimum immunization schedule for pertussis is unclear, so these vary by countries. Aim: To estimate the seroprevalence of pertussis in adults in Hungary. Method: Serum anti-pertussis toxin immunoglobulin G (anti-PT IgG) antibody levels were analyzed using enzyme-linked immunosorbent assay in adults in general practitioners’ practices during one year. Sera were classified following manufacturer’s instructions as: strongly indicative of current/recent infection (≥1.5 optical density [OD] units); indicative of current/recent infection (≥1.0 OD units); seropositive (>0.3 OD units); or seronegative (≤0.3 OD units). Results: 1999 adults (60.6% female; mean age 47.4 ± 17.7 years) were included. 14.8% were seropositive, 1.1% were indicative of current/recent infection, and 0.1% were strongly indicative of current/recent infection. Conclusions: 85.2% of the subjects were seronegative and therefore susceptible to pertussis infection. Approximately 1% was suspicious of current/recent pertussis infection, potentially transmissible to susceptible young infants. Vaccination of adults is a key way to indirectly protect infants. Orv Hetil. 2018; 159(13): 503–510.
Rendszer az egészségügyi weboldalak hitelesítésére
Authors: Horváth Tamás , Matics Katalin , Meskó Bertalan
Published: March 2018

Abstract:

Introduction and aim: The unreliable quality of online health contents poses a serious challenge to the medical profession. Evaluating websites on the basis of their credibility increases the chance for readers to access professional content of better quality. Hungary still lags behind in taking practical steps to improve the quality and reliability of online patient education. Method: EgészségKommandó (HealthCommando) is a new Hungarian objective scoring system established to evaluate the credibility of health related websites. It uses four types of indicators: transparency, content, recommendations, references. Results: We evaluated 122 websites with EgészségKommandó. Out of this, 22.1% qualified as credible. The same assessment using JAMA benchmarks yielded only one credible website (0.8%). The most frequent deficiencies were the absence of reference to source, the omission of the quote that “the website information does not replace the doctor-patient discussion”, and the identity of the author. In 45.9% of the cases, however, the content was written by medical professionals with contact information. Conclusion: By applying different types of credibility and quality indicators in a scoring system, EgészségKommandó can efficiently assess the websites on health-awareness. In cases where the recognized indicators are absent multiple times from a website, it will not pass the credibility test. Thus, EgészégKommandó can act as a filter. At the same time, EgészségKommandó is also capable of assessing webpages of different sorts systemically, and can recommend a proportionately large amount of reliable Hungarian medical web resources to those interested. Orv Hetil. 2018; 159(13): 511–519.
A gyermekkori malignus kórképek kemoterápiájának leggyakoribb mellékhatása, az oralis mucositis. Irodalmi áttekintés
Authors: Nemes Judit , Jenei Ágnes , Márton Ildikó
Published: March 2018

Abstract:

Mucositis is the most common oral complication of cancer therapy. Oral mucositis in childhood is more frequent and severe compared to adults, especially in children with leukemia. Lesions develop as the chemotherapeutic agents attack the rapidly dividing cells of the oral mucous membrane. Patients may experience trouble in eating, drinking, swallowing or even speaking due to the significant pain caused by the ulceration of the oral mucosa. Oral mucositis has a direct impact on the quality of life and may affect survival. The regular assessment of the oral mucosa is crucial during chemotherapy to evaluate the effectiveness of the oral mucositis prevention and treatment. Several oral mucositis scoring tools have been developed for adults to qualify the symptoms, but there is no universally accepted assessment scale for children. The prevention and treatment of therapy-related mucositis is difficult, though several methods and pharmacologic agents have been tested. Here we discuss the pathogenesis of chemotherapy-induced oral mucositis, the available assessment tools and their applicability to pediatric patients and the available therapeutic and preventive strategies. Orv Hetil. 2018; 159(13): 495–502.
Determining criteria for optimal site selection for solar power plants
Authors: Kereush Daria , Perovych Igor
Published: March 2018

Site selection is one of the basic vital decisions in the start-up process, expansion or relocation
of businesses of all kinds. Construction of a new industrial system in the form of solar photovol�taic power plant is a major long-term investment, and in this sense determining the location is
critical point on the road to success or failure of industrial system. One of the main objectives in
industrial site selection is finding the most appropriate site with desired conditions defined by
the selection criteria. This work suggests how to define and classify particular criteria considered
for solar PV farm siting. Multi-criteria decision analysis (MCDA) is proposed as a method to
process available technical information to support decisions in many fields, especially in envi�ronmental decision making. In some cases, due to the lack of reliable information on the im�pact of various natural factors on the economic activity related to the use of land resources, the
method of expert assessments can be used. The peculiarity of this method is the lack of empirical
evidence of the influence of a given factor on the final result of decision-making. In this case
the value of separate factor is judged by experts. When applying this method, expert groups
are formed of leading specialists, the main influence factors is established, a questionnaire and
a scale of criteria are compiled. Level of reliability of the results is assessed by the coefficient of
concordance.
Methodological and technological aspects of 3D modelling of historic memorials and statues in order to document and preserve objects of cultural heritage
Authors: Kuzyk Zoryana , Berdar Fedir
Published: March 2018

The article deals with the main aspects and contemporary methods in 3D modelling of histori�cal memorial structures in order to preserve objects of cultural heritage. Results of experiments
using various combinations of software and technology have been presented: geographic infor�mation systems, ground laser scanning and computer graphics programs for rendering. On the
basis of comparison between these methods and technologies, conclusions have been drawn,
and recommendations for their application in the field of heritage preservation have been given.
Rural land management in Bangladesh: problems and prospects
Authors: Masum Fahria
Published: March 2018

Based on a theoretical discussion from global perspective the paper describes present rural land
administration and management structure in Bangladesh. Bangladesh is a land scarce country
with high-density population. As most of the people live in rural areas and depend on agri�culture and allied activities, proper rural land management is crucial. The paper presents an
overall view of rural land management in Bangladesh and reveals that the current land manage�ment system is almost obsolete. Land administration system is conventional and characterised
by inefficiency and corruption. Some of the major problems facing the country in managing
rural land are: outdated and inadequate land related policies and land laws, inequality of land
ownership and landlessness, as well as increasing conflicts over land. The study also looks at
some potential measures taken by the government to improve the country’s land administration
and management system. Finally the paper provides a set of guidelines to deal with present land
management challenges.
The role of surgery in primary central nervous system lymphomas
Authors: Villalonga Juan Francisco , Alessandro Lucas , Farez Mauricio Franco , Mormandi Rubén , Cervio Andrés , Alcorta Santiago Condomí , Muggeri Alejandro
Published: March 2018

ABSTRACT Background Primary central nervous system lymphomas (PCNSL) are infrequent. The traditional treatment of choice is chemotherapy. Complete resections have generally not been recommended, because of the risk of permanent central nervous system deficits with no proven improvement in survival. The aim of the current study was to compare survival among patients with PCNSL who underwent biopsy versus surgical resection. Methods A retrospective study was conducted on 50 patients with a confirmed diagnosis of PCNSL treated at our center from January 1994 to July 2015. Results Patients in the resection group exhibited significantly longer median survival time, relative to the biopsy group, surviving a median 31 months versus 14.5 months; p = 0.016. Conclusions In our series, patients who had surgical resection of their tumor survived a median 16.5 months longer than patients who underwent biopsy alone.
Association between executive and food functions in the acute phase after stroke
Authors: Mourão Aline Mansueto , Vicente Laélia Cristina Caseiro , Abreu Mery Natali Silva , Chaves Tatiana Simões , Sant'Anna Romeu Vale , Braga Marcela Aline Fernandes , Meira Fidel Castro Alves de , de Souza Leonardo Cruz , Miranda Aline Silva de , Rachid Milene Alvarenga , Teixeira Antônio Lucio
Published: March 2018

ABSTRACT Purpose To investigate potential associations among executive, physical and food functions in the acute phase after stroke. Methods This is a cross-sectional study that evaluated 63 patients admitted to the stroke unit of a public hospital. The exclusion criteria were other neurological and/or psychiatric diagnoses. The tools for evaluation were: Mini-Mental State Examination and Frontal Assessment Battery for cognitive functions; Alberta Stroke Program Early CT Score for quantification of brain injury; National Institutes of Health Stroke Scale for neurological impairment; Modified Rankin Scale for functionality, and the Functional Oral Intake Scale for food function. Results The sample comprised 34 men (54%) and 29 women with a mean age of 63.6 years. The Frontal Assessment Battery was significantly associated with the other scales. In multivariate analysis, executive function was independently associated with the Functional Oral Intake Scale. Conclusion Most patients exhibited executive dysfunction that significantly compromised oral intake.
Caracterização química de compostos e vermicompostos produzidos com casca de arroz e dejetos animais
Authors: Vione Elaine Luiza Biacchi , Silva Leandro Souza da , Cargnelutti Filho Alberto , Aita Natália Tobin , Morais Alexssandro de Freitas de , Silva Allan Augusto Kokkonen da
Published: March 2018

RESUMO Dejetos animais representam importantes fontes de nutrientes para as plantas; entretanto, necessitam de estabilização para evitar contaminação ambiental. Juntamente com a casca de arroz, podem ser usados em compostagens e vermicompostagens e reinseridos no sistema produtivo. Neste estudo, foram elaborados compostos e vermicompostos com casca de arroz e dejetos de aves, bovinos e suínos, que, após estabilização biológica, foram avaliados quanto à composição química e fracionamento de fibras, relacionando-se com sua adequação ao uso agrícola e seu potencial fertilizante. A redução do teor de C e da relação C/N e o aumento da relação CTC/C dos compostos e vermicompostos indicaram que os processamentos favoreceram a degradação dos resíduos orgânicos e sua estabilização. Os dejetos afetam a composição, sendo que maiores teores de P, Ca e Mg foram obtidos nos materiais com dejetos de aves (1%, 4,9% e 1,6%, respectivamente). Os compostos e vermicompostos apresentaram composições similares, exceto para CE (redução de 1,6 para 0,5 dS.m-1 em vermicompostagem, na média dos três dejetos) e nos teores de K (redução de 1,8 para 0,6%, em vermicompostagem com dejeto de aves), provavelmente pela lixiviação durante o processo. Houve maior fração solúvel (61,5%) e menores teores de celulose (9,3%) e lignina (7,2%) no composto e vermicomposto com dejeto bovino, o que poderá favorecer a liberação de N para as plantas na decomposição desse material. Os dejetos de aves, bovinos e suínos resultaram em compostos maturados e vermicompostados com características químicas diferentes, sendo que os maiores teores de P, Ca e Mg foram observados nos materiais produzidos com dejetos de aves. Conclui-se que os compostos e vermicompostos produzidos poderiam ser utilizados em substituição aos fertilizantes minerais e as quantidades a serem aplicadas devem ser ajustadas em função de sua composição específica.
Potencial fertilizante da serapilheira de espécies lenhosas da Caatinga na recuperação de um solo degradado
Authors: Primo Anacláudia Alves , Melo Maria Diana , Pereira Graziella de Andrade Carvalho , Silva Ludmyla Araújo , Fernandes Francisco Éden Paiva , Souza Henrique Antunes de
Published: March 2018

RESUMO O uso da serapilheira de espécies da Caatinga, na recuperação de solos degradados, é uma alternativa interessante, por contribuir para o retorno de nutrientes para o solo e favorecer a ciclagem de elementos e a melhoria da fertilidade. Objetivou-se, com este trabalho, mensurar os efeitos da aplicação de doses da fração folhas, da serapilheira de oito espécies da Caatinga, sobre a fertilidade de um solo degradado e a produção de sorgo. Adotou-se delineamento em blocos casualizados, com cinco tratamentos e cinco repetições, com doses de serapilheira, equivalentes a 0, 15, 30, 60 e 120 kg ha-1 de N, por espécie. O experimento foi conduzido em casa de vegetação, utilizando-se um Planossolo Nátrico Órtico coletado em área degradada do município de Irauçuba, CE. Coletaram-se folhas, sem sinal de decomposição, de Combretum leprosum Mart., Mimosa caesalpiniifolia Benth., Mimosa tenuiflora (Willd.) Poir., Libidibia ferrea (Mart. ExTul.) L.P. Queiroz, Poncianella piramydalis (Tul.) L.P. Queiroz, Aspidosperma pyrifolium Mart, Cordia oncocalyx Allemão e Croton sonderianus Muell. Arg. Aos 75 dias após a germinação, realizou-se o corte das plantas, sua secagem e a quantificação da matéria seca e a análise de N-total e do acúmulo de N. A amostragem do solo foi feita após o corte do sorgo. O incremento das doses dos resíduos de mofumbo, jucá, catingueira, pereiro e pau-branco elevou as concentrações de P, K, Ca e Mg, o resíduo de marmeleiro acidificou o solo. Jurema e pau-branco elevaram a produção de biomassa do sorgo e o acúmulo de N.
Bacillus subtilis no tratamento de mudas de bananeira infectadas por fitonematoides
Authors: Araújo Jardel Jean da Silva , Muniz Maria de Fátima Silva , Moura Filho Gilson , Rocha Fernando da Silva , Castro José Mauro da Cunha e
Published: March 2018

RESUMO A utilização de material propagativo sadio constitui importante medida de controle para os nematoides da bananeira (Musa spp.), pois, assim, evita-se a introdução desses patógenos em áreas isentas. O objetivo deste trabalho foi avaliar o efeito da aplicação de Bacillus subtilis (Nemathel®) no tratamento de mudas, do tipo chifre, de bananeira subgrupo Terra cv. Comprida, infectadas por uma população mista com Radopholus similis, Meloidogyne spp., Pratylenchus spp. e Helicotylenchus spp. Foram testadas diferentes doses do produto (50; 100; 150; 200 e 250 mL/10 L de água) mais as testemunhas positiva (nematicida) e negativa (água). As mudas foram imersas em cada um dos tratamentos por 30 minutos e plantadas em vasos com solo esterilizado. A avaliação foi realizada após quatro meses e as doses de 200 e 250 mL do produto por 10 L de água proporcionaram as maiores reduções das populações dos nematoides em raízes e rizomas.
Aproveitamento de escória de siderurgia em substratos alternativos para produção de mudas de pimenteira Dedo-de-moça
Authors: Oza Eduardo France , Monaco Paola Alfonsa Vieira Lo , Santos Millena Monteiro dos , Rosado Thiago Lopes , Krause Marcelo Rodrigo , Garcia Willian Alves
Published: March 2018

RESUMO Estudos relacionados com o aproveitamento de escória de siderurgia tornaram-se imprescindíveis, pela possibilidade de seu uso como componente de substratos na produção de mudas e por esse uso minimizar o risco de contaminação ambiental, decorrente do descarte inadequado. Assim, objetivou-se, com este trabalho, avaliar o efeito de níveis crescentes de escória de siderurgia em substratos, compostos por solo com esterco bovino curtido e areia, nas variáveis de crescimento e na qualidade de mudas de pimenteira dedo-de-moça (Capsicum baccatum L.). Utilizou-se o delineamento em blocos casualizados, tendo como tratamentos cinco concentrações de escória (0%; 2,5%; 5%; 10% e; 20%) e quatro repetições. As avaliações ocorreram aos 55 dias após semeadura, consistindo na contagem do número de folhas, na medição da altura de planta e do diâmetro do coleto, na quantificação das massas secas de folhas e raízes da planta e na determinação do Índice de Qualidade de Dickson. Modelos de regressão foram ajustados (P < 0,05) aos tratamentos com níveis crescentes de escória de siderurgia. A adição em torno de 10% de escória ao substrato proporcionou os maiores valores das variáveis de crescimento, em mudas de pimenteira Dedo-de-moça.
Eficácia de Fusarium spp. no controle da murcha-de-curtobacterium do feijoeiro
Authors: Soares Rafael Moreira , Maringoni Antonio Carlos
Published: March 2018

RESUMO O presente trabalho teve como objetivos avaliar a ação inibitória de Fusarium oxysporum f. sp. phaseoli e Fusarium spp. in vitro sobre isolados de Curtobacterium flaccumfaciens pv. flaccumfaciens (Cff) e ação de Fusarium spp. no controle da murcha-de-curtobacteriurn, em plantas de feijoeiro cultivar IAC Carioca, conduzidas em vaso com substrato infestado pelo fungo em quatro concentrações. Os isolados de F. oxysporum f. sp. phaseoli e Fusarium spp. cultivados sobre discos de papel-de-filtro em meio de cultura agarizado produziram metabólitos que inibiram o crescimento dos isolados de Cff. Porém, extratos obtidos por filtragem de cultivos dos isolados fúngicos em meio líquido não inibiram, in vitro, o crescimento dos isolados de Cff. Os isolados de Fusarium spp. infestados no substrato, independente da concentração utilizada, não foram eficazes no controle da murcha-de-curtobacterium nas plantas de feijoeiro.
Indução de resistência à Macrophomina phaseolina em soja tratada com extrato de alecrim
Authors: Lorenzetti Eloisa , Stangarlin José Renato , Kuhn Odair José , Portz Roberto Luis
Published: March 2018

RESUMO Extratos vegetais podem induzir mecanismos de resistência de plantas em função da presença de compostos com características eliciadoras. O objetivo deste estudo foi avaliar o efeito do extrato bruto de alecrim nas concentrações 0%; 1%; 2,5% e 5% sobre a atividade de peroxidase, polifenoloxidase e fenilalanina amônia-liase (FAL) em soja inoculada com Macrophomina phaseolina. Foram retiradas amostras nos tempos 0, 36, 72, 120, 168, 216 e 264 h após o tratamento. Nas amostras retiradas do colo das plantas, para peroxidase, as concentrações mais elevadas do extrato proporcionaram dois picos de indução. Houve constante incremento na atividade de polifenoloxidase desde 36 até 120 h após o tratamento para a concentração 5%. Para FAL apenas a concentração 5% promoveu incremento 83% e 130% maior nos tempos 168 e 216 h após o tratamento, respectivamente. Para as atividades na raiz, peroxidase novamente apresentou dois picos de incremento para concentração 5%, a polifenoloxidase foi 426% maior na concentração 5% às 216 h após o tratamento e a atividade de FAL apresentou incremento de 340% no tempo 216 h após o tratamento com 5% do extrato. Estes resultados indicam o potencial do extrato de alecrim em induzir a atividade de enzimas de defesa em colo e raiz de soja.
Seleção de cultivares de soja para resistência à podridão negra da raiz (Macrophomina phaseolina)
Authors: Ishikawa Mayra Suemy , Ribeiro Neucimara Rodrigues , Oliveira Eli Carlos , Almeida Adriély Alves de , Balbi-Peña Maria Isabel
Published: March 2018

RESUMO A seleção a campo de materiais resistentes à podridão negra da raiz, além de ter alto custo, apresenta alta variabilidade, uma vez que muitos fatores externos podem afetar o comportamento das plantas e, inclusive, do fungo, de local para local e de ano para ano. Seleção de variedades com resistência à podridão causada por Macrophomina phaseolina em casa de vegetação apresenta maior uniformidade e estabilidade dos resultados, uma vez que as condições são controladas. No entanto, é recomendado que os resultados obtidos em ambiente protegido, para serem adotados como protocolo de screening, apresentem boa correlação com resultados obtidos em campo. Assim, este trabalho teve por objetivo comparar a eficiência de métodos de screening em casa de vegetação e verificar suas correlações com o comportamento de variedades de soja em ensaio de campo. Os métodos de screening avaliados foram disco de micélio sobre haste cortada; punção da haste com palito colonizado; solo infestado por inóculo produzido em arroz (1g, 5g e 10g por kg de solo); e rega com suspensão de microescleródios (3 x 104 e 6 x 104 UFC/mL) sobre raízes de plântulas. O ensaio de campo foi montado em área com histórico de ocorrência da doença, e o solo foi infestado com sementes de sorgo colonizadas por M. phaseolina, no sulco de semeadura. Plantas inoculadas na haste, em casa de vegetação, foram submetidas a duas condições de umidade: câmara úmida por três dias após a inoculação, e ausência de câmara úmida. A severidade da doença foi avaliada através do comprimento da lesão no método do disco de micélio sobre haste cortada, e, para os métodos da punção da haste com palito colonizado, suspensão de microescleródios e inoculação por infestação do solo, por escala de notas referente à lesão na raiz. Para o último, avaliou-se ainda a altura das plantas. Os métodos do corte da haste e do palito colonizado apresentaram melhores resultados para discriminar os genótipos, e a ausência de câmara úmida proporcionou maior severidade da doença. De maneira geral, BMX Apolo foi mais suscetível à doença, enquanto GDM15I029 e BMX Elite apresentaram maior resistência. Houve redução na altura das plantas inoculadas por infestação do solo, principalmente para a maior concentração do inóculo. A inoculação por suspensão de inóculo foi eficiente somente no maior nível de inóculo, e foi possível diferenciar dois genótipos quanto à severidade, sendo BMX Tornado mais suscetível que GDM15I029. Verificou-se correlação significativa com os dados de campo somente para o método do disco de micélio sobre a haste cortada, com (rs = 0,84) e sem câmara úmida (rs = 0,80). Os resultados sugerem que a seleção de cultivares em casa de vegetação para resistência a podridão negra da raiz realizado pelo método da haste cortada é eficiente e representativa do comportamento dos genótipos de soja em condições de campo.
Análise geoestatística do “vira-cabeça” na cultura do tomateiro
Authors: Quartezani Waylson Zancanella , Hell Leonardo Raasch , Cunha Junior Jadier de Oliveira , Moraes Willian Bucker , Belan Leônidas Leoni , Moraes Simone de Paiva Caetano Bucker , Jesus Junior Waldir Cintra de , Furtado Edson Luiz
Published: March 2018

RESUMO Em relação às diversas doenças que reduzem a produção da cultura do tomateiro, destaca-se a ocorrência da virose conhecida como “vira-cabeça”. Epidemias dessa doença são frequentes com altas taxas de progresso e danos significativos. Nesse caso, estudos sobre a variabilidade espaço-temporal podem auxiliar em propor estratégias de manejo. Portanto, o objetivo desse estudo foi mapear a distribuição espacial da incidência do “vira-cabeça” ao longo do tempo em lavoura de tomateiro, para entender os mecanismos de dispersão do patógeno e progresso da doença. Para isso, a presença ou ausência de sintomas da doença foi monitorada ao longo do tempo em 120 plantas georreferenciadas, dispostas em malha regular e distribuídos num espaçamento de 1,0 x 0,5 m. Os dados de incidência da doença foram submetidos à análise geoestatística. Após o ajuste dos semivariogramas foi realizada a interpolação dos dados por krigagem. Houve epidemia da doença na lavoura de tomate, e a taxa de progresso (Dy/Dt) variou de 4,7 a 6 plantas doentes/dia, e 100% das plantas apresentaram sintomas aos 20 dias após a primeira detecção da doença na lavoura. Houve dependência espacial forte da distribuição das plantas de tomateiro com sintomas de “vira-cabeça” em todas as avaliações, e valor de alcance variando de 4,3 a 1,69 m. Ao longo do tempo surgiram focos secundários da doença, expansão lateral e coalescência desses, caracterizando dispersão por ação do agente vetor associado às fontes de inóculo inicial, internas e externas à lavoura. O padrão aleatório de distribuição da doença evoluiu para agregado, e posteriormente regular.
Induction of defense enzymes and control of anthracnose in cucumber by Corymbia citriodora aqueous extract
Authors: Franzener Gilmar , Schwan-Estrada Kátia Regina Freitas , Moura Gabriela Silva , Kuhn Odair José , Stangarlin José Renato
Published: March 2018

ABSTRACT Secondary compounds of medicinal plants can activate defense mechanisms in plants against pathogens. The aqueous extract (AE) of Corymbia citriodora has shown that activity, but there is scarce information about the involved mechanisms of action. Therefore, this study aimed to evaluate the effect of AE on the induction of defense enzymes and protection of cucumber from Colletotrichum lagenarium. Thus, the AE, autoclaved or not, was evaluated for its capability of protecting and inducing peroxidases, polyphenoloxidases, chitinases and β-1.3-glucanases, and phenylalanine ammonia-lyase. Distilled water and acibenzolar-S-methyl (50 mg a.i. L-1) were used as controls. The effect of AE at the concentrations of 1, 5, 10, 15 and 20% was also evaluated, as well as its local and systemic effect, and the effect of one or two applications. Pathogen inoculation or sample collection for determination of enzyme activity was performed at 72 hours after treatments. The AE reduced the severity of C. lagenarium and induced peroxidases and β-1.3-glucanases by 37.6, 67.2 and 122.7%, respectively. There was a reduction in the disease severity and an increase in peroxidases from the concentration of 5% AE. The latter showed only local effect and greater reduction in severity when two applications were performed. These results suggest the effect of AE in inducing resistance in cucumber and inducing peroxidases and β-1.3-glucanases.
Encontrar-te: trajetos poéticos e invenção de lugares
Authors: Asanuma Gisele Dozono , Valent Isabela Umbuzeiro , Mendes Mariana Louver
Published: March 2018

Este trabalho apresenta imagens disparadas por modos de olhar e habitar a cidade de São Paulo, Brasil, desenvolvidos a partir da experiência do Projeto Encontrar-te entre os anos de 2005 e 2014. O projeto realizava saídas na cidade com um grupo formado a partir de uma composição heterogênea. A circulação por lugares da arte e da cultura em uma prática conectada com a invenção de formas de vida, de estar com o outro e de habitar a cidade compôs artifícios que favoreceram expressões poéticas, criativas e sensíveis; e a inauguração de gestos singulares.
Direito alimentar e risco na sociedade moderna: a Amazônia e o agronegócio
Authors: Zuin Aparecida Luzia Alzira , Amaral Jorge Luiz de Moura Gurgel do
Published: March 2018

Resumo Este trabalho trata sobre os modos de produção e consumo de alimentos e o risco na sociedade moderna, mais especificamente na Região Amazônica, lugar do avanço do agronegócio. Justamente pela carga semântica que subjaz nos termos/temas – alimento e segurança necessário o tratamento sobre o risco. Nesse caso, o estudo sobre o alimento e o risco é pautado, neste artigo, numa perspectiva interdisciplinar do Direito Alimentar, Comunicação, Economia e Filosofia do Direito.
Transgenic Bt maize does not affect the soil ant community
Authors: Assis Valéria Cristina Barbosa de , Chagas Pedro Guedes , Marinho Cidália Gabriela Santos , Fadini Marcos Antônio Matiello , Delabie Jacques Hubert Charles , Mendes Simone Martins
Published: March 2018

Abstract: The objective of this work was to survey soil ants in Bt and non-Bt maize (Zea mays) crops, and to compare their effect on the soil ant community. Nine pitfall traps, 10 m apart, were installed in a central area (900 m2) of each of the following treatments (2,500 m2): conventional maize; maize modified with the Cry1F, Cry1Ab, and Vip3A proteins; and a native vegetation area. Fortnightly collections were conducted during four periods (complete producing cycles) of the crop, from 2011 to 2013. The number of ant species varied from 25 in Bt maize (Vip 3A) to 58 in Bt maize (Cry 1F). The treatment with conventional maize showed the highest Shannon-Wiener diversity index (H’ = 2.60). Jaccard’s index showed that there is dissimilarity between the cultivated maize areas and the native vegetation area in most treatments, and that Bt and non-Bt maize show similarity in their soil ant assemblages. The cultivation of Bt maize does not affect the soil ant community. The subfamily Myrmicinae shows the highest number of species in all the collection periods, with 57, 41, 47, and 50 species in the first, second, third, and fourth periods, respectively. The genus Pheidole, belonging to this subfamily, shows the greatest number of species.
La labor tutorial y su impacto en la formación científico-investigativa inicial del docente
Authors: Mirabal Diane González , Caballero Gustavo Esteban Achiong
Published: March 2018

Resumen Este artículo presenta los resultados de una investigación de doctorado que estudió el proceso de tutoría en la formación científico-investigativa inicial del profesional de la educación en Cuba, teniendo en cuenta que la investigación científica constituye uno de los componentes esenciales y contenido de una de las funciones que desempeña el docente una vez graduado. En este escenario, la tutoría personalizada desempeña un importante papel ya que debe garantizar, a partir de la atención de las necesidades y potencialidades del estudiante tutorado, el desarrollo y sistematización del sistema de conocimientos y habilidades investigativas que le propicie desplegarlas en la realización de su trabajo científico-investigativo. En respuesta a esta necesidad se presenta una metodología que contribuya al perfeccionamiento de la tutoría en la formación científico-investigativa inicial del profesional de la educación. En la investigación se utilizaron métodos del nivel teórico, empírico y estadístico. La significación práctica se concreta en los procedimientos para la proyección y ejecución de la labor tutorial. La evaluación de la metodología se realizó mediante la aplicación del criterio de expertos y el análisis de los datos obtenidos durante el desarrollo de un pre-experimento pedagógico. Los resultados permiten afirmar que se logra efectividad en la acción tutorial con la aplicación de la metodología propuesta, posibilitando al profesor-tutor conducir al estudiante a través de una relación de ayuda que orienta su desarrollo y apoya sus necesidades en la actividad científico-investigativa, de forma que contribuye a la sistematización de sus habilidades en esta dirección.