Academic literature on the topic '700/.79'
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Journal articles on the topic "700/.79"
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Nemec, S. "Effects of Dihydrofusarubin and Isomarticin fromFusarium solanion Carbohydrate Status and Metabolism of Rough Lemon Seedlings." Phytopathology 79, no. 6 (1989): 700. http://dx.doi.org/10.1094/phyto-79-700.
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Palombo, Cecilia. "Caliphs and Merchants: Cities and Economies of Power in the Near East (700–950), Fanny Bessard (2020)." International Journal of Islamic Architecture 13, no. 1 (January 1, 2024): 280–82. http://dx.doi.org/10.1386/ijia_00140_5.
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Review of: Caliphs and Merchants: Cities and Economies of Power in the Near East (700–950), Fanny Bessard (2020) Oxford: Oxford University Press, 400 pp., 79 b&w and 31 colour illus., ISBN: 978-0-19885-582-8, $125 (hardback)
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Bachet, Gérard. "Collision-induced spectra for H2-He interactions from 79 to 248 K between 200 and 700 cm-1." Journal of Quantitative Spectroscopy and Radiative Transfer 39, no. 4 (April 1988): 327–31. http://dx.doi.org/10.1016/0022-4073(88)90008-8.
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Zehr, B. E., M. E. Williams, D. R. Duncan, and J. M. Widholm. "Somaclonal variation in the progeny of plants regenerated from callus cultures of seven inbred lines of maize." Canadian Journal of Botany 65, no. 3 (March 1, 1987): 491–99. http://dx.doi.org/10.1139/b87-061.
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Callus cultures were initiated from immature embryos of three dent corn inbred lines: FR27rhm (B73 derivative), 79-R4443, and EXL1; and four sweet corn (sh-2) inbred lines: f84-267, f84-275, f84-278, and f84-700. Extensive qualitative variation was noted in self-pollinated progeny of plants regenerated from callus of FR27rhm, EXL1, and f84-700; quantitative variation was measured in self-pollinated progeny of plants regenerated from cultures of almost all inbreds. Most qualitative mutations were visible in the first self-pollinated generation; chimerism in regenerated plants was indicated by initial segregation of some mutants after two self-pollinations. All culture-induced mutant phenotypes were similar to known spontaneous mutations in maize; preliminary data indicate most have single-gene recessive inheritance. For qualitative variation, average mutation frequencies per regenerated plant were calculated as 0.18, 0.71, and 0.64 for FR27rhm, EXL1, and f84-700, respectively. Differences in mutation frequency among the four sweet corn lines were determined to have a genetic basis. Significant quantitative variation included alterations in date of pollen shed and silk emergence, silk emergence relative to pollen shed, plant height, ear, and kernel characteristics. These results show genotypic differences in the extent of qualitative somaclonal variation, with some quantitative variation having possible applications for conventional corn breeding programs.
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Munin, F. S., M. L. Schwantes, A. R. Schwantes, and O. Moreira-Filho. "NADP-dependent isocitrate dehydrogenase of Astyanax scabripinnis (Pisces, Characidae) from three altitudes at Grande Stream, Campos do Jordão, SP." Brazilian Journal of Biology 64, no. 2 (May 2004): 273–82. http://dx.doi.org/10.1590/s1519-69842004000200013.
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Electrokinetic, thermic, and kinetic properties of products of NADP-dependent isocitrate dehydrogenase (IDHP; EC 1.1.1.42) loci of Astyanax scabripinnis (Pisces, Characidae) collected at three different altitudes (700 m, 1,800 m, and 1,920 m) of Grande Stream at Campos do Jordão, State of São Paulo, Brazil, were analyzed. Two IDHP bidirectionally divergent loci, a single skeletal muscle, the IDHP-A*, and a single liver IDHP-B*, both polymorphic, were detected in the three different altitude populations. The variant allele *128 at the IDHP-A* locus, had its highest frequency detected in the 1,920 m population (0.494). Among the nine variant alleles detected at the IDHP-B* locus (*37, *57, *69, *79, *85, *114, *119, *124, and *140), the *37 and 79 were detected only in 1,800 m population. Chi-square values showed that only the 700 m population is not in Hardy-Weinberg equilibrium for the IDHP-A* locus, while for the IDHP-B* locus, no population is. Homogeneity Chi² test indicated that the populations are significantly different in their A and B phenotype frequencies. Wright's FST mean value (0.036 and 0.32, IDHP-A* and IDHP-B*, respectively) was 0.178 for the three altitude populations which means that 82% of total genetic diversity was found among individuals of each one of the populations. Stability at environmental temperatures (16º to 21ºC), and apparent Km and Vmax values of each A-phenotype skeletal muscle crude extract suggest different roles of A-isoforms during the increased lipogenesis that occurs in fish at low temperatures.
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Chuikov, R. S., S. S. Chuikov, A. S. Stavyshenko, and V. A. Vasilkovich. "Studying Temperature Effects on Internal Microstresses in Indexable Inserts Made of (Ti,W)C-Co Group Hard Alloys." Key Engineering Materials 736 (June 2017): 35–39. http://dx.doi.org/10.4028/www.scientific.net/kem.736.35.
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The article is dedicated to investigating the problem of increasing the efficiency of modular cutting tools with indexable inserts made of hard tool alloys and to describe the most typical types of their damages. The article justifies the relevance of studying the temperature effect of cutting inserts made of (Ti,W)C–Co group hard tool alloys on internal microstresses of the 2nd kind. It contains the data of X-ray studies of samples of hard (TiC 30% WC 66% Co 4%), (TiC 15% WC 79% Co 6%) and (TiC 5% WC 85% Co 10%) alloys using XRD 7000 Shimadzu Maxima automated diffractometer with an add-on heater at temperatures from 20 to 700°C.
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Pagliari, Michele, Dario Montinaro, Emanuele Martelli, Stefano Campanari, and Alessandro Donazzi. "Experimental Analysis of the Effect of Cathodic CO2 Supply to Industrial Solid Oxide Fuel Cells." ECS Meeting Abstracts MA2023-01, no. 54 (August 28, 2023): 105. http://dx.doi.org/10.1149/ma2023-0154105mtgabs.
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The integration of Solid Oxide Fuel Cells (SOFCs) in hybrid power generation systems offers the opportunity to achieve higher electric efficiencies. In the SOS-CO2 cycle [1], a newly developed cycle for blue power production (i.e., power generated starting from natural gas while capturing CO2), the SOFC cathode is supplied with mixtures of CO2 and O2, up to 79% CO2 molar fraction, while the anode is supplied with a reformate feed, containing H2, CH4, CO, CO2, and water vapour. Aim of this work is to experimentally evaluate the performance and the durability of industrial 5x5 cm2 Ni-YSZ anode-supported SOFCs under the SOS-CO2 cycle conditions, focusing on the effects of the CO2-rich cathodic atmosphere. The cells mounted a LSCF-based (La0.6Sr0.4Co0.2Fe0.8O3) single phase cathode, coated by a current collection layer of LSC (La0.6Sr0.4CoO3). Laboratory tests were performed at 700°C, acquiring polarization (I/V) curves and EIS spectra by means of a Horiba – FuelCon C50 Evaluator test station. Initial investigations with 7% humidified H2 and 21/79 O2/CO2 cathodic mixture revealed 25% power loss compared to the base case with cathodic air. The test showed not only that the loss of performance was stable in time, but also that the power reduction was reversible since the initial performance in air was recovered. The EIS spectra showed an increase of the polarization resistance and of the ohmic resistance upon feeding CO2. This latter observation suggested a reduction of the electronic conductivity of the cathode, compatible with the formation of Sr carbonates on the perovskite surface [2–4]. To assess the performance of the SOFC under the operating conditions of the SOS-CO2 cycle, the anode was supplied with reformate. Compared to the base case with humidified hydrogen and air, the current density at 0.7 V decreased by 37% (490 mA/cm2). When supplying the 21/79 O2/CO2 mixture at the cathode, the current density stabilized at 420 mA/cm2 (Figure 1). Durability tests (over 300 h) at 700°C with reformate and 21/79 O2/CO2 mixture highlighted a moderate decrease of the current density at 0.7 V. After these tests, the cathode was characterized post-mortem with XRD, SEM and Raman to analyse the consequences of the prolonged exposure to CO2. To further quantify the effect of CO2 on the cathode, symmetric button cells were also characterized with EIS, measuring ohmic and polarization resistances. The results suggested that the adsorption of CO2 is reversible and indicated a better suitability of LSCF- compared to LSC-based cathodes for operations with CO2-rich mixtures. Experiments performed between 550 and 700°C at varying CO2 and O2 partial pressures allowed to describe the kinetics of the oxygen reduction reaction and extract its activation energy. Overall, the results provided key elements for the integration of SOFCs in the SOS-CO2 blue power technology. References [1] R. Scaccabarozzi, M. Gatti, S. Campanari, and E. Martelli, “Solid oxide semi-closed CO2 cycle: A hybrid power cycle with 75% net efficiency and zero emissions,” Appl. Energy, vol. 290, no. February, p. 116711, 2021. [2] Y. Chen et al., “A highly active, CO2-tolerant electrode for the oxygen reduction reaction,” Energy Environ. Sci., vol. 11, no. 9, pp. 2458–2466, Sep. 2018. [3] Y. Yu et al., “Chemical characterization of surface precipitates in La0.7Sr0.3Co0.2Fe0.8O3-δ as cathode material for solid oxide fuel cells,” J. Power Sources, vol. 333, pp. 247–253, Nov. 2016. [4] J. Hwang et al., “CO2 Reactivity on Cobalt-Based Perovskites,” J. Phys. Chem. C, vol. 122, no. 35, pp. 20391–20401, 2018. Figure 1 - Polarization curves of 5x5 cm2 industrial SOFC supplied with 1.0 Nl/min of 7% humidified hydrogen and 2.5 Nl/min of air (black); 0.5 Nl/min of reformate mixture and 1.2 Nl/min of air (red); 0.5 Nl/min of reformate mixture and 1.2 Nl/min of cathodic 21% O2 / 79% CO2 mixture (green). Figure 1
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Islam, S. Z., M. Babadoost, and Y. Honda. "Effect of Red Light Treatment of Seedlings of Pepper, Pumpkin, and Tomato on the Occurrence of Phytophthora Damping-off." HortScience 37, no. 4 (July 2002): 678–81. http://dx.doi.org/10.21273/hortsci.37.4.678.
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A study was conducted in the greenhouse to investigate the effects of red light (600-700 nm) on the subsequent occurrence of seedling infection of bell pepper, pumpkin, and tomato caused by Phytophthora capsici. Three- or 4-week-old seedlings were inoculated with zoospores or transplanted into pots filled with artificially infested soil mix. Red light treatment of seedlings reduced Phytophthora damping-off by up to 79%. Only 21% to 36% of red light-treated seedlings became infected, whereas 78% to 100% of the control seedlings, grown either in natural daylight (NDL) or under white light (WL), became infected and died. The height, and fresh and dry weight of seedlings treated with red light were significantly higher than those grown under NDL or WL.
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Selano, Maria Karolina. "Hubungan Lama Menderita Dengan Kejadian Neuropati Diabetikum Pada Pasien Diabetes Melitus." Jurnal Smart Keperawatan 8, no. 2 (December 21, 2021): 129. http://dx.doi.org/10.34310/jskp.v8i2.505.
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Organisasi Internasional Diabetes Federation (IDF) memperkirakan terdapat 463 juta orang pada usia 20-79 tahun di dunia menderita diabetes mellitus (DM) tahun 2019 atau setara dengan angka 9,3% dari total penduduk pada usia yang sama. Berdasarkan jenis kelamin, IDF memperkirakan prevalensi DM tahun 2019 yaitu 9% pada perempuan dan 9,65% pada laki-laki. Prevalensi diabetes meningkat seiring penambahan umur menjadi 19,9% atau 111,2 juta orang (umur 65-79 tahun). Angka diprediksi meningkat hingga 578 juta di tahun 2030 dan 700 juta di tahun 2045. Pusat Data dan Informasi PERSI (Perhimpunan Rumah Sakit Indonesia), prevalensi penderita DM dengan komplikasi neuropati sebesar lebih dari 50%. Tujuan untuk mengetahui hubungan lama menderita dengan kejadian neuropati diabetikum pada pasien diabetes melitus Metode secara deskriptif analitik dengan pendekatan cross sectional dan tehnik pengambilan sampel menggunakan purposive sampling sejumlah 84 responden/ pasien diabetes melitus tipe 1 dan tipe 2. Instrumen menggunakan kuesioner dan monofilament test dan data dianalisa dengan uji statistik chi-square. Hasil didapatkan 71 responden (84,5 %) yang lama menderita DM < 5 tahun, 46 responden (54,8%) mengalami neuropati diabetikum dan nilai Asymp Sig 0,942 (P-value = 0,005). Karena nilai 0,942 > 0,005, maka disimpulkan tidak ada hubungan yang signifikan antara lama menderita dengan kejadian neuropati diabetikum.Kata kunci : diabetes melitus; lama menderita; neuropati diabetikumThe Relationship Of Long Suffering With The Event Of Diabetic Neuropaty In Diabetes Mellitus PatientsAbstractThe International Diabetes Federation (IDF) estimates that there are 463 million people aged 20-79 years in the world suffering from diabetes mellitus (DM) in 2019, equivalent to 9.3% of the total population at the same age. Based on gender, IDF estimates that the prevalence of DM in 2019 is 9% in women and 9.65% in men. The prevalence of diabetes increases with increasing age to 19.9% or 111.2 million people (aged 65-79 years). The figure is predicted to increase to 578 million in 2030 and 700 million in 2045. According to the PERSI Data and Information Center (Indonesian Hospital Association), the prevalence of DM sufferers with neuropathic complications is more than 50%. The purpose of this study was to determine the relationship between length of stay and the incidence of diabetic neuropathy in patients with diabetes mellitus. Descriptive analytical method with a cross sectional approach and sampling technique used purposive sampling with a total of 84 respondents/patients with type 1 and type 2 diabetes mellitus. The instrument used a questionnaire and monofilament test and data. analyzed by chi-square statistical test. The results showed that 71 respondents (84.5%) had long suffered from DM < 5 years, 46 respondents (54.8%) had diabetic neuropathy and the Asymp Sig value was 0.942 (P-value = 0.005). Because the value is 0.942 > 0.005, it is concluded that there is no significant relationship between the length of suffering and the incidence of diabetic neuropathy.Keywords: diabetes mellitus; long suffering; diabetic neuropathy
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Mea, Arsene, Stanilas Sedagbande, Kouakou Jean Claude Abo, Gohi Parfait Kahou Bi, and Koffi Joseph N'guessan. "Diuretic Activity of Hibiscus sabdariffa L. in Wistar Rats." International Journal of Pharmacology, Phytochemistry and Ethnomedicine 9 (April 2018): 10–17. http://dx.doi.org/10.18052/www.scipress.com/ijppe.9.10.
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The diuretic effect of aqueous extract of Hibiscus sabdariffa has always been noted by the early botanists who studied the plant. On the other hand, very little scientific work to confirm this state of affairs has been done. In this pharmacological study, we provide scientific evidence to previous observations. Using an electrolyte analyzer to evaluate urinary volume and ions and appropriate experimental protocols on wistar strain rats, we have shown that: The aqueous extract of Hibiscus sabdariffa (AEHS) administered at doses of 200, 500 and 700 mg / kg BW induces a dose-dependent and significant increase in urinary excretion in rats. This increase was 12.75 ± 1.971 mL / kg, 23.20 ± 2.082 mL / kg and 29.42 ± 2.097 mL / kg BW, respectively is after 24 hours. That is a respective increase of 55.5, 182 and 333% compared to the control. The aqueous extract of Hibiscus sabdariffa (AEHS) uses at the dose of 700 mg / kg BW results in a reduction of the first urination time by 26.30% compared to the control. The determination of electrolytes in rats treated with 700 mg / kg BW after 24 hours showed high concentrations of sodium, potassium and chlorine in the urine. These different concentrations are for sodium of 72.51%, potassium of 76.54% and 58.81% for chlorine relative to the concentration of the controls. Compared to AEHS, hydrochlorothiazide at 25 mg / kg BW results in urinary excretion of 80.79% sodium, 85.30% potassium and 75.97% chlorine. Similarly with furosemide uses at 20 mg / kg BW), the concentrations are 86% sodium, 79% potassium and 71.58% chlorine. Compared with control rats, the Na + / K + ratio did not vary significantly in the treated animals. AEHS is therefore a diuretic substance like hydrochlorothiazide and furosemide.
Dissertations / Theses on the topic "700/.79"
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Escott, Anthony James. "Alan Cuthbert : colour theory and practice [1957 -79] English art school change in the early 1960s." Thesis, Kingston University, 2005. http://eprints.kingston.ac.uk/20219/.
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The core of this research are the paintings and cultural context of Alan Cuthbert, a hitherto un-researched figure who trained in the English art school of the late 1950s under the Constructionists Kenneth and Mary Martin and subsequently became the Head of the Foundation course at Wimbledon School of Art from 1963-1979. Cuthbert produced a substantial body of over a hundred geometric abstract paintings, lecture papers and writing and played a significant role in training future generations of artists and designers from the 1960s onwards. This thesis proposes that Cuthbert is part of a broader tendency in British art schools and that practice and teaching is intimately connected to the reorganisation of the art schools and the introduction of the Foundation course in the early 196Ös. I put forward the argument that through a study of Cuthbert and the shifts in art schools one can map a much under-researched aspect of British art. This research encompasses the three fields of art history, art education and art practice and centres on an artist-lecturer, a subject of study largely ignored by the majority of art historical writing, which is dominated by the modernist model of monographs, movements/groupings, and periods. In placing the case study of an artist-lecturer in a critical and historical context, this study maps British art through organicism, Constructivism and the Bauhaus art school pedagogy and colour as they pertain to basic design and the changes in art school teaching between 1955 and 1979. Through this case study of a colourist and systems painter this thesis suggests a different, Continental orientation for British post-war geometric abstraction.
Books on the topic "700/.79"
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Culture Incorporated: Museums, Artists, and Corporate Sponsorships. University of Minnesota Press, 2002.
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Culture Incorporated: Museums, Artists, and Corporate Sponsorships. University of Minnesota Press, 2002.
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Culture Incorporated: Museums, Artists, and Corporate Sponsorships. University of Minnesota Press, 2002.
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Culture Incorporated: Museums, Artists, and Corporate Sponsorships. University of Minnesota Press, 2002.
Find full textBook chapters on the topic "700/.79"
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Rana, Monika, and Meenakshi Rana. "Some Folk Antidiabetic Medicinal Herb of Himachal Pradesh." In Alternative Medicine - Update. IntechOpen, 2021. http://dx.doi.org/10.5772/intechopen.94188.
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The Prevalence of Diabetes Mellitus (DM) is increasing day by day at an alarming worldwide. As per the statics of International Diabetic Federation, currently worldwide approximately 463 million adults (20–79 years) affected with diabetes that is expected to increase rise to 700 million by 2045. Diabetes and its complications imposes an economic loss to people with diabetes and their families, and to health systems and national economy. Diabetes is a complex disease which link with multiple of factors. Present reviewdocument the information of traditional used Antidiabetic plants by the inhabitants of Nadaun, District Hamirpur, Himachal Pradesh, India. During the survey 31 Medicinal Plants have been documented on the basis of information collected from the respondents of the study area.
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Sternberg, Cora N., Fabio Calabró, Luca Marini, and Paola Scavina. "Systemic Chemotherapy Of Muscle-Invasive Bladder Cancer." In Bladder Cancer, 299–315. Oxford University PressNew York, NY, 1999. http://dx.doi.org/10.1093/oso/9780192630384.003.0016.
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Abstract Bladder cancer is the fifth most common cancer in men and the seventh in women, with 52 900 cases in the United States in 1996 and 11 700 deaths (1,2). The male to female occurrence is 3: 1. It is, primarily a disease of the elderly, with 80% of cases in the 50–79 year age group, and a peak incidence in the seventh decade. The majority of patients are diagnosed at an early, treatable stage. At initial presentation 75% of bladder tumours are superficial, limited to the mucosa, submucosa, or lamina propria. Recurrence after initial treatment for superficial tumours is discovered in 50–80% of patients. Progression to muscle-invasive disease occurs in 10–25%. For patients with muscle-invasive bladder cancers, there is a 50% risk of distant metastases. It is important to identify those tumours that are biologically aggressive and that have the potential to result in mortality. For patients with metastatic disease progress continues to be made with the development of new chemotherapeutic regimens.
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Sello Seroka, Ntalane, and Lindiwe Khotseng. "Recent Advances in Bio-Derived Nanomaterials: Green Synthesis of Silica." In Green Chemistry for Environmental Sustainability - Prevention-Assurance-Sustainability (P-A-S) Approach [Working Title]. IntechOpen, 2023. http://dx.doi.org/10.5772/intechopen.1002429.
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Silica molecules present in commercial objects can pose a hazard to human health, which is why the environmentally friendly synthesis of silica has been intensively researched in the recent decades. This chapter describes the synthesis of silica from sugarcane bagasse waste and its physical and chemical properties for potential use in eco-friendly applications. Sugarcane bagasse was burned to produce ash, which was then calcined in a 700°C kiln before being treated with citric acid to remove silica from the ash. X-ray fluorescence (XRF) analysis showed that after the acid treatment, 78–79% of the silica was produced and strong peaks were observed in the X-ray diffraction spectra (XRD) at 2Ɵ = 28 (degree) and an average diameter of 28 nm for 1-HDTA and 30 nm for TPAH, determined by the Scherrer equation. Fourier transform infrared spectroscopy (FTIR) spectra also confirms the presence of synthesized silica. In addition, the shape of the particles was analyzed by TEM and SEM images and it is found that synthesized silica had a spongy shape with irregular sizes ranging from 25 to 50 nm. Overall, the studies show that organic bases are capable of synthesizing silica with application-specific properties from agricultural waste using green chemistry.
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Kassam, Amir, Theodor Friedrich, and Rolf Derpsch. "State of the global adoption and spread of Conservation Agriculture." In Burleigh Dodds Series in Agricultural Science, 1–14. Burleigh Dodds Science Publishing, 2022. http://dx.doi.org/10.19103/as.2021.0088.01.
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Chapter 2 in volume 1 provided a detailed account of the global adoption and spread of Conservation Agriculture (CA) up to the year 2015/16. This chapter provides an update of the global adoption and spread of CA for the year up to 2018/19. In 2008/09, global CA cropland area was 106.5 M ha spread across 36 countries. In 2013/14, the global area of CA cropland was 156.7 M ha, spread across 55 countries. In 2015/16, the global area of CA cropland was 180.4 M ha, spread across 79 countries. In 2018/19, the CA area increased to 205.4 M ha (14.7% of global cropland), spread across 102 countries. Thus, CA increased by some 50 M ha of cropland for each of the two five-year periods, 2008/09 to 2013/14, and 2014/15 to 2018/19. About 50% of the global CA area is located in the Global South and 50% in the Global North. At the regional level, 4% of the CA area in 2008/09 was in Europe (including Russia and Ukraine), Asia and Africa whereas in 2018/19, it was 16%. Since 2008/09, greater percentage gains in CA area have been recorded for Europe, Asia and Africa regions. At the national level, countries that have increased their CA areas significantly are Brazil, Argentina, Paraguay and Uruguay in South America; the USA and Canada in North America; Russia and Ukraine; Spain, France, the UK, Italy and Romania in Europe; China, India, Kazakhstan, Pakistan and Iran in Asia; South Africa, Zambia and Ghana in Africa, and Australia. CA systems have an important role to play in addressing the global burden of environmental crises and in meeting the Sustainable Development Goals. The 8th World Congress on Conservation Agriculture agreed to work towards a notional goal of transforming 50% of global cropland area or 700 M ha into CA by 2050. CA global community must continue its effort to improve the quality and performance of CA systems by incorporating biological or organic CA practices. Equally important for the future is the need to support smallholder farmers transform their conventional systems to CA systems with support from sustainable mechanization.
Conference papers on the topic "700/.79"
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Norris, Patrick J., and John Cunningham. "Gas Turbine Application Over Thirty Years in a Middle East Oil Production Facility." In ASME 1988 International Gas Turbine and Aeroengine Congress and Exposition. American Society of Mechanical Engineers, 1988. http://dx.doi.org/10.1115/88-gt-249.
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Kuwait Oil Company (KOC) has installed and operated gas turbines since 1957. There are currently 79 Gas Turbines ranging in size from 700 to 33,000 H.P. of various types, from industrial to aero-derivative. Gas turbines provide more than half a million in horsepower, which is more than 80% of the power, for machinery and power generation at KOC. This paper covers the introduction and the rappid growth of gas turbine power at KOC. Operational sites at KOC are subject to severe heat, dust and humidity. The experience in the operation and maintenance in the early years of the gas turbines at KOC are described. Gas turbines have played a major role in the success of the Company.
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Reboussin, Beth, Kimberly Wagoner, Erin Sutfin, Jennifer Cornacchione Ross, Cynthia Suerken, Edgar Alfonso Romero-Sandoval, and Allison Lazard. "The impact of cannabis edible packaging elements on appeal, harm perceptions and knowledge: an experimental study among a national convenience sample of adults in the United States." In 2022 Annual Scientific Meeting of the Research Society on Marijuana. Research Society on Marijuana, 2022. http://dx.doi.org/10.26828/cannabis.2022.02.000.05.
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The state-legalized cannabis industry is rapidly evolving, and regulators lack scientific data as to how product packaging should be regulated to protect public health. Cannabis edibles in particular pose unique public health and regulatory challenges. While smoking cannabis results in an immediate high, intoxication from consuming edibles can be delayed up to 2 hours or more which can lead to overconsumption of THC, particularly by naïve users. The packaging of edibles as appealing food products may also reduce harm perceptions. The goal of this pilot study was to examine the impact of flavor imagery and a cannabis warning on product appeal, harm perceptions, knowledge, and willingness to try edibles. We recruited a convenience sample of 700 adults ages 19-79 (mean age 38), 52% female, 77% white, 14% Hispanic, 59% college-educated from Amazon Mechanical Turk (MTurk). Participants were randomized to one of four experimental conditions to view a cannabis edible package that varied by presence of fruit imagery (yes/no) and type of warning (Washington State cannabis warning; control warning). More than half of our sample had tried edibles and 36% were current users. Participants viewing packages with fruit imagery were significantly more likely (p<0.05) than participants viewing packages without fruit imagery to think the product was appealing (69% vs 39%) and safe to consume (69% vs 52%) and were more likely to want to try the product (58% vs 39%). Among participants exposed to the cannabis warning, only 42% believed the package clearly indicated how to safely consume it and fewer than half knew the correct serving size, which was not significantly different than those not viewing the warning. Only 17% of those viewing the warning knew the effects could be delayed by more than two hours. These results provide preliminary evidence of the impact of product packaging on appeal, knowledge, harm perceptions and willingness to try cannabis edibles and demonstrate the need for improved, edible-specific warnings to educate consumers about safe use.
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Yan, K., B. An, and Q. Yuan. "Unraveling the Role of Water in Microwave/Electromagnetic-Assisted Catalytic Heating for Hydrogen Production from Gas Reservoirs." In SPE Annual Technical Conference and Exhibition. SPE, 2023. http://dx.doi.org/10.2118/214884-ms.
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Abstract To cope with the increasing pressures of decarbonization that the petroleum industry is facing, a novel approach, entitled in-situ microwave/electromagnetic-assisted catalytic heating technology, is recently proposed for hydrogen (H2) production directly from petroleum reservoirs. This work investigates H2 generation from methane (CH4) cracking in the presence of sandstone rock powders under microwave irradiation through a purpose-designed lab-scale microwave reactor system. The role of water and rock minerals during reactions is also examined. The real-time variations of measured temperature of rock samples, gas flow rate, and concentration of hydrogen and other generated gases are monitored. Deuterium oxide, or the so-called heavy water (D2O), is used to track the sources of hydrogen from methene and water. A rapid temperature increase is identified for the sandstone samples during microwave heating, which is referred to as the "temperature soaring" (TS) phenomenon. The TS phenomenon happens at 560-590 ℃ under microwave irradiation at a relatively higher power. Once TS phenomenon occurs, the sample can be easily re-heated up to 700 ℃ using a low microwave power at less than 0.3 kW. The experimental results show that Fe-based and other metal minerals in the sandstone rocks have an evident natural catalytic effect for promoting CH4 conversion to H2. The H2 production with 1.0 mol.% concentration starts at a measured temperature of 392 ℃, followed by a maximum H2 concentration and CH4 conversion at 91 mol.% and 79% respectively as the temperature reaches 668 ℃. Furthermore, in the presence of D2O, a peak concentration of 4.9 mol.% D2 gas and 18.2 mol.% HD gas are generated during methane conversion to hydrogen experiments. Further, water can enhance H2 generation via coke gasification in a temperature range from 330-580 ℃. Additionally, negligible CO2 and minor CO are generated in the experiments when methane continuously flows through the sandstone samples and converted to hydrogen under microwave irradiation. The proposed technology potentially opens a new pathway for clean H2 production directly from natural gas reservoirs.
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Mohammed, Zuhayr Pasha, Ramees Khaleel Rahman, Michael Pierro, Justin Urso, and Subith Vasu. "DME-Propane Ignition Delay Time Measurements at Mixing Controlled Compression Ignition Engine-Relevant Conditions." In WCX SAE World Congress Experience. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2023. http://dx.doi.org/10.4271/2023-01-0330.
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<div class="section abstract"><div class="htmlview paragraph">The blend of dimethyl ether (DME, CH<sub>3</sub>OCH<sub>3</sub>) and propane (C<sub>3</sub>H<sub>8</sub>) is a potentially renewable fuel mixture that has the potential to replace diesel in compression ignition engines. The combination can potentially reduce particulate and greenhouse gas emissions compared to a conventional diesel engine operating under similar conditions. However, detailed conceptual and simulation studies must be conducted before adopting a new fuel on a compression ignition engine. For these simulations, accurate chemical kinetic models are necessary. However, the validity of chemical kinetic mechanisms in the literature is unknown for mixing controlled compression ignition (MCCI) engine operating conditions. Hence, in this work, we studied the ignition of dimethyl ether (DME) and propane blends in a shock tube at MCCI engine conditions. Ignition delay time (IDT) data was collected behind the reflected shock for DME-propane mixtures for heavy-duty compression ignition (CI) engine parameters. Undiluted experiments spanning temperatures of 700 to 1100 K and pressures of 55 to 84 bar for various blends (100% CH<sub>3</sub>OCH<sub>3</sub>/ 0% C<sub>3</sub>H<sub>8,</sub> 100% C<sub>3</sub>H<sub>8</sub>/ 0% CH<sub>3</sub>OCH<sub>3</sub>, 60% CH<sub>3</sub>OCH<sub>3</sub>/ 40% C<sub>3</sub>H<sub>8</sub>) of DME and propane were combusted in synthetic air (21% O<sub>2</sub>/ 79% N<sub>2</sub>). Some experiments were conducted at higher pressures (90-120 bar) to understand model performance at these conditions. Comparisons of IDT were made with the predictions of recent chemical kinetic mechanisms for DME-propane mixture, including the Aramco3.0, NUIG, and Dames et al. mechanisms. All mechanisms overpredicted IDT compared to experimental values. Sensitivity analysis was conducted with Dames et al. model, and critical reactions sensitive to IDT of DME-propane mixture near 100 bar are outlined.</div></div>