摘要:
A method for controlling Aurelia spp. blooms in harbors includes: designing different sites at equal intervals in an area in spring, collecting ephyrae of Aurelia spp. with an I-type trawl net for zooplankton from bottom to surface, determining whether polyps of Aurelia spp. inhabit in the vicinity of the sites; seeking large floating substrates that the polyps attach to using scuba diving in the determined habitats of the polyps; dragging the substrates to a shore base and scraping off all organisms attached to bottom surfaces of the substrates in a physical manner, then air drying the substrates for 7 days or more; and applying an antifouling paint on the bottom surfaces of the dried substrates followed by drying, then returning the substrates back to their original sites in the sea to control the bloom of Aurelia spp. in the area.
摘要:
A device for measuring a reflectivity of an object at the seabottom, includes a spectral probe, a first white board, a second white board, a distance meter, and a shaft; the first white board and the second white board respectively have a known reflectivity; the first white board and the second white board are connected to the shaft, wherein the first white board and the second white board are spaced along an axial direction of the shaft and staggered from each other along a radial direction of the shaft; the spectral probe is configured to collect spectral data of the first white board, the second white board and the object at the seabottom; the distance meter is configured to collect distance data between the spectral probe and the object at the seabottom.
摘要:
The invention discloses marine Streptomyces sp., a Pyranosesquiterpene compound, as well as a preparation method and uses thereof. Streptomyces sp. SCSIO 01689 was collected in China Center for Type Culture Collection (CCTCC) (Address: Wuhan University, Wuhan City, China) with the collection number of CCTCC NO: M 2011257 on Jul. 18, 2011. The Streptomyces sp. SCSIO 01689 can produce the Pyranosesquiterpene compound with better anti-Escherichia coli activity and anti-Artemia activity, as well as Cyclo(D)-Pro-(D)-Ile, Cyclo(D)-Pro-(D)-Leu and Cyclo(D)-trans-4-OH-Pro-(D)-Phe with better anti-Vibrio anguillarum activity and anti-Artemia activity, thereby providing a new way for preparing the Cyclo(D)-Pro-(D)-Ile, the Cyclo(D)-Pro-(D)-Leu and the Cyclo(D)-trans-4-OH-Pro-(D)-Phe. The Pyranosesquiterpene compound can be used for preparing anti-Escherichia coli medicaments and anti-Artemia medicaments, as well as preparing condiments as a condiment precursor compound.
摘要:
A self-cleaning and anti-adhesion apparatus for marine instruments includes an installation frame. A first end of the installation frame is fixed with an installation base, and a second end of the installation frame is movable with a screw rod. The upper end of the installation base is movable with a first rotation base. A wire netting ball used for holding a sensor is installed above the first rotation base. The wire netting ball is fixedly connected with the installation base. The top end of the screw rod is fixedly connected with a first end of the flexible connector, and a second end of the flexible connector is fixedly connected with a floating bladder. The screw rod is screwed with an inner wheel of an internal meshing ratchet mechanism, and an outer wheel of the internal meshing ratchet mechanism is fixed inside the mounting ring.
摘要:
The disclosure provides a subspace-based blind identification algorithm of an ocean underwater acoustic channel for multi-channel fir filter, which adopts a technical solution that a channel impulse response coefficient is calculated by quadratic minimization. The disclosure has beneficial effects that estimation precision can be met when using a proper number of samples, and especially when a few noise vectors are used for estimating channel parameters, so that calculation amount is greatly reduced.
摘要:
A space-bred seawater Spirulina H11 strain. The strain exhibits high growth rate, capacity of simultaneously accumulating high contents of phycocyanin, Spirulina polysaccharides and β-carotene, and excellent adaptability to outdoor environment, thus can be used to produce high-quality Spirulina powders, phycocyanin, Spirulina polysaccharides, and β-carotene-rich Spirulina oil.
摘要:
A system for determining the thermal properties of rocks under high pressure conditions in deep sea includes a first pressure vessel having a data collecting unit and a second pressure vessel having a chamber being filled with seawater, communicating with a drain valve, and having a rock sample disposed therein. First and second temperature sensors are respectively disposed in the center and on the surface of the rock sample. A third temperature sensor and a pressure sensor are disposed in the chamber. Outputs of the temperature sensors and the pressure sensor are communicated with inputs of the data collecting unit via watertight cables. Determining the thermal properties of rocks under high pressure conditions in deep sea includes rapidly opening the drain valve for instant loading of the rock sample and introducing an established finite element numerical inversion model. No heat source for electrical heating nor booster pump is needed.
摘要:
A pop-up monitoring base station for seafloor heat flow includes a recovery unit, a discarding unit and a cable chopping mechanism. The recovery unit includes a recovery support, internally accommodating two acoustic release devices provided with closable hooks on bottoms thereof and loaded with floating balls. The discarding unit includes a discarding support, below which a heat flow probe is fixedly connected. The recovery unit and the discarding unit are fixed together through a steel wire rope with two ends connected with the closable hooks at the bottoms of the acoustic release devices. A cable extends from the discarding unit through the cable chopping mechanism fixed on the bottom of the recovery support and connects with the floating balls. The cable can be chopped off and/or pulled out automatically to realize successful separation between the recovery unit and the discarding unit.
摘要:
The present invention relates to chemical total synthesis methods of six novel protein tyrosine phosphatase-1B (PTP1B) inhibitors and application of the inhibitors in the preparation of medicaments for treating type 2 diabetes mellitus (T2DM). The PTP1B inhibitors use one or more of the six compounds represented by the structural formulae 1, 2, 3, 4, 5 and 6, as active components. The compounds can enhance the sensitivity of an insulin receptor by inhibiting the activity of PTP1B, thereby having a favorable therapeutic effect on insulin-resistant T2DM.
摘要:
The invention relates to a novel kind of chitosan derivative, specifically to quaternized carboxymethyl chitosand derivatives and preparation method. Chitosan with different molecular weight reacts with chloroactic acid give rise to carboxymethyl chitosan. After reaction of Schiff based, deoxidized and quaternized, quaternized carboxymethyl chitosan is obtained. This kind of chitosan derivative have better water-solubility and better antifungal activity, which can used in the fields of medicine and agriculture.