摘要:
A method of manufacturing a heat exchanger core, including providing a plurality of flat tubes having a plurality of flow channels therein, forming at least a portion of each of said flat tubes to define an arcuate tube cross-section, piercing a first and a second header to produce a series of slotted openings therein, assembling the first and second headers to first and second ends, respectively, of the plurality of tubes, and placing the assembled tubes and headers into an elevated temperature environment to cause a braze alloy cladding on either the tubes or the headers or the tubes and the headers to flow and form brazed joints between the tubes and headers. Forming the portion of each of said flat tubes to define the arcuate tube cross-section includes forming an arc extending between an air inlet side and an air outlet side of the tube.
摘要:
Heat exchange inefficiencies found in round tube plate fin heat exchangers are eliminated in an aluminum heat exchanger that includes first and second headers (20), (22) and at least one flattened tube (24), (70) extending between the headers (20), (22). A plurality of generally parallel tube runs are defined and each has opposite edges. A plurality of plate fins (26), (50) are arranged in a stack and each has a plurality of open ended slots (34), one for each run of the tubes (24), (70). Each of the tube runs (24), (70) is nested within corresponding slots (26) and the fins (26), (50) with one of the edges (40) of the tube runs extending outwardly of the corresponding fin (26). The assembly is brazed together.
摘要:
Heat exchange inefficiencies found in round tube plate fin heat exchangers are eliminated in an aluminum heat exchanger that includes first and second headers (20), (22) and at least one flattened tube (24), (70) extending between the headers (20), (22). A plurality of generally parallel tube runs are defined and each has opposite edges. A plurality of plate fins (26), (50) are arranged in a stack and each has a plurality of open ended slots (34), one for each run of the tubes (24), (70). Each of the tube runs (24), (70) is nested within corresponding slots (26) and the fins (26), (50) with one of the edges (40) of the tube runs extending outwardly of the corresponding fin (34). The assembly is brazed together.
摘要:
Novel purine compounds of Formula 1, pharmaceutically acceptable prodrugs and salts thereof, and their use as fructose 1,6-bisphosphatase inhibitors.
摘要:
A portable clothes hanger rack is disclosed. A yoke has a hook at one end and a pair of pivotable arms mounted on the other end. The hook is used to suspend the device while the arms hold a plurality of hangers. The hangers are modified with a sphere replacing the conventional hanger hook. The arms have a removable end and the top, bottom and side wall form an enclosed elongated parallelpiped. The arm bottom wall has an elongated slot and the hangers extend down through the slot with the sphere retained inside the arm. The arms may be folded into a vertically parallel coextensive position for compact storage of the device in a suitcase.
摘要:
Prodrugs of formula I, their uses, their intermediates, and their method of manufacture are described: wherein: V, W, and W′ are independently selected from the group consisting of —H, alkyl, aralkyl, alicyclic, aryl, substituted aryl, heteroaryl, substituted heteroaryl, 1-alkenyl, and 1-alkynyl; or together V and Z are connected via an additional 3-5 atoms to form a cyclic group containing 5-7 atoms, optionally 1 heteroatom, substituted with hydroxy, acyloxy, alkoxycarbonyloxy, or aryloxycarbonyloxy attached to a carbon atom that is three atoms from both O groups attached to the phosphorus; or together V and Z are connected via an additional 3-5 atoms to form a cyclic group, optionally containing 1 heteroatom, that is fused to an aryl group at the beta and gamma position to the O attached to the phosphorus; together V and W are connected via an additional 3 carbon atoms to form an optionally substituted cyclic group containing 6 carbon atoms and substituted with one substituent selected from the group consisting of hydroxy, acyloxy, alkoxycarbonyloxy, alkylthiocarbonyloxy, and aryloxycarbonyloxy, attached to one of said carbon atoms that is three atoms from an O attached to the phosphorus; together Z and W are connected via an additional 3-5 atoms to form a cyclic group, optionally containing one heteroatom, and V must be aryl, substituted aryl, heteroaryl, or substituted heteroaryl; together W and W′ are connected via an additional 2-5 atoms to form a cyclic group, optionally containing 0-2 heteroatoms, and V must be aryl, substituted aryl, heteroaryl, or substituted heteroaryl; Z is selected from the group consisting of —CHR2OH, —CHR2OC(O)R3, —CHR2OC(S)R3, —CHR2OC(S)OR3, —CHR2OC(O)SR3, —CHR2OCO2R3, —OR2, —SR2, —CHR2N3, —CH2aryl, —CH(aryl)OH, —CH(CH═CR22)OH, —CH(C≡CR2)OH, —R2, —NR22, —OCOR3, —OCO2R3, —SCOR3, —SCO2R3, —NHCOR2, —NHCO2R3, —CH2NHaryl, —(CH2)p—OR12, and —(CH2)p—SR12; p is an integer 2 or 3; with the provisos that: a) V, Z, W, W′ are not all —H; and b) when Z is —R2, then at least one of V, W, and W′ is not —H, alkyl, aralkyl, or alicyclic; R2 is selected from the group consisting of R3 and —H; R3 is selected from the group consisting of alkyl, aryl, alicyclic, and aralkyl; R12 is selected from the group consisting of —H, and lower acyl; M is selected from the group that attached to PO32−, P2O63−, or P3O94− is a biologically active agent, and is attached to the phosphorus in formula I via a carbon, oxygen, sulfur or nitrogen atom; and pharmaceutically acceptable prodrugs and salts thereof.
摘要:
A clearinghouse receives medical-related financial data, including data describing payment claims for medical services from a provider and payment polices and explanations of benefits (EOBs) from a payer. The clearinghouse aggregates the data into logical units, such as family units. A translation module translates codes in the EOBs or other data into layperson descriptions. An end-user uses a client computer to download the aggregated medical-related financial data from the clearinghouse. An analytics module at the client computer analyzes the medical-related financial data to identify items of interest to the end-user, such as billing and payment errors, and available tax deductions. The end-user can input personal medical data and the analytics module will correlate the medical data with the medical services identified by the financial data.
摘要:
A method, apparatus, and article of manufacture for locating web pages from a network server. A count of retrievals of a web page is accumulated and the accumulated count and an address for the web page are stored in a record of a history log database at the network server. A multiple reference hotlist is formatted from the records in the history log database, wherein the multiple reference hotlist comprises a list of addresses for web pages retrieved from the records and the list is sorted by the accumulated counts retrieved from the records. The multiple reference hotlist is then displayed for a user.
摘要:
The energy required to provide hot water may be reduced in a water heating system including a heat generating range (12) for cooking food and a hood (14) overlying the range (12) for capturing fumes rising from the range (12) or the food thereon. An exhaust duct (16) provided with an exhaust fan (18) is connected to the hood (14) and a baffle and heat exchanger assembly (22) is interposed between the hood (14) and the exhaust duct (16). The assembly (22) includes a grease collecting baffle (54) facing the hood (14) and a heat exchanger (52) backing the baffle (54). The heat exchanger (52) includes a liquid flow path (56), (60), (74) through which water to be heated by the fumes may circulate.