bluuebunny/crossref_metadata_2025 huggingface dataset:
Investigación sobre adolescentes que son observadores de situaciones de ciberacoso
Authors: González Calatayud VÍctor , Prendes Espinosa Mª Paz , Bernal Ruiz Cristina
Published: January 2020

El ciberacoso es una realidad entre los adolescentes. En esta problemática no solo tenemos a cibervíctimas y ciberacosadores, sino que también están los ciberobservadores, los cuales juegan un papel fundamental. El objetivo principal fue conocer la prevalencia de ciberobservadores, ver las diferencias de género y edad, y relacionarlo con el uso del teléfono móvil y de Internet fuera de casa. Para ello se ha realizado un estudio transversal en el que se ha utilizado un cuestionario como instrumento. La muestra se ha seleccionado con un muestreo aleatorio estratificado, estando compuesta al final por un total de 950 estudiantes de la ESO, siendo un 50.4% chicos y con una media de edad de 13.93 (DT = 1.35). El 62.3% había observado al menos una de las conductas evaluadas durante el último año. Las chicas observaron en general más conductas que los chicos. En cuanto a la edad, los adolescentes de más edad son los que indicaron haber observado más ciberacoso. Aquellos adolescentes que disponen de ordenador en su propia habitación o los que tienen acceso a Internet fuera de casa observaron más ciberacoso. Teniendo en cuenta que el ciberacoso se da en un proceso grupal, los ciberobservadores juegan un papel fundamental para evitarlo.

Cyberbullying is a reality among adolescents. In this problem we not only have cybervictims and cyberbullies, but also cyberobservers, who play a fundamental role in this problem. The main objective of this research is to find out the prevalence of cyberobservers, see gender and age differences, and relate it to mobile phone and Internet use outside the home. To this end, a cross-sectional study has been carried out using a questionnaire as an information-gathering tool. The sample was selected with stratified random sampling, and at the end consisted of a total of 950 secondary school students, of which 50.4% were boys and with an average age of 13.93 (SD = 1.35). 62.3% had observed at least one of the behaviors assessed during the past year. Women generally observed more behavior than men. In terms of age, older adolescents are the ones who reported having observed the most cyberbullying. Teenagers who have computers in their own rooms or those who have access to the Internet outside the home observed more cyberbullying. Given that cyberbullying occurs in a group process, cyber-observers play a key role in preventing it.
EXPLORING THE VOCABULARY LEARNING STRATEGIES OF ITALIAN LEARNERS OF ENGLISH
Authors: Rock James
Published: January 2020

Author/s

James RockUniversità Cattolica del Sacro Cuore di Milano, Italy

 

ABSTRACT

In this paper, a think-aloud protocol is used to explore the vocabulary learning strategies of ten adult learners of English at a university in the north of Italy. The focus is on discovering the types of actions that are actually employed by learners while performing a deliberate vocabulary learning task. As well as providing information about frequency of use, the investigation revealed some patterns of strategy use. In general, less attention was awarded to techniques involving deeper mental elaboration, such as complex guessing for meaning or the use of mnemonic techniques, in favour of strategies requiring less mental effort. There was also less emphasis on mechanical repetition than in many previous studies on the topic.
ANALYSIS OF TRENDS AND BREAKPOINTS IN THE EVOLUTION OF OCCUPATIONAL HEALTH INDICATORS IN SPAIN, IN THE PERIOD 1995 TO 2017
Authors: GALLEGO BLASCO VICENTE SALVADOR , MARTORELL ALSINA SEBASTIAN , SANCHEZ GALDON ANA ISABEL
Published: January 2020

Occupational accidents pose considerable burdens to people, businesses and society in general. The analysis of trends in the evolution of time series related to occupational health indicators is an important tool to help determining the extent to which economic or structural changes in the sectors of industry, agriculture, construction and services have influenced the behavior of these indicators. Trend analysis is defined as a process of estimating gradual changes in a series of observations over time, while breakpoint analysis allows to detect abrupt changes in time series. In the literature, different nonparametric and parametric techniques are used to estimate breakpoints and trends. The presented study focuses on the analysis of occupational accidents in Spain in the period 1995-2017. The analysis covers a period of exceptional instability in the Spanish labor market, including a period of economic growth and deep recession. These economic changes brought changes in the composition of the labor market. In the paper, the main indicators used in the statistics of work accidents (Fatal Accident Rate, Incidence Index, Gravity Index, etc.) are analyzed in order to detect trends and changes in them, emphasizing its relationship with risk metrics. The results obtained in the case of application show that the economic and structural changes have affected in a different way the trends of the indicators analyzed.

Key Words: Work accidents; Risks evaluation; risk factor's; prevention of occupational hazards; occupational health; labor statistics
CONSTITUTIVE MODEL OF HIGTH STRENGTH CONCRETE BEHAVIOUR AT HIGTH TEMPERATURES
Authors: CRESPO ALVAREZ JORGE , AGUDO TOYOS PABLO , MASIAS  VERGARA MANUEL , DZUL LÓPEZ LUIS ALONSO , SAMANO CELORIO MARIA LUISA , BOSQUE EROLES RUBEN
Published: January 2020

When concrete is subjected to high temperatures, it experiences a series of chemical reactions that cause transformations in its microstructure and moisture content, which produce appreciable changes in the physical-mechanical properties of the material. In this paper a proposal of constitutive and state equations are presented, that have allowed to physically model the effect of the chemical transformations on high strength concrete and to describe the transitory evolution of the physical-mechanical properties with the increase of temperatures. In addition, a sensitivity analysis of the proposed model has been carried out which evaluates the responsiveness to the variation of different input parameters such as heating speed, intrinsic permeability, saturation and hydration initial degree and polypropylene fiber content. The results of the sensitivity analysis have shown that the assumptions and proposed equations allow to model the phenomenon with sufficient precision for its application for practical purposes.

Keywords: pore pressure, concrete, physical-mechanical properties, fire, constitutive model
MICRO-MACHINING OF A BIO-COMPATIBLE MATERIAL FOR PROSTHESIS PRODUCTION: 99.9% PURITY TANTALUM
Authors: MATA CABRERA FRANCISCO , GUASCA GONZALEZ ANDRES GUILLERMO , DOS SANTOS ANDERSON JUNIOR , DE OLIVEIRA LEITE WANDERSON , CAMPOS RUBIO JUAN CARLOS
Published: January 2020

During the last decades, micromilling has been widely researched for a wide variety of materials. However, the behavior of many materials has not yet been studied in the micro-machined area. Among these materials we can highlight those that have wide applications in industries such as aerospace, nuclear and biomedical. Within these last ones those biocompatible materials are the focus of this work. Thanks to its high melting point and its high resistance to corrosion, tantalum can have diverse applications in the above mentioned areas. In this paper we present the study of the cutting forces, mainly in the feed direction, and the acoustic emission in the micro-milling of 99.9 % purity tantalum with cemented carbide tools without coating and with two different coatings, (Ti,Al)N and DLC. The diameter of the tools was 500 µm, the cutting speed and the cutting depth of the test were kept constant with values of 63 m/min and 40 µm respectively, while 6 feed rates were in order to observe the influence of the critical undeformed chip thickness in the micro-milling operation. The recorded emission acoustic results allowed to identify the value of minimum chip thickness for each tool, while the power spectrum density results allowed to identify dominant frequencies of machining for different feeds per tooth. Regarding the feed force, it was possible to identify a minimum value for each tool as function of feed rate and the specific cutting force values showed the typical nonlinear behavior of the size effect.

Keywords: micro-milling, tantalum, acoustic emission, cutting forces, specific cutting force.
OPEN INNOVATION IN RESEARCH AND TECHNOLOGY ORGANISATIONS: AN EXPLORATION OF THE PHENOMENON
Authors: URIBE ECHEBARRIA RAMON , LIZARRALDE DORRONSORO RAFAEL , IGARTUA LOPEZ JUAN IGNACIO
Published: January 2020

This article empirically analyses open innovation (OI) in 37 Spanish research and technology organisations (RTOs) based on a survey carried out among their managers.
The research shows the wide use of OI by the RTOs, in accordance with their role as intermediaries in innovation systems. In comparison with companies, RTOs show skills in the management of AI emphasising its use as a strategy for responding to the demands of companies, improving their technology and ensuring its sustainability, while the search for efficiency and the risks reduction in innovation are less relevant.
Additionally, several key improvement areas for RTOs are identified (international collaboration, knowledge exploitation practices, OI management and IPR protection).

Key Words: Open Innovation, research and technology organisations, organisational aperture, intellectual property, management
DYNAMIC ORCHESTRATION IN SOFTWARE AS A SERVICE
Authors: SANTAOLAYA SALGADO RENE , RUIZ PAZ SERGIO FABIAN , FRAGOSO DIAZ OLIVIA GRACIELA , ALVAREZ RODRIGUEZ FRANCISCO JAVIER , GONZALEZ SERNA JUAN GABRIEL
Published: January 2020

Software as a Service (SaaS) is one of the services of the Computational Cloud that is generating an increase in production and competitive advantages in organizations. This is due to the ease of supply, delivery times and costs associated with its use. Allowing consumers to use them at the required time, under a pay-per-use model, achieving their business processes and reach their value goal.
WANKEL ROTARY ENGINES, PAST, PRESENT AND FUTURE
Authors: CASANOVA KINDELÁN JESÚS , LOPEZ MARTINEZ JOSE MARIA
Published: January 2020

Many researchers and engineers have been focused on the rotary internal combustion engines of the Wankel type. These engines have been used in various applications, mainly in the transport sector, but its futures is not very encouraging. In order to be able to better understand this, in this article its history from its creation by Dr. Wankel creation to our days is related. The fundamentals of its design and operation with the rotary pistons in the inner of a trochoid are explained and the pros and cons of such design versus a conventional cylindrical pistons engine are justified. Finally the current vision about the future of the Wankel engines and its foreseeable applications are presented.

Keywords: Internal combustion engines, Wankel rotary engines
IMPLEMENTATION ASPECTS OF PI CONTROLLERS FOR ACTIVE POWER FILTERS
Authors: TERÁN GONZÁLEZ RAÚL ANTONIO DE JESÚS , PEREZ RAMIREZ JAVIER , BERISTÁIN JIMÉNEZ JOSÉ ANTONIO
Published: January 2020

Active Power Filters (AFP) have been shown to be a good option for improving the power factor (PF) and mitigating THD current in the electrical grid. FAP operation involves two main tasks: regulating the dc voltage and controlling the compensation current. Fulfilling these tasks requires a cascade controller, which consists of two control loops: an external loop for regulating the dc voltage and an internal loop for controlling the compensation current.
Programación de videojuegos «indie» con XNA
Authors: Bosch Jesús
Published: January 2020

Existe una alternativa al diseño de juegos profesional, los “indie games”. Se trata de videojuegos producidos por estudios independientes o equipos de programadores amateur, sin el apoyo económico de las grandes distribuidoras o inversores. XNA es un framework gratuïto creado por Microsoft basado en .Net compatible con un gran número de plataformas que facilita la distribución en algunas de las videoconsolas más usadas.
Raül Esteve
Authors: Guerrero David , Marín Antoni
Published: January 2020

Raül Esteve ha dedicado toda su vida al mundo de la fotografía y ha podido observar desde muy cerca el cambio del analógico al digital. En la entrevista nos detalla su trayectoria y nos presenta último trabajo, Tacte llatí, relacionado con la música latina y el jazz, en el que lleva trabajando largo tiempo. Tacte llatí se ofrece gratuitamente desde la Obra Social Caixa Sabadell.
Prediksi Respons Terapi Leukemia Granulositik Kronis: Skor Mana yang Lebih Baik?
Authors: Mulansari Nadia Ayu
Published: January 2020

Leukemia granulositik kronik (LGK) merupakan suatu keganasan myeloproliferatif dengan karakteristik ditemukannya kromosom Philadelphia (Ph). Kromosom Ph ini disebabkan oleh translokasi resiprokal antara kromosom 9 dan 22 [t(9;22)] dan terbentuknya fusi gen BCR-ABL1. Fusi gen tersebut akan menghasilkan suatu protein yang menderegulasi aktivitas dari tirosin kinase (p210) yang berperan pada patogenesis LGK.
The CDK Pef1 and protein phosphatase 4 oppose each other for regulating cohesin binding to fission yeast chromosomes
Authors: Birot Adrien , Tormos-Pérez Marta , Vaur Sabine , Feytout Amélie , Jaegy Julien , Alonso Gil Dácil , Vazquez Stéphanie , Ekwall Karl , Javerzat Jean-Paul
Published: January 2020

Cohesin has essential roles in chromosome structure, segregation and repair. Cohesin binding to chromosomes is catalyzed by the cohesin loader, Mis4 in fission yeast. How cells fine tune cohesin deposition is largely unknown. Here, we provide evidence that Mis4 activity is regulated by phosphorylation of its cohesin substrate. A genetic screen for negative regulators of Mis4 yielded a CDK called Pef1, whose closest human homologue is CDK5. Inhibition of Pef1 kinase activity rescued cohesin loader deficiencies. In an otherwise wild-type background, Pef1 ablation stimulated cohesin binding to its regular sites along chromosomes while ablating Protein Phosphatase 4 had the opposite effect. Pef1 and PP4 control the phosphorylation state of the cohesin kleisin Rad21. The CDK phosphorylates Rad21 on Threonine 262. Pef1 ablation, non-phosphorylatable Rad21-T262 or mutations within a Rad21 binding domain of Mis4 alleviated the effect of PP4 deficiency. Such a CDK/PP4-based regulation of cohesin loader activity could provide an efficient mechanism for translating cellular cues into a fast and accurate cohesin response.
From behavior to circuit modeling of light-seeking navigation in zebrafish larvae
Authors: Karpenko Sophia , Wolf Sebastien , Lafaye Julie , Le Goc Guillaume , Panier Thomas , Bormuth Volker , Candelier Raphaël , Debrégeas Georges
Published: January 2020

Bridging brain-scale circuit dynamics and organism-scale behavior is a central challenge in neuroscience. It requires the concurrent development of minimal behavioral and neural circuit models that can quantitatively capture basic sensorimotor operations. Here, we focus on light-seeking navigation in zebrafish larvae. Using a virtual reality assay, we first characterize how motor and visual stimulation sequences govern the selection of discrete swim-bout events that subserve the fish navigation in the presence of a distant light source. These mechanisms are combined into a comprehensive Markov-chain model of navigation that quantitatively predicts the stationary distribution of the fish’s body orientation under any given illumination profile. We then map this behavioral description onto a neuronal model of the ARTR, a small neural circuit involved in the orientation-selection of swim bouts. We demonstrate that this visually-biased decision-making circuit can capture the statistics of both spontaneous and contrast-driven navigation.
Helden der Arbeitswelt
Authors: Pietzuch Anja
Published: January 2020

Das Unterrichtsmodell beschreibt, wie die Schüler in mehreren Schritten in die Lage versetzt werden, den beruflichen Werdegang und den Arbeitsalltag einer Person auf Deutsch nachzuerzählen und zu bewerten.
Vertieftes Lernen durch (virtuelles) Reisen: Umgang mit Kulturerbe vor Ort! Innovativ und lebensweltorientiert.
Authors: Rolka Sabine , Vaske Andrea
Published: January 2020

Der Text gibt eine kurze Einführung zu Hintergrund und Vorgehensweise der Unterrichtsprojekte zum Thema Kulturerbe vor Ort/ virtuelle Reiseführer, die in diesem Kapitel vorgestellt werden.
Bioactivity of compounds secreted by symbiont bacteria of Nudibranchs from Indonesia
Authors: Kristiana Rhesi , Bedoux Gilles , Pals Gerard , Mudianta I. Wayan , Taupin Laure , Marty Christel , Asagabaldan Meezan Ardhanu , Ayuningrum Diah , Trianto Agus , Bourgougnon Nathalie , Radjasa Ocky Karna , Sabdono Agus , Hanafi Muhammad
Published: January 2020

The aims of this work are to isolate bacterial symbionts from nudibranchs and subsequently to determine anti-Methicillin resistantStaphylococcus aureus(MRSA), cytotoxicity and anti-Herpes simplex virus type 1 (HSV-1) activities of bio compounds. A total of 15 species of nudibranchs were collected from Karimunjawa and five species from Bali, respectively. A total of 245 bacteria isolates were obtained. The anti-MRSA activity screening activity indicated two active bacteria. Ethyl acetate extracts from supernatants, indicating extracelullar compounds, showed an inhibition zone against MRSA at concentrations of 500–1,000 µg/ml. DNA sequence analysis showed that the strain KJB-07 fromPhyllidia coelestiswas closely related toPseudoalteromonas rubra, whereas the strain NP31-01 isolated fromPhyllidia varicosawas closely related toVirgibacillus salarius. The extract ofPseudoalteromonas rubrawas cytotoxic to Vero cells at a concentration of 75 µg/ml. The extract ofV. salariuspresented no cytotoxicity at concentrations of 5–1,000 µg/ml. No anti HSV-1 was observed for both isolated bacteria. This is the first study describing research on anti-MRSA, cytotoxicity and anti HSV-1 activity of bacterial symbionts from the viscera of nudibranch. Compounds produced byPseudoalteromonas rubraandV. salarius, had potential anti-MRSA activity. However, only extracts fromPseudoalteromonas rubrashowed cytotoxic effects on Vero cells. Three compounds were identified by LC/MS after purification from culture supernatant.
Effects of low pH and feeding on calcification rates of the cold-water coralDesmophyllum dianthus
Authors: Martínez-Dios Ariadna , Pelejero Carles , López-Sanz Àngel , Sherrell Robert M. , Ko Stanley , Häussermann Verena , Försterra Günter , Calvo Eva
Published: January 2020

Cold-Water Corals (CWCs), and most marine calcifiers, are especially threatened by ocean acidification (OA) and the decrease in the carbonate saturation state of seawater. The vulnerability of these organisms, however, also involves other global stressors like warming, deoxygenation or changes in sea surface productivity and, hence, food supply via the downward transport of organic matter to the deep ocean. This study examined the response of the CWCDesmophyllum dianthusto low pH under different feeding regimes through a long-term incubation experiment. For this experiment, 152 polyps were incubated at pH 8.1, 7.8, 7.5 and 7.2 and two feeding regimes for 14 months. Mean calcification rates over the entire duration of the experiment ranged between −0.3 and 0.3 mg CaCO3g−1d−1. Polyps incubated at pH 7.2 were the most affected and 30% mortality was observed in this treatment. In addition, many of the surviving polyps at pH 7.2 showed negative calcification rates indicating that, in the long term, CWCs may have difficulty thriving in such aragonite undersaturated waters. The feeding regime had a significant effect on skeletal growth of corals, with high feeding frequency resulting in more positive and variable calcification rates. This was especially evident in corals reared at pH 7.5 (ΩA= 0.8) compared to the low frequency feeding treatment. Early life-stages, which are essential for the recruitment and maintenance of coral communities and their associated biodiversity, were revealed to be at highest risk. Overall, this study demonstrates the vulnerability ofD. dianthuscorals to low pH and low food availability. Future projected pH decreases and related changes in zooplankton communities may potentially compromise the viability of CWC populations.
Basic and target eco-environment water requirements of a dry inland river under typical flow frequencies in China
Authors: Fu Aihong , Li Weihong , Wang Yi , Bai Yifei
Published: January 2020

Analysis of eco-environmental water requirements (EEWRs) and water resource allocation strategies for arid, inland river basins can provide the theoretical basis for sustainable water utilization and management. In this paper, an optimal water resource allocation strategy is proposed for Yarkand River Basin in Xinjiang, China, on the basis of a comprehensive analysis of runoff data collected between 1970 and 2016, three ecological environmental protection goals, basic eco-environmental water requirement (BEEWR) aimed at sustaining aquatic ecosystems within the river, and target eco-environmental water requirements (TEEWR) aimed at protecting various types of riparian vegetation along the river. The results showed that: (1) after the runoff in Kaqun reach subtracting the BEEWR, the annual average river loss (recharge), and the amount of water diversion for irrigation (51.43 × 108 m3) from flows along the Kaqun reach, the remaining water volume during wet years was able to meet all three TEEWRs; (2) during moderately wet years, the remaining water was capable of meeting the second and third TEEWRs; and (3) during dry and extremely dry years, there was little or no residual water available to meet TEEWRs. The proposed optimal water resource allocation strategy, based on the above findings, states that the water diversion requirement for irrigation and domestic use allocated from the total amount of runoff should not exceed the National Water Policy (Three Red Lines) standard first. Then, the BEEWR allocated from the runoff should be met second, and the annual average river loss, third. Depending on the amount of remaining water, the second and third TEEWRs can be fulfilled during wet years, but during moderately wet years, only the third TEEWR can be met. During dry and extremely dry years, only the BEEWR of the river can be met and only during the flood season.
The fossil record of the genus Varanus from the Southern Caucasus (Armenia, Georgia)
Authors: Vasilyan Davit , Bukhsianidze Maia
Published: January 2020

The Southern Caucasus, with its special geographic position and complex topography, is a well-known biodiversity hotspot. However, the formation of this hotspot remains largely unstudied. To reveal this, a thorough study of the fossil record of the region is necessary. In the present paper, we describe for the first time fossil monitor lizards (Varanus sp.) from two late Miocene localities from the Southern Caucasus (Jradzor, Armenia and Tetri Udabno, Georgia). We suggest that both fossils belong to a small-sized monitor lizard, comparable to the present-day species found in Iran and the Middle East (e.g., Iraq, Saudi Arabian)—the most western part of the extant monitor lizards’ Eurasian distribution range. Our finds show that the genus had a broad distribution in the Eastern Paratethyan region during the late Miocene. In addition, we provide the probable temperature ranges for fossil localities.
Scarlet letters: The association of alternative admissions track plan status with key programmatic outcomes in a chiropractic training program
Authors: Derby Dustin C. , Percuoco Robert E. , Everetts Amy
Published: January 2020

Objective:

In 2012, the Council on Chiropractic Education (CCE) enacted new admission standards with related provisions under a new Policy 7, the Alternative Admissions Track Plan (AATP). The current study examined the relationships between typically admitted students and their AATP counterparts on three student success outcome measures: Graduation at the 150th percentile time frame, National Board of Chiropractic Examiners (NBCE) Part I pass rates, and completion of all four NBCE examinations within 6-months after graduation.

Methods:

The authors used three random samples (n = 1050) drawn from a relational database, containing program outcome variables and student characteristics. Assessment of the outcome measures occurred using Pearson χ2 test of independence and the Φ coefficient effect size measure.

Results:

Significant relationships with small effect sizes and weak associations were found between AATP status and graduation at the 150th percentile (p < .01, Φ = .118) and NBCE Part I pass rates (p < .01, Φ = .114). No significant association between AATP status and NBCE Completion rates 6-months after graduation (p = .144, Φ = .045) was found.

Conclusion:

The weak associations between variables indicate that AATP status did not meaningfully relate to the outcome variables. There likely are other subtle characteristics and attributes that influence successful completion of key programmatic outcomes. The weak associations found in the current study suggest that when governed under the same academic policies with equal access to support resources, there does not appear to be a meaningful association between the programmatic success of AATP and non-AATP students on key outcomes.
Volatile Compounds, Fatty Acid Composition and Antioxidant Activity of Centaurea albonitens and Centaurea balsamita Seeds Growing in Van, Turkey
Authors: Peker Sümeye , Baştürk Ayhan
Published: January 2020

Aims: The aim of this study was to determine and compare the potential of Centaurea albonitens and Centaurea balsamita seeds as alternative raw materials for edible oil production and natural antioxidant sources.

Study Design: C. balsamita and C. albonitens were harvested from the district of Van province during harvest-maturity period in August-September 2017. The plants were identified by a biologist, Prof. Dr. Murat ÜNAL. The Voucher specimens (B5495, MÜ68611) were deposited at the Virtual Herbarium of Lake Van Basin, Van Yüzüncü Yil University, Faculty of Education.

Place and Duration of Study: The study was carried out between June 2017 - January 2019 in Yüzüncü Yıl University, Faculty of Engineering, Food Engineering Department laboratory.

Methodology: This study consists of two parts. In the first part, crude oil, moisture, ash, protein content, total phenolic content (TPC), volatile components and antioxidant activities of Centaurea albonitens and Centaurea balsamita seeds were determined. In the second part, fatty acid compositions, tocopherol contents, peroxide values (PV), free fatty acidity (FFA) and color values of seed oils obtained by cold extraction were determined.

Results: The antioxidant capacities were determined by the 2,2-diphenylpicrylhydrazyl (DPPH) and the 2,2′-azinobis-(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS) assays. Results were 26.60 and 27.12%, and 80.61 and 95.99 mmol Trolox eq/g for C. balsamita and C. albonitens seeds, respectively. The total phenolic content of the seeds were determined to be 9019 and 11501 mg GAE/kg, respectively. The average α-tocopherol content were found to be 1186 and 1689 mg/kg oil. Oil yields of the seeds were found to be 19.36 and 17.65 %, for C. balsamita and C. albonitens seeds, respectively. In fatty acid profiles; linoleic, oleic, palmitic and stearic acids were determined as the most dominant fatty acids. 22 volatile compounds were detected in C. balsamita seed while this was 26 volatile compounds in C. albonitens seed.

Conclusion: In this study, it was concluded that C. albonitens and C. balsamita seeds may be considered as alternative raw materials for edible oil production, and these seeds can be used in the formulation of functional foods due to their high level of α-tocopherol, natural antioxidants and polyunsaturated fatty acids.
Leaf Nutrient Status Vis-à-vis Fruit Yield and Quality of Sweet Orange (Citrus sinensis (L.) Osbeck)
Authors: Reddy A. Ramanjaneya , Munaswamy V. , Reddy P. Venkataram Muni , Reddy B. Ravindra , Sudhakar P.
Published: January 2020

The present study was conducted to know the effect of leaf nutrient status on fruit yield and quality of sweet orange (Citrus sinensis (L.) Osbeck) in YSR district of Andhra Pradesh, India. In this investigation fifty sweet orange orchards aged between 12 to 13 years were selected and plant samples such as index leaves and matured fruits were collected from 10 per cent of plants in each orchard. Leaf Zn deficiency (62%) was the most severe among the 10 mineral elements tested and followed by Fe (54%), Mn (52%) and Cu (26%). Fruit yield showed significant positive correlation with leaf N (r =0.519**) and P (r =0.409**). Fruit weight had significant positive correlation with leaf Nitrogen (r = 0.469**), Phosphorus (r = 0.446**) and Potassium (r = 0.415**). Fruit juice percent was significantly and positively correlated with leaf N (r =0.353**) and P (r =0.364**). Titrable acidity had significant negative correlation with leaf Fe (r = -0.371**) and leaf Mn (r = -0.292*). Total Soluble Solids (TSS) showed a significant positive relation with leaf P (r = 0.438**) and significant negative correlation with leaf Mn (r = -0.311*). Vitamin C content of the sweet orange fruit had significant positive correlation with leaf N (r = 0.437**), P (r = 0.516**) and K (r = 0.398**).
Epidemiological Features of Cutaneous Leishmaniasis in Zliten (North West of Libya)
Authors: Arshah Tarek Mohamed , Arshah A. Arhman Mohamed
Published: January 2020

Cutaneous Leishmaniasis is endemic in north-west of Libya for long time and it’s spread to other new foci continues to involve new areas like Taurgha, Sirt and recently, Zliten. Most of the patients in north-west of Libya were infected with zoonotic Cutaneous Leishmaniasis, which caused by leishmania major, although some cases of anthroponotic cutaneous leishmaniasis caused by leishmania tropica were also reported. Zliten is a coastal city in the north west of Libya; with more than 289000 people; and now is known to be a new focus since 2016 when the sudden increase of the number of patients with Cutaneous Leishmaniasis had occurred.

Aims: This study was performed to observe epidemiological changes about incidence, age of patients, geographical distribution in Zliten city over a period of last 2 year (2017 and 2018(.

Study Design: Cross-sectional study as retrospective study over time of two years, involving all patients, who were presented or referred, to get management of Cutaneous Leishmaniasis,  in three accredited outpatient departments for cutaneous leishmania (in Zliten). The data were collected and analyzed in Zliten Teching Hospital.

Place and Duration of Study: Outpatient Department of Dermatology and Venereology of Zliten Teaching Hospital between 1st January 2017 and 31st December 2018.

Methodology: The study included all patients (different gender and from all age groups) with Cutaneous Leishmaniasis, who sought medical advice in dermatology reference clinics in Zliten, over the period of 2 years (2017 and 2018). The main collected data were age, sex, number of lesions, and affected sites in the body, residency of the patients, year and month of presentation. The analysis of data was made with the use of Statistical Package for the Social Sciences (SPSS 25).

Results: Eight hundred thirty nine patients were included in this study. The majority of patients came from Zliten and these represented 95.6%, while the most of them came from Majer (south eastern part of Zliten City with more than 25000 people living in it) and represented 45.5% of total patients with CL included in this study, followed by Al-juma (south western part of Zliten with around 52000 people), represented (28%) of total patients with CL.

Males were found to be more affected, with male to female ratio, 2.4:1. The most affected age group were these less than forty with peak incidence at age group (20 yrs to 30 yrs). The registered patients in 2017 were 397, this number had increased slightly to be 440 in the following year (2018).

The distribution of patients had shown seasonal variations, with steep increase in the number of cases in December, November and January.

Conclusion: Cutaneous Leishmaniasis is remained to be a major health problem in Zliten, affecting a large number of population every year and need further study to determine molecular identification of parasites, and more efforts are needed to control the vector and reservoir.
Influence of Foliar Nutrition on Seed Setting Percentage, Yield and Economics of Red Gram (Cajanus cajan (L.)) under Irrigated Condition
Authors: Sivakumar C. , . Krishnaveni , Pandiyan M.
Published: January 2020

Field experiments were conducted to study the influence of foliar nutrition on pod setting percentage, yield and economics of red gram (Cajanus cajan (L.)  under the irrigated condition at Regional Research Station, Tamil Nadu Agricultural University, Paiyur - 635 112, Tamil Nadu, India in Kharif season of 2016-17. To study the effect of different nutrient sources the following treatments were imposed. The treatments include the foliar application of 2% DAP twice at flowering and 15 days thereafter first spray (T1), Foliar application of TNAU pulse wonder at 5 kg/ha at peak flowering (T2), Foliar application of 0.5% MAP twice at flowering and 15 days thereafter first spray (T3). Foliar application of CCC 200 ppm twice at flowering and 15 days thereafter (T4) and Control (water spray)(T5). Among the treatments, it was concluded that application of 0.5% mono ammonium phosphate (MAP) at flowering and 15 days after the first spray recorded the higher grain and stalk yield of 1522 and 6222 kg ha-1 in red gram respectively and also recorded a higher gross income of Rs. 91320, net income of Rs. 50520 and B: C ratio of 2.2. Further, the yield increase was 25% higher yield over control (water spray) and 12% higher over-application of CCC 200 ppm twice at flowering and 15 days after the first spray.
Punching Strengthening of Concrete Slab-column Connections Using Near Surface Mounted (NSM) Carbon Fiber Reinforced Polymer (CFRP) Bars
Authors: H. Abdel-Kareem Ahmed
Published: January 2020

This paper investigates experimentally the effect of near surface mounted (NSM) carbon fiber reinforcement polymer (CFRP) bars as externally strengthening on the punching shear behavior of interior slab-column connections. Many researchers used NSM as a novel strengthening technique in various structural elements. However, the strengthening of slab-column connections using NSN is relatively new. Seven Reinforced concrete (RC) square slabs with a concentric column were tested over simply supported four sides. One control specimen was tested without strengthening, four specimens were strengthened using NSM-CFRP bar installed in pre-cut groove surrounded the column at the tension side of the slab, and two specimens were strengthened using externally bonded (EB) CFRP strips which have the same tensile force of the CFRP bars. The arrangement and the location of the strengthened materials were also test variables. The test results showed that using NSM strengthening technique significantly increased the punching shear capacity and ultimate stiffness compared to using EB strengthening technique. Where the increasing in the punching capacity and ultimate stiffness were 18% and 13-18%, respectively. Moreover, the NSM-CFRP bars greatly reduced the cracks in the punching shear zone around the columns. The measured ultimate punching shear capacity for the tested specimens showed very reasonable agreement with the calculated punching loads based on an analytical model for slab-column connections strengthened using FRP that account for its arrangement and location.
Caregivers/Patients Perception and Satisfaction with Outpatient HIV Services at the University of Port Harcourt Teaching Hospital (UPTH), Port Harcourt, Nigeria
Authors: Paul Nsirimobu Ichendu , Ugwu Rosemary Ogochukwu
Published: January 2020

Background: Patient perception and satisfaction is an indicator used to evaluate the quality of healthcare. This study aimed to assess patients’/caregivers’ perception and satisfaction with outpatient HIV services.

Methodology: This was a cross sectional study carried out at the Paediatric HIV clinic of the University of Port Harcourt Teaching Hospital, Port Harcourt, Nigeria. Purposive and convenient sampling methods were used to recruit 152 out patients just before they exit the outpatient department (OPD). Exit interviews were conducted with a three-point Likert scale using a Pretested self-administered questionnaire. Participation was voluntary and consent was obtained from all participants. Obtained data was analysed using epi info version 7, Chi-square test was used to test the association between the overall satisfaction level and sociodemographic characteristics of the patients. Statistical significance for the chi-square test was set at p< 0 .05.

Results: A total of 152 caregivers/patients participated in the study, only 31 (20.4%) were patients, aged 15-18years, 77 (50.7%) were aged from 26 and 41 years, 111(73%) were females, 99 (65.1%) were married and 76(50.0% had secondary level of education. Majority of the patients (130, 85.53%) were satisfied with the provider interpersonal skills followed by the physical environment at the OPD (118, 77.63%). However, only 53.29% were satisfied with the waiting and consulting time. The overall satisfaction rate was 73. 68% based on the three domains measured. The results showed a statistically significant association between the overall level of satisfaction and the female gender (X2= 4.67, p = 0.0306) and those with tertiary educational level (X2= 14.48, p= 0.0001) of the patients/caregivers.

Conclusion: The level of satisfaction with outpatient HIV services at the UPTH is high. Program managers review of patients’ appointment time and use of electronic consultation tool will reduce the consulting and waiting time and further improve patient’s satisfaction.
Time Portals, Love Machines, Land Oracles: Hybrid Geography and the Situated Digital
Authors: Waterman Tim
Published: January 2020

London‐based digital art collective Furtherfield creates events and space that encourage cultural flowering through the celebration of difference and otherness. Executive director Tim Waterman, a senior lecturer in landscape history and theory at the Bartlett School of Architecture, University College London, takes us on a journey, starting with the organisation's inception, then projecting us into the future with an outline of its projects for the next few years.
At a Tangent: Delineating a New Ecological Imaginary
Authors: Gandy Matthew
Published: January 2020

How are the ‘iron landscapes’ of disused railway tracks of the 19th and 20th centuries rejuvenated by encouraging inclusive and diverse uses? Matthew Gandy, a professor of geography at the University of Cambridge, charts the phased design of the Park am Gleisdreieck in Berlin. He questions whether the design of the park can be considered separately from the politics of housing as he highlights tensions between civic society and urban regeneration.
Anti‐Infective Application of Graphene‐Like Silicon Nanosheets via Membrane Destruction
Authors: Luo Yao , Ge Min , Lin Han , He Renke , Yuan Xiangwei , Yang Chao , Wang Wei , Zhang Xianlong
Published: January 2020

The increasing problem of bacterial resistance to the currently effective antibiotics has resulted in the need for increasingly potent therapeutics to eradicate pathogenic microorganisms. 2D nanomaterials (2D NMs) have unique physical and chemical properties that make them attractive candidates for biomedical applications. Recently, the application of 2D NMs as antibacterial agents has attracted significant attention. Herein, a novel 2D graphene‐like silicon nanosheet (GS NS) antimicrobial agent is fabricated from pristine silicon crystals by ultrasonication, which results in a highly exfoliated planar morphology and a significantly larger surface area as compared with bulk silicon. The GS NSs exhibit remarkable in vitro broad‐spectrum bactericidal activity against Gram (−) Escherichia coli and Gram (+) Staphylococcus aureus because of a close interaction with the bacteria, which leads to highly efficient membrane destruction. The in vivo studies demonstrate that the local administration of GS NSs effectively mitigates implant‐related infection by reducing the bacterial burden of the extracted samples and accelerating the remission of local inflammation. Based on these encouraging results, GS NSs are expected to be a useful new member of the 2D NMs family, with the potential of effectively killing pathogenic bacteria in clinical applications.
In Situ Investigation of Reversible Exsolution/Dissolution of CoFe Alloy Nanoparticles in a Co‐Doped Sr2Fe1.5Mo0.5O6−δ Cathode for CO2 Electrolysis
Authors: Lv Houfu , Lin Le , Zhang Xiaomin , Song Yuefeng , Matsumoto Hiroaki , Zeng Chaobin , Ta Na , Liu Wei , Gao Dunfeng , Wang Guoxiong , Bao Xinhe
Published: January 2020

Reversible exsolution and dissolution of metal nanoparticles in perovskite has been investigated as an efficient strategy to improve CO2 electrolysis performance. However, fundamental understanding with regard to the reversible exsolution and dissolution of metal nanoparticles in perovskite is still scarce. Herein, in situ exsolution and dissolution of CoFe alloy nanoparticles in Co‐doped Sr2Fe1.5Mo0.5O6–δ (SFMC) revealed by in situ X‐ray diffraction, scanning transmission electron microscopy, environmental scanning electron microscopy, and density functional theory calculations are reported. Under a reducing atmosphere, facile exsolution of Co promotes reduction of the Fe cation to generate CoFe alloy nanoparticles in SFMC, accompanied by structure transformation from double perovskite to layered perovskite at 800 °C. Under an oxidizing atmosphere, spherical CoFe alloy nanoparticles are first oxidized to flat CoFeOx nanosheets, and then dissolved into the bulk with structure evolution from layered perovskite back to double perovskite. Electrochemically, CO2 electrolysis performance can be retrieved during 12 redox cycles due to the regenerative ability of the CoFe alloy nanoparticles. The anchoring of the CoFe alloy nanoparticles in SFMC perovskite via reduction shows enhanced CO2 electrolysis performance and stability compared with the parent SFMC perovskite.
Synthesis of Pashinintide A, a Natural Cyclic Hexapeptide Supposedly Capable of Forming a Complex with Sucrose
Authors: Yin Xuejian , Li Wei , Yu Biao
Published: January 2020

Pashinintide A, a cyclic hexapeptide discovered from Pyrus pashia, has been synthesized in a linear sequence of 8 steps and 24% overall yield from N‐Boc glycine, featuring a convergent [3+3] fragment coupling strategy. Although the structure of the synthetic Pashinintide A was unambiguously confirmed by X‐ray diffraction analysis, its proposed complexation with sucrose cannot be validated.
Negativ geladene gelb emittierende 1‐Aminopyrene für reduktive Aminierung und Fluoreszenznachweis von Glykanen
Authors: Savicheva Elizaveta A. , Mitronova Guyzel Yu. , Thomas Laura , Böhm Marvin J. , Seikowski Jan , Belov Vladimir N. , Hell Stefan W.
Published: January 2020

1‐Aminopyrene mit drei ω‐hydroxylierten N‐ Alkylsulfonamido‐ oder Alkylsulfonylgruppen an C‐3, C‐6 und C‐8 wurden hergestellt, O‐phosphoryliert und in der reduktiven Aminierung von Oligosacchariden eingesetzt. Diese Farbstoffe (ϵ≈20 000 m−1 cm−1) mit sechs negativen Ladungen (pH≥8) und niedrigen m/z‐Werten ermöglichen die Markierung, Elektrophorese und Detektion von reduzierenden Zuckern (Glykanen), welche die strukturell und funktionell vielfältigste Klasse von Naturprodukten darstellen. Bei Anregung mit einem 488‐nm‐Laser emittieren die neuen Glykokonjugate gelbes Licht von etwa 560 nm und weisen bessere Helligkeit und höhere elektrophoretische Mobilität als die entsprechenden APTS‐Derivate (Referenz mit grüner Emission) auf.
Kooperative Katalyse für die diastereo‐ und enantioselektive [4+3]‐Cycloanellierung von ortho‐Chinonmethiden und Carbonylyliden
Authors: Suneja Arun , Loui Henning Jakob , Schneider Christoph
Published: January 2020

Im Rahmen dieser Arbeit wurde ein Verfahren zur diastereo‐ und enantioselektiven [4+3]‐Cycloanellierung von ortho‐Chinonmethiden und Carbonylyliden entwickelt, das funktionalisierte, sauerstoffverbrückte Dibenzooxazine in exzellenten Ausbeuten und Stereoselektivitäten innerhalb eines einzelnen Syntheseschrittes zugänglich macht. Die kooperative Katalyse von Rhodium und einer chiralen Brønsted‐Säure ermöglicht die in situ Erzeugung zweier hochreaktiver Intermediate, die zu komplexen, bicyclischen Produkten mit einem tertiären und zwei quartären Stereozentren reagieren. Diese wurden durch weitere Transformationen in wertvolle, enantiomerenangereicherte Synthesebausteine überführt.
Negatively Charged Yellow‐Emitting 1‐Aminopyrene Dyes for Reductive Amination and Fluorescence Detection of Glycans
Authors: Savicheva Elizaveta A. , Mitronova Guyzel Yu. , Thomas Laura , Böhm Marvin J. , Seikowski Jan , Belov Vladimir N. , Hell Stefan W.
Published: January 2020

1‐Aminopyrenes with three ω‐hydroxylated N‐alkylsulfonamido or alkylsulfonyl residues in positions 3, 6, and 8 were prepared, O‐phosphorylated, and applied for reductive amination of oligosaccharides. The dyes (ϵ≈20 000 m−1 cm−1) with six negative charges (pH≥8) and low m/z ratios enable labeling and fluorescence detection of reducing sugars (glycans) related to the most structurally and functionally diverse class of natural products. Under excitation with a 488 nm laser, the new glycoconjugates emit yellow light of about 560 nm, outperforming (with respect to brightness and faster electrophoretic mobilities) the corresponding APTS derivatives (benchmark dye with green emission in conjugates).
Oxalyl‐CoA Decarboxylase Enables Nucleophilic One‐Carbon Extension of Aldehydes to Chiral α‐Hydroxy Acids
Authors: Burgener Simon , Cortina Niña Socorro , Erb Tobias J.
Published: January 2020

The synthesis of complex molecules from simple, renewable carbon units is the goal of a sustainable economy. Here we explored the biocatalytic potential of the thiamine‐diphosphate‐dependent (ThDP) oxalyl‐CoA decarboxylase (OXC)/2‐hydroxyacyl‐CoA lyase (HACL) superfamily that naturally catalyzes the shortening of acyl‐CoA thioester substrates through the release of the C1‐unit formyl‐CoA. We show that the OXC/HACL superfamily contains promiscuous members that can be reversed to perform nucleophilic C1‐extensions of various aldehydes to yield the corresponding 2‐hydroxyacyl‐CoA thioesters. We improved the catalytic properties of Methylorubrum extorquens OXC by rational enzyme engineering and combined it with two newly described enzymes—a specific oxalyl‐CoA synthetase and a 2‐hydroxyacyl‐CoA thioesterase. This enzymatic cascade enabled continuous conversion of oxalate and aromatic aldehydes into valuable (S)‐α‐hydroxy acids with enantiomeric excess up to 99 %.