bluuebunny/crossref_metadata_2025 huggingface dataset:
Achilles tendon surgery in clubfoot: Are long term sequelae predictable?
Authors: Pedrotti Luisella , Bertani Barbara , Tuvo Gabriella , Mora Redento , Marin Luca , De Rosa Federica
Published: May 2022

Congenital Clubfoot (CCF) treatment involves a surgical procedure on the Achilles tendon most of the time, i.e. tenotomy or, in selected cases, Z-plasty lengthening. Many authors have studied the outcomes of Achilles tenotomy, describing complete clinical and ultrasound tendon fibers integrity restoration 3-6 weeks after surgery. Nevertheless, little is known about the mechanical properties of the operated tendon. Recently, cases of subcutaneous rupture of the Achilles tendon have been described in adolescents who practiced sports and who had undergone Achilles tenotomy for congenital clubfoot in childhood. Authors report two cases of atraumatic Achilles tendon injury (subcutaneous rupture and intratendinous ossification) in adult patients who had been treated for congenital clubfoot in childhood. In both cases, no causes determining the injury were identified; in the medical history there was a Z-plasty lengthening of the Achilles tendon, performed within the first year of life, which could be considered a predisposing factor. The usefulness of long-term monitoring of patients treated for CCF with surgical procedures on the Achilles tendon is therefore hypothesized, in order to promptly identify by symptoms, clinical pictures and ultrasound criteria, tendon suffering that may predispose subcutaneous rupture.
COVID-19 as potential aggravating factor for the natural course of new onset-dermatomyositis
Authors: Faria M.S.M.S. , Shinjo S.K.
Published: May 2022

Borges et al. have recently reported the first case of a dermatomyositis onset in close association with established coronavirus disease 2019 (COVID-19). Similarly, we report a patient who, on the contrary, had COVID-19 following early established dermatomyositis. We report prospectively the outcome of her disease.
Erythema nodosum after COVID-19 vaccine
Authors: Maranini B. , Ciancio G. , Corazza M. , Ruffilli F. , Galoppini G. , Govoni M.
Published: May 2022

The current coronavirus disease 2019 (COVID-19) pandemic is a global challenge with strong medical and socioeconomic implications. Hopes have been placed in the development of various vaccines. As the vaccination campaign is in progress, adverse effects need to be monitored closely. Possible side effects range from minor events to more serious manifestations. In this article, we describe two cases of erythema nodosum (EN) after COVID-19 vaccination in two previously healthy female patients of 59 and 51 years, respectively. Most of the usual etiologies of EN were excluded by laboratory testing. EN was successfully treated with corticosteroids. Remarkably, in the first case, a relapse occurred 48 hours after the second dose of the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) vaccine. In this case series, we describe two unusual occurrences of EN after vaccination with an mRNA COVID-19 vaccine and a viral vector vaccine, respectively, and we discuss the available related literature.
The prevalence and clinical spectrum of post-Covid syndrome in patients with rheumatic diseases: a single-center experience
Authors: Batıbay S. , Koçak Ulucaköy R. , Günendi Z. , Göğüş F.
Published: May 2022

Post-coronavirus disease (COVID) syndrome (PCS) is a term used to describe the clinical condition of patients who have recovered from COVID-19 but are still experiencing prolonged effects of infection or persistent symptoms for longer than expected. Although PCS has been previously studied in the general population, it has not been investigated in a specific population of patients with inflammatory rheumatic disease (IRD). This study aims to evaluate the presence and frequency of PCS among our rheumatology outpatients. This is a cross-sectional study of patients with IRD whose symptoms persisted for 12 weeks after the detection of COVID-19 infection. The patients were assessed with a survey form during their routine clinic follow-up or by contacting them by phone. Patients’ demographics, diagnosis, medication, comorbidities, outcome of COVID-19, and symptoms related to PCS were collected. Fifty-three patients with IRD and COVID (mean age: 48.5 13.99 years, 71.7% women) were included. PCS was observed in 36 (67.9%) patients. Twenty-two (41.5%) of them had three or more symptoms; 14 (26.4%) had one or two symptoms. Although more than 30 symptoms were detected, the most frequent were fatigue and weakness. No significant relationship was detected between the development of PCS and gender, age, disease duration, presence of COVID-related complications, and the need for oxygen support, except for smoking which showed a protective effect (p=0.008). PCS was detected in more than half of the patients. There was no independent risk factor for the development of PCS, except smoking.
Development of a mobile application focusing on developmental support care for Korean infants born prematurely: a methodological study
Authors: Park Ji Hyeon , Cho Haeryun
Published: May 2022

Purpose: This study aimed to develop and evaluate a mobile application focusing on developmental support care for infants born prematurely.Methods: An application was developed using the analysis, design, development, implementation, and evaluation model. In the analysis phase, previous research was evaluated through big data text-mining and a literature review. In the design phase, the preliminary content of the application was designed, and the content validity and comprehension were verified. A hybrid application was developed and used by eight experts and ten users, who evaluated the layout of the mobile application and their satisfaction with it.Results: The content of the designed application comprised a diary, customized information, developmental play, and community. The mean scores for layout were 3.73±0.47 and 3.43±0.68 out of 4 points among the experts and users, respectively. Users’ mean satisfaction score was 3.70±0.70 out of 5 points.Conclusion: The information provided by the mobile application was evaluated as consistent and systematic. The application was also found to be satisfactory by infants’ parents. The mobile application developed through this study is expected to be effective in supporting the development of children born prematurely.
Korean college students’ attitudes toward a tobacco-free campus: a cross-sectional descriptive study
Authors: Sohn Min , Im Boae , Suh Minhee , Lee Hun Jae
Published: May 2022

Purpose: A tobacco-free campus (TFC) is the most advanced tobacco-control policy for college campuses, but it has rarely been explored in Korea. This study aimed to explore Korean college students’ attitudes toward TFC and related factors.Methods: This cross-sectional descriptive study enrolled college students who were taking an elective course on smoking cessation and a healthy lifestyle at a university located in Incheon, Korea. Data were collected from March 1 to December 31, 2019 using a structured questionnaire, and study participants were recruited using convenience sampling.Results: Data on 309 college students were analyzed. Of those participants, 6.1% supported the TFC policy. Multiple logistic regression analysis showed that female gender (adjusted odds ratio [aOR]=5.80, 95% confidence interval [CI]=1.47-22.95), taking the course to quit smoking oneself (aOR=11.03, 95% CI=1.04-117.05), anxiety in the past month (aOR=4.27, 95% CI=1.06-17.31), and being a current smoker (aOR=0.06, 95% CI=0.01-0.70) were statistically significant independent predictors of TFC support.Conclusion: Women, students taking the course to quit smoking themselves, nonsmokers, and students who felt anxious in the past month were more likely to support TFC. Further research with more representative samples is required to examine the characteristics of people who favor TFC.
Missed nursing care and its influencing factors among neonatal intensive care unit nurses in South Korea: a descriptive study
Authors: Kim Soohyun , Chae Sun-Mi
Published: May 2022

Purpose: Preventing missed care is important in neonatal intensive care units (NICUs) due to neonates’ vulnerabilities. This study examined missed care and its influencing factors among NICU nurses.Methods: Missed care among 120 Korean NICU nurses was measured using a cross-culturally adapted online questionnaire. The frequency of missed care for 32 nursing activities and the significance of 23 reasons for missed care were collected.Results: All participants had missed at least 1 activity, missing on average 19.35 activities during a typical work-day. The most common missed item was “provide developmental care for the baby”. The most common reason for missed care was “emergency within the unit or deterioration of one of the assigned patients”. The final regression model explained 9.6% of variance in missed care. The average daily number of assigned patients receiving inotropes or sedation over the last month influenced the total number of missed care items.Conclusion: Missed care was affected by nurses’ workload related to the number of patients taking medication. Frequently missed activities, especially those related to developmental care, require patience and time, conflicting with safety prioritization and inadequate working conditions. NICU nurses’ working conditions should be improved to ensure adequate time for nursing activities.
Transfer anxiety in parents of children transferred from pediatric intensive care units to general wards in South Korea: a hybrid concept analysis
Authors: Park Jisu , Choi Eun Kyoung
Published: May 2022

Purpose: This study aimed to analyze the concept of transfer anxiety in parents of children transferred from pediatric intensive care units to general wards.Methods: The hybrid model by Schwarz-Barcott and Kim was used to analyze the characteristics of transfer anxiety in parents of children transferred from pediatric intensive care units to general wards.Results: Transfer anxiety was defined by the following attributes: 1) stress concerning the adaptation process, 2) concern about the child’s condition worsening due to the parent’s caregiving, and 3) involuntary changes in daily life due to the treatment. Transfer anxiety has the following antecedents: 1) uncertainty; 2) a lack of knowledge about the illness, medical devices, and caregiving; and 3) a lack of social support. It resulted in 1) caregiver burden, 2) a decrease in the capacity for coping with caregiving, 3) delays in the child’s physical and psychological recovery, and 4) decreased quality of life.Conclusion: It is necessary to develop an assessment scale that considers the attributes of transfer anxiety in parents of children transferred from pediatric intensive care units to general wards. Furthermore, an effective nursing intervention should be developed to reduce transfer anxiety.
Radiomics based on biparametric MRI for the detection of significant residual prostate cancer after androgen deprivation therapy: using whole-mount histopathology as reference standard
Authors: Chen Zhang-Zhe , Gu Wei-Jie , Zhou Bing-Ni , Liu Wei , Gan Hua-Lei , Zhang Yong , Zhou Liang-Ping , Liu Xiao-Hang
Published: May 2022

We aimed to study radiomics approach based on biparametric magnetic resonance imaging (MRI) for determining significant residual cancer after androgen deprivation therapy (ADT). Ninety-two post-ADT prostate cancer patients underwent MRI before prostatectomy (62 with significant residual disease and 30 with complete response or minimum residual disease [CR/MRD]). Totally, 100 significant residual, 52 CR/MRD lesions, and 70 benign tissues were selected according to pathology. First, 381 radiomics features were extracted from T2-weighted imaging, diffusion-weighted imaging, and apparent diffusion coefficient (ADC) maps. Optimal features were selected using a support vector machine with a recursive feature elimination algorithm (SVM-RFE). Then, ADC values of significant residual, CR/MRD lesions, and benign tissues were compared by one-way analysis of variance. Logistic regression was used to construct models with SVM features to differentiate between each pair of tissues. Third, the efficiencies of ADC value and radiomics models for differentiating the three tissues were assessed by area under receiver operating characteristic curve (AUC). The ADC value (mean ± standard deviation [s.d.]) of significant residual lesions ([1.10 ± 0.02] × 10-3 mm2 s-1) was significantly lower than that of CR/MRD ([1.17 ± 0.02] × 10-3 mm2 s-1), which was significantly lower than that of benign tissues ([1.30 ± 0.02] × 10-3 mm2 s-1; both P < 0.05). The SVM feature models were comparable to ADC value in distinguishing CR/MRD from benign tissue (AUC: 0.766 vs 0.792) and distinguishing residual from benign tissue (AUC: 0.825 vs 0.835) (both P > 0.05), but superior to ADC value in differentiating significant residual from CR/MRD (AUC: 0.748 vs 0.558; P = 0.041). Radiomics approach with biparametric MRI could promote the detection of significant residual prostate cancer after ADT.
Comparative premedication efficacy of gabapentin, melatonin, and dextromethorphan in postoperative pain management following general anesthesia in hip fracture surgery
Authors: Modir Hesameddin , Mahmoodiyeh Behnam , Azami Mehran , Behnamimoghadam Armita , Almasi-Hashiani Amir
Published: May 2022

Background

The effectiveness of postoperative pain relief regimens is well established and postulated to rely on diverse factors.

Objective

The aim of this study was to compare the effect of gabapentin and melatonin and dextromethorphan on postoperative pain control in patients undergoing hip fracture surgery under general anesthesia.

Patients and methods

In a double-blind controlled trial 125 patients requiring hip fracture surgery enrollment into the study after following ethical approval and informed participant consent. The patients were randomized to either each of the three regimens (gabapentin, melatonin, and dextromethorphan) by the block-randomization method. Outcome measurements were of foremost importance, patient’s pain scores throughout the recovery time and scheduled postoperative time intervals (2, 4, 6, 12, 24 h), doses of opioid use (mg) in the initial 24 h, and at length, sedation levels using the Ramsay scoring system at the early postoperative time intervals. Moreover, complications including chills, nausea, vomiting, and decreased consciousness were recorded. Statistical data analysis conducted by analysis of variance, χ
2, and repeated measurements through SPSS, version 20.

Results

Gabapentin-treated patients manifested the lowest blood pressures (P<0.05), with maximum pain relief being experienced, sedation level being greater (P<0.05), and opioid use being lower in the group (P=0.0001).

Conclusion

We have the impression that gabapentin could be connected with improving pain relief and sedation, whereas opioid use was observed comparatively lower in the initial 24 h, and hence inferentially. The premedication can be driven to be superior in creating favorable conditions for analgesia and sedation and effective in preventing complications requiring treatment within 24 h postoperatively versus baseline and promisingly suggested to be continued for postoperative pain management, procedural sedation quality improvement, and opioid use reduction within the initial 24 h.
Comparative studies of free and immobilized partially purified lipase from Aspergillus niger NRRL-599 produced from solid-state fermentation using gelatin-coated titanium nanoparticles and its application in textile industry
Authors: El Menoufy Hassaan A. , Gomaa Sanaa K. , Haroun Ahmed A. , Farag Ali N. , Shafei Mona S. , Shetaia Yousseria M. , Abd El Aal Rania A.
Published: May 2022

Background and objective

Lipases (triacylglycerol acylhydrolase, EC. 3.1.1.3) belong to a class of hydrolases that are specific for the hydrolysis of fats into fatty acids and glycerol that have much application in different industrial processes. Fungi, yeast, and bacteria have been reported to be sources of lipase. There are many immobilized methods for enzyme, and the commonly used methods are physical adsorption, entrapment, and cross-linkage. This study aimed to evaluate lipase production by Aspergillus niger NRRL-599 in solid cultivation using agro-industrial waste as a substrate. Partial purification of the crude enzyme and its characterization and immobilization using nanoparticles were carried out. The potential application of the immobilized and partially purified enzyme was also studied in the field of textile.

Materials and methods

Partially purified A. niger NRRL-599 lipase was immobilized by physical adsorption onto modified titanium dioxide nanoparticles using gelatin and palmitic acid binders and characterized by transmission electron microscopy, dynamic light scattering, and Fourier-transform infrared.

Results and conclusion

In our study, lipase produced by A. niger NRRL-599 was partially purified by ammonium sulfate at 60% saturation and immobilized on gelatin-coated titanium dioxide. Comparison between the properties of the free and the immobilized A. niger NRRL-599 lipase forms was carried out. The optimum pH was 9.0 and 10.0 for the free and immobilized forms, respectively. The half-life of the soluble-free lipase at 50 and 55°C was 17.3 and 23.1 min, respectively, whereas for the immobilized form was 23.1 and 34.6 min, respectively. At 50 and 55°C, the deactivation rate constants (kD) for soluble lipase were 6.6×10−3 and 5×10−3, respectively, and 6.6×10−3 and 3.3×10−3, respectively, for immobilized lipase. The K
m was 11.11 and 12.5 mM for the immobilized and free forms, respectively. The V
max was 416.6 U/mg protein and 296.3 U/mg protein for immobilized and free lipase forms, respectively. This confirms that the apparent affinity toward the substrate increases by immobilization. Partially purified lipase and immobilized enzymes were used in the textiles in the treatment of wool fibers before dying to improve the color strength.
Chemotherapy or chemotherapy followed by consolidation chemoradiation in postoperative (simple cholecystectomy) gall bladder cancer with residual disease, unsuitable for revision surgery? Risk stratification and outcomes
Authors: Alam Md. Nawed , Agrawal S. , Rastogi N. , Saxena Rajan
Published: May 2022

Background:

Revision surgery (RS) is the standard of care for gallbladder cancer (GBC) after simple cholecystectomy (SC). Often these patients are unsuitable for RS due to late referral or unresectable disease. Do such patients benefit with chemotherapy (CT) alone or dual-modality (CT followed by consolidation chemoradiotherapy [CTRT])? In the absence of any guidelines, we reviewed our data with CT or CTRT to inform us regarding adequate therapy.

Materials and Methods:

Patients of GBC post-SC referred to us (January 2008 to December 2016) were risk-stratified into three categories based on a diagnostic CT scan: No residual disease (NRD), limited volume residual disease (LR1: Residual/recurrent disease in GB bed with or without N1 nodal station involvement), advanced residual disease (LR2: Residual/recurrent disease involving GB bed with N2 nodal station involvement) and treated with CT or CT followed by CTRT. Response to therapy (RECIST), overall survival (OS), and adverse prognostic factors affecting OS were evaluated.

Results:

Out of 176 patients, 87were nonmetastatic (NRD = 17, LR1 = 33 and LR 2 = 37). 31 received CT, 49 CTRT and 8 defaulted. At a median follow up of 21 months, the median OS with CT versus consolidation CTRT was not reached in NRD (P = 0.57), 19 months versus 27 months in LR1 (P = 0.003) and 14 months versus 18 months in LR 2 (P = 0.29), respectively. On univariate analysis, residual disease burden, type of treatment (CT vs. CTRT), N stage, and response to treatment were found statistically significant.

Conclusion:

Our data suggest that CT followed by CTRT improves outcomes in patients with limited volume disease.
Computed tomography-based radiomics nomogram model for predicting adherent perinephric fat
Authors: Ma Teng , Cong Lin , Xu Jingxu , Huang Chencui , Ma Qianli , Hua Qianqian , Li Xiaojiao , Huang Zhaoqin , Wang Ximing , Chen Yunchao
Published: May 2022

Aims:

We investigated the predictive value of a computed tomography (CT)-based radiomics nomogram model for adherent perinephric fat (APF).

Materials and Methods:

The data of 220 renal carcinoma patients were collected retrospectively. Patients were divided into training (n= 153) and validation cohorts (n= 67). Radiomics features were extracted from plain CT scans, while radscore was generated by a linear combination of selected radiomics features and their weighting coefficients. Univariate logistic regression was used to screen clinical risk factors. Multivariate logistic regression combined with radscore was used to screen final predictors to construct a radiomics nomogram model. Receiver Operating Characteristic curves were used to evaluate the predictive performance of models.

Results:

Thirteen radiomics features associated with APF achieved a good predictive effect. The overall area under the curve (AUC) of the radscore model was 0.966, and that of the training and validation cohorts was 0.969 and 0.956, respectively. Gender, age, hypertension, size, perinephric fat thickness, Mayo Adhesive Probability score, neutrophil-to-lymphocyte ratio, monocyte-to-lymphocyte ratio, systemic inflammation response index, and systemic immune-inflammation index were risk factors for APF (P < 0.05). The overall AUC of the radiomics nomogram model based on radiomics features and clinical factors, the training, and validation cohorts was 0.981, 0.997, and 0.949, respectively. Both models had high diagnostic efficiency. However, their differential diagnostic accuracy was higher than that of the clinical model. Additionally, the radiomics nomogram model had higher AUC and specificity.

Conclusions:

The radiomics nomogram model is a prediction tool based on radiomics features and clinical risk factors and has high prediction ability and clinical application value for APF.
Hyperbolic Eisenstein Series for Geometrically Finite Hyperbolic Surfaces of Infinite Volume
Authors: Falliero Thérèse
Published: May 2022

Let

M

be a geometrically finite hyperbolic surface of infinite volume. After writing down the spectral decomposition for the Laplacian on 1-forms of

M

, we generalize Kudla and Millson’s construction of hyperbolic Eisenstein series and other related results.
PENGUKURAN TOTAL PRODUCTIVE MAINTENANCE (TPM) MENGGUNAKAN METODE OVERALL EQUIPMENT EFFECTIVENESS (OEE) PADA MESIN REAKTOR PRODUKSI
Authors: Gianfranco Joshua , Taufik Muhammad Iqbal , Hariadi Febri , Fauzi Muchammad
Published: May 2022

Industry in each country has increased, as well as industry in Indonesia which is experiencing a fairly rapid increase. The improvement of product quality is that it can be done by carrying out maintenance to the machine used by the company. Total Productive Maintenance (TPM) is a process of machine maintenance carried out in industry to maximize and can increase productivity. PT XYZ is a manufacturing company that produces chemicals used for fabric production. This study aims to measure the level of effectiveness of the equipment used in PT. XYZ and measure how effective total equipment production. Determine the causal factors of low Overall Equipment Effectiveness (OEE) value and identify losses incurred, by providing proposed improvements in the factory by applying the TPM method. OEE values obtained in reactor engines at the plant in the period January-October 2021 with an average value reached of 55.63% - 60.60% are still below the overall equipment effectiveness (OEE) standard value caused by Quality Ratio which is still below jipm standard with an average value of 98.54%. Each company can find out the effectiveness of the machine used by using calculations of the level of effectiveness of equipment using the Total Productive Maintenance (TPM) method based on overall equipment effectiveness (OEE)values. Method is used to measure the number TPM by using the Overall equipment effectiveness (OEE) method. The use of this method to provide equipment performance results and accurate calculations to determine the effective engine that will be
KARAKTERISTIK OPERATOR PARANORMAL- * QUASI
Authors: Gunawan Gunawan , Widiyastuti Erni
Published: May 2022

Given Hilbert space  H  over the fields of  . This study aimed to investigate the paranormal- * quasi operators and their properties in Hilbert space. The study resulted the properties of paranormal- * quasi operators, hyponormal operator, class A operator, Class A- * operator, p- hyponormal operator for p > 0,   - paranormal operators, compact operator, and the relationship between them
Evaluation of body condition, daily milk production and biochemical parameters during the postpartum period according to calving season in Montbeliard dairy cows reared in the semi-arid region – Algeria
Authors: Chacha Faicel , Gherissi Djallel Eddine , Lamraoui Ramzi , Afri-Bouzebda Farida , Bouzebda Zoubir
Published: May 2022

The aim of this study was to evaluate the effect of calving season on postpartum changes of certain blood metabolites and minerals and of the body condition score evaluation (BCS) in Montbeliard dairy cows reared under semi-arid conditions. Blood samples were collected from 74 clinically healthy dairy cows of 10 semi-intensive Algerian dairy herds once month during a whole year. Animals were grouped according to the occurrence of their calving to four different seasons (autumn, winter, spring and summer). Albumin, urea, glucose, total cholesterol, calcium, phosphorus and magnesium plasma levels were analysed using the colorometric method adapted to each biochemical parameter. One-way repeated measures analysis of variance (ANOVA) showed a significant effect of season (P<0.05, P<0.01 and at P<0.001) on all parameters, except BCS. The highest plasma concentrations of urea nitrogen, albumin, total cholesterol, and phosphorus were recorded in summer, though calcium was significantly lower during this period. A significant negative correlation was found between blood glucose, total cholesterol and phosphorus during winter calving, urea nitrogen in spring calving, and magnesium and calcium in summer calving. The results of this study highlight the evolutionary pattern of blood biochemical metabolites and electrolytes, BCS and daily milk production of Montbeliard dairy cows during the postpartum period according to calving season. They provide reliable information to assess the risk of metabolic activity failures during these very important productive stages, i.e., open days, ascending and peak production periods.
Selective dry cow treatment
Authors: Maćešić Nino , Lojkić Martina , Karadjole Tugomir , Efenfić Maša , Šavorić Juraj , Butković Ivan , Prvanović Babić Nikica , Benić Miroslav , Samardžija Marko , Bačić Goran , Bačić Iva
Published: May 2022

Mastitis je među najčešćim bolestima na farmama mliječnih krava za čije se liječenje i prevenciju koristi najveća količina antibiotika. Učestala, neispravna ili nepotrebna uporaba antimikrobnih sredstava predstavlja veliku prijetnju ubrzanom razvoju antimikrobne rezistencije. Prijenos antimikrobno rezistentnih patogena na ljude moguć je putem mlijeka i mliječnih proizvoda te su propisane smjernice za racionalnu primjenu antimikrobnih sredstava u veterinarskoj medicini. U mliječnoj se industriji najviše antibiotika koristi prilikom zasušivanja krava u svrhu prevencije nastanka mastitisa. U isto vrijeme antibiotici se nepotrebno primjenjuje i u životinja koje nisu inficirane. Iz tog razloga sve više zemalja prelazi na model selektivnog zasušivanja krava. Antibioticima se zasušuju samo inficirane četvrti ili vimena krava, odnosno krave s povećanim rizikom za nastanak infekcije. Jedan od većih problema prilikom uvođenja selektivnog zasušivanja krava je odabir kriterija prema kojem će se odabrati krave koje će biti zasušene antibiotikom. Protokoli za odabir krava trebaju biti dovoljno precizni, jednostavni za interpretaciju, jeftini, sigurni, certificirani i dostupni za uporabu u svim dijelovima zemlje. Kriterij za odabir krava može se temeljiti na mikrobiološkoj pretrazi mlijeka, određivanju BSS prilikom zasušivanja, incidenciji kliničkih mastitisa u laktaciji, paritetu i njihovim međusobnim kombinacijama. Bakteriološka je pretraga mlijeka najpouzdaniji pokazatelj, ali se broj somatskih stanica na posljednjoj mužnji ističe kao pouzdan pokazatelj na temelju kojeg se može provesti selektivno zasušenje bez negativnih učinaka na proizvodnju. Granična vrijednost broja somatskih stanica kao učinkovit i održiv model za donošenje odluka iznosi 100.000 st/mL mlijeka za primiparne i 200.000 st/mL mlijeka za multiparne krave. Uporaba antibiotika za zasušenje samo kod inficiranih četvrti krava omogućava dodatno smanjenje primjene antibiotika. Iako je tijekom godina postignut značajan napredak u razumjevaniju epidemiologije, imunologije, dijagnostike i patogeneze intramamarnih infekcija (IMI) u suhostaju u programima suzbijanja mastitisa naglašava se značenje smještaja krava u suhostaju i prijelaznom razdoblju. Važnost kontrole IMI u suhostaju u svakodnevnoj praksi se često podcjenjuje.
Título en español
Authors: Abdul H. Wahab  , M. A. Lugo-López  , T. W. Scott
Published: May 2022

Se realizaron experimentos de campo para medir el posible efecto residual de aplicaciones previas de P y otros tres en invernadero, para determinar la relación entre la absorción de P y los niveles de P orgánico en el suelo, P inorgánico y P disponible a las plantas. También se estudió el efecto de la temperatura del suelo, las aplicaciones de P y N y la esterilización del suelo sobre la mineralización del P orgánico. Los datos obtenidos bajo condiciones de campo no revelaron diferencias significativas en la respiración de la planta ni en el pH del suelo. Los niveles de P fueron más altos en parcelas que habían recibido 1120 kg/ha de P, con o sin cal, que los obtenidos en las que recibieron cantidades menores. En los experimentos en invernadero se encontró: 1) una alta correlación entre los rendimientos de la parte aérea de las plantas de maíz y la temperatura del suelo, cuando no se abonó con P; 2) una alta correlación entre la concentración y la absorción de P en la planta con la temperatura del suelo, cuando no se aplicó P como abono; 3) la esterilización del suelo con bromuro de metilo aumentó significativamente el nivel de N y redujo el de K en la planta, independientemente de la temperatura del suelo. Se postula que la mineralización del P orgánico en los Ultisols, y quizás en otros suelos tropicales altamente intemperizados, puede explicar, por lo menos en parte, la falta de respuesta a las aplicaciones de abonos fosfatados que generalmente se observa.
Título en español
Authors: A. Beale  , V. E. Green  , J. L. Parrado
Published: May 2022

El efecto del tipo de material vegetativo de la yautía (Xanthosoma caracu Koch & Bouché) usado para la siembra se estudió con relación a las características de las plantas, el rendimiento, y algunos componentes de rendimiento a los 10.5 y 12.5 meses después de la siembra. No hubo diferencias estadísticamente significativas en rendimiento entre las plantas provenientes de los distintos tipos de material vegetativo. Las secciones no apicales del cormo principal produjeron el menor número de plantas por hectárea y el menor número de plantas con un solo vástago por semilla vegetativa por hectárea que los otros tipos de semilla vegetativa. Los cormelos secundarios produjeron menos tallos por semilla vegetativa a los 2 meses de sembrados que los otros tipos de semilla, pero no aumentaron de peso en el período de 10.5 a 12.5 meses después de la siembra como fue el caso con las secciones apicales o con las secciones no apicales. Los resultados indican que el tiempo para completar el ciclo de siembra a cosecha de las plantas provenientes de cormelos secundarios es más corto que la de los provenientes de los otros tipos de semilla. El número de cormelos comerciales producidos por planta fue mayor cuando se usaron cormelos secundarios para la siembra que cuando se usaron otros tipos de semilla vegetativa. Las porciones apicales del cormo principal produjeron plantas que produjeron algo menos (0.6 toneladas métricas/ha) a los 10.5 meses que cuando se usaron cormelos secundarios, y algo más (0.5 toneladas métricas/ha) a los 12.5 meses después de la siembra.
Título en español
Authors: Alvaro Montoya  , Horace D. Graham
Published: May 2022

El mabí es un refresco fermentado muy popular en Puerto Rico, el cual se prepara con la corteza del arbusto mabí (Colubrina elliptica). Muestras de varias fuentes del mabí comercial, de la corteza y del azúcar sin refinar se examinaron para determinar los tipos de microorganismos comunes en ellas. En el mabí comercial se encontraron Enterobacter aerogenes (1), Enterobacter cloacae (2), Citrobacter intermedius (3), y la levadura Saccharomyces cerevisiae (4). En la muestra de la corteza se encontraron 1 y 3, y en la de azúcar, 1, 3 y 4. En las muestras del azúcar también se encontraron una especie de Aspergillus y otra de Penicillium. Para el 78% de los catadores no hubo diferencia en el sabor entre el mabí comercial y el preparado en el laboratorio con cultivos puros de los inóculos 1+2+3+4 o de 1+4. Se concluye que la fermentación del mabí es una fermentación natural. Las bacterias 1, 2 y 3, la levadura,y posiblemente Citrobacter intermedius participan en la fermentación. Escherichia coli, aislado de una muestra solamente, aparentemente no interviene, pero puede estar presente en la bebida por causas insanitarias que la puedan contaminar al prepararla.
Título en español
Authors: J. Vélez-Santiago  , A. Sotomayor-Ríos  , M. A. Lugo-López
Published: May 2022

Un experimento para evaluar el potencial de Stylosanthes guianensis, cv. Endeavour en la zona central montañosa de Puerto Rico y determinar el efecto de varias dosis de P y K sobre los rendimientos de forraje seco, de proteína bruta y su composición química se realizó en un suelo Ultisol de dicha región. El experimento se extendió por 764 días consecutivos. Las dosis de P y K variaron de 0 a 196 y 372 kg/ha y año, respectivamente. Ni el abonamiento con P ni con K aumentaron significativamente el contenido de materia seca, el rendimiento de forraje seco y el rendimiento de proteína bruta en la producción total (10 cosechas), o sea, desde el 23 de octubre de 1973 hasta el 26 de noviembre de 1975. Parece ser que a mayor pluviosidad más altas son las producciones de forraje seco. En el primer año la producción media más altas, 5. 7 Tm/ha se obtuvo en el corte 4 (9 de julio al 9 de septiembre de 1974), el cual coincidió con unos de los períodos más lluviosos, o sea 466 mm. En el segundo año la producción más baja, 0.6 Tm/ha se reflejó en la octava cosecha, comprendida del 12 de abril et 29 de julio de 1975, en uno de los períodos más secos (191 mm). La segunda producción más baja, 0.7 Tm/ha tuvo lugar en los días cortos del año cuando las plantas estaban en plena floración. Los rendimientos de proteína bruta total no se afectaron significativamente po las dosis de P y K. Esta varió de 3.5 (parcelas control) a 4.0 Tm/ ha y año en los 764 días de duración del experimento. El contenido en P del tejido foliar aumentó significativamente con las aplicaciones de P, variando de 0.27% para el tratamiento control a 0.32% para la aplicación de 196 y 186 kg P y K/ ha y año, respectivamente. El contenido en K del tejido foliar no aumentó significantivamente con las aplicaciones de K. De los datos del estudio que aquí se informa se desprende que esta leguminosa tiene un magnífico potencial como productora de forraje seco y proteína bruta (CP). Su potencial de producción anual en términos de proteína bruta alcanzó un 71% del logrado por los mejores tipos de pastas Bermuda disponibles en Puerto Rico cuando estos se cosechan cada 30 días y se abonan intensivamente en la región húmeda montañosa.
Título en español
Authors: D. G. St. Louis  , J. Vélez-Santiago  , J. A. Arroyo-Aguilú  , R. E. McDowell
Published: May 2022

Un estudio para determinar el efecto de un pienso suplementario de alta calidad sobre la tasa de crecimiento de novillas lecheras se realizó en la Subestación de Corozal. Dieciséis novillas con un peso medio de 190 kg se sometieron previamente a un apacentamiento de pasto Angola (Digitaria decumbens), abonado intensamente, por un período de 43 días, al cabo del cual se asignaron en grupos iguales a pacer el pasto Pangola solo (T1) o a pacerlo suplementado con 2.27 kg diarios de bolas hechas de la planta íntegra de maíz (T2). El apacentamiento se realizó a razón de cinco novillas por ha, alternándose cada tratamiento entre cuatro cercados de .40 ha cada uno. La rotación de los animales en ambos tratamientos se realizó simultáneamente. Estos se pesaron a intervalos de 5 a 7 días. El estudio se completó cuando los animales alcanzaron 320 kg de peso medio. Durante las primeras semanas, la suplementación con las bolas de maíz demostró ser detrimental a la ganancia de peso, ya que la ganancia en las novillas en T1 fue mayor que la de las en T2 a causa de la madurez excesiva del pasto en T2. Más adelante, las bolas fueron ventajosas, al agostarse los pastos durante la época de sequía. La ganancia media por día a los 302 días fue de .29 y .44 kg para las novillas en T1 y T2, respectivamente. Se tomaron muestras de los pastos antes y después del apacentamiento cortándose 6 cuadros de 0.84 m2 cada uno en cada ocasión. Las diferencias entre los redimientos del pasto antes y después del apacentamiento fueron significativas. Los tratamientos, el muestreo antes y después del apacentamiento, los ciclos y los pastos arrojaron diferencias significativas. La única interacción significativa fue la de ciclo con muestreo antes y después del apacentamiento, indicando el efecto de las sequías en el consumo del forraje. El estudio demostró que los forrajes de alta calidad en bolas fueron provechosos, cuando se suplieron a las novillas apacentadas en pastos que no eran suculentos ni abundantes. Se deben utilizar las bolas de maíz cuando el crecimiento de los pastos es pobre y de calidad inferior para así reducir el apacentamiento excesivo.
Título en español
Authors: Gerardo Mangual Crespo
Published: May 2022

Una siembra de berenjenas se estableció en la Subestación Experimental de lsabela para evaluar distintos niveles de N, P, K y dos densidades de siembra. Hubo respuesta a N, pero no así a P205 y K2O. Los niveles de N sobre 225 kg/ha aumentaron los rendimientos, pero los aumentos no fueron significativos. No hubo diferencias significativas entre los rendimientos de ambas densidades de siembra. Bajo las condiciones prevalecientes en lsabela 398, 204 y 253 kg/ha de N, P205 y K2O, respectivamente, parecen ser necesarios para un rendimiento máximo de berenjenas.
Título en español
Authors: O. D. Ramírez-Torres  , J. A. Arroyo-Aguilú  , N. Semidey-Laracuente
Published: May 2022

El ramio (Boehmeria nivea (L.) Gaudich) es una planta textil de excelente calidad, rica en proteína y con un potencial como alimento para animales domésticos. Se evaluó en 3 pruebas a etapas de crecimiento de 20, 40 y 60 días de edad en la Subestación Experimental de Gurabo, con respecto a composición química, producción y consumo por novillos Holstein castrados. Los contenidos en proteína bruta y ceniza disminuyeron mientras los de fibra bruta y extracto libre de nitrógeno aumentaron de los 20 a los 60 días de edad. El contenido en extracto etéreo permaneció igual en nuestras cosechadas a los 20 y 40 días pero disminuyó en la de 60 días. Se obtuvieron diferencias significativas (P < .01) en producción de forraje verde entre ramio de 20 y de 40 ó 60 días de edad, y en producción de forraje seco y de proteína bruta entre ramio de 20 y 40 días, 20 y 60 días y 40 y 60 días de edad. Los consumos de forraje verde entre las edades de 20 y 40 días, 20 y 60 días y 40 y 60 días y de forraje seco entre las edades de 20 ó 40 y 60 días fueron significativos (P < .01 ). Se puede concluir que, aunque el ramio es rico en proteína bruta, su producción y consumo son bajos, al compararse con gramíneas tropicales y alfalfa. Sin embargo, su utilización como alimento o como ingrediente en raciones de alimentos para animales, principalmente monogástricos o rumiantes pequeños, es una posibilidad.
Título en español
Authors: J. Vélez-Santiago  , R. E. McDowell  , J. A. Arroyo-Aguilú
Published: May 2022

Se utilizaron los datos de peso vivo de 132 becerros (73 machos y 59 hembras) desde el nacimiento hasta los 18 meses de edad, desde enero de 1973 hasta noviembre de 1977. Los becerros, progenie de toros Holstein y de vacas Holstein puras o cruzadas, se obtuvieron de la Subestación Experimental Agrícola de Corozal de la Universidad de Puerto Rico. El hato consistió de 43 vacas, desechadas de la vaquería debido a desórdenes de salud y a cruzamientos tardíos y de 19 novillas, hijas de vacas de baja producción lechera. Dos toros Holstein se mantuvieron todo el tiempo en el hato para cruzamiento tan pronto fuese posible luego del parto. Los becerros permanecieron con las madres hasta el destete a los 4 meses de edad y luego en pastos separados hasta los 18 meses de edad. Los becerros se castraron a los 6 meses de edad. Los animales utilizaron pastos exclusivamente de gramíneas mixtas: Pangola, Guinea y Para. Los pastos se abonaron a razón de 2240 kg de un análisis 15-5-1 0 por ha y año en cuatro aplicaciones iguales. El apacentamiento se realizó a razón de 2.5 vacas o 5 animales jóvenes por ha. Los valores F debidos a efectos de año y de sexo fueron significativos (P <.05) para todas las edades. Los efectos de año fueron mayores para los grupos de mediana edad (8 a 14 meses). Los efectos de sexo fueron los menores al nacimiento (5.3%), pero explicaron del 10 al 13% de la variación de peso después de los 4 meses. A los 4 meses, los machos alcanzaron un peso medio de 10.1 kg más que las hembras, pero esta diferencia aumentó solamente en 8.0 kg a los 18 meses. La correlación entre los peso al parto y al destete fue alta (+0.92), sugiriendo poco o ningún efecto de interacción de sexo, época de nacimiento o edad de la vaca en cambios de peso al nacer hasta el destete. El intervalo medio entre partos fue de 348 ± 73.1 días, siendo responsable de esto la tasa rápida de cruzamientos y el limitado número de vacas descartadas o eliminadas por esterilidad. Las ganancias diarias medias de los becerros fue de 1.12, 0.27 y 0.56 kg de 0 a 4, 4 a 10 y 10 a 18 meses de edad, respectivamente, sugiriendo que las novillas se pueden cruzar a los 17 meses. Con ganancias diarias medias de 0 .52 a 0.54 kg después de los 18 meses, la edad probable al parto sería alrededor de los 28 meses, con un peso medio de alrededor de 480 kg. Se concluye que el uso en pastoreo de vacas desechadas de vaquerías es viable para la crianza de novillas lecheras, pero para novillas y toros castrados de carne puede ser marginal.
CACAO PRODUCTION ON WELL-DRAINED SOILS ALONG THE BANKS OF THE MAMORE RIVER ON NORTHEASTERN BOLIVIA
Authors: M. A. Lugo-López  , Juan Bauzá-Salas
Published: May 2022

CACAO PRODUCTION ON WELL-DRAINED SOILS ALONG THE BANKS OF THE MAMORE RIVER ON NORTHEASTERN BOLIVIA
Transporte aéreo regional no estado de Mato Grosso do Sul: os fluxos de passageiros e a dinâmica empresarial
Authors: Moreira Jhéssika Carvalho , Pereira Ana Paula Camilo Pereira
Published: May 2022

O presente trabalho busca analisar o setor de transporte aéreo regional no estado de Mato Grosso do Sul, abordando para isso o seu desenvolvimento com a finalidade de compreender como os fluxos aéreos são organizados na dinâmica da circulação. Sendo assim este estudo parte da análise sobre as principais companhias aéreas que atuam nos aeroportos com voos regulares localizados no interior do estado de Mato Grosso do Sul, como os aeroportos de Dourados, Bonito, Corumbá e Três Lagoas. Para isso nos atemos na atuação das companhias aéreas nesses aeroportos, tendo como base a distribuição territorial dos voos e o número passageiros no período de 2016 a 2019. Assim, metodologicamente nos pautamos em pesquisas bibliográficas, análise de dados estatísticos sobre os fluxos e os fixos aeroportuários, além da sistematização e elaboração de gráficos e mapas. Em síntese, entendemos que dois fatores influenciam na dinâmica do setor aéreo no estado: os interesses políticos e seus possíveis investimentos em infraestrutura e, o segundo fator é a atuação empresarial, que organiza todo o ordenamento territorial dos fluxos aéreos por meio da constituição de suas malhas, ou seja, da distribuição territorial de suas rotas e suas estratégias empresariais.
Um “Stopots” no Ensino de Geografia: proposições metodológicas para a abordagem dos conhecimentos geográficos
Authors: Santos Jadson Santiago dos , Silva Manuela Evangelista da
Published: May 2022

A presença dos jogos em nossa sociedade data desde a antiguidade quando os seres humanos já desenvolviam e praticavam diferentes modalidades destas atividades, representando, em sua maioria um momento de socialização, criando um ambiente de desafios individuais e/ou coletivos e de aprendizagem. Sendo um recurso que requer concentração, foco, agilidade, capacidade de percepção e apreensão urge o seguinte questionamento: como os jogos podem ser apropriados enquanto dispositivos didático-pedagógicos para a abordagem de conceitos e temas da ciência geográfica? Diante disso, este artigo objetiva analisar as potencialidades do jogo digital Stopots, como artefato didático-pedagógico para a abordagem de conteúdos da Geografia Escolar, por meio da experiência de aplicação em uma turma de 7º ano do Ensino Fundamental; visto que este tipo de atividade estimula a competitividade, o raciocínio, escrita e associação com conhecimentos geográficos prévios. Durante o desenvolvimento, analisamos os recursos disponíveis e as possibilidades de uso; a forma como os conteúdos podem ser trabalhados/acionados e como foi o desempenho dos/as alunos. Os resultados obtidos apontam que a referida plataforma pode ser utilizada em sala de aula para trabalhar ou revisar conteúdos de forma interativa e colaborativa, sem restrições quanto à modalidade presencial ou remota.
Letter from the Editors
Authors: Newburry William , Rose Elizabeth L.
Published: May 2022

This article introduces the new AIB Insights editorial team of William Newburry and Elizabeth Rose, and overviews some of their goals for their 2022-2024 term as the journal’s editors. The editorial also summarizes this issue’s five articles. These articles address timely and relevant topics, including the specificity and uniqueness of the international business field, development of an agenda for practice-oriented research, whether de-globalization is a myth or a reality, the potential for using international business innovation practices to transform the United Nations, and what we can learn about organizational alignment and location choices from the current semiconductor chip shortage.
STUDENTS' MOTIVATION IN ENHANCING ENGLISH COMMUNICATION PROFICIENCY IN DONG NAI TECHNOLOGY UNIVERSITY, VIETNAM
Authors: Duc Nguyen Van , Hanh Le Thi
Published: May 2022

The study was conducted with the aim of finding out some main determinants related to the students’ speaking performance, not to eliminate them fast because that is impossible, at the present time, how to learn and encourage them gradually to solve the problems. The researcher believes that, when the students are clearly aware of the problems that they are encountering, they will be more positive in coping with them and improve them unconsciously. The descriptive method of research was utilized in this study to gather the necessary data and information. The independent variables are students’ motivation including their: achievement, competence motivation, power motivation, attitude motivation and incentive motivation. And the dependent variables of the students’ speaking proficiency include their: grammatical competence, strategic competence, discourse competence and sociolinguistic competence. The dependent variable focuses on English proficiency: accuracy and fluency. The respondents of the study were 30 English major students from Faculty of Foreign Languages and 6 teachers who were teaching English there, Dong Nai Technology University (DNTU).

 

 Article visualizations: