bluuebunny/crossref_metadata_2025_split huggingface dataset:
Screening for Depression and Suicidality in Adolescents: The Korean Annual Nationwide Survey
Authors: Hwang Jun-Won , Kim Jae-Won , Chung Un-Sun , Hong Hyun Ju , Kim Bongseog 
Published: February 2024

Depression is a major health problem among Korean youth. In Korean adolescents, depression often results in problems related to suicidal ideation and suicide attempts. The suicide rate is 4.7 per 100,000 in Korean youth ages 10 to 19 years and suicide is the leading cause of death in Korean adolescents ages 13 to 18 years.1 Notably, the suicide rate in Korea seems to be one of the highest among Organization for Economic Cooperation and Development (OECD) countries. Academic achievement is considered a key to overall success and is viewed as a survival response in highly competitive societies such as Korea.2 Therefore, considerable research attention has been paid towards the link between depression and Korean adolescents’ subjection to academic pressure and stress by both themselves and their parents.3 An adolescent’s depression tends to increase as a they advance in grade level, and one fifth of Korean adolescents has thought about committing suicide, mainly due to academic stress.3 This article aims to describe the systematic implementation of a depression screening and treatment program within secondary schools in Korea.
Relationship between the Personal Characteristics of Teachers and their Extent of Utilization of Different ICT Tools
Authors: Kumar Vikas , Khan I. M. , Sisodia S. S. , Sharma R. N. , Mishra Geetesh 
Published: February 2024

ICT has the ability to prepare learners for a rapidly changing world scenario. They may use ICT as a tool to identify, analyze, exchange and present information as per their need. The study was conducted in three purposively selected agricultural universities in Rajasthan. Three constituent colleges from each agriculture university were selected purposely on the basis of having maximum number of teachers and 60 per cent of teachers were selected from every college by using simple random sampling technique. The teachers of SKNAU, Jobner and their personal characteristics there were negative and significant relationship with age and annual income, negative and non-significant relationship with education, teaching experience and training, positive and significant relationship with time devoted to ICT in a day and achievement motivation and positive and non-significant relationship with accessibility to ICT tools, innovativeness and job commitment. In SKRAU Bikaner there were negative and significant relationship with age, annual income and teaching experience, negative and non-significant relationship with achievement motivation, positive and significant relationship with time devoted to ICT in a day and accessibility to ICT tools and positive and non-significant relationship with education, training, innovativeness and job commitment. Whereas, in MPUAT, Udaipur there were negative and significant relationship with age, teaching experience and annual income, negative and non-significant relationship with education, innovativeness and achievement motivation, positive and significant relationship with training, time devoted to ICT in a day and accessibility to ICT tools and positive and non-significant relationship with job commitment.
Comparative Study of the Agronomic Performance of Two Sesame Varieties (Sesamum indicum L.): The Case of Local Variety of Central African Origin and Pakréssaya Variety of Burkinabe Origin
Authors: Mbalissa Héraclite Bachelard Koyanga , Aba- Toumnou Lucie , Kamba-Mebourou Emmanuel , Changement Etienne , Mbenda Steve Dieudonné , Silla Semball A.  
Published: February 2024

Sesame (Sesamum indicum L) is a crop with high economic potential in Central African agriculture. This speculation is the subject of a booming international trade for its seeds, oil and meal. The objective of this study is to characterize the agro morphological variability of the two sesame accessions. The trial was conducted at the Bakéré Agricultural Research Station in Bossembele. The plant material used was composed of two sesame accessions from various sources (Central African Republic and Burkina Faso). The choice of land is marked by the delimitation of the plot, the staking and the surveying. The preparation of the soil was carried out in several stages. It is a plot of land of 0.75 hectares divided into three blocks of 0.25 hectares. Sowing took place on August 20, 2022. Before sowing, the sesame is mixed with the sand to respect the rate per hectare because the seeds are too fine. The different parameters measured are: stem length, number of branches per plant, number of pods per plant. The different parameters were assessed using the two-criteria analysis of variance (ANOVA) with the R software version 3.1.3. The results obtained showed that the Pakressaya variety is the earliest and gave the first flower at 31-32 days after sowing and reached 50% flowering at 33-34 days after sowing, thus reflecting the earliness in this variety. The variety (of Central African origin) is the latest and gave the first flower at 52-53 days after sowing and reached 50% flowering at 56-57 days after sowing with many more fruiting branches. The pakressaya variety proved to be productive and was selected for the rest of our project. In perspective, it is envisaged to determine the genetic diversity of the Pakréssaya accession using microsatellite markers.
Morphology of epoxy resin modified with silyl‐crosslinked urethane elastomer
Authors: Liu Pinggui , He Lihua , Ding Heyan , Liu Junneng , Yi Xiaosu 
Published: April 2005

AbstractSilyl‐crosslinked urethane elastomer modifying epoxy resin has drawn much interest. Here the triethoxysilyl‐terminated polycaprolactone elastomer (PCL‐TESi) modifying diglycidylether of bisphenol A epoxy resins (DGEBA) system was chosen, and then the effect of the type of curing agent on the phase structure of the studied epoxy resin system was investigated. The modified systems were obtained with different phase structures by varying the formulations of the curing agent. It was experimentally shown that with the addition of aminosilane (KBE‐9103), the crosslinked density was greatly increased. The cured system also showed from SEM and TEM analysis that addition of KBE‐9103 increased the compatibility between the PCL‐TESi and DGEBA, which made the ductility of the system decrease, but also indicated from TEM that addition of much KBE‐9103 made the reacted silicone particles coagulate each other. The state of phase separation from TEM in the cured system was theoretically explained. These would serve the deeper studies of the mechanism of silyl‐crosslinked urethane elastomer modifying epoxy resin in the future. © 2005 Wiley Periodicals, Inc. J Appl Polym Sci 97: 611–619, 2005
Molar mass distributions of polymers from size exclusion chromatography and matrix‐assisted laser desorption/ionization time‐of‐flight mass spectrometry: Methods for comparison
Authors: Mourey Thomas H. , Hoteling Andrew J. , Balke Stephen T. , Owens Kevin G. 
Published: April 2005

AbstractEquations are presented for calculating molar mass averages and molar mass distributions from matrix‐assisted laser desorption/ionization time‐of‐flight mass spectrometry (MALDI‐TOF MS) data and from size exclusion chromatography (SEC) data. The utility of polydispersity is examined as an indicator of the expectation of MALDI‐TOF MS mass discrimination effects. Cumulative distributions are found to be rich in information for comparing the two techniques and are easily obtained from both SEC and MALDI‐TOF MS data. Analyses of a series of narrow molar mass distribution poly(methyl methacrylate) (PMMA) standards and one polydisperse sample have been performed with both methods. MALDI‐TOF MS did not detect dimer and trimer in the PMMA samples, and it often indicated lower amounts of high‐molar‐mass polymers than did SEC. The results showed that the distribution breadth, as evidenced by the standard deviation of the distribution (calculated from the polydispersity and number‐average molar mass), correlated well with the molar mass range observed in the MALDI‐TOF MS spectra, whereas the polydispersity alone did not. Ratioing the extremes in the molar mass concentrations measured with the SEC differential refractometer, which were necessary to adequately define molar mass distributions, showed that detector dynamic range values as high as approximately 370,000 were required for the polydisperse samples. © 2005 Wiley Periodicals, Inc. J Appl Polym Sci 97: 627–639, 2005
Enzyme‐catalyzed copolymerization of oxiranes with dicarboxylic acid anhydrides
Authors: Rajkhowa Ritimoni , Varma I. K. , Albertsson Ann‐Christine , Edlund Ulrica 
Published: April 2005

AbstractRing‐opening copolymerizations of the oxiranes glycidyl phenyl ether (GPE) and diglycidyl ether of bisphenol A (DGEBA) with a dicarboxylic acid anhydride [methyl hexahydrophthalic anhydride, nadic anhydride, maleic anhydride (MA), or itaconic anhydride (IA)] were carried out with the lipases Candida cylindracea (CCL), Lipozyme TL‐IM (LIM), and Novozyme 435 (N435) as catalysts. The CCL‐catalyzed reaction of DGEBA with MA or IA (at a 1:2 molar ratio) at 80°C resulted in only partial curing. We monitored the reactions by Fourier transform infrared spectroscopy and by following the changes in the intensities of carbonyl stretching frequencies of the anhydride and ester groups. The reactivity of the oxirane group in GPE was higher than that in DGEBA; this may have been due to the higher viscosity of DGEBA. The reactivities of the enzymes for the copolymerization of the oxiranes and dicarboxylic acid anhydride were in the order LIM > CCL > N435. © 2005 Wiley Periodicals, Inc. J Appl Polym Sci 97: 697–704, 2005
Chiroptical properties of cation complexes of chiral phenazino‐18‐crown‐6 ether‐type hosts
Authors: Szarvas Szilvia , Szalay Luca , Vass Elemér , Hollósi Miklós , Samu Erika , Huszthy Péter 
Published: April 2005

AbstractHerein we report CD spectroscopic studies on complexes of (R,R)‐dimethyl‐, (R,R)‐diisobutyl‐, and (S,S)‐di‐sec‐butyl‐phenazino‐18‐crown‐6 ligands (Scheme 1) with selected alkali (Na+, K+), alkaline earth (Mg2+, Ca2+), and transition‐metal (Ag+, Zn2+, Ni2+, Cd2+, Pb2+) cations. The complexation was monitored in the 300‐ to 240‐nm region of the CD spectra comprising mainly the 1Bb band of the heteroaromatic subunit. The CD spectra of the complexes showed an unexpected diversity. In the most characteristic 1Bb spectral region, the number, position, and intensity of band(s) depend not only on the heteroaromatic subunit and the size of the substituents but also on the diameter, ion strength, and coordination geometry of the cation. The appearance of two weak 1Bb CD bands (type‐I spectra) with the sign pattern of the host is an indication of two complexes of comparable stability. The “type‐II” spectra differ from that of the host in the number, sign pattern, and intensity of the bands. Complexes of transition‐metal cations generally show CD spectra with more intense bands. The CD spectra of complexes of (S,S)‐di‐sec‐butyl‐phenazino‐18‐crown‐6 ligand with Na+, K+, and Pb2+ (type III) strongly suggest exciton coupling caused by the closeness of the heteroaromatic rings of two 1:1 complex molecules. Chirality 17:345–351, 2005. © 2005 Wiley‐Liss, Inc.
Psychological distress in spouses of men treated for early‐stage prostate carcinoma
Authors: Eton David T. , Lepore Stephen J. , Helgeson Vicki S. 
Published: April 2005

AbstractBACKGROUNDThe authors examined levels and predictors of psychological distress in the wives of men treated for early‐stage prostate carcinoma (PCa).METHODSPatients with PCa (N = 165) and spouses were interviewed to assess general and cancer‐specific distress. Social and intrapersonal factors of spouses as well as clinical characteristics and quality of life of patients were assessed as potential predictors of spouses' distress.RESULTSSpouses reported more cancer‐specific distress than did patients (P < 0.001), but did not differ from patients in general distress. Several spouse‐reported factors predicted higher spouses' distress, including less education (P < 0.005), worse marriage quality and less social support (Ps < 0.005), more negative social interaction with the patient (Ps < 0.001), lower self‐esteem (Ps < 0.001), less positive coping (Ps < 0.005), searching for meaning (P < 0.001), not finding meaning (P < 0.005), and greater illness uncertainty (Ps < 0.001). Patients' bowel function and mental health also predicted greater spouses' distress (Ps < 0.005).CONCLUSIONSThe findings indicated that overall distress in spouses of early‐stage patients with PCa was modest, and it was more likely to be predicted by psychosocial than medical factors. Cancer 2005. © 2005 American Cancer Society.
Comparative proteomic analysis identifies protein disulfide isomerase and peroxiredoxin 1 as new players involved in embryonic interdigital cell death
Authors: Shan S.W. , Tang M.K. , Cai D.Q. , Chui Y.L. , Chow P.H. , Grotewold L. , Lee K.K.H. 
Published: April 2005

AbstractIn this study, we used comparative proteomics to identify proteins that were involved in the regulation of interdigital cell death. The protein profiles of embryonic day (E) 12.5 and 13.5 mouse hindlimb interdigital tissues were compared to identify proteins that were differentially expressed. The interdigital cells are irreversibly committed to programmed cell death (PCD) at E13.5, whereas they are developmentally plastic at E12.5. We established that protein disulfide isomerase (PDI) expression was up‐regulated at E13.5, while peroxiredoxin 1 (Prdx1) expression was down‐regulated at this time point. Semiquantitative reverse transcriptase‐polymerase chain reaction and Western blot analyses confirmed the data obtained from the two‐dimensional electrophoresis gels. Furthermore, we were able to up‐regulate PDI expression by manipulating the E12.5 interdigital tissues to die during culture, although this up‐regulation was not possible when cell survival was promoted. In addition, we could inhibit interdigital cell death and expression of proapoptotic genes (Bmp‐4 and Bambi) by treating interdigital tissues with PDI antibodies and bacitracin (a PDI enzyme inhibitor). These findings suggested that PDI was involved in the activation and maintenance of interdigital cell death. Conversely, we determined that Prdx1 expression was maintained when interdigital cultures were manipulated to survive but down‐regulated when the cultures were permitted to die. The result suggested that Prdx1 was involved in maintaining interdigital cell survival. However, we were unable to induce interdigital cell death by means of RNA interference‐mediated silencing of Prdx1 expression, indicating that Prdx1 down‐regulation is not sufficient for PCD to occur. Proteomic analysis of the Prdx1 knock‐down cells revealed that the level of NF‐kappaB inhibitor epsilon (IκBε) was dramatically reduced. Furthermore, we found an increase in NFκB activation and reactive oxygen species (ROS) levels in the cytoplasm as a result of Prdx1 knockdown. We also found that silencing Prdx1 made the interdigital cells more susceptible to ROS‐induced cell death. Taken together, our study identifies two new players in interdigital cell death and highlights that PCD is regulated by a delicate balance of proapoptotic and survival‐promoting activities. Developmental Dynamics 233:266–281, 2005. © 2005 Wiley‐Liss, Inc.
Ionic Liquids with Fluorine‐Containing Cations
Authors: Xue Hong , Shreeve Jean’ne M. 
Published: April 2005

AbstractInterest in ionic liquids with fluorine‐containing cations has grown markedly in recent years. The syntheses, characterization and properties of quaternary fluoroalkyl‐substituted ammonium, imidazolium, triazolium, pyridinium, pyrazinium, pyridazinium, pyrimidinium, piperazinium, pyrrolidinium, oxazolidinium, and morpholinium salts have been studied in detail. By modifying the anion or the fluorine‐containing substituent on the cation, a wide range of properties of fluorine‐containing ionic liquids can be tuned, including viscosity, melting point, density, conductivity, solubility, liquid range, thermal and hydrolytic stability. They are promising solvents for electrochemical, photovoltaic, surfactant and synthetic applications. In this Microreview, only the literature dealing with ionic liquids that involve fluorine‐containing cations is presented. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2005)
fMRI‐constrained MEG source imaging and consideration of fMRI invisible sources
Authors: Im Chang‐Hwan , Jung Hyun‐Kyo , Fujimaki Norio 
Published: April 2005

AbstractRecent studies on multimodal brain source imaging have shown that the use of functional MRI (fMRI) prior information could enhance spatial resolution of magnetoencephalography (MEG), while MEG could compensate poor temporal resolution of fMRI. This article deals with a multimodal imaging method, which combines fMRI and MEG for enhancing both spatial and temporal resolutions. Recent studies on the combination of fMRI and MEG have suggested that the fMRI prior information could be very easily implemented by just giving different weighting factors to the diagonal terms of source covariance matrix in linear inverse operator. We applied the fMRI constrained imaging method to several simulation data and experimental data (Japanese language lexical judgment experiment), and found that some MEG sources may be eliminated by the introduction of the fMRI weighting and the eliminated sources may affect source estimation in fMRI activation regions. In this article, in order to check whether the eliminated sources were fMRI invisible ones or just spurious ones, we placed small numbers of regional sources (rotating dipoles) around all possible activation regions and investigated their temporal changes. By investigating the results carefully, we could evaluate whether the missed sources were real or not. Hum Brain Mapp, 2005. © 2005 Wiley‐Liss, Inc.
Germline mutations and polymorphisms in the NFKBIA gene in Hodgkin lymphoma
Authors: Osborne Julie , Lake Annette , Alexander Freda E. , Taylor G. Malcolm , Jarrett Ruth F. 
Published: April 2005

AbstractSomatic inactivation of NFKBIA, the gene encoding IκBα, is a frequent occurrence in the malignant Hodgkin and Reed‐Sternberg (HRS) cells of Hodgkin lymphoma (HL). Impairment of IκBα function results in deregulated NF‐κB activity, a characteristic of HRS cells. The molecular basis for familial HL, which accounts for approximately 4% of all HL cases, is unclear. To date, familial HL cases have not been evaluated for germline NFKBIA mutations. We screened the entire NFKBIA gene in 8 individuals with familial HL but found no mutations in the coding region or promoter sequences. We identified the first germline NFKBIA missense mutation in a patient with presumed sporadic HL. The frequency of 4 polymorphisms within the NFKBIA gene and promoter region was investigated in a series of HL and control samples; no significant differences emerged but a novel polymorphism was identified in the promoter region. Overall, our results suggest that germline mutations of NFKBIA are not a significant cause of familial aggregation of HL but may contribute to inherited susceptibility to HL. © 2005 Wiley‐Liss, Inc.
Association between botulinum toxin injection into the arm and changes in gait in adults after stroke
Authors: Hirsch Mark A. , Westhoff Bettina , Toole Tonya , Haupenthal Stephan , Krauspe Rüdiger , Hefter Harald 
Published: April 2005

AbstractBotulinum toxin (BTX) is often used to improve arm function in persons with hemiparesis after stroke. Persons injected into the arm sometimes report changes in their gait. The purpose of this open‐labeled pilot study was to investigate the association between injecting BTX into the upper limb and ankle and knee range of motion (ROM) and paretic‐leg stride‐time, defined as the time in seconds required to move the hemiparetic leg from initial contact of the foot to initial contact of the same foot. Gait parameters were recorded before and 4 to 6 weeks after the hemiparetic arm was injected with BTX in 13 adults with hemiparesis secondary to stroke, using a three‐dimensional computerized motion analysis system. BTX injection into the paretic arm was associated with a decrease in stride‐time of the paretic leg in all participants. Slower striding participants improved knee and ankle ROM in the paretic leg. There was no change in ankle and knee ROM in faster striding participants. Injection of BTX into the upper extremity is associated with a change in hemiparetic leg stride‐time and ankle and knee ROM. There is a variability of response, with slow striders improving to a greater extent than fast striders. © 2005 Movement Disorder Society
Androgen and estrogen treatments alter steady state messengers RNA (mRNA) levels of testicular steroidogenic enzymes in the rainbow trout, Oncorhynchus mykiss
Authors: Baron D. , Fostier A. , Breton B. , Guiguen Y. 
Published: April 2005

AbstractRecent investigations have shown that estrogens have profound inhibitory effects on steroidogenic enzyme gene expressions before and after testicular differentiation in the rainbow trout, Oncorhynchus mykiss. This present study bring new data on juvenile rainbow trout treated with estrogens and androgens. Following a 8 days oral treatment of juvenile male with 17α‐ethynyl‐estradiol (EE2, 20 mg/kg diet) or 11β‐hydroxyandrostenedione (11βOHΔ4, 10 mg/kg diet), we observed a fast and marked decrease of steady‐state mRNA levels for 3βHSD, P450scc, P450c17, and P450c11 enzymes in the testis. After completion of these treatments, mRNA levels of these enzymes remained low in EE2 treated males whereas in 11βOHΔ4 treated males they recovered their initial levels in 8 days. This demonstrate that both androgen and estrogen treatments have profound effects on testicular steroidogenesis by decreasing steroid enzymes steady‐state mRNA. After in vitro incubation of testicular explants with 17β‐estradiol (E2, 600 ng/ml of medium), we also observed a decrease of mRNA levels for 3βHSD and P450c11. This suggest that estrogens effects could be triggered, at least to some extend, directly on the testis. We also investigated the hypothesis of a negative feedback of steroids on follicle stimulating hormone (FSH) secretion, but FSH plasmatic levels in treated fish did not showed any significant decrease. This demonstrate that FSH is not implied in this steroids inhibition of steroidogenic enzymes gene expression. Mol. Reprod. Dev. © 2005 Wiley‐Liss, Inc.
Fully grown mouse oocyte contains transcription inhibiting activity which acts through histone deacetylation
Authors: Borsuk Ewa , Milik Elwira 
Published: April 2005

AbstractMouse ovarian oocytes remain transcriptionally active during the entire period of oocyte growth. In the fully grown antral oocytes, RNA synthesis is terminated before initiation of maturation. The mechanism involved in this process remains unknown. It was proposed that some signals provided by companion granulosa cells, and accumulating in the cytoplasm of the oocyte, play a role in the termination of RNA synthesis. It seems possible that under influence of these signals, the oocyte cytoplasm becomes transcriptionally nonpermissive. In the present study, transcriptionally active, single blastomeres of the 8‐cell mouse embryo were fused with nontranscribing fully grown oocytes, and RNA synthesis was analyzed in the resulting hybrids. We show that after 27 hr of culture of hybrid cells, transcription in the blastomere nuclei was finally silenced. This process occurs without nuclear envelope breakdown and is accompanied by progressive condensation of the chromatin in the blastomere nuclei. We show also the involvement of core histone deacetylation in the modification of chromatin configuration and termination of RNA synthesis in the blastomere nuclei. Mol. Reprod. Dev. © 2005 Wiley‐Liss, Inc.