bluuebunny/crossref_metadata_2025 huggingface dataset:
Classification of respiratory tract picornavirus isolates as enteroviruses or rhinoviruses by using reverse transcription-polymerase chain reaction
Authors: Atmar R L , Georghiou P R
Published: January 2020

The classification of picornaviruses isolated from respiratory secretions as human rhinoviruses (HRVs) or enteroviruses (EVs) by using reverse transcription-polymerase chain reaction was compared to that derived from acid lability testing. Of the 135 clinical isolates examined, 91 were found to be HRVs and 44 were EVs. There was 100% concordance between the two classification methods. Reverse transcription-polymerase chain reaction is an effective alternative to traditional methods for differentiating HRVs from EVs.
Replicative Hybrid of T4 Bacteriophage DNA
Authors: Emanuel Beverly S.
Published: January 2020

Hybrid density replicative T4 DNA was isolated from CsCl, sheared, and reanalyzed in CsCl. The results rule out a branched model for T4 DNA replication and confirm that T4 DNA replicates to a conventional, semiconservative, colinear hybrid.
Physical and Chemical Properties of an Oncornavirus Associated with a Murine Adrenal Carcinoma Cell Line
Authors: Burnette W. Neal , Riggin Charles H. , Mitchell William M.
Published: January 2020

A type C oncornavirus has been isolated from a continuous cell line of murine adrenal carcinoma in culture. The particles have a buoyant density of 1.165 g/cm
3
, exhibit typical type C morphology by electron microscopy, possess an RNA-dependent DNA polymerase, and have a high molecular weight RNA (6.1 × 10
6
) which can be denatured to a homogeneous lower molecular weight species (3.2 × 10
6
) when extracted from rapidly harvested “immature” virions. The virus is related antigenically to other mammalian oncornaviruses and exhibits a similar, although much more complex, sodium dodecyl sulfate gel electrophoretic profile of virion proteins when compared to the profiles of other type C RNA tumor viruses.
Isolation and Characterization of a Temperate Bacteriophage Specific for
Rhodopseudomonas spheroides
Authors: Mural R. J. , Friedman D. I.
Published: January 2020

The isolation of a temperature phage specific for the photosynthetic bacterium
Rhodopseudomonas spheroides
is reported. This phage, Rφ-1, establishes a state of lysogeny and can be induced from the prophage state by exposure to mitomycin C or UV irradiation. Mutants of Rφ-1 which grow on a standard laboratory strain (2.4.1) of
Rhodopseudomonas spheroides
were isolated. Although the original Rφ-1 isolated was chloroform sensitive, the mutant which plates on strain 2.4.1 is chloroform resistant. Rφ-1 does not grow on closely related bacteria, such as
Rhodopseudomonas palustris
or
Rhodopseudomonas capsulata.
Rφ-1 mutants forms plaques with the same efficiency whether the plates are incubated under aerobic conditions in the dark or under anaerobic conditions in the light (phototropic conditions).
Six-NB-tropic murine leukemia viruses derived from a B-tropic virus of BALB/c have altered p30
Authors: Hopkins N , Schindler J , Hynes R
Published: January 2020

We have examined the electrophoretic mobility on sodium dodecyl sulfate-polyacrylamide gels of three virion proteins of B-tropic murine leukemia virus from BALB/c and six of its NB-tropic derivatives. The gp70 protein and a 13,000-molecular-weight virion protein tentatively identified as p15 of the NB-tropic viruses migrated with the corresponding B virus proteins. However, the major internal structural protein of type C virions, p30, of all the NB-tropic viruses migrated more rapidly than the p30 of their B virus progenitor. Although this change in p30 raises the possibility that p30 may be involved in determining the N-, B-, or NB-tropism of MuLV's, it is also possible that the change accompanies but does not directly determine the change in tropsim.
Feline Herpesvirus Infection in Fused Cultures of Naturally Resistant Human Cells
Authors: Tegtmeyer Peter , Enders John F.
Published: January 2020

Feline herpesvirus (FHV) attaches to, but does not penetrate, naturally resistant human embryonic lung cells. When the cells with attached virus are subsequently fused with inactivated Sendai virus, FHV causes characteristic cytopathic effects, but no infectious virus can be recovered from the infected cells.
Heterologous interference in Aedes albopictus cells infected with alphaviruses
Authors: Eaton B T
Published: January 2020

Maximum amounts of 42S and 26S single-stranded viral RNA and viral structural proteins were synthesized in Aedes albopictus cells at 24 h after Sindbis virus infection. Thereafter, viral RNA and protein syntheses were inhibited. By 3 days postinfection, only small quantities of 42S RNA and no detectable 26S RNA or structural proteins were synthesized in infected cells. Superinfection of A. albopictus cells 3 days after Sindbis virus infection with Sindbis, Semliki Forest, Una, or Chikungunya alphavirus did not lead to the synthesis of intracellular 26S viral RNA. In contrast, infection with snowshoe hare virus, a bunyavirus, induced the synthesis of snowshoe hare virus RNA in both A. Ablpictus cells 3 days after Sindbis virus infection and previously uninfected mosquito cells. These results suggested that at 3 days after infection with Sindbis virus, mosquito cells restricted the replication of both homologous and heterologous alphaviruses but remained susceptible to infection with a bunyavirus. In superinfection experiments the the alphaviruses were differentiated on the basis of plaque morphology and the electrophoretic mobility of their intracellular 26S viral RNA species. Thus, it was shown that within 1 h after infection with eigher Sindbis or Chikungunya virus, A. albopictus cells were resistant to superinfection with Sindbis, Chikungunya, Una, and Semliki Forest viruses. Infected cultures were resistant to superinfection with the homologous virus indefinitely, but maximum resistance to superinfection with heterologous alphaviruses lasted for approximately 8 days. After that time, infected cultures supported the replication of heterologous alphaviruses to the same extent as did persistently infected cultures established months previously. However, the titer of heterologous alphavirus produced after superinfection of persistently infected cultures was 10- to 50-fold less than that produced by an equal number of previously uninfected A. albopictus cells. Only a small proportion (8 to 10%) of the cells in a persistently infected culture was capable of supporting the replication of a heterologous alphavirus.
Phi W-14 DNA inhibits transfection of Bacillus subtilis by SPP1 DNA
Authors: Lopez P , Espinosa M , Piechowska M , Shugar D , Warren R A
Published: January 2020

The DNA of bacteriophage phi W-14 is unusual in that half of the thymine residues are replaced with the hypermodified pyrimidine alpha-putrescinylthymine (Kropinski et al., Biochemistry 12:151-157, 1973). Bacteriophage phi W-14 DNA and Bacillus subtilis DNA exhibited comparable competing abilities for the uptake of transfecting bacteriophage SPP1 DNA by competent cells of B. subtilis. B. subtilis DNA decreased transfection and uptake to the same extent, indicating that it merely competed with SPP1 DNA for uptake. Phi W-14 DNA, however, decreased transfection up to 30 times more effectively than it inhibited uptake. Phi W-14 DNA did not alter the kinetics of transfection. The degree of inhibition of transfection was dependent upon the time of addition of Phi W-14 DNA relative to the time of addition of SPP1 DNA. If failed to inhibit when added 30 min after SPP1 DNA. It had a fourfold-greater effect when added 10 min before, rather than simultaneously with, SPP1, but this enhancement was abolished by high concentrations of SPP1 DNA. The nature of the transfection process was not altered in those cells escaping inhibition by Phi W-14 DNA: two molecules of transfecting SPP1 DNA were required to form a transfectant with or without Phi W-14 DNA. Free putrescine did not affect transfection by SPP1 DNA. It was concluded that the putrescine groups covalently attached to phi W-14 DNA allowed this DNA to interfere with the transfection process at the intracellular level.
Deoxyribonucleic Acid Synthesis in Insect Larvae After Inoculation with Nucleopolyhedrosis Virus
Authors: Carnegie J. W. , Beaudreau G. S.
Published: January 2020

Studies of deoxyribonucleic acid synthesis following inoculation with nucleo-polyhedrosis show a large burst of viral deoxyribonucleic acid synthesis late in the infection period.
Restriction endonuclease and nucleotide sequence analyses of molecularly cloned unintegrated avian tumor virus DNA: structure of large terminal repeats in circle junctions
Authors: Katz R A , Omer C A , Weis J H , Mitsialis S A , Faras A J , Guntaka R V
Published: January 2020

Avian tumor virus supercoiled DNA was isolated from infected quail tumor cells and molecularly cloned in pBR322. Four different recombinant clones denoted pATV-6, pATV-7, pATV-8, and pATV-9 were characterized in detail by restriction endonuclease mapping and by DNA sequencing. The results of these studies indicate that (i) the two large terminal repeats (LTRs) present in PATV-6, are different sizes, (ii) pATV-8 and pATV-9 contain only one LTR, (iii) pATV-7 contains an inversion of 0.6 kilobase in the env gene and a deletion of the U3 region and the src gene, and (iv) the src gene is deleted in pATV-6 and pATV-9. Circle formation from linear molecules was also examined in several of the clones by DNA sequencing through the circle joint. pATV-6 is an example of one class of circular molecules and contains a partially repeated LTR similar to that reported by Ju and Skalka (Cell 22:379-386, 1980). A second class of circles was exemplified by pATV-8 and pATV-9, which contain a single copy of the LTR with no base changes or deletions. This is in contrast to a class of circles containing a complete double LTR structure described by Swanstrom et al. (Proc. Natl. Acad. Sci. U.S.A. 78:124-128, 1981) and suggests that circles containing a single intact LTR may be formed by a homologous recombinational event in which an entire LTR or complementary regions from both LTRs are removed from the linear DNA molecule during circularization.
Nucleotide sequence and organization of the adeno-associated virus 2 genome
Authors: Srivastava A , Lusby E W , Berns K I
Published: January 2020

The complete nucleotide sequence of the adeno-associated virus 2 genome was determined. The single-stranded genome is 4,675 nucleotides in length and contains inverted terminal repeats of 145 nucleotides, the first 125 nucleotides of which form a palindromic sequence. Within the inverted terminal repetitions, there are two distinct sequences representing an inversion of 43 nucleotides that can exist on either terminus. The 5' and 3' termini of three major mRNA transcripts, which are present in both spliced and unspliced forms, were also mapped on the viral genome. Potential initiation and termination codons for efficient protein synthesis were identified, and genome segments were assigned that code for three major viral capsid proteins and, possibly, some as-yet-unidentified, nonstructural viral proteins.
Detection, purification, and characterization of two species of covalently closed circular proviral DNA molecules of bovine leukemia virus
Authors: Kashmiri S V , Mehdi R , Ferrer J F
Published: January 2020

Cocultivation of uninfected and bovine leukemia virus-producing bat cells yielded, in addition to the unintegrated linear DNA duplex, DNA molecules that migrated as 4.4- and 4.8-kilobase-pair DNA fragments in gel electrophoresis. These DNA molecules were purified by acid-phenol extraction and cleaved with restriction endonucleases EcoRI, and HindIII, which have one recognition site each on the bovine leukemia virus proviral DNA. Such cleavage generated DNA molecules of approximately 10.0 and 9.4 kilobase pairs, thus indicating the existence of two species of covalently closed circular molecules of bovine leukemia virus proviral DNA.
Conditional synthesis of an aberrant glycoprotein mRNA by the internal deletion mutant of vesicular stomatitis virus
Authors: Herman R C
Published: January 2020

The internal deletion mutant (DI-LT) derived from the heat-resistant strain of vesicular stomatitis virus synthesizes an aberrant polyadenylated mRNA (G*) containing a transcript of the partially deleted polymerase gene covalently linked to the 3' end of the glycoprotein message (R. C. Herman and R. A. Lazzarini, J. Virol. 40:78-86, 1981). The heat-resistant polymerase appears to play a role in the synthesis of the abnormal G* RNA. The synthesis of G* correlated directly with the presence of the heat-resistant L protein on the defective interfering particle template. Chimeric defective interfering particles produced by passaging DI-LT with a helper virus that encodes the wild-type vesicular stomatitis virus polymerase did not synthesize G*. The subsequent passage of the chimeric DI-LT with a heat-resistant helper virus restored the ability to synthesize the G* transcript. These results imply that the regulatory signals normally present at the vesicular stomatitis virus G/L intercistronic boundary may be preserved in DI-LT. These sequences are only conditionally functional because they are recognized correctly by the wild-type but not by the heat-resistant polymerase.
Monoclonal antibodies to respiratory syncytial virus proteins: identification of the fusion protein
Authors: Walsh E E , Hruska J
Published: January 2020

Six monoclonal antibodies directed against respiratory syncytial virus proteins were produced. Each was characterized by immunoprecipitation and indirect immunofluorescence. One was directed against the nucleocapsid protein. NP 44, two were directed against a 37,000-dalton protein, two were directed against the major envelope glycoprotein, GP 90, and one was directed against the 70,000-dalton envelope protein, VP 70. Indirect immunofluorescence stain patterns of infected HEp-2 cells defined GP 90 and VP 70 as viral proteins expressed on the cell surface, whereas NP 44 and the 37,000-dalton protein were detected as intracytoplasmic inclusions. One of the anti-GP 90 antibodies neutralized virus only in the presence of complement but did not inhibit cell-cell fusion. The anti-VP 70 antibody neutralized virus without complement and inhibited cell-cell fusion of previously infected HEp-2 cells, thus identifying VP 70 as the fusion protein.
Dwell-fatigue crack growth mechanisms of titanium alloy Ti-6Al-4V at room-temperature
Authors: Wang Ke , Sun Xiaopeng , Li Yongzheng , Wei Pengyu , Liu Jiarui , Bian Chao , Zhang Shixing , Huang Xiangyu
Published: January 2020

Ti-6Al-4V alloy is widely used for the deep-sea manned submersible. In addition to the normal cyclic loading, the manned cabin will experience a period of dwell time in each cycle during their service life. In this research, the fatigue and dwell-fatigue crack growth behavior of Ti-6Al-4V alloy under different dwell time were studied experimentally. The mechanism of dwell-fatigue crack growth was investigated. The acceleration phenomenon of the dwell-fatigue crack growth can be directly observed in the experiment. The relationship between the crack length and the dwell time was captured under different [Formula: see text] within one cycle. The results presented that there is a saturation time for the dwell-fatigue crack growth. A prediction model is proposed to predict the dwell-fatigue crack growth behavior considering the effects of dwell time.
Inhibition of Mild Steel Corrosion in 1M Hydrochloric Medium by the Methanolic Extract ofAmmi visnagaL. Lam Seeds
Authors: Zaher Aouatife , Chaouiki Abdelkarim , Salghi Rachid , Boukhraz Asmaa , Bourkhiss Brahim , Ouhssine Mohammed
Published: January 2020

The chemical composition of the methanolic extract ofAmmi visnaga(Khella) seeds from the Sidi Slimane region is determined for the first time by Gas Chromatography coupled with Mass Spectrometry (GC/MS). Ten compounds representing 99.638% of the total extract were identified. Khellin (49.011%), Visnagin (26.537%) and Dimethylethylamine (15.108%) are the major components. Moreover, the inhibitory effect of the Methanolic extract of the seeds ofAmmi visnagaon the corrosion of mild steel in a solution of 1M HCl is determined using weight loss measurements, the potentiodynamic technique as well as the technique of electrochemical impedance spectroscopy (EIS). It is found that the extract reduces the corrosion rate of the steel in the acid solution. Inhibition efficiency increases as the concentration of the extract increases. The tested compound has an inhibition efficiency of 84% for a concentration equal to 1.0 g/L. The polarization measurements indicate that the examined extract acts as a mixed inhibitor with predominant anodic efficacy. The data obtained from EIS studies are analyzed to model this process using appropriate equivalent circuit models. The adsorption of the extract on the surface of the mild steel obeys the Langmuir adsorption isotherm in acidic medium and the activation is determined and discussed.
Gymnopilus dunensis, a new species from Punjab province, Pakistan

Authors: BASHIR HIRA , JABEEN SANA , BASHIR HUMAIRA , KHALID ABDUL NASIR
Published: January 2020

Gymnopilus dunensis is described as a new species from Punjab province Pakistan, based on internal transcribed spacer (ITS) sequence data and morphological characters. Presence of grey scales on the pileus, slightly radicating and fibrillose stipe that is white at the apex and orange-brown at the base, and its unique phylogenetic position confirm that this is a new species. It is also different to other species of Gymnopilus because it is found in a semi-arid desert environment.
Calanthe tsiana, a new orchid species from China (Epidendroideae: Collabieae): evidence from morphological and molecular analyses

Authors: CHEN YAN-QIONG , ZHU YA-TING , ZHONG HUI , LI ZE-XIN , LIU ZHONG-JIAN , ZHAI JUN-WEN , LAN SI-REN
Published: January 2020

A new orchid, Calanthe tsiana, is described from southeastern Yunnan, China, based on morphological and DNA evidence. In morphological comparisons, C. tsiana is similar to C. arisanensis, but it differs in having subspatulate petals and falcate-obovate lateral lobes of lip with one ridge on the disk. The phylogenetic analyses based on nuclear ribosomal ITS and plastid DNA (rbcL, matK and trnL-trnF) place C. tsiana with C. arisanensis as sister species and support C. tsiana as a new species.
Iatrogenic endometriosis following apical pelvic organ prolapse surgery: a case report
Authors: Cubuk Alkan , Ozkaptan Orkunt , Neymeyer Jörg
Published: January 2020

Background

Iatrogenic endometriosis is the presence of endometrial glands and stroma out of the uterus following certain surgical interventions. The rate of iatrogenic endometriosis after gynecologic surgeries due to benign uterine disease is 1–2%. Laparoscopic supracervical hysterectomy is also a part of frequently used surgical treatment of apical pelvic organ prolapse, which is followed by sacrocervicopexy. However, there are no data about iatrogenic endometriosis after apical prolapse surgery in the current literature. Herein, we present a case report of a patient diagnosed with de novo endometriosis 1 year after laparoscopic supracervical hysterectomy and sacrocervicopexy.

Case presentation

A 46-year-old parous Slavic woman who underwent laparoscopic supracervical hysterectomy and sacrocervicopexy secondary to grade 3 symptomatic apical prolapse 1 year earlier was admitted to the same clinic with pelvic pain that had started 6 months following surgery. Deep vaginal palpation was painful. Transvaginal ultrasonography revealed an area with hypervascularization on the sacral promontory. She was scheduled for diagnostic laparoscopy. A 2 × 2-cm solid, wine-colored, hypervascular hemorrhagic lesion was seen on the sacral promontory. The lesion and the peritoneal layer behind it were totally excised. The patient was discharged on the first postoperative day, without any complications. Pathologic examination revealed foci of endometriosis comprising endometrial glands and stroma within the connective tissue, along with hemosiderin-laden macrophages. The symptoms of the patient resolved after the surgery, and no further adjuvant treatment was needed.

Conclusion

Although the rate of iatrogenic endometriosis is low after laparoscopic supracervical hysterectomy and sacrocervicopexy, the possibility of the occurrence of iatrogenic endometriosis should be discussed with patients who are diagnosed with apical prolapse to determine the type of surgical intervention. Iatrogenic endometriosis should be kept in mind for differential diagnosis in case of pain after laparoscopic supracervical hysterectomy and sacrocervicopexy.
Low Tidal Volumes Are Associated With Slightly Improved Oxygenation in Patients Having Cardiac Surgery: A Cohort Analysis
Authors: Jia Yuan , Leung Steve M. , Turan Alparslan , Artis Amanda S. , Marciniak Donn , Mick Stephanie , Devarajan Jagan , Duncan Andra E.
Published: January 2020

BACKGROUND:

Mechanical ventilation with low tidal volumes appears to provide benefit in patients having noncardiac surgery; however, whether it is beneficial in patients having cardiac surgery is unclear.

METHODS:

We retrospectively examined patients having elective cardiac surgery requiring cardiopulmonary bypass through a median sternotomy approach who received mechanical ventilation with a single lumen endotracheal tube from January 2010 to mid-August 2016. Time-weighted average tidal volume (milliliter per kilogram predicted body weight [PBW]) during the duration of surgery excluding cardiopulmonary bypass was analyzed. The association between tidal volumes and postoperative oxygenation (measured by arterial partial pressure of oxygen (Pao
2)/fraction of inspired oxygen ratio [Pao
2/Fio
2]), impaired oxygenation (Pao
2/Fio
2 <300), and clinical outcomes were examined.

RESULTS:

Of 9359 cardiac surgical patients, larger tidal volumes were associated with slightly worse postoperative oxygenation. Postoperative Pao
2/Fio
2 decreased an estimated 1.05% per 1 mL/kg PBW increase in tidal volume (97.5% confidence interval [CI], −1.74 to −0.37; P
Bon = .0005). An increase in intraoperative tidal volumes was also associated with increased odds of impaired oxygenation (odds ratio [OR; 97.5% CI]: 1.08 [1.02–1.14] per 1 mL/kg PBW increase in tidal volume; P
Bon = .0029), slightly longer intubation time (5% per 1 mL/kg increase in tidal volume (hazard ratio [98.33% CI], 0.95 [0.93–0.98] per 1 mL/kg PBW; P
Bon < .0001), and increased mortality (OR [98.33% CI], 1.34 [1.06–1.70] per 1 mL/kg PBW increase in tidal volume; P
Holm = .0144). An increase in intraoperative tidal volumes was also associated with acute postoperative respiratory failure (OR [98.33% CI], 1.16 [1.03–1.32] per 1 mL/kg PBW increase in tidal volume; P
Holm = .0146), but not other pulmonary complications.

CONCLUSIONS:

Lower time-weighted average intraoperative tidal volumes were associated with a very modest improvement in postoperative oxygenation in patients having cardiac surgery.
A WEIGHT-OF-EVIDENCE APPROACH TO THE ASSESSMENT OF ECOLOGICAL RISK FROM HISTORICAL CONTAMINATION OF OTTAWA RIVER SEDIMENTS NEAR CHALK RIVER LABORATORIES
Authors: Bond Matthew J. , Silke Renee , Stuart Marilyne , Carr Jamie , Rowan David J.
Published: January 2020

Canadian Nuclear Laboratories’ Chalk River Laboratories (CRL) site is situated on the banks of the Ottawa River, about 180 km northwest of the City of Ottawa. Since 1947, the Ottawa River has received effluent from CRL’s operations. Since this time, and in particular during the operation of the national research experimental research reactor (1947–1992), radionuclides (mainly 60Co and 137Cs) and mercury released in effluents have accumulated in deep-water sediments downstream of CRL. In the following, we present a holistic summary of characterization of the historical contamination and ecological risk assessment work completed to date. The evaluation included (i) comparisons of recommended benchmark dose and screening levels with concentrations in water and sediment, (ii) determination of relevant exposure pathways and biological receptors, (iii) measured and (or) modelled contaminant exposure to benthic receptors and trophic transfer of contaminants to upper trophic level receptors, (iv) whole-sediment laboratory toxicity tests using benthic invertebrates and fish, and (v) field studies assessing possible intermediate or long-term effects on aquatic biota at the population and community levels. The ecological risk related to the contaminated sediment site was assessed using multiple lines of evidence and a weight-of-evidence approach. Despite concentrations of anthropogenic radionuclides and mercury above screening levels in Ottawa River sediments near CRL, the laboratory toxicity tests, radiological dose and mercury bioaccumulation modelling, and biological surveys of benthic invertebrates and fish indicated no significant adverse effects. Ecological risk to Ottawa River benthic invertebrates, fish, fish-eating birds and mammals from historical sediment contamination near CRL is low-to-negligible, and levels of risk will continue to decline as sediment-bound radionuclides decay and contamination is buried by new sediment.
SITE SELECTION FOR CANADA’S NATIONAL REPOSITORY FOR USED NUCLEAR FUEL
Authors: Ben Belfadhel Mahrez , Watts Bob , Facella Jo-Ann
Published: January 2020

In 2007, the Government of Canada selected Adaptive Phased Management as Canada’s plan for the long-term management of Canada’s used nuclear fuel. The approach provides for containment and isolation of the material in a deep geological repository at a safe site with an informed and willing host. The Nuclear Waste Management Organization is tasked through federal legislation with selecting the site and developing and managing all aspects of the plan. In May 2010, the organization published and initiated the site selection process that serves as a road map for decision making on the location for the deep geological repository. It continues to lead the site selection process for the repository and an associated Centre of Expertise. The screening process is advancing and, from an initial starting point of 22 communities expressing interest in learning about the project; as of September 2015, 9 communities are the focus of more detailed technical and community well-being studies. Preliminary Assessments, the third step in the 9-step site selection process are underway in these communities. The Assessments involve preliminary technical and social desktop and field assessments, engagement activities within and beyond each interested community, and involvement of Indigenous peoples and nearby municipalities in the planning and conduct of the work. This paper provides an update on the advancement of the site selection process. It describes the nature of the technical and social studies being conducted at this phase of work, including the progressively more detailed field studies that are the focus of technical work at the current stage, the approach to engagement and collaboration with communities to direct these studies, and the work underway to ensure the framework used for this assessment and engagement includes the range of priorities and perspectives of First Nations and Métis peoples and communities in the broader area.
Analytical support for enterprise’s development management under conditions of economy digitalization
Authors: Orlova Kateryna , Ovander Nataliia
Published: January 2020

The article defines the essence and structure of analytical support for enterprise’s development management. The key indicators of Ukrainian enterprises activity have been analyzed, that made it possible to reveal the necessity of improvement of processes of managerial decisions substantiation and implementation. It has been defined that formation of the appropriate analytical support is an important precondition of managerial decisions rationality providing. It has been proposed to identify analytical support as a subsystem of general system of enterprise management, which is the organizational unity of informational, technical, personnel, methodological resources, which in their entirety provide support for managerial decision-making and implementation of decisions processes. The functions and forms of analytical support have been considered. It has been determined that the structure of analytical support for enterprise’s development management includes the following components: informational, methodological, personnel, software. The peculiarities of formation and functioning of each defined component have been considered.
Healthy beverage consumption among aging Thai consumers
Authors: Sapsanguanboon Watcharapoj , Daoruang Runchida
Published: January 2020

This study analyzes the trends of healthy beverage consumption of aging consumers in central Thailand. It examines the relationship between demography and beverage consumption behavior of aging consumers. A questionnaire survey is used to collect information on healthy beverage consumption behavior and consumers’ demography. An in-depth interview is employed to explore the general preferences related to healthy beverage consumption of aging consumers in central Thailand. The results show that aging consumers in central Thailand are health conscious. They pay more attention to food and beverage consumption, which has both functional and emotional benefits. As such, the demand for healthy beverage consumption increases with age. Fruit or vegetable juice is the best choice for them. However, their dietary requirements depend on individual, social, and environmental factors in addition to age. Particularly, their income sources and living conditions are important, because they have a direct effect on healthy beverage consumption.
Revising Hong Kong’s midstream operation: A discussion on the Port Feeder Barge concept
Authors: Lau Yui Yip , Malchow Ulrich
Published: January 2020

Midstream operation (MSO) has played an important role in Hong Kong's port business since the 1960s. MSO has been seriously neglected in maritime transport research in the past. In the course of filling this significant research gap, we aim to address how a new type of harbor vessel – Port Feeder Barge (PFB) can strengthen the sustainability and attractiveness of MSO in Hong Kong and of the port in general. By introducing such type of vessel MSO becomes much safer and faster, much more efficient with less manpower being needed, provides higher flexibility and causes less environmental impact compared to the traditional Hong Kong midstream barges (HK barges). Due to its special layout as a deck carrier the PFB is also very well suited to be optionally fuelled with Liquefied Natural Gas (LNG) which would result into an ultimate "green" harbor vessel. Semi-structured, in-depth interviews with a number of maritime professionals involved in MSO activities in Hong Kong have revealed how PFBs could be employed in MSO, the potential regulatory issues and operating challenges and the critical success factors for further PFB deployment in the Asia-Pacific region. The study provides insights how the PFB could provide notable advantages for a sustainable recovery of MSO in Hong Kong.
Bicycling in Addis Ababa, Ethiopia: Opportunities and challenges
Authors: Tulu Getu Segni , Hadgu M. , Tarekegn A.G.
Published: January 2020

Addis Ababa is urbanizing at an increasing rate. Mobility problems and related negative impacts of motorized traffic and associated road safety issues remained to be a big challenge to the city. Improved cycling environment can play a greater role in solving those issues through reducing the exposure to risk of crashes and leading to a sustainable urban transportation. Among others, the benefits of increased level of bicycling are; health and physical fitness, clean environment, safe and cheap mode of transportation, particularly for a developing city like Addis Ababa. Regardless of the significant benefits of bicycling, the use of the bicycle as a mode of transportation in Addis Ababa is currently negligible and understudied. Furthermore, the cycling environment of the city faces many challenges. Some of the challenges are; lack of bicycle infrastructures, poorly maintained infrastructure, lack of bicycle policy and strategy. The supply of bicycle with reasonable price and lack of awareness of the benefits of using cycling as a mode of transportation are also another issue in the city. This paper is prepared to provide a review of the literature on the opportunities and challenges of bicycling in Addis Ababa. It focuses on evidence of (i) the opportunities of bicycling along with its challenges, and (ii) the current status of the cycling environment in the city. The main objective of this paper is to collect evidences that outline the potentials and problems the city faces to achieve a better cycling environment. It is expected to provide important information that can be used by transport planners, policy makers and researchers of the city improve the cycling environment. Going forward, the city has the intention to prioritize Non-Motorized Transport, including cycling in the city.
The Lightboard: Expectations and Experiences
Authors: McCorkle Sarah , Whitener Paul
Published: January 2020

This case study describes a small-scale Lightboard pilot and a full-scale Lightboard build with accompanying studio at a small, private liberal arts college in the southern United States. This article will provide an overview of the Lightboard landscape in higher education, offer considerations for the construction of a Lightboard, and share the authors’ experiences and outcomes. In writing this article, the authors’ goal is to present an attainable use case for the construction of a Lightboard by introducing a simplistic pilot design that was well received by faculty and administrators.
نسبة مساهمة بعض العوامل المؤثرة في تنفيذ درس التربية الرياضية
Authors: Mustafa Ibrahim M.
Published: January 2020

إنَّ عملية التدريس هي عبارة عن سلسلة من العلاقات المستمرة تنشأ بين المعلم والطالب والمنهج ، وإنَّ هذه العلاقات تساعد الطالب على التطور بوصفه فردا أو مشاركا في نشاط أو فعالية معينة ويمتلك مستوى معين من المهارة في الانشطة البدنية، و درس التربية الرياضية هو  واحد من القواعد الأساسية في تحقيق الأهداف التربوية والتعليمية بالمدرسة ، فالعناية بدرس التربية الرياضية يشكل الخطوة الأولى والمهمة التي بواسطتها تجنى الفوائد الموجودة في المنهاج المقرر، و يعد درس التربية الرياضية في المرحلة المتوسطة من أهم المراحل الأساسية في النظام التربوي،  لأنَّ الطلبة يمرون فيها بمرحلة المراهقة والبلوغ . وهدفت البحث الى التعرف على بعض العوامل التي تؤثر في تنفيذ درس التربية الرياضية في المرحلة المتوسطة، والتعرف على أهم المعالجات العلمية الصحيحة و الملائمة لأهداف الدرس والمنهج و برامج التربية الرياضية، وشملت عينة البحث تدريسيي محافظة أربيل، و إستعمال  إستمارة  إستبيان لجمع البيانات، و توصل الباحث إلى أنَّ زيادة عدد الطلبة لم تؤثر بدرجة كبيرة على نجاح الدرس، كما أنَّ الطلبة لديهم رغبة جيدة للمشاركة في الدرس، كما توصل إلى أنَّ هناك رغبة كبيرة من قبل التدريسيين للقيام بواجبهم، و أيضاً إن إدارات المدارس مهتمة بدروس التربية الرياضية، و متعاونة مع التدريسي والطلبة لكن ليس بدرجة كبيرة، و أوصى الباحث العمل على توجيه إدارات المدارس للإهتمام بدروس التربية الرياضية و عدم إجبار التدريسي على إعطاء حصته الى تدريسي آخر .
أسلوب (الاستقلال - الاعتماد) على المجال الادراكي وعلاقته بتحصيل فعالية الوثب الثلاثي
Authors: Kareem Farhad I.
Published: January 2020

يهدف البحث الى التعرف على أسلوب الاستقلال – الاعتماد لدى افراد عينة البحث .التعرف على مستوى التحصيل لدى طلب المرحلة الثانية سكول التربية الرياضية –جامعة كويه في فعالية الوثب الثلاثي.التعرف على العلاقة  الارتباطية بين الاسلوب المعرفي (الاستقلال – الاعتماد) وتحصيل أفراد عينة البحث في فعالية الوثب الثلاثي . استخدم الباحث المنهج الوصفي لملائمته وطبيعة البحث، وتمثل مجتمع البحث من طلبة المرحلة الثانية في سكول التربية الرياضية – جامعة كويه والبالغ عددهم(57)طالب وطالبة، وتم اختيار (34) طالب لعينة البحث بالطريقة  العشوائية والتعرف على قوة واتجاه العلاقة الارتباطية بين أسلوب (الاستقلال –الاعتماد) والتحصيل لأفراد عينة البحث في فعالية الوثب الثلاثي وتحقيقاً لأهداف الدراسة واختبار فرضيتها لدراسة  العلاقات الارتباطية، ومن خلال تحليل النتائج ومناقشتها النتائج باستخدام قانون ارتباط (بيرسون). تم جمع البيانات ومعالجتها   إحصائياً ومن خلالها تم التوصل إلى عدة استنتاجات أهمها : بلغ  عدد الطلاب المستقلين (22) طالب من طلاب عينة البحث ،في  حين كان عدد الطلاب المعتمدين (12) طالب . العلاقة التي ظهرت بين اسلوب الاستقلال -الاعتماد وتحصيل طلاب عينة البحث في فعالية الوثب الثلاثي علاقة ارتباطية موجبة الكلمات المرشدة: أسلوب ،(الاستقلال – الاعتماد)، المجال الادراكي ،تحصيل، فعالية الوثب الثلاثي.
Relationship Between Muscle Swelling and Hypertrophy Induced by Resistance Training
Authors: Hirono Tetsuya , Ikezoe Tome , Taniguchi Masashi , Tanaka Hiroki , Saeki Junya , Yagi Masahide , Umehara Jun , Ichihashi Noriaki
Published: January 2020

Hirono, T, Ikezoe, T, Taniguchi, M, Tanaka, H, Saeki, J, Yagi, M, Umehara, J, and Ichihashi, N. Relationship between muscle swelling and hypertrophy induced by resistance training. J Strength Cond Res 36(2): 359–364, 2022—Muscle swelling immediately after resistance exercise may be induced by metabolic stress. The accumulation of metabolic stress is considered to promote muscle hypertrophy after several weeks of resistance training (RT). The purpose of this study was to determine the relationship between muscle swelling immediately after the first session of RT and muscle hypertrophy after a 6-week RT using ultrasonography. Twenty-two untrained young men performed knee extension resistance exercise consisting of 3 sets with 8 repetitions at a load of 80% of one repetition maximum for 6 weeks (3 d·wk−1). Muscle thickness of the quadriceps femoris was measured using ultrasonography device at 3 anatomical sites (proximal, medial, and distal sites) of the middle, lateral, and medial part of the anterior thigh. The sum of the muscle thickness at 9 measurement sites was used for analysis. Acute change in muscle thickness immediately after the first session of RT was used as an indicator of muscle swelling. Chronic change in muscle thickness after the 6-week RT was used as an indicator of muscle hypertrophy. A significant increase in muscle thickness was observed immediately after the first session of RT (8.3 ± 3.2%, p < 0.001). After the 6-week RT, muscle thickness increased significantly (2.9 ± 2.6%, p < 0.001). A significant positive correlation was found between muscle swelling and muscle hypertrophy (ρ = 0.443, p = 0.039). This study suggests that the greater the muscle swelling immediately after the first session of RT, the greater the muscle hypertrophy after RT.
Self-Reported Prevalence, Magnitude, and Methods of Rapid Weight Loss in Male and Female Competitive Powerlifters
Authors: Nolan David , Lynch Arthur E. , Egan Brendan
Published: January 2020

Nolan, D, Lynch, AE, and Egan, B. Self-reported prevalence, magnitude, and methods of rapid weight loss in male and female competitive powerlifters. J Strength Cond Res 36(2): 405–410, 2022—Rapid weight loss (RWL) is common practice in weight category sports, but no empirical data exist documenting the weight-making practices of competitive strength athletes. This study investigated the self-reported prevalence, magnitude, and methods of RWL used by male and female powerlifters when preparing for competition. Competitive powerlifters (n = 321; M/F, 194/127) completed an anonymous online questionnaire previously validated for assessment of methods of RWL. Respondents were categorized by their federation's respective antidoping policy, weigh-in procedure, and degree of assistive equipment allowed, in addition to their use or not of RWL. Subgroup analyses were performed on the largest category of respondents (n = 200, M/F, 117/83; ≤2-hour weigh-in, drug-tested, “raw”) based on sex, weight category, and competitive status. Prevalence of RWL was 85.8%, with an average RWL of 3.0 ± 1.9% body mass and an RWL score of 25.1 ± 7.4. Neither sex nor weight category influenced the RWL score, but in male athletes, a lower RWL score (22.7 ± 6.3) was reported in athletes in the lowest tertile of the Wilks score (p = 0.015). Frequencies of “always use” were reported as 54.0% for fluid restriction and 49.0% for water loading. Coaches (37.5%) and online resources (35.0%) were “very influential” on RWL practices in these athletes, while doctors (85.5%) and dieticians (63.0%) were reported to be “not influential.” The prevalence of RWL is high in competitive powerlifting, and the methods used are akin to other weight category sports, but the reported RWL scores are lower than reported in combat sports with longer recovery periods after weigh-in.
Er-Cr-Ge Ternary System
Authors: Konyk M. , Romaka L. , Stadnyk Yu. , Romaka V.V. , Serkiz R. , Horyn A.
Published: January 2020

The isothermal section of the phase diagram of the Er–Cr–Ge ternary system was constructed at 1070 K over the whole concentration range using X-ray diffractometry, metallography and electron microprobe (EPM) analysis. The interaction between the elements in the Er−Cr−Ge system results in the formation of two ternary compounds: ErCr6Ge6 (MgFe6Ge6-type, space group P6/mmm, Pearson symbol hP13; a = 5.15149(3), c = 8.26250(7) Ǻ; RBragg = 0.0493, RF = 0.0574) and ErCr1-хGe2 (CeNiSi2-type, space group Cmcm, Pearson symbol oS16, a = 4.10271(5), b = 15.66525(17), c = 3.99017(4) Ǻ; RBragg = 0.0473, RF = 0.0433) at investigated temperature. For the ErCr1-xGe2 compound, the homogeneity region was determined (ErCr0.28-0.38Ge2; a = 4.10271(5)-4.1418(9), b = 15.6652(1)-15.7581(4), c = 3.99017(4)-3.9291(1) Ǻ).
Investigation of Electronic Conductivity in PbI2:Hf Single Crystals
Authors: Furs T.V. , Hulaj O.I. , Shemet V.Ya.
Published: January 2020

A study of the electron-hole conductivity in PbI2 single crystals doped with Hf (0.2 wt %) was conducted using the Wagner polarization cell method. The influence of the Hf alloying admixture (0.2 mass%) on the nature and parameters of lead diiodide’s electronic conductivity has been analyzed.

Basing on the received current-potential dependences, p-type conductivity of a single crystal PbI2:Hf was established. The hole conductivity values (sро) were determined in the studied temperature range allowing to construct temperature dependence. The sро value for single crystal PbI2:Hf increased responsively to increasing temperature. For PbI2 and PbI2:Hf, a comparative analysis of the electron-hole conductivity was carried out. This investigation allowed determining the activation energy sро reduction from 0.47 eV to 0.32 eV due to hafnium doping. Consequently, the presence of Hf admixture in PbI2 crystals causes new impurity acceptor levels located at a distance of 0.64 eV from the upper limit of the valence zone.
IR Photoinduced Piezoelectric Effects in Multi-Component Chalcogenides Ag2In(Ga)2Si(Ge)S(Se)6
Authors: Myronchuk G.L. , Zamurujeva O.V. , Kityk I.V.
Published: January 2020

The influence of external irradiation of CO2, CO, Er:glass, Nd:YA lasers on the piezoelectric properties of the Ag2In(Ga)2Si(Ge)S(Se)6 crystals was investigated. The maximum photoinduced changes in the piezoelectric coefficient were observed after irradiation with CO2 laser. CO photoinducing bicolour beams with 5.5 μm wavelength cause at least 4 times smaller increase in piezoelectric coefficients. Therefore, it can be expected that the primary mechanisms cause the excitation of the phonon subsystem.
The Influence of Complex Doping on Kinetics of Decomposition and Thermal Stability of Mg-Based Mechanical Alloys
Authors: Ershova O.G. , Dobrovolsky V.D. , Solonin Yu.M.
Published: January 2020

Mechanical alloys (MАs) were synthesized by the method of reactive mechanical alloying. At a hydrogen pressure of 0.1 MPa, with the use of thermal desorption spectroscopy, the thermal stability, the kinetics of hydrogen desorption from the hydride phase MgH2 of the obtained MAs were studied. It has been established that the complex doping by of Fe, Si, Ti, leads to a significant improvement in the of hydrogen desorption from the hydride phase MgH2 of MA synthesized by the RMA. Hydrogen capacity CH of MА after reactive grinding for 20 h. was found to be equal to 5.7 % wt. Due to this alloying, the decrease in the thermodynamic stability of MgH2 is not established. The tested materials showed a high potential as hydrogen storage alloys especially for stationary application.
Biopolimeric Nano Structural Compositions Based on Caramelized Honey
Authors: Кurta S.А. , Khatsevich О.М. , Tsap М.R. , Ondrušová D. , Gromovy T.M. , Boyko N.V.
Published: January 2020

The article deals with chemical properties of honey as well as wax and beeglue before and after the process of caramelization. The research has been done to study chemical reactions of caramelization of honey and other bee products; the biochemical properties of the obtained substances have been investigated as well. It has been revealed that biological activity of the compound after thermochemical heating of honey in the presence of special catalysts was discovered. Infrared spectra, moisture, viscosity, size and distribution of nanoparticles, elemental composition, oxymethylfurfural content, diastase number  of caramelized honey have been investigated. The difference between the sizes of nanoparticles of raw and caramelized honey has been revealed, namely caramelized honey (1.5-2.0 times) of smaller size encourages their biochemical activity. On the basis of the results obtained from caramelized honey, wax and beeglue as well as their properties, the chewing gum with biologically active components for the prevention and treatment of periodontal tissue diseases (gingivitis, periodontitis and periodontal disease) was invented. Clinical studies on chewing gum with honey, wax, and beeglue have confirmed that it provides health benefits among 72 % of patients.
The Nothingness of the Anguish in Søren Kierkegaard’s work as Modernity’s Infernal Redemption
Authors: Ormeny Francisc-Norbert
Published: January 2020

The intention of this short study is to discuss the reverberations of Søren Kierkegaard’s  philosophical considerations on anguish and on void in the context of the latest postmodern theoretical trends (Ben Woodard’s dark vitalism), by presenting the mechanisms by means of which the anguish gets to produce an  “existential switch” which extracts the individual from the register of disintegration and introduces him into the register of the project (Heideggerianly speaking). I will try to demonstrate the compatibility between the structures of the late modernity and the Kierkegaardian vision on tension and on paradox, and will I will attempt to connect the possible findings to the relevant and congenial phenomenological, existentialist and aesthetic theories or set of theories circulating in today’s exegetical canon.
Facial features and social attractiveness: preferences of Bosnian female students
Authors: Bosankić Nina , Besevic Viktorija , Draganović Selvira , Mesic Enisa , Sokolovic Suajb
Published: January 2020

This research aimed at testing multiple fitness hypothesis of attraction, investigating relationship between male facial characteristic and female students' reported readiness to engage in various social relations. A total of 27 male photos were evaluated on five dimensions on a seven-point Likert-type scale ranging from -3 to 3, by convenient sample of 90 female students of University of Sarajevo. The dimensions were: desirable to date – not desirable to date; desirable to marry – not desirable to marry; desirable to have sex with – not desirable to have sex with; desirable to be a friend – not desirable to be a friend; attractive - not attractive. Facial metric measurements of facial features such as distance between the eyes, smile width and height were performed using AutoCad. The results indicate that only smile width positively correlates with desirability of establishing friendship, whilst none of the other characteristics correlates with any of the other dimensions. This leads to the conclusion that motivation to establish various social relations cannot be reduced to mere physical appearance, mainly facial features, but many other variables yet to be investigated.