bluuebunny/crossref_metadata_2025_split huggingface dataset:
Sutureless bioprosthesis for aortic valve replacement: surgical and clinical outcomes
Authors: Ferreira Ricardo , Rua Nuno , Sena André , Velho Tiago , Goncalves João , Junqueira Nádia , Almeida Ana G. , Nobre Angelo , Pinto Fausto 
Published: June 2022

Aortic valve stenosis is the most common adult valve disease in
industrialized countries. The ageing population and the increase in
comorbidities urge the development of safer alternatives to the current
surgical treatment. Sutureless bioprosthesis have shown promising
results, especially in complex procedures and in patients requiring
concomitant surgeries. Objectives: Assess the clinical and
hemodynamic performance, safety, and durability of the Perceval
prosthetic valve. Methods: This single
center retrospective longitudinal cohort study collected data of all
adult patients with aortic valve disease who underwent aortic valve
replacement with a Perceval prosthetic valve between
February 2015 and October 2020. Of the 196 patients included (mean age
77.20±5.08 years; 45.4% female; mean EuroSCORE II 2.91±2.20%), the
majority had aortic stenosis. Results: Overall mean cross-clamp
and cardiopulmonary bypass times were 33.31±14.09 and 45.55±19.04
minutes, respectively. Mean ICU and hospital stay were 3.32±3.24 and
7.70±5.82 days, respectively. Procedural success was 98,99%, as two
explants occurred. 4 valves were reimplanted due to intra-operative
misplacement. Mean transvalvular gradients were 7.82±3.62 mmHg.
Pacemaker implantation occurred in 12.8% of patients, new-onset atrial
fibrillation in 21.9% and renal replacement support was necessary in
3.1%. Early mortality was 2.0%. We report no structural valve
deterioration, strokes or endocarditis and one successfully treated
valve thrombosis. Conclusions: Our study confirms the excellent
clinical and hemodynamic performance and safety of a truly sutureless
aortic valve, up to 5-year follow-up. These results were consistent in
isolated and concomitant interventions, solidifying this device as a
viable option for treatment of isolated aortic valve disease.
ANATOMIC CHARACTERISTICS OF THE STEM OF MANGO (Mangifera spp.) IN BANDAR LAMPUNG
Authors: Syahputra M. Ramdan , Yulianty Yulianty , Lande Martha Lulus , Suratman Suratman 
Published: June 2022

Mango is one of the most widely grown plants in Indonesia. The characteristic that distinguishes one type of mango from another is to observe its anatomy. Anatomical research on the mango branch has not been done much, especially in Bandar Lampung. The purpose of this study was to determine the diameter and pith radius of the mango (Mangifera spp.) branch in Bandar Lampung City. This research was carried out from January to April 2021 at the Botanical Laboratory, Department of Biology, Faculty of Mathematics and Natural Sciences, University of Lampung. This study uses a survey method with Simple Random Sampling in 20 sub-districts in Bandar Lampung City. Parameters measured included tracheal diameter, tracheal density, arrangement and type of pith radius, pith radius height, and pith radius width. Data analysis used descriptive analysis by explaining the data obtained in the form of tables and photos. The results showed that there were differences in the average size of the tracheal diameter, tracheal density, height, and width of pith radius of the five mango branch samples. The average diameter of the largest trachea is found in Golek and the smallest tracheal diameter is found in Kweni. The highest average tracheal density is found in Arumanis and the smallest tracheal density is found in Golek. The arrangement and type of pith radius of the fifth mango are uniseriate and heterocellular. The average height of the largest pith radius is owned by Indramayu and the smallest is owned by Golek. While the average width of the largest pith radius is owned by Golek and the smallest is owned by Gedong.
The role of a recently discovered peptide—irisin—in physiological and pathological processes
Authors: Bagłaj-Oleszczuk Marta , Jankowska-Konsur Alina 
Published: June 2022

Abstract
Irisin, a cleaved fragment of fibronectin type III domain-containing protein 5 (FNDC5), was originally described as a factor stimulating browning of white adipose tissue, produced during physical exercise by skeletal muscles. However, irisin is not only a new and promising biomarker of metabolism; its expression has been found in a wide variety of tissues and organs such as the peripheral nerves, stomach, pancreas, and skin, and recent data also indicate its role in cancer. Numerous studies focus on the protective role of this protein, which could become an important factor in predicting disease risk, disease prognosis, or possible metastases in cancer patients. Possible use of irisin in therapy is also worth considering. The aim of this paper is to systematize knowledge on the role of irisin in patients and to draw attention to its role in skin diseases including acne vulgaris, psoriasis vulgaris, and hidradenitis suppurativa.
Sizes of Soil Chip Cut By a Continuously Operating Planting Hole Digging Machine with an Active Tillage Unit
Authors: Beloev Hristo , Long Nguyen Duc , Nhu Dau The , That Nguyen Duc 
Published: June 2022

Abstract
Planting hole digging is a minimal tillage method, which is beneficial in terms of reducing energy consumption and preventing erosion. Current popular planting hole diggers work intermittently, which results in low productivity. A continuous-operating hole digging machine with an active tillage unit can solve this issue. However, the theoretical basis for this type of digger has not yet been developed; this is also true for the issue of determining the chip thickness – one of the main technical characteristics which significantly influences energy and agrotechnical indicators of active soil tillage. This paper presents research results of determining the soil chip cut thicknesses and observing of new cutting surface under a continuous operation of hole digging machine with an active tillage unit. At the same time, impacts of factors such as the number of knives and the kinematic factor on soil chip sizes are studied. The soil chip size determination and investigation of influence of kinematic and structural parameters on it is conducted via numerical simulation using MATLAB software. The key factors include kinematic factor λf and the number of knives on one cross-section of the tiller’s rotor Z. When λf and Z increase, the maximum average thicknesses decrease gradually; and vice versa, the new specific cutting surface decreases almost linearly. The results are considered a basis for the selection of final parameters for the construction and operation of one machine to meet agronomic requirements.
Analysis of Selected Data from Robotic Milking Regarding to Heat Stress of Dairy Cows
Authors: Boďo Štefan , Lüttmerding Gabriel , Gálik Roman , Kunc Petr , Knížková Ivana , Gürdil Gürkan Alp Kagan 
Published: June 2022

Abstract
The paper presented is dedicated to investigation of the temperature-humidity index (THI) and its impacts on the performance parameters of dairy cattle. These parameters were recorded at four farms in the central Slovakia; the experiments took place three years. These parameters comprised milking time, time spent in the milking box, and connection time. The THI was calculated according to the standard formula and individual periods were established on the basis of achieved THI values. The results showed that the milking time and the time spent in the milking box were not reduced when the THI ranged from 68 to 71, with a daily milk yield of 28.96 kg. If the THI exceeded 72, the milking time and the time spent in the milking box were shortened, which was statistically confirmed. However, even with a daily milk yield of 31.27 kg, a reduction in the milking time and time spent in the milking box was reduced. This was caused by the THI higher than 68, which was also statistically confirmed. Based on the results obtained, the dairy cows respond to heat stress by reducing the milking time and reducing time spent in the milking box.
Preparation and physico-chemical study of fire retardant from chicken feathers and PP/PE composites
Authors: Mohammed Aliyu Danmusa , Alhassan Yusuf Rashidat 
Published: June 2022

Abstract
Chicken feathers were used to reinforce low density polyethylene (LDPE) and polypropylene (PP). The physico-mechanical and flame retardation properties of the composites were investigated. Properties such as tensile strength, elongation at break, flexural strength, and modulus as well as water absorbency were determined and the results obtained were analyzed. The composites were further characterized by SEM and FTIR analyses to study the surface morphology and evidence of composite formation respectively. The Young modulus of reinforced composites were greater than that of virgin samples. The fiber/Polypropylene samples were observed to have the highest value of Young modulus, with a value of 133.33 GPa, and tensile strength value of 16.93 MPa. TGA and flame retardant tests were carried out to investigate the flame propagation and thermal properties of the composites. The results showed that the mechanical properties of composites from polypropylene were better enhanced than those from the composites of polyethylene, with an overall increase in mechanical properties when compared to the virgin polymers used. From the TGA and flame retardant test, it was observed that the more the fiber load the more the formation of char layers in the samples, hence retards the flame formation and reduced prolonged burning and flame propagation.
Physico-chemical and sensory quality of pasteurized apple juices extracted by blender and cold pressing juicer
Authors: Ghinea Cristina , Prisacaru Ancuta Elena , Leahu Ana 
Published: June 2022

Abstract
Worldwide, one of the most consumed fruit juices is apple juice, preferred by both adults and children due to its authentic taste, but also due to its nutritional and health benefits. Apple juice contains sugars, malic acid, soluble pectin, vitamin C, phytochemicals and minerals. The production process influences the juice composition. There is a growing market for natural cloudy apple juice, even though fruit juice is mostly consumed as clear juice. The aim of this study was to obtain cloudy apple juice by using a blender and a cold pressing juicer for extraction and to evaluate their physico-chemical and sensory qualities. The apple juice samples were obtained from three different apple cultivars: “Gala”, “Braeburn” and “Golden Delicious”. After extraction, apple juice samples were pasteurized and cooled. In this study, physico-chemical analyzes (like moisture, water activity, pH, titratable acidity, total soluble solids, electrical conductivity, color parameters) were performed immediately after processing and at 7, 14, 21 days of storage at room temperature. The results showed that the investigated parameters of the apple juice samples varied differently depending on both the apple cultivar and the processing method used. Sensory analysis showed that certain types of apples can be suitable for extracting juice using a blender (“Golden Delicious”), while others such as “Gala” apples can be used to obtain juice by cold pressing.
Riemann-Roch theorem and Kodaira-Serre duality
Authors: Lesfari A. 
Published: June 2022

Abstract
The Riemann-Roch theorem is of utmost importance and a vital tool to the fields of complex analysis and algebraic geometry, specifically in the algebraic geometric theory of compact Riemann surfaces. It tells us how many linearly independent meromorphic functions there are having certain restrictions on their poles. The aim of this paper is to give two proofs of this important theorem and explore some of its numerous consequences. As an application, we compute the genus of some interesting algebraic curves or Riemann surfaces.
Generalizations of Libera integral operator for analytic functions
Authors: Yavuz Emel , Güney H. Özlem , Owa Shigeyoshi 
Published: June 2022

Abstract
Let 𝒜
p
be the class of functions f of the form

f

(
z
)

=

z

p

+

a

p
+
1

z

p
+
1

+

a

p
+
2

z

p
+
2

+
⋯

f\left( z \right) = {z^p} + {a_{p + 1}}{z^{p + 1}} + {a_{p + 2}}{z^{p + 2}} + \cdots

that are analytic in the open unit disk 𝕌. For f ∈ 𝒜
p
, new integral and differential operator
nf is considered. The object of the present paper is to discuss some interesting properties of
nf and to consider some examples for our results.
Consequences of the rs6265 (Val66Met) polymorphism in the BDNF gene in selected mental disorders and sport
Authors: Strońska Aleksandra , Boroń Agnieszka , Grzywacz Anna 
Published: June 2022

Abstract

Introduction: Brain-derived neurotrophic factor (BDNF) is a polypeptide of 247 amino acid residues and is widely distributed throughout the central nervous system of the CNS. It plays an important role in the survival, differentiation, growth, and development of neurons in the central nervous system. The human BDNF gene is located on chromosome 11 in the p13-14 region and covers approximately 70 kb. The gene has a complex structure as it consists of 11 exons (I-IX, plus Vh and VIIIh) and nine functional promoters. BDNF expression in the brain is relatively low but it is found in most major regions of the brain.

Material and methods: The gene encoding the brain-derived neurotrophic factor BDNF has many polymorphisms, but one of them mainly attracts the attention of researchers. This is a common, non-conservative polymorphism - rs6265 - a single nucleotide SNP polymorphism that results in an amino acid change – valine (Val) to methionine (Met) - at codon 66.

Results: Polymorphism rs6265 is associated with many neuropsychiatric disorders, including depression or a higher risk of addiction, but it also determines other features, such as e.g. sports performance. Few studies are investigating the relationship between rs6265 polymorphism and predisposition to play sports.

Conclusions: The results on the effect of rs6265 BDNF polymorphic variants on the risk of depression and addition are inconsistent, indicating a significant association in some studies and none in others. Therefore, more studies are needed to determine how rs6265 affects gene expression and function.
An International Analysis of Consumers’ Consciousness During the Covid-19 Pandemic in Slovakia and Hungary
Authors: Machová Renáta , Korcsmáros Enikő , Marča Roland , Esseová Monika 
Published: June 2022

Abstract

Research background: Due to the rapid spread of the COVID-19 virus and its pernicious effects on the economy, a great change can be observed in consumer attitudes towards shopping. Needless to say, the demand for necessities comes to the fore, and consumers need to face a lot of hindrances when it comes to the decision-making process. It should be emphasised that consumers have responsibilities and rights. One can legitimately raise the question. Are they familiar with either of the aforementioned facts?

Purpose: The main objective of the research is to analyse whether an increasing level of educational attainment affects consumer awareness in Hungary and Slovakia. Moreover, the paper investigates whether there are any significant differences in age groups regarding consumer awareness. Finally, the paper investigates whether there are any statistically significant interactions between the respondents’ gender, employment status and conscious saving attitudes.

Research methodology: Kendall’s tau-b correlation, the rank-based nonparametric Kruskal-Wallis H test, and the Loglinear analysis were used to examine the formulated hypotheses.

Results: It can be declared for both countries that an increasing level of educational attainment strongly affects consumers’ awareness. Furthermore, three major differences can be noticed in various age groups in the case of Hungary.

Novelty: Education and age affect consumers’ awareness, whilst gender and employment status affect saving attitudes.
An Exploratory Study on Preparers’ Perception of ESEF Reporting: Evidence from the Warsaw Stock Exchange
Authors: Miścikowska Daria 
Published: June 2022

Abstract

Research background: This paper focuses on the preparers’ opinion on reporting in the European Single Electronic Format (ESEF).

Purpose: The goal of the paper is to examine the preparers’ perception of adopting Inline XBRL as a fundamental technology to report annual consolidated financial statements under International Financial Reporting Standards (IFRS) within the ESEF framework.

Research methodology: In the present work, Poland was considered as a case study. Using the survey, we obtained evidence from 25 issuers of securities listed on the Warsaw Stock Exchange, whose financial reports were complied with IFRS.

Results: The questionnaires were completed in the majority by issuers with no previous experience in XBRL utilisation. One of the more significant findings to emerge from this study is that respondents could not be able to judge the appropriateness of Inline XBRL selection as a digital reporting format, or they disagreed with it. Furthermore, over half of them saw no need to extend this technology to other business reports, including non-financial reporting.

Novelty: The paper can offer valuable pre-insights into preparers’ perception of introducing Inline XBRL in the context of ESEF reporting and ensure initial feedback to the policy-makers responsible for ongoing and forthcoming digital reporting standards initiatives in the European Union.
The Intensity of Perception of Selected Personnel Risk Factors in the V4 Countries
Authors: Rozsa Zoltan , Belas Jaroslav , Metzker Zdenko , Klementová Iva 
Published: June 2022

AbstractResearch background:The intensity of the personnel risk perception in SMEs is a crucial factor contributing to the application of risk management practices.Purpose:The objective of the study is to identify the intensity of perception of personnel risks and their manifestation in the form of staff turnover, error rate, and employee effort to improve their performance in SMEs in the V4 countries.Research methodology:The 1,585 companies in the V4 countries were randomly selected and surveyed. The descriptive statistics and Pearson correlation coefficient (Chi-square and Z-score) were used for hypotheses verification.Results:The results show heterogeneity in the perception of personal risks in the V4 countries. Compared to the Czech Republic, the intensity of perception of personal risks differs in Hungary and Slovakia (p-value < 0.0001/0.0404). However, the perception of employee turnover is different in Hungary (p-value = 0.0078), but not in Slovakia and Poland (p-value = 0.5218/0.4268). Perceptions of employee skills differ in Hungary (p-value = 0.0253), while the differences in Slovakia and Poland are not statistically significant (p-value = 0.1104/0.2414). Performance improvement and competitiveness in the workplace differ in Slovakia and Hungary (p-value = 0.0134/<0.0001).Novelty:The study fills in the gap in the area of perceived personnel risks and their manifestations and provides valuable proposals for taking measures concerning the limitations of SMEs.
Analyzing the Effects of Food Imports on Food Production and Balance of Payments in Nigeria
Authors: Ugwu Ephraim , Efuntade Olubunmi , Ehinomen Christopher 
Published: June 2022

Abstract

Research background: Past measures to increase food production in Nigeria, were not effective enough to curb food imports and increase food production thus leading to a deficit balance of payment for the country and a total neglect of the agricultural sector.

Purpose: This study analyzes the effects of food imports on food production and Balance of Payments (BOP) in Nigeria from 1960 to 2020.

Research methodology: The Auto Regressive Distributed Lag (ARDL) bound cointegration test procedure is utilized.

Results: The empirical results show that food imports adversely affect food production both in the long and the short run. While for the BOP equations, food importation positively affected the country’s balance of payments in the long run. The short run error-correction term coefficients are signed negatively for both the food production and BOP equations. The results show that the gap between the equilibrium values and the actual value of the dependent variables are corrected with speed of adjustment equal to 40% and 85% annually. The stability test result on the food production equation showed that the null hypothesis of no stable residuals in both the short and long run are rejected, while the estimated model is not effective with stable recursive residuals for the BOP equation.

Novelty: The study therefore recommends that efforts should be geared towards boosting the country’s food production by encouraging foreign investors’ participation in the agricultural sector.
Hot Water Tuber Treatments for Management of Meloidogyne arenaria in Caladium Cultivars
Authors: Gu Mengyi , Hartman Robert D. , Desaeger Johan A. 
Published: June 2022

Abstract
Hot water treatment was evaluated for its efficacy in controlling Meloidogyne arenaria on caladium. Caladium tubers pre-infested with M. arenaria were immersed in hot water at 50°C for 0 min, 30 min, and 45 min before being planted into 16.5-cm pots filled with sterilized sandy soil. Two caladium cultivars Florida Sweetheart PP 8526 (SWT) and Postman Joyner (PJR), each with three tuber sizes [#3 (<1.5 inch), #1 (1.5–2.5 inch), and Jumbo (>2.5 inch)], were evaluated. Ninety days after the first shoot observation, the number of nematode eggs in roots and second-stage juveniles in soil were significantly reduced, but not eliminated, in both 30 min and 45 min treatments; the 45 min treatment had better results than the 30 min treatment. The efficacy of hot water treatment was affected by caladium cultivar, but not by tuber size. The treated PJR tubers had lower nematode numbers than those of the cultivar SWT. The difference in nematode number between the two caladium cultivars might be related to the morphological characteristics of caladium tubers, as the scale-like tissue on SWT tubers might provide refuge for root-knot nematodes from heat damage. Further research needs to be conducted on determining heat-tolerant thresholds for different Meloidogyne spp. and different caladium cultivars, which will help improve nematode management strategies for caladium growers.