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  1. Article ; Online: Estimation of Optimum Utilization of Ruminant Feed Resources on Tropical Dry-Land during Dry and Rainy Seasons

    Handayanta, E. / Subagiyo, I. / Hartutik, H. / Kusmartono, K. / Steenstra, F.A. / Oosting, S.J.

    Iranian Journal of Applied Animal Science

    2022  Volume 12, Issue 2

    Abstract: This study aimed to estimate the optimum utilization of ruminant feed resources in tropical dry-land during dry and rainy seasons. Data concerning feed availability and quality were collected from Gunungkidul Regency of Indonesia over two seasons: the ... ...

    Abstract This study aimed to estimate the optimum utilization of ruminant feed resources in tropical dry-land during dry and rainy seasons. Data concerning feed availability and quality were collected from Gunungkidul Regency of Indonesia over two seasons: the dry and rainy seasons. The JAVA program, the model, was used to estimate the availability of feed for ruminants associated with mean live weight gain (MLWG) and total live weight production (TLWP). The results showed that the maximum production in the dry season was obtained when 18% dry matter (DM) was used (MLWG 0.33 kg/animal unit (AU)/day, herd size (HS) 197 AU, and TLWP 11.94 tons/season), or in the rainy season, when 46% DM was used (MLWG 0.18 kg/AU/day, HS 1116 AU, and TLWP 37.22 tons/season). Furthermore, when only 100% was used, it could feed a maximum of 1500 AU and 2968 AU in the dry and rainy seasons, respectively. Without the transfer of feed from one season to another, a constant number, 350 AU, was obtained for HS, with a maximum TLWP of 19.16 tons/year. On the other hand, when the feed was kept constant at 34% dry matter (DM), a maximum TLWP obtained was 32.32 tons/year which is enough 420 and 820 animal units in the dry and rainy season, respectively. It was concluded that to obtain maximum TLWP in each season, only 14.5% to 46% of available DM feed should be used, as most of the available feed was of very low quality
    Keywords Animal production ; Dry season ; Dry-land farming ; Rainy season ; Ruminant feed
    Subject code 630
    Language English
    Publishing country nl
    Document type Article ; Online
    ISSN 2251-628X
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  2. Article ; Online: Depletion of potassium and sodium in mantles of Mars, Moon and Vesta by core formation.

    Steenstra, E S / Agmon, N / Berndt, J / Klemme, S / Matveev, S / van Westrenen, W

    Scientific reports

    2018  Volume 8, Issue 1, Page(s) 7053

    Abstract: The depletions of potassium (K) and sodium (Na) in samples from planetary interiors have long been considered as primary evidence for their volatile behavior during planetary formation processes. Here, we use high-pressure experiments combined with laser ...

    Abstract The depletions of potassium (K) and sodium (Na) in samples from planetary interiors have long been considered as primary evidence for their volatile behavior during planetary formation processes. Here, we use high-pressure experiments combined with laser ablation analyses to measure the sulfide-silicate and metal-silicate partitioning of K and Na at high pressure (P) - temperature (T) and find that their partitioning into metal strongly increases with temperature. Results indicate that the observed Vestan and Martian mantle K and Na depletions can reflect sequestration into their sulfur-rich cores in addition to their volatility during formation of Mars and Vesta. This suggests that alkali depletions are not affected solely by incomplete condensation or partial volatilization during planetary formation and differentiation, but additionally or even primarily reflect the thermal and chemical conditions during core formation. Core sequestration is also significant for the Moon, but lunar mantle depletions of K and Na cannot be reconciled by core formation only. This supports the hypothesis that measured isotopic fractionations of K in lunar samples represent incomplete condensation or extensive volatile loss during the Moon-forming giant impact.
    Language English
    Publishing date 2018-05-04
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2615211-3
    ISSN 2045-2322 ; 2045-2322
    ISSN (online) 2045-2322
    ISSN 2045-2322
    DOI 10.1038/s41598-018-25505-6
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article: The optimal approach in hip hemiarthroplasty: a cohort of 1009 patients.

    de Vries, E N / Gardenbroek, T J / Ammerlaan, H / Steenstra, F / Vervest, A M J S / Hogervorst, M / van Velde, R

    European journal of orthopaedic surgery & traumatology : orthopedie traumatologie

    2019  Volume 30, Issue 4, Page(s) 569–573

    Abstract: Background: A hip hemiarthroplasty is the treatment of choice for a displaced femoral neck fracture in elderly patients not eligible for total hip arthroplasty. There is continuing debate about the optimal surgical approach for this operation, with the ... ...

    Abstract Background: A hip hemiarthroplasty is the treatment of choice for a displaced femoral neck fracture in elderly patients not eligible for total hip arthroplasty. There is continuing debate about the optimal surgical approach for this operation, with the most commonly used approaches being posterior and lateral.
    Objective: To compare the outcomes of the posterior and the lateral approaches in patients with a displaced femoral neck fracture treated by hemiarthroplasty.
    Method: A retrospective study was carried out in two high-volume teaching hospitals in the Netherlands. Electronic patient records were searched for patient characteristics, the operative approach and adverse outcomes.
    Results: A total of 1009 patients with a median age of 86 years were included. The posterior approach was used in 51.1% of patients. There were no differences in surgical site infection and periprosthetic fracture rates. There was a trend towards more dislocations in the posterior approach (2.9% vs. 1.4% with an OR of 2.1, 95% CI 0.8-5.1). An uncemented hemiprosthesis was used in 62.7% of patients. Deep surgical site infections and periprosthetic fractures occurred more often in the uncemented group (OR 2.9 and 7.4, respectively).
    Conclusion: No differences in adverse outcomes between both approaches could be shown. This study did confirm the relatively high incidence of post-operative complications in uncemented prostheses. Therefore, the cemented prosthesis should be the treatment of choice, with the approach dependent on surgeon preference and experience.
    MeSH term(s) Aged, 80 and over ; Arthroplasty, Replacement, Hip/adverse effects ; Arthroplasty, Replacement, Hip/instrumentation ; Arthroplasty, Replacement, Hip/methods ; Bone Cements/therapeutic use ; Cohort Studies ; Female ; Femoral Neck Fractures/epidemiology ; Femoral Neck Fractures/surgery ; Hemiarthroplasty/adverse effects ; Hemiarthroplasty/instrumentation ; Hemiarthroplasty/methods ; Hip Prosthesis/adverse effects ; Humans ; Incidence ; Male ; Netherlands/epidemiology ; Postoperative Complications/diagnosis ; Postoperative Complications/epidemiology ; Postoperative Complications/etiology ; Treatment Outcome
    Chemical Substances Bone Cements
    Language English
    Publishing date 2019-12-19
    Publishing country France
    Document type Journal Article
    ZDB-ID 1231084-0
    ISSN 1432-1068 ; 1633-8065 ; 0948-4817 ; 0940-3264
    ISSN (online) 1432-1068
    ISSN 1633-8065 ; 0948-4817 ; 0940-3264
    DOI 10.1007/s00590-019-02610-4
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Depletion of potassium and sodium in mantles of Mars, Moon and Vesta by core formation

    E. S. Steenstra / N. Agmon / J. Berndt / S. Klemme / S. Matveev / W. van Westrenen

    Scientific Reports, Vol 8, Iss 1, Pp 1-

    2018  Volume 10

    Abstract: Abstract The depletions of potassium (K) and sodium (Na) in samples from planetary interiors have long been considered as primary evidence for their volatile behavior during planetary formation processes. Here, we use high-pressure experiments combined ... ...

    Abstract Abstract The depletions of potassium (K) and sodium (Na) in samples from planetary interiors have long been considered as primary evidence for their volatile behavior during planetary formation processes. Here, we use high-pressure experiments combined with laser ablation analyses to measure the sulfide-silicate and metal-silicate partitioning of K and Na at high pressure (P) – temperature (T) and find that their partitioning into metal strongly increases with temperature. Results indicate that the observed Vestan and Martian mantle K and Na depletions can reflect sequestration into their sulfur-rich cores in addition to their volatility during formation of Mars and Vesta. This suggests that alkali depletions are not affected solely by incomplete condensation or partial volatilization during planetary formation and differentiation, but additionally or even primarily reflect the thermal and chemical conditions during core formation. Core sequestration is also significant for the Moon, but lunar mantle depletions of K and Na cannot be reconciled by core formation only. This supports the hypothesis that measured isotopic fractionations of K in lunar samples represent incomplete condensation or extensive volatile loss during the Moon-forming giant impact.
    Keywords Medicine ; R ; Science ; Q
    Subject code 550
    Language English
    Publishing date 2018-05-01T00:00:00Z
    Publisher Nature Portfolio
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  5. Article ; Online: Association Between the Type of First Healthcare Provider and the Duration of Financial Compensation for Occupational Back Pain.

    Blanchette, Marc-André / Rivard, Michèle / Dionne, Clermont E / Hogg-Johnson, Sheilah / Steenstra, Ivan

    Journal of occupational rehabilitation

    2016  Volume 27, Issue 3, Page(s) 382–392

    Abstract: ... for the worker's compensation system. Further investigation is required to understand the between-provider differences. ...

    Abstract Objective To compare the duration of financial compensation and the occurrence of a second episode of compensation of workers with occupational back pain who first sought three types of healthcare providers. Methods We analyzed data from a cohort of 5511 workers who received compensation from the Workplace Safety and Insurance Board for back pain in 2005. Multivariable Cox models controlling for relevant covariables were performed to compare the duration of financial compensation for the patients of each of the three types of first healthcare providers. Logistic regression was used to compare the occurrence of a second episode of compensation over the 2-year follow-up period. Results Compared with the workers who first saw a physician (reference), those who first saw a chiropractor experienced shorter first episodes of 100 % wage compensation (adjusted hazard ratio [HR] = 1.20 [1.10-1.31], P value < 0.001), and the workers who first saw a physiotherapist experienced a longer episode of 100 % compensation (adjusted HR = 0.84 [0.71-0.98], P value = 0.028) during the first 149 days of compensation. The odds of having a second episode of financial compensation were higher among the workers who first consulted a physiotherapist (OR = 1.49 [1.02-2.19], P value = 0.040) rather than a physician (reference). Conclusion The type of healthcare provider first visited for back pain is a determinant of the duration of financial compensation during the first 5 months. Chiropractic patients experience the shortest duration of compensation, and physiotherapy patients experience the longest. These differences raise concerns regarding the use of physiotherapists as gatekeepers for the worker's compensation system. Further investigation is required to understand the between-provider differences.
    MeSH term(s) Back Pain/economics ; Back Pain/therapy ; Chiropractic/statistics & numerical data ; Cohort Studies ; Employment/statistics & numerical data ; Female ; Humans ; Male ; Occupational Injuries/economics ; Occupational Injuries/therapy ; Physical Therapists/statistics & numerical data ; Physicians/statistics & numerical data ; Proportional Hazards Models ; Recurrence ; Time Factors ; Workers' Compensation/economics ; Workers' Compensation/statistics & numerical data
    Language English
    Publishing date 2016-09-15
    Publishing country Netherlands
    Document type Journal Article
    ZDB-ID 1171536-4
    ISSN 1573-3688 ; 1053-0487
    ISSN (online) 1573-3688
    ISSN 1053-0487
    DOI 10.1007/s10926-016-9667-9
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Workers' characteristics associated with the type of healthcare provider first seen for occupational back pain.

    Blanchette, Marc-André / Rivard, Michèle / Dionne, Clermont E / Hogg-Johnson, Sheilah / Steenstra, Ivan

    BMC musculoskeletal disorders

    2016  Volume 17, Issue 1, Page(s) 428

    Abstract: ... factors and by the worker's age, income and community size. Contrary to previous studies, the workers ...

    Abstract Background: Few studies have compared the factors that drive patients' decision to choose a chiropractor, physician or physiotherapist as their first healthcare provider for occupational back pain. The purpose of this study is to identify characteristics associated with the choice of first healthcare provider seen for acute uncomplicated occupational back pain.
    Methods: We analyzed data collected by the Workplace Safety and Insurance Board from a cohort of workers with compensated back pain in 2005 in Ontario (Canada). Multivariable logistic regression models were created to identify factors associated with the type of first healthcare provider seen (chiropractor, physician, or physiotherapist). Adjustments to the final models were evaluated using the area under the receiver-operating characteristics curve (ROC).
    Results: According to the 5520 analyzed claims, 85.3 % of the patients saw a physician, 11.4 % saw a chiropractor, and 3.2 % saw a physiotherapist. Longer job tenure (odds ratio (OR) = 1.02, P = 0.004), higher gross personal income (OR = 1.06, P = 0.018), mixed-manual job (OR = 1.35, P = 0.004) and previous similar injury (OR = 1.60, P < 0.001) increased the odds of seeing a chiropractor rather than a physician, while the size of the community (>500,000 inhabitants) and the availability of an early return to work program in the workplace (OR = 0.77, P = 0.035) decreased it. The odds of seeing a physiotherapist rather than a physician increased with increasing age (OR = 1.19, P = 0.019), previous similar injury (OR = 1.71, P < 0.001) and severity of injury (OR = 2.03, P = 0.010). Increased age (OR = 1.28, P = 0.008) and size of community (>1,500,000 inhabitants; OR = 2.58, P = 0.002) increased the odds of seeing a physiotherapist rather than a chiropractor, while holding a mixed-manual job significantly decreased those odds (OR = 0.63, P = 0.044). The area under the ROC curve of our multivariable models varied from 0.62 to 0.64.
    Conclusion: The type of first healthcare provider sought for occupational back pain is influenced by injury-and work-related factors and by the worker's age, income and community size. Contrary to previous studies, the workers who first sought a physician did not have higher odds of having a severe injury.
    MeSH term(s) Adult ; Cohort Studies ; Decision Making ; Female ; Humans ; Logistic Models ; Low Back Pain/therapy ; Male ; Manipulation, Chiropractic/statistics & numerical data ; Middle Aged ; Occupational Injuries/therapy ; Odds Ratio ; Ontario ; Patient Preference/statistics & numerical data ; Physical Therapists/statistics & numerical data ; Physicians/statistics & numerical data ; ROC Curve
    Language English
    Publishing date 2016-10-18
    Publishing country England
    Document type Comparative Study ; Journal Article
    ISSN 1471-2474
    ISSN (online) 1471-2474
    DOI 10.1186/s12891-016-1298-y
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: Which Characteristics are Associated with the Timing of the First Healthcare Consultation, and Does the Time to Care Influence the Duration of Compensation for Occupational Back Pain?

    Blanchette, Marc-André / Rivard, Michèle / Dionne, Clermont E / Steenstra, Ivan / Hogg-Johnson, Sheilah

    Journal of occupational rehabilitation

    2016  Volume 27, Issue 3, Page(s) 359–368

    Abstract: Purpose To identify the characteristics associated with the timing of the first healthcare consultation and to measure the impact of that timing on the duration of the first episode of compensation for occupational back pain following the injury. Methods ...

    Abstract Purpose To identify the characteristics associated with the timing of the first healthcare consultation and to measure the impact of that timing on the duration of the first episode of compensation for occupational back pain following the injury. Methods We analyzed data from a cohort of workers with compensated back pain in 2005 in Ontario obtained from the Workplace Safety and Insurance Board. Cox multivariable survival models were performed to identify factors associated with the time to care and to measure its association with the length of the first episode of 100 % compensation. Results Among the 5520 claims analyzed, 93.7 % of workers accessed care within the first week (average = 2.1 days; median = 1 day). Time to care was shorter for males, for workers who had received previous compensation and for those with access to an early return to work program. Age, number of employees in the company and personal earnings were positively associated with the time to care. More severe nature of injury, employers doubt about the work-relatedness of the injury and consulting a physiotherapist as the first healthcare provider were also associated with longer time to care. Considering potential confounders, longer time to care was significantly associated with a delay in the end of the first episode of compensation (hazard ratio = 0.98; P < 0.001). Conclusion Temporal access to a source of care is not problematic for the vast majority of Ontarian workers who receive compensation for occupational back pain; however, for the minority of workers who do not rapidly access care, the timing of the first healthcare consultation is a significant predictor of the duration of the first episode of compensation.
    MeSH term(s) Age Factors ; Disability Evaluation ; Female ; Humans ; Injury Severity Score ; Kaplan-Meier Estimate ; Low Back Pain/therapy ; Male ; Occupational Injuries/therapy ; Ontario ; Proportional Hazards Models ; Retrospective Studies ; Sex Factors ; Time-to-Treatment ; Workers' Compensation/statistics & numerical data
    Language English
    Publishing date 2016-09-15
    Publishing country Netherlands
    Document type Journal Article
    ZDB-ID 1171536-4
    ISSN 1573-3688 ; 1053-0487
    ISSN (online) 1573-3688
    ISSN 1053-0487
    DOI 10.1007/s10926-016-9665-y
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article: Calibration of a multi-anvil high-pressure apparatus to simulate planetary interior conditions.

    Knibbe, J S / Luginbühl, S M / Stoevelaar, R / van der Plas, W / van Harlingen, D M / Rai, N / Steenstra, E S / van de Geer, R / van Westrenen, W

    EPJ techniques and instrumentation

    2018  Volume 5, Issue 1, Page(s) 5

    Abstract: This paper presents the setup and pressure calibration of an 800-ton multi-anvil apparatus installed at the Vrije Universiteit (Amsterdam, the Netherlands) to simulate pressure-temperature conditions in planetary interiors. This high-pressure device can ... ...

    Abstract This paper presents the setup and pressure calibration of an 800-ton multi-anvil apparatus installed at the Vrije Universiteit (Amsterdam, the Netherlands) to simulate pressure-temperature conditions in planetary interiors. This high-pressure device can expose cubic millimeter sized samples to near-hydrostatic pressures up to ~ 10 GPa and temperatures exceeding 2100 °C. The apparatus is part of the Distributed Planetary Simulation Facility (DPSF) of the EU Europlanet 2020 Research Infrastructure, and significantly extends the pressure-temperature range that is available through international access to this facility.
    Language English
    Publishing date 2018-07-04
    Publishing country Germany
    Document type Journal Article
    ZDB-ID 2769516-5
    ISSN 2195-7045
    ISSN 2195-7045
    DOI 10.1140/epjti/s40485-018-0047-z
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article ; Online: The lunar core can be a major reservoir for volatile elements S, Se, Te and Sb.

    Steenstra, Edgar S / Lin, Yanhao / Dankers, Dian / Rai, Nachiketa / Berndt, Jasper / Matveev, Sergei / van Westrenen, Wim

    Scientific reports

    2017  Volume 7, Issue 1, Page(s) 14552

    Abstract: ... partitioning experiments to show that the observed low concentrations of volatile elements sulfur (S), selenium ... that Moon formation was not accompanied by major loss of S, Se, Te, Sb from Moon-forming materials ... consistent with recent indications from lunar carbon and S isotopic compositions of primitive lunar materials ...

    Abstract The Moon bears a striking compositional and isotopic resemblance to the bulk silicate Earth (BSE) for many elements, but is considered highly depleted in many volatile elements compared to BSE due to high-temperature volatile loss from Moon-forming materials in the Moon-forming giant impact and/or due to evaporative loss during subsequent magmatism on the Moon. Here, we use high-pressure metal-silicate partitioning experiments to show that the observed low concentrations of volatile elements sulfur (S), selenium (Se), tellurium (Te), and antimony (Sb) in the silicate Moon can instead reflect core-mantle equilibration in a largely to fully molten Moon. When incorporating the core as a reservoir for these elements, their bulk Moon concentrations are similar to those in the present-day bulk silicate Earth. This suggests that Moon formation was not accompanied by major loss of S, Se, Te, Sb from Moon-forming materials, consistent with recent indications from lunar carbon and S isotopic compositions of primitive lunar materials. This is in marked contrast with the losses of other volatile elements (e.g., K, Zn) during the Moon-forming event. This discrepancy may be related to distinctly different cosmochemical behavior of S, Se, Te and Sb within the proto-lunar disk, which is as of yet virtually unconstrained.
    Language English
    Publishing date 2017-11-06
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2615211-3
    ISSN 2045-2322 ; 2045-2322
    ISSN (online) 2045-2322
    ISSN 2045-2322
    DOI 10.1038/s41598-017-15203-0
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article ; Online: Systematic Review of Prognostic Factors for Return to Work in Workers with Sub Acute and Chronic Low Back Pain.

    Steenstra, Ivan A / Munhall, Claire / Irvin, Emma / Oranye, Nelson / Passmore, Steven / Van Eerd, Dwayne / Mahood, Quenby / Hogg-Johnson, Sheilah

    Journal of occupational rehabilitation

    2016  Volume 27, Issue 3, Page(s) 369–381

    Abstract: Purpose We systematically reviewed the evidence on factors that predict duration of sick leave in workers after 6 weeks low back pain (LBP) related sick leave. We hypothesized that different factors affect the duration of the leave depending on the time ... ...

    Abstract Purpose We systematically reviewed the evidence on factors that predict duration of sick leave in workers after 6 weeks low back pain (LBP) related sick leave. We hypothesized that different factors affect the duration of the leave depending on the time away from work. Methods The review occurred in seven phases: (1) developing the central question, (2) conducting the literature search, (3) identifying relevant publications, (4) quality appraisal, (5) data extraction, (6) evidence synthesis, and (7) knowledge translation. We searched for studies that reported episodes of LBP and sick leave that lasted more than 6 weeks. All included studies reported at least one prognostic factor where return to work was the outcome. Results We identified twenty-two relevant publications. The impact of pain, functional status and radiating pain seems to change with duration of work disability. Workers' recovery expectations remain important after 6 weeks. Modified duties are rarely studied in later phases of work disability. Depression/mental health did not appear to be an important factor in later phases. Workplace physical factors remain important. There is insufficient evidence that pain catastrophising and fear avoidance are predictive factors in later phases. There was moderate evidence for age in the later phases. Functional capacity and claim related factors were supported by some evidence. Discusion Physical demands in the workplace are preventing workers from getting back to work in a timely fashion across phases. The psychosocial work environment is understudied in later phases. Overall, we cannot conclude that prognostic factors change over time.
    MeSH term(s) Acute Pain/psychology ; Acute Pain/rehabilitation ; Age Factors ; Chronic Pain/psychology ; Chronic Pain/rehabilitation ; Disability Evaluation ; Injury Severity Score ; Low Back Pain/psychology ; Low Back Pain/rehabilitation ; Prognosis ; Return to Work/psychology ; Return to Work/statistics & numerical data ; Self Report ; Sex Factors ; Sick Leave/statistics & numerical data ; Time Factors
    Language English
    Publishing date 2016-10-14
    Publishing country Netherlands
    Document type Journal Article ; Review ; Research Support, Non-U.S. Gov't ; Systematic Review
    ZDB-ID 1171536-4
    ISSN 1573-3688 ; 1053-0487
    ISSN (online) 1573-3688
    ISSN 1053-0487
    DOI 10.1007/s10926-016-9666-x
    Database MEDical Literature Analysis and Retrieval System OnLINE

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