bluuebunny/crossref_metadata_2025 huggingface dataset:
Xylan-Modified-Based Hydrogels with Temperature/pH Dual Sensitivity and Controllable Drug Delivery Behavior
Authors: Kong Wei-Qing , Gao Cun-Dian , Hu Shu-Feng , Ren Jun-Li , Zhao Li-Hong , Sun Run-Cang
Published: March 2017

Among the natural macromolecules potentially used as the scaffold material in hydrogels, xylan has aroused great interest in many fields because of its biocompatibility, low toxicity, and biodegradability. In this work, new pH and thermoresponsive hydrogels were prepared by the cross-linking polymerization of maleic anhydride-modified xylan (MAHX) with N-isopropylacrylamide (NIPAm) and acrylic acid (AA) under UV irradiation to form MAHX-g-P(NIPAm-co-AA) hydrogels. The pore volume, the mechanical properties, and the release rate for drugs of hydrogels could be controlled by the degree of substitution of MAHX. These hydrogels were characterized by swelling ability, lower critical solution temperature (LCST), Fourier-transform infrared (FTIR), and SEM. Furthermore, the cumulative release rate was investigated for acetylsalicylic acid and theophylline, as well as the cytocompatibility MAHX-based hydrogels. Results showed that MAHX-based hydrogels exhibited excellent swelling–deswelling properties, uniform porous structure, and the temperature/pH dual sensitivity. In vitro, the cumulative release rate of acetylsalicylic acid for MAHX-based hydrogels was higher than that for theophylline, and in the gastrointestinal sustained drug release study, the acetylsalicylic acid release rate was extremely slow during the initial 3 h in the gastric fluid (24.26%), and then the cumulative release rate reached to 90.5% after sustained release for 5 h in simulated intestinal fluid. The cytotoxicity experiment demonstrated that MAHX-based hydrogels could promote cell proliferation and had satisfactory biocompatibility with NIH3T3 cells. These results indicated that MAHX-based hydrogels, as new drug carriers, had favorable behavior for intestinal-targeted drug delivery.
Inhibitors of BRD4 Protein from a Marine-Derived Fungus Alternaria sp. NH-F6
Authors: Ding Hui , Zhang Dashan , Zhou Biao , Ma Zhongjun
Published: March 2017

Bromodomains (BRD) are readers of the epigenetic code that regulate gene transcription through their recognition of acetyl-lysine modified histone tails. Recently, bromodomain-containing proteins such as BRD4 have been demonstrated to be druggable through the discovery of potent inhibitors. These protein–protein interaction inhibitors have the potential to modulate multiple diseases by their profound anti-inflammatory and antiproliferative effects. In order to explore new BRD4 inhibitors as well as lead compounds for the development of new drugs, the secondary metabolites of Alternaria sp. NH-F6, a fungus isolated from deep-sea sediment samples, were analyzed systematically. Five new compounds including two new perylenequinones (1–2), one new alternaric acid (3), 2-(N-vinylacetamide)-4-hydroxymethyl-3-ene-butyrolactone (4), one new cerebroside (5), together with 19 known compounds (6–24) were isolated from the ethyl acetate extracts of this strain. Their structures were elucidated using nuclear magnetic resonance (NMR) and high resolution electrospray ionization mass spectrometry (HR-ESI-MS) analyses. Finally, all these compounds were evaluated for their inhibitory activity against BRD4 protein, and compound 2 exhibited a potent inhibition rate of 88.1% at a concentration of 10 µM. This research provides a new BRD4 inhibitor which may possess potential antitumoral, antiviral, or anti-inflammatory pharmaceutical values.
Impact of the Solidification Rate on the Chemical Composition of Frozen Cryolite Bath
Authors: Poncsák Sándor , Kiss László , Guérard Sébastien , Bilodeau Jean-François
Published: March 2017

Solidification of cryolite (Na3AlF6)-based bath takes place at different rates along the sideledge, and around alumina rafts and new anodes. The solidification rate has a significant impact on the structure and the chemical composition that determine the thermal conductivity and thus the thickness of sideledge, or the duration of the existence of the temporary frozen bath layers in other cases. Unfortunately, samples that can be collected in industrial cells are formed under unknown, spatially and temporally varying conditions. For this reason, frozen bath samples were created under different heat flux conditions in a well-controlled laboratory environment using the so-called cold finger technique. The samples were analyzed by X-ray Diffractometer (XRD) and Scanning Electron Microscope (SEM) in Back Scattering (BS) mode in order to obtain spatial distribution of chemical composition. Results were correlated with structural analysis. XRD confirmed our earlier hypothesis of recrystallization of cryolite to chiolite under medium heat flux regime. Lower α-alumina, and higher γ-alumina content in the samples obtained with very high heating rate suggest that fast cooling reduces α–γ conversion. In accordance with the expectation, SEM-BS revealed significant variation of the Na/Al ratio in the transient sample.
A Model for Assessing Pedestrian Corridors. Application to Vitoria-Gasteiz City (Spain)
Authors: Delso Javier , Martín Belén , Ortega Emilio , Otero Isabel
Published: March 2017

From a mobility perspective, walking is considered to be the most sustainable transport mode. One of the consequences of motor-oriented urban configuration on pedestrian mobility is urban fragmentation, which affects sustainability in cities. In this paper, we use a natural-based approach to landscape fragmentation and connectivity (inherited from landscape ecology) for pedestrian mobility planning. Our aim is to design a useful methodology to identify priority pedestrian corridors, and to assess the effects of implementing barrier-free pedestrian corridors in the city. For this purpose, we developed a method that integrates Geographical Information Systems (GIS) network analysis with kernel density methods, which are commonly used for designating habitat corridors. It was applied to Vitoria-Gasteiz (Spain). Pedestrian mobility was assessed by comparison of travel times between different scenarios. Results show that the implementation of pedestrian corridors reduces travel time by approximately 6%. Thus, an intervention in a small percentage of the city’s street network could considerably reduce pedestrian travel times. The proposed methodology is a useful tool for urban and transport planners to improve pedestrian mobility and manage motorised traffic.
Towards the Introduction of Sustainable Fishery Products: The Bid of a Major Italian Retailer
Authors: Bonanomi Sara , Colombelli Alessandro , Malvarosa Loretta , Cozzolino Maria , Sala Antonello
Published: March 2017

Intense fishing pressure has been depleting marine resources worldwide. At a time when almost a third of world stocks are overexploited, the demand for fish and seafood is growing both due to the increasing world population and to rising per capita consumption. Over the past few decades, the demand for fish products has in turn grown considerably in Italy, although concern about sustainable fisheries here is not perceived as keenly as in Northern European countries, where certified fish and seafood products coming from sustainable fisheries are widely available. In this study, 248 fish and seafood products sold by a major Italian retailer were evaluated in terms of geographic origin, gear used, species conservation status, and stock status to gain information in view of the introduction of sustainable fishery products in Italy’s outlets. A literature review illustrated that most species came from some of the most intensely exploited fishing grounds in the world, where they are usually caught by trawls. The results highlighted the importance of supplying seafood products coming from sustainable sources and fisheries through the adoption of eco-labels and certification schemes. Finally, the present study stresses the urgency to promote more responsible fish and seafood consumption in Italy.
Simultaneous Determination of Multi-Mycotoxins in Cereal Grains Collected from South Korea by LC/MS/MS
Authors: Kim Dong-Ho , Hong Sung-Yong , Kang Jea , Cho Sung , Lee Kyu , An Tae , Lee Chan , Chung Soo
Published: March 2017

An improved analytical method compared with conventional ones was developed for simultaneous determination of 13 mycotoxins (deoxynivalenol, nivalenol, 3-acetylnivalenol, aflatoxin B1, aflatoxin B2, aflatoxin G1, aflatoxin G2, fumonisin B1, fumonisin B2, T-2, HT-2, zearalenone, and ochratoxin A) in cereal grains by liquid chromatography-tandem mass spectrometry (LC/MS/MS) after a single immunoaffinity column clean-up. The method showed a good linearity, sensitivity, specificity, and accuracy in mycotoxin determination by LC/MS/MS. The levels of 13 mycotoxins in 5 types of commercial grains (brown rice, maize, millet, sorghum, and mixed cereal) from South Korea were determined in a total of 507 cereal grains. Mycotoxins produced from Fusarium sp. (fumonisins, deoxynivalenol, nivalenol, and zearalenone) were more frequently (more than 5%) and concurrently detected in all cereal grains along with higher mean levels (4.3–161.0 ng/g) in positive samples than other toxins such as aflatoxins and ochratoxin A (less than 9% and below 5.2 ng/g in positive samples) from other fungal species.
Internet of Things-Based Arduino Intelligent Monitoring and Cluster Analysis of Seasonal Variation in Physicochemical Parameters of Jungnangcheon, an Urban Stream
Authors: Jo Byungwan , Baloch Zafar
Published: March 2017

In the present case study, the use of an advanced, efficient and low-cost technique for monitoring an urban stream was reported. Physicochemical parameters (PcPs) of Jungnangcheon stream (Seoul, South Korea) were assessed using an Internet of Things (IoT) platform. Temperature, dissolved oxygen (DO), and pH parameters were monitored for the three summer months and the first fall month at a fixed location. Analysis was performed using clustering techniques (CTs), such as K-means clustering, agglomerative hierarchical clustering (AHC), and density-based spatial clustering of applications with noise (DBSCAN). An IoT-based Arduino sensor module (ASM) network with a 99.99% efficient communication platform was developed to allow collection of stream data with user-friendly software and hardware and facilitated data analysis by interested individuals using their smartphones. Clustering was used to formulate relationships among physicochemical parameters. K-means clustering was used to identify natural clusters using the silhouette coefficient based on cluster compactness and looseness. AHC grouped all data into two clusters as well as temperature, DO and pH into four, eight, and four clusters, respectively. DBSCAN analysis was also performed to evaluate yearly variations in physicochemical parameters. Noise points (NOISE) of temperature in 2016 were border points (ƥ), whereas in 2014 and 2015 they remained core points (ɋ), indicating a trend toward increasing stream temperature. We found the stream parameters were within the permissible limits set by the Water Quality Standards for River Water, South Korea.
Nectar properties and the role of sunbirds as pollinators of the golden‐flowered tea (Camellia petelotii)
Authors: Sun Shi‐Guo , Huang Zhi‐Huan , Chen Zhi‐Bao , Huang Shuang‐Quan
Published: March 2017

PREMISE OF THE STUDY:

Properties of floral nectar have been used to predict if a plant species is pollinated by birds. To see whether winter‐flowering plants evolve nectar properties corresponding to bird pollinators, nectar properties of several Camellia species (including the golden‐flowered tea), as well as the role of floral visitors as effective pollinators, were examined.

METHODS:

Potential pollinators of Camellia petelotii were identified at different times of day and under various weather conditions. A bird exclusion experiment was used to compare the pollination effectiveness of birds and insects. Nectar sugar components (fructose, glucose, and sucrose) from C. petelotii growing wild and another seven Camellia species and 22 additional cultivars (all in cultivation) were examined by high‐performance liquid chromatography (HPLC).

KEY RESULTS:

The sunbird Aethopyga siparaja and honeybees were the most frequent floral visitors to C. petelotii. Honeybee visits were significantly reduced in cloudy/rainy weather. The fruit and seed set of flowers with birds excluded were reduced by 64%, indicating that bird pollination is significant. For the wild populations of C. petelotii, a bagged flower could secrete 157 μL nectar; this nectar has a low sugar concentration (19%) and is sucrose‐dominant (87%). The eight Camellia species and 22 cultivars had an average sugar concentration of around 30% and a sucrose concentration of 80%, demonstrating sucrose‐dominant nectar in Camellia species.

CONCLUSIONS:

The nectar sugar composition of Camellia species was characterized by sucrose dominance. In addition, the large reduction in seed set when birds are excluded in the golden‐flowered tea also supports the suggestion that these winter‐flowering plants may have evolved with birds as significant pollinators.
Unraveling the Mystery of Auditory Brainstem Response Corrections: The Need for Universal Standards
Authors: Norrix Linda W. , Velenovsky David
Published: March 2017

Background:The auditory brainstem response (ABR) is used to estimate behavioral hearing thresholds in infants and difficult-to-test populations. Differences between the toneburst ABR and behavioral thresholds exist making the correspondence between the two measures less than
perfect. Some authors have suggested that corrections be applied to ABR thresholds to account for these differences. However, because there is no agreed upon universal standard, confusion regarding the use of corrections exists.Purpose:The primary purpose of this article is to review
the reasoning behind and use of corrections when the toneburst ABR is employed to estimate behavioral hearing thresholds. We also discuss other considerations that all audiologists should be aware of when obtaining and reporting ABR test results.Results:A review of the purpose and use
of corrections reveals no consensus as to whether they should be applied or which should be used. Additionally, when ABR results are adjusted, there is no agreement as to whether additional corrections for hearing loss or the age of the client are necessary. This lack of consensus can be confusing
for all individuals working with hearing-impaired children and their families.Conclusions:Toneburst ABR thresholds do not perfectly align with behavioral hearing thresholds. Universal protocols for the use of corrections are needed. Additionally, evidence-based procedures must be employed
to obtain valid ABRs that will accurately estimate hearing thresholds.
Performance of 3 Enthesitis Indices in Patients with Peripheral Spondyloarthritis During Treatment with Adalimumab
Authors: Mease Philip J. , Van den Bosch Filip , Sieper Joachim , Xia Yinglin , Pangan Aileen L. , Song In-Ho
Published: March 2017

Objective.

To evaluate the validity of enthesitis indices in patients with peripheral spondyloarthritis (pSpA).

Methods.

The ABILITY-2 study evaluated the efficacy of adalimumab (ADA) versus placebo (PBO) in patients with active pSpA over 12 weeks. Patients received open-label ADA for an additional 144 weeks. Twenty-nine enthesitis sites used in 3 enthesitis scoring systems [Leeds Enthesitis Index (LEI), Spondyloarthritis Research Consortium of Canada (SPARCC) Enthesitis Index, Maastricht Ankylosing Spondylitis Enthesitis Score (MASES)] were assessed; discriminatory capacity and treatment response at Week 12 were calculated by standardized mean difference (SMD) and Guyatt’s effect size (ES). Sites showing resolution or new-onset enthesitis from baseline to Week 12 were analyzed.

Results.

Overall, 165 patients (ADA, n = 84; PBO, n = 81) were randomized; 143 had ≥ 1 enthesitis site at baseline. The LEI (SMD −0.73, ES −1.07) and SPARCC (SMD −0.56, ES −0.99) enthesitis indices showed higher discriminatory ability and treatment response than MASES (SMD −0.32, ES −0.81). At Week 12, among sites that were positive at baseline, significantly more (p < 0.05) showed resolution among patients treated with ADA versus PBO in the Achilles tendon (60.4% and 36.5%, respectively), medial epicondyle (73.2%, 48.7%), lateral epicondyle (80.6%, 52.8%), and iliac crest (73.5%, 47.2%). Among negative sites at baseline, significantly less (p < 0.05) new-onset enthesitis was observed with ADA versus PBO for Achilles tendon (3.6% and 10.9%, respectively), greater trochanter (3.4%, 14.4%), lateral epicondyle humerus (4.7%, 15.1%), medial femoral condyle (1.6%, 9.2%), and quadriceps insertion superior patella (1.5%, 7.0%).

Conclusion.

The LEI and SPARCC enthesitis indices showed better discriminatory capacity and treatment response in patients with pSpA versus MASES, likely because these indices contain more peripheral sites. Trial registration number: ClinicalTrials.govNCT01064856.
Effect of electrolyte supplementation on electrolyte profile in Marwari horses during 20 km moderate intensity riding exercise
Authors: Dedar R.K. , Kumar V. , Bala P.A. , Singh J. , Pal Y. , Legha R.A. , Gupta A.K.
Published: March 2017

The effect of electrolyte supplementation on plasma electrolyte profile in horses in hot environmental conditions was studied using sweat loss and sweat electrolyte concentration. Eleven adult Marwari mares were selected for the study. To develop an electrolyte supplement, 7 mares were given a preliminary 20 km moderate intensity exercise and the electrolyte supplement was designed on basis of their body weight loss and sweat electrolyte concentration during exercise. In the subsequent trials, 4 mares were kept in an exercise control group that did not receive the supplement (ECG), while 3 mares were kept in the exercise supplementation group (ESG) that received the supplement. Four other mares were used as resting controls (RG). ESG mares were daily fed 50 g electrolyte supplement and 150 g supplement orally 1 h before the 20 km trial. Mares of ESG and ECG groups were conferred 3 km trot + canter riding every day in the morning and a 20 km trot + canter ride on every 10th day of the total trial period of 40 days. Blood analysis revealed a significant (P<0.05) decline in plasma calcium and chloride concentrations immediately after exercise in both groups. There was significant less post-exercise decrease of plasma calcium and chloride concentration in ESG mares. Post-exercise plasma sodium concentration was higher (P<0.05) and plasma potassium concentration was lower only in ESG mares (P<0.05) compared to pre-exercise concentrations. The supplement did not affect the physiological responses (heart rate and rectal temperature). However, the changes in plasma sodium, potassium, calcium and chloride concentration were in favour of better performance in supplemented (ESG) mares and advocate sweat-developed electrolyte supplementation in riding mares.
A sphere fitting approach to determine the hip joint centre of the horse
Authors: Valentin S. , Peham C. , Zsoldos R.R. , Licka T.F.
Published: March 2017

Accurate identification of the hip joint centre (HJC) is crucial for the correct estimation of knee and hip joint loads and kinematics, which is particularly relevant in orthopaedic surgery and musculoskeletal modelling. Several methods have been described for calculation of the HJC in humans, however, no studies have used these methods in the horse despite a similar need for improved evaluation of hip joint biomechanics in rehabilitation and musculoskeletal modelling. This preliminary study uses the commonly used functional method (least-squares sphere fit) to determine the HJC in three equid cadavers. Bone pins with reflective markers attached were drilled into the tuber coxae (TC), tuber ischium (TI), tuber sacrale (TS), greater trochanter (GT), third trochanter (TT) and lateral femoral condyle (FC) of the uppermost limb of the cadavers positioned in lateral recumbency. Three repetitions of passive movements consisting of pro-and retraction, ab- and adduction and circumduction were performed. The HJC was calculated using a least-squares sphere fitting method and presented as a distance from the TC based on a percentage of the TC to TI vector magnitude. Mean (± standard deviation) of the HJC is located 52.4% (± 3.9) caudally, 0.2% (± 6.5) dorsally, and 19.8% (± 4.2) medially from the TC. This study is the first to quantify the HJC in horses ex vivo using a functional method. Further work (in vivo and imaging) is required to validate the findings of the present study.
A teaching proposal for the study of Eigenvectors and Eigenvalues
Authors: Beltrán Meneu María José , Murillo Arcila Marina , Jordá Mora Enrique
Published: March 2017

In this work, we present a teaching proposal which emphasizes on visualization and physical applications in the study of eigenvectors and eigenvalues. These concepts are introduced using the notion of the moment of inertia of a rigid body and the GeoGebra software. The proposal was motivated after observing students’ difficulties when treating eigenvectors and eigenvalues from a geometric point of view. It was designed following a particular sequence of activities with the schema: exploration, introduction of concepts, structuring of knowledge and application, and considering the three worlds of mathematical thinking provided by Tall: embodied, symbolic and formal.
Converging Technologies for the IoT
Authors: Milovanović Dragorad , Pantović Vladan , Gardašević Gordana
Published: March 2017

The Internet of Things (IoT) is the concept of linking various objects to the Internet that sense/acquire and transmit data in the environment to create a new application. From a standardization perspective, the IoT can be viewed as a global infrastructure, enabling advanced services by interconnecting (physical and virtual) objects based on evolving interoperable information and communication technologies (ICT). The success of the IoT will depend strongly on the existence and effective operation of global standards. The standardization initiative, research projects, national initiatives and industrial activities are outlined in this chapter. There are already many standardization activities related to the IoT, covering broad research areas: wireless and cellular technologies, networking protocols, emerging applications, media-centric IoT. What is needed, therefore, are a harmonization of standards and effective frameworks for large-scale deployment.
A Case Study on the Spatial Cognition of Surrounding Objects by the B&VI People Using Sound Patterns and Ultrasonic Sensing
Authors: Zubov Dmytro
Published: March 2017

In this paper, two assistive projects on the spatial cognition by blind and visually impaired (B&VI) people are presented using the sound patterns and ultrasonic sensing. The first device supports the sport activities of B&VI, the golf game specifically. Every golf flagstick has the sound marking device with the active buzzer and WiFi remote control by the person with good vision. The NodeMcu Lua ESP8266 ESP-12 WiFi boards in devices are controlled by the cross-platform HTML web-sites, and hence any WiFi smartphone and / or computer can be in use to start the HTML web-page. Mini portable WiFi router links all devices in the network. End-users are securely connected using the password to wireless router. Ten assistive devices were handed in Instituto para Ciegos y Débiles Visuales “Ezequiel Hernández Romo” together with WiFi router. The second device supports the orientation of B&VI by measuring the distance to the obstacle based on the ultrasonic sensor HC-SR04 and Arduino Uno. The distance is pronounced to the B&VI using headphone and MP3 player with SD card. Nowadays, Universidad Politécnica de San Luis Potosí is negotiating with several organizations to create a production line. All devices are of the budget price up to USD 10. All devices were tested successfully. This is joint work of Instituto para Ciegos y Débiles Visuales “Ezequiel Hernández Romo”, Universidad Politécnica de San Luis Potosí, and Tecnológico de Monterrey with ongoing project “Artificial Eyes” based on Raspberry Pi 3 Model B board with an ultrasonic sensor and camera for the image and/or video processing of the surrounding environment, as well as the friendly integration into the local networks using onboard WiFi and Bluetooth.
Macro- and Meso-Morphology of Flemish Cap, Flemish Pass, and the northeastern Grand Banks of Newfoundland
Authors: Monahan D , Macnab R F
Published: March 2017

Hydrographic surveys of the Grand Banks of Newfoundtand and the Flemish Cap- Flemish Pass region have been carried out on a systematic basis for the past several years. An analysis of the echo-sounding records has yielded an accurate description of the large- and
medium- scale features of the sea floor in this region. The results of this investigation are summarized in two colour maps , one showing detailed bathymetry, the other portraying the distribution of six well- identified bottom categories according to morphological type. The locations of several
types of individual medium-sized features are shown on the latter map as well .
Paleomagnetic data from the canadian appalachian region and their significance relative to north american polar wandering
Authors: Black R F
Published: March 2017

Data has been obtained from rocks of Cambrian to Triassic age from the Canadian Appalachian Region. While Carboniferous pole
positions agree well within the region and with others for North America, pole positions for Cambrian and Devonian rocks from the western part of the Island of Newfoundland are consistently different from those determined for rocks of similar age from the mainland of Eastern Canada . To effect
coincidence of Devonian and Cambrian pole positions it is suggested that a 30 degree counterclockwise rotation of the Island of Newfoundland occurred between middle and upper Devonian time. This is the approximate angle that exists between the northern shore of the Gulf of St . Lawrence and the
northwest shoreline of the Island of Newfoundland . The geology and tectonics can be interpreted to favour such a rotation as the divergence in the structural trends of belts of early to middle Palaeozoic rocks is reduced. The results of this study combined with other North America pole positions
are used to suggest alternative polar wandering curves for North America.
Biostratigraphy and depositional history of Amoco Imp Skelly B-1 Egret K-36 Grand Banks, Newfoundland
Authors: Gradstein F M , Jenkins W A M , Williams G L
Published: March 2017

Dinoflagellates, foraminifers, ostracods and spores in the Amoco Imp Skelly B-1 Egret K-36 well, Grand Banks, Newfoundland indicate the presence of over 10,000 feet of Upper Jurassic through Miocene rocks. Cenomanian and upper Maastrichtian to lower Eocene strata
appear to be missing. The depositional environment was mostly shallow marine. Kimmeridgian beds are brackish in part, and in Turonian time bathyal conditions may have occurred, becoming rapidly shallower during Senonian time. Sedimentation rates in Late Jurassic time exceeded 5 cm/1000 y, but after
that varied from less than 0.5 to 2.8 cm/1000 y. The Late Jurassic-Early Cretaceous foraminiferal fauna with prolific Pseudocyclammina jaccardi and also Anchispirocyclina lusitanica and Choffatella decipiens, and the rich Turonian plankton fauna is of Tethyan affinity. This is the northernmost
occurrence to date of these Jurassic-Early Cretaceous species on the North American continent. An appendix lists selected shelly and organic-walled microfossils for each stratigraphic interval.
An input survey in the Project Pioneer area, Manitoba
Authors: Dyck A V , Becker A , Collett L S
Published: March 2017

The airborne time-domain system INPUT, is being assessed by the Geological Survey of Canada as a possible technique to aid in geological mapping. Five small test areas of the Precambrian Shield were surveyed as part of the Project Pioneer study in the Province of
Manitoba. These survey areas lie mainly in the Rice Lake greenstone belt and extend northward into the Wanipigow River plutonic complex. The rocks of the Rice Lake belt are known to consist of acidic to intermediate volcanics and intrusive features such as the Ross River pluton. Major east-west
faults on the boundaries indicate that the Rice lake belt is a down-faulted graben structure with apparent 10-mile lateral displacements on either side. A discontinuous series of highly serpentinized ultramafic lenses occurs along the north flank of the belt. The experimental 10-channel INPUT system
was operated in the minimum coupled configuration at an aititude of 450 feet. Several distinct anomaly types were encountered. The recognition and interpretation of anomaly types was assisted by scale model experiments with vertical and horizontal conductors of limited extent and by theoretical
calculations of the response of conductive
overburden. The minimum-coupled configuration produces distinctive S-shaped anomalies then flown over thin vertical conductors. Many of the slowly decaying anomalies can be correlated with known structural features such as mineralized and graphitic shear zones and lenses of highly serpentinized
ultramafic rocks. Those extensive high amplitude anomalies which correspond to lakes are attributed to conductive lake-bottom sediments. In these cases the anomalies yield an estimate of the thickness-conductivity product of the conducting layer as well as providing helpful clues to the recognition
of other overburden anomalies. These results suggest that INPUT surveys can be helpful in the delination of structural features and in the mapping of overburden during the normal course of exploration.
Data storage and retrieval using geodatabase with Application of Geophysical Data in Marsden square 151
Authors: Shih K G
Published: March 2017

Data collected from six cruises have been entered into GEODATABASE. The available data cover Marsden Squares (MSQ) 114, 115, 149, 150, 151, 186 , and 187. Six-minute grid mean values of free air and magnetic anomalies in MSQ 151 are given in this report. The
results are based on 96 ,000 data stat ions in MSQ 151. Although it is not the final data report of the six- minute grid mean values in MSQ 151, it may be valuable to interested parties as basic data, and to others as an example of what can be done from the available files.
Report on Rumpel Lake stratigraphic test, Saskatchewan
Authors: Lerand M M ,   Gulf Mnrls C
Published: March 2017

The Athabasca Formation of middle Proterozoic age is an unmetamorphosed, cross-bedded, pure quartz sandstone occupying an oval, 38,000 square mile basin, more than 5,000 feet deep, in northern Saskatchewan. In 1968 Gulf Minerals continuously cored 4,776 feet of
the Athabasca Formation and 340 feet of underlying basement near the basin centre, at Rumpel Lake, where the formation consists of two members. The Upper Member , 1,408 feet thick, is a well stratified , predominantly medium-grained, largely clay-cemented, purple, maroon and white, pure quartz
sandstone containing less than 5% shale-siltstone. Cross-bedding and a strong textural lamination are characteristic. All clays are composed of illite and chlorite. Glauconite, altered to illite, and detrital green mica, as well as tourmaline, are the main accessories. The member was probably
deposited in beach, barrier, lagoon and near- shore marine environments. The Lower Member, 3,368 feet thick, is a massive, pink and purple banded, cross-bedded, pure quartz sandstone with 24-foot thick basal conglomeratic zone. It possesses a strong textural lamination, is poorly sorted, has poor
porosity and is very hard. The average grain size increases from medium-coarse at the top to very coarse at the base. Granules and small pebbles increase in quantity with depth. The sand is cemented with quartz, and clay composed of illite and kaolinite. Intraformational clay pebbles are common, and
heavy minerals include tourmaline with zircon and magnetite at the base. The member was deposited in a fluviatile environment. The upper contact may represent a brief hiatus, and the lower contact is a major unconformity. Underlying the Athabasca at Rumpel Lake is a six-foot thick, red -maroon, clay
regolith that represents the intense, in situ, chemical weathered zone at the top of the granitic basement complex. Locally the Athabasca is overlain, probably conformably, by the Carswell dolomite, and below, but nowhere in mutual contact is the thick, arkosic Martin redbed
succession.
A preliminary analysis of the gravity anomaly field in the Timmins-Senneterre mining areas
Authors: Gibb R A , van Boeckel J J G M , Hornal R W
Published: March 2017

The results of gravity surveys made by the Dominion Observatory, during the period 1946 to 1963, in the Timmins-Senneterre mining area of Ontario and Quebec are presented as a Bouguer anomaly map (scale: 1: 500, 000). The area is studded with many granite
batholiths of variable composition which are outlined by intense negative gravity anomalies . The whole region is regarded as one great roof pendant and on the assumption that the volcanic and sedimentary rocks of the area are everywhere floored by granite , it is possible to estimate the
thicknesses of the volcanic belts using the gravity results; however, the depths to which the granite extends cannot be determined by the gravity method alone. A preliminary interpretation using two- and three-dimensional models to simulate major geological bodies indicates that many of the dense
volcanic belts in the area extend to depths of from 3 to 5 km.
Figure 1. Geological map of the manicouagan resurgetn caldera, Quebec
Authors: Currie K L
Published: March 2017

The Manicouagan resurgent caldera is an octagonal depression 38 miles across, with a mountain of Precambrian rocks about 4 miles north of the centre. The moat between the mountain and the walls of the depression is partly filled with volcanic rocks of the
Triassic Manicouagan complex. These rocks are composed of va rying fractions of alkali olivine basalt mixed with country rocks. The Precambrian rocks beneath the Manicouagan complex, comprising Archean gabbro, anorthosite, mangerite, and charnockite, overlain by Proterozoic quartzfeldspar gneisses
containing quartzite- marble- iron-formation pods, have been erratically shock metamorphosed to assemblages containing one or more of the following features: vesicular glass, deformation lamellae, maskelynite, optically anomalous minerals, hornfelsic texture, and metasomatic alteration. Field and
experimental evidence suggest that metamorphism occurred under conditions of very high temperature, moderate pressure, and extremely rapid oscillation of both temperature and pressure. These conditions are deduced to be connected with a hydrogen-rich character of the parent magma. Structural
analysis of the area reveals that a long history of Precambrian deformation preceded formation of the Manicouagan structure. Development of this structure began with strong upwarping in the areas now occupied by Manicouagan and Mouchalagane lakes. Development continued with radial volcanic blasts
followed by subsidence along pre-existing zones of weakness. Doreitic magma was poured out into the depression , and the central mountain rose on the back of intrusions at depth. The structural pattern of the igneous rock sheets agrees with geophysical evidence by indicating that Precambrian rocks
beneath the Triassic igneous rocks are essentially unbrecciated. Hypotheses supposing the Manicouagan structure to result from or to be initiated by extraterrestrial impact, are considered and rejected as contrary to field evidence. The geometric form and history of development of the Manicouagan
structure are similar to those of resurgent calderas. The structure is concluded to be an unusual variety of resurgent ca ldera.
Palynostratigraphy, Imperial Adgo F-28
Authors: Norris G
Published: March 2017

The biostratigraphy on Imperial Adgo F-28 consists of palynostratigraphy and zonation by Dr. Geoffrey Norris and a micropaleontological analysis by Dr. W. Braun. One hundred and six micropaleontological slides and 77 micropaleontological preparations from well
cuttings provided by the Geological Survey of Canada were examined in detail. Samples were meagre in quantity from 50-5,000 feet and absent in the intervals 1200-1250 and 9300-9400 feet. No conventional cores were taken on the well. A continuous zonation based on microflora was established from
10,528 feet (total depth) to near surface. Eight recognizable zones extend from Middle Eocene-Older Paleogene to Neogene. The micropaleontological investigation provides three assemblages . Assemblage I and Assemblage II (surface to 2800 feet) are mainly Neogene and possibly Oligocene in age. The
Haplophragmoides 67 assemblage from 8200 to 9200 feet contained in a restricted marine section, is dated Paleogene. The remainder of the Well was barren of diagnostic microfossils due to the presence of a dominantly continental terrestrial deltaic sequence.
A finite difference program to solve the transient heat conduction equation involving latent heat in cylindrical symmetry
Authors: Taylor A
Published: March 2017

A numerical model has been developed to simulate the transient thermal regime arising from a cylindrically symmetric disturbance in a semi-infinite medium. Heat transfer by radial conduction only is considered and provision is made for a phase change involving
latent heat to occur within the medium. The numerical solution to the transient heat conduction equation using the explicit finite difference method is outlined in detail. Some aspects of the computer solution are described. The program has been used to produce a set of tables giving both
temperatures at various distances from the source for a range of dimensionless times and the radial heat flow leaving the source region. Data are tabulated for cases with and without a phase change; in the case of a phase change, 3 tables are given for latent heat densities of 10 and 100 MJ/m and
several source and initial temperatures. This is an extended data set, complementing that in Taylor (1978). In both cases, the source disturbance· is considered to be either sustained indefinitely or to last for a finite period, after which cooling occurs. The program finds application in such
geophysical problems as the study of the disturbance to the geothermal regime resulting from the drilling of and production from petroleum wells, from buried pipelines and power cables and from underground tunnels. Using the tables gives an "off-the-shelf" solution to the transient thermal regime in
many of these applications. As an example, the program is used to calculate theoretical temperature profiles for a Mackenzie Delta well and to point out the thermal advantage of using an insulating annulus through the permafrost.
Temperature observations during drilling of two 400M wells in the Coryell Intrusives north of Grand Forks, British Columbia, 1978
Authors: Lewis T J , Taylor A E , Allen V S , Jessop A M
Published: March 2017

Two 450-m cored boreholes were drilled in the Coryell Intrusive rocks 60 km north of Grand Forks, B.C. Since water flowed from the rock into these holes, as expected, the undisturbed temperatures of the rock were determined by measuring the bottom hole
temperatures before the start of each day's drilling. The measured thermal gradients in the two holes are 55 and 54 mKm -1 . This indicates a high heat flow of approximately 135 mWm -2 The undisturbed temperatures of the second hole indicated that water was flowing through the rock before the hole
was drilled. Measurements of thermal conductivity and heat generation, corrections for terrain and logging of the core are to be done.
Report on 1978 field work - Meager Creek geothermal area, upper Lillooet River, British Columbia
Authors: Fairbank B , Shore G A , Werner L J , Nevin A E , Sadlier-Brown T
L
Published: March 2017

encouraging new subsurface information. Two wells were drilled and both recorded temperatures in excess of l00°c. One of these confirmed a new target area. Geophysical surveys refined earlier concepts of the boundaries of the three areas of interest and
allowed a division into:
a. the South Reservoir
b. the North Reservoir
c. the Lillooet Valley resistivity anomaly. ·
The South Reservoir is the best-defined. It has been under specific study since 1974. Seven diamond drill holes have been put down within or near its boundaries. Exploratory work on the North Reservoir and the Lillooet Valley resistivity anomaly is not as advanced as that on the South
Reservoir.
An investigation into the use of time domain reflectometry to determine the unfrozen water content of freezing soils
Authors: Smith M W , Patterson D
Published: March 2017

This report provides an introduction to the use of electromagnetic methods (Time Domain Reflectometry) for measuring the unfrozen water content (8 f) of freezing soils. The limitation of the presently used methods arg introduced along with the reasons why Time
Domain Reflectometry is a viable alternative. Background information on Reflectometry principles are presented as are considerations for designing a system for measurement of the unfrozen water content in the lab or field.
The acoustic properties of methane hydrate by Brillouin Spectroscopy : a preliminary report
Authors: Clouter M J , Kiefte H
Published: March 2017

Under certain conditions of pressure and temperature hydrocarbon gases combine with water to form an ice-like solid, methane hydrate. Such conditions are encountered in the permafrost areas of Canada and beneath the offshore waters surrounding us. Very little
information on the physical properties of hydrates is currently available although such data is needed to evaluate and assess natural hydrate deposits. This preliminary report describes the formation of methane hydrate in the laboratory and the experimental equipment to be used in determining the
accoustic properties of single crystals of hydrate.
A three-component aeromagnetic survey of the Canadian Arctic
Authors: Haines G V , Hannaford W
Published: March 2017

A three-component airborne magnetic survey of the Canadian Arctic was carried out in late 1970, at an average altitude of 3. 7 km, The survey data are in the form of averages over 30 seconds of tirne, or approximately 3.5 km of flight track. The international
Geomagnetic Reference Field (IGRF) was removed from these data, and the resulting residuals plotted as profiles. A 3rd-degree polynomial was fitted to the survey data by least-squares to determine how well the IGRF represents the average regional field over the area. The polynomial was also used to
obtain vector residuals.
Canadian Seismograph Operations 1975
Authors:   Earth Physics Branch
Published: March 2017

During 1975 the Division of Seismology and Geothermal Studies, of the Earth Physics Branch, Department of Energy, Mines and Resources operated or contracted the operation of 21 standard seismograph stations, 12 regional stations, 2 telemetered networks based at
Ottawa and Victoria, a medium aperture array at Yellowknife, a strong-motion seismograph network on the West Coast and several special or temporary seismographs. This report gives the characteristics of the various systems and describes the format and availability of the recorded
data.
Canadian Geothermal Data Collection - northern wells 1955 To February 1974
Authors: Taylor A E , Judge A S
Published: March 2017

Subsurface temperatures are necessary to salve many problems which occur in resource development particularly in northern regions. This volume collects together all such information available within the public domain for hales greater than 125 m in depth. An
introductory section discusses data acquisition and accuracy, the disturbance to thermal equilibrium by drilling and the determination of equilibrium permafrost thickness. A table and figure give the values of permafrost thickness determined from the presented data.
Canadian Geothermal Data Collection - northern wells 1974
Authors: Taylor A E , Judge A S
Published: March 2017

The assessment and solution of many problems which may occur in the development of northern regions require a knowledge of subsurface temperatures. This volume supplements the first in this series, and reports new measurements at 25 of the sites listed in the
first volume and observations from nine new sites. A total of 59 determinations of permafrost thickness have been reported in the collection to date . Determined thicknesses in the Arctic Islands range from 140 m to 675 m, in the Mackenzie Delta from 50 m to 700 m and in the remainder of the
Northern Mainland from 0 m to in excess of 500 m.
Canadian Geothermal Data Collection - northern wells 1975
Authors: Taylor A E , Judge A S
Published: March 2017

The assessment and solution of many problems which may occur in the development of northern regions require a knowledge of subsurface temperatures, This volume supplements two earlier volumes in this series, and it reports new measurements at 22 of the sites
listed in the previous volumes and observations from 19 new sites, A total of 78 determinations of permafrost thickness have been reported in the collection to date. Determined thicknesses in the Arctic Islands range from 140 m to 720 m, in the Mackenzie Delta from 0 m to 700 m and in the remainder
of the Northern Mainland from 0 m to in excess of 700 m.
Canadian Earthquakes - 1972
Authors: Basham P W , Horner R B , Leblanc G , Stevens A E , Wetmiller R J
Published: March 2017

This catalogue lists 974 earthouakes in Canada and adjacent areas detected by the Canadian seismograph network in 1972. A total of 268 ·earthquakes were located, 216 in Canada and 52 in the adjacent areas of the United States and Greenland. Forty-four
earthquakes in Canada had a magnitude of 4 or greater. The largest earthquake in Canada in 1972 occurred on 23 July 19h west of Vancouver Island with magnituèe ffib 5.8, MS 6.4. An additional 706 small shocks are described only by magnitude and by distance from the nearest seismograph station.
Most earthquakes in 1972 occurred in the northern Yukon, in the Queen Elizabeth Islands and west of Vancouver Island. A minor earthquake was located in southern Saskatchewan where few previous earthquakes are known. Sixteen earthouakes plus one rockburst were reported felt in Canada in 1972,
including two in the Arctic Islands. The most strongly felt earthquake occurred on 5 July lOh just off the west coast of Vancouver Island and was felt with intensity V in several coastal communities. The text is accompanied by four epicentre maps and isoseismal maps for three of the felt
earthquakes. In addition, the located earthquakes are listed chronologically by region in four tables; the unlocated events are listed chronologically by recording station in 15 tables. One table summarizes the reports of earthquakes felt in Canada in 1972.
Canadian Geothermal Data Collection - northern wells 1977-78
Authors: Judge A S , Taylor A E , Burgess M
Published: March 2017

The assessment and solution of many problems which may occur in the developrnent of northern regions require a knowledge of subsurface temperatures. This volume supplements four earlier vo lumes in this series, and it reports new measurements at 30 of the sites
listed in the previous volumes and observations from 11 new sites. A total of 98 determinations of permafrost th ickness have been reported in the collection to date. Det ermined thicknesses in the Arctic Islands range from 144 m to 726 m, in the Mackenz i e Delta from 0 m to 670 m and in the
remainder of the Northern Mainland from 0 m to more than 500 m.