Distribution of diatoms in relation to the character of water masses and currents off southern California in 1938

In 1938 the E.W. Scripps made six cruises at intervals of two months, covering on each cruise the same area off the coast of southern California. The station plan is shown in Figure 37, but not all stations indicated in that figure could be occupied on each cruise owing to unfavorable weather conditions and the short time available for completion of the work. On all cruises observations of temperature, salinity, and oxygen were made between the surface and a depth of 600 meters...

Psykososialt arbeidsmiljø på tre servicekontor i offentlig sektor – hvordan opplever medarbeiderne sin yrkeshverdag?

Denne rapporten omhandler hvordan ansatte i førstelinjen i offentlig sektor opplever sitt arbeidsmiljø. Undersøkelsen ble gjennomført ved tre servicekontor i offentlig sektor. Det ble foretatt 8 intervjuer med frontservice personell om deres oppfattelse av det psykososiale arbeidsmiljøet. Målet med undersøkelsen var to delt. For det første, å sammenligne resultatene fra de tre kontorene for å se om det var noen fellestrekk eller ikke i det psykososiale arbeidsmiljøet, og om disse eventuelle fellestrekkene i arbeidsmiljøet kan si noe om generelle arbeidsmiljøbetingelser i serviceyrket i offentlig sektor. Eller er det slik at hvert individ med sine personlige forutsetninger opplever arbeidsmiljøet forskjellig? For det andre, å finne nye problemstillinger og tema når det gjelder frontservice og psykososialt arbeidsmiljø, som kan være aktuelle å undersøke videre. Resultatene viste at fellestrekkene i arbeidsmiljøet viste seg å omfatte store deler av det fysiske arbeidsmiljøet, herunder støy, luftkvalitet og temperatur. I tillegg var det viktig å være sosial og kunne samarbeide. Videre oppfattet alle de spurte arbeidsdagen som hektisk, og at de hadde liten mulighet til å bestemme tempo og planlegge arbeidsdagen selv. Spennvidden lå i hvilke utfordringer de følte de hadde i arbeidet, hvilke evner de følte de fikk brukt, og forventninger til arbeidet. Det ble avdekket flere tema og problemstillinger som kan være aktuelle å undersøke videre, herunder; tiltak for å bedre arbeidsmiljøet, dilemmaet i ”forvaltningens to ansikter”, omstilling i offentlig sektor konsekvenser for arbeidsmiljø samt omfanget av stress og emosjonell utmattelse blant førstelinjen. Ved økt fokus på det psykososiale arbeidsmiljøet, kan en ved å avdekke hvilke arbeidsmiljøbetingelser som er generelle, finne ut hvilke tiltak som bør igangsettes for å bedre hverdagen i førstelinjen.English: This article concerns how employees in front service in public sector perceive the psychosocial work environment. The study was conducted in three front service offices in public sector. 8 interviews with front service personnel were carried out in order to reveal their perception of the psychosocial environment at their workplace. The aim of the study was twofold. First, to compare the results from the three offices in order to identify similarities or not in the psychosocial work environment, and whether or not these potential similarities in the psychosocial work environment can tell us if there exists any general work environment conditions in front service in public sector. Or is it so that every individual with its personal preferences perceives the psychosocial environment at their workplace differently? Second, to discover new subjects and approaches in front service and psychosocial work environment that can lead to further studies. The results showed that the similarities to a large extent included the physical work environment, hereby noise, air quality and temperature. Also, it seemed to be important to be able to cooperate and to be social. Further, they all agreed that their working day was rather hectic, and that they had minor possibilities to decide the pace at work, and to plan their working day. The variation constituted the employees’ perceptions about challenges at work, which abilities they felt they used, and expectations towards work. Several subjects and approaches were discovered, such as; plans to improve the psychosocial work environment, the dilemma of “the public administrators two faces”, reorganization in public sector and consequences for psychosocial work environment, and the amount of stress and emotional exhaustion among front service personnel. Through increased focus on the psychosocial work environment, one can reveal which conditions of the psychosocial work environment that are general, and hence create plans for making a better work environment for front service personnel

A repurposing strategy for Hsp90 inhibitors demonstrates their potency against filarial nematodes

Novel drugs are required for the elimination of infections caused by filarial worms, as most commonly used drugs largely target the microfilariae or first stage larvae of these infections. Previous studies, conducted in vitro, have shown that inhibition of Hsp90 kills adult Brugia pahangi. As numerous small molecule inhibitors of Hsp90 have been developed for use in cancer chemotherapy, we tested the activity of several novel Hsp90 inhibitors in a fluorescence polarization assay and against microfilariae and adult worms of Brugia in vitro. The results from all three assays correlated reasonably well and one particular compound, NVP-AUY922, was shown to be particularly active, inhibiting Mf output from female worms at concentrations as low as 5.0 nanomolar after 6 days exposure to drug. NVP-AUY922 was also active on adult worms after a short 24 h exposure to drug. Based on these in vitro data, NVP-AUY922 was tested in vivo in a mouse model and was shown to significantly reduce the recovery of both adult worms and microfilariae. These studies provide proof of principle that the repurposing of currently available Hsp90 inhibitors may have potential for the development of novel agents with macrofilaricidal properties

Quantitative localized proton-promoted dissolution kinetics of calcite using scanning electrochemical microscopy (SECM)

Scanning electrochemical microscopy (SECM) has been used to determine quantitatively the kinetics of proton-promoted dissolution of the calcite (101̅4) cleavage surface (from natural “Iceland Spar”) at the microscopic scale. By working under conditions where the probe size is much less than the characteristic dislocation spacing (as revealed from etching), it has been possible to measure kinetics mainly in regions of the surface which are free from dislocations, for the first time. To clearly reveal the locations of measurements, studies focused on cleaved “mirror” surfaces, where one of the two faces produced by cleavage was etched freely to reveal defects intersecting the surface, while the other (mirror) face was etched locally (and quantitatively) using SECM to generate high proton fluxes with a 25 μm diameter Pt disk ultramicroelectrode (UME) positioned at a defined (known) distance from a crystal surface. The etch pits formed at various etch times were measured using white light interferometry to ascertain pit dimensions. To determine quantitative dissolution kinetics, a moving boundary finite element model was formulated in which experimental time-dependent pit expansion data formed the input for simulations, from which solution and interfacial concentrations of key chemical species, and interfacial fluxes, could then be determined and visualized. This novel analysis allowed the rate constant for proton attack on calcite, and the order of the reaction with respect to the interfacial proton concentration, to be determined unambiguously. The process was found to be first order in terms of interfacial proton concentration with a rate constant k = 6.3 (± 1.3) × 10–4 m s–1. Significantly, this value is similar to previous macroscopic rate measurements of calcite dissolution which averaged over large areas and many dislocation sites, and where such sites provided a continuous source of steps for dissolution. Since the local measurements reported herein are mainly made in regions without dislocations, this study demonstrates that dislocations and steps that arise from such sites are not needed for fast proton-promoted calcite dissolution. Other sites, such as point defects, which are naturally abundant in calcite, are likely to be key reaction sites

Specialists in ancient trees are more affected by climate than generalists

Ancient trees are considered one of the most important habitats for biodiversity in Europe and North America. They support exceptional numbers of specialized species, including a range of rare and endangered wood-living insects. In this study, we use a dataset of 105 sites spanning a climatic gradient along the oak range of Norway and Sweden to investigate the importance of temperature and precipitation on beetle species richness in ancient, hollow oak trees. We expected that increased summer temperature would positively influence all wood-living beetle species whereas precipitation would be less important with a negligible or negative impact. Surprisingly, only oak-specialist beetles with a northern distribu- tion increased in species richness with temperature. Few specialist beetles and no generalist beetles responded to the rise of 4°C in summer as covered by our cli- matic gradient. The negative effect of precipitation affected more specialist species than did temperature, whereas the generalists remained unaffected. In summary, we suggest that increased summer temperature is likely to benefit a few specialist beetles within this dead wood community, but a larger number of specialists are likely to decline due to increased precipitation. In addition, generalist species will remain unaffected. To minimize adverse impacts of climate change on this impor- tant community, long-term management plans for ancient trees are important

Radiocarbon distributions in Southern Ocean dissolved and particulate organic matter

Dissolved organic carbon (DOC) is the largest actively exchanging pool of organic carbon in the ocean, yet its sources and sinks are not well constrained. The average C-14 ages of DOC in the deep N. Atlantic and N. Pacific Oceans are 4,000 [Bauer et al., 1992; Druffel et al., 1992] and 6,000 years [Williams and Druffel, 1987], respectively, and represent the beginning and end of the deep ocean conveyor [Broecker, 1991]. Here we report that the deep Southern Ocean DOC has a C-14 age (5,600 y) much closer to that of the deep N. Pacific, but its concentration in seawater (41 +/- 2 mu M) is nearly equal to that of the deep N. Atlantic. The radiocarbon and concentration data indicate that most, but not all, deep DOC is transported conservatively with the ocean\u27s conveyor. A younger (post-bomb) source of DOC to the N. Atlantic is the most likely explanation for the large age difference we observe between deep DOC in the Atlantic and Southern Oceans. Other possibilities are a source of older DOC or a smaller microbial sink in the S. Ocean, or perhaps a possible slowdown of S. Ocean deep water formation during the past century [Broecker et at, 1999]

Seasonal and inter-annual variability in nutrient supply in relation to mixing in the Bay of Biscay

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